CN112761567B - Drilling and cracking integrated hole sealing device suitable for coal roadway and using method - Google Patents
Drilling and cracking integrated hole sealing device suitable for coal roadway and using method Download PDFInfo
- Publication number
- CN112761567B CN112761567B CN202011638433.1A CN202011638433A CN112761567B CN 112761567 B CN112761567 B CN 112761567B CN 202011638433 A CN202011638433 A CN 202011638433A CN 112761567 B CN112761567 B CN 112761567B
- Authority
- CN
- China
- Prior art keywords
- channel
- sliding
- communicated
- shell
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 116
- 238000005553 drilling Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005336 cracking Methods 0.000 title claims abstract description 19
- 239000003245 coal Substances 0.000 title claims abstract description 17
- 239000002775 capsule Substances 0.000 claims abstract description 111
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 238000012856 packing Methods 0.000 claims abstract description 80
- 239000002184 metal Substances 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims description 141
- 238000004891 communication Methods 0.000 claims description 46
- 238000006243 chemical reaction Methods 0.000 claims description 38
- 238000002347 injection Methods 0.000 claims description 32
- 239000007924 injection Substances 0.000 claims description 32
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims 1
- 230000003068 static effect Effects 0.000 abstract description 10
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
- E21B33/1212—Packers; Plugs characterised by the construction of the sealing or packing means including a metal-to-metal seal element
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A drilling and cracking integrated hole sealing device suitable for a coal roadway and a using method are disclosed, wherein the device comprises the following steps: the device comprises a lower hole packer, an upper hole packer and a fracturing pipe, wherein metal shells of the upper hole packer and the lower hole packer are respectively composed of a sliding shell and a fixed shell, and a packing capsule is arranged in the metal shells; the sliding shell is in sliding fit with the fixed shell; a telescopic pipe penetrates through the packing capsule, and a water path is communicated between the telescopic pipe and a drill bit at the top end of the upper hole packer; a water path communicated to the packing capsule is arranged in the metal shell; the using method comprises the following steps: a connecting device; the drilling rod is driven to rotate by the drilling rod to carry out drilling operation, and the hole sealing device is returned to a pre-cracking point; replacing a static pressure water pipe at the bottom of the drill rod with a high-pressure water pipe for pressurization; continuously and slowly pressurizing, and when the pressure is greater than 17MPa, accelerating the pressurizing speed to set fracturing pressure to perform fracturing operation; and stopping pressurizing, and opening a pressure relief switch to relieve pressure. The device and the using method can realize drilling and cracking integrated operation.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a drilling and cracking integrated hole sealing device suitable for a coal roadway.
Background
Since the introduction of the hydraulic fracturing technology from oil and gas wells into the coal industry, the technology has been widely used in the production of coal mines. The hydraulic fracturing technology flow in coal mine production basically comprises the following steps: drilling, adding a drill rod to continue pushing, withdrawing the drill rod after drilling, pushing the hole sealing device through the steel pipe, fracturing, withdrawing the hole sealing device and the steel pipe. The prior art mainly has the following defects: firstly, a large amount of time is consumed for loading and unloading two sets of steel pipes every time of fracturing, so that the labor load of moving the fracturing point is large; secondly, the capsule and the pressure pipe are exposed by the hole packer, and the capsule and the pressure pipe are easy to rub against the hole wall to be damaged in the advancing process of the hole packer; thirdly, in the process of withdrawing the hole sealing device, the hole sealing device is easy to clamp, and if a fracturing sequence of fracturing points from top to bottom is adopted, the drilled holes and the packing device can be scrapped; fourthly, a certain time difference exists between the completion of drilling and fracturing, and the hole wall is easy to collapse, so that the hole packer cannot advance and fracture.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the drilling and cracking integrated hole sealing device suitable for the coal roadway, which can realize drilling and cracking integrated operation, reduce intermediate links of operation, greatly improve the operation efficiency, reduce the labor load of the intermediate operation link, effectively protect a packing capsule in the operation process, avoid the occurrence of clamping in the hole sealing device retreating process and reduce the probability of hole wall collapse.
In order to achieve the purpose, the invention provides a drilling and cracking integrated hole sealing device suitable for a coal roadway, which comprises a lower hole sealing device, an upper hole sealing device and a fracturing pipe, wherein the lower hole sealing device comprises a lower metal shell, a lower packing capsule, a plurality of lower vertical guide rods and a lower telescopic pipe, the lower metal shell consists of an upper sliding shell B and a lower fixed shell B, the lower part of the upper sliding shell B is provided with an upper containing cavity B at the axis, the lower end of the upper sliding shell B is provided with lower sawteeth B in the circumferential direction of the opening end of the upper containing cavity B, the upper end of the upper sliding shell B is provided with an upper mounting hole B at the axis, and the upper part of the upper mounting hole B is provided with an upper threaded hole B; a lower accommodating cavity B is formed in the upper part of the lower fixing shell B at the axis, upper sawteeth B are formed in the upper end of the lower fixing shell B in the circumferential direction of the opening end of the lower accommodating cavity B, and a lower threaded hole B matched with the connecting end of the drill rod is formed in the axis of the lower end of the lower fixing shell B; the upper sliding shell B and the lower fixing shell B in an abutting state are radially limited through meshing fit, and an inner cavity B of the lower metal shell is formed through the upper accommodating cavity B and the lower accommodating cavity B; the part of the lower fixing shell B between the lower threaded hole B and the lower containing cavity B is a flow control section B; the lower end of the lower packing capsule is provided with a fixed sealing joint B, and the upper end of the lower packing capsule is provided with a sliding sealing joint B; the lower packing capsule is assembled in the inner cavity B, the fixed sealing joint B is fixedly installed at the bottom of the lower accommodating cavity B, and the sliding sealing joint B is arranged in the upper accommodating cavity B in a sliding manner; a lower fixing hole B communicated with the inner cavity of the lower packing capsule is formed in the axis of the lower end of the fixed sealing joint B, an upper sliding hole B communicated with the inner cavity of the lower packing capsule is formed in the axis of the upper end of the sliding sealing joint B, and a plurality of upper guide holes B communicated with the inner cavity of the lower packing capsule are formed in the outer side of the sliding hole B; the lower end of the lower vertical guide rod is fixedly connected with a lower limiting ring B positioned in the lower packing capsule, and the upper end of the lower vertical guide rod is fixedly connected with the top end of the upper containing cavity B; a penetrating water injection channel is formed in the axis of at least one lower vertical guide rod, a drainage channel B is formed in the upper end of the upper sliding shell B, the lower end of the drainage channel B is communicated with the upper end of the water injection channel, and the upper end of the drainage channel B is communicated with one side of the upper mounting hole B;
a main liquid outlet channel B extending downwards is formed in the axis of the upper end of the flow control section B, a main liquid inlet channel B extending upwards is formed in the axis of the lower end of the flow control section B, and a first communicating channel, an overflowing conversion cavity, a second communicating channel, a third communicating channel, a fourth communicating channel, a fifth communicating channel and a sixth communicating channel are formed in the flow control section B on the outer side of the axis; the liquid inlet end of the main liquid inlet channel B is communicated with the upper end of the lower threaded hole B; the middle part of the main liquid inlet channel B is radially limited and is provided with a plunger B in an axially sliding and sealing fit manner, and the upper end of the plunger B is connected with the closed end of the main liquid inlet channel B through a second spring; the middle part of the plunger B is radially penetrated and provided with a seventh communicating channel extending left and right, the axis of the plunger B is provided with an eighth communicating channel extending axially, the upper end of the eighth communicating channel extends into the seventh communicating channel, and the lower end of the eighth communicating channel extends to the lower end surface of the plunger B; the upper end and the lower end of the first communicating channel are respectively communicated with the liquid inlet end of the main liquid outlet channel B and the lower part of the main liquid inlet channel B; the middle part above the over-current conversion cavity is provided with a vertical sliding chute A communicated with the over-current conversion cavity, the right part above the over-current conversion cavity is provided with a vertical sliding chute B communicated with the over-current conversion cavity, the inside of the over-current conversion cavity is provided with a conversion piston body, the upper end of the conversion piston body is fixedly connected with a sliding rod A and a plunger A respectively at the parts corresponding to the vertical sliding chute A and the vertical sliding chute B, the sliding rod A is inserted into the vertical sliding chute A in a sliding mode and is connected with the closed end of the vertical sliding chute A through a first spring, and the plunger A is inserted into the vertical sliding chute B in a sliding and sealing mode; the second communicating channel is positioned at the lower part of the overflowing converting cavity, and the liquid inlet end and the liquid outlet end of the second communicating channel are respectively communicated with the middle part of the main liquid inlet channel B and the middle part of the lower end of the overflowing converting cavity; the third communicating channel is positioned at the upper part of the over-current conversion cavity, and the liquid inlet end and the liquid outlet end of the third communicating channel are respectively communicated with the left part of the upper end of the over-current conversion cavity and the middle part of the main liquid outlet channel B; the fourth communicating channel is positioned at the lower part of the second communicating channel, the middle part of the fourth communicating channel is provided with a one-way valve, the liquid outlet end and the liquid inlet end of the fourth communicating channel are respectively communicated with the liquid inlet end of the main liquid inlet channel B and the middle part of the second communicating channel, the liquid inlet end of the one-way valve is communicated with the second communicating channel, and the liquid outlet end of the fourth communicating channel is communicated with the main liquid inlet channel B; the liquid inlet end and the liquid outlet end of the fifth communicating channel are respectively communicated with the middle part of the second communicating channel and the middle part of the vertical chute B; the lower end of the sixth communication channel is communicated with the upper end of the vertical chute B, and the upper end of the sixth communication channel extends to a position close to the bottom of the lower containing cavity B and is communicated with an inner cavity in the lower packing capsule through an auxiliary pipeline B penetrating through the fixed sealing joint B; under the state that the second spring is not compressed, the plunger B is positioned at the lower part of the main liquid inlet channel B and seals the liquid inlet end of the second communicating channel, the seventh communicating channel is communicated with the first communicating channel, and the lower end of the plunger B is positioned above the liquid outlet end of the fourth communicating channel; when the second spring reaches the opening pressure and is compressed, the plunger B slides to the upper part of the main liquid inlet channel B, the liquid inlet end of the first communicating channel is sealed, and the seventh communicating channel is communicated with the liquid inlet ends of the second communicating channel; under the uncompressed state of the first spring, the conversion piston body is tightly abutted against the lower end of the overflowing conversion cavity and closes the liquid outlet end of the second communication channel, the upper end of the plunger A is positioned at the lower part of the vertical sliding groove B and does not depart from the vertical sliding groove B, the liquid outlet end of the fifth communication channel is opened, when the first spring reaches the opening pressure and is compressed, the lower end of the plunger A slides into the vertical sliding groove B and closes the liquid outlet end of the fifth communication channel, meanwhile, the conversion piston body departs from the lower end of the overflowing conversion cavity and opens the liquid outlet end of the second communication channel, and in the process of moving the conversion piston body up and down, the liquid inlet end of the third communication channel is always in an open state;
the lower telescopic pipe is arranged at the axle center of the lower packing capsule, the lower end of the lower telescopic pipe penetrates through the lower fixing hole B and then is fixedly inserted into the inner part of the upper end of the main liquid outlet channel B, and the upper end of the lower telescopic pipe penetrates through the upper sliding hole B in a sliding manner and then extends upwards to penetrate to the bottom of the upper mounting hole B and is fixedly connected with the upper sliding shell B;
the upper hole packer comprises an upper metal shell, an upper packing capsule, a plurality of upper vertical guide rods and an upper telescopic pipe, wherein the upper metal shell consists of an upper sliding shell A and a lower fixing shell A, the lower part of the upper sliding shell A is provided with an upper containing cavity A at the axis, the lower end of the upper sliding shell A is provided with lower sawteeth A in the circumferential direction of the opening end of the upper containing cavity A, and the upper end of the upper sliding shell A is provided with an upper threaded hole A matched with the connecting end of a drill bit at the axis; the upper part of the lower fixing shell A is provided with a lower accommodating cavity A at the axis, the upper end of the lower fixing shell A is provided with upper sawteeth A in the circumferential direction of the opening end of the lower accommodating cavity A, the lower end axis of the lower accommodating cavity A is provided with a lower mounting hole A, and the lower part of the lower mounting hole A is provided with a lower threaded hole A; the upper sliding shell A and the lower fixing shell A in an abutting state are radially limited through meshing fit, and an inner cavity A of the upper metal shell is formed through the upper accommodating cavity A and the lower accommodating cavity A; the part of the lower fixed shell A between the lower mounting hole A and the lower containing cavity A is a flow control section A; the lower end of the upper packing capsule is provided with a fixed sealing joint A, and the upper end of the upper packing capsule is provided with a sliding sealing joint A; the upper packing capsule is assembled in the inner cavity A, the fixed sealing joint A is fixedly installed at the bottom of the lower accommodating cavity A, and the sliding sealing joint A is arranged in the upper accommodating cavity A in a sliding manner; a lower fixing hole A communicated with the inner cavity of the upper packing capsule is formed in the axis of the lower end of the fixed sealing joint A, an upper sliding hole A communicated with the inner cavity of the upper packing capsule is formed in the axis of the upper end of the sliding sealing joint A, and a plurality of upper guide holes A communicated with the inner cavity of the upper packing capsule are formed in the outer side of the sliding hole A; the upper vertical guide rods are arranged in the upper guide holes A in a sliding manner, the lower ends of the upper vertical guide rods are fixedly connected with lower limiting rings A positioned in the upper packing capsules, and the upper ends of the upper vertical guide rods are fixedly connected with the top ends of the upper containing cavities A;
the axial center of the flow control section A is provided with an axially through flow passage, the outer side of the lower part of the flow passage is also provided with an annular cutting cavity coaxially, and the inner part of the flow control section A is provided with a bypass passage and a drainage passage A on the outer side of the axial center; the liquid inlet end and the liquid outlet end of the bypass channel are respectively communicated with the middle part of the overflowing channel and the upper end of the overflowing channel; a plug is fixedly connected to the part, between the liquid inlet end and the liquid outlet end, of the bypass channel inside the overflowing channel; a piston A is arranged in the annular cutting cavity in a sliding seal fit manner, the center of the upper end of the piston A is fixedly connected with a plunger C, and the plunger C is radially limited and axially assembled in the overflowing channel in a sliding seal manner; the upper end of the plunger C is connected with the lower end of the plug through a third spring; the piston A and the plunger C form a switching valve block, and an arc-shaped channel is formed inside the switching valve block; the lower end of the arc-shaped channel extends to the center of the lower end of the piston A, and the upper end of the arc-shaped channel extends to the left side wall of the plunger C; when the third spring is in an uncompressed state, the upper end of the arc-shaped channel is communicated with the liquid inlet end of the bypass channel, and when the third spring reaches an opening pressure and is compressed, the switching valve block slides upwards and staggers the upper end of the arc-shaped channel and the liquid inlet end of the bypass channel, so that the liquid inlet end of the bypass channel is closed; the liquid outlet end of the drainage channel A is communicated with the inner cavity of the upper packing capsule through an auxiliary pipeline A penetrating through the fixed sealing joint A, and the liquid inlet end of the drainage channel A extends to one side of the lower mounting hole A;
the upper telescopic pipe is arranged at the axle center of the upper packing capsule, the lower end of the upper telescopic pipe penetrates through the lower fixing hole A and then is fixedly inserted into the inner part of the upper end of the overflowing channel, and the upper end of the upper telescopic pipe penetrates through the upper sliding hole A in a sliding manner and then is stopped at the lower end of the upper threaded hole A and is communicated with the upper threaded hole A;
the outer diameter of the fracturing pipe is smaller than that of the lower metal shell and the upper metal shell, an upper connecting boss and a lower connecting boss are fixedly connected to the axle centers of the upper end and the lower end of the fracturing pipe respectively, external threads C and external threads D are arranged outside the upper connecting boss and the lower connecting boss respectively, and the external threads C and the external threads D are matched with the lower threaded hole A and the upper threaded hole B respectively; the inner part of the fracturing pipe is provided with a fracturing channel which is communicated with the axis, the outer side of the axis in the fracturing pipe is also provided with a capsule water injection channel, the upper end of the capsule water injection channel extends to the side wall of one side of the upper connecting boss, and the lower end of the capsule water injection channel extends to the side wall of one side of the lower connecting boss; a plurality of radial water outlet holes are formed in the fracturing pipe, and the radial water outlet holes are communicated with the outside of the fracturing pipe and the fracturing channel; the upper connecting boss is fixedly mounted in the lower mounting hole A through thread fit, the lower connecting boss is fixedly mounted in the upper mounting hole B through thread fit, and when the fracturing pipe is in a fastening connection state with the lower hole packer and the upper hole packer, the lower end of the capsule water injection channel is communicated with the upper end of the drainage channel B, and the upper end of the capsule water injection channel is communicated with the lower end of the drainage channel A.
Furthermore, in order to improve the connection sealing performance, the upper connection boss is respectively provided with an annular groove A at the upper part and the lower part of the upper end of the capsule water injection channel, and a sealing ring A is arranged in the annular groove A; the upper part and the lower part of the lower end of the capsule water injection channel of the lower connecting boss are respectively provided with an annular groove B, and a sealing ring B is arranged in the annular groove B.
Further, in order to effectively improve the working efficiency and the working effect, the opening pressure of the second spring is 4 MPa; the opening pressure of the first spring is 16 MPa; the opening pressure of the third spring is 4 MPa.
Furthermore, in order to effectively avoid the sliding shell from rubbing and blocking the capsule when being far away from the fixed shell, the interval between the side walls of the lower metal shell and the lower packing capsule and the interval between the side walls of the upper metal shell and the upper packing capsule are both 0.5 cm.
According to the invention, the metal shell consists of the sliding shell and the fixed shell, so that the packing capsule can be wrapped in the metal shell in the installation stage, and the packing capsule can be effectively protected; the sliding shell is internally provided with the vertical guide rod, so that the sliding shell can only axially move relative to the fixed shell in the sliding process; the lower end of the vertical guide rod is connected with the limiting block, so that the sliding shell can be jacked up to the upper part by using the pressure difference of water injection, and the exposing of the packing capsule is realized; the first spring elastically acts on the plunger B, so that the static pressure water path and the high pressure water path can be conveniently opened and closed; the first spring elastically acts on the conversion piston body, so that a water path from the high-pressure pipeline to the fracturing channel and the packing capsule can be conveniently opened and closed; the static pressure water pipeline can be conveniently opened and closed by the elastic action of the third spring on the switching valve block; the one-way valve arranged in the fourth communication channel can facilitate the pressure relief operation of the packing capsule. The device can realize boring, split integral type operation, can reduce the intermediate link of operation, improvement operating efficiency that can be very big, simultaneously, can alleviate the work load of intermediate operation link, can effectively protect packing capsule, can avoid moving back the condition emergence that the hole packer in-process blocked, can reduce the probability that the pore wall collapses at the operation in-process.
The invention also provides a use method of the drilling and cracking integrated hole sealing device suitable for the coal roadway, which specifically comprises the following steps:
the method comprises the following steps: a connection stage; the lower hole sealing device and the upper hole sealing device are tightly connected through a fracturing pipe to form a hole sealing device, a drill bit is fixedly connected in an upper threaded hole A at the upper end of an upper sliding shell A, a drill rod is fixedly connected in a lower threaded hole B at the lower end of a lower fixing shell B, the drill rod is installed in a drill boom of a drilling machine, and meanwhile, a static pressure water supply pipeline is connected to the bottom of the drill rod;
step two: a drilling stage; the drilling rod is driven to rotate by the drilling rod to carry out drilling operation, the hole sealing device is continuously pushed forward for 2m after the hole sealing device is punched to the pre-cracking point, and then the hole sealing device is returned to the pre-cracking point;
step three: a hole sealing stage; the static pressure water pipe at the bottom of the drill rod is changed into a high-pressure water pipe, a water flow meter, a pressure meter and a pressure relief switch are arranged on the high-pressure water pipe, the water pressure is increased to gradually pressurize the pipeline to 12-16 MPa, and when the water flow meter shows that the flow is 0, the hole sealing device completes pressurization;
step four: a fracturing stage; continuously and slowly pressurizing, and when the pressure is greater than 17MPa, accelerating the pressurizing speed to set fracturing pressure to perform fracturing operation;
step five: a pressure relief stage; stopping pressurizing the high-pressure pipeline, opening a pressure relief switch, and completing pressure relief when no water is discharged from the hole sealing device;
step six: and performing fracturing operation at the next pre-fracturing point according to the steps from one to five.
Further, in the step one, the water pressure in the static pressure water pipe is less than 4MPa, so that the water flow can be directly supplied to the end part of the drill bit through the passage for use in the drilling operation.
The method has simple steps, can realize the drilling and cracking integrated operation process, reduces the intermediate links of the operation and greatly improves the operation efficiency.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of an upper hole packer in the present invention;
FIG. 3 is a schematic structural view of a lower hole packer of the present invention;
FIG. 4 is a schematic diagram of the structure of a fracturing pipe of the present invention;
FIG. 5 is a schematic structural view of a lower stationary casing B according to the present invention;
fig. 6 is a schematic structural view of the lower stationary casing a of the present invention.
In the figure: 1. a lower hole packer, 2, an upper hole packer, 3, a fracturing pipe, 4, a lower metal shell, 5, a lower packing capsule, 6, a lower vertical guide rod, 7, a lower telescopic pipe, 8, an upper sliding shell B, 9, a lower fixed shell B, 10, an upper containing cavity B, 11, a lower containing cavity B, 12, a fixed sealing joint B, 13, a sliding sealing joint B, 14, a lower limiting ring B, 15, a flow control section B, 16, a main liquid outlet channel B, 17, a main liquid inlet channel B, 18, a first communicating channel, 19, an overflowing converting cavity, 20, a second communicating channel, 21, a third communicating channel, 22, a fourth communicating channel, 23, a fifth communicating channel, 24, a sixth communicating channel, 25, a vertical sliding chute A, 26, a vertical sliding chute B, 27, a converting piston body, 28, a sliding rod A, 29, a plunger A, 30, a first spring, 31, a one-way valve, 32 and an auxiliary pipeline B, 33. plunger B, 34, a seventh communication channel, 35, a second spring, 36, an upper metal shell, 37, an upper packing capsule, 38, an upper vertical guide rod, 39, an upper telescopic pipe, 40, an upper sliding shell A, 41, a lower fixed shell A, 42, an upper containing cavity A, 43, a lower containing cavity A, 44, a flow control section A, 45, a fixed sealing joint A, 46, a sliding sealing joint A, 47, a water injection channel, 48, a drainage channel B, 49, a lower limiting ring A, 50, a flow passage channel, 51, a plunger C, 52, a bypass channel, 53, a drainage channel A, 54, an annular cutting cavity, 55, a piston A, 56, a plug, 57, a third spring, 58, an auxiliary pipeline A, 59, a lower mounting hole A, 60, an upper connecting boss, 61, a lower connecting boss, 62, a fracturing channel, 63, a capsule flow passage, 64, a radial direction, 65, a drill rod, 66 and a drill bit, 67. the upper mounting holes B, 68, the upper threaded holes B, 69, the lower threaded holes B, 70, the upper threaded holes A, 71, the arc-shaped channels, 72 and the eighth communication channel.
Detailed Description
The present invention is further described below.
As shown in fig. 1 to 6, the drilling and fracturing integrated hole sealing device suitable for a coal roadway comprises a lower hole sealing device 1, an upper hole sealing device 2 and a fracturing pipe 3, wherein the lower hole sealing device 1 comprises a lower metal shell 4, a lower packing capsule 5, a plurality of lower vertical guide rods 6 and a lower telescopic pipe 7, the lower metal shell 4 consists of an upper sliding shell B8 and a lower fixing shell B9, an upper containing cavity B10 is formed in the lower part of the upper sliding shell B8 at the axis, lower sawteeth B are formed in the lower end of the upper sliding shell B8 at the circumferential direction of the opening end of an upper containing cavity B10, an upper mounting hole B67 is formed in the upper end of an upper sliding shell B8 at the axis, and an upper threaded hole B68 is formed in the upper part of the upper mounting hole B67; the upper part of the lower fixing shell B9 is provided with a lower accommodating cavity B11 at the axis, the upper end of the lower fixing shell B9 is provided with upper sawteeth B in the circumferential direction of the opening end of the lower accommodating cavity B11, and the lower end axis of the lower fixing shell B9 is provided with a lower threaded hole B69 matched with the connecting end of the drill rod 65; the upper sliding shell B8 and the lower fixed shell B9 in the abutting state are radially limited through meshing fit, and an inner cavity B of the lower metal shell 4 is formed through an upper containing cavity B10 and a lower containing cavity B11; the part of the lower fixed shell B9 between the lower threaded hole B69 and the lower containing cavity B11 is a flow control section B15; the lower end of the lower packing capsule 5 is provided with a fixed sealing joint B12, and the upper end is provided with a sliding sealing joint B13; the lower sealed capsule 5 is assembled in the inner cavity B, the fixed sealing joint B12 is fixedly installed at the bottom of the lower accommodating cavity B11, and the sliding sealing joint B13 is arranged in the upper accommodating cavity B10 in a sliding mode; a lower fixing hole B communicated with the inner cavity of the lower packing capsule 5 is formed in the axis of the lower end of the fixed sealing joint B12, an upper sliding hole B communicated with the inner cavity of the lower packing capsule 5 is formed in the axis of the upper end of the sliding sealing joint B13, and a plurality of upper guide holes B communicated with the inner cavity of the lower packing capsule 5 are formed in the outer side of the sliding hole B; the lower vertical guide rods 6 are arranged in the upper guide holes B in a sliding manner, the lower ends of the lower vertical guide rods 6 are fixedly connected with lower limiting rings B14 positioned in the lower packing capsules 5, and the upper ends of the lower vertical guide rods 6 are fixedly connected with the top ends of the upper containing cavities B10; the lower vertical guide rod 6 is in sliding sealing fit with the upper guide hole B; a penetrating water injection channel 47 is formed in the axis of at least one lower vertical guide rod 6, a drainage channel B48 is formed in the upper end of the upper sliding shell B8, the lower end of the drainage channel B48 is communicated with the upper end of the water injection channel 47, and the upper end of the drainage channel B48 is communicated with one side of the upper mounting hole B67;
a main liquid outlet channel B16 extending downwards is formed in the axis of the upper end of the flow control section B15, a main liquid inlet channel B17 extending upwards is formed in the axis of the lower end of the flow control section B15, and a first communicating channel 18, an overflowing conversion cavity 19, a second communicating channel 20, a third communicating channel 21, a fourth communicating channel 22, a fifth communicating channel 23 and a sixth communicating channel 24 are formed in the flow control section B15 and on the outer side of the axis; the liquid inlet end of the main liquid inlet channel B17 is communicated with the upper end of the lower threaded hole B69; the middle of the main liquid inlet channel B17 is radially limited and is provided with a plunger B33 in an axial sliding sealing fit manner, the upper end of a plunger B33 is connected with the closed end of the main liquid inlet channel B17 through a second spring 35, the middle of the plunger B33 is radially penetrated and provided with a seventh communication channel 34 extending left and right, the axis of a plunger B33 is provided with an eighth communication channel 72 extending axially, the upper end of the eighth communication channel 72 extends into the seventh communication channel 34, and the lower end of the eighth communication channel 72 extends to the lower end face of a plunger B33; the upper end and the lower end of the first communicating channel 18 are respectively communicated with the liquid inlet end of the main liquid outlet channel B16 and the lower part of the main liquid inlet channel B17; the middle part above the overflowing conversion cavity 19 is provided with a vertical sliding chute A25 communicated with the overflowing conversion cavity, the right part above the overflowing conversion cavity is provided with a vertical sliding chute B26 communicated with the overflowing conversion cavity, a conversion piston body 27 is arranged inside the overflowing conversion cavity 19, the upper end of the conversion piston body 27 is fixedly connected with a sliding rod A28 and a plunger A29 at the parts corresponding to the vertical sliding chute A25 and the vertical sliding chute B26 respectively, the sliding rod A28 is inserted into the vertical sliding chute A25 in a sliding manner and is connected with the closed end of the vertical sliding chute A25 through a first spring 31, and the plunger A29 is inserted into the vertical sliding chute B26 in a sliding and sealing manner; the second communicating channel 20 is positioned at the lower part of the overflowing converting cavity 19, and the liquid inlet end and the liquid outlet end of the second communicating channel are respectively communicated with the middle part of the main liquid inlet channel B17 and the middle part of the lower end of the overflowing converting cavity 19; the third communicating channel 21 is positioned at the upper part of the overflowing converting cavity 19, and the liquid inlet end and the liquid outlet end of the third communicating channel are respectively communicated with the left part of the upper end of the overflowing converting cavity 19 and the middle part of the main liquid outlet channel B16; the fourth communicating channel 22 is positioned at the lower part of the second communicating channel 20, the middle part of the fourth communicating channel is provided with a check valve 31, the liquid outlet end and the liquid inlet end of the fourth communicating channel are respectively communicated with the liquid inlet end of the main liquid inlet channel B17 and the middle part of the second communicating channel 20, the liquid inlet end of the check valve 31 is communicated with the second communicating channel 20, and the liquid outlet end of the check valve 31 is communicated with the main liquid inlet channel B17; the liquid inlet end and the liquid outlet end of the fifth communicating channel 23 are respectively communicated with the middle part of the second communicating channel 20 and the middle part of the vertical sliding groove B26; the lower end of the sixth communication channel 24 is communicated with the upper end of the vertical sliding chute B26, the upper end thereof extends to a position close to the bottom of the lower containing cavity B11 and is communicated with the inner cavity of the lower packing capsule 5 through an auxiliary pipeline B32 penetrating through a fixed sealing joint B12; in the state that the second spring 35 is not compressed, the plunger B33 is positioned at the lower part of the main liquid inlet channel B17 and closes the liquid inlet end of the second communication channel 20, the seventh communication channel 34 is communicated with the first communication channel 18, and the lower end of the plunger B33 is positioned above the liquid outlet end of the fourth communication channel 22, so that the action of the plunger B33 does not influence the drainage of the liquid outlet end of the fourth communication channel 22; when the second spring 35 reaches the opening pressure and is compressed, the plunger B33 slides to the upper part of the main liquid inlet channel B17 and closes the liquid inlet end of the first communicating channel 18, and the seventh communicating channel 34 communicates with the liquid inlet end of the second communicating channel 20; under the uncompressed state of the first spring 30, the switching piston body 27 is tightly abutted against the lower end of the excess flow switching cavity 19 and closes the liquid outlet end of the second communication channel 20, the upper end of the plunger a29 is positioned at the lower part of the vertical sliding groove B26 and does not depart from the vertical sliding groove B26, the liquid outlet end of the fifth communication channel 23 is opened, when the first spring 30 reaches the opening pressure and is compressed, the lower end of the plunger a29 slides into the vertical sliding groove B26 and closes the liquid outlet end of the fifth communication channel 23, meanwhile, the switching piston body 27 departs from the lower end of the excess flow switching cavity 19 and opens the liquid outlet end of the second communication channel 20, and in the process that the switching piston body 27 moves up and down, the liquid inlet end of the third communication channel 21 is always in the opened state;
the lower telescopic pipe 7 is arranged at the axle center of the lower packing capsule 5, the lower end of the lower telescopic pipe 7 penetrates out of the lower fixing hole B and then is fixedly inserted into the inner part of the upper end of the main liquid outlet channel B16, and the upper end of the lower telescopic pipe 7 penetrates out of the upper sliding hole B in a sliding manner and then extends upwards to penetrate through the bottom of the upper mounting hole B67 and is fixedly connected with the upper sliding shell B8; the lower telescopic pipe 7 is in sliding sealing fit with the upper sliding hole B;
the upper hole packer 2 comprises an upper metal shell 36, an upper packing capsule 37, a plurality of upper vertical guide rods 38 and an upper telescopic pipe 39, wherein the upper metal shell 36 consists of an upper sliding shell A40 and a lower fixing shell A41, an upper containing cavity A42 is formed in the axis of the lower part of the upper sliding shell A40, lower sawteeth A are formed in the lower end of the upper sliding shell A40 in the circumferential direction of the opening end of the upper containing cavity A42, and an upper threaded hole A matched with the connecting end of a drill bit 66 is formed in the axis of the upper end of the upper sliding shell A40; the upper part of the lower fixing shell A41 is provided with a lower accommodating cavity A43 at the axial center, the upper end of the lower fixing shell A41 is provided with upper sawteeth A on the circumferential direction of the opening end of the lower accommodating cavity A43, the lower end axial center of the lower accommodating cavity A43 is provided with a lower mounting hole A59, and the lower part of the lower mounting hole A59 is provided with a lower threaded hole A70; the upper sliding shell A40 and the lower fixed shell A41 in an abutting state are radially limited through meshing fit, and an inner cavity A of the upper metal shell 36 is formed through an upper containing cavity A42 and a lower containing cavity A43; the part of the lower fixed shell A41 between the lower mounting hole A59 and the lower containing cavity A43 is a flow control section A44; the lower end of the upper packing capsule 37 is equipped with a fixed sealing joint A45, and the upper end is equipped with a sliding sealing joint A46; the upper packing capsule 37 is assembled in the inner cavity A, the fixed sealing joint A45 is fixedly installed at the bottom of the lower containing cavity A43, and the sliding sealing joint A46 is arranged in the upper containing cavity A42 in a sliding way; a lower fixing hole A communicated with the inner cavity of the upper packing capsule 37 is formed in the axis of the lower end of the fixed sealing joint A45, an upper sliding hole A communicated with the inner cavity of the upper packing capsule 37 is formed in the axis of the upper end of the sliding sealing joint A46, and a plurality of upper guide holes A communicated with the inner cavity of the upper packing capsule 37 are formed in the outer side of the sliding hole A; the upper vertical guide rods 38 are arranged in the upper guide holes A in a sliding manner, the lower ends of the upper vertical guide rods 38 are fixedly connected with lower limiting rings A49 positioned in the upper packing capsules 37, and the upper ends of the upper vertical guide rods 38 are fixedly connected with the top ends of the upper containing cavities A42; the upper vertical guide rod 38 is in sliding sealing fit with the upper guide hole A;
the axial center of the flow control section A44 is provided with an axial through flow passage 50, the outer side of the lower part of the flow passage 50 is also provided with an annular cutting cavity 54 coaxially, and the inner part of the flow control section A44 is provided with a bypass passage 52 and a flow guide passage A53 on the outer side of the axial center; the liquid inlet end and the liquid outlet end of the bypass channel 52 are respectively communicated with the middle part of the overflowing channel 50 and the upper end of the overflowing channel 50; a plug 56 is fixedly connected to the part, between the liquid inlet end and the liquid outlet end, of the bypass channel 52 in the overflowing channel 50; the plug 56 is integrally formed in the transition passage 50 to ensure sufficient pressure and good sealing performance; a piston A55 is arranged in the annular cutting cavity 54 in a sliding sealing fit manner, the center of the upper end of the piston A55 is fixedly connected with a plunger C51, and the plunger C51 is radially limited and axially assembled in the overflowing channel 50 in a sliding sealing manner; the upper end of the plunger C51 is connected with the lower end of the plug 56 through a third spring 57; the piston A55 and the plunger C51 form a switching valve block, and an arc-shaped channel 71 is formed inside the switching valve block; the lower end of the arcuate channel 71 extends to the center of the lower end of the piston a55 and the upper end extends to the left side wall of the plunger C51; when the third spring 57 is not compressed, the upper end of the arc-shaped channel 71 is communicated with the liquid inlet end of the bypass channel 52, and when the third spring 57 reaches the opening pressure and is compressed, the switching valve block slides upwards and staggers the upper end of the arc-shaped channel 71 with the liquid inlet end of the bypass channel 52, so that the liquid inlet end of the bypass channel 52 is closed; the liquid outlet end of the drainage channel A53 is communicated with the inner cavity of the upper packing capsule 37 through an auxiliary pipeline A58 penetrating through a fixed sealing joint A45, and the liquid inlet end of the drainage channel A53 extends to one side of the lower mounting hole A59;
the upper telescopic pipe 39 is arranged at the axle center of the upper packing capsule 37, the lower end of the upper telescopic pipe 39 penetrates through the lower fixing hole A and then is fixedly inserted into the inner part of the upper end of the overflowing channel 50, and the upper end of the upper telescopic pipe 39 penetrates through the upper sliding hole A in a sliding manner and then is stopped at the lower end of the upper threaded hole A and is communicated with the upper threaded hole A; the upper telescopic pipe 39 is matched with the upper sliding hole A in a sliding and sealing way;
the outer diameter of the fracturing pipe 3 is smaller than the outer diameters of the lower metal shell 4 and the upper metal shell 36, the axle centers of the upper end and the lower end of the fracturing pipe 3 are fixedly connected with an upper connecting boss 60 and a lower connecting boss 61 respectively, the outer parts of the upper connecting boss 60 and the lower connecting boss 61 are provided with an external thread C and an external thread D respectively, and the external thread C and the external thread D are matched with a lower threaded hole A70 and an upper threaded hole B68 respectively; a fracturing channel 62 which is communicated with the axis of the interior of the fracturing pipe 3, a capsule water injection channel 63 is also arranged on the outer side of the axis of the interior of the fracturing pipe 3, the upper end of the capsule water injection channel 63 extends to the side wall of one side of the upper connecting boss 60, and the lower end of the capsule water injection channel 63 extends to the side wall of one side of the lower connecting boss 61; a plurality of radial water outlet holes 64 are formed in the fracturing pipe 3, and the radial water outlet holes 64 are communicated with the outside of the fracturing pipe 3 and the fracturing channel 62; the upper connecting boss 60 is fixedly mounted in the lower mounting hole A59 through thread fit, the lower connecting boss 61 is fixedly mounted in the upper mounting hole B67 through thread fit, and when the fracturing pipe 3 is in a fastening connection state with the lower hole packer 1 and the upper hole packer 2, the lower end of the capsule water injection channel 63 is communicated with the upper end of the drainage channel B48, and the upper end of the capsule water injection channel 63 is communicated with the lower end of the drainage channel A53.
In order to improve the connection sealing performance, the upper connection boss 60 is provided with an annular groove A at the upper part and the lower part of the upper end of the capsule water injection channel 63 respectively, and a sealing ring A is arranged in the annular groove A; the lower connection boss 61 is provided with an annular groove B at the upper and lower portions of the lower end of the capsule water injection passage 63, respectively, and a sealing ring B is installed in the annular groove B.
In order to effectively improve the working efficiency and the working effect, the opening pressure of the second spring 35 is 4 MPa; the opening pressure of the first spring 30 is 16 MPa; the opening pressure of the third spring 57 is 4 MPa.
In order to effectively avoid the sliding shell from being clamped by the capsule when the sliding shell is far away from the fixed shell, the interval between the side walls of the lower metal shell 4 and the lower capsule 5 and the interval between the side walls of the upper metal shell 36 and the upper capsule 37 are both 0.5 cm.
The invention also provides a use method of the drilling and cracking integrated hole sealing device suitable for the coal roadway, which specifically comprises the following steps:
the method comprises the following steps: a connection stage; the lower hole packer 1 and the upper hole packer 2 are tightly connected through the fracturing pipe 3 to form a hole sealing device, a drill bit 66 is fixedly connected in an upper threaded hole A at the upper end of an upper sliding shell A40, a drill rod 65 is fixedly connected in a lower threaded hole B69 at the lower end of a lower fixing shell B9, the drill rod 65 is installed in a drill boom of a drilling machine, and meanwhile, a static pressure water supply pipeline is connected to the bottom of the drill rod 65;
step two: a drilling stage; the drilling rod 65 is driven by the drill rod to rotate to carry out punching operation, the hole sealing device is continuously pushed forward for 2m after the hole sealing device is punched to the pre-cracking point, so that a space for the sliding metal shell to rise is reserved when the hole sealing device is pressurized, and then the hole sealing device is returned to the pre-cracking point;
step three: a hole sealing stage; the static pressure water pipe at the bottom of the drill rod is changed into a high-pressure water pipe, a water flow meter, a pressure meter and a pressure relief switch are arranged on the high-pressure water pipe, the water pressure is increased to gradually pressurize the pipeline to 12-16 MPa, and when the water flow meter shows that the flow is 0, the hole sealing device completes pressurization;
in the process, when the pressure of the high-pressure water pipe is more than 4MPa, the plunger B opens the liquid inlet end of the second communication channel, the high-pressure water pipe is communicated, the static-pressure water pipe is closed, the high-pressure water enters the packing capsule and then floats to the upper part of the packing capsule under the action of pressure difference, at the moment, the sliding drill shell outside the packing capsule rises to the upper part of the hole packer, and the packing capsule gradually expands and extrudes the hole wall along with the pressure of water in the capsule; when the flow meter shows that the flow is 0, the pressure in the packing capsule reaches the water injection pressure;
step four: a fracturing stage; continuously and slowly pressurizing, and when the pressure is greater than 17MPa, accelerating the pressurizing speed to set fracturing pressure to perform fracturing operation;
when the pressure of the high-pressure water pipe is greater than 17MPa, the conversion piston body 27 moves upwards to open the liquid outlet end of the second communication channel, the water injection pipeline of the packing capsule is closed, the fracturing channel is opened, and high-pressure water acts on the switching valve block through the water channel to close the bypass channel, so that all high-pressure water is sprayed out of the radial water outlet holes to perform fracturing operation.
Step five: a pressure relief stage; stopping pressurizing the high-pressure pipeline, opening a pressure relief switch, and completing pressure relief when no water is discharged from the hole sealing device;
and stopping water injection of the high-pressure water pipe, closing the liquid inlet end of the second communication channel by the plunger B, closing the high-pressure water pipe, and communicating the static-pressure water pipe. The high-pressure fracturing water flows out from the telescopic pipe, the static pressure water pipe, the high-pressure water pipe and the pressure relief switch. When the high-pressure fracturing water and the high-pressure water in the hole sealing capsule have the same water pressure, the high-pressure water in the hole sealing capsule can flow out from the one-way valve to release pressure.
Step six: and performing fracturing operation at the next pre-fracturing point according to the steps from one to five.
In the first step, the water pressure in the static pressure water pipe is less than 4MPa, so that the water flow can be directly supplied to the end part of the drill bit through the passage for use in drilling operation.
Claims (4)
1. The drilling and cracking integrated hole sealing device suitable for the coal roadway comprises a lower hole sealing device (1), an upper hole sealing device (2) and a fracturing pipe (3), and is characterized in that the lower hole sealing device (1) comprises a lower metal shell (4), a lower packing capsule (5), a plurality of lower vertical guide rods (6) and a lower telescopic pipe (7), the lower metal shell (4) consists of an upper sliding shell B (8) and a lower fixed shell B (9), an upper containing cavity B (10) is formed in the position of an axis of the lower part of the upper sliding shell B (8), lower sawteeth B are formed in the circumferential direction of the opening end of the upper containing cavity B (10) at the lower end of the upper sliding shell B (8), an upper mounting hole B (67) is formed in the position of the axis of the upper end of the upper sliding shell B (8), and an upper threaded hole B (68) is formed in the upper part of the upper mounting hole B (67); a lower accommodating cavity B (11) is formed in the axis of the upper portion of the lower fixing shell B (9), upper sawteeth B are formed in the upper end of the lower fixing shell B (9) in the circumferential direction of the opening end of the lower accommodating cavity B (11), and a lower threaded hole B (69) matched with the connecting end of the drill rod (65) is formed in the axis of the lower end of the lower fixing shell B (9); the upper sliding shell B (8) and the lower fixing shell B (9) in a butt joint state are radially limited through meshing fit, and an inner cavity B of the lower metal shell (4) is formed through an upper accommodating cavity B (10) and a lower accommodating cavity B (11); the part of the lower fixed shell B (9) between the lower threaded hole B (69) and the lower containing cavity B (11) is a flow control section B (15); the lower end of the lower packing capsule (5) is provided with a fixed sealing joint B (12), and the upper end of the lower packing capsule is provided with a sliding sealing joint B (13); the lower packing capsule (5) is assembled in the inner cavity B, the fixed sealing joint B (12) is fixedly installed at the bottom of the lower accommodating cavity B (11), and the sliding sealing joint B (13) is arranged in the upper accommodating cavity B (10) in a sliding manner; a lower fixing hole B communicated with the inner cavity of the lower packing capsule (5) is formed in the axis of the lower end of the fixed sealing joint B (12), an upper sliding hole B communicated with the inner cavity of the lower packing capsule (5) is formed in the axis of the upper end of the sliding sealing joint B (13), and a plurality of upper guide holes B communicated with the inner cavity of the lower packing capsule (5) are formed in the outer side of the sliding hole B; the lower vertical guide rods (6) are arranged in the upper guide holes B in a sliding manner, the lower ends of the lower vertical guide rods (6) are fixedly connected with lower limiting rings B (14) positioned in the lower packing capsules (5), and the upper ends of the lower vertical guide rods (6) are fixedly connected with the top ends of the upper containing cavities B (10); a penetrating water injection channel (47) is formed in the axis of at least one lower vertical guide rod (6), a drainage channel B (48) is formed in the upper end of the upper sliding shell B (8), the lower end of the drainage channel B (48) is communicated with the upper end of the water injection channel (47), and the upper end of the drainage channel B (48) is communicated with one side of the upper mounting hole B (67);
a main liquid outlet channel B (16) extending downwards is formed in the axis of the upper end of the flow control section B (15), a main liquid inlet channel B (17) extending upwards is formed in the axis of the lower end of the flow control section B, and a first communicating channel (18), an overflowing conversion cavity (19), a second communicating channel (20), a third communicating channel (21), a fourth communicating channel (22), a fifth communicating channel (23) and a sixth communicating channel (24) are formed in the flow control section B (15) and on the outer side of the axis; the liquid inlet end of the main liquid inlet channel B (17) is communicated with the upper end of the lower threaded hole B (69); the middle of the main liquid inlet channel B (17) is radially limited and is provided with a plunger B (33) in an axial sliding sealing fit manner, the upper end of the plunger B (33) is connected with the closed end of the main liquid inlet channel B (17) through a second spring (35), the middle of the plunger B (33) is radially penetrated and provided with a seventh communication channel (34) extending left and right, the axis of the plunger B (33) is provided with an eighth communication channel (72) extending axially, the upper end of the eighth communication channel (72) extends into the seventh communication channel (34), and the lower end of the eighth communication channel (72) extends to the lower end face of the plunger B (33); the upper end and the lower end of the first communicating channel (18) are respectively communicated with the liquid inlet end of the main liquid outlet channel B (16) and the lower part of the main liquid inlet channel B (17); the middle part above the overcurrent conversion cavity (19) is provided with a vertical sliding chute A (25) communicated with the overcurrent conversion cavity, the right part above the overcurrent conversion cavity is provided with a vertical sliding chute B (26) communicated with the overcurrent conversion cavity, a conversion piston body (27) is arranged inside the overcurrent conversion cavity (19), the upper end of the conversion piston body (27) is fixedly connected with a sliding rod A (28) and a plunger A (29) respectively at the parts corresponding to the vertical sliding chute A (25) and the vertical sliding chute B (26), the sliding rod A (28) is inserted into the vertical sliding chute A (25) in a sliding mode and is connected with the closed end of the vertical sliding chute A (25) through a first spring (30), and the plunger A (29) is inserted into the vertical sliding chute B (26) in a sliding and sealing mode; the second communicating channel (20) is positioned at the lower part of the overflowing converting cavity (19), and the liquid inlet end and the liquid outlet end of the second communicating channel are respectively communicated with the middle part of the main liquid inlet channel B (17) and the middle part of the lower end of the overflowing converting cavity (19); the third communicating channel (21) is positioned at the upper part of the overflowing converting cavity (19), and the liquid inlet end and the liquid outlet end of the third communicating channel are respectively communicated with the left part of the upper end of the overflowing converting cavity (19) and the middle part of the main liquid outlet channel B (16); the fourth communicating channel (22) is positioned at the lower part of the second communicating channel (20), the middle part of the fourth communicating channel is provided with a one-way valve (31), the liquid outlet end and the liquid inlet end of the fourth communicating channel are respectively communicated with the liquid inlet end of the main liquid inlet channel B (17) and the middle part of the second communicating channel (20), the liquid inlet end of the one-way valve (31) is communicated with the second communicating channel (20), and the liquid outlet end of the fourth communicating channel is communicated with the main liquid inlet channel B (17); the liquid inlet end and the liquid outlet end of the fifth communicating channel (23) are respectively communicated with the middle part of the second communicating channel (20) and the middle part of the vertical chute B (26); the lower end of a sixth communication channel (24) is communicated with the upper end of a vertical chute B (26), the upper end of the sixth communication channel extends to a position close to the bottom of the lower containing cavity B (11), and is communicated with an inner cavity in the lower packing capsule (5) through an auxiliary pipeline B (32) penetrating through the fixed sealing joint B (12); under the state that the second spring (35) is not compressed, the plunger B (33) is positioned at the lower part of the main liquid inlet channel B (17) and seals the liquid inlet end of the second communication channel (20), the seventh communication channel (34) is communicated with the first communication channel (18), and the lower end of the plunger B (33) is positioned above the liquid outlet end of the fourth communication channel (22); when the second spring (35) reaches the opening pressure and is compressed, the plunger B (33) slides to the upper part of the main liquid inlet channel B (17) and seals the liquid inlet end of the first communication channel (18), and the seventh communication channel (34) is communicated with the liquid inlet end of the second communication channel (20); under the state that the first spring (30) is not compressed, the conversion piston body (27) is tightly abutted against the lower end of the overcurrent conversion cavity (19), the liquid outlet end of the second communicating channel (20) is sealed, the upper end of the plunger A (29) is positioned at the lower part of the vertical chute B (26), the liquid outlet end of the fifth communicating channel (23) is opened without departing from the vertical sliding chute B (26), when the first spring (30) reaches the opening pressure and is compressed, the lower end of the plunger A (29) slides to the inside of the vertical sliding chute B (26) and closes the liquid outlet end of the fifth communication channel (23), meanwhile, the conversion piston body (27) is separated from the lower end of the overflowing conversion cavity (19), the liquid outlet end of the second communication channel (20) is opened, in the process that the conversion piston body (27) moves up and down, the liquid inlet end of the third communication channel (21) is always in an open state;
the lower telescopic pipe (7) is arranged at the axis of the lower packing capsule (5), the lower end of the lower telescopic pipe (7) penetrates out of the lower fixing hole B and then is fixedly inserted into the inner part of the upper end of the main liquid outlet channel B (16), and the upper end of the lower telescopic pipe (7) penetrates out of the upper sliding hole B in a sliding manner and then upwards extends to the bottom of the upper mounting hole B (67) and is fixedly connected with the upper sliding shell B (8);
the upper hole packer (2) comprises an upper metal shell (36), an upper packing capsule (37), a plurality of upper vertical guide rods (38) and an upper telescopic pipe (39), wherein the upper metal shell (36) consists of an upper sliding shell A (40) and a lower fixing shell A (41), an upper containing cavity A (42) is formed in the position of the axis of the lower part of the upper sliding shell A (40), lower saw teeth A are formed in the lower end of the upper sliding shell A (40) in the circumferential direction of the opening end of the upper containing cavity A (42), and an upper threaded hole A matched with the connecting end of a drill bit (66) is formed in the position of the axis of the upper end of the upper sliding shell A (40); a lower accommodating cavity A (43) is formed in the axis of the upper portion of the lower fixing shell A (41), upper sawteeth A are formed in the upper end of the lower fixing shell A (41) in the circumferential direction of the opening end of the lower accommodating cavity A (43), a lower mounting hole A (59) is formed in the axis of the lower end of the lower accommodating cavity A (43), and a lower threaded hole A (70) is formed in the lower portion of the lower mounting hole A (59); the upper sliding shell A (40) and the lower fixing shell A (41) in an abutting state are radially limited through meshing fit, and an inner cavity A of the upper metal shell (36) is formed through an upper accommodating cavity A (42) and a lower accommodating cavity A (43); the part of the lower fixed shell A (41) between the lower mounting hole A (59) and the lower containing cavity A (43) is a flow control section A (44); the lower end of the upper packing capsule (37) is provided with a fixed sealing joint A (45), and the upper end of the upper packing capsule is provided with a sliding sealing joint A (46); the upper packing capsule (37) is assembled in the inner cavity A, the fixed sealing joint A (45) is fixedly installed at the bottom of the lower accommodating cavity A (43), and the sliding sealing joint A (46) is arranged in the upper accommodating cavity A (42) in a sliding manner; a lower fixing hole A communicated with the inner cavity of the upper packing capsule (37) is formed in the axis of the lower end of the fixed sealing joint A (45), an upper sliding hole A communicated with the inner cavity of the upper packing capsule (37) is formed in the axis of the upper end of the sliding sealing joint A (46), and a plurality of upper guide holes A communicated with the inner cavity of the upper packing capsule (37) are formed in the outer side of the sliding hole A; the upper vertical guide rods (38) are arranged in the upper guide holes A in a sliding manner, the lower ends of the upper vertical guide rods (38) are fixedly connected with lower limiting rings A (49) positioned in the upper packing capsules (37), and the upper ends of the upper vertical guide rods (38) are fixedly connected with the top ends of the upper containing cavities A (42);
an axial through overflowing channel (50) is formed in the axis of the flow control section A (44), an annular cutting cavity (54) is coaxially formed in the outer side of the lower portion of the overflowing channel (50), and a bypass channel (52) and a drainage channel A (53) are formed in the flow control section A (44) on the outer side of the axis; the liquid inlet end and the liquid outlet end of the bypass channel (52) are respectively communicated with the middle part of the overflowing channel (50) and the upper end of the overflowing channel (50); a plug (56) is fixedly connected to the part, between the liquid inlet end and the liquid outlet end, of the bypass channel (52) in the overflowing channel (50); a piston A (55) is arranged in the annular cutting cavity (54) in a sliding sealing fit mode, the center of the upper end of the piston A (55) is fixedly connected with a plunger C (51), and the plunger C (51) is radially limited and axially assembled in the overflowing channel (50) in a sliding sealing mode; the upper end of the plunger C (51) is connected with the lower end of the plug (56) through a third spring (57); the piston A (55) and the plunger C (51) form a switching valve block, and an arc-shaped channel (71) is formed in the switching valve block; the lower end of the arc-shaped channel (71) extends to the center of the lower end of the piston A (55), and the upper end of the arc-shaped channel extends to the left side wall of the plunger C (51); when the third spring (57) is not compressed, the upper end of the arc-shaped channel (71) is communicated with the liquid inlet end of the bypass channel (52), and when the third spring (57) reaches the opening pressure and is compressed, the switching valve block slides upwards and staggers the upper end of the arc-shaped channel (71) and the liquid inlet end of the bypass channel (52), so that the liquid inlet end of the bypass channel (52) is closed; the liquid outlet end of the drainage channel A (53) is communicated with the inner cavity of the upper packing capsule (37) through an auxiliary pipeline A (58) penetrating through the fixed sealing joint A (45), and the liquid inlet end of the drainage channel A (53) extends to one side of the lower mounting hole A (59);
the upper telescopic pipe (39) is arranged at the axis of the upper packing capsule (37), the lower end of the upper telescopic pipe (39) penetrates out of the lower fixing hole A and then is fixedly inserted into the inner part of the upper end of the overflowing channel (50), and the upper end of the upper telescopic pipe (39) penetrates out of the upper sliding hole A in a sliding manner and then is stopped at the lower end of the upper threaded hole A and is communicated with the upper threaded hole A;
the outer diameter of the fracturing pipe (3) is smaller than the outer diameters of the lower metal shell (4) and the upper metal shell (36), the axle centers of the upper end and the lower end of the fracturing pipe (3) are fixedly connected with an upper connecting boss (60) and a lower connecting boss (61) respectively, external threads C and external threads D are arranged outside the upper connecting boss (60) and the lower connecting boss (61) respectively, and the external threads C and the external threads D are matched with a lower threaded hole A (70) and an upper threaded hole B (68) respectively; a fracturing channel (62) which is communicated with the axis inside the fracturing pipe (3), a capsule water injection channel (63) is further arranged outside the axis inside the fracturing pipe (3), the upper end of the capsule water injection channel (63) extends to the side wall of one side of the upper connecting boss (60), and the lower end of the capsule water injection channel (63) extends to the side wall of one side of the lower connecting boss (61); a plurality of radial water outlet holes (64) are formed in the fracturing pipe (3), and the radial water outlet holes (64) are communicated with the outside of the fracturing pipe (3) and the fracturing channel (62); go up connection boss (60) and pass through screw-thread fit and fixed mounting in lower mounting hole A (59), connect boss (61) down and pass through screw-thread fit and fixed mounting in last mounting hole B (67), and when fracturing pipe (3) and lower hole packer (1) and last hole packer (2) fastening connection state, the lower extreme of capsule water injection passageway (63) is linked together with the upper end of drainage channel B (48), the upper end of capsule water injection passageway (63) and the lower extreme intercommunication of drainage channel A (53).
2. The drilling and fracturing integrated hole sealing device for the coal roadway according to claim 1, wherein the upper connecting boss (60) is provided with an annular groove A at the upper part and the lower part of the upper end of the capsule water injection channel (63), and a sealing ring A is arranged in the annular groove A; the lower connecting boss (61) is provided with an annular groove B respectively at the upper part and the lower part of the lower end of the capsule water injection channel (63), and a sealing ring B is arranged in the annular groove B.
3. The drilling and cracking integrated hole sealing device suitable for the coal roadway is characterized in that the opening pressure of the second spring (35) is 4 MPa; the opening pressure of the first spring (30) is 16 MPa; the opening pressure of the third spring (57) is 4 MPa.
4. The drilling and cracking integrated hole sealing device suitable for the coal roadway is characterized in that the interval between the lower metal shell (4) and the side wall of the lower packing capsule (5) and the interval between the upper metal shell (36) and the side wall of the upper packing capsule (37) are both 0.5 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011638433.1A CN112761567B (en) | 2020-12-31 | 2020-12-31 | Drilling and cracking integrated hole sealing device suitable for coal roadway and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011638433.1A CN112761567B (en) | 2020-12-31 | 2020-12-31 | Drilling and cracking integrated hole sealing device suitable for coal roadway and using method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112761567A CN112761567A (en) | 2021-05-07 |
| CN112761567B true CN112761567B (en) | 2022-01-04 |
Family
ID=75698315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011638433.1A Active CN112761567B (en) | 2020-12-31 | 2020-12-31 | Drilling and cracking integrated hole sealing device suitable for coal roadway and using method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112761567B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309510B (en) * | 2021-06-18 | 2022-05-20 | 中国矿业大学 | Device is peeied at with real-time fixed drilling of quick assembly disassembly |
| CN114198024B (en) * | 2021-11-02 | 2024-03-15 | 长江岩土工程有限公司 | Positioning device for deep water drilling sleeve |
| CN114151057B (en) * | 2021-12-08 | 2023-08-04 | 安徽理工大学 | Coal rock drilling high-pressure hydraulic fracturing experimental device and application method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071921A (en) * | 2010-12-30 | 2011-05-25 | 河南理工大学 | Underground drilling and fracturing-integrated staged fracturing device and gas drainage process |
| CN102287163A (en) * | 2011-09-08 | 2011-12-21 | 重庆市能源投资集团科技有限责任公司 | Drilling-sealing method and sealing device of coal mine underground ultrahigh pressure fracturing hole |
| CN209083252U (en) * | 2018-09-20 | 2019-07-09 | 中国矿业大学 | A kind of brill downhole explosion and water filling or fracturing integrated hole packer |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2550840A1 (en) * | 2006-06-23 | 2007-12-23 | Frac Source Inc. | Shock-release fluid fracturing method and apparatus |
| US9091121B2 (en) * | 2011-12-23 | 2015-07-28 | Saudi Arabian Oil Company | Inflatable packer element for use with a drill bit sub |
| CN108561083B (en) * | 2018-03-09 | 2021-05-18 | 中国矿业大学 | Long-distance drilling and fracturing integrated equipment and method under mine |
| CN108757000B (en) * | 2018-04-12 | 2019-09-24 | 山东科技大学 | A kind of quick slot orientation fracturing system in underground based on drilling machine power and method |
| CN109113637A (en) * | 2018-09-20 | 2019-01-01 | 中国矿业大学 | A kind of brill downhole explosion and water filling or fracturing integrated hole packer and construction method |
| CN109469479B (en) * | 2018-11-30 | 2023-07-14 | 天地科技股份有限公司 | Hydraulic fracturing ground stress measurement system and method |
| CN110439497B (en) * | 2019-07-31 | 2024-05-10 | 中国矿业大学 | Drilling multi-section plugging, fracturing, grouting and water injection integrated equipment and use method |
| CN110984940A (en) * | 2019-11-05 | 2020-04-10 | 煤炭科学技术研究院有限公司 | Single-pipeline pressure regulating type double-end plugging fracturing device and fracturing method |
| CN111425175B (en) * | 2020-04-02 | 2022-03-25 | 西安科技大学 | Coal rock stratum high-pressure hole sealing pressure relief protection method |
-
2020
- 2020-12-31 CN CN202011638433.1A patent/CN112761567B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071921A (en) * | 2010-12-30 | 2011-05-25 | 河南理工大学 | Underground drilling and fracturing-integrated staged fracturing device and gas drainage process |
| CN102287163A (en) * | 2011-09-08 | 2011-12-21 | 重庆市能源投资集团科技有限责任公司 | Drilling-sealing method and sealing device of coal mine underground ultrahigh pressure fracturing hole |
| CN209083252U (en) * | 2018-09-20 | 2019-07-09 | 中国矿业大学 | A kind of brill downhole explosion and water filling or fracturing integrated hole packer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112761567A (en) | 2021-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112761567B (en) | Drilling and cracking integrated hole sealing device suitable for coal roadway and using method | |
| CN216008869U (en) | Fluid end and plunger pump | |
| CN113898574A (en) | Gland, hydraulic end and plunger pump | |
| CN113790151A (en) | Fluid end and plunger pump | |
| CN201795899U (en) | End sealing ring of steel pipe for steel pipe pressure test equipment | |
| CN209924950U (en) | Drilling tool blowout prevention valve with liquid flow impact resistance and liquid flow erosion resistance | |
| CN104806200A (en) | Plunger-type double-passage different-direction synchronous joint control check valve for double-layer continuous oil pipe | |
| CN113882855A (en) | Plug-in type high-low pressure accurate switching slotting device, slotting device and using method | |
| CN109779543B (en) | Expansion pipe pressurization system | |
| CN110056327B (en) | Multi-channel hole sealing device, hole sealing assembly and automatic hole sealing method | |
| CN104154066A (en) | Pile-up valve for recovering energy of excavator | |
| CN216477319U (en) | Plug-in type high-low pressure accurate switching slotting device and slotting device | |
| CN107831062B (en) | High-pressure hole internal drainage pressure relief hydraulic grouting and pressurized water test plug | |
| CN113914819A (en) | Hydraulic sliding sleeve for fracturing | |
| CN204041606U (en) | A kind of be used for excavator energy regenerating and recycling and can antioverloading integrated valve | |
| CN210714586U (en) | Self-checking mechanical water plugging pipe column | |
| CN104213848A (en) | Arc sealing device for pipeline or drill pipe hole forming under pressure and using method | |
| CN210152612U (en) | Drilling rod conversion equipment that punches a hole for coal mine | |
| CN204627541U (en) | The incorgruous synchronous joint control ball-and-seat of double layer continuous oil pipe plunger type double-channel | |
| CN209179741U (en) | Anti-backflow linker | |
| CN111379536B (en) | Packer (CN) | |
| CN211370347U (en) | Novel liquid releasing device | |
| CN112483028A (en) | Quick control device for releasing clamping of under-pressure reversing in well | |
| CN212536294U (en) | Drilling cylinder pressure supply device with servo valve and pressure increasing valve | |
| CN203978983U (en) | A kind of integrated valve that reclaims and have antioverloading function for excavator energy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |