CN113863879A - Gas reverse circulation is diverging device for well drilling - Google Patents
Gas reverse circulation is diverging device for well drilling Download PDFInfo
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- CN113863879A CN113863879A CN202010607513.4A CN202010607513A CN113863879A CN 113863879 A CN113863879 A CN 113863879A CN 202010607513 A CN202010607513 A CN 202010607513A CN 113863879 A CN113863879 A CN 113863879A
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- 238000005553 drilling Methods 0.000 title claims abstract description 46
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000000956 alloy Substances 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 230000001154 acute effect Effects 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Classifications
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- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
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- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
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- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a gas reverse circulation well drilling flow dividing device, which comprises an upper joint, a locking sleeve, a rubber ring, an inner pipe, a lower joint and a flow guide body, wherein: the upper joint and the lower joint are connected to form a hollow pipe column body; the middle lower part of the lower joint is of a reducing structure, and the middle part of the lower joint is provided with a plurality of through holes A; the rubber ring is sleeved on the upper joint; after the locking sleeve is connected with the upper joint, the rubber ring is limited between the locking sleeve and the lower joint; the flow guide body is of a cylindrical structure and is sleeved in the lower connector, the flow guide body is provided with a through hole B corresponding to the circumferential through hole A of the lower connector, the cylinder wall of the flow guide body is axially provided with a plurality of through holes C which are vertically communicated, the through holes C are arranged among the circumferential intervals of the through holes B, and the lower end of the flow guide body is hermetically connected with the lower connector; the inner tube is arranged in the hollow tubular column body of the upper joint and the lower joint, the lower end of the inner tube is in sealing connection and matching with the opening end of the flow guide body, and the inner tube is communicated with the through hole C of the flow guide body downwards. The device is soft contact with the well hole, can better shutoff well hole, when falling the piece, can avoid the sticking of a drill moreover.
Description
Technical Field
The invention relates to the field of drilling devices, in particular to a gas reverse circulation well drilling flow dividing device.
Background
The method of drilling by circulating medium from the bottom of the well to carry the cuttings from the center of the drill pipe back to the surface is called reverse circulation center sampling drilling. Single, double or triple layer drill pipes are commonly used, but double wall drill pipes are most common. The circulating medium is pressed in by the annulus between the double pipes and returns from the center of the inner pipe carrying the rock debris, so the method is called double-pipe reverse circulation or double-wall drill pipe reverse circulation drilling. With the continuous innovation of the reverse circulation drilling theory and the drilling process, the reverse circulation drilling technology is more and more widely applied to the fields of mineral exploration, water well drilling, oil drilling and the like. The positive and negative alternative gas reverse circulation well drilling technology belongs to a form of reverse circulation well drilling, and compared with an oil drilling machine, the newly added equipment mainly comprises a gas box, a double-wall drill rod and an underground plugging diverter; the drilling tool structure generally comprises a water tap, a gas box, a double-wall drilling tool, an underground plugging diverter, a conventional drilling tool and a drill bit; in the drilling process, compressed air enters an annular space of the double-wall drill rod through the air box (namely, an annular space is formed by the inner drill rod and the outer drill rod), enters the conventional drill rod along the annular space and then reaches a drill bit; the gas returning from the drill bit carries the rock debris to enter the flow dividing device through an annular space between the conventional drill rod and the well hole, then enters an inner drill rod of the double-wall drill rod, and finally returns to the ground. In order to enable the rock-carrying gas returned from the drill bit to enter the inner drill rod of the upper double-wall drill rod after passing through the shunt device, the outer diameter of the current shunt device is generally close to the size of a well hole and is made of all metal materials. But the outer diameter is close to the size of the well hole, and when the upper well wall has larger dropping blocks and falls off, the drill jamming is easily caused at the diverter.
Disclosure of Invention
The invention aims to solve the problem that the conventional flow dividing device is easy to cause drill sticking, and provides a flow dividing device for gas reverse circulation drilling.
The technical scheme is as follows:
the utility model provides a gas reverse circulation diverging device for well drilling, includes top connection, lock sleeve, rubber ring, inner tube, lower clutch and baffle, wherein:
the upper end of the upper joint is provided with a joint connected with a double-wall drill rod, and the lower end of the upper joint is connected with a lower joint to form a hollow pipe column body;
the upper end part of the lower joint is of an expanding boss structure, the middle lower part of the lower joint is of a reducing structure, the lower end of the lower joint is provided with a joint connected with a drilling tool, and the middle part of the lower joint is circumferentially provided with a plurality of through holes A;
the rubber ring is sleeved on the upper joint above the lower joint expanding boss structure;
after the locking sleeve is connected and matched with the upper joint, the rubber ring is limited between the locking sleeve and the lower joint;
the flow guide body is sleeved in the lower connector, the flow guide body is of a cylindrical structure with a closed bottom, a through hole B corresponding to the circumferential through hole A of the lower connector is arranged in the middle of the flow guide body, a plurality of through holes C which are vertically communicated are axially arranged on the wall of the flow guide body, the through holes C are arranged among the circumferential intervals of the through holes B, and the lower end of the flow guide body is in sealing connection and matching with the lower connector;
the inner pipe is arranged in the hollow pipe column body of the upper joint and the lower joint, the joint connected with the inner pipe of the double-wall drill pipe is arranged at the upper end of the inner pipe, the outer part of the joint is connected with the upper joint through a support, the lower end of the joint is in sealing connection and matching with the hole opening end at the upper part of the flow guide body, the inner pipe, the upper joint and the inner pipe wall of the lower joint form an annular space, and the annular space is communicated with the annular space between the inner pipe and the outer pipe of the double-wall drill pipe upwards and is communicated with the through hole C of the flow guide body downwards.
The above scheme further comprises:
the rubber ring is sleeved on the upper joint through a locking mechanism.
The locking mechanism includes: go up compensation dish, fastening bolt, steel ring, pressure disk and lower compensation dish, wherein:
the joint surfaces of the upper compensation plate and the locking sleeve and the lower compensation plate and the lower connector are matched through keys and key grooves; the rubber rings are arranged in a multistage axial mode and are respectively sleeved on the pressure plate; the steel ring is arranged in the pressure plate and connected with the pressure plate through a fastening bolt; the multistage rubber ring is limited between the upper compensation disc and the lower compensation disc after being sequentially connected through the pressure disc, the steel ring and the fastening bolt.
The involution surfaces among the pressure plates of the multistage rubber rings, between the upper compensation plate and the pressure plate and between the lower compensation plate and the pressure plate are all arranged and sequentially locked through the round holes C and the cylinders.
The pressure disk internal surface is equipped with a plurality of rectangular channels along circumference equipartition, sets up carbide strip in the rectangular channel.
The upper end and the lower end of the upper joint and the lower joint are both provided with threads; the through holes A of the lower joint are symmetrically arranged, and the included angle between the axis of the through hole A and the axis of the flow guide body through hole B corresponding to the through hole A and the axis of the lower joint is an acute angle.
The lower joint inner wall and the diversion body outer wall joint part are in a step shape, two key grooves C are symmetrically arranged on the minimum inner cylindrical surface of the lower end, and the lower end of the diversion body and the lower joint are connected together in a key and key groove mode.
The upper end of the flow guide body is limited by an elastic retainer ring; the lower end of the inner pipe is connected with the flow guide body through threads.
The invention has the beneficial effects that: the device is in soft contact with the well hole, so that the well hole can be better plugged, more gas carrying rock debris enters the inner drill rod of the double-wall drill rod, and drill jamming can be avoided when a block falls; the rubber ring and the pressure plate can rotate independently of the upper joint, and the abrasion of the rubber ring can be reduced.
Drawings
FIG. 1 is a schematic structural diagram of a gas reverse circulation well drilling flow dividing device according to the invention;
FIG. 2 is a cross-sectional view of the upper compensating disc (4) of FIG. 1;
FIG. 3 is a cross-sectional view of the platen (8) of FIG. 1;
FIG. 4 is a cross-sectional view of the lower compensating disc (9) of FIG. 1;
fig. 5 is a front view of the current carrier (9) of fig. 1;
fig. 6 is a right side view of the current carrier (9) of fig. 1;
FIG. 7 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 8 is a cross-sectional view taken at B-B of FIG. 1;
FIG. 9 is a cross-sectional view taken at C-C of FIG. 1;
FIG. 10 is a cross-sectional view taken at D-D of FIG. 1;
fig. 11 is a schematic structural diagram of the gas reverse circulation well drilling flow dividing device in the underground operation.
In the drawings 1-11, 1 is an upper joint, 2 is an inner pipe, 3 is a locking sleeve, 4 is an upper compensating disc, 5 is a rubber ring, 6 is a fastening bolt, 7 is a steel ring, 8 is a pressure plate, 9 is a lower compensating disc, 10 is a lower joint, 11 is a circlip, 12, 13 and 14 is a sealing ring, 15 is a flow guide body, 16 is a hard alloy cylinder, 17 is a hard alloy strip, 21 is an outer drill rod, 22 is an inner drill rod, 23 is an annular gap (also called an annulus), 24 is a well wall, 25 is a conventional drilling tool, 26 is a drill bit, 201 is a key groove A, 401 is a key A, 402 is a circular hole B, 801 is a rectangular groove, 802 and 803 is a circular hole C, 901 is a circular hole D, 902 is a key B, 1001 is a key groove B, 1002 is a through hole A, 1003 is a key groove C, 1501 is a through hole B, 1502C, 1503 is a fan-shaped through hole C.
Detailed Description
The following will be described in further detail with reference to the accompanying drawings.
Example 1
Referring to the attached drawing 1, a gas reverse circulation well drilling flow dividing device comprises an upper connector 1, a locking sleeve 3, a rubber ring 5, an inner pipe 2, a lower connector 10 and a flow guide body 15, wherein:
the upper end of the upper joint 1 is provided with a joint connected with a double-wall drill rod, and the lower end of the upper joint is connected with a lower joint 10 to form a hollow pipe column body;
the upper end part of the lower joint 10 is of an expanding boss structure, the middle lower part of the lower joint 10 is of a reducing structure, the lower end of the lower joint is provided with a joint connected with a drilling tool, and the middle part of the lower joint is circumferentially provided with a plurality of through holes A1002;
the rubber ring 5 is sleeved on the upper joint 1 above the diameter-expanding boss structure of the lower joint 10;
after the locking sleeve 3 is connected and matched with the upper joint 1, the rubber ring 5 is limited between the locking sleeve 3 and the lower joint 10;
referring to fig. 5 and 6, the flow guiding body 15 is sleeved in the lower joint 10, the flow guiding body 15 is a cylindrical structure with a closed bottom, a through hole B1501 corresponding to the circumferential through hole a1002 of the lower joint 10 is arranged in the middle of the flow guiding body 15, a plurality of through holes C1503 penetrating up and down are axially arranged on the wall of the flow guiding body 15, the through holes C1503 are arranged between the circumferential intervals of the through holes B1503, and the lower end of the flow guiding body 15 is in sealing connection and matching with the lower joint;
the inner pipe 2 is arranged in the hollow pipe column body of the upper joint 1 and the lower joint 10, the upper end of the inner pipe 2 is provided with a joint connected with the inner pipe of the double-wall drill pipe, the outside of the joint is connected with the upper joint 1 through a support, the lower end of the joint is in sealing connection and matching with the upper opening end of the flow guide body 15, the inner pipe 2 and the inner pipe wall of the upper joint 1 and the inner pipe wall of the lower joint 10 form an annular space, and the annular space is communicated with the annular space between the inner pipe and the outer pipe of the double-wall drill pipe upwards and is communicated with the through hole C1503 of the flow guide body 15 downwards.
Example 2
With reference to fig. 1 to 10, on the basis of the above embodiment 1, further comprising:
the rubber ring 5 is sleeved on the upper joint 1 through a locking mechanism.
The locking mechanism includes: go up compensation dish 4, fastening bolt 6, steel ring 7, pressure disk 8 and lower compensation dish 9, wherein:
the mating surfaces of the upper compensation disc 4 and the locking sleeve 3, and the mating surfaces of the lower compensation disc 9 and the lower joint 10 are all fixed to be matched through keys and key grooves; the rubber rings 5 are arranged in a multistage axial mode and are respectively sleeved on the pressure plate 8; the steel ring 7 is arranged in the pressure plate 8, and the steel ring 7 is connected with the pressure plate 8 through the fastening bolt 6; the multistage rubber ring 5 is limited between the upper compensation disc 4 and the lower compensation disc 9 after being sequentially connected through a pressure disc 8, a steel ring 7 and a fastening bolt 6.
The involution surfaces between the pressure plates 8 of the multistage rubber rings 5, between the upper compensation plate 4 and the pressure plate 8 and between the lower compensation plate 9 and the pressure plate 8 are all arranged and sequentially locked through a round hole C802 and a cylinder 19.
The inner surface of the pressure plate 8 is provided with a plurality of rectangular grooves 801 which are uniformly distributed along the circumferential direction, and hard alloy strips 18 are arranged in the rectangular grooves.
The upper end and the lower end of the upper joint 1 and the lower joint 10 are both provided with threads; through holes A1002 of the lower joint 10 are symmetrically arranged, and the included angle between the axis of the through holes A1002 and the axis of the through holes B1501 of the corresponding flow guide body 15 and the axis of the lower joint 10 is an acute angle.
The joint of the inner wall of the lower joint 10 and the outer wall of the flow guide body 15 is in a step shape, two key grooves C1003 are symmetrically arranged on the minimum inner cylindrical surface of the lower end, and the lower end of the flow guide body 15 is connected with the lower joint 10 in a key and key groove mode.
The upper end of the flow guide body 15 is limited by an elastic retainer ring 11; the lower end of the inner pipe 2 is connected with the flow guiding body 15 through threads.
Example 3
Fig. 1 is a schematic structural diagram of a gas reverse circulation well drilling flow dividing device, which comprises an upper joint (1), an inner pipe (2), a locking sleeve (3), an upper compensation disc (4), a rubber ring (5), a bolt (6), a steel ring (7), a pressure plate (8), a lower compensation disc (9), a lower joint (10), an elastic retainer ring (11) and a flow guide body (15). Wherein the upper joint (1) and the lower joint (10) are connected together through threads; the inner hole of the locking sleeve (3) is provided with threads, and the outer surface of the lower end of the locking sleeve is provided with a plurality of key grooves A (201); the upper end surface of the upper compensation disc (4) is provided with a plurality of raised keys A (401); the lower end surface of the lower compensation disc (9) is provided with a plurality of raised keys B (902); the outer surface of the upper end of the lower joint (10) is provided with a plurality of key grooves B (1001); the upper compensation plate (4), the pressure plate (8) and the lower compensation plate (9) are sequentially sleeved in the middle of the upper joint (1); the locking sleeve (3) is connected with the upper joint (1) through threads; a raised key A (401) of the upper compensation disc (4) is inserted into a key groove A (301) of the locking sleeve (3); a raised key B (902) of the lower compensation disc (9) is plugged with a key groove B (1001) of the lower joint (10); the rubber ring (5) is sleeved on the pressure plate (8); a steel ring (7) is arranged in the pressure plate (8), and the steel ring (7) is connected with the pressure plate (8) through a fastening bolt (6); the flow guide body (15) is arranged in the lower joint (10), the flow guide body and the lower joint are connected together in a key and key groove mode, and a sealing ring (13) and a sealing ring (14) are arranged between the flow guide body and the lower joint; the upper end of the flow guide body (15) is limited by an elastic retainer ring (11); the inner pipe (2) is arranged in the upper joint (1), the lower end of the inner pipe (2) is connected with the flow guide body (15) through threads, and a sealing ring (12) is arranged between the inner pipe and the flow guide body.
The upper joint (1) is of a hollow structure, threads are arranged at the upper end and the lower end of the upper joint, a plurality of round holes A (101) which are uniformly distributed along the axial direction and the circumferential direction and have certain depth are arranged on the outer cylindrical surface with the largest diameter, and hard alloy cylinders (17) are arranged in the round holes A (101).
The lower joint (10) is of a hollow structure, threads are arranged at the upper end and the lower end of the lower joint, the outer surface of the lower joint is in a step shape, two symmetrical through holes A (1002) are arranged on the outer cylindrical surface with the smallest diameter, and the included angle between the axis of each through hole A (1002) and the axis of the lower joint (10) is an acute angle; the inner hole is in a step shape, and two key grooves C (1003) are symmetrically arranged on the inner cylindrical surface with the smallest diameter.
Fig. 2 shows that the lower end surface of the upper compensation disc (4) is provided with a plurality of circular holes B (402) which are uniformly distributed along the circumferential direction and have a certain depth, and hard alloy cylinders (16) are arranged in the circular holes B (402).
Fig. 3 shows that the upper end surface and the lower end surface of the pressure plate (8) are respectively provided with a plurality of circular holes C (802, 803) which are uniformly distributed along the circumferential direction and have certain depth, and hard alloy cylinders (19) are arranged in the circular holes C (802, 803); the inner surface of the groove is provided with a plurality of rectangular grooves (801) which are uniformly distributed along the circumferential direction, and hard alloy strips (18) are arranged in the rectangular grooves (801).
Fig. 4 shows that the upper end surface of the lower compensation disc (9) is provided with a plurality of circular holes D (901) which are uniformly distributed along the circumferential direction and have a certain depth, and hard alloy cylinders (20) are arranged in the circular holes D (901).
The flow guide body (15) shown in fig. 5 and 6 is a tubular structure with an opening at one end and a closed end, the outer surface is in a step shape, two radial through holes B (1501) are symmetrically arranged on the tube wall, the included angle between the axis of the through hole B (1501) and the axis of the flow guide body (15) is an acute angle, two fan-shaped through holes (1503) in the axis direction are symmetrically arranged on the tube wall, and two keys C (1502) are symmetrically arranged on the outer cylindrical surface with the smallest diameter.
The 4 raised keys a (401) of the upper compensating disc (4) shown in fig. 7 are inserted into the 4 keyways a (301) of the locking sleeve (3).
The 3 raised keys B (902) of the lower compensating disc (9) shown in fig. 8 are inserted into the 3 keyways B (1001) of the lower adapter (10).
Fig. 9 shows that the two through holes a (1002) of the lower joint (10) are in communication with the two through holes B (1501) of the current carrier (15).
Two keys C (1502) of the deflector (15) shown in fig. 10 are inserted into two key grooves C (1003) of the lower joint (10), respectively.
As shown in fig. 11, when the gas reverse circulation well drilling flow dividing device works underground, the structure of the upper and lower pipe strings is as follows: double-wall drill rods (comprising an inner drill rod (22) and an outer drill rod (21), wherein an annular space (23) is arranged between the inner drill rod and the outer drill rod) + a gas reverse circulation well drilling flow dividing device + a conventional drilling tool (25) + a drill bit (26). The upper end of an upper connector (1) of the gas reverse circulation well drilling flow dividing device is connected with an inner drill rod (22) of a double-wall drill rod through threads; in the drilling process, the compressed air at the wellhead enters an annular space (23) of a double-wall drill rod through a gas box to reach the underground, sequentially passes through an annular space formed by an upper connector (1) and an inner pipe (2) of the shunting device for gas reverse circulation drilling and a fan-shaped through hole (1503) of a flow guide body (15), then enters a conventional drilling tool (25), then reaches a drill bit (26), and is discharged by the drill bit (26); because the rubber ring (5) of the shunting device for gas reverse circulation well drilling effectively blocks an annular space between a conventional drilling tool (25) and a well wall (24), most of gas carrying rock debris enters the inner pipe (2) after passing through the two through holes A (1002) of the lower joint (10) and the two through holes B (1501) of the flow guide body (15), then enters the inner part (22) of the double-wall drill rod and finally returns to the ground.
Claims (8)
1. The utility model provides a gas reverse circulation diverging device for well drilling, includes top connection (1), lock sleeve (3), rubber ring (5), inner tube (2), lower clutch (10) and baffle (15), characterized by:
the upper end of the upper joint (1) is provided with a joint connected with a double-wall drill rod, and the lower end of the upper joint is connected with the lower joint (10) to form a hollow pipe column body;
the upper end part of the lower joint (10) is of an expanding boss structure, the middle lower part of the lower joint (10) is of a reducing structure, the lower end of the lower joint is provided with a joint connected with a drilling tool, and the middle part of the lower joint is circumferentially provided with a plurality of through holes A (1002);
the rubber ring (5) is sleeved on the upper joint (1) above the diameter-expanding boss structure of the lower joint (10);
after the locking sleeve (3) is connected and matched with the upper connector (1), the rubber ring (5) is limited between the locking sleeve (3) and the lower connector (10);
the flow guide body (15) is sleeved in the lower connector (10), the flow guide body (15) is of a cylindrical structure with a closed bottom, a through hole B (1501) corresponding to the circumferential through hole A (1002) of the lower connector (10) is formed in the middle of the flow guide body (15), a plurality of through holes C (1503) which are vertically communicated are formed in the cylinder wall of the flow guide body (15) along the axial direction, the through holes C (1503) are formed among the circumferential intervals of the through holes B (1503), and the lower end of the flow guide body (15) is in sealing connection and matching with the lower connector;
the inner pipe (2) is arranged in a hollow pipe column body of the upper joint (1) and the lower joint (10), the upper end of the inner pipe (2) is provided with a joint connected with an inner pipe of the double-wall drill pipe, the outside of the joint is connected with the upper joint (1) through a support, the lower end of the joint is in sealing connection and matching with the upper hole opening end of the flow guide body (15), the inner pipe (2) and the inner pipe walls of the upper joint (1) and the lower joint (10) form an annular space, the annular space is communicated with the annular space between the inner pipe and the outer pipe of the double-wall drill pipe upwards, and is communicated with a through hole C (1503) of the flow guide body (15) downwards.
2. The flow divider for gas reverse circulation drilling according to claim 1, characterized in that the rubber ring (5) is sleeved on the upper joint (1) through a locking mechanism.
3. A flow divider according to claim 2, wherein the locking mechanism comprises: go up compensation dish (4), fastening bolt (6), steel ring (7), pressure disk (8) and lower compensation dish (9), wherein:
the mating surfaces of the upper compensation disc (4) and the locking sleeve (3) and the lower compensation disc (9) and the lower joint (10) are matched through keys and key grooves; the rubber rings (5) are arranged in a multistage axial mode and are respectively sleeved on the pressure plate (8); the steel ring (7) is arranged in the pressure plate (8), and the steel ring (7) is connected with the pressure plate (8) through a fastening bolt (6); the multistage rubber ring (5) is limited between the upper compensation disc (4) and the lower compensation disc (9) after being sequentially connected through a pressure disc (8), a steel ring (7) and a fastening bolt (6).
4. The flow dividing device for gas reverse circulation well drilling according to claim 3, wherein the mating surfaces between the pressure plates (8) of the multistage rubber ring (5), between the upper compensation plate (4) and the pressure plate (8), and between the lower compensation plate (9) and the pressure plate (8) are sequentially locked through a circular hole C (802) and a cylinder (19).
5. A flow divider as claimed in claim 3 for reverse gas circulation drilling, wherein: the inner surface of the pressure plate (8) is provided with a plurality of rectangular grooves (801) which are uniformly distributed along the circumferential direction, and hard alloy strips (18) are arranged in the rectangular grooves.
6. A flow divider according to any of claims 1 to 5 for gas reverse circulation drilling, characterized by: the upper end and the lower end of the upper joint (1) and the lower joint (10) are both provided with threads; through holes A (1002) of the lower joint (10) are symmetrically arranged, and the included angle between the axis of the through holes A (1002) and the axis of the through holes B (1501) of the corresponding flow guide body (15) and the axis of the lower joint (10) is an acute angle.
7. The flow divider for reverse gas circulation drilling according to claim 6, wherein: the joint of the inner wall of the lower joint (10) and the outer wall of the flow guide body (15) is in a step shape, two key grooves C (1003) are symmetrically arranged on the minimum inner cylindrical surface of the lower end, and the lower end of the flow guide body (15) is connected with the lower joint (10) in a key and key groove mode.
8. The flow divider for reverse gas circulation drilling according to claim 6, wherein: the upper end of the flow guide body (15) is limited by an elastic retainer ring (11); the lower end of the inner pipe (2) is connected with the flow guide body (15) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010607513.4A CN113863879B (en) | 2020-06-30 | 2020-06-30 | Gas reverse circulation well drilling is with diverging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010607513.4A CN113863879B (en) | 2020-06-30 | 2020-06-30 | Gas reverse circulation well drilling is with diverging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113863879A true CN113863879A (en) | 2021-12-31 |
| CN113863879B CN113863879B (en) | 2023-07-21 |
Family
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024067533A1 (en) * | 2022-09-30 | 2024-04-04 | 中国石油天然气集团有限公司 | Packer apparatus while drilling and reverse circulation drilling device |
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| WO2024067533A1 (en) * | 2022-09-30 | 2024-04-04 | 中国石油天然气集团有限公司 | Packer apparatus while drilling and reverse circulation drilling device |
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| CN113863879B (en) | 2023-07-21 |
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