CN111550210A - Coring tool for shale oil gas trapping and warm-pressing detection in tripping process - Google Patents
Coring tool for shale oil gas trapping and warm-pressing detection in tripping process Download PDFInfo
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- CN111550210A CN111550210A CN201910061421.8A CN201910061421A CN111550210A CN 111550210 A CN111550210 A CN 111550210A CN 201910061421 A CN201910061421 A CN 201910061421A CN 111550210 A CN111550210 A CN 111550210A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 21
- 239000003079 shale oil Substances 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 238000003825 pressing Methods 0.000 title claims description 5
- 230000007246 mechanism Effects 0.000 claims abstract description 91
- 210000000078 claw Anatomy 0.000 claims abstract description 73
- 238000007789 sealing Methods 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000009826 distribution Methods 0.000 claims abstract description 36
- 238000005553 drilling Methods 0.000 claims abstract description 27
- 210000002445 nipple Anatomy 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 239000011435 rock Substances 0.000 claims description 31
- 239000000725 suspension Substances 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000010008 shearing Methods 0.000 claims description 7
- 238000009530 blood pressure measurement Methods 0.000 claims 1
- 238000009529 body temperature measurement Methods 0.000 claims 1
- 238000003860 storage Methods 0.000 abstract description 21
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 52
- 238000010586 diagram Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
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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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/08—Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure
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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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/10—Formed core retaining or severing 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
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Abstract
The invention relates to a shale oil gas trapping and temperature and pressure detection coring tool in a tripping process. The core-pulling device comprises a differential mechanism, a sliding block mechanism, a water distribution joint assembly, a pressure release valve, an air storage cylinder, an oil-gas trapping assembly, a temperature and pressure measuring short section, a core limiting device, an outer cylinder, an inner cylinder, a clamp type core claw, a sealing flap valve and a core-pulling drill bit. After the tool is put into the well bottom, the circulating drilling fluid cleans the well bottom. After the core drilling is finished, a large steel ball is put into the core drilling machine to suppress the pressure in the drilling tool, and then the drilling tool is lifted to finish the core cutting operation. In the process of tripping, gas is released and gathered in the inner cylinder from the core, the temperature and pressure measuring nipple is responsible for recording the temperature and the pressure value of the inner cylinder, the gas is released to reach a certain pressure and then pushes the piston of the gas storage cylinder to move upwards, the gas quantity exceeds the quantity required by the test and then is automatically released from the pressure release valve, and the temperature and the pressure value of the gas storage cylinder are recorded by the oil storage gas collecting assembly.
Description
Technical Field
The invention relates to the field of petroleum and natural gas exploration and development tools, in particular to a shale oil gas trapping and temperature and pressure detection coring tool in a tripping process.
Background
Along with the increasing of the exploration and development strength of shale oil gas, the requirement on accurate oil gas content description of shale stratum is higher and higher, and exploration and development decision and yield evaluation of shale oil gas are directly influenced, oil gas in a shale core obtained by a traditional coring technology is continuously analyzed and escaped due to pressure change in the process of tripping, according to statistics of foreign data, the oil gas escaping loss amount only in the tripping process reaches 50-60%, and the actual oil gas content of the shale stratum cannot be accurately evaluated by core data obtained on the ground. In addition, the existing pressure-maintaining coring technology adopts a technical method for maintaining the pressure of the bottom hole to seal the core, a high-pressure core barrel needs to be transported on the ground, the core is subjected to post-treatment under pressure, and excessive ground safety accidents occur and are gradually eliminated and abandoned by the same lines at home and abroad; the sealed coring technology can only provide the original formation oil-water saturation by wrapping the isolated core by using sealing fluid, and can not prevent oil gas in the core from escaping by analysis in the process of tripping the drill. Therefore, it is urgently required to research a new coring technology to solve the above technical bottlenecks and difficulties.
Disclosure of Invention
The invention aims to provide a shale oil and gas trapping and temperature and pressure detection coring tool in the tripping process, which aims to solve the problems in the prior art, namely allows 100% of oil and gas escaping from a rock core to be collected in situ in the tripping process under safe working pressure so as to more accurately guide the development decision and production of an oil and gas field.
The technical scheme of the invention comprises the following steps:
a shale oil gas trapping and warm-pressing detection coring tool in the process of tripping comprises a differential mechanism, a slide block mechanism, a water diversion joint assembly, a rock core limiting mechanism, a coring bit, a relief valve, an oil gas trapping assembly and a temperature and pressure measuring nipple; the differential mechanism, the outer barrel and the coring bit are sequentially and fixedly connected to form an outer barrel assembly, the sliding block mechanism, the water diversion joint assembly, the oil gas trapping assembly, the temperature pressure measuring nipple and the coring mechanism are sequentially and fixedly connected to form an inner barrel assembly, an upper joint connected with a drill rod is arranged at the upper part of the differential mechanism, and the inner barrel assembly is arranged inside the outer barrel assembly and is hung on the outer barrel assembly through the sliding block mechanism.
The scheme refinement scheme is as follows:
differential mechanism includes the sill top connection, the sill lower clutch, sealed sliding sleeve and sealing joint, wherein: the upper joint of the tooth ridge and the upper joint of the differential mechanism are integrated, the outer wall of the upper joint of the tooth ridge is axially provided with a tooth ridge groove, the inner wall of the lower joint of the tooth ridge is axially provided with a tooth ridge bulge, the upper joint of the tooth ridge and the lower joint of the tooth ridge are engaged to form axial sliding and circumferential limiting matching, the sealing joint is connected to the lower end of the upper joint of the tooth ridge, the outer diameter of the sealing joint is larger than the minimum inner diameter of the lower joint of the tooth ridge, the upper end surface of the sealing joint and the lower end surface of the lower joint of the tooth ridge form blocking matching, and the sealing sliding sleeve is connected to the lower;
slider mechanism includes interior positioning joint, ball seat sliding sleeve, positioning joint, pressure-bearing joint and shear pin, wherein: the upper end of the inner positioning joint is connected with a sealing joint of the differential mechanism, the ball seat sliding sleeve is arranged in an annular groove in the inner positioning joint and forms axial interval sealing sliding fit with the inner positioning joint, the ball seat is arranged at the upper end of the ball seat sliding sleeve, the lower end part of the ball seat sliding sleeve is connected with the inner positioning joint through a radially arranged shearing pin, the positioning joint is sleeved outside the inner positioning joint, the upper end of the positioning joint is connected with the sealing sliding sleeve of the differential mechanism, and the inner positioning joint is hung on the positioning joint through the matching of a locking block and;
divide water swivel assembly to include and divide water swivel and end cap, wherein: the upper end of the water distribution joint is connected with a ball seat sliding sleeve of the sliding block mechanism, the lower end of the water distribution joint is plugged by a plug, the middle section of the water distribution joint is radially provided with a plurality of shunting holes, and the shunting holes are communicated with annular gaps between the outer barrel assembly and the inner barrel assembly below the shunting holes;
the oil gas entrapment assembly includes gas receiver and top-down sets gradually relief valve, gas receiver upper cover, piston rod and the gas receiver lower cover in the gas receiver, wherein: the upper part of the air cylinder is connected with the lower end of the water distribution joint, the piston rod is arranged between the upper cover of the air cylinder and the lower cover of the air cylinder, the upper cover of the air cylinder and the lower cover of the air cylinder are communicated with the external space through the central hole of the piston rod, the piston rod and the inner wall of the air cylinder form axial sealing sliding fit, the pressure release valve is connected with the upper cover of the air cylinder and communicated with the central hole of the piston rod, an air exhaust hole is arranged on the air cylinder 5 corresponding to the pressure release valve, the lower cover of the air cylinder is provided with an air inlet hole communicated with the piston cavity at the lower part of the;
the temperature and pressure measuring short section comprises an instrument bin, a temperature sensor, a pressure sensor and a battery, wherein the temperature sensor and the pressure sensor and the battery are assembled in the instrument bin, and are tightly pressed and sealed by an instrument bin cover plate;
the core taking mechanism comprises a core barrel, a core taking inner barrel, a clamp type core claw and a fully-closed valve type core claw, wherein the core barrel is arranged in the core barrel, and a drilling fluid flow channel is arranged between the core barrel, the outer barrel assembly and a core taking drill bit.
The above scheme further comprises:
the clamp type core claw comprises a core claw short section, a core claw, a necking sleeve and a blocking sleeve, wherein the upper part of the core claw short section is connected with a core barrel, the core claw short section and the necking sleeve are sequentially connected, the core claw is arranged in the necking sleeve, and the upper part of the core claw is in limit fit with the core claw short section; the totally closed valve type core claw comprises a valve core claw and a centering sleeve, the valve core claw consists of a valve clack and a torsion spring, the centering sleeve is arranged in an inner cavity of the coring bit, and the shielding sleeve is inserted into the valve core claw to limit the valve clack.
The temperature and pressure measuring short section comprises an upper instrument bin and a lower instrument bin which are oppositely assembled and connected through a connecting loop, and a temperature and pressure sensor and a battery are respectively assembled in the two instrument bins and are compressed and sealed by an instrument bin cover plate; the two instrument bins are axially provided with air guide holes, and the air guide holes are connected with one-way valves through high-pressure hoses.
A low-pressure one-way valve is arranged in the air guide hole of the instrument bin below the lower part.
And a rock core limiting mechanism is arranged between the water distribution joint assembly and the coring mechanism.
The upper end of the rock core limiting mechanism is connected with the instrument bin, the lower end of the rock core limiting mechanism is connected with the rock core barrel, and a rock core baffle is arranged in the middle of the rock core limiting mechanism.
The water distribution joint assembly further comprises a bearing box, a suspension mandrel, a thrust bearing and a bearing support, the upper end of the bearing box is connected with a pressure-bearing joint of the sliding block mechanism, the thrust bearing is sleeved outside the suspension mandrel and then connected with the upper end of the water distribution joint, the upper portions of the suspension mandrel, the thrust bearing and the water distribution joint are arranged in the bearing box, and after the lower end of the upper end of the bearing box is connected with the bearing support, the bearing support and the thrust bearing form axial limiting.
The lower end of an inner positioning joint of the sliding block mechanism is connected with a pressure-bearing joint, the upper end of the pressure-bearing joint is provided with a bulge, the bulge and a sliding groove outside the ball seat sliding sleeve form axial limiting fit, and the lower end of the ball seat sliding sleeve is connected with the pressure-bearing joint through a shearing pin arranged in the radial direction.
The oil gas trapping assembly further comprises an exhaust hole arranged on the upper cover of the air cylinder, the exhaust hole is matched and sealed with the exhaust pin and the gasket, a piston rod is arranged on the central shaft of the upper cover of the air cylinder and the central shaft of the lower cover of the air cylinder, and the piston rod form axial sealing sliding fit.
The working principle of the invention is as follows: and after the coring tool is put into the well bottom, circulating the drilling fluid to clean the well bottom. After the core drilling is finished, a large steel ball is put into the core drilling machine to suppress the pressure in the drilling tool, and the ball seat is pushed to move downwards to cut off the shear pin on the sliding block mechanism, so that the inner barrel assembly and the outer barrel assembly are disconnected. At the moment, the inner cylinder assembly is lifted, the core claw of the flap valve is kept still, the inner cylinder of the core moves upwards along with the sliding block mechanism and the differential mechanism, the core is cut by the hoop type core claw, and the core moves upwards along with the inner cylinder of the core. And when the core inner cylinder moves upwards to a certain position, the flap type sealing valve is exposed out of the side wall of the core inner cylinder and is ejected to the bottom under the action of the spring to seal the bottom of the core inner cylinder, so that the lower part is sealed. In the process of tripping, gas is released and gathered in the temperature and pressure measuring nipple from the rock core, the temperature and the pressure value are recorded, the gas release pushes the piston of the gas storage cylinder to move upwards after reaching certain pressure, the gas quantity exceeds the quantity required by the test and then is automatically released from the pressure release valve, and the temperature and the pressure value of the gas storage cylinder are recorded by the temperature and pressure measuring nipple.
The invention has the advantages that: a totally-closed valve is adopted, the core is closed in the core barrel after core cutting, and gas, liquid and the like released by the core are closed in the inner barrel assembly, so that the aim of isolating the core from drilling fluid in the well is fulfilled; the temperature and pressure change conditions of the core can be measured and recorded by the temperature and pressure measuring nipple in real time; shale gas released by the shale core is collected by the gas storage cylinder, and the releasing process can be indirectly reflected by recording the measured temperature and pressure change conditions in real time through the temperature and pressure measuring short joint; the air storage cylinder is provided with a pressure relief valve, so that the pressure is automatically relieved after the air quantity meets the experimental requirements, and the safety and the reliability are realized; the sliding block mechanism is adopted, and after coring drilling is finished, the drilling fluid is suppressed to cut the core, so that the application range of the tool is not limited by well deviation; the core limiting device is arranged, and after the inner cylinder is filled with the core, normal release of gas can be guaranteed, and the gas guide hole of the upper mechanism is not blocked.
Drawings
FIG. 1 is a schematic structural diagram of a shale oil gas trapping and temperature pressure detection coring tool in a tripping process.
Fig. 2a is an enlarged schematic view of a differential mechanism.
Fig. 2b is an enlarged sectional view of the differential mechanism a-a in fig. 2 a.
Fig. 3a is an enlarged structural schematic diagram of a slider mechanism.
Fig. 3B is an enlarged structural diagram of a section B-B of the sliding block mechanism in fig. 3 a.
Fig. 4 is an enlarged structure schematic diagram of a water diversion assembly.
Fig. 5 is a partially enlarged schematic view of an air cylinder.
Fig. 6 is an enlarged schematic view of a temperature and pressure measuring section.
FIG. 7 is an enlarged view of a portion of a coring mechanism and coring bit.
Fig. 8 is an enlarged structural schematic diagram of a jaw portion of a collar-type core.
Fig. 9 is an enlarged structural schematic view of a claw part of a fully-closed petal type core.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Example 1:
referring to the attached figure 1, the shale oil gas trapping and temperature and pressure detecting coring tool in the drilling process comprises a differential mechanism 1, a sliding block mechanism 2, a water distribution joint assembly 3, a pressure release valve 4, an oil gas trapping assembly 6, a temperature and pressure measuring short joint 7, an outer cylinder 9, an inner cylinder 10, a clamp type core claw 11, a fully-closed valve type core claw 12 and a coring drill bit 13. The differential mechanism 1, the outer cylinder 9 and the coring bit 13 are fixedly connected in sequence to form an outer cylinder assembly, the sliding block mechanism 2, the water diversion joint assembly 3, the oil gas trapping assembly 6, the temperature and pressure measuring pup joint 7, the inner cylinder 10, the clamp type core claw 11 and the fully-closed valve type core claw 12 are fixedly connected in sequence to form an inner cylinder assembly, the upper part of the differential mechanism 1 is provided with an upper joint connected with a drill rod, and the inner cylinder assembly is arranged in the outer cylinder assembly and hung on the outer cylinder assembly through the sliding block mechanism 2.
The objects of the present invention can be basically achieved by the respective portions mentioned in embodiment 1 by means of existing devices or mechanisms.
Example 2:
on the basis of example 1, the further refinement scheme is as follows:
referring to the attached figure 2, the differential mechanism 1 mainly comprises an upper jaw joint 1-1, a lower jaw joint 1-2, a sealing sliding sleeve 1-3 and a sealing joint 1-4 which are connected through threads. Wherein: the upper joint 1-1 of the tooth ridge and the upper joint of the differential mechanism are integrated, the outer wall of the upper joint 1-1 of the tooth ridge is axially provided with a tooth ridge groove, the inner wall of the lower joint 1-2 of the tooth ridge is axially provided with a tooth ridge bulge, the upper joint 1-1 of the tooth ridge and the lower joint 1-2 of the tooth ridge are meshed to form axial sliding and circumferential limiting matching (similar to keyway matching, the upper and lower strokes meet the condition that the inner core barrel at the bottom is lifted up to be separated from the constraint of a core claw 12-1 of a flap valve), the sealing joint 1-4 is connected at the lower end of the upper joint 1-1 of the tooth ridge, the outer diameter of the sealing joint 1-4 is larger than the minimum inner diameter of the lower joint 1-2 of the tooth ridge, the upper end surface of the sealing joint 1-4 and the lower end surface of the lower joint, and forms an axial sliding sealing fit with the sealing joints 1-4.
Referring to the attached figure 3, the sliding block mechanism 2 mainly comprises an inner positioning joint 2-1, a pin shaft 2-2, a ball seat 2-4, a ball seat sliding sleeve 2-5, a positioning joint 2-6, a pressure bearing joint 2-7 and a shearing pin 2-8. Wherein: the upper end of the inner positioning joint 2-1 is connected with a sealing joint 1-4 of a differential mechanism, a ball seat sliding sleeve 2-5 is arranged in an annular groove arranged in the inner positioning joint 2-1, the ball seat sliding sleeve 2-5 is provided with a ball seat 2-4 at the upper end, the lower end of the ball seat sliding sleeve 2-5 is connected with the inner positioning joint 2-1 through a shear pin 2-8 arranged radially, the positioning joint 2-6 is sleeved outside the inner positioning joint 2-1, the upper end of the positioning joint 2-6 is connected with a sealing sliding sleeve 1-3 of a differential mechanism, the inner positioning joint 2-1 is hung on the positioning joint through a locking block 2-10 and a locking pin 2-2 in a matching mode, and the lower end of the ball seat sliding sleeve 2-5 is connected with a water distribution joint assembly 3 through threads.
Referring to the attached figure 4, the water distribution joint assembly 3 mainly comprises a bearing box 3-1, a suspension mandrel 3-2, a thrust bearing 3-3, a bearing support 3-4, a water distribution joint 3-5 and a plug 3-6, wherein the upper end of the bearing box 3-1 is connected with a ball seat sliding sleeve 2-5 in a sliding block mechanism through threads, the suspension mandrel 3-2 is connected with the water distribution joint 3-5 through threads after being sleeved with the thrust bearing 3-3 and is arranged in the bearing box 3-1, and the lower end of the bearing box is limited through the bearing support 3-4. And the lower ends of the water distribution connectors 3-5 are plugged by plugs 3-6, so that the drilling fluid flows out to the annular space of the inner barrel and the outer barrel through the flow distribution holes of the water distribution connectors.
Referring to the attached figure 5, the oil gas trapping assembly comprises a gas storage device 5, and a pressure release valve 4, an upper gas storage device cover 6-3, a piston 6-6, a piston rod 6-5 and a lower gas storage device cover 6-7 which are sequentially arranged in the gas storage device 5 from top to bottom. Wherein, the upper part of the air cylinder 5 is connected with the water distribution joint 3-5 through threads, and the lower part is connected with the temperature and pressure measuring nipple 7 through threads. A piston rod 6-5 is arranged between an upper cover 6-3 of the air cylinder and a lower cover 6-8 of the air cylinder, the upper cover 6-5 of the air cylinder and the lower cover 6-8 of the air cylinder are communicated with the external space through a central hole of the piston rod 6-5, the piston 6-6, the piston rod 6-5 and the inner wall of the air cylinder 5 form axial sealing sliding fit, a pressure relief valve 4 is connected with the upper cover 6-3 of the air cylinder and is communicated with the central hole of the piston rod 6-5, an air vent hole is arranged on the air cylinder 5 corresponding to the pressure relief valve, the lower cover 6-8 of the air cylinder is provided with an air inlet hole communicated with a piston cavity at the lower part of the piston, an air vent hole is arranged on the upper cover 6-3 of
Referring to the attached figure 6, the temperature and pressure measuring nipple 7 is in threaded connection through a connecting loop 7-6 by two pairs of oppositely assembled instrument bins 7-1. The instrument bin 7-1 is internally provided with a temperature and pressure measuring sensor 7-2 and a battery 7-3 and is compressed and sealed by an instrument bin cover plate 7-4. The instrument bin group is directly connected with the one-way valve 7-7 through a high-pressure hose 7-5 and a sealing thread. The upper part of the instrument bin 7-1 is in threaded connection with the air storage cylinder 5 through threads, the lower end of the instrument bin is in threaded connection with a core barrel (also called an inner barrel) 10, and an air guide hole is axially formed in the instrument bin 7-1 and is communicated with the upper space and the lower space of the instrument bin 7-1;
referring to the attached figure 7, the core taking mechanism comprises a core 10, a core taking inner cylinder, a clamp type core claw 11 and a fully closed valve type core claw 12, wherein the core taking inner cylinder, the clamp type core claw and the fully closed valve type core claw are arranged in the core cylinder 10, and a drilling fluid flow passage 13-1 is arranged among the core cylinder 10, an outer cylinder assembly and a core taking drill bit 13.
Example 3: the method further comprises the following steps on the basis of the embodiment 2:
referring to the attached figure 8, the clamp type core claw 11 mainly comprises a core claw short section 11-1, a core claw 11-2, a necking sleeve 11-3 and a blocking sleeve 11-4. The upper part of the core claw short section 11-1 is connected with the core barrel 10 through threads, the core claw short section 11-1, the necking sleeve 11-3 and the blocking sleeve 11-4 are sequentially formed through threads, the core claw 11-2 is placed inside the necking sleeve 11-3, and the upper part is limited by the core claw short section 11-1. The shielding sleeve 11-4 plays a shielding role on the fully-closed petal type core claw 12.
Referring to the attached figure 9, the fully-closed flap type core claw 12 is partially composed of a flap valve core claw 12-1 and a centering sleeve 12-2, and the flap valve core claw 12-1 is composed of a valve flap 12-3 and a torsion spring 12-4. The centering sleeve 12-2 is arranged in the inner cavity of the coring bit 13 and plays a role in centering, and the shielding sleeve 11-4 is inserted into the valve core claw 12-1 to limit the valve clack 12-3.
Example 4: further on the basis of the above example 3: a rock core limiting mechanism 8 is arranged between the water distribution joint assembly 3 and the coring mechanism, the upper end of the rock core limiting mechanism 8 is connected with the instrument bin 7-1, the lower end of the rock core limiting mechanism is connected with a rock core barrel 10, and a rock core baffle is arranged in the middle of the rock core limiting mechanism.
Exemplary embodiment 5:
referring to the attached figure 1, the shale oil gas trapping and temperature and pressure detection coring tool in the drilling process comprises a differential mechanism 1, a sliding block mechanism 2, a water distribution joint assembly 3, a pressure release valve 4, an air storage cylinder 5, an oil gas trapping assembly 6, a temperature and pressure measuring nipple 7, a rock core limiting device 8, an outer cylinder 9, an inner cylinder 10, a clamp type rock core claw 11, a fully-closed petal type rock core claw 12 and a coring drill bit 13.
The upper part of the differential mechanism is provided with a drill rod buckle for connecting the upper drilling tool assembly.
The differential mechanism 1, the outer cylinder 9 and the coring bit 13 are sequentially connected in a threaded manner to form an outer cylinder assembly string, and the slider mechanism 2, the water distribution joint 3, the oil gas trapping assembly 6, the temperature and pressure measuring nipple 7, the rock core limiting device 8, the inner cylinder (also called a rock core cylinder) 10, the clamp type rock core claw 11 and the totally-closed valve type rock core claw 12 are sequentially connected in a threaded manner to form an inner cylinder assembly string, are placed inside the outer cylinder assembly string and are suspended on the outer cylinder assembly by means of the slider mechanism 2.
Referring to fig. 2, the differential mechanism 1 is composed of an upper jaw joint 1-1, a lower jaw joint 1-2, a sealing sliding sleeve 1-3 and a sealing joint 1-4, and is connected through threads. The upper jaw joint 1-1 and the lower jaw joint 1-2 are designed with jaw meshing parts for bearing the torque of the drilling tool, and sealing elements 1-5 are pressed between the sealing sliding sleeves 1-3 and the sealing joints 1-4. The outer diameter of the sealing part of the sealing joint 1-4 is larger than the inner diameter of the lower joint 1-2 of the dental sill, and the sealing joint 1-4 plays a limiting role after the meshing part of the dental sill extends.
Referring to fig. 3, the sliding block mechanism 2 is composed of an inner positioning joint 2-1, a pin shaft 2-2, a ball seat 2-4, a ball seat sliding sleeve 2-5, a positioning joint 2-6, a pressure bearing joint 2-7 and a shearing pin 2-8. The inner positioning joint 2-1 and the ball seat sliding sleeve 2-5 are arranged inside the positioning joint 2-6 and are hung on the positioning joint 2-6 by means of the locking block 2-10. The inner positioning connector 2-1 is provided with 3 locking block holes which are matched with the 3 locking blocks 2-10 and connected by a pin shaft 2-2. The ball seat 2-4 and the ball seat sliding sleeve 2-5 are arranged in an inner cavity formed by the inner positioning joint 2-1 and the pressure-bearing joint 2-7, and the ball seat sliding sleeve 2-5 and the pressure-bearing joint 2-7 are connected by a pin 2-8 and press the sealing element 2-9. The ball seat 2-4 and the inner positioning joint 2-1 directly press the sealing element 2-3. The lower end of the ball seat sliding sleeve 2-5 is connected with the water diversion connector assembly 3 through threads.
Referring to fig. 4, the water distribution joint assembly is composed of a bearing box 3-1, a suspension mandrel 3-2, a thrust bearing 3-3, a bearing support 3-4, a water distribution joint 3-5 and a plug 3-6, wherein the upper end of the bearing box 3-1 is connected with a ball seat sliding sleeve 2-5 in a sliding block mechanism through threads, the suspension mandrel 3-2 is connected with the water distribution joint 3-5 through threads after being sleeved with the thrust bearing 3-3 and is arranged in the bearing box 3-1, and the lower end of the bearing box is limited through the bearing support 3-4. And the lower ends of the water distribution connectors 3-5 are plugged by plugs 3-6, so that the drilling fluid flows out to the annular space of the inner barrel and the outer barrel through the flow distribution holes of the water distribution connectors.
Referring to fig. 5, the upper part of an air storage cylinder 5 of the oil gas trapping assembly 6 is connected with the water diversion connector assembly 3 through threads, and the lower part of the air storage cylinder is connected with the temperature and pressure measuring nipple 7 through threads. The pressure release valve 4 is connected with the oil gas trapping assembly 6 through threads and is arranged in an inner cavity of the air storage cylinder 5, and two ends of the pressure release valve are limited by the upper and lower matched connectors. Wherein, the oil gas trapping assembly 6 is connected in turn by an exhaust pin 6-1, a gasket 6-2, an upper cover 6-3 of the air cylinder, a piston rod 6-5, a piston 6-7 and a lower cover 6-8 of the air cylinder and is arranged in an inner cavity of the air cylinder 5. The upper part and the lower part of the piston rod 6-5 are limited by an upper cover 6-3 of the air cylinder and a lower cover 6-8 of the air cylinder and press the sealing element 6-4, and the piston 6-7 can move in the air cylinder 5 along the piston rod 6-5 and press the sealing element 6-6.
Referring to fig. 6, the temperature and pressure measuring nipple 7 is in threaded connection through a connecting loop 7-6 by two pairs of oppositely assembled instrument chambers 7-1. The instrument bin 7-1 is internally provided with a temperature and pressure measuring sensor 7-2 and a battery 7-3 and is compressed and sealed by an instrument bin cover plate 7-4. The instrument bin group is directly connected with the one-way valve 7-7 through a high-pressure hose 7-5 and a sealing thread. The upper part of the inner cylinder temperature and pressure measuring short joint 7 is in threaded connection with the air storage cylinder 5 through threads and presses the sealing elements 7-9, and the lower end of the inner cylinder temperature and pressure measuring short joint is in threaded connection with the core stopper 8 through threads and presses the sealing elements 7-10. The lower end of the rock core limiting stopper 8 is connected with the rock core inner barrel 10 through threads, and sealing elements 7-11 are pressed. Meanwhile, the lower part of the inner cylinder temperature and pressure measuring short circuit 7 is provided with a one-way valve 7-8 with the starting pressure of 0.5 MPa.
Referring to fig. 7, a clamp type core claw 11 and a fully closed petal type core claw 12 inner cylinder are arranged in a core barrel 10, and a drilling fluid circulation channel 13-1 is arranged between the core barrel 10 and an outer cylinder 9 as well as between the core barrel and a coring bit 13.
Referring to fig. 8, the clamp type core claw 11 is composed of a core claw short section 11-1, a core claw 11-2, a necking sleeve 11-3 and a blocking sleeve 11-4. The upper part of the core claw short section 11-1 is connected with the core inner cylinder 10 through threads, the core claw short section 11-1, the necking sleeve 11-3 and the blocking sleeve 11-4 are sequentially formed through threads, the core claw 11-2 is placed in the necking sleeve 11-3, and the upper part is limited by the core claw short section 11-1. The shielding sleeve 11-4 plays a shielding role on the fully-closed petal type core claw 12.
Referring to fig. 9, the fully-closed flap type core claw 12 is partially composed of a flap valve core claw 12-1 and a centering sleeve 12-2, and the flap valve core claw 12-1 is composed of a valve flap 12-3 and a torsion spring 12-4. The centering sleeve 12-2 is arranged in the inner cavity of the coring bit 13 and plays a role in centering, and the shielding sleeve 11-4 is inserted into the valve core claw 12-1 to limit the valve clack 12-3.
The use process comprises the following steps:
after the coring tool is put into the well bottom, the drilling fluid is circulated, and after the well bottom is cleaned and no sediment or block falls, the coring operation is carried out, at the moment, the drilling fluid can only flow out of the coring barrel through the annular space 13-1 of the inner barrel 10 and the outer barrel 9 through the coring bit 13, so that the core in the barrel is prevented from being washed away in the coring process.
After coring drilling is finished, a special steel ball is put in, the steel ball is seated on a ball seat 2-3 of a sliding block mechanism 2, after a pump is started, the steel ball blocks a flow channel, the pressure in a drilling tool is suppressed to push the ball seat 2-3 to downwards shear a shearing pin 2-8 on the sliding block mechanism 2, at the moment, a locking block 2-10 for limiting the inner barrel and the outer barrel is released, and the inner barrel and the outer barrel are disconnected. At the moment, the inner cylinder 10 is lifted up, the outer cylinder 9 of the core taking cylinder keeps in place and does not move, the inner cylinder 10 moves upwards along with the sliding block mechanism 2 and the differential mechanism 1, the core in the cylinder is locked by self locking of a core claw 11-2 in the hoop type core claw mechanism 11 and is cut off, the differential mechanism 1 is lifted up, and the core moves upwards along with the inner cylinder 10. When the inner cylinder 10 moves upwards to a certain position (about 10-20cm), the shielding sleeve 11-4 is separated from the valve clack 12-3 and is acted by the spring force of the torsion spring 12-4 to seal the valve clack 12-3 of the bottom lower cover to complete the sealing and plugging of the inner cylinder.
In the process of drilling, gas is released from the shale core and gathered in the inner cylinder 10, and enters the gas storage cylinder 5 in the oil gas and oil gas trapping assembly 6 through the flow passage in the temperature and pressure measuring module 7 for storage. The temperature and pressure measuring nipple 7 records the temperature and pressure values in the inner cylinder in real time, the piston inside the air storage cylinder 5 is pushed to move upwards after the gas is released to reach a certain pressure, and the gas quantity exceeds the safety set pressure of the pressure release valve 4 and then is automatically released from the pressure release valve 4.
Claims (10)
1. A shale oil gas trapping and temperature and pressure detection coring tool in the tripping process comprises a differential mechanism, a sliding block mechanism, a water distribution joint assembly, a rock core limiting mechanism, a coring mechanism and a coring bit, and is characterized by further comprising a pressure release valve, an oil gas trapping assembly and a temperature and pressure measurement nipple; the differential mechanism, the outer barrel and the coring bit are sequentially and fixedly connected to form an outer barrel assembly, the sliding block mechanism, the water diversion joint assembly, the oil gas trapping assembly, the temperature pressure measuring nipple and the coring mechanism are sequentially and fixedly connected to form an inner barrel assembly, an upper joint connected with a drill rod is arranged at the upper part of the differential mechanism, and the inner barrel assembly is arranged inside the outer barrel assembly and is hung on the outer barrel assembly through the sliding block mechanism.
2. The tool of claim 1 for coring during tripping shale oil and gas trapping and warm-pressure testing, wherein:
differential mechanism includes the sill top connection, the sill lower clutch, sealed sliding sleeve and sealing joint, wherein: the upper joint of the tooth ridge and the upper joint of the differential mechanism are integrated, the outer wall of the upper joint of the tooth ridge is axially provided with a tooth ridge groove, the inner wall of the lower joint of the tooth ridge is axially provided with a tooth ridge bulge, the upper joint of the tooth ridge and the lower joint of the tooth ridge are engaged to form axial sliding and circumferential limiting matching, the sealing joint is connected to the lower end of the upper joint of the tooth ridge, the outer diameter of the sealing joint is larger than the minimum inner diameter of the lower joint of the tooth ridge, the upper end surface of the sealing joint and the lower end surface of the lower joint of the tooth ridge form blocking matching, and the sealing sliding sleeve is connected to the lower;
slider mechanism includes interior positioning joint, ball seat sliding sleeve, positioning joint, pressure-bearing joint and shear pin, wherein: the upper end of the inner positioning joint is connected with a sealing joint of the differential mechanism, the ball seat sliding sleeve is arranged in an annular groove in the inner positioning joint and forms axial interval sealing sliding fit with the inner positioning joint, the ball seat is arranged at the upper end of the ball seat sliding sleeve, the lower end part of the ball seat sliding sleeve is connected with the inner positioning joint through a radially arranged shearing pin, the positioning joint is sleeved outside the inner positioning joint, the upper end of the positioning joint is connected with the sealing sliding sleeve of the differential mechanism, and the inner positioning joint is hung on the positioning joint through the matching of a locking block and;
divide water swivel assembly to include and divide water swivel and end cap, wherein: the upper end of the water distribution joint is connected with a ball seat sliding sleeve of the sliding block mechanism, the lower end of the water distribution joint is plugged by a plug, the middle section of the water distribution joint is radially provided with a plurality of shunting holes, and the shunting holes are communicated with annular gaps between the outer barrel assembly and the inner barrel assembly below the shunting holes;
the oil gas entrapment assembly includes gas receiver and top-down sets gradually relief valve, gas receiver upper cover, piston rod and the gas receiver lower cover in the gas receiver, wherein: the upper part of the air cylinder is connected with the lower end of the water distribution joint, the piston rod is arranged between the upper cover of the air cylinder and the lower cover of the air cylinder, the upper cover of the air cylinder and the lower cover of the air cylinder are communicated with the external space through the central hole of the piston rod, the piston rod and the inner wall of the air cylinder form axial sealing sliding fit, the pressure release valve is connected with the upper cover of the air cylinder and communicated with the central hole of the piston rod, an air exhaust hole is arranged on the air cylinder 5 corresponding to the pressure release valve, the lower cover of the air cylinder is provided with an air inlet hole communicated with the piston cavity at the lower part of the;
the temperature and pressure measuring short section comprises an instrument bin, a temperature sensor, a pressure sensor and a battery, wherein the temperature sensor and the pressure sensor and the battery are assembled in the instrument bin, and are tightly pressed and sealed by an instrument bin cover plate;
the core taking mechanism comprises a core barrel, a core taking inner barrel, a clamp type core claw and a fully-closed valve type core claw, wherein the core barrel is arranged in the core barrel, and a drilling fluid flow channel is arranged between the core barrel, the outer barrel assembly and a core taking drill bit.
3. The tool of claim 2 for shale oil and gas trapping and warm-pressing detection coring during tripping, wherein: the clamp type core claw comprises a core claw short section, a core claw, a necking sleeve and a blocking sleeve, wherein the upper part of the core claw short section is connected with a core barrel, the core claw short section and the necking sleeve are sequentially connected, the core claw is arranged in the necking sleeve, and the upper part of the core claw is in limit fit with the core claw short section; the totally closed valve type core claw comprises a valve core claw and a centering sleeve, the valve core claw consists of a valve clack and a torsion spring, the centering sleeve is arranged in an inner cavity of the coring bit, and the shielding sleeve is inserted into the valve core claw to limit the valve clack.
4. The tool of claim 2 for shale oil and gas trapping and warm-pressing detection coring during tripping, wherein: the temperature and pressure measuring short section comprises an upper instrument bin and a lower instrument bin which are oppositely assembled and connected through a connecting loop, and a temperature and pressure sensor and a battery are respectively assembled in the two instrument bins and are compressed and sealed by an instrument bin cover plate; the two instrument bins are axially provided with air guide holes, and the air guide holes are connected with one-way valves through high-pressure hoses.
5. The tool of claim 4 for coring during tripping shale oil and gas trapping and warm-pressure testing, wherein: a low-pressure one-way valve is arranged in the air guide hole of the instrument bin below the lower part.
6. The tool for shale oil and gas trapping and warm-pressure detection coring during the tripping process of any one of claims 2-5, wherein: and a rock core limiting mechanism is arranged between the water distribution joint assembly and the coring mechanism.
7. The tool of claim 6, wherein the tool is configured to capture shale oil and gas and measure temperature and pressure for coring during a tripping operation: the upper end of the rock core limiting mechanism is connected with the instrument bin, the lower end of the rock core limiting mechanism is connected with the rock core barrel, and a rock core baffle is arranged in the middle of the rock core limiting mechanism.
8. The tool of claim 6, wherein the tool is configured to capture shale oil and gas and measure temperature and pressure for coring during a tripping operation: the water distribution joint assembly further comprises a bearing box, a suspension mandrel, a thrust bearing and a bearing support, the upper end of the bearing box is connected with a pressure-bearing joint of the sliding block mechanism, the thrust bearing is sleeved outside the suspension mandrel and then connected with the upper end of the water distribution joint, the upper portions of the suspension mandrel, the thrust bearing and the water distribution joint are arranged in the bearing box, and after the lower end of the upper end of the bearing box is connected with the bearing support, the bearing support and the thrust bearing form axial limiting.
9. The tool of claim 6, wherein the tool is configured to capture shale oil and gas and measure temperature and pressure for coring during a tripping operation: the lower end of an inner positioning joint of the sliding block mechanism is connected with a pressure-bearing joint, the upper end of the pressure-bearing joint is provided with a bulge, the bulge and a sliding groove outside the ball seat sliding sleeve form axial limiting fit, and the lower end of the ball seat sliding sleeve is connected with the pressure-bearing joint through a shearing pin arranged in the radial direction.
10. The tool of claim 6, wherein the tool is configured to capture shale oil and gas and measure temperature and pressure for coring during a tripping operation: the oil gas trapping assembly further comprises an exhaust hole arranged on the upper cover of the air cylinder, the exhaust hole is matched and sealed with the exhaust pin and the gasket, a piston rod is arranged on the central shaft of the upper cover of the air cylinder and the central shaft of the lower cover of the air cylinder, and the piston rod form axial sealing sliding fit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910061421.8A CN111550210A (en) | 2019-01-23 | 2019-01-23 | Coring tool for shale oil gas trapping and warm-pressing detection in tripping process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910061421.8A CN111550210A (en) | 2019-01-23 | 2019-01-23 | Coring tool for shale oil gas trapping and warm-pressing detection in tripping process |
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| CN111550210A true CN111550210A (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910061421.8A Pending CN111550210A (en) | 2019-01-23 | 2019-01-23 | Coring tool for shale oil gas trapping and warm-pressing detection in tripping process |
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| CN114320197A (en) * | 2022-02-12 | 2022-04-12 | 东北石油大学 | Piston type controllable differential mechanism for fidelity coring device |
| CN116065996A (en) * | 2022-08-02 | 2023-05-05 | 中国石油天然气集团有限公司 | Pressure-control coring tool and method for ultra-deep well |
| CN116065997A (en) * | 2022-08-02 | 2023-05-05 | 中国石油天然气集团有限公司 | Ball valve sealing device and method for pressure maintaining coring tool |
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