CN109339751B - Easy-drilling type composite throttle and use method thereof - Google Patents
Easy-drilling type composite throttle and use method thereof Download PDFInfo
- Publication number
- CN109339751B CN109339751B CN201811223170.0A CN201811223170A CN109339751B CN 109339751 B CN109339751 B CN 109339751B CN 201811223170 A CN201811223170 A CN 201811223170A CN 109339751 B CN109339751 B CN 109339751B
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- central rod
- conical seat
- hemisphere
- oil pipe
- slips
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- 238000005553 drilling Methods 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims description 15
- 229920001971 elastomer Polymers 0.000 claims abstract description 46
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 239000004576 sand Substances 0.000 claims description 12
- 230000002265 prevention Effects 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 229920000459 Nitrile rubber Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 2
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
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)
- Earth Drilling (AREA)
Abstract
The easy-drilling composite throttle comprises a central rod, wherein a first conical seat is arranged on the central rod, and the central rod penetrates through the first conical seat; a hemisphere, a spring and a first pressing cap are arranged in a central hole of the first cone seat, the plane of the hemisphere is perpendicular to the vertical direction, an arc groove matched with the hemisphere is formed in a central rod, a salvaging neck is arranged above the first cone seat, the central rod penetrates through the salvaging neck, a slip groove is formed in the salvaging neck, and a plurality of slips are arranged in the slip groove; a releasing connector is arranged above the salvaging neck; a rubber cylinder is arranged below the first cone seat; a second conical seat is arranged below the rubber cylinder. The throttle device has the advantages of simple structure, easy setting and easy salvage. The choke of the invention is suitable for gas wells with self-injection capability.
Description
Technical Field
The invention relates to a downhole tool for throttling and reducing pressure in a natural gas production process, in particular to an easy-drilling composite throttle and a use method thereof, which are suitable for a gas well with self-injection capability.
Background
The downhole throttling process technology is a process technology for enabling a throttling depressurization process of natural gas to occur in a well shaft of a gas well through a downhole throttle. The downhole choke of the gas well is installed in a shaft, and the downhole tool of the downhole choke technology of the gas well is realized by means of positioning of an anchoring mechanism, sealing of a rubber cylinder and production allocation of an air tap.
At present, slip type underground throttlers widely used find out in the long-term application process that the rubber cylinder of a part of throttlers cannot retract and is permanently deformed when salvaged, the phenomenon of breaking steel wires can occur due to overlarge lifting resistance when salvaged and underground accidents are caused, and once a layer of fracturing sand and fracturing fluid are covered by the sand prevention cover of the throttlers, the upstream and downstream cannot form a channel, and if the salvaging of the throttlers is unsuccessful, the subsequent well killing operation cannot be carried out.
Disclosure of Invention
The invention aims to overcome the defect that a conventional slip type downhole choke is difficult to salvage, and provides an easy-drilling type composite choke which does not need to be salvaged, and when the choke needs to be lifted out, a coiled tubing drilling and grinding tool only needs to be put into the coiled tubing drilling and grinding tool to grind the coiled tubing drilling and grinding tool.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the easy-drilling type composite throttle comprises a central rod, wherein a first conical seat is arranged on the central rod, the central rod penetrates through the first conical seat, and the first conical seat is fixed on the central rod through a second pin; a hemisphere, a spring and a first pressing cap are arranged in a central hole of the first cone seat, the plane of the hemisphere is perpendicular to the vertical direction, the spring is horizontally arranged, an arc groove matched with the hemisphere is formed in a central rod, a salvaging neck is arranged above the first cone seat, the central rod penetrates through the salvaging neck, a slip groove is formed in the salvaging neck, and a plurality of slips are arranged in the slip groove; a releasing connector is arranged above the salvaging neck; a rubber cylinder sleeved on the central rod is arranged below the first conical seat, and the rubber cylinder is connected with the first conical seat; the rubber cylinder below is provided with the second conical seat, and the second conical seat links to each other with the center pole, is provided with the air cock in the centre bore of second conical seat, and second conical seat below is provided with the sand control cover.
The invention is further improved in that one end of the spring is in contact with the plane of the hemisphere and the other end is in contact with the first press cap.
The invention is further improved in that the arc groove is positioned below the hemisphere, and when the central rod moves upwards, the hemisphere is clamped in the arc groove.
The invention is further improved in that the plurality of slips are fixed by slip hoops, and the slip hoops are fixedly connected with the first cone seat.
A further improvement of the invention is that the release joint is fixed to the central rod by means of a first pin.
A further improvement of the invention is that the second pin strength is lower than the first pin strength.
The invention is further improved in that a rubber cylinder protective sleeve for protecting the rubber cylinder is arranged on the outer side of the rubber cylinder; the rubber cylinder is made of nitrile rubber material; the rubber cylinder is in threaded connection with the first conical seat; the second conical seat is connected with the central rod through threads; the second cone seat is connected with the sand control cover through a second press cap screw thread.
The invention is further improved in that the material of the releasing joint, the salvaging neck and the hemisphere is carbon fiber.
The application method of the easy-drilling composite throttle comprises the steps of connecting a releasing connector with a steel wire tool string during throwing, entering into an oil pipe of a gas well, and enabling a slip to be subjected to friction action of the inner wall of the oil pipe in the descending process under the action of the gravity of the steel wire tool string, wherein the radial diameter of the slip is the same as that of the oil pipe and clings to the inner wall of the oil pipe to move downwards along with the whole tool; when the hydraulic pipe is lowered to a designed setting position, the steel wire is lifted up, so that the slips and the salvaging neck move downwards relative to all other parts, and the radial diameter of the slips tends to be larger due to the action of the first conical seat, and the slips are blocked on the inner wall of the oil pipe under the constraint action of the inner wall of the oil pipe; continuously lifting the steel wire, cutting off the second pin, radially expanding the rubber cylinder under the coning action of the second conical seat, and sealing the inner wall of the oil pipe; simultaneously, the arc groove of the center rod is clamped in the hemisphere to realize locking; the steel wire tool string is hit, the impact force shears the first pin of the releasing connector and the central rod, and setting is successful.
The invention is further improved in that when the restrictor needs to be lifted out, the well is cleared, and the casing is scraped; connecting a continuous oil pipe drilling and grinding tubular column on the ground according to the sequence of a connector, a double-flap check valve, a hydraulic release, a circulating joint, a screw drilling tool and a drill bit, and connecting the continuous oil pipe to the connector; a drill bit is put into the throttle device for 1 m-2 m, and the pump is started for circulation; after flushing the throttle surface, lowering and controlling the bit pressure to be 5-15 kN, starting the pump for circulation until the throttle is released from constraint, and pushing the connector, the double-flap check valve, the hydraulic release, the circulating joint and the screw drilling tool to the artificial well bottom.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the hemispherical is arranged in the central rod of the first conical seat, the circular arc groove matched with the hemispherical is arranged on the central rod, when in setting, the hemispherical enters into the circular arc groove, locking of the hemispherical and the circular arc groove is realized, and the first pin is shortened, so that setting can be realized. The choke of the invention is suitable for gas wells with self-injection capability.
Furthermore, the materials of the releasing connector, the salvaging neck and the hemisphere are carbon fibers, when the throttler needs to be lifted out, the continuous oil pipe drilling and grinding pipe column is only needed to be put into the continuous oil pipe drilling and grinding pipe column to drill and grind the continuous oil pipe, and the defect that the normal production of a gas well is influenced due to salvaging failure of a conventional slip type throttler is overcome.
Furthermore, the rubber cylinder is made of nitrile rubber material, and after the second pin is sheared, the rubber cylinder radially expands under the coning action of the second conical seat to seal with the inner wall of the oil pipe, so that the problem of axial retraction of the rubber cylinder is solved.
When the invention is used, the steel wire tool string is connected with the releasing connector during releasing, and the releasing connector enters the oil pipe of the gas well, and the slips are subjected to the friction action of the inner wall of the oil pipe in the releasing process due to the gravity effect of the steel wire tool string, the radial diameter of the slips is the same as that of the oil pipe, and the slips are clung to the inner wall of the oil pipe and move downwards along with the whole tool. The slip is placed at a designed setting position, the steel wire is slowly lifted up, the slip and the salvaging neck move downwards relative to all other parts, the radial diameter of the slip is prone to be increased due to the action of the first conical seat, and the slip is blocked on the inner wall of the oil pipe under the constraint action of the inner wall of the oil pipe. Continuously lifting the steel wire, cutting off the second pin, radially expanding the rubber cylinder under the coning action of the second conical seat, and sealing the inner wall of the oil pipe; meanwhile, the circular arc groove of the center rod is clamped in the hemisphere to realize locking, so that the rubber cylinder cannot retract axially any more and is sealed with the oil pipe in the underground throttling production process. And (3) using a steel wire tool string to punch and shear the first pin of the release joint and the central rod, and setting successfully. The steel wire tool string is pulled out of the shaft, so that the shaft can be opened to realize underground throttling process production.
Further, when the restrictor needs to be lifted out, the well is cleared, and the casing is scraped; and connecting the continuous oil pipe drilling and grinding pipe column with the connector, the double-flap check valve, the hydraulic release, the circulating joint, the screw drilling tool and the drill bit in sequence on the ground, and connecting the continuous oil pipe to the connector. And (3) feeding the drill bit to the throttle for 1-2 m, and starting the pump for circulation. After flushing the throttle surface, slowly lowering and controlling the drilling pressure to 5-15 kN, starting the pump for circulation until the throttle is released from constraint, and pushing the connector, the double-flap check valve, the hydraulic release, the circulating joint and the screw drilling tool to the artificial well bottom.
Drawings
FIG. 1 is a schematic diagram of an easy-drilling composite restrictor.
Fig. 2 is a schematic diagram of a connection structure of the first press cap, the spring and the hemisphere.
Fig. 3 is a schematic diagram of a string structure of a coiled tubing drill string.
The hydraulic release device comprises a release connector 1, a first pin 2, a central rod 3, a salvaging neck 4, a slip hoop 5, a slip 6, a first conical seat 7, a first pressure cap 8, a spring 9, a hemisphere 10, a second pin 11, a rubber sleeve protective sleeve 12, a rubber sleeve 13, a second conical seat 14, an air tap 15, a second pressure cap 16, a sand prevention cover 17, a connector 18, a double-flap check valve 19, a hydraulic release 20, a circulating connector 21, a screw drill 22 and a drill bit 23.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the invention comprises a releasing joint 1, a first pin 2, a central rod 3, a salvaging neck 4, a slip hoop 5, a slip 6, a first cone seat 7, a first pressure cap 8, a spring 9, a hemisphere 10, a second pin 11, a rubber sleeve 12, a rubber 13, a second cone seat 14, an air tap 15, a second pressure cap 16 and a sand prevention cover 17.
Wherein, a first conical seat 7 is arranged on the central rod 3, the central rod 3 passes through the first conical seat 7, the first conical seat 7 is fixed on the central rod 3 through a second pin 11, a hemisphere 10, a spring 9 and a first press cap 8 are arranged in a central hole of the first conical seat 7, the plane of the hemisphere 10 is vertical to the vertical direction, the spring 9 is horizontally arranged, one end of the spring 9 is contacted with the plane of the hemisphere 10, and the other end is contacted with the first press cap 8; the center rod 3 is provided with an arc groove matched with the hemisphere 10, the arc groove is positioned below the hemisphere 10, and when the center rod 3 moves upwards, the hemisphere 10 is clamped in the arc groove; the first conical seat 7 top is provided with salvages neck 4, and center pole 3 passes salvages neck 4, and specifically, salvages neck 4 suit outside on center pole 3, and when center pole 3 upwards moved, salvages neck 4 and upwards moves along with center pole 3. The salvaging neck 4 is provided with a slip groove, three slips 6 are arranged in the slip groove, the three slips 6 are fixed through slip hoops 5, and the slip hoops 5 are fixedly connected with the first cone seat 7. A releasing connector 1 is arranged above the fishing neck 4, and the releasing connector 1 and the center rod 3 are fixed through a first pin 2; a rubber cylinder 13 sleeved on the central rod 3 is arranged below the first cone seat 7, a rubber cylinder protective sleeve 12 for protecting the rubber cylinder 13 is arranged outside the rubber cylinder 13, and the rubber cylinder 13 is in threaded connection with the bottom of the first cone seat 7; a second conical seat 14 is arranged below the rubber cylinder 13, the second conical seat 14 is connected with the central rod 3 through screw threads, an air tap 15 is arranged in a central hole of the second conical seat 14, a sand prevention cover 17 is arranged below the second conical seat 14, and the second conical seat 14 and the sand prevention cover 17 are connected through screw threads of a second pressing cap 16.
The invention is realized in the following way: the central rod 3 passes through the first conical seat 7 and the central rod 3 and the first conical seat 7 are fixed by a second pin 11; sequentially placing a hemisphere 10 and a spring 9 into a hole of a first cone seat 7 and fixing the hemisphere and the spring by a first press cap 8; three slips 6 are put into the slip groove of the fishing neck 4 and penetrate through the center rod 3, and the slip hoop 5 is fixed with the first cone seat 7; the releasing connector 1 and the central rod 3 are fixed by a first pin 2; the rubber cylinder protective sleeve 12 is arranged on the outer side of the rubber cylinder 13, the rubber cylinder protective sleeve 12 and the rubber cylinder 13 sequentially penetrate through the center rod 3, and the rubber cylinder 13 is in threaded connection with the first cone seat 7; the air tap 15 is placed in the central hole of the second conical seat 14, the second pressure cap 16 and the sand control cover 17 are connected with the second conical seat 14 in a threaded manner, and the second conical seat 14 is connected with the central rod 3 in a threaded manner. The circular arc groove on the central rod 3 is clamped on the hemisphere 10 to realize locking. The second pin 11 has a lower strength than the first pin 2.
According to the invention, the first pin 2 and the second pin 11 are made of brass, the slips 6, the first pressing cap 8 and the second pressing cap 16 are made of ductile cast iron, the releasing connector 1, the salvaging neck 4 and the hemisphere 10 are made of carbon fibers, the slip hoop 5, the first cone seat 7, the rubber sleeve 12 and the second cone seat 14 are made of polytetrafluoroethylene, the spring 9 is made of carbon spring steel, the center rod 3 and the sand prevention cover 17 are made of aluminum alloy, the rubber sleeve 13 is made of nitrile rubber, the air tap 15 is made of hard alloy, and the requirement of the throttle on easy drilling property is ensured under the condition of meeting the strength.
Referring to fig. 1,2 and 3, the easy-drilling composite restrictor of the present invention is used as follows:
The invention finishes setting and salvaging through steel wire operation.
1. Setting tool
When the well oil pipe is put in, the steel wire tool string is connected with the releasing connector 1, and the well oil pipe enters the well, and due to the action of the gravity of the steel wire tool string, the slips 6 are under the friction action of the inner wall of the oil pipe in the lowering process, and the radial diameter of the slips 6 is the same as that of the oil pipe and clings to the inner wall of the oil pipe to move downwards along with the whole tool. The slip 6 and the salvaging neck 4 move downwards relative to all other parts by slowly lifting the steel wire after being lowered to the designed setting position, and the radial diameter of the slip 6 tends to be larger due to the action of the first conical seat 7, and the slip is blocked on the inner wall of the oil pipe under the constraint action of the inner wall of the oil pipe. Continuing to lift the steel wire, cutting off the second pin 11, radially expanding the rubber cylinder 13 under the coning action of the second conical seat 14, and sealing the inner wall of the oil pipe; at the same time, the circular arc groove of the center rod 3 is clamped in the hemisphere 10 to realize locking, so that the rubber cylinder 13 can not retract axially any more and is sealed with the oil pipe in the underground throttling production process. The steel wire tool string is used for up-clicking, the first pin 2 of the releasing connector 1 and the central rod 3 is sheared, and setting is successful. The steel wire tool string is pulled out of the shaft, so that the shaft can be opened to realize underground throttling process production.
2. Drilling and grinding machine
Referring to fig. 3, when the choke needs to be lifted out, the well is cleared and the casing is scraped; a coiled tubing string is connected to the connector 18 at the surface by connecting the connector 18, the double-flap check valve 19, the hydraulic release 20, the circulation joint 21, the screw drilling tool 22 and the drill bit 23 in that order. And (3) the drill bit 23 is put into the throttle device 1 m-2 m, and the pump circulation is started. After flushing the restrictor face, slowly lowering and controlling the weight on bit to 5-15 kN, starting the pump circulation until the restrictor is unconstrained, and then pushing the remaining components (i.e. the connector 18, the double-flap check valve 19, the hydraulic release 20, the circulation joint 21 and the screw drilling tool 22) to the artificial well bottom.
Claims (4)
1. The easy-drilling type composite throttle is characterized by comprising a central rod (3), wherein a first conical seat (7) is arranged on the central rod (3), the central rod (3) penetrates through the first conical seat (7), and the first conical seat (7) is fixed on the central rod (3) through a second pin (11); a hemisphere (10), a spring (9) and a first pressing cap (8) are arranged in a central hole of the first cone seat (7), the plane of the hemisphere (10) is perpendicular to the vertical direction, the spring (9) is horizontally arranged, an arc groove matched with the hemisphere (10) is formed in the central rod (3), a salvage neck (4) is arranged above the first cone seat (7), the central rod (3) penetrates through the salvage neck (4), a slip groove is formed in the salvage neck (4), and a plurality of slips (6) are arranged in the slip groove; a releasing connector (1) is arranged above the salvaging neck (4); a rubber cylinder (13) sleeved on the central rod (3) is arranged below the first conical seat (7), and the rubber cylinder (13) is connected with the first conical seat (7); a second conical seat (14) is arranged below the rubber cylinder (13), the second conical seat (14) is connected with the central rod (3), an air tap (15) is arranged in a central hole of the second conical seat (14), and a sand prevention cover (17) is arranged below the second conical seat (14);
the arc groove is positioned below the hemisphere (10), and when the central rod (3) moves upwards, the hemisphere (10) is clamped in the arc groove;
the rubber cylinder (13) is made of nitrile rubber material;
The releasing connector (1), the salvaging neck (4) and the hemisphere (10) are made of carbon fiber;
one end of the spring (9) is contacted with the plane of the hemisphere (10), and the other end is contacted with the first press cap (8);
The releasing connector (1) and the central rod (3) are fixed through a first pin (2);
The second pin (11) has a lower strength than the first pin (2).
2. An easy-drilling compound choke according to claim 1, characterized in that several slips (6) are fixed by means of slip hoops (5), and that the slip hoops (5) are fixedly connected with the first cone seat (7).
3. The easy-drilling compound throttle device according to claim 1, characterized in that a rubber sleeve (12) for protecting the rubber sleeve (13) is arranged on the outer side of the rubber sleeve (13); the rubber cylinder (13) is in threaded connection with the first cone seat (7); the second conical seat (14) is connected with the central rod (3) in a threaded manner; the second conical seat (14) and the sand prevention cover (17) are connected through a second press cap (16) in a threaded manner.
4. A method of using the composite throttle based on the drillable type of claim 1 to 3, characterized in that,
When the gas well is put in, the steel wire tool string is connected with the releasing connector (1) and enters the gas well oil pipe, and the slips (6) are subjected to the friction action of the inner wall of the oil pipe in the lowering process due to the gravity effect of the steel wire tool string, the radial diameter of the slips (6) is the same as that of the oil pipe, and the slips are clung to the inner wall of the oil pipe and move downwards along with the whole tool; when the pipe is lowered to a designed setting position, the steel wire is lifted up, so that the slips (6) and the salvaging neck (4) move downwards relative to all other parts, and the radial diameter of the slips (6) tends to be larger due to the action of the first conical seat (7), so that the slips are blocked by the constraint action of the inner wall of the oil pipe; continuing to lift the steel wire, cutting off the second pin (11), radially expanding the rubber cylinder (13) under the coning action of the second conical seat (14) and sealing the inner wall of the oil pipe; simultaneously, the circular arc groove of the center rod (3) is clamped in the hemisphere (10) to realize locking; the steel wire tool string is hit, the impact force shears off the first pin (2) of the releasing connector (1) and the central rod (3), and the setting is successful;
When the restrictor needs to be lifted out, the well is opened, and the casing is scraped; connecting a continuous oil pipe drilling and grinding tubular column on the ground according to the sequence of a connector (18), a double-flap check valve (19), a hydraulic release (20), a circulating joint (21), a screw drilling tool (22) and a drill bit (23), and connecting the continuous oil pipe to the connector (18); a drill bit (23) is put into the throttle device for 1 m-2 m, and the pump is started for circulation; after flushing the throttle surface, lowering and controlling the bit pressure to be 5-15 kN, starting the pump circulation until the throttle is released, and pushing the connector (18), the double-flap check valve (19), the hydraulic release (20), the circulating joint (21) and the screw drilling tool (22) to the artificial well bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811223170.0A CN109339751B (en) | 2018-10-19 | 2018-10-19 | Easy-drilling type composite throttle and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811223170.0A CN109339751B (en) | 2018-10-19 | 2018-10-19 | Easy-drilling type composite throttle and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109339751A CN109339751A (en) | 2019-02-15 |
| CN109339751B true CN109339751B (en) | 2024-06-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811223170.0A Active CN109339751B (en) | 2018-10-19 | 2018-10-19 | Easy-drilling type composite throttle and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109339751B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915054A (en) * | 2019-03-27 | 2019-06-21 | 咸阳荣达石油技术服务有限公司 | A kind of fracturing sand buries the Refloatation method of stuck flow controller |
| CN109869135A (en) * | 2019-03-27 | 2019-06-11 | 咸阳荣达石油技术服务有限公司 | A kind of detection method of the stuck reason of underground throttle device |
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| US6868909B2 (en) * | 2001-06-26 | 2005-03-22 | Baker Hughes Incorporated | Drillable junction joint and method of use |
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| CN107178354B (en) * | 2017-08-02 | 2019-02-19 | 荆州市赛瑞能源技术有限公司 | A stepless drag fracturing process in casing and fracturing tool string |
| CN107255023A (en) * | 2017-08-18 | 2017-10-17 | 中国石油集团川庆钻探工程有限公司 | Large-drift-diameter drilling-free bridge plug with setting releasing function |
| CN107476773A (en) * | 2017-08-24 | 2017-12-15 | 中国石油天然气股份有限公司 | Tool string and method for eliminating obstacles in well |
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| CN201627572U (en) * | 2010-02-25 | 2010-11-10 | 中国石油天然气股份有限公司 | Underground throttle |
| CN202832433U (en) * | 2012-07-26 | 2013-03-27 | 中国石油天然气股份有限公司 | Slip type underground throttle easy to salvage |
| CN102913166A (en) * | 2012-10-19 | 2013-02-06 | 中国石油化工股份有限公司 | Method for drilling and milling sliding sleeves and ball seats of horizontal well by continuous oil pipe |
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| CN109339751A (en) | 2019-02-15 |
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