CN111075407A - Gas well full life cycle downhole throttling production device and use method thereof - Google Patents
Gas well full life cycle downhole throttling production device and use method thereof Download PDFInfo
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- CN111075407A CN111075407A CN201911312797.8A CN201911312797A CN111075407A CN 111075407 A CN111075407 A CN 111075407A CN 201911312797 A CN201911312797 A CN 201911312797A CN 111075407 A CN111075407 A CN 111075407A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 239000004576 sand Substances 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 230000002265 prevention Effects 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 7
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims 1
- 230000035939 shock Effects 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 29
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
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- Marine Sciences & Fisheries (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a full-life-cycle downhole throttling production device of a gas well and a using method thereof. The lower end of the dispenser is provided with two symmetrical strip-shaped grooves, and the dispenser and the underground throttler are fixedly connected together through pins. The gas well full life cycle downhole throttling production device adopts the V-shaped sealing ring made of special materials to form self-sealing seal, and the putting success rate is high; and the sealing surface is short, the hardness is high, the releasing force during fishing is small, and the fishing success rate is high. Meanwhile, the device has the advantages that when fishing fails, a large channel is formed by knocking off the air tap of the air tap, the smooth implementation of the drainage and gas production process in the middle and later periods of the gas well is not influenced, the structure is simple, the field operation is convenient, and the cost reduction and the efficiency improvement are obvious.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of natural gas exploitation, and relates to a preset underground throttling device, in particular to a full-life-cycle underground throttling production device of a gas well and a using method thereof.
[ background of the invention ]
In natural gas production, for the purposes of pressure reduction, throttling and production limitation, a downhole choke is often installed in a gas well shaft, and the downhole choke is divided into a slip choke and a preset choke in a seat sealing mode. The slip type choke is set and anchored at any position in a production string. The preset choke is anchored in a preset working barrel which is connected to a production string and is put into the well along with the production string. The slip type choke is widely applied in the early stage of development of the Suliger gas field, and popularization and application show that the choke is difficult to salvage and easy to cause underground accidents. The preset throttler has short sealing surface, good sealing reliability and long service life, and once the sealing section is separated from the preset working barrel, the outer diameter of the sealing section is smaller than the inner drift diameter of the production string, so that the sealing section has almost no friction resistance when being salvaged and lifted, and is easy to salvage. Therefore, the preset restrictor replaces a slip restrictor due to the advantage of easy salvage, and popularization and application are realized.
The conventional preset throttling device is sealed by a rubber cylinder, so that the blockage removal resistance is large during fishing, the fishing success rate is 75%, the expected target is not reached, and the conventional preset throttling device needs to be further improved. Meanwhile, when the fishing fails, the choke influences the smooth implementation of the middle-stage drainage and gas production process of the gas well, and the production requirements of pipe pressing and pipe lifting in the later stage and the like. Therefore, in order to further improve the fishing success rate of the preset choke and ensure that the production of a gas well is not influenced when the fishing of the choke fails, and the productivity of the gas well is fully exerted, the underground throttle device meeting the production of the gas well in the whole life cycle needs to be developed.
[ summary of the invention ]
The invention aims to solve the problem that the fishing success rate in the prior art cannot reach the expected target, and provides a full-life-cycle downhole throttling production device for a gas well and a use method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a gas well full life cycle downhole throttling production apparatus comprising:
the device comprises a dispenser, a cutter head, a;
the underground choke comprises a fishing head and a locking block body, the lower end of the dispenser extends into the fishing head and the locking block body, and a boss at the upper end of the dispenser is abutted against the upper end of the fishing head; the locking block body is sleeved at the lower end of the fishing head; an axial through hole is formed in the middle of the lock block body, and the movable lock block is embedded into the axial through hole; the lower end of the lock block body is connected with the support body; an air nozzle seat is arranged in the supporting body, an air nozzle is arranged in the air nozzle seat, and a pressing cap used for pressing the air nozzle is arranged on the air nozzle seat; the end of the supporting body is provided with a sand prevention cover.
The throttling production device of the invention is further improved in that:
the dispenser is fixedly connected with the fishing head through a pin.
The outer wall of the fishing head is sequentially sleeved with a lock cap, a baffle ring, a C-shaped ring and a lock block body; the lower end of the lock cap is connected with the upper end of the lock block body through a screw thread; the baffle ring is limited by the concave platform on the inner wall of the lock cap and the upper end of the lock block body; the C-shaped ring is sleeved in a U-shaped groove formed in the middle of the outer wall of the fishing head, and the outer wall of the C-shaped ring is tangent to the inner wall of the lock block body.
The upper end of the supporting body is provided with a boss, and a spacer ring and a V-shaped sealing ring are sleeved on the boss.
The air nozzle seat and the support body are fixed through the first shear pin.
The upper end of the sand prevention cover is connected with the screw thread at the lower end of the support body.
The hemispherical bottom cap is embedded into the sand control cover and locked by the second shear pin.
The anti-sitting pin is in threaded connection with the radial through hole at the lower part of the lock block body, and the top of the anti-sitting pin extends into the lower end strip-shaped groove of the dispenser.
The use method of the gas well full life cycle downhole throttling production device comprises the following states:
downhole conditions
Connecting the upper end threads of the dispenser with a downhole operation steel wire tool string, lowering the dispenser into a preset working barrel at a designed position in an oil pipe of a gas well, limiting by virtue of a boss on the outer wall of the support body, and enabling the V-shaped sealing ring to enter a sealing section of the preset working barrel to finish the lowering; if the designed position is not reached in the process of going down the well, the dispenser is connected with the underground throttler through the anti-sitting pin after the pin is cut off, and the anti-sitting pin prevents the underground throttler from being separated from the well;
set state
After the throttling production device is thrown into the working barrel, the downhole operation steel wire tool string is lifted upwards, so that after the tool string jar is opened, downward impact is released instantly to push the dispenser to slide downwards, the dispenser pushes the fishing head to slide downwards through the upper end boss, the lower end of the dispenser slides relative to the locking block body, and the shear pin is cut off; the boss at the lower part of the fishing head pushes the movable locking block outwards, so that the movable locking block extends out of the locking block body and enters the working barrel; repeatedly lifting and lowering the tool string until the fishing head drives the C-shaped ring to slide downwards into the limiting groove on the inner wall of the lock block body, the boss on the outer wall of the upper part of the fishing head is attached to the upper end of the lock cap, and the V-shaped sealing ring finishes primary sealing of the tool and the inner wall of the oil pipe;
working state
After setting is finished, the underground operation steel wire tool string is lifted up, the dispenser strings the oil outlet pipe along with the tool, the movable locking block enters the working barrel to finish fixing, and the V-shaped sealing ring finishes primary sealing with the inner wall of the oil pipe; after a well is opened, the front-back pressure difference of the throttling production device pushes a bottom cap, the bottom cap pushes a sand prevention cover, the sand prevention cover pushes a support body, and the support body extrudes a V-shaped sealing ring to continuously expand to complete secondary sealing; gas enters along the radial slot of the sand prevention cover and completes depressurization and throttling through the central pore of the gas nozzle;
salvaging state
During fishing, the operation steel wire tool string is connected with the SD fishing tool, the SD fishing tool shakes the tool string upwards after entering the inner wall groove at the upper part of the fishing head along with the falling inertia of the tool string, the SD fishing tool drives the fishing head to move upwards, the C-shaped ring slides out of the inner wall groove of the lock block body and moves upwards along with the fishing head, the movable lock block loses support and is released from the preset working barrel, the tool string is lifted continuously, the inner wall boss at the middle part of the fishing head drives the baffle ring to move upwards, the baffle ring drives the lock cap to move upwards integrally, meanwhile, the V-shaped sealing ring leaves the sealing section of the preset working barrel, and the state is maintained until the throttling production;
full lifecycle production state
In the production process of the gas well, the tool string is used for downwards striking the air nozzle seat to drive the air nozzle and the pressing cap to downwards move, the first shear pin is cut off, the tool string is continuously downwards struck, the pressing cap extrudes the bottom cap to cut off the second shear pin, the air nozzle seat, the air nozzle, the pressing cap and the bottom cap all fall into the well bottom, and at the moment, a gas production channel with the diameter of 25mm is kept in the throttling production device.
Compared with the prior art, the invention has the following beneficial effects:
the gas well full life cycle downhole throttling production device adopts the V-shaped sealing ring made of special materials to form self-sealing seal, and the putting success rate is high; and the sealing surface is short, the hardness is high, the releasing force during fishing is small, and the fishing success rate is high. Meanwhile, the device has the advantages that when fishing fails, a large channel is formed by knocking off the air tap of the air tap, the smooth implementation of the drainage and gas production process in the middle and later periods of the gas well is not influenced, the structure is simple, the field operation is convenient, and the cost reduction and the efficiency improvement are obvious.
[ description of the drawings ]
FIG. 1 is a schematic view of the downhole configuration of the present invention;
FIG. 2 is a schematic structural view of a set state of the present invention;
FIG. 3 is a schematic structural diagram of the working state of the present invention;
FIG. 4 is a schematic structural view of the fishing state of the present invention;
FIG. 5 is a schematic structural view of a full life cycle production state of the present invention;
FIG. 6 is a schematic diagram of a dispenser according to the present invention;
FIG. 7 is a schematic view of the retainer ring of the present invention;
FIG. 8 is a schematic view of a C-ring according to the present invention.
Wherein: 1-a dispenser; 2-fishing the head; 3-locking the cap; 4-a baffle ring; 5-C type ring; 6-locking block body; 7-locking the block; 8-sitting prevention pins; 9-pins; 10-spacer ring; 11-V type seal ring; 12-a support; 13-a first shear pin; 14-air tap; 15-air nozzle seat; 16-pressing a cap; 17-a sand control cover; 18-a second shear pin; 19-bottom cap.
[ detailed description ] embodiments
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
In the context of the present disclosure, when a layer/element is referred to as being "on" another layer/element, it can be directly on the other layer/element or intervening layers/elements may be present. In addition, if a layer/element is "on" another layer/element in one orientation, then that layer/element may be "under" the other layer/element when the orientation is reversed.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the gas well full life cycle downhole throttling production device comprises a dispenser 1 and a downhole throttling device. The lower end of the dispenser 1 is provided with two symmetrical strip-shaped grooves, and the dispenser 1 is fixedly connected with the underground throttler through a pin 9. The underground throttler comprises a fishing head 2, a locking cap 3, a baffle ring 4, a C-shaped ring 5, a locking block body 6, a movable locking block 7, a sitting-preventing pin 8, a pin 9, a spacer ring 10, a V-shaped sealing ring 11, a supporting body 12, a first shear pin 13, an air nozzle 14, an air nozzle seat 15, a pressing cap 16, a sand prevention cover 17, a second shear pin 18 and a bottom cap 19.
The invention has the following specific structure:
the lower end of the dispenser 1 extends into the fishing head 2 and the locking block body 6, and a boss at the upper end is abutted against the upper end of the fishing head 2 and is fixed by a pin 9; the locking cap 3, the baffle ring 4, the C-shaped ring 5, the locking block body 6 and the movable locking block 7 are sequentially sleeved on the outer wall of the fishing head 2; the lower end of the lock cap 3 is connected with the upper end of the lock block body 6 through a screw thread; the baffle ring 4 is limited by a concave platform on the inner wall of the lock cap 3 and the upper end of the lock block body 6; the C-shaped ring 5 is sleeved in a U-shaped groove formed in the middle of the outer wall of the fishing head 2, and the outer wall of the C-shaped ring 5 is tangent to the inner wall of the locking block body 6; the movable locking block 7 is embedded into an axial through hole formed in the middle of the locking block body 6 and is flexible in movement; the spacer ring 10 and the V-shaped sealing ring 11 are sequentially combined and sleeved on the outer wall of the boss at the upper end of the supporting body 12; the upper end of the supporting body 12 is connected and pressed with the screw thread at the lower end of the locking block body 6; the air tap 14 is arranged in the cavity of the air tap seat 15 and is connected and pressed tightly by a press cap 16 and a screw thread of the air tap seat 15; the air nozzle seat 15 and the support body 12 are fixed through a first shear pin 13; the upper end of the sand control cover 17 is connected with the screw thread at the lower end of the support body 12; a hemispherical bottom cap 19 is embedded in the sand control cover 17 and locked by a second shear pin 18; prevent sitting pin 8 and 6 radial through-hole screw connections in lower part of locking block, prevent sitting the top of pin 8 and stretch into the lower extreme bar groove of dispenser 1.
The invention finishes the processes of throwing, salvaging and the like through steel wire operation, and the specific working principle and the working process are as follows:
a. downhole conditions
As shown in figure 1, after the device is assembled according to figure 1, the device is connected with a downhole operation steel wire tool string through threads at the upper end of a dispenser 1, slowly lowered into a preset working barrel (the tension of a steel wire is obviously reduced) at a designed position in an oil pipe of a gas well, limited by a boss on the outer wall of a support body 12, a V-shaped sealing ring 11 enters a sealing section of the preset working barrel to finish the lowering of the well, and the device is kept as shown in figure 1. When the device does not reach the designed position and meets resistance in the process of descending, after the pin 9 is cut off, the dispenser 1 is connected with the gas well full life cycle underground throttling production device through the anti-sitting pin 8, and the anti-sitting pin 8 prevents the device from being separated from the descending well.
b. Set state
As shown in fig. 2, after the tool string is thrown into the working barrel, the downhole operation wire tool string is lifted upwards, so that the tool string jar is opened and then instantly releases downward impact to push the thrower 1 to slide downwards, the thrower 1 pushes the fishing head 2 to slide downwards through the upper end boss, the lower end of the thrower 1 slides relative to the lock block body 6, and the shear pin 9 is cut off; the outer top of the boss at the lower part of the fishing head 2 is provided with a movable locking block 7 which extends out of a locking block body 6 and enters into the working barrel; repeatedly lift and transfer the instrument cluster, in driving C type ring 5 and sliding downwards to the spacing recess of the 6 inner walls of locking piece bodies up to fishing head 2, fishing head 2 upper portion outer wall boss pastes with 3 upper ends of lock cap, V type sealing washer 11 accomplishes the instrument and just seals with the oil pipe inner wall, and the device keeps the state like fig. 2.
c. Working state
As shown in figure 3, after setting is completed, the downhole operation steel wire tool string is lifted, the dispenser 1 lifts an oil outlet pipe along with the tool string, the movable locking block 7 enters the working cylinder to complete the fixing of the device, and the V-shaped sealing ring 11 completes the primary sealing of the tool and the inner wall of the oil pipe; after a well is opened, the front-back pressure difference of the device pushes a hemispherical bottom cap 19, the hemispherical bottom cap 19 pushes a sand prevention cover 17, the sand prevention cover 17 pushes a support body 12, and the support body 12 extrudes a V-shaped sealing ring 11 to continuously expand to complete secondary sealing; the gas enters along the radial slot of the sand control cover 17, and the pressure reduction and throttling are completed through the central pore of the air tap 14, and the device is kept as shown in figure 3.
d. Salvaging state
As shown in fig. 4, the present invention requires fishing at the mid-to-late stages of gas well production. During salvaging, the operation steel wire tool string is connected with the SD salvaging tool, after the SD salvaging tool enters the inner wall groove at the upper part of the salvaging head 2 along with the falling inertia of the tool string, the SD salvaging tool drives the salvaging head 2 to move upwards, the inner wall groove of the C-shaped ring 5 sliding out of the lock block body 6 moves upwards along with the salvaging head 2, the movable lock block 7 loses support and is released from the preset working barrel, the tool string continues to be lifted, the inner wall boss at the middle part of the salvaging head 2 drives the baffle ring 4 to move upwards, the baffle ring 4 drives the device connected with the lock cap 3 to move upwards integrally, meanwhile, the V-shaped sealing ring 11 leaves the sealing section of the preset working barrel, the device keeps the state as shown in figure 4, and the shaft is fished out.
e. Full lifecycle production state
As shown in fig. 5, in the production process of a gas well, when the device cannot be normally fished due to serious liquid or sand output of a shaft, a special tool is strung and added by a well testing tool, the lower striking air nozzle seat 15 drives the air nozzle 14 and the pressing cap 16 to move downwards, the first shear pin 13 is sheared off, the tool string continues to strike downwards, the pressing cap 16 extrudes the bottom cap 19 to shear the second shear pin 18, the air nozzle seat 15, the air nozzle 14, the pressing cap 16 and the bottom cap 19 all fall into the bottom of the well, at the moment, a sufficiently large gas production channel (phi 25mm) is kept in the device, the gas well can completely meet the implementation of other drainage gas production processes and the production of pipe lifting under pressure at the later stage, and the device is.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (9)
1. A gas well full life cycle downhole throttling production device, comprising:
the device comprises a dispenser (1), wherein the dispenser (1) is arranged in an underground throttler, a boss is arranged at the upper end of the dispenser (1), and two symmetrical strip-shaped grooves are formed in the lower end of the dispenser;
the underground choke comprises a fishing head (2) and a locking block body (6), the lower end of a dispenser (1) extends into the fishing head (2) and the locking block body (6), and a boss at the upper end of the dispenser (1) is abutted against the upper end of the fishing head (2); the lock block body (6) is sleeved at the lower end of the fishing head (2); an axial through hole is formed in the middle of the lock block body (6), and the movable lock block (7) is embedded into the axial through hole; the lower end of the lock block body (6) is connected with a support body (12); an air nozzle seat (15) is arranged in the support body (12), an air nozzle (14) is arranged in the air nozzle seat (15), and a pressing cap (16) for pressing the air nozzle (14) is arranged on the air nozzle seat (15); the end of the supporting body (12) is provided with a sand prevention cover (17).
2. Gas well full life cycle downhole throttling production device according to claim 1, characterized in that the dispenser (1) is fixedly connected to the fishing head (2) by means of a pin (9).
3. The gas well full-life-cycle downhole throttling production device as claimed in claim 1, characterized in that the outer wall of the fishing head (2) is sleeved with a locking cap (3), a baffle ring (4), a C-shaped ring (5) and a locking block body (6) in sequence; the lower end of the lock cap (3) is connected with the upper end of the lock block body (6) through a screw thread; the baffle ring (4) is limited by the concave platform on the inner wall of the lock cap (3) and the upper end of the lock block body (6); the C-shaped ring (5) is sleeved in a U-shaped groove formed in the middle of the outer wall of the fishing head (2), and the outer wall of the C-shaped ring (5) is tangent to the inner wall of the locking block body (6).
4. Gas well full life cycle downhole throttling production device according to claim 1, characterized in that the upper end of the support body (12) is provided with a boss on which a spacer ring (10) and a V-shaped sealing ring (11) are sleeved.
5. Gas well full life cycle downhole choke production device according to claim 1, characterized in that the nozzle holder (15) is fixed with the support body (12) by means of a first shear pin (13).
6. Gas well full life cycle downhole choke production device according to claim 1, characterized in that the upper end of the sand control cage (17) is threaded to the lower end of the support body (12).
7. Gas well full life cycle downhole choke production device according to claim 1, characterized in that a hemispherical bottom cap (19) is embedded in the sand control cage (17) and locked by second shear pins (18).
8. The gas well full life cycle downhole throttling production device as claimed in claim 1, characterized in that the anti-seating pin (8) is screwed with a radial through hole at the lower part of the locking block body (6), and the top of the anti-seating pin (8) extends into a strip-shaped groove at the lower end of the dispenser (1).
9. A method of using the gas well full life cycle downhole choke production apparatus of any one of claims 1 to 8, comprising the following states:
downhole conditions
Connecting the upper end thread of the dispenser (1) with an underground operation steel wire tool string, lowering the upper end thread into a preset working barrel at a designed position in an oil pipe of a gas well, limiting by virtue of a boss on the outer wall of a support body (12), and enabling a V-shaped sealing ring (11) to enter a sealing section of the preset working barrel to finish descending; if the designed position is not reached in the process of going down the well, the pin (9) is cut off, the dispenser (1) and the underground throttler are connected by the anti-seating pin (8), and the anti-seating pin (8) prevents the underground throttler from being disengaged from the well;
set state
After the throttling production device is thrown into the working barrel, the underground operation steel wire tool string is lifted upwards, so that after the tool string jar is opened, downward impact is released instantly to push the thrower (1) to slide downwards, the thrower (1) pushes the fishing head (2) to slide downwards through the upper end boss, the lower end of the thrower (1) and the lock block body (6) slide relatively, and the shear pin (9) is sheared; a boss at the lower part of the fishing head (2) is externally propped against a movable locking block (7) so as to extend out of a locking block body (6) and enter the working barrel; repeatedly lifting and lowering the tool string until the fishing head (2) drives the C-shaped ring (5) to slide downwards into the limiting groove on the inner wall of the lock block body (6), the boss on the outer wall of the upper part of the fishing head (2) is attached to the upper end of the lock cap (3), and the V-shaped sealing ring (11) completes primary sealing of the tool and the inner wall of the oil pipe;
working state
After setting is finished, the underground operation steel wire tool string is lifted up, the dispenser (1) lifts an oil outlet pipe along with the tool string, the movable locking block (7) enters the working barrel to finish fixing, and the V-shaped sealing ring (11) finishes primary sealing with the inner wall of the oil pipe; after a well is opened, the front-back pressure difference of the throttling production device pushes a bottom cap (19), the bottom cap (19) pushes a sand prevention cover (17), the sand prevention cover (17) pushes a support body (12), and the support body (12) extrudes a V-shaped sealing ring (11) to continue to expand to complete secondary sealing; gas enters along the radial slot of the sand prevention cover (17) and completes decompression and throttling through the central pore of the air tap (14);
salvaging state
During fishing, the operation steel wire tool string is connected with the SD fishing tool, the SD fishing tool enters a groove on the inner wall of the upper part of the fishing head (2) along with the falling inertia of the tool string and then upwards shocks the tool string, the SD fishing tool drives the fishing head (2) to upwards move, the C-shaped ring (5) slides out of a groove on the inner wall of the lock block body (6) and upwards moves along with the fishing head (2), the movable lock block (7) loses support and is released from a preset working barrel, the tool string is continuously lifted, a boss on the inner wall of the middle part of the fishing head (2) drives the baffle ring (4) to upwards move, the baffle ring (4) drives the lock cap (3) to upwards move integrally, meanwhile, the V-shaped sealing ring (11) leaves a sealing section of the preset working barrel and keeps the state;
full lifecycle production state
In the production process of a gas well, a tool string is adopted to downwards hit a gas nozzle seat (15) to drive a gas nozzle (14) and a pressing cap (16) to downwards move, a first shear pin (13) is cut off, the tool string is continuously downwards hit, the pressing cap (16) extrudes a bottom cap (19) to cut off a second shear pin (18), the gas nozzle seat (15), the gas nozzle (14), the pressing cap (16) and the bottom cap (19) all fall into the well bottom, and at the moment, a gas production channel with the diameter of phi 25mm is kept in a throttling production device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312797.8A CN111075407B (en) | 2019-12-18 | 2019-12-18 | Underground throttling production device for gas well full life cycle and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312797.8A CN111075407B (en) | 2019-12-18 | 2019-12-18 | Underground throttling production device for gas well full life cycle and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111075407A true CN111075407A (en) | 2020-04-28 |
| CN111075407B CN111075407B (en) | 2024-01-30 |
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| CN111691862A (en) * | 2020-07-08 | 2020-09-22 | 中国石油天然气股份有限公司 | Multifunctional underground throttle free of rope throwing and fishing |
| CN112343564A (en) * | 2020-11-03 | 2021-02-09 | 中国石油天然气股份有限公司 | Gas well underground throttler air faucet automatic falling mechanism and use method |
| CN114482942A (en) * | 2022-02-04 | 2022-05-13 | 四川大学 | High-pressure gas well side-through gas storage type layered depressurization device |
| CN117365343A (en) * | 2023-11-03 | 2024-01-09 | 西安石油大学 | Setting anchor device and downhole choke having the same |
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| CN111691862A (en) * | 2020-07-08 | 2020-09-22 | 中国石油天然气股份有限公司 | Multifunctional underground throttle free of rope throwing and fishing |
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| CN114482942A (en) * | 2022-02-04 | 2022-05-13 | 四川大学 | High-pressure gas well side-through gas storage type layered depressurization device |
| CN114482942B (en) * | 2022-02-04 | 2022-09-27 | 四川大学 | High-pressure gas well side-through gas storage type layered pressure reduction device |
| CN117365343A (en) * | 2023-11-03 | 2024-01-09 | 西安石油大学 | Setting anchor device and downhole choke having the same |
| CN117365343B (en) * | 2023-11-03 | 2024-04-23 | 西安石油大学 | Setting anchor device and downhole choke having the same |
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