CN112302615A - Underground water drainage and gas production device and tubular column - Google Patents
Underground water drainage and gas production device and tubular column Download PDFInfo
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- CN112302615A CN112302615A CN201910687840.2A CN201910687840A CN112302615A CN 112302615 A CN112302615 A CN 112302615A CN 201910687840 A CN201910687840 A CN 201910687840A CN 112302615 A CN112302615 A CN 112302615A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 28
- 238000000034 method Methods 0.000 claims description 18
- 210000000078 claw Anatomy 0.000 claims description 17
- 238000011084 recovery Methods 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 70
- 239000012530 fluid Substances 0.000 description 10
- 239000003292 glue Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 238000012856 packing Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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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
- 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
- E21B43/121—Lifting well fluids
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention provides an underground drainage gas production device and a tubular column, wherein the underground drainage gas production device comprises an upper connector, a central cylinder, a first clamping hanging piece, a setting assembly and a first flow passage, wherein the central cylinder is arranged at the lower end of the upper connector in a communicating mode, the first clamping hanging piece is sleeved on the outer side of the central cylinder, the setting assembly is sleeved on the outer side of the central cylinder and is positioned at the lower end of the first clamping hanging piece, the first flow passage can be communicated with an inner cavity of the central cylinder, the underground drainage gas production device is in a spiral mode, the underground drainage gas production device is in a rear-mounted mode, a second clamping hanging piece matched with the underground drainage gas production device can be firstly put into a shaft, when throttling is needed, the underground drainage gas production device is put into the shaft, and the second clamping hanging piece is in a tubular.
Description
Technical Field
The invention relates to the technical field of natural gas well downhole tools, in particular to a downhole drainage and gas production device and a tubular column.
Background
The drainage gas recovery process technology is one of important measures for exploiting the production potential of gas wells with water-gas reservoirs and improving the gas reservoir recovery ratio.
In the prior art, equipment such as an electric submersible pump, a jet pump, a screw pump and the like can be used for completing drainage and gas production, but the process needs external energy and the utilized device has a complex structure; foam drainage gas recovery can also be used, but this process causes contamination of the formation.
Therefore, the need for an underground drainage and gas production device which has a simple structure and does not cause stratum pollution is an urgent technical problem to be solved.
Disclosure of Invention
The invention provides a downhole water drainage and gas production device and a tubular column aiming at part or all of the technical problems in the prior art. The underground drainage gas production device is constructed in a rear-mounted mode, a second clamping and hanging piece which can be matched with the underground drainage gas production device can be put into a shaft firstly, and the underground drainage gas production device is put into the underground drainage gas production device when drainage gas production is needed. And the second fastener which is put in first is cylindrical, and the inner drift diameter of the tubular column and later-stage operation are not influenced. Meanwhile, the device can generate rotational flow by itself, external energy is not needed, and the process utilizing the device does not pollute the stratum and is environment-friendly.
According to a first aspect of the present invention, there is provided a downhole water drainage and gas production device comprising:
an upper joint is arranged on the upper end of the connecting rod,
a central cylinder which is arranged at the lower end of the upper joint in a communicating way,
a first clamping and hanging piece sleeved on the outer side of the central cylinder,
a setting component sleeved outside the central cylinder and positioned at the lower end of the first clamping and hanging piece,
a first flow passage capable of being communicated with the inner cavity of the central cylinder,
wherein the first flow channel is configured as a spiral.
In one embodiment, a rotational flow component is fixedly arranged at the tail end of the central cylinder, and comprises a rotational flow jacket and a rotational flow column sleeved in an inner cavity of the rotational flow jacket, wherein a spiral groove is formed in the outer wall of the rotational flow column to form a first flow passage with the rotational flow jacket.
In one embodiment, a reducing opening is arranged in the inner cavity of the rotational flow jacket at the upper end of the rotational flow column, and the flow area of the reducing opening is gradually reduced from bottom to top.
In one embodiment, the first snap hook includes a first snap hook body, circumferentially spaced resilient fingers extending axially upward from the first snap hook body, and a first snap portion disposed on a peripheral wall of the resilient fingers.
In one embodiment, a setting assembly has:
an upper end of the upper rubber cylinder seat is sleeved between the central cylinder and the first clamping hanging piece and is connected with the first clamping hanging piece through a first shearing pin,
a lower rubber cylinder seat which is fixedly arranged on the outer wall of the central cylinder,
and the upper end surface and the lower end surface of the rubber cylinder are respectively abutted against the upper rubber cylinder seat and the lower rubber cylinder seat, and the rubber cylinder is compressed and radially expanded in the process that the lower rubber cylinder seat axially moves upwards relative to the upper rubber cylinder seat.
In one embodiment, a first ratchet locking device is arranged between the upper rubber cylinder seat and the first clamping and hanging piece,
and/or a second ratchet locking device is arranged between the upper rubber barrel seat and the central barrel.
In one embodiment, an avoiding groove used for being matched with the elastic claw is formed in the outer wall of the middle section of the central cylinder, a reaming hole extending along the axis is formed in the upper end of the central cylinder, and the lower end of the reaming hole is communicated with the avoiding groove.
In one embodiment, a fishing head is arranged in the inner cavity of the upper connector, a first step surface which enables the diameter of the outer wall of the lower end to be larger than that of the outer wall of the upper end is arranged on the outer wall of the fishing head, the fishing head below the first step surface is connected with the central cylinder through a fourth shearing pin, and a limiting ring which is located above the first step surface is arranged in the inner cavity of the central cylinder.
In one embodiment, the upper sub is connected to the central barrel by a third shear pin.
According to a second aspect of the present invention, there is provided a pipe string comprising one or more second tubular latching members, and at least one second latching member is capable of cooperating with the first latching member of the downhole water drainage and gas production apparatus.
Compared with the prior art, the underground drainage and gas production device has the advantages that the spiral first flow channel is communicated with the central cylinder, so that when underground fluid moves upwards along the device, the movement mode of the underground fluid can be changed, turbulent flow is converted into ordered vortex, gas-liquid two phases are separated, the pipeline pressure is reduced, the fluid energy attenuation speed is reduced, and the flow friction resistance and the slippage loss of an oil pipe are effectively reduced. Moreover, the device does not need external energy, is simple and convenient to operate and can not cause bottom hole pollution. Meanwhile, in the construction process, the second clamping and hanging piece which is matched with the second clamping and hanging piece can be put into the shaft firstly, and the underground drainage and gas production device is put into the shaft only when drainage and gas production are needed. The second clamping and hanging piece is cylindrical, the inner diameter of the second clamping and hanging piece is basically consistent with that of an oil pipe connected with the second clamping and hanging piece, and the inner drift diameter of the pipe column and the later-stage gas well operation are not affected. In addition, the underground water drainage and gas production device is matched with a pipe column which is put in firstly through clamping connection, the structure is simple, and the connection is reliable.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 shows a schematic view of a first operational state of a downhole water drainage and gas production apparatus according to an embodiment of the invention;
FIG. 2 illustrates a schematic diagram of a second operational state of a downhole water drainage and gas production device according to an embodiment of the invention;
FIG. 3 illustrates a third schematic operating condition of a downhole water drainage and gas production device according to an embodiment of the present invention;
FIG. 4 shows a schematic view of a fourth operating state of a downhole water drainage and gas production device according to an embodiment of the invention;
FIG. 5 shows a schematic diagram of a fifth operational state of a downhole water drainage and gas production device according to an embodiment of the invention;
FIG. 6 shows a central cartridge according to one embodiment of the present invention;
FIG. 7 is a cross-sectional view A-A from FIG. 6;
FIG. 8 is a cross-sectional view B-B from FIG. 6;
FIG. 9 is a schematic view from FIG. 6 in the direction of C;
in the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
FIG. 1 shows a downhole water drainage and gas production apparatus 100 according to the present invention. As shown in fig. 1, the apparatus 100 includes an upper fitting 1, a central cartridge 2, a first flow passage 3, a first snap member 4, and a setting assembly. Wherein, the upper joint 1 is in a cylinder shape and is used for connecting with other tools. The central cylinder 2 is connected with the upper joint 1 in a communicating way and is arranged at the lower end of the upper joint 1. The first fastener 4 is sleeved on the outer wall of the central tube 2 and is used for matching with a second fastener 200 of a pipe column (only the second fastener 200 of the pipe column is shown in the figure), so that fastening is realized to limit the position of the underground drainage and gas production device 100. The setting assembly is arranged on the outer side of the central cylinder and is positioned at the lower end of the first clamping and hanging piece 4 and used for blocking an annular space between the underground drainage and gas production device 100 and a pipe column. And the first flow passage 3 communicates with the inner cavity of the central cartridge 2. In addition, the first flow channel 3 is spiral, so that the passing fluid generates vortex benefits, gas-liquid two phases are separated, the pressure drop of the pipeline is reduced, the energy attenuation speed of the fluid is reduced, the original vertical upward turbulent flow state can be changed into spiral upward vortex laminar flow with the flow sectional area of the fluid reduced, and the flow friction and the slip loss of the oil pipe are effectively reduced.
The invention also relates to a pipe string. As shown in fig. 1, the pipe string includes a second hanger 200. The second hooking member 200 has a cylindrical structure, and a second hooking portion 201 is formed on an inner wall thereof. During construction, the second hanger 200 is first lowered into the wellbore following the pipe string. One or more second clamping hangers 200 can be arranged on the pipe column according to construction requirements, so that a tool such as the underground drainage and gas production device 100 is put into the pipe column to be clamped and matched with the second clamping hangers 200 in the gas production process. This also ensures that different tools are run at different times to match the second pendant 200 in the proper location downhole. This approach also ensures that multiple different or identical tools are run in at the same time to mate with the second pendant 200 at different locations.
In the construction process, the second tubular hanger 200 is set on the pipe string and is first lowered into the wellbore along with the pipe string. After fracturing construction is completed, the underground drainage and gas production device 100 is lowered into the pipe column according to the production management requirement of the oil-gas well. This way the downhole drainage gas production device 100 does not affect other gas well operations. Meanwhile, the underground drainage and gas production device 100 is put in later, and the inner diameter of the second clamping and hanging piece 200 which is put in first is basically consistent with the inner diameter of an oil pipe connected with the second clamping and hanging piece, so that the full drift diameter of the pipe column is not influenced. In addition, the underground drainage and gas production device 100 is connected with the second clamping piece 200 in a clamping and hanging mode, so that the connection stability is guaranteed, and the requirement for well deviation is lowered. And after the gas recovery device 100 is arranged in the underground drainage, the passing fluid generates vortex benefits, so that gas-liquid two phases are separated, the pressure drop of a pipeline is reduced, the energy attenuation speed of the fluid is reduced, the original vertical upward turbulent flow state can be changed into spiral upward vortex laminar flow with the flow sectional area of the fluid reduced, the flow friction and the slip loss of an oil pipe are effectively reduced, and the recovery ratio of a gas well is improved. Furthermore, according to the present invention, a plurality of second hangers 200 may be provided on the string, and a plurality of devices 100 may be lowered at a later stage to be respectively engaged with the corresponding second hangers 200, thereby extending and adjusting the length of the spiral flow path to meet the gas production needs.
In one embodiment, the first clip member 4 includes a first clip member body 41, an elastic claw 42, and a first clip portion 43. The first fastener body 41 is cylindrical and is sleeved outside the central cylinder 2. The elastic claw 42 extends axially upward from the first catch member body 41. A plurality of, for example, six elastic claws 42 are provided at intervals in the circumferential direction. The first catching portion 43 is provided on the outer peripheral wall of the elastic claw 42 and is configured as a radially protruding boss. Preferably, in order to increase the hooking stability, a plurality of, for example, two spaced first hooking portions 43 are provided in the axial direction. Correspondingly, the second hooking portion 201 is configured as a groove for mating with the first hooking portion 43. In the process of descending the underground drainage gas production device 100, the first clamping and hanging part 43 is stressed to enable the elastic claw 42 to radially contract so as to ensure that the underground drainage gas production device 100 smoothly descends. When the first hanging part 43 reaches the position of the second hanging part 201, under the action of the elasticity of the first hanging part 43, the elastic claw 42 radially expands, so that the first hanging part 43 enters the second hanging part 201 and is matched with the second hanging part to complete hanging, and the underground drainage and gas production device 100 is fixed. The clamping and hanging structure is simple and easy to realize. In addition, due to the above structural features, the unique correspondence of the snap-fit of the first snap fastener 4 and the second snap fastener 200 can be realized by changing the number, position, shape, size, and the like of the first snap fastener 43 and the corresponding second snap fastener 201. Therefore, a plurality of second hangers 200 having second hangers 201 of different structures or numbers can be lowered into the wellbore, and in the later construction process, the first hanger 4 matched with the second hanger 200 at an appropriate position can be selected to be lowered into the pipe string. Also, thus, different tools may be run at different times to match a second pendant 200 in the proper location downhole, or multiple different tools may be run at the same time to match a second pendant 200 in a different location.
As shown in fig. 1, the setting assembly has an upper cartridge mount 5, a lower cartridge mount 6, and a cartridge 7. The upper end of the upper rubber cylinder seat 5 is sleeved between the central cylinder 2 and the first clamping and hanging piece 4. The lower rubber cylinder seat 6 is fixedly arranged on the outer wall of the central cylinder 2. The lower terminal surface of last packing element seat 5 crosses the up end downward extension of lower packing element seat 6 to form the recess that is used for holding packing element 7 with the second step face 61 that forms on the outer wall of packing element seat 6 down, so that the up end of packing element 7 and the lower terminal surface butt of last packing element seat 5, and the lower terminal surface and the second step face 61 butt of packing element 7. Thus, during the upward axial movement of the lower cartridge seat 6 with respect to the upper cartridge seat 5, the cartridge 7 is compressed and expands radially to complete the setting. In addition, a first shear pin 11 is arranged between the upper cylinder seat 5 and the first hanging fastener 4 and used for limiting the first hanging fastener 4. Before the rubber sleeve 7 is actuated to be set, the first clamping and hanging piece 4 is fixed on the upper rubber sleeve seat 5, so that the rubber sleeve can be smoothly put into a pipe column. During setting of the actuating cylinder 7, the central cylinder 2 is pressed down to shear the first shear pin 11, so that the upper cylinder seat 5 can move axially downwards relative to the first catch member 4.
A first ratchet locking device 8 is arranged between the upper rubber cylinder seat 5 and the first clamping hanging piece 4. Preferably, the first ratchet locking means 8 has a first ratchet 81 and a first ratchet ring 82. Wherein, the first ratchet 81 is provided on the inner wall of the first card hanging member body 41. The first ratchet ring 82 is embedded in the outer wall of the upper cartridge holder 5. During the downward movement of the upper glue cylinder base 5 relative to the first card hanging member 4, the first ratchet ring 82 moves downward along with the upper glue cylinder base 5 and cooperates with the first ratchet 81 to lock the upper glue cylinder base 5 and the first card hanging member 4, so as to prevent the upper glue cylinder base 5 from moving upward relative to the first card hanging member 4. Further preferably, in order to guarantee a convenient connection, the upper cartridge seat 5 is provided as a separate piece. That is, the upper cartridge holder 5 is divided into an upper cartridge holder body 51 and a retaining ring 52. The first ratchet ring 82 is fitted into a groove formed by the upper cartridge holder body 51 and the locking ring 52. The above arrangement is simple and the assembly is convenient.
A second ratchet locking device 9 is arranged between the upper rubber barrel seat 5 and the central barrel 2. The second ratchet locking means 9 comprises a second ratchet ring 91 and a second ratchet seat 92. Wherein the second ratchet ring 91 is embedded in the outer wall of the central cartridge 2. Of course, for the convenience of installation, the second ratchet ring 91 is fitted into the groove between the fourth step surface 21 of the center cylinder 2 and the lower cylinder holder 6. And the second ratchet seat 92 is provided on the upper cartridge seat 5. In the process of setting the rubber cylinder 7, the central cylinder 5 and the lower rubber cylinder seat 6 move upwards relative to the upper rubber cylinder seat 5 to drive the second ratchet ring 91 to move upwards and complete locking with the second ratchet seat 92, so as to ensure the setting safety of the rubber cylinder 7 and prevent the rubber cylinder 7 from retracting.
Preferably, the second ratchet seat 92 is provided on the upper cartridge seat 5 by the second shear pin 10. When the second shear pin 10 is sheared, the upper cylinder holder 5 and the center cylinder 2 are unlocked, and the rubber cylinder 7 can be unlocked.
After the underground water drainage and gas production device 100 is completely put in and clamped, the upper joint 1 is pressed down. Since the upper joint 1 is connected with the central cylinder 2 through the clamping type step surface, the central cylinder 2 is forced downwards. Since the upper end surface of the upper cylinder holder 5 abuts against the third step surface 22 of the center cylinder 2, the upper cylinder holder 5 receives a downward force. At this time, since the first hooking portion 43 is hooked on the second hooking portion 202, the first hooking member 4 is fixed. And the force shears the first shearing pin 11, and the upper joint 1 drives the central cylinder 2 and the upper cylinder seat 5 to move downwards. During the downward movement of the upper glue cylinder base 5 relative to the first hooking member 4, the first ratchet ring 82 cooperates with the first ratchet 81, and the first ratchet locking device 8 operates to lock the relative position of the first hooking member 4 and the upper glue cylinder base 5. In the downward movement process of the upper joint 1, the lower rubber cylinder seat 6 is fixedly connected with the central cylinder 2, so that the lower rubber cylinder seat 6 moves downward along with the upper joint 1.
After the first ratchet locking means 8 is operated, the upper joint 1 is lifted up since the upper joint 1 is fixed to the central cylinder 2 by the third shear pin 12. In the process that the upper joint 1 drives the central cylinder 2 to move upwards, the lower rubber cylinder seat 6 moves upwards along with the central cylinder 2. Whereas the first hooking member 4 defines the upper cartridge seat 5, thanks to the first ratchet locking means 8. The lower cartridge seat 6 is thus moved upwards with respect to the upper cartridge seat 5 and compresses the cartridge 7 causing it to expand radially, setting. At this time, the rubber sleeve 7 seals an annular space between the downhole drainage and gas production device 100 and the second clamping member 200, so that gas can only flow through the first flow passage 3. And in the process of moving the upper rubber cylinder seat 5 upwards, the second ratchet locking device 9 is actuated to operate, so that the positions of the upper rubber cylinder seat 5 and the central cylinder 2 are limited, and the setting stability of the rubber cylinder 7 is ensured.
In one embodiment, as shown in fig. 6-9, the radial dimension of the outer wall of the lower section of the central cartridge 2 is smaller than the radial dimensions of the intermediate and upper sections. The lower section of the central cylinder 2 is used for arranging components such as a setting assembly and the like. An avoiding groove 23 is arranged on the outer wall of the middle section of the central cylinder 2, and a reaming hole 24 which extends axially is arranged at the upper end. Wherein the avoiding groove 23 is used for cooperating with the elastic claw 42 to provide a space for the elastic claw 42. Meanwhile, the lower end of the counterbore 24 is communicated with the avoiding groove 23, and the first clamping and hanging part 43 can be radially contracted into the avoiding groove 23 when being pressed in the process of descending the device 100. The above arrangement thus ensures that the device 100 can be dropped smoothly. Meanwhile, after the first clamping hanging piece 4 is matched with the second clamping hanging piece 200, in the process of pressing the upper connector 1 downwards, the upper end groove wall of the avoiding groove 23 can be seated on the upper end face of the first clamping hanging piece 4 so as to limit the central cylinder 2 to move downwards further. In addition, in the circumferential direction, the avoidance grooves 23 for cooperating with the elastic claws 42 are provided at intervals to increase the strength of the center tube 2 itself and ensure the stability of connection with the elastic claws 42.
In one embodiment, an overshot 13 is provided in the inner cavity of the upper connector 1. The outer wall of the fishing head 13 is provided with a first step surface 131, so that the diameter of the outer wall of the lower end of the fishing head 13 is larger than that of the outer wall of the upper end. The overshot 13 below the first step surface 131 extends axially downwards and is connected to the central barrel 2 by means of a fourth shear pin 14. A stop collar 15 is provided in the interior of the central cartridge 2. The stop collar 15 is located above the first step surface 131 to limit the fishing head 13 from moving further upward. During the process of descending the underground water and gas drainage and production device 100, the fishing head 13 is fixedly connected with the central cylinder 2 through the fourth shear pin 14. During setting of the actuating rubber cylinder 7, the upper connector 1 is pressed downwards, the fishing head 13 moves downwards relative to the first clamping hanging piece 4 together with the central cylinder 2 and enters the inner cavity of the elastic claw 42 part of the first clamping hanging piece 4, and the fishing head 13 abuts against the first clamping hanging part 43 at the avoidance groove 23 so as to limit radial contraction of the first clamping hanging part 43. Therefore, the fishing head 13 can increase the stability of the first clamping hanging piece 4 and the second clamping hanging piece 200, and the construction safety is ensured. When the fishing head 13 is lifted up, the fourth shear pin 14 is sheared, and the fishing head 13 moves upward relative to the center barrel 2 until the first step surface 131 abuts against the stopper ring 15. At this time, the radial restriction of the fishing head 13 on the first hooking part 43 is released, and the first hooking part 43 can be disengaged from the second hooking part 201.
In one embodiment, the upper end of the fishing head 13 is provided with a radially convexly extending fishing portion 132 for fishing operations. After the fishing tool 300 is lowered, the fishing tool forms a clamping fit with the fishing part 132, and the underground drainage and gas production device 100 is lifted out of the pipe column, so that the full drift diameter of the pipe column is ensured. That is to say, the underground drainage gas production device 100 according to the application has a salvage function, can realize the full drift diameter of the oil pipe, and guarantees the operation of the gas well in the later period. Moreover, the lower end surface of the fishing part 132 is set to be an inclined surface, after the fishing tool 300 is lowered, the fishing part 132 can form a ratchet-like fit with the fishing tool 300, so that the clamping stability is ensured, and the underground drainage and gas production device 100 can be safely and stably lifted out of the pipe column.
The upper joint 1 is pinned to the central tube 2 by a third shear 12. After the glue cartridge 7 is set, the top sub 1 may be lifted up to shear the third shear pin 12, thereby lifting the top sub 1 out of the string in preparation for subsequent fishing.
The first flow passage 3 is provided at the lower end of the center cylinder 2. Structurally, a rotational flow component is fixedly arranged at the tail end of the central cylinder 2. The swirl assembly comprises a swirl housing 31 and a swirl post 32. Wherein, the rotational flow jacket 31 is fixedly connected with the central cylinder 2, and the rotational flow column 32 is sleeved in the inner cavity of the rotational flow jacket 31. A spiral groove 33 is arranged on the outer wall of the swirling flow column 32. After the swirl post 32 is installed in the inner cavity of the swirl sleeve 31, the first flow channel 3 is formed at the groove 33. The arrangement is simple in structure and convenient to install. Of course, the grooves 33 may also be provided on the inner wall of the swirl jacket 31, or the grooves 33 may be provided both on the inner wall of the swirl jacket 31 and on the outer wall of the swirl column 32. In short, any solution that can form a spiral flow passage and the spiral flow passage is communicated with the inner cavity of the central cylinder 2 may fall into the protection scope of the present invention.
In one embodiment, a constriction 34 is provided in the inner cavity of the swirl sleeve 31 at the upper end of the swirl post 32. Wherein the flow area of the throat 34 is gradually reduced in the direction from bottom to top. The arrangement is such that the fluid passes through the first flow passage 3 and enters the throat 34, where it is collected and transported upwardly.
The operation of the downhole drainage and gas production device 100 and associated tubing string is discussed in detail below with respect to fig. 1-9.
First, the second clip 200 is set on the pipe string, and then the pipe string is run into the wellbore. After the gas well is put in place, the second clamping and hanging piece 200 is cylindrical, so that the operation of other gas wells is not influenced.
When water drainage and gas production are needed, the underground water drainage and gas production device 100 is lowered into the pipe column through the coiled tubing. During the running of the underground drainage gas production device 100, the elastic claws 42 radially contract and do not prevent the running of the underground drainage gas production device 100. When the first hooking portion 43 reaches the position of the second hooking portion 201, under the action of its own elasticity, the elastic claw 42 radially expands, so that the first hooking portion 43 and the second hooking portion 201 complete hooking, so as to fix the downhole drainage and gas production device 100, as shown in fig. 1.
Then, a force is applied to the upper joint 1 to press down the downhole drainage and gas production device 100. When the pressure reaches a certain value, the first shear pin 11 is sheared. At this time, the upper joint 1, the center cylinder 2, the upper cylinder holder 5, the rubber cylinder 7, and the lower cylinder holder 6 move downward relative to the first hooking member 4. During the downward movement, the first ratchet 81 is engaged with the first ratchet ring 82, and the first ratchet locking device 8 operates to lock the upper cartridge holder 5 to the first engaging member 4 until the upper end wall of the avoiding groove 23 is seated on the upper end surface of the first engaging member 4, so as to restrict the central cartridge 2 from further downward movement, as shown in fig. 2. In this process, the fishing head 13 moves down together with the central barrel 2, and its lower end enters the inner cavity of the first hooking member 4, defining the first hooking portion 43 preventing its radial contraction.
Then, the upper joint 1 is lifted, and the lower rubber cylinder seat 6 moves upwards along with the central cylinder 2 in the process that the upper joint 1 drives the central cylinder 2 to move upwards. Whereas the first hooking member 4 defines the upper cartridge seat 5, thanks to the first ratchet locking means 8. The lower cartridge seat 6 is thus moved upwards with respect to the upper cartridge seat 5 and compresses the cartridge 7 causing it to expand radially, setting. The set rubber sleeve 7 seals off the annulus between the downhole water and gas production device 100 and the pipe string, as shown in fig. 3. At this time, the second ratchet ring 91 and the second ratchet seat 92 can complete locking to prevent the rubber barrel 7 from backing up, and ensure the setting safety.
After the setting of the rubber cylinder 7 is completed, the feeding tool fed into the downhole water and gas production device 100 is lifted, and the third shear pin 12 is sheared to separate the central cylinder 2 and the upper joint 1. Thereby lifting the upper sub 1 out of the string as shown in figure 4. At this point, the gas flows upward through the first flow channel 3 provided under the center barrel 2, and the downhole drainage gas production apparatus 100 starts drainage gas production.
When water drainage and gas production are not needed, a fishing tool can be put in, and the underground water drainage and gas production device 100 is fished out to form a pipe column so as to realize full drift diameter. Specifically, the fishing tool 300 is lowered, and the fishing tool 300 is depressed. The fishing teeth of the fishing tool 300 pass over the fishing portion 132 of the fishing head 13 by the force, and move down to apply the force to the upper end surface of the center barrel 2. Under the action of force, the first hooking part 4 cannot move down because the first hooking part 43 is defined. Meanwhile, the upper rubber cylinder seat 5 cannot move downwards due to the limitation of the setting of the rubber cylinder 7. When the force reaches a certain value, the second shearing pin 10 is sheared, and the second ratchet seat 92 is separated from the upper cylinder seat 5, so that the central cylinder 2 with the second ratchet locking device 9 and the lower cylinder seat 6 moves downwards, and the rubber cylinder 7 is unsealed. After the glue cartridge 7 is unsealed, the fishing tool 300 is lifted. Because the fishing tool 300 is connected with the fishing head 13 in a clamping manner, the fishing tool 300 drives the fishing head 13 to move upwards until the fishing head 13 moves out of the inner cavity of the first clamping and hanging piece 4, and the first step surface 131 is in contact with the limiting ring 15. At this point, the resilient fingers 42 lose radial support of the fishing head 13. As shown in fig. 6. The center cylinder 2 is pulled upward and moved upward by the first step surface 131 and the retainer ring 15. The lower cartridge mount 6 moves up following the central cartridge 2. The upper cylinder shoe 5 is also subjected to an upward force, and the first hooking member 4 is subjected to an upward force, which causes the first hooking portion 43 to radially contract and move out of the second hooking portion 201, in cooperation with the first ratchet locking means 8. The first clamping and hanging piece 4 moves upwards along with the upper rubber cylinder seat 5. Thus, the downhole drainage and gas production device 100 can be lifted out of the string by the fishing tool 300, thereby achieving a full bore.
In the present application, the terms "up" and "down" are used with reference to the actual operating orientation of the downhole drainage and gas production device 100.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A downhole water drainage and gas production device, comprising:
an upper joint is arranged on the upper end of the connecting rod,
a central cylinder which is arranged at the lower end of the upper joint in a communicating way,
a first clamping and hanging piece sleeved on the outer side of the central cylinder,
a setting component sleeved outside the central cylinder and positioned at the lower end of the first clamping and hanging piece,
a first flow passage capable of communicating with the inner cavity of the central cylinder,
wherein the first flow channel is configured as a spiral.
2. The downhole water drainage and gas production device according to claim 1, wherein a swirl component is fixedly arranged at the tail end of the central cylinder, the swirl component comprises a swirl jacket and a swirl column sleeved in an inner cavity of the swirl jacket, and a spiral groove is arranged on the outer wall of the swirl column to form the first flow passage with the swirl jacket.
3. A downhole water drainage and gas production device according to claim 2, wherein a throat is provided in the inner cavity of the swirl sleeve at the upper end of the swirl column, and the flow area of the throat becomes gradually smaller in the direction from bottom to top.
4. A downhole water drainage and gas production device according to any one of claims 1 to 3, wherein the first catch member includes a first catch member body, circumferentially spaced elastic claws extending axially upward from the first catch member body, and first catch portions provided on an outer peripheral wall of the elastic claws.
5. A downhole water and gas production apparatus according to any of claims 1 to 4, wherein the setting assembly has:
an upper rubber cylinder seat, the upper end of which is sleeved between the central cylinder and the first clamping and hanging piece and is connected with the first clamping and hanging piece through a first shearing pin,
a lower rubber cylinder seat which is fixedly arranged on the outer wall of the central cylinder,
and the upper end surface and the lower end surface of the rubber cylinder are respectively abutted against the upper rubber cylinder seat and the lower rubber cylinder seat, and the rubber cylinder is compressed and radially expanded in the process that the lower rubber cylinder seat axially moves upwards relative to the upper rubber cylinder seat.
6. A downhole drainage and gas production device according to claim 5, wherein a first ratchet locking device is provided between the upper rubber cylinder seat and the first catch piece,
and/or a second ratchet locking device is arranged between the upper rubber barrel seat and the central barrel.
7. A downhole water drainage and gas production device according to claim 4, wherein an avoiding groove for matching the elastic claw is formed in the outer wall of the middle section of the central cylinder, a counterboring extending along the axis is formed in the upper end of the central cylinder, and the lower end of the counterboring is communicated with the avoiding groove.
8. A downhole water drainage and gas production device according to claim 7, wherein a fishing head is provided in the inner cavity of the upper joint, a first step surface is provided on the outer wall of the fishing head so that the diameter of the outer wall of the lower end is larger than that of the outer wall of the upper end, the fishing head below the first step surface is connected with the central cylinder by a fourth shear pin, and a retainer ring above the first step surface is provided in the inner cavity of the central cylinder.
9. A downhole water and gas production device according to any of claims 1 to 8, wherein the upper joint and the central cylinder are connected by a third shear pin.
10. A pipe string comprising one or more second tubular catches, and at least one of said second catches being engageable with a first catch of a downhole drainage and gas recovery device according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910687840.2A CN112302615A (en) | 2019-07-29 | 2019-07-29 | Underground water drainage and gas production device and tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910687840.2A CN112302615A (en) | 2019-07-29 | 2019-07-29 | Underground water drainage and gas production device and tubular column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112302615A true CN112302615A (en) | 2021-02-02 |
Family
ID=74329367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910687840.2A Withdrawn CN112302615A (en) | 2019-07-29 | 2019-07-29 | Underground water drainage and gas production device and tubular column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112302615A (en) |
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| CN112832725A (en) * | 2021-03-22 | 2021-05-25 | 中国石油天然气集团有限公司 | Water drainage gas production device |
| CN116025552A (en) * | 2021-10-27 | 2023-04-28 | 中国石油化工股份有限公司 | Drainage gas production plunger braking system |
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| CN116025552A (en) * | 2021-10-27 | 2023-04-28 | 中国石油化工股份有限公司 | Drainage gas production plunger braking system |
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Application publication date: 20210202 |