CN112302585A - Choke and tubular column - Google Patents
Choke and tubular column Download PDFInfo
- Publication number
- CN112302585A CN112302585A CN201910688125.0A CN201910688125A CN112302585A CN 112302585 A CN112302585 A CN 112302585A CN 201910688125 A CN201910688125 A CN 201910688125A CN 112302585 A CN112302585 A CN 112302585A
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- central
- cylinder
- seat
- restrictor
- wall
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- 238000000034 method Methods 0.000 claims description 19
- 210000000078 claw Anatomy 0.000 claims description 16
- 238000010008 shearing Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 13
- 239000003292 glue Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 238000012856 packing Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002343 natural gas well Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000013404 process transfer Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
Images
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
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- 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)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention provides a throttleer and a tubular column, wherein the throttleer comprises an upper joint, a central cylinder and a throttling nozzle, wherein the central cylinder is arranged at the lower end of the upper joint in a communicating mode, the throttling nozzle is arranged at the lower end of the central cylinder in a communicating mode, a first clamping hanging piece is sleeved on the outer side of the central cylinder, and the throttleer is provided with the throttling nozzle, so that the throttleer can reduce the risk of ice blockage and prolong the service life of a gas well.
Description
Technical Field
The invention relates to the technical field of downhole tools of natural gas wells, in particular to a restrictor and a pipe column.
Background
In the production process of the natural gas well, the throttling and pressure reduction of the shaft are realized by adopting an underground throttling process. The process transfers the ground throttling process into a shaft, can heat low-temperature natural gas by using the formation temperature, enables the temperature after throttling to be basically recovered to the formation temperature of the depth of the shaft, reduces the risk of ice blockage, and is an effective way for prolonging the production life of a gas well.
The key technology of the underground throttling process is that the structural design of the underground throttling device reasonably and directly influences the success or failure of the implementation of the throttling process. In the prior art, a production string containing a choke is run to a predetermined depth. The position of the throttler is fixed, the inner drift diameter of the production string is reduced, and the later-stage gas well operation is not facilitated.
Disclosure of Invention
The invention provides a choke and a pipe column aiming at part or all of the technical problems in the prior art. The choke is constructed in a rear-mounted mode, a second clamping and hanging piece which can be matched with the choke can be firstly put into a shaft, and the choke is put into the shaft when the choke is needed. And the main part of the second clamping and hanging piece is cylindrical, and the inner drift diameter of the pipe column and later-stage operation are not influenced.
According to a first aspect of the present invention, there is provided a choke 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 throttle nozzle which is arranged at the lower end of the central cylinder in a communicating way,
wherein, the first clamping and hanging piece is sleeved on the outer side of the central cylinder.
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 is provided on a lower end outer wall of the central cartridge, the setting assembly having:
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 locking device is arranged between the upper rubber cylinder seat and the first clamping and hanging piece,
and/or a second 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 center cylinder, an axially extending reaming hole is formed in the upper end of the center cylinder, and the lower end of the reaming hole is communicated with the avoiding groove.
In one embodiment, the second locking means comprises:
a second ratchet ring embedded in the outer wall of the central cylinder,
and the second ratchet seat is arranged on the upper rubber barrel seat through a second shearing pin and can be matched with the second ratchet ring.
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 end of the fishing head is provided with a radially protrudingly extending fishing part, the lower end face of which is configured as a slope inclined outward in the top-down direction.
In one embodiment, the upper sub is connected to the central barrel by a third shear pin.
According to a second aspect of the invention, there is provided a pipe string comprising a second clip, which may be one or more, and at least one of which is capable of cooperating with the first clip of the choke.
Compared with the prior art, the throttling device has the advantages that the throttling device is provided with the throttling nozzle, so that the risk of ice blockage can be reduced and the production life of a gas well can be prolonged. Meanwhile, the throttling device is designed to be a rear-mounted type. In the construction process, the second clamping and hanging piece which can be matched with the second clamping and hanging piece can be firstly put into a shaft, and the throttling device is put into the shaft when throttling is needed. And the main part of the second clamping and hanging piece is cylindrical, so that the inner drift diameter of the tubular column and the later-stage gas well operation are not influenced. In addition, the throttler is matched with a pipe column which is put in firstly through clamping and hanging connection, and the throttler is simple in structure and reliable in connection.
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 first operating state diagram of a throttle according to an embodiment of the invention;
FIG. 2 shows a second schematic operating condition of the choke in accordance with one embodiment of the present invention;
FIG. 3 shows a third schematic operating condition of the choke in accordance with one embodiment of the present invention;
FIG. 4 shows a fourth operating condition schematic of the choke in accordance with one embodiment of the present invention;
FIG. 5 shows a schematic diagram of a fifth operating state of the choke in accordance with an embodiment of the present invention;
FIG. 6 shows a sixth operational condition schematic of the choke in accordance with one embodiment of the present invention;
FIG. 7 shows a central cartridge according to one embodiment of the present invention;
FIG. 8 is a cross-sectional view A-A from FIG. 7;
FIG. 9 is a cross-sectional view B-B from FIG. 7;
FIG. 10 is a schematic view from FIG. 7 in the direction of C;
the reducer 100, the upper joint 1, the central cylinder 2, the reducer nozzle 3, the first hanger 4, the first hanger body 41, the elastic claw 42, the first hanger 43, the upper cylinder seat 5, the lower cylinder seat 6, the rubber cylinder 7, the second step surface 61, the first shearing pin 11, the first locking device 8, the first ratchet 81, the first ratchet seat 82, the upper cylinder seat body 51, the locking ring 52, the second locking device 9, the second ratchet ring 91, the second ratchet seat 92, the fourth step surface 21, the second shearing pin 10, the third step surface 22, the avoiding groove 23, the counterbore 24, the fishing head 13, the first step surface 131, the fourth shearing pin 14, the limiting ring 15, the fishing part 132, the third shearing 12 and the pressing cap 16; a second card hanging member 200 and a second card hanging part 201; a fishing tool 300;
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 throttle 100 according to the present invention. As shown in fig. 1, the throttle 100 includes an upper joint 1, a center cylinder 2, a throttle nipple 3, and a first latch 4. 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 and is arranged at the lower end of the upper joint 1. The central cylinder 2 is cylindrical and communicates with the upper joint 1. The throttling nozzle 3 is arranged at the lower end of the central cylinder 2 and is communicated with the central cylinder 2 for generating throttling action. The first latch member 4 is disposed on the outer wall of the central tube 2 and is adapted to cooperate with a second latch member 200 of a pipe string (only a second latch member 200 portion of the pipe string is shown) to latch to define the position of the choke 100.
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 snap-in hangers 200 can be provided on the pipe string according to construction needs, so that a tool such as the choke 100 can be put in to be snap-fitted with the second snap-in hangers 200 during the production of oil gas. 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 the fracturing construction is complete, the choke 100 is run into the interior of the tubular string as needed for production management of the oil and gas well. This way the choke 100 does not affect other gas well operations. Meanwhile, the choke 100 is put in after, so that the full drift diameter of the pipe column is not influenced. In addition, the throttle 100 is connected with the second clamping and hanging piece 200 in a clamping and hanging mode, so that the connection stability is guaranteed, and the requirement for well deviation is lowered. In addition, after the choke 100 is arranged, the choke 3 plays a throttling role, so that the risk of ice blockage is reduced, and the production life of a gas well is prolonged.
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 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. During the process of inserting the throttle 100, the first hooking portion 43 is stressed to make the elastic claw 42 radially contract, so as to ensure that the throttle 100 is inserted smoothly. When the first hooking portion 43 reaches the position of the second hooking portion 201 matched with the first hooking portion 43, under the action of the elastic force of the first hooking portion, the elastic claw 42 radially expands, so that the first hooking portion 43 enters the second hooking portion 201 and completes hooking in a matching manner, and the throttle 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 clamping pieces 200 with different second clamping parts 201 can be put into the shaft, and in the later construction process, the first clamping piece 4 matched with the second clamping piece 200 in the proper position can be selected to be put into the pipe column. Or a different tool may be run at different times to match the second snap hanger 200 in place downhole. Or multiple different tools may be run at the same time to match a second pendant 200 at a different location.
And a setting assembly is arranged on the outer wall of the lower section of the central cylinder 2 and is used for blocking an annular space between the choke 100 and a pipe column so as to ensure a good throttling effect. 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 locking device 8 is arranged between the upper rubber cylinder seat 5 and the first clamping hanging piece 4. Preferably, the first locking means 8 has a first ratchet 81 and a first ratchet seat 82. Wherein the first ratchet 81 is provided on the inner wall of the first hooking member 4. The first ratchet seat 82 is embedded in the outer wall of the upper cartridge seat 5. During the process that the upper glue cylinder base 5 moves downwards relative to the first card hanging piece 4, the first ratchet base 82 moves downwards along with the upper glue cylinder base 5 and is matched with the first ratchet 81 to lock the upper glue cylinder base 5 and the first card hanging piece 4 so as to prevent the upper glue cylinder base 5 from moving upwards relative to the first card hanging piece 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 can be divided into an upper cartridge holder body 51 and a retaining ring 52. The first ratchet seat 82 is fitted into a groove formed by the upper cartridge seat body 51 and the locking ring 52. The above arrangement is simple and the assembly is convenient.
A second locking device 9 is arranged between the upper glue cylinder seat 5 and the central cylinder 2. Preferably, the second 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 setting process of the rubber cylinder 7, the central cylinder 2 and the lower rubber cylinder seat 6 move upwards relative to the upper rubber cylinder seat 5, and the second ratchet ring 91 and the second ratchet seat 92 can complete locking so as to ensure the setting safety of the rubber cylinder 7 and improve the throttling effect. Further preferably, the second ratchet seat 92 is provided on the upper glue cylinder 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 throttle 100 is completely inserted and engaged, 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 process that the upper glue cylinder base 5 moves downwards relative to the first clamping hanging piece 4, the first ratchet 81 is matched with the first ratchet base 82, and the first locking device 8 operates to lock the relative positions of the first clamping hanging piece 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 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. And the first hooking member 4 defines the upper cartridge seat 5 to follow the upward movement of the central cartridge 2, thanks to the first 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 closes the annular space between the restrictor 100 and the second clip 200, so that gas can only flow through the restrictor nozzle 3. And in the process of moving the upper rubber cylinder seat 5 upwards, the second 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. 7-10, 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 is used for arranging components such as a setting assembly and the like. And an axially extending escape groove 23 is provided on the outer wall of the middle section of the central cylinder 2. An axially extending counterbore 24 is provided at the upper section. 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 escape groove 23 has a certain length in the axial direction to press the upper joint 1 downward in the process of the first catching member 4 catching, so that the center barrel 2 moves downward with respect to the first catching member 4. In addition, the lower end of the counterbore 24 communicates with the escape groove 23, and the first hooking portion 43 is compressed to be radially contracted into the escape groove 23 during the lowering of the restrictor 100. The above arrangement thus ensures that the restrictor 100 can be smoothly lowered. 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 disposed in the interior cavity of the upper connector 1, the overshot 13 extending downwardly into the counterbore 24. 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 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 lowering of the choke 100, the overshot 13 is fixedly connected to the central barrel 2 by means of the fourth shear pin 14. During setting of the actuating rubber cartridge 7, the upper connector 1 is pressed down, and the fishing head 13 moves downwards together with the central cartridge 2 relative to the first catch member 4 and enters the inner cavity of the elastic claw 42 portion of the first catch member 4. The fishing head 13 abuts against the first hooking portion 43 at the escape groove 23 to restrict radial contraction of the first hooking portion 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. The lower end face of the fishing part 132 is configured as a slope inclined outward in the top-down direction. After the fishing tool 300 is run in, it forms a snap fit with the fishing portion 132 and lifts the choke 100 out of the tubular string, thereby ensuring a full bore of the tubular string. That is to say, the choke 100 according to the application has a fishing function, can realize the full latus rectum of oil pipe, guarantees the operation of later stage gas well. Moreover, the lower end surface of the fishing part 132 is set to be an inclined surface, and 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 choke 100 can be safely and stably lifted out of a pipe string.
The upper joint 1 is pinned to the central tube 2 by a third shear 12. After the glue barrel 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, exposing the fishing portion 132 in preparation for subsequent fishing.
The throttle nozzle 3 is arranged in the inner cavity of the lower rubber cylinder base 6 and is communicated with the central cylinder 2 through the inner cavity of the lower rubber cylinder base 6. For example, the position of the throttle valve 3 may be defined by a press cap 16 communicating with the throttle valve 3, and the press cap 16 is fixedly connected with the lower cartridge holder 6.
The operation of the choke 100 and associated pipe string is discussed in detail below with respect to FIGS. 1 through 10.
First, a plurality of or one second hangers 200 are 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 choke is required, the choke 100 is run into the tubular string through coiled tubing. During the run-in of the choke 100, the resilient fingers 42 radially contract and do not interfere with the run-in of the choke 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 throttle 100, as shown in fig. 1.
Next, the choke 100 is pressed down by pressing the upper joint 1. 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. Due to the arrangement of the escape groove 23, the center cylinder 2 interferes with the first catch 4 at the beginning of downward movement. During the downward movement, the first ratchet 81 is engaged with the first ratchet seat 82, and the first locking device 8 operates to lock the upper cartridge holder 5 to the first hooking member 4, 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. And the first clamping and hanging piece 4 is limited by the first locking device 8 to move up the upper cylinder seat 5 along with the central cylinder 2. 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 packer 7 seals off the annulus between the choke 100 and the pipe string as shown in figure 3. At this time, the second ratchet ring 91 and the second ratchet seat 92 can complete locking to ensure the setting safety of the glue cartridge 7.
After the setting of the glue cartridge 7 is completed, the feed tool into the choke 100 is lifted up, shearing the third shear pin 12 to separate the central cartridge 2 and the upper sub 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 choke 3 provided below the center cylinder 2, and the choke 100 starts the choke operation.
When throttling is not needed, a fishing tool can be put in, and the choke 100 is fished out of the pipe column 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 cutting pin 10 is cut off, and the second ratchet seat 92 is separated from the upper cartridge seat 5, so that the central cartridge 2 with the second locking device 9 and the lower cartridge seat 6 moves downwards, and the cartridge 7 is unsealed, as shown in fig. 5.
After the glue cartridge 7 is unsealed, the fishing tool 300 is lifted. Since 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 member 4, and the first step surface 131 contacts with the limiting ring 15, at this time, the elastic claw 42 loses the 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 cartridge seat 5 is also subjected to an upward force, and, in cooperation with the first locking means 8, the first hooking member 4 is subjected to an upward force which causes the first hooking portion 43 to contract radially and actuates the first hooking member 4 to follow the upper cartridge seat 5 upward. Thus, the choke 100 can be lifted out of the tubular string by the fishing tool 300, thereby achieving full bore.
In the present application, the orientation terms "up" and "down" are used with reference to the actual operating orientation of the throttle 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 restrictor, 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 throttle nozzle which is arranged at the lower end of the central cylinder in a communicating way,
wherein, the first clamping and hanging piece is sleeved on the outer side of the central cylinder.
2. The restrictor of claim 1, wherein the first snap member includes a first snap member body, circumferentially spaced resilient fingers extending axially upwardly from the first snap member body, and a first snap portion disposed on an outer peripheral wall of the resilient fingers.
3. The restrictor of claim 1 or 2, wherein a setting assembly is provided on a lower end outer wall of the central barrel, the setting assembly having:
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.
4. The restrictor of claim 3, wherein a first locking device is provided between the upper cartridge mount and the first catch,
and/or a second locking device is arranged between the upper rubber cylinder seat and the central cylinder.
5. The restrictor according to claim 2, wherein an avoiding groove for matching with the elastic claw is arranged on the outer wall of the middle section of the central cylinder, an axially extending counterbore is arranged at the upper end of the central cylinder, and the lower end of the counterbore is communicated with the avoiding groove.
6. The restrictor of claim 4, wherein the second locking device comprises:
a second ratchet ring embedded within an outer wall of the central cartridge,
and the second ratchet seat is arranged on the upper rubber barrel seat through a second shearing pin and can be matched with the second ratchet ring.
7. The restrictor of claim 1, wherein a fishing head is disposed in the inner cavity of the upper joint, a first step surface is disposed on an outer wall of the fishing head such that a diameter of the outer wall of the lower end is greater than a diameter of the outer wall of the upper end, the fishing head below the first step surface is connected to the central barrel by a fourth shear pin, and a retainer ring is disposed in the inner cavity of the central barrel above the first step surface.
8. A restrictor according to claim 7 wherein the upper end of the fishing head is provided with a radially projecting extending fishing portion, the lower end face of which is configured as a ramp sloping outwardly in an up-down direction.
9. The restrictor of any of claims 1-8, wherein the upper fitting and the central barrel are connected by a third shear pin.
10. A pipe string comprising a second catch member, which may be one or more, and at least one of which is engageable with the first catch member of a choke according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910688125.0A CN112302585A (en) | 2019-07-29 | 2019-07-29 | Choke and tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910688125.0A CN112302585A (en) | 2019-07-29 | 2019-07-29 | Choke and tubular column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112302585A true CN112302585A (en) | 2021-02-02 |
Family
ID=74329449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910688125.0A Withdrawn CN112302585A (en) | 2019-07-29 | 2019-07-29 | Choke and tubular column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112302585A (en) |
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| CN203891852U (en) * | 2014-06-06 | 2014-10-22 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Sand blocking prevention downhole restriction choke easy to unlock |
| WO2016078181A1 (en) * | 2014-11-17 | 2016-05-26 | 杰瑞能源服务有限公司 | Coiled tubing velocity string and method for gas recovery by liquid unloading |
| CN107060702A (en) * | 2016-12-29 | 2017-08-18 | 中国石油天然气股份有限公司 | A kind of coupling type underground throttle device |
| CN207033401U (en) * | 2017-06-28 | 2018-02-23 | 中国石油化工股份有限公司 | A kind of plugging device, it is located pipe nipple and tubing string |
| CN109057749A (en) * | 2018-07-30 | 2018-12-21 | 中国石油天然气股份有限公司 | A kind of easy fishing slip formula underground throttle device |
| CN109138900A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of plugging device is located pipe nipple and cooperating equipment |
| CN208966306U (en) * | 2018-08-28 | 2019-06-11 | 中国石油天然气股份有限公司 | Underground throttle device and gas production tubing string |
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2019
- 2019-07-29 CN CN201910688125.0A patent/CN112302585A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203891852U (en) * | 2014-06-06 | 2014-10-22 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Sand blocking prevention downhole restriction choke easy to unlock |
| WO2016078181A1 (en) * | 2014-11-17 | 2016-05-26 | 杰瑞能源服务有限公司 | Coiled tubing velocity string and method for gas recovery by liquid unloading |
| CN107060702A (en) * | 2016-12-29 | 2017-08-18 | 中国石油天然气股份有限公司 | A kind of coupling type underground throttle device |
| CN207033401U (en) * | 2017-06-28 | 2018-02-23 | 中国石油化工股份有限公司 | A kind of plugging device, it is located pipe nipple and tubing string |
| CN109138900A (en) * | 2017-06-28 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of plugging device is located pipe nipple and cooperating equipment |
| CN109057749A (en) * | 2018-07-30 | 2018-12-21 | 中国石油天然气股份有限公司 | A kind of easy fishing slip formula underground throttle device |
| CN208966306U (en) * | 2018-08-28 | 2019-06-11 | 中国石油天然气股份有限公司 | Underground throttle device and gas production tubing string |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210202 |
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