CN116357273A - Underground throttle device with cylinder setting free from throwing and fishing - Google Patents
Underground throttle device with cylinder setting free from throwing and fishing Download PDFInfo
- Publication number
- CN116357273A CN116357273A CN202111617101.XA CN202111617101A CN116357273A CN 116357273 A CN116357273 A CN 116357273A CN 202111617101 A CN202111617101 A CN 202111617101A CN 116357273 A CN116357273 A CN 116357273A
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- China
- Prior art keywords
- cylinder
- wall
- throwing
- block body
- downhole choke
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 38
- 239000004576 sand Substances 0.000 claims abstract description 29
- 230000002265 prevention Effects 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 238000012856 packing Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 30
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
-
- 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
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- 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
- E21B43/35—Arrangements for separating materials produced by the well specially adapted for separating solids
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses an air cylinder setting throwing-free downhole throttler, which comprises a limiting structure, a sealing structure and a throttling structure, wherein the limiting structure is arranged on the lower side of the air cylinder; the limiting structure is connected with the sealing structure; the sealing structure is connected with the throttling structure; the limiting structure is used for fixing the position of the underground throttle; the sealing structure is used for sealing a space between the inner wall of the production pipe column and the outer wall of the downhole choke; the throttling structure is used for throttling and depressurizing the fluid in the production string of the gas well. According to the invention, the underground throttle is put in and salvaged without steel wire operation, and setting is realized by the pressure difference provided by the inside and outside of the cylinder; the service of the underground throttler is expired, and when the gas well does not need throttle production, the gas nozzle and the sand prevention cover can automatically fall off to form a central large channel; when the air tap and the sand prevention cover automatically fall off and fail, the air tap and the sand prevention cover can be mechanically knocked off to form a central large channel; meanwhile, the construction operations such as special throwing and salvaging of the underground throttler are reduced, the manpower and material resources are saved, and the cost is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of natural gas exploitation, and particularly relates to an air cylinder setting throwing-free downhole choke.
Background
In natural gas exploitation, for depressurization, throttling and production limiting, downhole throttlers are often installed on a production string of a gas well, and the downhole throttlers are divided into slip type and preset type in different seat sealing modes. The slip type throttler is put in through the operation of a well testing steel wire, is anchored at any position in a production pipe column in a setting way, and throttles production; when the production needs to be salvaged, the production is salvaged by connecting a salvaging tool through the well testing steel wire operation; the preset throttles are put in through the well testing steel wire operation, and are anchored in a preset working cylinder in a setting way (the preset working cylinder is connected to a production pipe column and is put into a well together with the production pipe column); when the production needs to be salvaged, the GS salvaging tool is connected through the well testing steel wire operation to salvage. The slip type throttler is widely applied in the early stage of the development of the threger gas field, and popularization and application show that the throttler is difficult to salvage, has a success rate of only 67 percent and is easy to cause underground accidents; the conventional preset type throttler is sealed by a rubber cylinder, so that the unlocking resistance is high during salvage, the salvage success rate is 75%, and the production requirement is not met yet. The increment of the throttler for fishing the suspicious well is increased year by year, 3000 surplus ports of the suspicious well are stored up to the present, and the post-treatment cost is huge. And because the fishing of the throttler is unsuccessful, the tool forms a bridge plug effect on the production string, so that drainage and gas production measures cannot be carried out, and the residual capacity of the gas well is seriously influenced.
Therefore, in order to ensure that the production of a gas well is not affected when the fishing of the downhole choke fails, and the cost is further reduced, a casting-and-fishing-free downhole choke without steel wire operation needs to be developed, casting and fishing of the steel wire operation are not needed, and when the gas well does not need to be produced by throttling when the service of the downhole choke is expired, the gas nozzle and the sand prevention cover can automatically fall off to form a central large channel; when the automatic falling of the air tap and the sand prevention cover fails, a central large channel can be formed by mechanical beating, so that the production requirements of implementation of the early throttling and depressurization and middle-later water and gas production measures of a gas well are met, meanwhile, the construction operation of a well site is reduced, the manpower and material resources are saved, and the operation cost is greatly reduced.
Disclosure of Invention
Aiming at the problems, the invention discloses an air cylinder setting throwing-free downhole choke, which comprises a limiting structure, a sealing structure and a choke structure;
the limiting structure is connected with the sealing structure;
the sealing structure is connected with the throttling structure;
the limiting structure is used for fixing the position of the underground throttle;
the sealing structure is used for sealing a space between the inner wall of the production pipe column and the outer wall of the downhole choke;
the throttling structure is used for throttling and depressurizing the fluid in the production string of the gas well.
Further, the limiting structure comprises a salvaging head, a locking cap, a baffle ring, a setting soluble pin, a locking block and a locking block body;
the salvaging head is connected with the locking block body through a setting soluble pin;
the lock cap, the baffle ring, the lock block and the lock block body are sequentially sleeved on the outer wall of the fishing head.
Still further, the fishing head outer wall is provided with first boss and second boss.
Further, the lock cap is connected with the lock block body;
the baffle ring is arranged in a concave table on the inner wall of the lock cap and is abutted with the lock block body.
Further, the outer wall of the salvaging head is provided with a strip-shaped groove, and the strip-shaped groove and the locking block form a first cylinder.
Further, a third boss is provided on an outer wall of the lock body.
Further, the sealing structure comprises a rubber cylinder, a main body, a sealing soluble pin and a connecting section;
the lock body, the rubber cylinder and the main body are sequentially sleeved on the outer wall of the connecting section;
the locking block body is connected with the connecting section;
the section of the rubber cylinder is trapezoid, and the inner wall of the rubber cylinder is provided with an arc-shaped groove which is abutted with the locking block body and the main body;
the body is connected to the connection section by a sealed dissolvable pin.
Further, the sealing structure further comprises a movable section, a shear pin, an inflating valve soluble pin, an outer cylinder, a spring and a center rod;
the connecting section, the movable section, the outer cylinder and the spring are sequentially sleeved on the central rod;
the main body, the connecting section and the movable section form a second cylinder;
one end of the movable section is connected with the main body, and the other end of the movable section is connected with the outer cylinder through a shear pin;
the outer cylinder is connected with the central rod through a soluble pin of an inflating valve.
Further, the throttling structure comprises a connecting sleeve, an air tap seat and a sand prevention cover;
one end of the connecting sleeve is connected with the central rod, and the other end of the connecting sleeve is provided with a convex groove;
the air tap and the air tap seat are sequentially placed in the convex groove of the connecting sleeve, and the air tap seat is connected with the connecting sleeve;
the sand prevention cover is connected with the connecting sleeve.
Further, the inner wall of one end of the sand control cover is provided with threads, the middle area is provided with radial slots, and the other end of the sand control cover is spherical.
Compared with the prior art, the invention has the beneficial effects that: the underground throttler is put in and salvaged without steel wire operation, and setting is realized by pressure difference provided inside and outside the cylinder; the service of the underground throttler is expired, and when the gas well does not need throttle production, the gas nozzle and the sand prevention cover can automatically fall off to form a central large channel; when the air tap and the sand prevention cover automatically fall off and fail, the air tap and the sand prevention cover can be mechanically knocked off to form a central large channel; the production requirements of implementation of the gas well early-stage throttling depressurization, middle-later-stage drainage and gas production measures are met; meanwhile, the construction operations such as special throwing and salvaging of the underground throttler are reduced, the manpower and material resources are saved, and the cost is greatly reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 illustrates a schematic diagram of a downhole choke in accordance with an embodiment of the invention;
FIG. 2 illustrates a downhole choke anchoring status schematic according to an embodiment of the invention;
FIG. 3 illustrates a schematic diagram of a downhole choke seal according to an embodiment of the invention;
FIG. 4 is a schematic diagram showing the structure of a downhole choke after the automatic drop of the air tap and sand control cover according to an embodiment of the invention;
FIG. 5 shows a schematic diagram of the structure of the downhole choke and sand control cap after mechanical removal according to an embodiment of the present invention.
Reference numerals: 1. a fishing head; 101. a first boss; 102. a second boss; 2. a locking cap; 3. a baffle ring; 4. setting a soluble pin; 5. a locking piece; 6. a lock body; 61. a third boss; 7. a rubber cylinder; 8. a main body; 9. sealing the soluble pin; 10. a connection section; 11. a movable section; 12. shearing nails; 13. inflating the soluble pin; 14. an outer cylinder; 15. a spring; 16. a central rod; 17. connecting sleeves; 18. an air tap; 19. an air tap seat; 20. sand prevention cover.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in FIG. 1, the cylinder setting throwing-free downhole choke provided by the invention comprises a limiting structure, a sealing structure and a choke structure;
the limiting structure is connected with the sealing structure;
the sealing structure is connected with the throttling structure;
the limiting structure is used for fixing the position of the underground throttle;
the sealing structure is used for sealing a space between the inner wall of the production pipe column and the outer wall of the downhole choke;
the throttling structure is used for throttling and depressurizing the fluid in the production string of the gas well.
The limiting structure comprises a salvaging head 1, a locking cap 2, a baffle ring 3, a setting soluble pin 4, a locking block 5 and a locking block body 6;
the fishing head 1 is connected with the lock body 6 through a setting soluble pin 4;
the lock cap 2, the baffle ring 3, the lock block 5 and the lock block body 6 are sequentially sleeved on the outer wall of the fishing head 1.
The outer wall of the fishing head 1 is provided with a first boss 101 and a second boss 102, and a groove is arranged between the first boss 101 and the second boss 102. The first boss 101 is disposed at a middle upper portion of the outer wall of the fishing head 1, and is used for being matched with the locking cap 2 to limit the position of the locking cap 2. The second boss 102 is arranged at the middle lower part of the outer wall of the fishing head 1 and is used for pushing the locking piece 5 and pushing the locking piece 5 out of the rectangular hole of the lock body 6. The outer wall of the lower end of the salvaging head 1 is provided with a strip-shaped groove, and a first cylinder is formed with the inner wall of the upper end of the locking block body 6. The first cylinder is low-pressure (atmospheric pressure) before the well is put into the well, after the well is put into the well, the setting soluble pin 4 is dissolved, the salvage head 1 is pushed to move downwards to push out the locking piece 5 under the action of high-pressure differential in the production pipe column, and the downhole choke is fixed.
The throwing and salvaging of the underground throttler are not required to be operated by steel wires, the setting of the underground throttler is realized by the pressure difference provided inside and outside the first cylinder, and the safety risk and the operation cost are reduced.
The lower end of the lock cap 2 is in threaded connection with the upper end of the lock block body 6 and is used for limiting the position of the baffle ring 3;
the baffle ring 3 is arranged in a concave table on the inner wall of the lock cap 2 and is abutted with the upper end of the lock block body 6, so that the position of the baffle ring 3 is limited. And the baffle ring 3 is used for preventing the salvage head 1 from being separated from the limiting structure.
The locking block 5 is arranged in a rectangular hole of the locking block body 6 and is used for being matched with a preset working cylinder in a gas well production pipe column to fix the downhole choke.
A third boss 61 is provided on the outer wall of the lower end of the lock body 6 for defining the position of the downhole choke within the production string.
The sealing structure comprises a rubber cylinder 7, a main body 8, a sealing soluble pin 9 and a connecting section 10;
the locking block body 6, the rubber cylinder 7 and the main body 8 are sequentially sleeved on the outer wall of the connecting section 10;
the inner wall of the lower end of the locking block body 6 is in threaded connection with the outer wall of the upper end of the connecting section 10;
the section of the rubber cylinder 7 is trapezoid, and the inner wall of the rubber cylinder is provided with an arc-shaped groove which is abutted with the locking block body 6 and the main body 8; the rubber cylinder 7 is an elastic component and is used for sealing a space between the inner wall of the production pipe column and the outer wall of the downhole choke; the arc-shaped groove can reduce the initial pressure of deformation of the rubber cylinder 7, and the downhole choke is assisted to seal for the first time;
the main body 8 is fixed on the connecting section 10 through a sealing soluble pin 9; the main body 8 is a member forming a second cylinder for pressing the packing element 7 to be elastically deformed.
A connecting section 10 for supporting the packing element 7 and for constructing a second cylinder.
The sealing structure also comprises a movable section 11, a shear pin 12, an inflating nozzle soluble pin 13, an outer cylinder 14, a spring 15 and a center rod 16;
the connecting section 10, the movable section 11, the outer cylinder 14 and the spring 15 are sequentially sleeved on the central rod 16;
the main body 8, the connecting section 10 and the movable section 11 form a second cylinder; the second cylinder is low-pressure (atmospheric pressure) before the production pipe is put into the well, the sealing soluble pin 9 is dissolved after the installation, the main body 8 is pushed to move upwards to extrude the rubber cylinder 7 to expand under the action of high-pressure differential in the production pipe column, and the space between the inner wall of the production pipe column and the outer wall of the downhole choke is sealed;
one end of the movable section 11 is in threaded connection with the lower end of the main body 8, and the other end of the movable section is connected with the outer cylinder 14 through a shear pin 12; a movable section 11 for constructing a second cylinder;
the outer cylinder 14 is connected with the central rod 16 through the inflating valve soluble pin 13. The central rod 16 primarily serves as a support and connection for the throttled high-speed fluid passage.
The throttling structure comprises a connecting sleeve 17, an air tap 18, an air tap seat 19 and a sand prevention cover 20;
one end of the connecting sleeve 17 is in threaded connection with the lower end of the central rod 16, and a convex groove is formed in the center of the lower end of the connecting sleeve 17;
the air tap 18 and the air tap seat 19 are sequentially placed in the convex groove of the connecting sleeve 17, and the air tap seat 19 is in threaded connection with the connecting sleeve 17;
the sand control cover 20 is in threaded connection with the connecting sleeve 17.
The air tap 18 is a hollow cylinder, the air tap seat 19 is a T-shaped cylinder with threads on the outer wall, the inner wall of the upper end of the sand control cover 20 is provided with threads and is used for being connected with the connecting sleeve 17, a plurality of radial slots are arranged in the middle area, and the lower end of the sand control cover is spherical. The total area of the radial slots meets the production flow requirement of the gas well, and meanwhile, sand from the production pipe column can be prevented from entering the underground throttle and the production pipe column above.
When the gas well with the service expiration of the underground throttler does not need throttle production, the gas nozzle 18 and the sand control cover 20 can automatically fall off to form a central large channel; when the air tap 18 and the sand control cover 20 fail to automatically fall off, the air tap can be mechanically knocked off to form a central large channel.
After the downhole choke is assembled, the downhole choke is placed in the production pipe column through a wellhead guiding flow of a gas well, the downhole choke freely falls in the production pipe column until the downhole choke enters a special preset working cylinder, and the downhole choke stops falling in place due to the fact that a third boss 61 arranged on the outer wall of the lower end of the lock body 6 is limited.
As shown in fig. 2, after the downhole choke reaches the setting position, 30L of saline is injected from a wellhead, after 1 hour, the soluble pin 4 is dissolved and sheared, as the first cylinder with normal sealing pressure (atmospheric pressure) formed by the long strip-shaped groove at the lower end of the salvage head 1 and the inner wall at the upper end of the locking piece body 6 is acted by external high pressure (production pipe column pressure), the salvage head 1 slides downwards until the first boss 101 at the middle upper part of the salvage head 1 is attached to the upper end of the locking cap 2, the second boss 102 at the outer wall at the middle lower part of the salvage head 1 supports the locking piece 5 out of the rectangular hole of the locking piece body 6, the locking piece 5 is clamped into the groove at the inner wall of the preset working cylinder, and the downhole choke realizes anchoring.
As shown in fig. 3, after the downhole choke is anchored, the sealing soluble pin 9 is dissolved and sheared after 3 hours, the main body 8, the connecting section 10 and the movable section 11 form a sealing normal pressure (atmospheric pressure) second cylinder under the action of external high pressure (production string pressure), the main body 8 slides upwards, the rubber barrel 7 is extruded by the cone table at the upper end of the main body 8 to expand and deform, and then the rubber barrel 7 cuts off the outer wall of the locking block 6 and the gap between the outer wall of the main body 8 and the inner wall of the preset working barrel, so that sealing is realized, and meanwhile, the whole connecting components such as the main body 8, the movable section 11 and the central rod 16 slide upwards.
During well production, high-pressure natural gas sequentially flows through the sand prevention cover 20, the air nozzle seat 19 and the air nozzle 18, and then the medium-pressure natural gas throttled and depressurized through the air nozzle 18 sequentially flows through the connecting sleeve 17, the center rod 16, the connecting section 10, the locking block body 6 and the salvaging head 1, then enters the production pipe column and flows to the wellhead.
As shown in fig. 4, with the production of the gas well, the pressure of the production string gradually decreases, when the gas well does not need to be throttled and depressurized (about 1.5 years), the soluble pin 13 of the pumping nozzle is automatically dissolved and sheared (when the gas well is normally produced, the soluble pin 13 of the pumping nozzle is automatically dissolved after 1.5 years, if the gas well does not need to be throttled and the injected saline water is invalid in advance), the compressed spring 15 releases the elastic force to push the connecting sleeve 17 to move downwards, and the connecting sleeve 17 drives the central rod 16, the air nozzle 18, the air nozzle seat 19, the sand control cover 20 and other parts to move downwards integrally and fall into the bottom of the well, so that the air nozzle 18 falls off, the production string is smooth, and the production requirements of implementation of later drainage and gas production measures in the gas well are met.
As shown in fig. 5, with the production of the gas well, the pressure of a production string of a part of the gas well is reduced faster, and when the throttle and the pressure reduction are needed to be cancelled in advance (less than 1.5 years), when the air tap 18 and the sand control cover 20 fail to automatically fall off, the central rod 16 is jarred downwards through steel wire operation, the shear pin 12 is sheared, the central rod 16 drives the outer cylinder 14, the spring 15, the connecting sleeve 17, the air tap 18, the air tap seat 19, the sand control cover 20 and other parts to integrally move downwards, fall into a well bottom, the air tap 18 is fallen off, and a central large channel is realized.
The underground throttler meets the production requirements of implementation of the drainage and gas production measures at the early stage of the gas well; meanwhile, the construction operations such as special throwing and salvaging of the underground throttler are reduced, the manpower and material resources are saved, and the cost is greatly reduced.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature.
The term "coupled" is to be interpreted broadly, as being a fixed connection, a removable connection, or an integral connection, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art in a specific case.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The cylinder setting throwing-free downhole throttler is characterized by comprising a limiting structure, a sealing structure and a throttling structure;
the limiting structure is connected with the sealing structure;
the sealing structure is connected with the throttling structure;
the limiting structure is used for fixing the position of the underground throttle;
the sealing structure is used for sealing a space between the inner wall of the production pipe column and the outer wall of the downhole choke;
the throttling structure is used for throttling and depressurizing the fluid in the production string of the gas well.
2. The cylinder setting throwing-free downhole choke of claim 1, wherein the limiting structure comprises a fishing head (1), a locking cap (2), a baffle ring (3), a setting soluble pin (4), a locking block (5) and a locking block body (6);
the salvaging head (1) is connected with the locking block body (6) through a setting soluble pin (4);
the lock cap (2), the baffle ring (3), the lock block (5) and the lock block body (6) are sequentially sleeved on the outer wall of the fishing head (1).
3. The cylinder setting throwing-free downhole choke of claim 2, wherein the outer wall of the fishing head (1) is provided with a first boss (101) and a second boss (102).
4. A cylinder setting throwing-free downhole choke in accordance with claim 3, characterized in that the locking cap (2) is connected with a locking block body (6);
the baffle ring (3) is arranged in a concave table on the inner wall of the lock cap (2) and is abutted with the lock block body (6).
5. The cylinder setting throwing-free downhole choke of claim 2 or 4, wherein the outer wall of the fishing head (1) is provided with a strip-shaped groove, and the first cylinder is formed with the locking block body (6).
6. The cylinder setting throwing-free downhole choke of claim 5, wherein a third boss (61) is provided on an outer wall of the locking block body (6).
7. The cylinder setting, throwing-and-fishing-free downhole choke of claim 6, wherein the sealing structure comprises a packing element (7), a main body (8), a sealing soluble pin (9) and a connecting section (10);
the locking block body (6), the rubber cylinder (7) and the main body (8) are sequentially sleeved on the outer wall of the connecting section (10);
the locking block body (6) is connected with the connecting section (10);
the section of the rubber cylinder (7) is trapezoid, and the inner wall of the rubber cylinder is provided with an arc-shaped groove which is abutted with the locking block body (6) and the main body (8);
the body (8) is connected to the connecting section (10) by means of a sealed dissolvable pin (9).
8. The cylinder setting, throwing-free downhole choke of claim 7, wherein the sealing structure further comprises a movable section (11), a shear pin (12), a gas-filling nozzle soluble pin (13), an outer barrel (14), a spring (15), and a center rod (16);
the connecting section (10), the movable section (11), the outer cylinder (14) and the spring (15) are sequentially sleeved on the central rod (16);
the main body (8), the connecting section (10) and the movable section (11) form a second cylinder;
one end of the movable section (11) is connected with the main body (8), and the other end of the movable section is connected with the outer cylinder (14) through a shear pin (12);
the outer cylinder (14) is connected with the central rod (16) through an inflating valve soluble pin (13).
9. The cylinder setting throwing-free downhole choke of claim 8, wherein the choke structure comprises a connecting sleeve (17), an air tap (18), an air tap seat (19) and a sand control cover (20);
one end of the connecting sleeve (17) is connected with the central rod (16), and the other end of the connecting sleeve is provided with a convex groove;
the air tap (18) and the air tap seat (19) are sequentially placed in the convex groove of the connecting sleeve (17), and the air tap seat (19) is connected with the connecting sleeve (17);
the sand prevention cover (20) is connected with the connecting sleeve (17).
10. The cylinder setting throwing-free downhole choke of claim 9, wherein the sand control cover (20) is threaded on one end inner wall, radial slots are formed in the middle area, and the other end is spherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111617101.XA CN116357273A (en) | 2021-12-27 | 2021-12-27 | Underground throttle device with cylinder setting free from throwing and fishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111617101.XA CN116357273A (en) | 2021-12-27 | 2021-12-27 | Underground throttle device with cylinder setting free from throwing and fishing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116357273A true CN116357273A (en) | 2023-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111617101.XA Pending CN116357273A (en) | 2021-12-27 | 2021-12-27 | Underground throttle device with cylinder setting free from throwing and fishing |
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| Country | Link |
|---|---|
| CN (1) | CN116357273A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117365343A (en) * | 2023-11-03 | 2024-01-09 | 西安石油大学 | Setting anchor device and downhole choke having the same |
| CN117468898A (en) * | 2023-12-28 | 2024-01-30 | 西派集团有限公司 | Equal-percentage flow plunger type wellhead throttling device |
-
2021
- 2021-12-27 CN CN202111617101.XA patent/CN116357273A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN117468898A (en) * | 2023-12-28 | 2024-01-30 | 西派集团有限公司 | Equal-percentage flow plunger type wellhead throttling device |
| CN117468898B (en) * | 2023-12-28 | 2024-03-05 | 西派集团有限公司 | Equal-percentage flow plunger type wellhead throttling device |
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