CN202338299U - Downhole throttler with sand prevention filter element structure - Google Patents
Downhole throttler with sand prevention filter element structure Download PDFInfo
- Publication number
- CN202338299U CN202338299U CN2011204055236U CN201120405523U CN202338299U CN 202338299 U CN202338299 U CN 202338299U CN 2011204055236 U CN2011204055236 U CN 2011204055236U CN 201120405523 U CN201120405523 U CN 201120405523U CN 202338299 U CN202338299 U CN 202338299U
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- sand
- main body
- throttler
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- urceolus
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Abstract
The utility model discloses a downhole throttler with a sand prevention filter element structure, and specially aims to solve the problem of sand burying of the conventional throttler during natural gas production. The throttler is provided with a special sand prevention filter element assembly with three sand prevention filter layers, so that the sand prevention performance is relatively high; and therefore, the sand content in natural gas discharged from a well is low, a phenomenon of sand burying of the throttler can be reduced, and conditions are created for successfully taking the throttler out. Furthermore, a plurality of filter holes are formed in the sand prevention filter element, so that an effective filter hole area rate is relatively large, and a plurality of channels are supplied, so that the natural gas can be successfully discharged; and even if the sand outlet amount of a gas well is large, the throttler is blocked by sand difficultly.
Description
Technical field
The utility model relates to a kind of sand control filter cartridge construction underground throttle device, belongs to the gas field field of engineering technology.
Background technology
The Su Lige gas field is typically low hole, hypotonic compactness gas reservoir, and for improving well yield, gas well is generally taked the measure of waterpower SAND FRACTURING TECHNOLOGY before going into operation, if discharge opeing thoroughly can not make residual a large amount of fracturing sands of crack and pit shaft and fracturing fluid after the pressure break.In gas exploitation course, this fracturing sand, fracturing fluid or formation sand production can make that the valve of conventional throttle device is blocked, and influence the gas well ordinary production.Shake out for a long time, the phenomenon that restriction choke sand buries often occurs, cause difficulty maybe can't salvage for the salvaging of restriction choke.
Summary of the invention
The purpose of the utility model is to provide a kind of novel sand control filter cartridge construction underground throttle device, and the sand control filter core that it has sandwich construction has the comprehensive function of good throttling, step-down and sand control.
The concrete technology contents of the utility model is following:
Throw in head and connect main body through pin.Slips is hung and is hung in the rectangular through slot of fishing neck, and the two is connected on the main body through snap ring, and the slips inner ring surface is attached on the conical surface of main body.Upper and lower packing element is enclosed within the below of main body conical surface convex shoulder successively, and the inner conical surface of last packing element lower end is taken on the male cone (strobilus masculinus) that is attached to the lower rubber cylinder upper end.The upper end of the movable sleeve lower rubber cylinder that is threaded, the lower end is fastened in the endoporus of urceolus through self convex shoulder, and the male cone (strobilus masculinus) of urceolus upper end is aimed at the endoporus of lower rubber cylinder.The big nut internal thread connects regulates screwed pipe, and the external screw thread of upper end connects urceolus, and the external screw thread of lower end connects the sand control filter core assembly.The upper end of spring is resisted against on the convex shoulder of regulating screwed pipe, and lower end abutment is on the inner face of inner core lower end, and inner core connects main body through internal thread.Valve is located in the interior hole slot of central tube lower end, and therewith is enclosed within the endoporus of main body.
The slot urceolus of sand control filter core assembly connects big nut through internal thread.Between upper end cover and big nut, be provided with sealing ring.Between upper end cover and bottom end cover, ecto-entad is provided with outer circular hole pipe, outer screen drum, interior screen drum and interior circular hole pipe successively, and the inner hole sleeve of interior circular hole pipe is on the lower end tubing string that connects screwed pipe.
With reference to the accompanying drawings 1 and 2 the explanation the utility model operating principle:
1, launch process
The utility model sand control filter cartridge construction underground throttle device is thrown in through steel wire operation; Transfer in the process; Through throwing in 17 a promotion central tube 14, compression is positioned at the spring 5 of regulating screwed pipe 4 convex shoulders below, is in retracted state with packing element on guaranteeing in the process of going into the well 11 and lower rubber cylinder 10.Transfer in the process at restriction choke, slips 12 outer ring surfaces are close to tube inner wall, and being hampered a little then moves upward, slips 12 withdrawals, and the assurance restriction choke can be transferred smoothly.After restriction choke arrives assigned address, on carry and throw in 17, drive upwards operation of main body 9, the conical surface of main body 9 will strut slips 12 this moment, the restriction choke fastening is on oil pipe.When restriction choke is confirmed fastening at the oil pipe design attitude, will pin through bumper jar and 16 to cut off, carry steel wire on directly and will throw in 17 and propose pit shafts, input work completion.
2, seal process
After pin was cut off, slips 12 fastenings this moment were on tubing wall, and main body 9 keeps motionless, and it is motionless that the inner core 7 that is threaded with main body 9 also will keep.Spring promotion this moment is regulated screwed pipe 4 and is moved upward, and drive connects big nut 2, urceolus 3 moves upward together.Urceolus 3 upper end outer cone face cones advance in lower rubber cylinder 10 endoporus, and lower rubber cylinder 10 is strutted, and realize the first sealing of restriction choke.When opening well and making production, under differential pressure action, lower rubber cylinder 10 moves up, and will go up packing element 11 again and strut, and accomplishes secondary seal, promptly accomplishes the seal process of whole restriction choke.
3, natural gas filters out well
After restriction choke sealing, the going out the well natural gas and can only pass through sand control filter core assembly 1 of entrained sand particle, natural gas at first passes through slot urceolus 18, and at this moment the part sand grains is got off by detention.After getting into slot urceolus 18, inner chamber enlarges, and also can make some sand grains expand the intracavity bottom that sinks to slot urceolus 18.Natural gas continues to flow through outer circular hole pipe 21, outer screen drum 22, interior screen drum 23 and interior circular hole pipe 24 and gets into and regulate screwed pipes 4 then, 23 of the outer screen drum 22 and the interior screen drums of filtration again detention the part sand grains.The less natural gas via valve 6 of last sand content flows out gas well with central tube 14.
The advantage of the utility model is: restriction choke has the sand control filter core assembly of a special use, in this assembly structure, has three roads to prevent sand filter blanket, therefore; Sand control capability is better; The natural gas sand content that goes out behind the well is few, has reduced the phenomenon that restriction choke sand buries, and this has created condition for smooth salvaging of restriction choke.In addition, the sand control filter core has many filter openings, and effectively the filter opening area occupation ratio is bigger, and this just provides many passages for natural gas goes out well smoothly, even at the gas well sand production rate for a long time, restriction choke also is difficult for by the sand plug plug.
Description of drawings
Fig. 1 is a sand control filter cartridge construction underground throttle device structural representation.
Fig. 2 is the structural representation of the filter core assembly in the sand control filter cartridge construction underground throttle device.
The specific embodiment
Embodiment:
The embodiment that sees figures.1.and.2 to the utility model further specifies.
To throw in 17 with pin 16 is connected with main body 9.Three slips, 12 extensions are hung in three rectangular through slot of fishing neck 15, the two are connected on the main body 9, slips 12 inner ring surfaces are attached on the conical surface of main body 9 with snap ring 13.Upper and lower packing element is enclosed within the below of main body 9 conical surface convex shoulders successively, the inner conical surface of packing element 11 lower ends is taken on the male cone (strobilus masculinus) that is attached to lower rubber cylinder 10 upper ends.With the upper end of movable sleeve 8 lower rubber cylinder 10 that is threaded, the lower end is fastened in the endoporus of urceolus 3 through self convex shoulder, the male cone (strobilus masculinus) of urceolus 3 upper ends is aimed at the endoporus of lower rubber cylinder 10.Big nut 2 is connected urceolus 3 through upper external screw thread, and the lower end external screw thread connects sand control filter core assembly 1, and internal thread connects regulates screwed pipe 4.Spring 5 is contained in adjusting screwed pipe 4 convex shoulders below, and its lower end abutment is on the inner face of inner core 7 lower ends, and inner core 7 connects main body 9 through internal thread.Valve 6 direct rivetings are fixed in the interior hole slot of central tube 14 lower ends, and be enclosed within the endoporus of main body 9 with central tube 14.
Claims (1)
1. sand control filter cartridge construction underground throttle device is characterized in that:
Throw in head (17) and connect main body (9) through pin (16); Slips (12) is hung and is hung in the rectangular through slot of fishing neck (15), and the two is connected on the main body (9) through snap ring (13), and slips (12) inner ring surface is attached on the conical surface of main body (9); Last packing element (11) and lower rubber cylinder (10) are enclosed within the below of main body (9) conical surface convex shoulder successively, and the inner conical surface of last packing element (11) lower end is taken on the male cone (strobilus masculinus) that is attached to lower rubber cylinder (10) upper end; (8) of movable sleeve upper end lower rubber cylinder (10) that is threaded, the lower end is fastened in the endoporus of urceolus (3) through self convex shoulder, and the male cone (strobilus masculinus) of urceolus (3) upper end is aimed at the endoporus of lower rubber cylinder (10); Big nut (2) internal thread connects regulates screwed pipe (4), and the external screw thread of upper end connects urceolus (3), and the external screw thread of lower end connects sand control filter core assembly (1); The upper end of spring (5) is resisted against on the convex shoulder of regulating screwed pipe (4), and lower end abutment is on the inner face of inner core (7) lower end, and inner core (7) connects main body (9) through internal thread; Valve (6) is located in the interior hole slot of central tube (14) lower end, and therewith is enclosed within the endoporus of main body (9);
The slot urceolus (18) of sand control filter core assembly (1) connects big nut (2) through internal thread; Between upper end cover (20) and big nut (2), be provided with sealing ring (19); Between upper end cover (20) and bottom end cover (25), ecto-entad is provided with outer circular hole pipe (21), outer screen drum (22), interior screen drum (23) and interior circular hole pipe (24) successively, and the inner hole sleeve of interior circular hole pipe (24) is on the lower end tubing string that connects screwed pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204055236U CN202338299U (en) | 2011-10-21 | 2011-10-21 | Downhole throttler with sand prevention filter element structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204055236U CN202338299U (en) | 2011-10-21 | 2011-10-21 | Downhole throttler with sand prevention filter element structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202338299U true CN202338299U (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204055236U Expired - Fee Related CN202338299U (en) | 2011-10-21 | 2011-10-21 | Downhole throttler with sand prevention filter element structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202338299U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373092A (en) * | 2013-08-15 | 2015-02-25 | 中国石油天然气股份有限公司 | Underground blockage preventing flow restrictor and fishing method |
| CN109306856A (en) * | 2017-07-26 | 2019-02-05 | 中国石油天然气股份有限公司 | A kind of multistage takes liquid device and method |
| CN114075951A (en) * | 2020-08-21 | 2022-02-22 | 中国石油化工股份有限公司 | Natural gas hydrate exploitation shaft, system and method |
-
2011
- 2011-10-21 CN CN2011204055236U patent/CN202338299U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373092A (en) * | 2013-08-15 | 2015-02-25 | 中国石油天然气股份有限公司 | Underground blockage preventing flow restrictor and fishing method |
| CN109306856A (en) * | 2017-07-26 | 2019-02-05 | 中国石油天然气股份有限公司 | A kind of multistage takes liquid device and method |
| CN114075951A (en) * | 2020-08-21 | 2022-02-22 | 中国石油化工股份有限公司 | Natural gas hydrate exploitation shaft, system and method |
| CN114075951B (en) * | 2020-08-21 | 2024-05-24 | 中国石油化工股份有限公司 | Natural gas hydrate exploitation shaft, system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120718 Termination date: 20201021 |