CN103867167A - Downhole fixed bypass restrictor - Google Patents

Downhole fixed bypass restrictor Download PDF

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Publication number
CN103867167A
CN103867167A CN201210528306.5A CN201210528306A CN103867167A CN 103867167 A CN103867167 A CN 103867167A CN 201210528306 A CN201210528306 A CN 201210528306A CN 103867167 A CN103867167 A CN 103867167A
Authority
CN
China
Prior art keywords
outer tube
sliding sleeve
oil nozzle
downhole
restrictor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201210528306.5A
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Chinese (zh)
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CN103867167B (en
Inventor
王世平
李顺清
张�杰
潘云兵
杜涓
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China Petroleum and Natural Gas Co Ltd
Original Assignee
China Petroleum and Natural Gas Co Ltd
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Publication date
Application filed by China Petroleum and Natural Gas Co Ltd filed Critical China Petroleum and Natural Gas Co Ltd
Priority to CN201210528306.5A priority Critical patent/CN103867167B/en
Publication of CN103867167A publication Critical patent/CN103867167A/en
Application granted granted Critical
Publication of CN103867167B publication Critical patent/CN103867167B/en
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Anticipated expiration legal-status Critical

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Abstract

The invention discloses a downhole fixed bypass restrictor which is designed to solve the problems of long shut-in balance pressure time, low efficiency, large gas well yield loss, high construction cost and the like. Gas through holes are formed in an outer tube and a central balance sliding sleeve of the restrictor, the upper portion of a shoulder on the outer wall of the outer tube is connected with a slip, a sealing gasket and a lower sealing cylinder sleeve the lower portion of the shoulder, the top end of the outer tube internally sleeves a propulsion sleeve and a fishing joint, the central balance sliding sleeve and a return spring are arranged in the outer tube, an oil nozzle fixing seat with an oil nozzle is connected into a bottom hole of the lower sealing cylinder, the lower portion of the oil nozzle fixing seat is connected with a sand prevention cylinder provided with an outer wall slit, an oil nozzle spring is arranged in the sand prevention cylinder, and a snap bar penetrates the central balance sliding sleeve through a central hole of the fishing joint. The downhole fixed bypass restrictor can avoid downhole safety accidents in maintenance and construction, the gas well yield loss is decreased, the labor intensity of workers is relieved, maintenance cost is reduced, and efficient and safe maintenance of the downhole restrictor is ensured.

Description

Down-hole fixed bypass throttle device
Technical field
The present invention relates to a kind of down-hole fixed bypass throttle device, belong to Oil/gas Well development technique field.
Background technology
Down-hole fixed restriction choke is widely used in the Development and Production of Oil/gas Well, and it can be realized the pressure of cancelling individual well surface water blind roaster, reduce well head and surface line, the labour intensity that reduces well hilllock administrative staff, reduction production run cost and improve well automatic management level.But, the preparation more complicated of the restriction choke using at present before maintenance, labor strength is large, the closing well equilibrium pressure time is long, inefficiency, and gas well production loss is large, construction operation cost is high, on restriction choke, pressure balance cannot accurately judge, job safety has a big risk, and is prone to security incident.
Summary of the invention
The object of the present invention is to provide a kind of down-hole fixed bypass throttle device, it can overcome the Problems Existing of above-mentioned restriction choke, ensures that the maintenance work of underground throttle device is carried out efficiently and safely.
Concrete technical scheme of the present invention is as follows:
The outer tube body of this restriction choke is provided with outer tube air passing hole radially, and pipe outer wall is provided with shop bolt, convex shoulder top, pipe outer wall middle part connection opening ring, slips spring and slips, convex shoulder below suit sealing mat and lower seal cylinder; Outer tube top outer wall is sleeved on and advances in cover and fishing joint; In outer tube, be provided with center balance sliding sleeve, sliding sleeve barrel is provided with the sliding sleeve air passing hole corresponding with outer tube air passing hole, and sliding sleeve below is provided with back-moving spring; In connecting in lower seal cylinder bottom outlet, establish the oil nozzle holder of oil nozzle, oil nozzle holder bottom is established oil nozzle spring in connecting and is provided with the sand control cylinder of barrel slot; Break rod in fishing joint centre bore penetrates center balance sliding sleeve.
This down-hole fixed bypass throttle device can be avoided safeguarding in construction downhole safety accident occurs, and reduces gas well production loss, alleviates workman's labour intensity, reduces maintenance cost, ensures that the maintenance work of underground throttle device is carried out efficiently and safely.
Brief description of the drawings
Fig. 1 is down-hole fixed bypass throttle device schematic diagram.
Detailed description of the invention
With reference to Fig. 1, embodiments of the invention are further illustrated:
Embodiment:
This restriction choke is by breaking rod 1, fishing joint 2, advancing cover 3, shop bolt 4, split ring 5, slips spring 6, slips 7, outer tube 8, center balance sliding sleeve 9, sealing mat 10, lower seal cylinder 13, back-moving spring 14, oil nozzle holder 15, oil nozzle 16, sand control cylinder 17 and oil nozzle spring 18 to form:
Outer tube 8 bodys are provided with four outer tube air passing holes 11 radially, and pipe outer wall is provided with shop bolt 4, convex shoulder top, pipe outer wall middle part connection opening ring 5, slips spring 6 and slips 7, convex shoulder below suit sealing mat 10 and lower seal cylinder 13; Outer tube 8 top outer walls are sleeved on and advance in cover 3 and fishing joint 2; In outer tube 8, be provided with center balance sliding sleeve 9, sliding sleeve barrel is provided with four sliding sleeve air passing holes 12 corresponding with outer tube air passing hole 11, and sliding sleeve below is provided with back-moving spring 14; In connecting in lower seal cylinder 13 bottom outlets, establish the oil nozzle holder 15 of oil nozzle 16, in oil nozzle holder 15 lower thread connect, establish oil nozzle spring 18 and be provided with the sand control cylinder 17 of six road barrel slots; Break rod 1 in fishing joint 2 centre bores penetrate center balance sliding sleeve 9.
The course of work of the present invention is as follows:
This restriction choke is by breaking under excellent 1 lower going-into-well in seating nipple, slips 7 by split ring 5 and 6 engagings of slips spring in seating nipple, sealing mat 10 seals the annular space of restriction choke and seating nipple, makes down-hole natural gas enter restriction choke top by the barrel slot of sand control cylinder 17 and oil nozzle 16.After work certain hour, in the time needing to be serviced or adjust product, generally to pull restriction choke out.In the time that fishing tool drags for fishing joint 2, the center-pole of fisher withstands center balance sliding sleeve 9 and moves down, make sealing mat 10 exit sealing surface, now, four sliding sleeve air passing holes 12 are aimed at and are communicated with four outer tube air passing holes 11, make a large amount of natural gas via air passing holes enter restriction choke top, reach the object of Fast-Balance pressure.
Cannot pull out as restriction choke chance special circumstances time, can implement to give up.After giving up, center balance sliding sleeve 9 return under the effect of back-moving spring 14, seals air passing hole again, makes natural gas again enter restriction choke top by barrel slot and the oil nozzle 16 of sand control cylinder 17, reenters sealing and throttle.Shop bolt 4 can prevent from washing away because of air-flow the swing offset of the center balance sliding sleeve 9 causing, and avoids air passing hole dislocation, ensures the pressure balance of restriction choke.

Claims (1)

1. a down-hole fixed bypass throttle device, is characterized in that:
Outer tube (8) body of this restriction choke is provided with outer tube air passing hole (11) radially, pipe outer wall is provided with shop bolt (4), pipe outer wall middle part convex shoulder top connection opening ring (5), slips spring (6) and slips (7), convex shoulder below suit sealing mat (10) and lower seal cylinder (13); Outer tube (8) top outer wall is sleeved on and advances in cover (3) and fishing joint (2); In outer tube (8), be provided with center balance sliding sleeve (9), sliding sleeve barrel is provided with the sliding sleeve air passing hole (12) corresponding with outer tube air passing hole (11), and sliding sleeve below is provided with back-moving spring (14); In connecting in lower seal cylinder (13) bottom outlet, establish the oil nozzle holder (15) of oil nozzle (16), oil nozzle holder (15) bottom is established oil nozzle spring (18) in connecting and is provided with the sand control cylinder (17) of barrel slot; Breaking rod (1) penetrates in center balance sliding sleeve (9) through fishing joint (2) centre bore.
CN201210528306.5A 2012-12-10 2012-12-10 Down-hole fixed pattern bypass throttle device Active CN103867167B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210528306.5A CN103867167B (en) 2012-12-10 2012-12-10 Down-hole fixed pattern bypass throttle device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210528306.5A CN103867167B (en) 2012-12-10 2012-12-10 Down-hole fixed pattern bypass throttle device

Publications (2)

Publication Number Publication Date
CN103867167A true CN103867167A (en) 2014-06-18
CN103867167B CN103867167B (en) 2016-08-10

Family

ID=50906131

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210528306.5A Active CN103867167B (en) 2012-12-10 2012-12-10 Down-hole fixed pattern bypass throttle device

Country Status (1)

Country Link
CN (1) CN103867167B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2521392Y (en) * 2001-12-17 2002-11-20 中国石油天然气股份有限公司 Underwall multifunction controller for natural gas well
CN201144674Y (en) * 2007-07-25 2008-11-05 中国石油天然气股份有限公司 Novel downhole choke having sealing structure
WO2009023853A1 (en) * 2007-08-15 2009-02-19 Schlumberger Canada Limited Flapper gas lift valve
CN201439711U (en) * 2009-07-20 2010-04-21 中国石油天然气股份有限公司 Self-locking V-shaped underground sealing throttle
CN201810289U (en) * 2010-10-22 2011-04-27 中国石油天然气股份有限公司 Fixed downhole choke holder
CN203035169U (en) * 2012-12-10 2013-07-03 中国石油天然气股份有限公司 Downhole fixed-type bypass restrictor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2521392Y (en) * 2001-12-17 2002-11-20 中国石油天然气股份有限公司 Underwall multifunction controller for natural gas well
CN201144674Y (en) * 2007-07-25 2008-11-05 中国石油天然气股份有限公司 Novel downhole choke having sealing structure
WO2009023853A1 (en) * 2007-08-15 2009-02-19 Schlumberger Canada Limited Flapper gas lift valve
CN201439711U (en) * 2009-07-20 2010-04-21 中国石油天然气股份有限公司 Self-locking V-shaped underground sealing throttle
CN201810289U (en) * 2010-10-22 2011-04-27 中国石油天然气股份有限公司 Fixed downhole choke holder
CN203035169U (en) * 2012-12-10 2013-07-03 中国石油天然气股份有限公司 Downhole fixed-type bypass restrictor

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CN103867167B (en) 2016-08-10

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