CN104847295A - Mandrel-type hanger capable of replacing failure metal sealing part after well cementation - Google Patents

Mandrel-type hanger capable of replacing failure metal sealing part after well cementation Download PDF

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Publication number
CN104847295A
CN104847295A CN201510167051.8A CN201510167051A CN104847295A CN 104847295 A CN104847295 A CN 104847295A CN 201510167051 A CN201510167051 A CN 201510167051A CN 104847295 A CN104847295 A CN 104847295A
Authority
CN
China
Prior art keywords
ring
metal
hanger
metal sealing
arranges
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.)
Pending
Application number
CN201510167051.8A
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Chinese (zh)
Inventor
梁政
张川
何虹钢
叶哲伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southwest Petroleum University
Original Assignee
Southwest Petroleum University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Southwest Petroleum University filed Critical Southwest Petroleum University
Priority to CN201510167051.8A priority Critical patent/CN104847295A/en
Publication of CN104847295A publication Critical patent/CN104847295A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/02Surface sealing or packing
    • E21B33/03Well heads; Setting-up thereof
    • E21B33/04Casing heads; Suspending casings or tubings in well heads

Abstract

The invention discloses a mandrel-type hanger capable of replacing a failure metal sealing part after well cementation. The mandrel-type hanger comprises a hanger body. A pressing sleeve, a metal sealing ring and a metal sealing seat ring are sequentially arranged on a middle step of the hanger body from top to bottom. O-shaped sealing rings are arranged inside and outside the metal sealing seat ring, the threaded pressing sleeve is in threaded connection with the hanger body and presses the metal sealing ring, and a sealing ring is arranged at the middle part of the hanger body. After the hanger performs setting and well cementation, the sealing reliability is detected through a pressure test hole in a casing head body, and the metal sealing part can be replaced by using a removal tool in case of sealing failure.

Description

A kind of cement the well after the mandrel type hanger of replaceable inefficacy metal seal
Technical field
After the present invention relates to a kind of well cementation, the mandrel type hanger of replaceable inefficacy metal seal, belongs to oil drilling and extracting equipment technical field.
Background technology
The wellhead assembly of complete set sets three parts composition primarily of casing head, tubing head and oil recovery (gas).During drilling well, preventer is arranged on casing head and forms wellhead for drilling; During completion, oil recovery (gas) tree is arranged on above tubing head, namely forms oil recovery (gas) wellhead assembly.Wherein, the Main Function of tubing head hangs oil pipe, the annular space between sealing oil pipe and sleeve pipe; The Main Function that oil recovery (gas) is set is switch, control and guidance gas stream and suspension oil pipe; The effect of casing head is splicing sleeve, the annular space between Sealed casing pipe and sleeve pipe, and in casing head, the effect of hanger is to hang multilayer sleeve.Whole device need meet the formation testing completion jobs that requires special skills such as drilling well, well cementation and testing pressure down hole, well-flushing, fracture acidizing.
Along with the development of petroleum industry, drilling condition environment is now more and more severe, uses hanger rubber seal when low temperature environment of slips structure to be easy to lose efficacy.At present, what mandrel type casing hanger primary seal that oil gas field extensively adopts adopted is that rubber adds metal sealing mode, but rubber adds metal sealing must be arranged on hanger and enter well together.Mainly there is following problem in this structure: 1. rubber and metal o-ring are when latus rectum main by blowout preventer set easily by extension wound, damage, cause seal failure; 2. the seat of hanger in casing head is hung, is sealed site anteseptic difficulty, and the landwaste etc. that may there is deposition causes rubber seal, metal sealing lost efficacy; 3., after existing mandrel type hanger well cementation, if occur, primary seal lost efficacy, and cannot change rubber seal and metal o-ring.
So the mandrel type hanger of replaceable inefficacy metal sealing, seems particularly important after research well cementation.
Summary of the invention
Object of the present invention: in order to overcome the deficiencies in the prior art, the mandrel type hanger of replaceable inefficacy metal seal after the invention provides a kind of well cementation.
For achieving the above object, the technical scheme that the present invention takes is: a kind of cement the well after the mandrel type hanger of replaceable inefficacy metal seal, comprise hanger body, clamping sleeve, metal o-ring, metal sealing seat ring, it is characterized in that:
Hanger body is cylindrical shape, hanger body lower end arranges external screw thread and connected pipes or sleeve pipe, in the middle of outside hanger body, cylindrical step is set, cylindrical step lower end arranges taper seat, described taper seat is arranged the annular groove that at least one cross section is rectangle, described annular groove installs sealing ring, and metal sealing seat ring is installed in hanger intermediate cylindrical step upper end, and metal o-ring is installed in metal sealing seat ring upper end;
Hanger body arranges external screw thread more than metal o-ring installation site, and clamping sleeve is arranged on metal o-ring upper end and is threaded with hanger body;
Metal sealing seat ring inside cylindrical face arranges the annular groove that at least one cross section is rectangle, installs sealing ring in described annular groove; Outside metal sealing seat ring, the face of cylinder arranges the annular groove that at least one cross section is rectangle, installs sealing ring in described annular groove;
Metal sealing seat ring upper surface arranges at least 2 screwed holes, and described screwed hole is evenly arranged along metal sealing seat ring circumferencial direction; Metal o-ring upper surface arranges at least 2 screwed holes, and described screwed hole is evenly arranged along metal o-ring circumferencial direction.
Clamping sleeve is cylindrical shape, and clamping sleeve adopts with hanger body and is threaded, and metal o-ring is installed in clamping sleeve lower end, and clamping sleeve upper end arranges at least 2 draw-in grooves.
The beneficial effect that the present invention has is: adopt mandrel type hanger, metal seal is arranged on the upper end of mandrel hanger body, after mandrel hanger sets well cementation, effectively can detect metal seal and whether seal effectively, in case of seal failure can carry out the new metal seal of dismounting and change; Multiple sealing ring pressure-bearing is designed higher, safer in the middle part of mandrel hanger body; Outside mandrel hanger body, taper seat arranges sealing ring, be not easily scraped off removing sealing ring in process.
Accompanying drawing explanation
Fig. 1 is the structural representation under hanger duty of the present invention.
Fig. 2 is the structural representation that hanger of the present invention is seated in casing head.
Fig. 3 is the structural representation of hanger assembling process of the present invention.
Fig. 4 is the structural representation of hanger of the present invention dismounting metal seal.
In figure, 1. hanger body, 2. clamping sleeve, 3. metal o-ring, 4. metal sealing seat ring, 5.O RunddichtringO, 6. spring skeleton formula S RunddichtringO, 7. rectangular seal, 8. running tool, 9. casing head body, 10. augmentor, 11. jackscrews, 12. pressure testing holes, 13. take out instrument.
Detailed description of the invention
As shown in Figure 1, hanger body 1 is cylindrical shape, hanger body 1 lower end arranges external screw thread and connected pipes or sleeve pipe, outside hanger body 1, stage casing arranges cylindrical step, cylindrical step lower end arranges taper seat, it is the annular groove of rectangle that described cylindrical step external cylindrical surface centre position arranges a cross section, for the skeleton S RunddichtringO 6 of mounting spring; Described taper seat being arranged a cross section is that the annular groove of rectangle is for installing rectangular seal 7.It is the annular groove of rectangle that metal sealing seat ring 4 inside cylindrical face arranges a cross section, mounting O-shaped sealing ring 5 in described annular groove; Outside metal sealing seat ring 4, the face of cylinder arranges a cross section is the annular groove of rectangle, mounting O-shaped sealing ring 5 in described annular groove.Metal sealing seat ring 4 is arranged on hanger body 1 outer cylindrical step upper end, and metal o-ring 3 is installed in metal sealing seat ring 4 upper end.
As shown in Figure 2, after the skeleton S RunddichtringO 6 of hanger body 1 mounting spring and rectangular seal 7, lower end splicing sleeve, upper end is threaded connection running tool 8, and running tool 8 upper end connects landing joint and hanger body 1 is sent in casing head body 9 cavity.
As shown in Figure 3, hanger body 1 is sent in casing head body 9 cavity, running tool 8 of dismantling after having cemented the well.Metal sealing seat ring 4 is loaded hanger body 1 step surface upper end, continue to load metal o-ring 3, clamping sleeve 2 is installed to metal o-ring 3 upper end by the screw thread of hanger body 1 upper end.Clamping sleeve 2 is cylindrical shape, and clamping sleeve 2 and hanger are threaded connection, and clamping sleeve 2 upper end arranges 4 draw-in grooves and is evenly arranged along clamping sleeve 2 circumferencial direction.Augmentor 10 coordinates with the draw-in groove of clamping sleeve 2 upper end, rotates augmentor 10 and drive clamping sleeve 2 to rotate by artificial boosting-rod, and clamping sleeve 2 compresses metal o-ring 3 makes metal o-ring 3 crimp produce sealing effectiveness.Jackscrew 11 is tightened, prevents clamping sleeve 2 axial motion, by the pressure testing hole 12 of casing head body 9, the sealing reliability of metal o-ring 3 is verified.
As shown in Figure 4, as seal verification is defective, need to take out metal sealing assembly.Metal sealing seat ring 4 upper surface arranges 4 screwed holes and is evenly arranged along metal sealing seat ring 4 circumferencial direction; Metal o-ring 3 upper surface arranges 4 screwed holes and is evenly arranged along metal o-ring 3 circumferencial direction.Taking-up instrument 13 is connected with the screwed hole of metal o-ring 3 and metal sealing seat ring 4, upwards lifting taking-up metal sealing assembly, then reinstalling new metal sealing assembly, completing more changing jobs of metal sealing assembly by taking out instrument 13.

Claims (2)

1. a mandrel type hanger for the rear replaceable inefficacy metal seal of well cementation, comprises hanger body (1), clamping sleeve (2), metal o-ring (3), metal sealing seat ring (4), it is characterized in that:
Hanger body (1) is cylindrical shape, hanger body (1) lower end arranges external screw thread and connected pipes or sleeve pipe, hanger body (1) arranges cylindrical step in the middle of outside, cylindrical step lower end arranges taper seat, described taper seat is arranged the annular groove that at least one cross section is rectangle, described annular groove installs sealing ring, metal sealing seat ring (4) is installed in hanger intermediate cylindrical step upper end, and metal o-ring (3) is installed in metal sealing seat ring (4) upper end;
Hanger body (1) arranges external screw thread more than metal o-ring (3) installation site, and clamping sleeve (2) is arranged on metal o-ring (3) upper end and is threaded with hanger body (1);
Metal sealing seat ring (4) inside cylindrical face arranges the annular groove that at least one cross section is rectangle, installs sealing ring in described annular groove; The face of cylinder, metal sealing seat ring (4) outside arranges the annular groove that at least one cross section is rectangle, installs sealing ring in described annular groove;
Metal sealing seat ring (4) upper surface arranges at least 2 screwed holes, and described screwed hole is evenly arranged along metal sealing seat ring (4) circumferencial direction; Metal o-ring (3) upper surface arranges at least 2 screwed holes, and described screwed hole is evenly arranged along metal o-ring (3) circumferencial direction.
2. according to claim 1 a kind of cement the well after the mandrel type hanger of replaceable inefficacy metal seal, comprise clamping sleeve (2), it is characterized in that: clamping sleeve (2) is cylindrical shape, clamping sleeve (2) adopts with hanger body (1) and is threaded, metal o-ring (3) is installed in clamping sleeve (2) lower end, and clamping sleeve (2) upper end arranges at least 2 draw-in grooves.
CN201510167051.8A 2015-04-10 2015-04-10 Mandrel-type hanger capable of replacing failure metal sealing part after well cementation Pending CN104847295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510167051.8A CN104847295A (en) 2015-04-10 2015-04-10 Mandrel-type hanger capable of replacing failure metal sealing part after well cementation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510167051.8A CN104847295A (en) 2015-04-10 2015-04-10 Mandrel-type hanger capable of replacing failure metal sealing part after well cementation

Publications (1)

Publication Number Publication Date
CN104847295A true CN104847295A (en) 2015-08-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510167051.8A Pending CN104847295A (en) 2015-04-10 2015-04-10 Mandrel-type hanger capable of replacing failure metal sealing part after well cementation

Country Status (1)

Country Link
CN (1) CN104847295A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106014323A (en) * 2016-07-21 2016-10-12 宝鸡石油机械有限责任公司广汉钻采设备厂 Hanger with metal auxiliary seal and tubing equipment with hanger

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5456320A (en) * 1993-12-06 1995-10-10 Total Tool, Inc. Casing seal and spool for use in fracturing wells
US20100007097A1 (en) * 2008-07-08 2010-01-14 Worldwide Oilfield Machine, Inc. Resilient High Pressure Metal-to-Metal Seal and Method
CN201554402U (en) * 2009-11-16 2010-08-18 江苏金石油气井口科技有限公司 Mandrel type hanger
CN201730574U (en) * 2010-06-18 2011-02-02 宝鸡石油机械有限责任公司 Wellhead device oil pipe hanging metal sealing device
CN202596624U (en) * 2011-12-30 2012-12-12 中国石油天然气股份有限公司 Casing suspender with metallic sealing and metallic framework type rubber sealing
CN103423529A (en) * 2012-07-11 2013-12-04 美钻能源科技(上海)有限公司 Hydraulic type submarine pipeline connector
CN204060602U (en) * 2014-07-01 2014-12-31 中国石油集团渤海石油装备制造有限公司 A kind of bimetallic (spring cone) seal formula casing head

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5456320A (en) * 1993-12-06 1995-10-10 Total Tool, Inc. Casing seal and spool for use in fracturing wells
US20100007097A1 (en) * 2008-07-08 2010-01-14 Worldwide Oilfield Machine, Inc. Resilient High Pressure Metal-to-Metal Seal and Method
CN201554402U (en) * 2009-11-16 2010-08-18 江苏金石油气井口科技有限公司 Mandrel type hanger
CN201730574U (en) * 2010-06-18 2011-02-02 宝鸡石油机械有限责任公司 Wellhead device oil pipe hanging metal sealing device
CN202596624U (en) * 2011-12-30 2012-12-12 中国石油天然气股份有限公司 Casing suspender with metallic sealing and metallic framework type rubber sealing
CN103423529A (en) * 2012-07-11 2013-12-04 美钻能源科技(上海)有限公司 Hydraulic type submarine pipeline connector
CN204060602U (en) * 2014-07-01 2014-12-31 中国石油集团渤海石油装备制造有限公司 A kind of bimetallic (spring cone) seal formula casing head

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106014323A (en) * 2016-07-21 2016-10-12 宝鸡石油机械有限责任公司广汉钻采设备厂 Hanger with metal auxiliary seal and tubing equipment with hanger
CN106014323B (en) * 2016-07-21 2018-11-30 宝鸡石油机械有限责任公司广汉钻采设备厂 Lower oil tube equipment equipped with hanger

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Application publication date: 20150819

RJ01 Rejection of invention patent application after publication