CN102155181A - Wellhead tieback connector - Google Patents
Wellhead tieback connector Download PDFInfo
- Publication number
- CN102155181A CN102155181A CN2011100756405A CN201110075640A CN102155181A CN 102155181 A CN102155181 A CN 102155181A CN 2011100756405 A CN2011100756405 A CN 2011100756405A CN 201110075640 A CN201110075640 A CN 201110075640A CN 102155181 A CN102155181 A CN 102155181A
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- piston cylinder
- conical surface
- ring
- wellhead
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Abstract
The invention relates to a wellhead tieback connector. The wellhead tieback connector is characterized by comprising a cylindrical body, wherein a flange connected with a tension riser is arranged on the top of the body; a locking disk consisting of two semicircular rings is arranged in the middle of the body; a piston cylinder is circumferentially arranged on the body; two oil pipes which pass through the locking disk, an outer lug and the piston cylinder are inserted on the locking disk, the outer lug and the piston cylinder, one oil pipe is communicated with the upper side of an inner lug, and the other oil pipe is communicated with the lower side of the inner lug; a seal ring is arranged on the body under the inner lug; a plurality of through holes are formed on the locking disk and the outer lug correspondingly, and a locking disk bolt connected with the top of the piston cylinder is slidably arranged in each corresponding through hole; a cylindrical shell is circumferentially sleeved on the piston cylinder, and is connected to the outer lug of the body through threads; and the body is supported on the outer rim of the wellhead through supporting legs. The wellhead tieback connector has small outer diameter and long service life, and can be widely applied to connection between the top tension riser and an underwater wellhead in various marine petroleum exploitation processes.
Description
Technical field
The present invention relates to a kind of oil drilling device, particularly be used for the well head tieback connector that the top-tensioned standpipe is connected with underwater well head about a kind of.
Background technology
The drilling of general offshore oil needs standpipe to connect subsea production facility and water surface production platform.Existing standpipe type is varied, compares with the standpipe of other type, and the top-tensioned standpipe can provide the vertical channel between platform and the seabed, brings great convenience for drilling well and well workover, has significant advantage.But the top-tensioned standpipe is very high for the exercise performance requirement of floating platform, therefore, is only applicable to tension leg platform (TLP), SPAR platform (Spar Platform) and semisubmersible platform at present.And the equipment size that tension leg platform (TLP) and SPAR platform can pass through is limited, SPAR platform especially, and equipment size is no more than 32.5 inches under most of situation.At present, underwater well head connector both domestic and external has a variety of, but their size is bigger, can't transfer by the SPAR platform.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of platform operations size restrictions that is not subjected to, and can realize the well head tieback connector that tensioned riser and well head accurately, efficiently, reliably dock and lock.
For achieving the above object, the present invention takes following technical scheme: a kind of well head tieback connector, it is characterized in that: it comprises a tubular body, described bodies top be provided with one with the tensioned riser flange connecting, described body middle part is provided with a step-like outward flange, and described outward flange top is provided with a locking plate of being made up of two semicircular ring; Described body circumferentially is provided with a piston cylinder, the inward flange of the described piston cylinder described body that is tightly connected, on described locking plate, outward flange and piston cylinder, be inserted with two oil pipes that connect the three, wherein a described oil pipe is communicated with described inward flange top, and another described oil pipe is communicated with described inward flange below; The body of described inward flange below is provided with a joint ring; Correspondence is provided with some through holes on described locking plate, the outward flange, slides respectively in each corresponding described through hole that is provided with to be provided with the locking plate bolt at the described piston cylinder of connection top; Described piston cylinder middle part and bottom are respectively arranged with a circle and drive the conical surface, and described piston cylinder circumferentially is arranged with a cylindrical case, and described shell is by on the outward flange that is threaded in described body; Described body bottom is connected the supporting leg of a ring-type by the support ring of being made up of two semicircles with some bolts, described supporting leg is supported on outer wellhead along last, and is provided with a black box between described body bottom and the outer wellhead edge; The corresponding circle thrust conical surface that is provided with of the driving conical surface at described supporting leg and described piston cylinder middle part, described supporting leg bottom be provided with one described outer wellhead along and piston cylinder between c-shaped retaining ring, described retaining ring is provided with described piston cylinder bottom and drives the corresponding delineation position conical surface of the conical surface, and described outer casing underpart withstands described retaining ring and described outer wellhead edge is tightly connected.
The bottom of described shell is provided with the convenient horn mouth that inserts the well head outer.
The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is owing to designed a kind of tieback connector with slender type piston cylinder, on piston cylinder, be provided with simultaneously the driving frustum corresponding with being driven parts, therefore not only can reduce the external diameter of connector effectively, and make the driving operation very simple and convenient.2, the present invention is provided with orientational cone-shaped surface owing in the shell bottom horn mouth is set on retaining ring, therefore can make accurate positioning of the present invention, steadily reliable.3, the present invention is owing to be provided with the thrust conical surface on supporting leg, therefore can carry out spacingly to piston cylinder, effectively prevents the hydraulic driver overload, improved application life of the present invention.4, the present invention is owing to adopt hydraulic system to drive, and is provided with self-locking structure in hydraulic system, therefore shortened the locking between top-tensioned standpipe and the underwater well head and the operating time of release effectively, improved the reliability that connects under water.5, therefore the present invention when hydraulic system breaks down, can carry out the mechanical release operation owing to be provided with standby mechanical release device, has further improved the reliability that connects under water.Outside dimension of the present invention is little, and long service life is recyclablely utilized again, can save great amount of cost, and hydraulic-driven and stand-by machine release mechanism are arranged, and can be widely used in the various marine petroleum exploitation processes in being connected between the top-tensioned standpipe and underwater well head.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is a body construction schematic diagram of the present invention
Fig. 3 is the A-A sectional view of Fig. 2
Fig. 4 is a shell mechanism schematic diagram of the present invention
Fig. 5 is a piston cylinder structural representation of the present invention
Fig. 6 is a joint ring cross-sectional schematic of the present invention
Fig. 7 is a support ring structural representation of the present invention
Fig. 8 is a support leg structure schematic diagram of the present invention
Fig. 9 is a seal ring assembly structural representation of the present invention
Figure 10 is a retaining ring structural representation of the present invention
The specific embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1, the present invention mainly comprises body 1, the shell 2 of tubular, piston cylinder 3, joint ring 4, support ring 5, supporting leg 6, seal ring assembly 7, retaining ring 8 and locking plate 9.
As shown in Figure 1 and Figure 2, body of the present invention 1 top is provided with a flange 11, is provided with on the flange if a connecting hole 12 can be fixedlyed connected body 1 with connecting hole 12 by bolt with the top-tensioned standpipe.That body 1 middle part is provided with on one is big, small stair shape outward flange 13 down, is provided with external screw thread at the big end of outward flange 13, and small end is provided with the groove 14 that sealing ring is installed, and body 1 bottom is provided with a circle draw-in groove 15.As shown in Figure 3, the big end of outward flange 13 is provided with two oil pipe passages 16,17 and some through holes 18.
As Fig. 1, shown in Figure 4, shell of the present invention 2 tops connect body 1 by the internal thread 21 that its internal diameter is provided with, the bottom is provided with an inside circle boss 22, and the internal diameter of boss 22 is provided with a circle groove 23, is used to install shell 2 and outer wellhead along 10 sealing rings that are connected.The bottom of shell 2 is provided with the convenient horn mouth 24 that inserts well head outer 10.
As Fig. 1, shown in Figure 5, piston cylinder of the present invention 3 middle and upper parts are provided with an inward flange 31, the internal diameter of inward flange 31 is provided with a circle groove 32, is used to install the sealing ring that piston cylinder 3 is connected with body 1, and piston cylinder 3 middle parts and bottom are respectively arranged with a circle and drive the conical surface 33,34.Piston cylinder 3 tops be provided with two with the corresponding asphalt channel 35,36 of body 1 oil pipe passage 16,17, wherein asphalt channel 35 is communicated with the top of inward flange 31, make and form first hydraulic cavities 37 between the top of inward flange 31 and the body 1, oil pipe passage 36 is communicated with the below of inward flanges 31.Piston cylinder 3 tops also are provided with the corresponding bolt hole (not shown) of through hole 18 at some and body 1 outward flange 13 big end tops.
As Fig. 1, shown in Figure 6, be respectively arranged with sealed groove 41,42 on the internal diameter of joint ring 4 of the present invention and the external diameter, be used to install respectively the sealing ring that is connected with piston cylinder 2 with body 1.Formation second hydraulic cavities 38 between the below that the asphalt channel 36 that is communicated with inward flange 31 belows makes inward flange 31 and body 1 and the joint ring 4.
As Fig. 1, shown in Figure 7, support ring 5 of the present invention is made up of two semicircular ring 51, and two semicircular ring 51 snap in the draw-in groove 15 of body 1 bottom setting from body 1 both sides.
As Fig. 1, shown in Figure 8, be provided with three rank stepped holes 61,62,63 in the supporting leg 6 of the present invention, the first rank stepped hole 61 is used for sheathed support ring 5, the second rank stepped holes 62 and radially is provided with some screw hole 64, the three rank stepped holes 63 that are used to connect body 1 and is supported on outer wellhead along on 10.Supporting leg 6 middle parts circumferentially are provided with piston cylinder 3 middle parts and drive the corresponding circle thrust conical surface 65 of the conical surface 33.
As Fig. 1, shown in Figure 9, black box 7 of the present invention is a conventional assembly, and it is arranged on body 1 bottom and outer wellhead along between 10 tops.
Fig. 1, shown in Figure 10, retaining ring of the present invention 8 is c-shaped, and retaining ring 8 and outer wellhead be along 10 corresponding multi-turn groove 81 and the fins 82 of being provided with, and retaining ring 8 middle parts circumferentially are provided with piston cylinder 3 bottoms and drive the orientational cone-shaped surface 83 that the corresponding circle of the conical surface 34 protrudes.After piston cylinder 3 surpassed the orientational cone-shaped surface 83 that protrudes, the retaining ring 8 of C shape can inwardly be shunk under the pressure effect of piston cylinder 3, makes the present invention be in locking state; When the driving conical surface 34 of piston cylinder 3 moves up when contacting with the orientational cone-shaped surface 83 of retaining ring, can unclamp retaining ring 8, make apparatus of the present invention be in released state.
As shown in Figure 1, the lock collar 9 of separating of the present invention is made up of two semicircular ring, and the bottom of separating lock collar 9 is arranged on outward flange 3 tops of body 1, and is corresponding with outward flange 13 asphalt channels 16,17 of body 1, two asphalt channels 91,92 is set separating on the lock collar 9; Simultaneously corresponding with the through hole 18 and the bolt hole at piston cylinder 3 tops on the body 1, separate lock collar 9 and be provided with the through hole (not shown), in separating each through hole that lock collar 9, outward flange 13 be oppositely arranged, penetrate locking plate bolt 93, and locking plate bolt 93 is screwed in the bolt hole at piston cylinder 3 tops.Be inserted with the oil pipe 94,95 that is communicated with fueller in two asphalt channels 91,92 on locking plate 9 respectively, wherein an oil pipe 94 passes asphalt channel 91 and asphalt channel 17 connection asphalt channels 35, and its another oil pipe 95 passes asphalt channel 92 and asphalt channel 16 is communicated with asphalt channels 36.
When the present invention works, comprise following several situation:
When the present invention is in off working state, the present invention and outer wellhead are in released state (shown in right side among Fig. 1 is divided) along 10, this moment, retaining ring 8 was a normality, promptly flick state, piston cylinder 3 is in a high position, the release valve snail bolt 93 that is connected with piston cylinder 3 tops also is in a high position, the driving conical surface 34 of piston cylinder 3 bottoms contacts with the orientational cone-shaped surface 83 of retaining ring 8, and the thrust frustum 65 of the driving conical surface 33 at piston cylinder 3 middle parts and supporting leg 6 breaks away from, first hydraulic cavities 37 is in the oil return state, and second hydraulic cavities 38 is in the oil-feed state.
When the present invention was in running order, hydraulic system started, and first hydraulic cavities 37 is in the oil-feed state, and second hydraulic cavities 38 is in oil condition; Hydraulic oil moves down vertically by oil pipe 94 driven plunger tubes 3, the driving conical surface 33 at piston cylinder 3 middle parts contacts with the thrust frustum 65 of supporting leg 6, and the orientational cone-shaped surface 83 of the driving conical surface 34 of piston cylinder 3 bottoms and retaining ring 8 breaks away from, and inwardly push retaining ring 8 from the outer wall of retaining ring 8, make the present invention and outer wellhead be in locking state (shown in left part among Fig. 1) along 10; And have very big extruding force and stiction because the elasticity of retaining ring 8 causes between retaining ring 8 and the piston cylinder 3, add piston cylinder 3 self gravitation effects, therefore the locking state of this moment is reliable self-locking state.This moment, piston cylinder 3 was in low level, and the release valve snail bolt 93 that is connected with piston cylinder 3 tops also is in low level,
When the present invention need remove locking state, hydraulic system starts, first hydraulic cavities 37 is in the oil return state, second hydraulic cavities 38 is in the oil-feed state, hydraulic oil moves up vertically by oil pipe 95 driven plunger tubes 3, contact with the orientational cone-shaped surface 83 of retaining ring 8 up to the driving conical surface 34 of piston cylinder 3, retaining ring 8 since self elasticity flick, be returned to the normality position, remove the present invention and the outer wellhead locking state (shown in right side branch among Fig. 1) along 10.
When hydraulic system of the present invention breaks down, can start the standby mechanical release device of the present invention.During operation, utilize underwater robot upwards to prize and separate lock collar 9, drive piston cylinder 3 by release screw bolt 93 and move up, retaining ring 8 is automatically springed open, and then realize mechanical release operation of the present invention with instrument.
The various embodiments described above only are used to illustrate the present invention, and wherein the structure of each parts, connected mode etc. all can change to some extent, and every equivalents of carrying out on the basis of technical solution of the present invention and improvement all should not got rid of outside protection scope of the present invention.
Claims (2)
1. well head tieback connector, it is characterized in that: it comprises a tubular body, described bodies top be provided with one with the tensioned riser flange connecting, described body middle part is provided with a step-like outward flange, described outward flange top is provided with a locking plate of being made up of two semicircular ring; Described body circumferentially is provided with a piston cylinder, the inward flange of the described piston cylinder described body that is tightly connected, on described locking plate, outward flange and piston cylinder, be inserted with two oil pipes that connect the three, wherein a described oil pipe is communicated with described inward flange top, and another described oil pipe is communicated with described inward flange below; The body of described inward flange below is provided with a joint ring; Correspondence is provided with some through holes on described locking plate, the outward flange, slides respectively in each corresponding described through hole that is provided with to be provided with the locking plate bolt at the described piston cylinder of connection top; Described piston cylinder middle part and bottom are respectively arranged with a circle and drive the conical surface, and described piston cylinder circumferentially is arranged with a cylindrical case, and described shell is by on the outward flange that is threaded in described body; Described body bottom is connected the supporting leg of a ring-type by the support ring of being made up of two semicircles with some bolts, described supporting leg is supported on outer wellhead along last, and is provided with a black box between described body bottom and the outer wellhead edge; The corresponding circle thrust conical surface that is provided with of the driving conical surface at described supporting leg and described piston cylinder middle part, described supporting leg bottom be provided with one described outer wellhead along and piston cylinder between c-shaped retaining ring, described retaining ring is provided with described piston cylinder bottom and drives the corresponding delineation position conical surface of the conical surface, and described outer casing underpart withstands described retaining ring and described outer wellhead edge is tightly connected.
2. a kind of well head tieback connector as claimed in claim 1 is characterized in that: the bottom of described shell is provided with the convenient horn mouth that inserts the well head outer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100756405A CN102155181A (en) | 2011-03-28 | 2011-03-28 | Wellhead tieback connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100756405A CN102155181A (en) | 2011-03-28 | 2011-03-28 | Wellhead tieback connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102155181A true CN102155181A (en) | 2011-08-17 |
Family
ID=44436827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100756405A Pending CN102155181A (en) | 2011-03-28 | 2011-03-28 | Wellhead tieback connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102155181A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383758A (en) * | 2011-11-22 | 2012-03-21 | 江汉石油钻头股份有限公司 | Guide base wellhead locking device of underwater Christmas tree |
| CN105114025A (en) * | 2015-08-31 | 2015-12-02 | 中国海洋石油总公司 | Connector for undersea Christmas tree |
| CN105179815A (en) * | 2015-09-11 | 2015-12-23 | 中国海洋石油总公司 | Gas-injection and water-drainage sealing mechanism under pulling state |
| CN105214358A (en) * | 2015-09-22 | 2016-01-06 | 成都易态科技有限公司 | Quick-changing type filter element and preparation method thereof |
| CN106285534A (en) * | 2016-11-16 | 2017-01-04 | 重庆前卫科技集团有限公司 | A kind of subsea production tree tree body sends into recovery instrument |
| CN108561094A (en) * | 2018-05-19 | 2018-09-21 | 山东科瑞机械制造有限公司 | A kind of subsea production tree decentralization installation testing tool |
| CN111980618A (en) * | 2020-09-23 | 2020-11-24 | 中油国家油气钻井装备工程技术研究中心有限公司 | Well head connector with emergency mechanical unlocking function |
| CN113107779A (en) * | 2021-05-18 | 2021-07-13 | 中国石油大学(北京) | Quick connecting device of fan tower and lower part foundation |
| CN114320275A (en) * | 2022-01-05 | 2022-04-12 | 中海石油(中国)有限公司 | Emergency release working condition simulation test method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2142402A (en) * | 1983-06-29 | 1985-01-16 | Fmc Corp | Subsea well casing tieback connector |
| US20050145391A1 (en) * | 2004-01-06 | 2005-07-07 | Huy Lequang | Split locking ring for wellhead components |
| US20070181309A1 (en) * | 2004-07-23 | 2007-08-09 | Fmc Technologies, Inc. | Slimline tieback connector |
| CN101806199A (en) * | 2010-03-19 | 2010-08-18 | 中国石油天然气集团公司 | Sea deepwater hydraulic connector |
| US20100288503A1 (en) * | 2009-02-25 | 2010-11-18 | Cuiper Glen H | Subsea connector |
| GB2479602A (en) * | 2010-04-14 | 2011-10-19 | Aker Subsea Ltd | Subsea wellhead with a segmented fatigue reduction sleeve |
| CN202031521U (en) * | 2011-03-28 | 2011-11-09 | 中国海洋石油总公司 | Wellhead tieback connector |
-
2011
- 2011-03-28 CN CN2011100756405A patent/CN102155181A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2142402A (en) * | 1983-06-29 | 1985-01-16 | Fmc Corp | Subsea well casing tieback connector |
| US20050145391A1 (en) * | 2004-01-06 | 2005-07-07 | Huy Lequang | Split locking ring for wellhead components |
| US20070181309A1 (en) * | 2004-07-23 | 2007-08-09 | Fmc Technologies, Inc. | Slimline tieback connector |
| US20100288503A1 (en) * | 2009-02-25 | 2010-11-18 | Cuiper Glen H | Subsea connector |
| CN101806199A (en) * | 2010-03-19 | 2010-08-18 | 中国石油天然气集团公司 | Sea deepwater hydraulic connector |
| GB2479602A (en) * | 2010-04-14 | 2011-10-19 | Aker Subsea Ltd | Subsea wellhead with a segmented fatigue reduction sleeve |
| CN202031521U (en) * | 2011-03-28 | 2011-11-09 | 中国海洋石油总公司 | Wellhead tieback connector |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383758A (en) * | 2011-11-22 | 2012-03-21 | 江汉石油钻头股份有限公司 | Guide base wellhead locking device of underwater Christmas tree |
| CN102383758B (en) * | 2011-11-22 | 2014-08-13 | 江汉石油钻头股份有限公司 | Guide base wellhead locking device of underwater Christmas tree |
| CN105114025A (en) * | 2015-08-31 | 2015-12-02 | 中国海洋石油总公司 | Connector for undersea Christmas tree |
| CN105179815B (en) * | 2015-09-11 | 2017-06-16 | 中国海洋石油总公司 | Gas injection draining sealing mechanism under a kind of drawing state |
| CN105179815A (en) * | 2015-09-11 | 2015-12-23 | 中国海洋石油总公司 | Gas-injection and water-drainage sealing mechanism under pulling state |
| CN105214358A (en) * | 2015-09-22 | 2016-01-06 | 成都易态科技有限公司 | Quick-changing type filter element and preparation method thereof |
| CN105214358B (en) * | 2015-09-22 | 2018-08-17 | 成都易态科技有限公司 | Quick-changing type filter element and preparation method thereof |
| CN106285534A (en) * | 2016-11-16 | 2017-01-04 | 重庆前卫科技集团有限公司 | A kind of subsea production tree tree body sends into recovery instrument |
| CN108561094A (en) * | 2018-05-19 | 2018-09-21 | 山东科瑞机械制造有限公司 | A kind of subsea production tree decentralization installation testing tool |
| CN111980618A (en) * | 2020-09-23 | 2020-11-24 | 中油国家油气钻井装备工程技术研究中心有限公司 | Well head connector with emergency mechanical unlocking function |
| CN113107779A (en) * | 2021-05-18 | 2021-07-13 | 中国石油大学(北京) | Quick connecting device of fan tower and lower part foundation |
| CN113107779B (en) * | 2021-05-18 | 2022-06-14 | 中国石油大学(北京) | Quick connecting device of fan tower and lower part foundation |
| CN114320275A (en) * | 2022-01-05 | 2022-04-12 | 中海石油(中国)有限公司 | Emergency release working condition simulation test method |
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Application publication date: 20110817 |