CN102900405A - Tieback assembly for marine underground wellhead - Google Patents
Tieback assembly for marine underground wellhead Download PDFInfo
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- CN102900405A CN102900405A CN2012103985241A CN201210398524A CN102900405A CN 102900405 A CN102900405 A CN 102900405A CN 2012103985241 A CN2012103985241 A CN 2012103985241A CN 201210398524 A CN201210398524 A CN 201210398524A CN 102900405 A CN102900405 A CN 102900405A
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- tieback
- head
- sea
- sleeve pipe
- underwater well
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Abstract
The invention discloses a tieback assembly for a marine underground wellhead. The tieback assembly mainly comprises a riser pipe, a tieback head, a 133/8'' casing pipe, a 133/8'' casing pipe tieback head, a 95/8'' casing pipe, a 95/8'' casing pipe tieback head, a tieback hanger and the like. When the tieback operation is required for the marine underground wellhead, the tieback head is in locking connection with the marine underground wellhead through a locking block and the tieback head is sealed with the marine underground wellhead through a seal V and a seal VI; the 133/8'' casing pipe tieback head is in threaded connection with the tieback hanger and is sealed with the tieback hanger through a seal VII; and the 95/8'' casing pipe tieback head is connected with the tieback hanger through threads on a connecting ring and is annually sealed by metal seal. The tieback assembly disclosed by the invention is compact in structure and convenient in operation and better meets the requirement of a tieback process of the marine underground wellhead.
Description
Technical field
The invention belongs to sea oil drilling and production equipment technology field, relate to a kind of underwater well head in sea tieback assembly.
Background technology
When carrying out oil-gas mining in the shallow sea, after offshore boring island has bored a bite well, adopt all generally that fixed platform recovers the oil, the gas production operation, owing between fixed platform and the underwater well head in sea a very long segment distance being arranged, so adopt the underwater well head in sea tieback assembly to come insulating sea water, for setting up a gas channel between fixed platform and the underwater well head in sea.
The underwater well head in sea tieback assembly is the unimpeded assurance of gas channel, and each layer sleeve pipe accepted in its upper end, and the lower end connects underwater well head in sea, plays the effect of forming a connecting link.For guaranteeing the quality of safety and tieback operation, the underwater well head in sea tieback assembly generally adopts 3 layers of tieback string, and its operation procedure generally is first tieback riser pipe, then tieback 133/8 〃 sleeve pipe, at last tieback 95/8 〃 sleeve pipe.After fixed platform installs the platform production tree, be lowered in 95/8 〃 sleeve pipe tieback string that oil pipe just can recover the oil, the gas production operation.
Between existing this underwater well head in sea tieback assembly and the underwater well head in sea, because distance, attended operation is complicated, and inefficiency has affected it and used widely.
Summary of the invention
The purpose of this invention is to provide a kind of underwater well head in sea tieback assembly, solved the prior art distance, attended operation is complicated, ineffective problem.
The technical solution adopted in the present invention is, a kind of underwater well head in sea tieback assembly,
Comprise riser pipe and tieback head, riser pipe is connected with the tieback head by screw thread,
The structure of tieback head is, comprises successively from top to bottom upper end cover, rotating ring, stay pipe, drive block, upper end contiguous block, guide holder, lower end contiguous block and latch segment,
Described upper end cover is fixedly connected with guide holder by the bolt in the outer step through-hole, is provided with rotating ring between the inner circle step between upper end cover and the guide holder, and the inner circle middle part of rotating ring is provided with groove; Bolt circle between upper end cover and guide holder is set with stay pipe, and stay pipe hypomere excircle is set with drive block;
The guide holder lower end is connected with latch segment, underwater well head in sea contact;
The excircle socket of upper end contiguous block lower end inner periphery and lower end contiguous block upper end, the inner periphery of upper end contiguous block is sleeved on the excircle of upper end cover excircle, drive block simultaneously, and the inner periphery of lower end contiguous block is sleeved on guide holder excircle and the latch segment excircle simultaneously.
The invention has the beneficial effects as follows: drive the locking that retaining mechanism can be realized underwater well head in sea tieback assembly and underwater well head in sea by special tool, can realize the metal to metal seal tieback of underwater well head in sea and fixed platform by driving connecting ring, for underwater well head in sea and fixed platform provide safe gas channel, save the development cost of offshore oil, shorten the time that offshore oil and gas field is gone into operation; Compact conformation, easy to operate has satisfied the requirement of underwater well head in sea tieback technique preferably.
Description of drawings
Fig. 1 is the structural representation of underwater well head in sea tieback assembly of the present invention;
Fig. 2 is the structural representations of apparatus of the present invention when tieback 133/8 〃 sleeve pipe 22;
Fig. 3 is the structural representations of apparatus of the present invention when tieback 95/8 〃 sleeve pipe 27.
Among the figure, 1. riser pipe, 2. tieback head, 3. upper end cover, 4. bolt 5. seals I, 6. sealing II, 7. rotating ring, 8. stay pipe, 9. groove, 10. drive block, 11. upper end contiguous blocks, 12. the sealing III, 13. sealing IV, 14. guide holders, 15. sealing V, 16. the sealing VI, 17. lower end contiguous blocks, 18. latch segments, 19. underwater well head in sea, 20. metal sealing assemblys, 21. tieback hangers, 22.133/8 the 〃 sleeve pipe, 23.133/8 〃 sleeve pipe tieback head, 24. sealing VII, 25. sealing surface A, 26. inclined-planes, 27.95/8 〃 sleeve pipe, 28. crossover sub, 29.95/8 〃 sleeve pipe tieback head, 30. metal sealings, 31. sealing surface B, 32. step I, 33. connecting rings.
The specific embodiment
With reference to Fig. 1, Fig. 2, Fig. 3, underwater well head in sea tieback assembly structure of the present invention is, comprises the tieback head 2 of riser pipe 1 and riser pipe, and riser pipe 1 is connected connection by screw thread with the tieback head.Tieback head 2 is upper end cover 3, rotating ring 7, stay pipe 8, drive block 10, upper end contiguous block 11, guide holder 14, lower end contiguous block 17 and latch segment 18 from top to bottom; Upper end cover 3 is fixedly connected with guide holder 14 by the bolt 4 in the outer step through-hole, between the inner circle step between upper end cover 3 and the guide holder 14, be provided with rotating ring 7, the inner circle middle part of rotating ring 7 is provided with groove 9, bolt 4 circumference between upper end cover 3 and guide holder 14 are set with stay pipe 8(and play a supportive role), stay pipe 8 hypomere excircles are set with drive block 10, and guide holder 14 lower ends are connected with latch segment 18, underwater well head in sea 19 contacts; The excircle socket of upper end contiguous block 11 lower end inner peripherys and lower end contiguous block 17 upper ends, the inner periphery of upper end contiguous block 11 is sleeved on (pressing parcel) simultaneously on the excircle of upper end cover 3 excircles, drive block 10, and the inner periphery of lower end contiguous block 17 is sleeved on (pressing parcel) guide holder 14 excircles and latch segment 18 excircles simultaneously;
Be provided with sealing I 5 between rotating ring 7 upper end outer walls and the upper end cover 3 lower end step inwalls; Be provided with sealing IV 13 between rotating ring 7 lower end outer walls and the guide holder 14 upper end step inwalls; Be provided with sealing II 6 between upper end cover 3 outer walls and the upper end contiguous block 11 inwall contact surfaces; Be provided with sealing III 12 between lower end contiguous block 17 inwalls and guide holder 14 outer walls; Be respectively arranged with sealing V 15, sealing VI 16 between underwater well head in sea 19 upper surfaces and inner periphery inclined-plane and the guide holder 14 corresponding contact surfaces.
With reference to Fig. 2, in the inner chamber of tieback head 2 and underwater well head in sea 19, be used for being lowered to 133/8 〃 sleeve pipe 22,133/8 〃 sleeve pipe tieback head 23 and tieback hanger 21,133/8 〃 sleeve pipe, 22 lower end excircles and 133/8 〃 sleeve pipe tieback head, 23 upper end inner peripherys link by casing threads and connect, and 133/8 〃 sleeve pipe tieback head 23 lower end excircles and tieback hanger 21 upper end inner peripherys are threaded connection.
Be provided with between tieback hanger 21 upper end excircles and underwater well head in sea 19 inner peripherys and be provided with sealing VII 24 between the sealing surface A25 of metal sealing assembly 20,133/8 〃 sleeve pipe tieback heads 23 and tieback hanger 21; The sealing surface A25 below of tieback hanger 21 is provided with inclined-plane 26.
With reference to Fig. 3,133/8 〃 sleeve pipe 22 and 133/8 〃 sleeve pipe tieback head, 23 inner chambers are used for being lowered to 95/8 〃 sleeve pipe 27, crossover sub 28,95/8 〃 sleeve pipe tieback head 29 and connecting ring 33,95/8 〃 sleeve pipe, 27 lower end excircles are connected by casing threads with crossover sub 28 upper end inner peripherys, crossover sub 28 lower end excircles are connected by casing threads with 95/8 〃 sleeve pipe tieback head, 29 inner peripherys, 95/8 〃 sleeve pipe tieback head, 29 inner peripherys are set with connecting ring 33, and connecting ring 33 lower end excircles and tieback hanger 21 are threaded connection; 95/8 〃 sleeve pipe tieback head, 29 lower ends are sitting on the step I 32 of tieback hanger 21 inner surfaces, are provided with metal sealing 30 between the sealing surface B31 of 95/8 〃 sleeve pipe tieback head 29 lower end excircles and tieback hanger 21.
Metal sealing 30 between 95/8 〃 sleeve pipe tieback head 29 and the tieback hanger 21 is direct insertion, rotary squeezing shape metallic leak-proof structure.
The operating principle of apparatus of the present invention is, when underwater well head in sea needs tieback to carry out on the platform christmas to fixed platform, according to the oil drilling technological requirement, metal sealing assembly 20 and tieback hanger 21 are lowered to well head with production string, be sitting in the underwater well head in sea, after pressure testing is qualified, carry out the tieback operation.Before carrying out the tieback operation, at first to check each tieback head thread and sealing, and thoroughly clean, coat butter.Secondly, the function of each tieback head and special tool etc. is checked the locking situation of checking tieback head and the position of rotation of special tool.The order of underwater well head in sea tieback generally is from the large scale sleeve pipe to the small size sleeve pipe, i.e. first tieback riser pipe 1, then tieback 133/8 〃 sleeve pipe 22, at last tieback 95/8 〃 sleeve pipe 27.
The tieback course of work of apparatus of the present invention is,
1) as shown in Figure 1, after fixed platform installs, after the sealing of the metal sealing assembly 20 between check underwater well head in sea 19 and the tieback hanger 21 is safe and reliable, under the help of ROV, tieback head 2 is along with riser pipe 1 is lowered to together, until tieback head 2 is sitting on the underwater well head in sea 19.At this moment, sealing V 15 and sealing VI 16 respectively with the fine applying in underwater well head in sea 19 upper surfaces and inner periphery inclined-plane, form sealing.Then, be lowered to special tool from fixed platform, insert in the groove 9 of tieback head 2 inner chambers, the retaining mechanism of tieback head 2 is applied the right-hand thread moment of torsion, driving latch segment 18 enters in the underwater well head in sea 19 upper end excircle locking grooves, so that tieback head 2 locking underwater well head in seas 19.Qualified through pressure testing, by designing requirement cutting riser pipe 1,203/4 〃 platform well mouth casing head is installed after carrying in advance, finish the tieback of riser pipe 1.
2) as shown in Figure 2, when 133/8 〃 sleeve pipe tieback head 23 transfer along with 133/8 〃 sleeve pipe 22 put in place after, the screw thread pin thread of 133/8 〃 sleeve pipe tieback head, 23 lower end excircles and tieback hanger 21 upper end inner periphery screw thread boxes are meshed.Then, utilize the tong instrument ROT13 3/8 〃 sleeve pipe 22 of 133/8 〃 sleeve pipe 22, so that 133/8 〃 sleeve pipe tieback head 23 moves down, until 133/8 〃 sleeve pipe tieback head, 23 lower ends are sitting on the inclined-plane 26 of tieback hanger 21.At this moment, 133/8 〃 sleeve pipe tieback head 23 lower end excircles and the fine applying of tieback hanger 21 upper end sealing surface A25 are so that sealing VII 24 forms sealing with tieback hanger 21 upper end sealing surface A25.Qualified through pressure testing, after carrying in advance, sit slips, by the designing requirement cutting, 203/4 〃 * 135/8 〃 platform well mouth casing head is installed, finish the tieback of 133/8 〃 sleeve pipe 22.
3) as shown in Figure 3,95/8 〃 sleeve pipe tieback head 29, metal sealing 30, crossover sub 28 and connecting ring 33 assemble rear along with 95/8 〃 sleeve pipe 27 is transferred, until 95/8 〃 sleeve pipe tieback head, 29 lower ends are sitting on the tieback hanger 21 step I 32.Then, be lowered to special tool from fixed platform, insert on the groove of connecting ring 33, continue to transfer special tool, so that connecting ring 33 screw thread pin threads and tieback hanger 21 lower end inner periphery screw thread boxes are meshed.Then, utilize special tool that connecting ring 33 is applied the right-hand thread moment of torsion so that connecting ring 33 moves down, by rotary squeezing so that metal sealing 30 produces distortion.At this moment, metal sealing 30 and the fine applying of tieback hanger 21 sealing surface B31 form sealing.Qualified through pressure testing, after carrying in advance, sit slips, by the designing requirement cutting, 135/8 〃 * 11 〃 platform well mouth casing heads are installed, finish the tieback of 95/8 〃 sleeve pipe 27.
Claims (7)
1. underwater well head in sea tieback assembly is characterized in that:
Comprise riser pipe (1) and tieback head (2), riser pipe (1) is connected 2 by screw thread with the tieback head) connect,
The structure of tieback head (2) is, comprises successively from top to bottom upper end cover (3), rotating ring (7), stay pipe (8), drive block (10), upper end contiguous block (11), guide holder (14), lower end contiguous block (17) and latch segment (18),
Described upper end cover (3) is fixedly connected with guide holder (14) by the bolt in the outer step through-hole (4), be provided with rotating ring (7) between the inner circle step between upper end cover (3) and the guide holder (14), the inner circle middle part of rotating ring (7) is provided with groove (9); Bolt (4) circumference between upper end cover (3) and guide holder (14) is set with stay pipe (8), and stay pipe (8) hypomere excircle is set with drive block (10);
Guide holder (14) lower end is connected with latch segment (18), underwater well head in sea (19) contact;
The excircle socket of upper end contiguous block (11) lower end inner periphery and lower end contiguous block (17) upper end, the inner periphery of upper end contiguous block (11) is sleeved on the excircle of upper end cover (3) excircle, drive block (10) simultaneously, and the inner periphery of lower end contiguous block (17) is sleeved on guide holder (14) excircle and latch segment (18) excircle simultaneously.
2. underwater well head in sea tieback assembly according to claim 1 is characterized in that: be provided with sealing I (5) between described rotating ring (7) upper end outer wall and upper end cover (3) the lower end step inwall;
Be provided with sealing IV (13) between rotating ring (7) lower end outer wall and guide holder (14) the upper end step inwall;
Be provided with sealing II (6) between upper end cover (3) outer wall and upper end contiguous block (11) the inwall contact surface;
Be provided with sealing III (12) between lower end contiguous block (17) inwall and guide holder (14) outer wall;
Be respectively arranged with sealing V (15), sealing VI (16) between the corresponding contact surface of underwater well head in sea (19) upper surface and inner periphery inclined-plane and guide holder (14).
3. underwater well head in sea tieback assembly according to claim 1 and 2 is characterized in that: the upper end cover (3) of described tieback head (2) upper end is threaded connection with riser pipe (1); The latch segment (18) of tieback head (2) lower end locks and connects with underwater well head in sea (19).
4. underwater well head in sea tieback assembly according to claim 3 is characterized in that: described guide holder (14) lower end circumference is provided with the hole that latch segment (18) is installed, and guide holder (14) bottom is provided with bell guide.
5. underwater well head in sea tieback assembly according to claim 4 is characterized in that: described latch segment (18) is provided with the locking toothed surface that matches with underwater well head in sea (19) upper end excircle.
6. underwater well head in sea tieback assembly according to claim 5, it is characterized in that: in the inner chamber of described tieback head (2) and underwater well head in sea (19), be used for being lowered to 13 3/8 〃 sleeve pipes (22), 13 3/8 〃 sleeve pipe tieback heads (23), metal sealing assembly (20) and tieback hanger (21), 13 3/8 〃 sleeve pipe (22) lower end excircles and 13 3/8 〃 sleeve pipe tieback heads (23) upper end inner periphery link by casing threads and connect, and 13 3/8 〃 sleeve pipe tieback head (23) lower end excircles and tieback hanger (21) upper end inner periphery are threaded connection;
Be provided with metal sealing assembly (20), the sealing surface A(25 of 13 3/8 〃 sleeve pipe tieback heads (23) and tieback hanger (21) between tieback hanger (21) upper end excircle and underwater well head in sea (19) inner periphery) between be provided with and seal VII (24); The sealing surface A(25 of tieback hanger (21)) below is provided with inclined-plane (26).
7. underwater well head in sea tieback assembly according to claim 6, it is characterized in that: described 13 3/8 〃 sleeve pipes (22) and 13 3/8 〃 sleeve pipe tieback head (23) inner chambers are used for being lowered to 9 5/8 〃 sleeve pipes (27), crossover sub (28), 9 5/8 〃 sleeve pipe tieback heads (29) and connecting ring (33), 9 5/8 〃 sleeve pipe (27) lower end excircles are connected by casing threads with crossover sub (28) upper end inner periphery, crossover sub (28) lower end excircle is connected by casing threads with 9 5/8 〃 sleeve pipe tieback head (29) inner peripherys, 9 5/8 〃 sleeve pipe tieback head (29) inner peripherys are set with connecting ring (33), and connecting ring (33) lower end excircle and tieback hanger (21) are threaded connection; 9 5/8 〃 sleeve pipe tieback head (29) lower ends are sitting on the step I (32) of tieback hanger (21) inner surface, the sealing surface B(31 of 9 5/8 〃 sleeve pipe tieback head (29) lower end excircles and tieback hanger (21)) between be provided with metal sealing (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398524.1A CN102900405B (en) | 2012-10-18 | 2012-10-18 | Tieback assembly for marine underground wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210398524.1A CN102900405B (en) | 2012-10-18 | 2012-10-18 | Tieback assembly for marine underground wellhead |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102900405A true CN102900405A (en) | 2013-01-30 |
| CN102900405B CN102900405B (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210398524.1A Active CN102900405B (en) | 2012-10-18 | 2012-10-18 | Tieback assembly for marine underground wellhead |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967454A (en) * | 2014-04-22 | 2014-08-06 | 美钻能源科技(上海)有限公司 | Hydraulic control underwater pipeline horizontal docking and locking device and docking and locking method thereof |
| CN110159220A (en) * | 2019-07-01 | 2019-08-23 | 承德市开发区富泉石油机械有限公司 | Petroleum industry wellhead equipment Quick Connect Kit |
| CN112302573A (en) * | 2020-12-01 | 2021-02-02 | 中国石油天然气集团有限公司 | Ball injector and ball injection method suitable for drainage test operation |
| CN113605853A (en) * | 2021-08-27 | 2021-11-05 | 中海石油(中国)有限公司 | Low-pressure wellhead capable of being connected back |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3664423A (en) * | 1970-03-23 | 1972-05-23 | Gray Tool Co | Tie-back system for underwater completion |
| US4408784A (en) * | 1981-03-06 | 1983-10-11 | Vetco, Inc. | Production casing tieback connector assembly |
| US4519633A (en) * | 1983-06-29 | 1985-05-28 | Fmc Corporation | Subsea well casing tieback connector |
| US5368335A (en) * | 1992-11-02 | 1994-11-29 | Abb Vetco Gray Inc. | Contingency tieback adapter |
| CN102410004A (en) * | 2011-08-05 | 2012-04-11 | 宝鸡石油机械有限责任公司 | Underwater wellhead water-proof guide pipe back connector |
-
2012
- 2012-10-18 CN CN201210398524.1A patent/CN102900405B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3664423A (en) * | 1970-03-23 | 1972-05-23 | Gray Tool Co | Tie-back system for underwater completion |
| US4408784A (en) * | 1981-03-06 | 1983-10-11 | Vetco, Inc. | Production casing tieback connector assembly |
| US4519633A (en) * | 1983-06-29 | 1985-05-28 | Fmc Corporation | Subsea well casing tieback connector |
| US5368335A (en) * | 1992-11-02 | 1994-11-29 | Abb Vetco Gray Inc. | Contingency tieback adapter |
| CN102410004A (en) * | 2011-08-05 | 2012-04-11 | 宝鸡石油机械有限责任公司 | Underwater wellhead water-proof guide pipe back connector |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967454A (en) * | 2014-04-22 | 2014-08-06 | 美钻能源科技(上海)有限公司 | Hydraulic control underwater pipeline horizontal docking and locking device and docking and locking method thereof |
| CN103967454B (en) * | 2014-04-22 | 2016-08-17 | 美钻能源科技(上海)有限公司 | A kind of hydraulic control submarine pipeline horizontal butt-joint locking device and butt-joint locking method |
| CN110159220A (en) * | 2019-07-01 | 2019-08-23 | 承德市开发区富泉石油机械有限公司 | Petroleum industry wellhead equipment Quick Connect Kit |
| CN112302573A (en) * | 2020-12-01 | 2021-02-02 | 中国石油天然气集团有限公司 | Ball injector and ball injection method suitable for drainage test operation |
| CN113605853A (en) * | 2021-08-27 | 2021-11-05 | 中海石油(中国)有限公司 | Low-pressure wellhead capable of being connected back |
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| Publication number | Publication date |
|---|---|
| CN102900405B (en) | 2015-04-01 |
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Effective date of registration: 20210113 Address after: 721002 No.2 Dongfeng Road, Jintai District, Baoji City, Shaanxi Province Patentee after: Baoji Oilfield Machinery Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC national oil and gas drilling equipment Engineering Technology Research Center Co., Ltd Address before: 721002 No. 2 Dongfeng Road, Shaanxi, Baoji Patentee before: Baoji Oilfield Machinery Co.,Ltd. |