CN111219161B - Wellhead system for underwater resource exploitation - Google Patents
Wellhead system for underwater resource exploitation Download PDFInfo
- Publication number
- CN111219161B CN111219161B CN202010302862.5A CN202010302862A CN111219161B CN 111219161 B CN111219161 B CN 111219161B CN 202010302862 A CN202010302862 A CN 202010302862A CN 111219161 B CN111219161 B CN 111219161B
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- sleeve
- catcher
- periphery
- casing
- pipe
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- 239000000725 suspension Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/043—Casing heads; Suspending casings or tubings in well heads specially adapted for underwater well heads
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to a wellhead system for the exploitation of underwater resources, comprising: the casing is used for exploiting underwater resources; the casing head is arranged at the top end of the casing; the suction pile is arranged on the periphery of the sleeve in a covering mode; the suction pile is coated on the inner upper end of the periphery of the sleeve, the sleeve catcher is arranged at the upper end of the inner side of the periphery of the sleeve, the periphery of the sleeve is provided with a locking structure matched with the sleeve catcher in structure, and the locking structure is structurally matched with the slope surface of the inner periphery of the upper end of the sleeve catcher through the slope surface of the periphery of the lower end of the locking structure, so that the locking structure and the sleeve catcher are matched to form a 'double-suspension' structure for reducing water flow resistance when the sleeve. The wellhead system for underwater resource exploitation provided by the invention has the advantages that the installation levelness can be controlled within +/-1 degree; no well cementation is needed, so the offshore operation time is saved; the underwater wellhead system can be completely recycled, and the use is very convenient.
Description
Technical Field
The invention relates to the technical field of underwater resource exploitation, in particular to a wellhead system for underwater resource exploitation.
Background
The conventional underwater oil and gas exploitation adopts an underwater wellhead system which consists of a plurality of layers of casings, a wellhead base and a wellhead head, hundreds of meters of casings are required to be completely inserted into a seabed mud layer and well-fixed, and the method has 3 defects: the installation levelness of the wellhead base is difficult to control and is generally +/-3 degrees; the well drilling and cementing operation time is long, and the offshore operation cost is high; the underwater wellhead system has high recovery difficulty, can only recover the wellhead head and the wellhead base part, and has low recovery utilization rate. Therefore, a new type of underwater resource exploitation wellhead system is needed.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the wellhead system for underwater resource exploitation, which has high installation levelness and saves the operation time on the sea.
The invention relates to a wellhead system for exploiting underwater resources, which comprises:
the casing is used for exploiting underwater resources;
the casing head is arranged at the top end of the casing;
the suction pile is arranged on the periphery of the sleeve in a covering mode;
the suction pile is coated on the inner upper end of the periphery of the sleeve, the sleeve catcher is arranged at the upper end of the inner side of the periphery of the sleeve, the periphery of the sleeve is provided with a locking structure matched with the sleeve catcher in structure, and the locking structure is structurally matched with the slope surface of the inner periphery of the upper end of the sleeve catcher through the slope surface of the periphery of the lower end of the locking structure, so that the locking structure and the sleeve catcher are matched to form a 'double-suspension' structure for reducing water flow resistance when the sleeve.
The suction pile comprises an inner supporting tube close to the sleeve and an outer supporting tube far away from the sleeve, and the outer supporting tube covers the inner supporting tube, so that the suction pile is integrally of a cylindrical structure with a through hole for accommodating the sleeve in the middle;
the inner supporting tube and the outer supporting tube are connected through three supporting connecting plates, and the stable structure of the suction pile is achieved.
Wherein the three support connecting plates comprise an upper support connecting plate, a middle support connecting plate and a lower support connecting plate, wherein,
the upper support connecting plate extends from the inner support pipe to the outer support pipe along the top end of the sleeve catcher;
the middle support connecting plate extends from the inner support pipe to the outer support pipe along the middle part of the outer side of the sleeve catcher;
the lower support connecting plate extends from the inner support pipe to the outer support pipe along the bottom end of the inner support pipe.
Wherein, the upper supporting connecting plate is connected with the top end of the sleeve catcher through a horn mouth structure which is inclined from inside to outside.
A righting structure is arranged between the suction pile and the casing pipe, is tubular and is sleeved outside the casing pipe and inside the suction pile.
The top end and the bottom end of the righting structure are both in slope-shaped inclined structures from inside to outside along the direction of the pipe wall.
The bottom end of the righting structure is of a slope-shaped structure inclining downwards along the direction of the pipe wall from inside to outside;
the top end of the righting structure is of an upward inclined slope structure from inside to outside along the direction of the pipe wall.
The locking structure covers the sleeve, the inner side wall structure of the locking structure is matched with the structure of the outer side wall of the sleeve, and the lower end of the outer side wall of the locking structure is provided with a slope matched with the sleeve catcher.
Wherein, the sleeve pipe trapper includes bottom, middle part and top, and the middle part is accomplished the linking of bottom and top, and wherein, the diameter everywhere in bottom equals, and the diameter everywhere in top also equals, and the diameter at top is greater than the diameter of bottom, sets up in the middle part with locking structure matched with domatic.
The diameter of the middle part is increased progressively along the direction from the bottom to the top, so that the middle part is in a horn mouth structure with an upward opening.
The invention has the beneficial effects that:
the wellhead system for underwater resource exploitation provided by the invention has the advantages that the installation levelness can be controlled within +/-1 degree; the offshore operation time is saved; and the underwater wellhead system can be completely recycled, so that the use is very convenient.
By arranging the suction piles, the invention saves the use of a wellhead base, improves the installation levelness, does not need well cementation and saves the operation time on the sea. Through the arrangement of the bell mouth structures at all positions, the split type underwater integration of the suction pile, the sleeve and the sleeve head is facilitated, and the whole wellhead system can be recycled.
The sleeve catcher is convenient for guiding, positioning and hanging and bearing the sleeve through the structural arrangement of the conical surface slope of the sleeve catcher. Through the setting of righting the structure, conveniently satisfy the axiality requirement of casing head and suction stake.
Drawings
FIG. 1: the invention provides a structural schematic diagram of a wellhead system for exploiting underwater resources;
FIG. 2: the structure of the suction pile is shown schematically;
FIG. 3: a top view of the centralizing structure of the invention.
Description of the reference numerals
10-casing, 20-casing head;
30-suction pile, 31-casing catcher, 32-inner support tube, 33-outer support tube, 34-upper support connecting plate, 35-middle support connecting plate, 36-lower support connecting plate, 37-bell mouth structure, 311-bottom, 312-middle, 313-top;
40-locking structure and 50-righting structure.
Detailed Description
In order to further understand the technical scheme and the advantages of the present invention, the following detailed description of the technical scheme and the advantages thereof is provided in conjunction with the accompanying drawings.
Fig. 1 is a schematic structural diagram of a wellhead system for mining of underwater resources, according to the present invention, as shown in fig. 1, the wellhead system for mining of underwater resources, according to the present invention, comprises:
a casing 10 for the exploitation of underwater resources;
a casing head 20 disposed at the top end of the casing 10;
and a suction pile 30 covering the outer circumference of the casing 10.
Wherein, the suction pile 30 is provided with a sleeve catcher 31 at the upper end of the inner side of the periphery of the sleeve 10, the periphery of the sleeve 10 is provided with a locking structure 40 structurally matched with the sleeve catcher 31, and the locking structure 40 is structurally matched with the slope surface of the inner periphery of the upper end of the sleeve catcher 31 through the slope surface of the periphery of the lower end of the locking structure 40.
Specifically, please refer to fig. 2, which is a schematic structural diagram of the suction pile of the present invention, as shown in fig. 1 and 2, the suction pile 30 of the present invention includes an inner support tube 32 close to the casing 10 and an outer support tube 33 far from the casing 10, the outer support tube 33 covers the inner support tube 32, so that the suction pile 30 generally presents a cylindrical structure with a through hole in the middle for accommodating the casing 10; the inner support tube 32 and the outer support tube 33 are connected by three support connection plates.
Specifically, the three support connection plates are an upper support connection plate 34, a middle support connection plate 35 and a lower support connection plate 36, wherein the upper support connection plate 34 extends from the inner support tube 32 to the outer support tube 33 along the top end of the casing catcher 31; the middle support web 35 extends from the inner support tube 32 to the outer support tube 33 along the middle of the outside of the casing trap 31; a lower support web 36 extends from the inner support tube 32 to the outer support tube 33 along the bottom end of the inner support tube 32; the structural setting of a plurality of supporting connection boards, the stable in structure of suction stake can be realized on the one hand, on the other hand can be well with power dispersion, thereby further guarantee underwater operation's stability, it is concrete, sleeve pipe 10 passes through locking structure 40 and realizes being connected the back with suction stake 30, locking structure 40 will do all can the power and transmit for sleeve pipe trapper 31, sleeve pipe trapper 31 will do all can the power dispersion again and give three supporting connection board, thereby reduce stress concentration's phenomenon, avoid suction stake 30 local fracture, conveniently hang and bear etc..
In addition, in the present invention, the upper supporting connection plate 34 is connected to the top end of the casing catcher 31 through a bell-mouth structure 37 inclined from inside to outside, specifically, the diameter of the bell-mouth structure 37 decreases progressively from top to bottom, and since the suction pile 30 is placed first and the casing 10 together with the casing head 20 is sleeved in the through hole in the middle of the suction pile 30 when a product is placed in the seabed operation, the arrangement of the bell-mouth structure 37 can facilitate guiding and positioning of the casing 10.
Referring to fig. 1 and 2, in the present invention, the sleeve catcher 31 includes three portions, namely a bottom portion 311, a middle portion 312 and a top portion 313, to respectively realize the engagement with the three supporting connection plates, and at the same time, the whole sleeve catcher 31 also presents a structure with gradually increased diameter from bottom to top, so as to stably connect and position with the locking structure 40, specifically, the diameters of all the portions of the bottom portion 311 are equal, the bottommost side of the bottom portion 311 is connected with the inner supporting tube 32, the inner diameter of the portion of the top portion 313, which is engaged with the bell mouth structure 37 at the topmost end thereof, presents a small gradually increased structure, and the outer diameters are equal, that is, the inside of the topmost end of the top portion 313 presents a cut inclined surface to realize the stable engagement with the bell mouth structure 37; the bottom 311 and the top 313 are joined by a middle 312 with increasing diameter, so that the diameter of the top 313 is larger than that of the bottom 311, and the inner side of the middle 313 is provided with a bell-mouth structure with an upward opening, so as to facilitate the guiding and positioning of the sleeve 10 and the locking structure 40 connected to the sleeve 10; the outer side of the middle portion 312 extends to connect the middle support connection plate 35.
Referring to fig. 1, in the present invention, the locking structure 40 covers the sleeve 10, the inner sidewall structure of the locking structure 40 is matched with the outer sidewall structure of the sleeve 10, and the lower end of the outer sidewall of the locking structure 40 is provided with a slope surface matched with the sleeve catcher 31; due to the difference of the specifications and models of the commercially available casing pipes 10, the outer side wall surfaces of the commercially available casing pipes are in different structures, and the arrangement of the locking structure 40 can compensate the inconvenience in assembly caused by the difference, so that various types of casing pipes 10 can be stably structured with the suction pile 30 provided by the invention, and the locking structure 40 is matched with the structural arrangement of the casing pipe catcher 31, so that the split type underwater integration of the casing head 20, the casing pipes 10 and the suction pile 30 is conveniently realized.
Referring to fig. 1, in order to further satisfy the requirement of coaxiality during the underwater integration of the casing head 20 and the suction pile 30, a centralizing structure 50 is additionally arranged between the suction pile 30 and the casing 10, wherein the centralizing structure 50 is tubular and is sleeved outside the casing 10 and inside the suction pile 20.
Similarly, for convenience of installation and guiding and positioning, the top end and the bottom end of the righting structure 50 are both in a slope-shaped inclined structure from inside to outside along the direction of the pipe wall; specifically, the bottom end of the righting structure 50 presents a downward-inclined slope structure, i.e., a bell mouth structure with a downward opening, along the pipe wall direction from inside to outside, and the top end of the righting structure 50 presents an upward-inclined slope structure, i.e., a bell mouth structure with an upward opening, along the pipe wall direction from inside to outside. The design principle and effect are the same as the bell mouth structure described above, and it is easy to understand for those skilled in the art.
Finally, please refer to fig. 3, which is a top view of the centralizing structure 50 of the present invention, as shown in fig. 3, the centralizing structure 50 of the present invention has a plurality of openings uniformly spaced along its circumferential direction, that is, the centralizing structure 50 does not completely seal the bottom gap between the casing 10 and the suction pile 30, so that, when installing the wellhead system, the water on the seabed can move upwards along the gap in the centralizing structure 50 during the casing 10 moves downwards along the opening in the middle of the suction pile 30; meanwhile, the sleeve catcher 31 and the locking structure 40 on the suction pile 30 form a structure similar to a "double suspension", which can further reduce the resistance of the upward movement of the seawater, so as to correspondingly reduce the resistance of the downward movement of the sleeve 10, before the sleeve 10 and the suction pile 30 are completely combined, the seawater will continuously move upward in the gap between the outer wall of the sleeve 10 and the inner wall of the suction pile 30, and after the resistance of the seawater is reduced, the sleeve 10 can be assembled into the suction pile 30 more smoothly.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that the scope of the present invention is not limited thereto, and those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit and scope of the present invention.
Claims (7)
1. A wellhead system for the production of subsea resources, comprising:
the casing is used for exploiting underwater resources;
the casing head is arranged at the top end of the casing;
the suction pile is arranged on the periphery of the sleeve in a covering mode;
the suction pile is coated on the upper end of the inner side of the periphery of the sleeve and is provided with a sleeve catcher, the periphery of the sleeve is provided with a locking structure matched with the sleeve catcher in structure, and the locking structure is structurally matched with the slope surface of the inner periphery of the upper end of the sleeve catcher through the slope surface of the periphery of the lower end of the locking structure, so that the locking structure and the sleeve catcher are matched to form a double-suspension structure for reducing water flow resistance when the sleeve moves downwards;
the locking structure is arranged to cover the sleeve, the inner side wall structure of the locking structure is matched with the structure of the outer side wall of the sleeve, and the lower end of the outer side wall of the locking structure is provided with a slope surface matched with the sleeve catcher;
the sleeve catcher comprises a bottom part, a middle part and a top part, the middle part is used for connecting the bottom part and the top part, the diameters of all parts at the bottom part are equal, the diameters of all parts at the top part are also equal, the diameter of the top part is larger than that of the bottom part, and a slope surface matched with the locking structure is arranged at the middle part;
the diameter of the middle part increases progressively along the direction from the bottom to the top, so that the middle part presents a horn mouth structure with an upward opening.
2. A wellhead system for the production of subsea resources as claimed in claim 1, wherein: the suction pile comprises an inner supporting tube close to the sleeve and an outer supporting tube far away from the sleeve, and the outer supporting tube covers the inner supporting tube, so that the suction pile is integrally of a cylindrical structure with a through hole for accommodating the sleeve in the middle;
the inner supporting tube and the outer supporting tube are connected through three supporting connecting plates, and the stable structure of the suction pile is achieved.
3. A wellhead system for the production of subsea resources as claimed in claim 2, in which:
the three support connecting plates comprise an upper support connecting plate, a middle support connecting plate and a lower support connecting plate, wherein,
the upper support connecting plate extends from the inner support pipe to the outer support pipe along the top end of the sleeve catcher;
the middle support connecting plate extends from the inner support pipe to the outer support pipe along the middle part of the outer side of the sleeve catcher;
the lower support connecting plate extends from the inner support pipe to the outer support pipe along the bottom end of the inner support pipe.
4. A wellhead system for the production of subsea resources as claimed in claim 3, wherein: go up the support connecting plate and the top of sleeve pipe trapper, link up through a horn mouth structure of inside to outside slope.
5. A wellhead system for the production of subsea resources as claimed in claim 1, wherein: a righting structure is arranged between the suction pile and the casing pipe, is tubular and is sleeved outside the casing pipe and inside the suction pile.
6. A wellhead system for the production of subsea resources as claimed in claim 5, in which: the top end and the bottom end of the righting structure are both in slope-shaped inclined structures from inside to outside along the direction of the pipe wall.
7. A wellhead system for the production of subsea resources as claimed in claim 6, wherein: the bottom end of the righting structure is of a slope-shaped structure which is inclined downwards along the direction of the pipe wall from inside to outside;
the top end of the righting structure is of an upward inclined slope structure from inside to outside along the direction of the pipe wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010302862.5A CN111219161B (en) | 2020-04-17 | 2020-04-17 | Wellhead system for underwater resource exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010302862.5A CN111219161B (en) | 2020-04-17 | 2020-04-17 | Wellhead system for underwater resource exploitation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111219161A CN111219161A (en) | 2020-06-02 |
| CN111219161B true CN111219161B (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010302862.5A Active CN111219161B (en) | 2020-04-17 | 2020-04-17 | Wellhead system for underwater resource exploitation |
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| CN (1) | CN111219161B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230243242A1 (en) * | 2022-02-03 | 2023-08-03 | Baker Hughes Energy Technology UK Limited | Compliant well insert sleeves |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20085187L (en) * | 2008-12-12 | 2010-06-14 | Sclantic Subsea As | Suction foundation device |
| GB201402176D0 (en) * | 2014-02-07 | 2014-03-26 | Enovate Systems Ltd | Wellbore installation apparatus and associated methods |
| GB2554102A (en) * | 2016-09-20 | 2018-03-28 | Statoil Petroleum As | Wellhead assembly |
| NO20170180A1 (en) * | 2017-02-06 | 2018-08-07 | New Subsea Tech As | An apparatus for performing at least one operation to construct a well subsea, and a method for constructing a well |
| EP3597854A1 (en) * | 2018-07-20 | 2020-01-22 | Neodrill AS | Arrangement for supporting a wellhead |
| CN109611050A (en) * | 2018-11-08 | 2019-04-12 | 中国海洋石油集团有限公司 | A kind of dedicated subsea equipment in deep water gas field |
| CN109763790A (en) * | 2019-03-14 | 2019-05-17 | 深圳迪玛深蓝科技有限公司 | A kind of light-duty underwater well head suitable for gas hydrates exploitation |
| CN110185409B (en) * | 2019-07-09 | 2023-12-12 | 广州海洋地质调查局 | Separated underwater wellhead suction anchor for efficient processing and transportation |
| CN110273648A (en) * | 2019-07-19 | 2019-09-24 | 广州海洋地质调查局 | A kind of deep-sea drilling drilling tool reentries drilling equipment and technique |
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- 2020-04-17 CN CN202010302862.5A patent/CN111219161B/en active Active
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