CN110656908A - All-metal sealed double-pipe steam injection wellhead device for inclined shaft - Google Patents

All-metal sealed double-pipe steam injection wellhead device for inclined shaft Download PDF

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Publication number
CN110656908A
CN110656908A CN201910947791.1A CN201910947791A CN110656908A CN 110656908 A CN110656908 A CN 110656908A CN 201910947791 A CN201910947791 A CN 201910947791A CN 110656908 A CN110656908 A CN 110656908A
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CN
China
Prior art keywords
hanger
assembly
steam injection
way
head
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
CN201910947791.1A
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Chinese (zh)
Inventor
刘福东
国聪
马锐
刘文科
李雪野
姜超
雷广财
王东升
雷月鑫
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.)
China National Petroleum Corp
CNPC Bohai Equipment Manufacturing Co Ltd
Original Assignee
CNPC Bohai Equipment Manufacturing Co Ltd
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 CNPC Bohai Equipment Manufacturing Co Ltd filed Critical CNPC Bohai Equipment Manufacturing Co Ltd
Priority to CN201910947791.1A priority Critical patent/CN110656908A/en
Publication of CN110656908A publication Critical patent/CN110656908A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (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)
  • Earth Drilling (AREA)

Abstract

The invention discloses an all-metal sealed double-pipe steam injection wellhead device for an inclined well, which relates to the technical field of oil exploitation, wherein a surface casing is sleeved outside a production casing, a simple casing head assembly is welded at the top of the surface casing, a tubing head four-way assembly is welded at the top of the production casing, a parent hanger and a parent suspended metal sealing assembly are arranged in a four-way inner cavity of the tubing head four-way assembly, a child hanger and a child suspended metal sealing assembly are arranged in an inner cavity of the parent hanger, a tubing I and the parent hanger are connected with the four-way inner cavity of the tubing head four-way assembly, a tubing II and the child hanger are connected with the inner cavity of the parent hanger, a steam injection tree assembly is arranged above the tubing head four-way assembly, metal sealing rings are respectively arranged in a top groove of the parent hanger and a top groove of the child hanger, the metal sealing rings are connected with the bottom of a vertical channel of the steam injection tree assembly, the double-pipe steam injection function is realized, and the sealing effect in the inclined state is ensured.

Description

All-metal sealed double-pipe steam injection wellhead device for inclined shaft
Technical Field
The invention relates to the technical field of oil exploitation, in particular to an all-metal sealed double-pipe steam injection wellhead device for an inclined shaft.
Background
In the drilling process of a horizontal well in a shallow oil reservoir layer, because the vertical depth is low, a slant well drilling machine is generally used for ensuring the deflecting requirement. After the process is finished, the well casing and the ground are in an inclined state.
In the Canadian oil sand exploitation process, a large amount of inclined drilling technology is applied, and a completion pipe column forms an included angle of 45 degrees with the ground. Because the sealing assembly is influenced by small axial force and radial force under the special working condition, the sealing assembly has larger difference with a conventional vertical well, the sealing effect is difficult to ensure by the sealing technology used by the conventional vertical well, and the inclined operation mode also easily causes the damage of a sealing element to cause the sealing failure.
Disclosure of Invention
In order to solve the technical problems, the invention provides an all-metal sealing double-pipe steam injection wellhead device for an inclined well, a surface casing is sleeved outside a production casing, a simple casing head assembly is welded on the top of the surface casing, a tubing head four-way assembly is welded on the top of the production casing, a mother hanger and a mother hanging metal sealing assembly are arranged in a four-way inner cavity of the tubing head four-way assembly, a son hanger and a son hanging metal sealing assembly are arranged in an inner cavity of the mother hanger, a first tubing and the mother hanger are connected with the four-way inner cavity of the tubing head four-way assembly, a second tubing and the son hanger are connected with the inner cavity of the mother hanger, a steam injection tree assembly is arranged above the tubing head four-way assembly, a top groove of, the top grooves of the sub-hangers are respectively provided with a metal sealing ring, the metal sealing rings are connected with the bottom of a vertical channel of the steam injection tree assembly, and the main hanger and the sub-hangers are respectively provided with an automatic centering positioning structure.
The technical effects are as follows: the invention designs an all-metal sealed double-pipe steam injection wellhead device which is suitable for inclined well completion working conditions.
The technical scheme of the invention is further defined as follows:
the full-metal sealed double-pipe steam injection wellhead device for the inclined shaft is characterized in that sealing filler is arranged inside the simple sleeve head assembly, and a gland sealing surface sleeve is arranged at the top of the simple sleeve head assembly.
The utility model provides a can be used to the sealed double-barrelled steam injection well head device of all metal of inclined shaft, automatic guide location structure placed in the middle includes: the inner cavities of the sub hanger and the mother hanger are respectively provided with a first conical surface structure which is matched with each other, and the inner cavities of the mother hanger and the tubing head four-way assembly are respectively provided with a second conical surface structure which is matched with each other.
The all-metal sealed double-pipe steam injection wellhead device for the inclined shaft comprises a main suspended metal sealing assembly and a sub suspended metal sealing assembly which are provided with reducing structures.
The invention has the beneficial effects that:
(1) according to the invention, the four-way inner cavity of the four-way assembly of the tubing head is arranged under the mother hanger and the mother suspension metal sealing assembly to complete annular sealing, and the sub hanger and the sub suspension metal sealing assembly are arranged in the inner cavity of the mother hanger to complete sealing of the sub hanger assembly;
(2) the metal sealing ring completes secondary sealing, so that the sealing structure is safe and reliable;
(3) the automatic centering and positioning structure is convenient for inclined installation working conditions, can ensure installation accuracy and offset the influence of the working conditions on radial stress of the primary suspension metal sealing assembly and the secondary suspension metal sealing assembly;
(4) according to the invention, the primary suspension metal sealing assembly and the secondary suspension metal sealing assembly are designed in a reducing structure, so that the collision failure in the process of descending to a target sealing position can be avoided;
(5) the combined design of the primary hanger and the secondary hanger realizes the double-pipe hanging function; all-metal sealing, and safe and reliable sealing.
Drawings
FIG. 1 is a schematic structural view of the present invention;
wherein: 1. a simple casing head assembly; 2. a tubing head four-way assembly; 3. a female suspension metal seal assembly; 4. a female hanger; 5. a sub-suspended metal seal assembly; 6. a sub-hanger; 7. a steam injection tree assembly; 8. a metal seal ring; 9. an oil pipe I; 10. an oil pipe II; 11. producing a sleeve; 12. and (4) a surface sleeve.
Detailed Description
The utility model provides a can be used to double-barrelled steam injection wellhead assembly of all metal seal of inclined shaft, the structure is as shown in figure 1, and outside production casing 11 was located to top casing 12 cover, the welding of 12 tops of top casing has simple and easy casing head subassembly 1, and simple and easy casing head subassembly 1 is inside to be equipped with the packing, and the top is equipped with gland seal surface casing 12. The top of the production casing 11 is welded with an oil pipe head four-way component 2, a four-way inner cavity of the oil pipe head four-way component 2 is provided with a mother hanger 4 and a mother suspension metal sealing component 3, an inner cavity of the mother hanger 4 is provided with a son hanger 6 and a son suspension metal sealing component 5, and the mother suspension metal sealing component 3 and the son suspension metal sealing component 5 are provided with reducing structures. The first oil pipe 9 and the female hanger 4 are connected to a four-way inner cavity of the tubing head four-way assembly 2, the second oil pipe 10 and the secondary hanger 6 are connected to an inner cavity of the female hanger 4, a steam injection tree assembly 7 is arranged above the tubing head four-way assembly 2, metal sealing rings 8 are respectively arranged in a top groove of the female hanger 4 and a top groove of the secondary hanger 6, the metal sealing rings 8 are connected with the bottom of a vertical channel of the steam injection tree assembly 7, the female hanger 4 and the secondary hanger 6 are respectively provided with an automatic centering positioning structure, the primary hanger 6 and the female hanger 4 are respectively provided with a first conical surface structure which is matched with each other, and the primary hanger 4 and the tubing head four-way assembly 2 are respectively provided with a second conical surface structure which is matched with each other, so that the automatic centering function can be realized during installation.
When the wellhead device is installed, the simple casing head assembly 1 is assembled firstly, the production casing 11 is sleeved with the casing head assembly, the casing head assembly is positioned at the top of the surface casing 12 in a welded and fixed mode, the packing gland of the production casing is screwed down, and sealing of the surface casing 12 is completed. And installing the four-way assembly 2 of the oil pipe head, and welding and fixing the four-way assembly with the top of the production casing 11. Putting down the first oil pipe 9, connecting with the female hanger 4 and putting down the first oil pipe into a four-way inner cavity of the four-way assembly 2 of the oil pipe head; and putting down the second oil pipe 10, connecting the second oil pipe with the secondary hanger 6, putting the second oil pipe into the inner cavity of the primary hanger 4, and pressing the jackscrew to complete the sealing of the annular space and the primary hanger 4. And mounting metal sealing rings 8 in grooves at the top of the female hanger 4 and grooves at the top of the sub hanger 6, then positioning the steam injection tree component 7 above the four-way component 2 of the tubing head, and fastening by using bolts, namely finishing the mounting of the whole device.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.

Claims (4)

1. The utility model provides an all-metal seal double-barrelled steam injection well head device that can be used to inclined shaft which characterized in that: the production casing pipe (11) is sleeved with a surface casing pipe (12), a simple casing pipe head assembly (1) is welded at the top of the surface casing pipe (12), a tubing head four-way assembly (2) is welded at the top of the production casing pipe (11), a four-way inner cavity of the tubing head four-way assembly (2) is provided with a mother hanger (4) and a mother suspension metal sealing assembly (3), an inner cavity of the mother hanger (4) is provided with a son hanger (6) and a son suspension metal sealing assembly (5), a first oil pipe (9) and the mother hanger (4) are connected to a four-way inner cavity of the tubing head four-way assembly (2), a second oil pipe (10) and the son hanger (6) are connected to an inner cavity of the mother hanger (4), a steam injection tree assembly (7) is arranged above the tubing head four-way assembly (2), metal sealing rings (8) are respectively arranged in a top groove of the mother hanger (4) and a top groove of the son hanger (6), the metal sealing ring (8) is connected with the bottom of a vertical channel of the steam injection tree component (7), and the female hanger (4) and the sub hanger (6) are provided with automatic centering positioning structures.
2. An all-metal sealed dual-tube steam injection wellhead assembly for slant wells according to claim 1, wherein: the simple sleeve pipe head component (1) is internally provided with a sealing filler, and the top of the simple sleeve pipe head component is provided with a filler gland to seal the surface sleeve pipe (12).
3. An all-metal sealed dual-tube steam injection wellhead assembly for slant wells according to claim 1, wherein: the automatic centering and centering structure comprises: the inner cavities of the sub hanger (6) and the female hanger (4) are respectively provided with a first conical surface structure which is matched with each other, and the inner cavities of the female hanger (4) and the oil pipe head four-way component (2) are respectively provided with a second conical surface structure which is matched with each other.
4. An all-metal sealed dual-tube steam injection wellhead assembly for slant wells according to claim 1, wherein: the mother suspension metal sealing component (3) and the son suspension metal sealing component (5) are provided with reducing structures.
CN201910947791.1A 2019-10-08 2019-10-08 All-metal sealed double-pipe steam injection wellhead device for inclined shaft Pending CN110656908A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910947791.1A CN110656908A (en) 2019-10-08 2019-10-08 All-metal sealed double-pipe steam injection wellhead device for inclined shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910947791.1A CN110656908A (en) 2019-10-08 2019-10-08 All-metal sealed double-pipe steam injection wellhead device for inclined shaft

Publications (1)

Publication Number Publication Date
CN110656908A true CN110656908A (en) 2020-01-07

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Family Applications (1)

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CN201910947791.1A Pending CN110656908A (en) 2019-10-08 2019-10-08 All-metal sealed double-pipe steam injection wellhead device for inclined shaft

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111734338A (en) * 2020-06-30 2020-10-02 濮阳市海华石油机械有限公司 Oil pipe head and casing head device for petroleum development and using method thereof
CN111946289A (en) * 2020-09-08 2020-11-17 中国石油天然气股份有限公司 Multi-channel flow divider for cluster pipe wellhead
CN111946291A (en) * 2020-09-08 2020-11-17 中国石油天然气股份有限公司 Connecting device for inner channel of cluster pipe wellhead pipe cutting butt joint
CN111963094A (en) * 2020-09-08 2020-11-20 中国石油天然气股份有限公司 Cluster pipe two-gas co-production tubular column

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GB839959A (en) * 1956-07-09 1960-06-29 George Aaron Butler Multiple completion well head apparatus
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US4770249A (en) * 1987-03-26 1988-09-13 Shell Offshore Inc. Method and appparatus for reduction of well assembly time
CN2312321Y (en) * 1997-11-24 1999-03-31 新疆石油管理局采油工艺研究院 Dual strilling well head equipment
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CN108049836A (en) * 2017-12-28 2018-05-18 中国石油天然气集团公司 Replacement SAGD wellhead assemblies and its replacing options with pressure
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CA2335677A1 (en) * 2001-02-08 2002-08-12 L. Murray Dallas Seal assembly for dual string coil tubing injection and method of use
CN2688879Y (en) * 2004-03-20 2005-03-30 张学鲁 Top connector for double tube for filling and producing
CN2846718Y (en) * 2005-04-15 2006-12-13 鲍洪玉 High temperature high pressure double pipe pole wellhead device
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CN108049836A (en) * 2017-12-28 2018-05-18 中国石油天然气集团公司 Replacement SAGD wellhead assemblies and its replacing options with pressure
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111734338A (en) * 2020-06-30 2020-10-02 濮阳市海华石油机械有限公司 Oil pipe head and casing head device for petroleum development and using method thereof
CN111734338B (en) * 2020-06-30 2022-05-27 濮阳市海华石油机械有限公司 Oil pipe head and casing head device for petroleum development and using method thereof
CN111946289A (en) * 2020-09-08 2020-11-17 中国石油天然气股份有限公司 Multi-channel flow divider for cluster pipe wellhead
CN111946291A (en) * 2020-09-08 2020-11-17 中国石油天然气股份有限公司 Connecting device for inner channel of cluster pipe wellhead pipe cutting butt joint
CN111963094A (en) * 2020-09-08 2020-11-20 中国石油天然气股份有限公司 Cluster pipe two-gas co-production tubular column

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