Integral type level oil extraction wellhead equipment

A wellhead device and integrated technology, applied in the field of integrated horizontal oil production wellhead devices, can solve the problems of bulky, increased platform construction costs, cumbersome and other problems, and achieve the effect of simplifying workover operations and saving installation and workover time
CN101644149AActive Publication Date: 2010-02-10BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BC P INC CHINA NAT PETROLEUM CORP
Publication Date
2010-02-10

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Abstract

The invention relates to integral type level oil extraction wellhead equipment, applied to ocean platform oil extraction. An upper cavity, a middle cavity and a lower cavity are arranged in a wellheadbody. The lower end of the upper cavity and the lower end of the middle cavity are respectively provided with a conical surface circular bead. An oil pipe hanger is arranged in the upper cavity. Thelower end of the oil pipe hanger is connected with screw threads used for connecting the oil pipe. The oil pipe hanger has an oil outlet channel. A pneumatic-hydraulic safety valve and a throttle valve are fixed on the outer wall of the wellhead body. A reduced flange, a paraffin removal valve and a tree cap are arranged on the upper end of the wellhead body. A completion sleeve hanger and a middle sleeve hanger are arranged in the middle cavity of the wellhead body. A WD sleeve hanger is arranged in the lower cavity of the wellhead body. The invention has the effects that: an integral hangingstructure with three hangers lowers the height of the wellhead and simplifies the installation procedure. A Christmas tree and relevant associated lines do not need to be removed during the subsequent workover job, thereby simplifying workover operation, saving disassembly and assembly time and simplifying the later workover operation.
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Description

technical field

[0001] The invention relates to an oil production wellhead device, in particular to an integral horizontal oil production wellhead device for an offshore oil production platform. Background technique

[0002] At present, the oil production wellhead devices used in offshore oil production platforms are mainly imported from abroad, which has the problems of cumbersome installation and high cost. Conventional production wellhead devices are connected and combined by casing head, casing spool, tubing head and Christmas tree. During the installation process, a series of procedures such as removing the wellhead blowout preventer, installing the cross, installing the blowout preventer, and pressure testing are required. In particular, the above operations must be repeated many times from each layer of casing hanging to the final installation of the tubing head, which is cumbersome and takes a long time to operate on the platform. Especially in offshore operations,...

Claims

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