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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

Active Publication Date: 2010-02-10
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, the above operations have to be repeated many times for each layer of casing to be installed until the final installation of the tubing head, which is cumbersome and takes a long time to operate on the platform
Especially in offshore operations, every minute of time wasted adds a lot of cost
On the other hand, conventional oil production wellheads are bulky and take up more space on the platform, which increases the construction cost of the platform

Method used

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  • Integral type level oil extraction wellhead equipment
  • Integral type level oil extraction wellhead equipment

Examples

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Effect test

Embodiment 1

[0021] Embodiment 1: Taking an integral horizontal oil recovery wellhead device as an example, the invention is further described in detail.

[0022] refer to figure 1 . The integral horizontal oil production wellhead device of the present invention consists of a wellhead body 1, a tubing hanger 2, a gas-hydraulic safety valve 3, a throttle valve 4, a flat valve 5, a WD casing hanger slip shell 8, and an anti-slip 9 , positive slip 10, sealing baffle 11, double C-shaped sealing ring 12, BT sealing ring 13, plug 14, casing hanger 15, 19, V-shaped metal seal 16, 18, 22, bimetallic hollow O-shaped Sealing ring 20, top wire assembly 21, steel ring 23, different diameter flange 24, cleaning wax valve 25, christmas tree cap 26 are formed.

[0023] The wellhead body 1 is cylindrical and has an upper cavity, a middle cavity and a lower cavity in the wellhead body 1 . The upper cavity and the middle cavity are cylindrical cavities, and the lower ends of the upper cavity and the midd...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/03
Inventor 侯福祥李青松于永亮曹川纪友哲吴千里
Owner BC P INC CHINA NAT PETROLEUM CORP
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