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Combined pressure well mouth device for under-pressure fracture

A wellhead device and fracturing technology, applied in the direction of wellbore/well valve device, wellbore/well components, production fluid, etc., to achieve the effects of ensuring well control safety, reducing construction safety risks, and convenient operation

Inactive Publication Date: 2019-11-19
DAQING OILFIELD CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a combined pressure wellhead device for hot fracturing, which solves the problem that the existing hot fracturing construction either requires secondary disassembly and installation of hot operating equipment, or erects high-pressure straight pipes and other accessories at high altitudes. question

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  • Combined pressure well mouth device for under-pressure fracture
  • Combined pressure well mouth device for under-pressure fracture
  • Combined pressure well mouth device for under-pressure fracture

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Embodiment Construction

[0051] The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. However, the present invention can be fully understood by those skilled in the art about the parts that are not described in detail.

[0052] In addition, those of ordinary skill in the art should understand that the provided drawings are only to illustrate the objects, features and advantages of the present invention, and the drawings are not actually drawn to scale.

[0053] At the same time, unless the context clearly requires, the words "include", "include" and other similar words in the entire specification and claims should be interpreted as an inclusive meaning rather than an exclusive or exhaustive meaning; that is, "include but not limited to the meaning of ".

[0054] figure 1 It is a structural schematic diag...

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Abstract

The invention discloses a combined pressure well mouth device for under-pressure fracture. The combined pressure well mouth device comprises a plate valve (1), an injection head (2), a fracture controller (3) and an oil pipe hanger (4). The upper end of the plate valve (1) is connected with an under-pressure operation machine. The lower end of the plate valve (1) is connected with the injection head. The plate valve is used for isolating a high pressure area from the under-pressure operation machine during fracture construction. The lower end of the injection head (2) is connected with the fracture controller, and the injection head is used for being connected with a ground fracture pipeline. A well mouth flange is connected to the lower portion of the fracture controller (3), and the fracture controller is used for clamping the oil pipe hanger (4), for isolating an oil jacket annulus and for bearing gravity of a pipe column, pressure of a hydrostatic column and the load produced by liquid high pressure during fracture. The fracture oil pipe hanger (4) is used for being connected with the fracture pipe column and a post-pressure movable pipe column. The problems that in existing under-pressure fracture construction, under-pressure operation equipment needs secondary disassembly and assembly, or a high pressure straight pipe and other accessories need to be erected overhead aresolved.

Description

technical field [0001] The invention relates to the technical field of oil field fracturing construction, in particular to a wellhead equipment used for high-pressure well fracturing. Background technique [0002] At present, two methods are commonly used in the integrated construction of hot fracturing. One is to use the snubbing equipment to lift out the original well pipe string and lower the fracturing string before the fracturing operation, remove the snubbing equipment for fracturing, and reinstall the snubbing equipment at the wellhead after the fracturing is completed. The fracturing string is pulled out and the completion string is run in to complete the entire construction; the second is to carry out fracturing construction without dismantling the snubbing equipment, and use the snubbing equipment to pull out the original well string and run the fracturing string in the belt. Install high-pressure fittings and high-pressure straight pipes on the top of the pressur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/04E21B34/02E21B43/26
CPCE21B33/04E21B34/02E21B43/26
Inventor 王秀臣王雷邱振宇张维锋兰乘宇孟繁志侯景龙
Owner DAQING OILFIELD CO LTD
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