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Automatic throttling manifold for pressure control drilling

An automatic throttling and pressure-management drilling technology, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc., can solve the problems of difficult to achieve control accuracy and high cost, and achieve the effect of improving the use effect

Inactive Publication Date: 2015-01-28
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

[0003] In order to solve the problems in the existing automatic choke manifold technology that the cost is high and the control accuracy is difficult to meet the technical requirements of MPD, the invention further provides an automatic choke manifold for MPD

Method used

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  • Automatic throttling manifold for pressure control drilling
  • Automatic throttling manifold for pressure control drilling

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Embodiment Construction

[0010] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0011] This specific embodiment provides a managed pressure drilling automatic choke manifold, such as figure 1 and figure 2 As shown, it includes inlet throttle valve 2, first four-way valve 5, first three-way valve 6, one-way valve 11, second four-way valve 12, hydraulic gate valve 13, second three-way valve 14, First parallel gate valve 18, filter four-way valve 19, third four-way valve 22, data nipple 23, fourth four-way valve 24, second parallel gate valve 2...

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Abstract

The invention provides an automatic throttling manifold for pressure control drilling. A first four-way valve is connected with a unidirectional valve; the unidirectional valve is connected with a first three-way valve; the first four-way valve is connected with a second four-way valve; the second four-way valve is connected with a hydraulic gate valve; the hydraulic gate valve is connected with a second three-way valve; the second three-way valve is connected with an inlet throttling valve; an opening of the second three-way valve is connected with a filtration four-way valve; the filtration four-way valve is connected with a first parallel gate valve; the first parallel gate valve is connected with a third four-way valve; the third four-way valve is connected with a fourth four-way valve through a data short joint; the fourth four-way valve is connected with a second parallel gate valve; the second parallel gate valve is connected with a flowmeter through a flowmeter inlet elbow; the flowmeter is connected with a straight through type needle valve through flow and an outlet elbow; the straight through type needle valve is connected with a third parallel gate valve; the third parallel gate valve is connected with a fifth four-way valve; the fourth four-way valve is connected with the fifth four-way valve through a buffering pipe; and the fifth four-way valve is connected with a two-way valve.

Description

technical field [0001] The invention relates to an automatic choke manifold for pressure-controlled drilling, belonging to the technical field of underbalanced drilling. Background technique [0002] The automatic choke manifold is one of the core equipments for the realization of managed pressure drilling technology, and it can be used in conjunction with other drilling tools to precisely control the annular pressure in the wellbore. However, the existing equipment control structure is too complicated, not only the cost is high, but also the pressure control is not precise enough, so it is difficult to meet the technical requirements of MPD. Contents of the invention [0003] The present invention provides an automatic choke manifold for MPD to solve the problems of high cost and difficulty in meeting the technical requirements of MPD in the existing automatic choke manifold technology. For this reason, the present invention provides following technical scheme: [0004]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/03
Inventor 董玉辉白晓捷马晓伟崔树建窦金永田玉栋王振雷王书庆杨毅
Owner BC P INC CHINA NAT PETROLEUM CORP
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