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Electric throttling pressure control system for fine pressure control well drilling

A technology of pressure controlled drilling and electric throttling, which is applied to the automatic control system of drilling, drilling equipment, earthwork drilling and production, etc. It can solve the problems of difficult to achieve precise control of small displacement of throttle valve, leakage of hydraulic components and pipelines, Complicated hydraulic pipelines and other issues, to achieve the effect of simple structure, high reliability, and convenient maintenance

Inactive Publication Date: 2018-03-06
王东玉
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) The hydraulic pipeline is complex, and leakage between hydraulic components and pipelines is prone to occur
[0005] 2) Hydraulic control is not suitable for complex calculations such as signal amplification, memory and logic judgment
[0006] 3) The hydraulic system is affected by the elasticity of the hydraulic oil itself and the external temperature, so it is difficult to achieve precise control of the small displacement of the throttle valve (0~50mm)

Method used

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  • Electric throttling pressure control system for fine pressure control well drilling
  • Electric throttling pressure control system for fine pressure control well drilling
  • Electric throttling pressure control system for fine pressure control well drilling

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with drawings and embodiments.

[0017] Such as figure 1 , The control system is divided into a sensor module, a PLC control module, an electric actuator control module, and a display and parameter input module.

[0018] The real-time collection of key parameters is one of the key issues of the choke pressure control system. According to the needs of the fine MPD process, the process parameters closely related to the system include the standpipe pressure, the separator outlet pressure, and the gas and liquid flow rate at the separator outlet. , Throttle valve opening, pump stroke, etc.

[0019] The method of measurement of the relevant parameters.

[0020] 1) Use a pressure sensor to convert the analog signals of standpipe pressure, casing pressure and separator pressure into 4~20mA current signals.

[0021] 2) Use gas flow sensor and liquid flow sensor to convert the gas and liquid flow signals at ...

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Abstract

An electric throttling pressure control system for precise managed pressure drilling, which is divided into a sensor module, a PLC control module, an electric actuator control module, and a display and parameter input module. The PLC control module of the control system is composed of PLC control circuit, expansion module (EMS231) and additional timers according to requirements. This kind of control system has working performances such as simple structure, high reliability, and convenient maintenance, and also improves work efficiency.

Description

Technical field [0001] The invention relates to an electric throttling pressure control system for precise pressure-management drilling, which is suitable for the mechanical field. Background technique [0002] Drilling in complex formations, due to the narrow pressure window between the fracture pressure (leakage pressure) and formation pore pressure (collapse pressure), complex situations such as overflow or lost circulation will occur using conventional drilling methods. Conventional near-equilibrium pressure drilling methods are no longer suitable for drilling in formations with narrow pressure windows. Preciese Managed Pressure Drilling Technology (Preciese Managed Pressure Drilling Technology) is a drilling technology developed for narrow pressure windows. [0003] The choke pressure control system is one of the key technologies of fine managed pressure drilling. It controls the wellhead pressure by controlling the opening of the choke valve, and finally achieves the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B21/08E21B44/00
CPCE21B21/08E21B44/00
Inventor 王东玉
Owner 王东玉