Automic control system for throttle well killing

An automatic control system, choke and kill technology, applied in the direction of fluid pressure control, control/regulation system, non-electric variable control, etc., can solve problems such as downhole pressure fluctuations, affecting the success rate of well killing, and bottom hole pressure reduction , to achieve the effect of improving the success rate of well killing and avoiding downhole pressure fluctuations

Inactive Publication Date: 2004-10-20
雷宗明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the downhole pressure fluctuations caused by manual operation of the choke valve in the existing choke manifold, resulting in a decrease in bottomhole pressure, secondary overflow, and affecting the success rate of well killing, the present invention provides an automatic control system for choke well killing system

Method used

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  • Automic control system for throttle well killing
  • Automic control system for throttle well killing
  • Automic control system for throttle well killing

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Embodiment Construction

[0012] In Fig. 1, the killing fluid (3) enters the annulus (6) through the drill string (4) and returns to the mud pool (19) through the choke manifold (7) in the borehole (5) to form a circulation. The vertical pressure sensor (1) on the drill string is connected with the vertical pressure gauge (8) on the throttle control box (12) and the computer (18), and the casing pressure sensor (2) is connected with the casing pressure gauge ( 9) Connected to the computer, the mud tank liquid level sensor (20) is connected to the computer, the valve position sensor (13) is connected to the computer and the valve position opening meter (10) on the throttle control box, in the throttle control box, The manual three-position four-way valve (11) is connected in parallel with the electric three-position four-way valve (17), the oil circuit output end is connected with the hydraulic throttle valve (14), and the control end of the electric three-position four-way valve is connected with the co...

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PUM

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Abstract

An automatic control system for throttle well killing fracture for automatically controlling the throttle circulation pressure is composed of vertical-fracture sensor, sleeve-fracture sensor, well-fracture liquid, drilling column, well, ring space, throttle pipes, vertical-fracture meter, sleeve-fracture meter, valve openness meter, manual three-position four-way valve, electric three-position four-way valve, throttle control box, valve sensor, hydraulic throttle valve, manual throttle valve, spraying pipeline, computer, sludge pool and level sensor for sludge pool. Its control method is also disclosed.

Description

Technical field [0001] The invention relates to an automatic control device for throttling circulation and killing wells after overflow occurs during oil and gas drilling. The throttling and killing automatic control system can automatically control the throttling circulation pressure according to the well construction design. Background technique [0002] At present, in the process of well killing construction, the means of controlling formation pressure and preventing secondary overflow is to control the formation pressure by the wellhead back pressure generated by the choke valve on the choke manifold on the ground. There are two kinds of operation process: one is to manually control the throttle valve; the other is to control the hydraulic throttle valve through the hydraulic control device on the throttle control box. The essence of the two methods is the same, that is, to manually control the opening of the throttle valve, adjust the back pressure of the wellhead, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/12G05D16/00
Inventor 雷宗明
Owner 雷宗明
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