Multi-level fine choke manifold and automatic control system

A technology of automatic control system and choke manifold, applied in drilling automatic control system, drilling equipment, wellbore/well components, etc., can solve choke valve erosion, choke valve failure, narrow linear adjustment area, etc. question
CN101694152AInactive Publication Date: 2010-04-14CHINA UNIV OF PETROLEUM (BEIJING) +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (BEIJING)
Publication Date
2010-04-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

A multi-level fine choke manifold and an automatic control system belong to the field of fine automatic control of oil gas oil exploration technology. Aiming at the requirement of fine control on wellhead pressure, a plurality of plate valves and throttle valves are connected in parallel to form a chock manifold system. The automatic control system opens and closes different plate valves and continuously adjusts the opening of the throttle valves to achieve the aim of micro-adjustment of the wellhead back pressure under different pressure levels. The automatic control system can realize opening and closing of valves and non-disturbance switching in the process of opening adjustment so as to lead the adjustment process of the wellhead back pressure to be fast and stable, and guarantee the safe and smooth construction of fine pressure-controlled well drilling.
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Description

technical field

[0001] The invention relates to the automatic control of oil and gas exploration and development, in particular to a fine automatic control system for drilling throttling pressure of oil and gas wells. Background technique

[0002] In oil and gas exploration and development projects, with the expansion of oil and gas exploration fields and the advancement of technology, the requirements for the control technology of wellhead back pressure in the process of oil and gas drilling have been greatly improved. On the one hand, the near-balanced or under-balanced drilling method is used to better protect oil and gas layers, effectively reduce the damage of drilling fluid to oil and gas layers, reduce or overcome the impact of pressure difference on drilling speed, and effectively reduce the comprehensive cost of oil and gas well development , greatly increase the ROP and improve the success rate of oil and gas well drilling; on the other hand, when drilling a format...

Claims

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