Well pressure control system

a control system and pressure control technology, applied in the direction of survey, drilling pipe, borehole/well accessories, etc., can solve the problems of unbalanced conditions, undesirable variations in drilling fluid pressure, and difficulty for human operators to compensate for dynamic flow variations
US20050092523A1Inactive Publication Date: 2005-05-05EXPRO AMERICAS
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
EXPRO AMERICAS
Publication Date
2005-05-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention contemplates a choke control system that provides for local and off-site monitoring and control of the annulus flow pressure of a well. The choke control system includes a choke manifold connected to at least one choke and its associated actuator; a variety of instrumental drilling sensors, pump stroke counter switches, and choke position indicators; a local choke and hydraulic pressure control console; and a programmable controller in communication with the local choke and hydraulic pressure control console. The programmable controller handles the logical operations of the choke control system, including processing instrument measurements and operator input data to produce control signals for operating the choke, the choke actuator and the various valves associated with the choke manifold. The programmable controller is typically either an electronic digital computer and / or a programmable logic controller (PLC). The present invention further contemplates the two-way communication between the choke control system and the Internet via a satellite linkage.
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Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to pending U.S. Patent Application Serial No. 60 / 515,875 (Attorney Docket Number PC-P007V, filed Oct. 30, 2003 by John McCaskill, et al. and entitled “Hydraulic Choke Control System for Underbalanced Drilling.”FIELD OF THE INVENTION

[0002] The present invention relates to an apparatus for maintaining well pressure control in various situations such as underbalanced, overbalanced, or other managed pressure drilling of petroleum wells, or the control of petroleum wells that are out of control or likely to become out of control. More particularly, the present invention relates to the operation of hydraulic choke valves for the maintenance of a constant drilling fluid pressure on the downhole formation face despite fluctuations arising due to mud pump speed changes or other causes. DESCRIPTION OF THE RELATED ART

[0003] Hydraulic choke devices are commonly used in the oilfield when drilling wells for oil or n...

Claims

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