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Proportional electrohydraulic servo valve closed loop feedback control of pressure reducing and relieving hydraulic circuit

A hydraulic circuit and servo valve technology, applied in the field of BOP multiplexer control system, can solve problems such as instability

Inactive Publication Date: 2018-08-31
HYDRIL USA DISTRIBUTION LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, current BOP regulators exhibit instability and subsequent pressure spikes

Method used

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  • Proportional electrohydraulic servo valve closed loop feedback control of pressure reducing and relieving hydraulic circuit
  • Proportional electrohydraulic servo valve closed loop feedback control of pressure reducing and relieving hydraulic circuit
  • Proportional electrohydraulic servo valve closed loop feedback control of pressure reducing and relieving hydraulic circuit

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Embodiment Construction

[0015] The specification and appended claims, including the Summary, Drawings, and Detailed Description, refer to particular features (including process or method steps) of the disclosure. Those skilled in the art understand that the present invention includes all possible combinations and uses of the specific features described in this specification. Those skilled in the art understand that the present disclosure is not limited to or by the description of the embodiments given in the specification.

[0016] Those skilled in the art will also understand that the terminology used to describe particular embodiments does not limit the scope or breadth of the present disclosure. In interpreting the specification and appended claims, all terms should be interpreted in the broadest possible manner consistent with the context of each term. Unless otherwise defined, all technical and scientific terms used in this specification and appended claims have the same meaning as commonly und...

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Abstract

Systems, devices and methods for regulating pressure in a blowout preventer (BOP) of a subsea well assembly. A closed loop regulator (CLR) that combines the functions of a pressure relieving valve anda pressure reducing valve into one body to control the pressure of a hydraulic circuit or a BOP mux control pod. A closed loop servo valve controlled proportional electrohydraulic reducing valve is used to allow continual variation of the pressure set point for the downstream circuit. If the downstream pressure exceeds the set point by a predetermined amount, the pressure relieving valve vents the pressure to the reservoir or atmosphere.

Description

Background technique [0001] The field of the invention relates generally to blowout preventer (BOP) equipment for use in oil and gas production, and in particular, to BOP multiplexer (MUX) control systems. [0002] describe [0003] BOP systems are hydraulic systems used to prevent blowouts in subsea oil and gas wells. BOP equipment typically includes a set of two or more redundant control systems with separate hydraulic pathways for operating designated BOP functions. Redundant control systems are commonly referred to as blue and yellow control boxes. In known systems, communication and power cables send information and power to actuators with specific addresses. The actuator in turn moves the hydraulic valve, opening fluid to a series of other valves / pipes to control a portion of the BOP. However, current BOP regulators exhibit instability and subsequent pressure spikes. Contents of the invention [0004] As disclosed, the present invention includes systems, devices ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/16E21B33/035
CPCE21B33/0355E21B34/16E21B33/063E21B33/064F16K31/42G05B19/416G05B2219/37371E21B33/035
Inventor C.L.卡利内奇
Owner HYDRIL USA DISTRIBUTION LLC