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Subsea bop hydraulic fluid flow monitoring

A technology of hydraulic fluid and hydraulic flow, which is applied in wellbore/well components, sealing/package, earthwork drilling and production, etc. It can solve problems such as unavailable safety system transmission, system complexity, and difficulty in measuring fluids, and achieve improved analysis capacity, improved diagnostics, and safety

Active Publication Date: 2019-10-01
HYDRIL USA DISTRIBUTION LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the primary surface control system used to perform a function by supplying hydraulic pressure to subsea components may not accurately communicate the function performed to the backup safety system when the systems have a common flow meter
[0006] In known systems, measuring fluid to a specific load is difficult when the system has two or more independent control systems using a single hydraulic source
Adding additional flow and pressure gauges can complicate the system and introduce other pitfalls

Method used

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  • Subsea bop hydraulic fluid flow monitoring
  • Subsea bop hydraulic fluid flow monitoring
  • Subsea bop hydraulic fluid flow monitoring

Examples

Experimental program
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Embodiment Construction

[0030] The methods and systems described are used for components of subsea BOP systems and provide flow rates determined to reach Safety Integrity Level (SIL) rated loads when the Basic Process Control System (BPCS) can asynchronously switch loads on and off from the same hydraulic source or the capabilities of the BPCS function (function of interest). The systems and methods of the present disclosure eliminate flow noise from leaks in the system as well as flow noise caused by state switching and switching transients in the BPCS.

[0031] Another use of the methods and systems disclosed herein is in a BPCS such as a drilling control system where flow rates from various functions need to be measured while ignoring the flow of any leaks present in the system. The systems and methods are capable of extracting a functional signal from the underlying noise caused by leakage.

[0032] Additionally, more general uses of the methods disclosed herein include measuring flow from one c...

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Abstract

Disclosed herein are methods and systems for accurately measuring and monitoring the cumulative volume of hydraulic fluid in a blowout preventer (BOP) system (200), particularly for functions of interest. A method includes: initializing a state machine algorithm (600) responsive to a BOP function of interest being activated; measuring an initial hydraulic flow rate reference and an initial pressure reference to create a monitoring the aggregated hydraulic flow rate and pressure of the BOP system over time; applying the hydraulic impedance variable to exclude BOP system hydraulic flow irrelevant to the BOP function of interest; and applying the state machine algorithm (600) In response to the total accumulated volume of hydraulic fluid, it is determined when the BOP function of interest is complete.

Description

[0001] Related Application Cross Reference [0002] This application is a PCT application claiming priority to US Provisional Application No. 62 / 078,236, filed November 11, 2014, which is incorporated herein by reference in its entirety. U.S. Application No. 14 / 884,563 was filed October 15, 2015, and claims priority to U.S. Provisional Application No. 62 / 065,431, filed October 17, 2014, the entire disclosure of which is incorporated herein by reference. technical field [0003] The present disclosure relates generally to oil and gas equipment, and, more particularly, to methods of measuring flow to determine whether a hydraulic control is active to perform a particular function. Specifically, the present disclosure provides systems and methods for monitoring aggregated flow rate and pressure in a hydraulic control system for load-specific information of interest. Background technique [0004] A blowout preventer (BOP) system is a hydraulically controlled system used to pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/064E21B34/16
CPCE21B33/064E21B34/16
Inventor J.S.霍尔姆斯J.诺兰
Owner HYDRIL USA DISTRIBUTION LLC