Unlock instant, AI-driven research and patent intelligence for your innovation.

Wellhead hips with automatic testing and self-diagnostics

An integrity protection, inlet technology, applied in the direction of engine components, wellbore/well components, wellbore/well valve devices, etc., can solve problems that do not take into account process dynamics and valve travel time changes

Inactive Publication Date: 2014-01-01
SAUDI ARABIAN OIL CO
View PDF13 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this procedure does not take into account the fact that process dynamics and valve travel times can change over time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wellhead hips with automatic testing and self-diagnostics
  • Wellhead hips with automatic testing and self-diagnostics
  • Wellhead hips with automatic testing and self-diagnostics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] refer to figure 1 , a High Integrity Protection System (HIPS) 10 is installed in the pipeline system near the wellhead to transport pressurized fluid product (eg, oil or gas) from the wellhead 102 to a remote host location via pipeline 104 . The HIPS has an inlet 1 connected to wellhead piping 102 and an outlet 2 connected to piping 104 through which liquid product enters and exits the HIPS 10 . The HIPS is preferably skid-mounted to be transported to the wellhead location, and the HIPS is provided with suitable flanges and adapters for connection to the inlet and outlet of oilfield pipelines as required.

[0045] Two sets of surface safety valves (SSVs) 11, 12 and 13, 14 are in fluid communication with inlet 1 and outlet 2 so that they can operate as flow lines for fluid product. The SSVs identified and referred to as SSV-1 and SSV-2 each have two serially connected SSVs 11-12 and 13-14, respectively. In the event that no power is supplied to the SSV, the SSV is auto...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method for diagnostics of a high integrity protection system (HIPS) for protection of a pipeline downstream of a wellhead includes: monitoring for initiation of an automatic trip or manual safety shutdown or full shut-off test; determining the process safety time (PST) that elapses between the time at which the upstream pressure reached the trip setpoint and the time at which the upstream pressure reaches the maximum allowable piping pressure (MAPP) of the downstream pipeline; and verifying that the safety critical isolation valves stroked to the fully closed position within ½ PST and that the downstream pressure did not exceed the MAPP. If the verification is successful, no action is required, whereas if the verification shows that either of those parameters are not met, then the HIPS signals an alarm to operators, and in the case of a manual safety shutdown or full shut-off test, resets the pressure trip setpoint to a lower level.

Description

[0001] related application [0002] This application is related to, and claims the benefit of, U.S. Provisional Patent Application Serial No. 61 / 434,051, filed January 19, 2011, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to a method and apparatus for operating and testing a High Integrity Protection System (HIPS) connected to a wellhead piping system. Background technique [0004] In the oil and gas industry, wellhead topside pressures can exceed the maximum allowable pressure in the production fluid piping downstream of the wellhead due to reduced pipe wall thickness or because cost constraints prevent the installation of fully rated pipe. Thus, there is a need to protect such pipelines from excessive pressure, which could cause the pipeline to rupture, causing environmental pollution and expensive to replace. One traditional system used to protect pipelines from excessive pressure is the High I...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F15/00
CPCF16K17/02E21B34/06E21B43/00
Inventor P·S·弗兰德尔斯
Owner SAUDI ARABIAN OIL CO