Method and system for controlling high pressure flow, such as in containment of oil and gas well fires
This patent describes a system for controlling the high pressure flow of fluid materials through a pipeline. It comprises means for encapsulating a section of the pipeline through which the fluid materials are flowing; first piercing means mounted on the lower end of the encapsulating means for piercing the encapsulated section of pipe; bleed-off means attached to the first piercing means for diverting at least some of the flow from the pipe to a remote location to reduce the pressure in the pipe; second piercing means mounted on the encapsulating means above the first piercing means for piercing the encapsulated section of pipe; and first sealing means removably attached to the second piercing means for selectively sealing off the lower end of the encapsulated section of pipe. This patent describes a method for controlling flow through a pipe, particularly for containing oil and gas well fires. It comprises: installing an enclosure vessel around the section of pipe; mounting a first piercing unit having a bleed-off assembly onto the enclosure vessel; installing a diversion pipe connected to the bleed-off assembly to a remote holding site; piercing the section of pipe with the first piercing unit; bleeding off maximum pressure from the section of pipe by diverting the flow from the pipe through the diversion pipe to the remote holding site; installing a first drilling unit on the vessel above the bleed-off assembly; mounting a first plugging unit on the first drilling unit; drilling through the section of pipe with the first drilling unit; and plugging the section of pipe with the first plugging unit.
- Assignee:
- NOV; NOV-93-005160; EDB-93-035983
- Patent Number(s):
- US 5156212; A
- Application Number:
- PPN: US 7-703453
- OSTI ID:
- 6780220
- Resource Relation:
- Patent File Date: 21 May 1991
- Country of Publication:
- United States
- Language:
- English
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NATURAL GAS WELLS
CONTROL SYSTEMS
FIRES
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PIPELINES
FLUID FLOW
HIGH PRESSURE
STANDARDS
WELLS
022000* - Petroleum- Transport
Handling
& Storage
032000 - Natural Gas- Transport
Handling
& Storage
020500 - Petroleum- Products & By-Products
030500 - Natural Gas- Health & Safety