Downhole relief valve

Patent · Tue Mar 18 04:00:00 EST 1986

OSTI ID:5649600

Slaughter, W B; Haynie, H C

A well apparatus is described adapted for connection in series with a pipe string, the pipe string extending into a producing well and forming a casing annulus with the casing and having a flow passage therethrough for the flow of hydrocarbons through the pipe string to the surface. The apparatus consists of: a tubular member having connection means at each end for connection in series with the pipe string, the member having an outer barrel and an inner mandrel forming a chamber therebetween and having fluid communication means providing fluid communication through the barrel and mandrel and between the casing annulus and the flow passage; the inner mandrel having an internal flow bore having a common inner diameter with the flow passage through the pipe string and being coaxial with the flow passage so as to become a part of the flow passage; the barrel having an outer surface exposed to the well fluids in the casing annulus; the chamber circumscribing the flow passage for the hydrocarbons; barrier means for closing and opening the fluid communication means; the barrier means responsive to an increase in the pressure in the casing annulus for opening the fluid communication means and allowing well fluids from the casing annulus to flow through the barrel and mandrel and into the flow passage to control the well.

• Assignee: S and B Engineers, Houston, TX
• Patent Number(s): US 4576235
• OSTI ID: 5649600
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CONTROL EQUIPMENT
DRILL BITS
DRILL PIPES
DRILLING EQUIPMENT
DRILLING FLUIDS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUID MECHANICS
FLUIDS
HYDRAULICS
HYDROCARBONS
MECHANICS
OIL WELLS
ORGANIC COMPOUNDS
PACKINGS
PIPES
PRESSURE EFFECTS
RELIEF VALVES
RESERVOIR PRESSURE
VALVES
WELL CASINGS
WELL PRESSURE
WELLS