System for automatic injection of coolant into thermal recovery wells

Patent · Tue Mar 25 04:00:00 EST 1969

OSTI ID:5692962

Hollabaugh, G R

A system for the automatic injection of a coolant into a thermal recovery well to control downhole temperatures is described. A tubing string provides for the withdrawal of products of the thermal recovery procedure from the well. A conduit mounted on the tubing string is filled with a heat expansible fluid. The change in pressure of the fluid, by its expansion at certain temperatures, in this conduit is a signal to bring introduction of coolant into the well. For example, a pressure relief valve may be connected to the conduit and it remains closed when the temperature within the well is less than a specified temperature. The valve opens at an increased pressure when the fluid within the conduit expands to reflect temperatures greater than the specified temperature. The open valve generates a signal as a change in pressure by venting fluid from the conduit into the well. Flow control means, upon occurrence of this signal, introduce a coolant into the well to control downhole temperatures. (10 claims)

• Assignee: Mobil Oil Corp.
• Patent Number(s): US 3434534
• OSTI ID: 5692962
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
AUTOMATION
CONTROL
CONTROL EQUIPMENT
COOLANTS
DESIGN
ENERGY SOURCES
ENGINEERING
ENHANCED RECOVERY
EQUIPMENT
FLOW REGULATORS
FOSSIL FUELS
FUELS
INJECTION
INTAKE
OIL WELLS
OPERATION
PETROLEUM
RECOVERY
RELIEF VALVES
REMOTE SENSING
RESERVOIR TEMPERATURE
SAFETY ENGINEERING
TEMPERATURE CONTROL
THERMAL RECOVERY
VALVES
WELL TEMPERATURE
WELLS