Thermal-operated valve for control of coolant rate of flow in oil wells
First Claim
1. A thermally operated valve for automatic control of the rate of flow of a fluid coolant for hot gases produced by underground gasification of solid fuel deposits or by in situ combustion in oil wells, incorporating a temperature-sensitive element comprising a metal tube several meters long to be incorporated in a pipe for supplying coolant to the well, and a rod of a metal having a low coefficient of expansion coaxial with the pipe, the upper end of which rod is attached to the upper part of the metal tube and the lower end of which rod is connected to a valve member by a connecting element having adjustable clearance or play, the metal tube is lined with a layer of impermeable material having a low coefficient of thermal conductivity.
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Accused Products
Abstract
A thermally operated valve for automatic control of the rate of flow of a fluid coolant for hot gases produced by underground gasification of solid fuel deposits or by in situ combustion in oil wells, incorporating a temperature-sensitive element comprising a metal tube several meters long to be incorporated in a pipe for supplying coolant to the well, and a rod of a metal having a low coefficient of expansion coaxial with the pipe, the upper end of which rod is attached to the upper part of the metal tube and the lower end of which rod is flexibly connected to a valve member by a connecting element having adjustable clearance or play.
50 Citations
5 Claims
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1. A thermally operated valve for automatic control of the rate of flow of a fluid coolant for hot gases produced by underground gasification of solid fuel deposits or by in situ combustion in oil wells, incorporating a temperature-sensitive element comprising a metal tube several meters long to be incorporated in a pipe for supplying coolant to the well, and a rod of a metal having a low coefficient of expansion coaxial with the pipe, the upper end of which rod is attached to the upper part of the metal tube and the lower end of which rod is connected to a valve member by a connecting element having adjustable clearance or play, the metal tube is lined with a layer of impermeable material having a low coefficient of thermal conductivity.
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2. A thermally operated valve for automatic control of the rate of flow of a fluid coolant for hot gases produced by underground gasification of solid fuel deposits or by in situ combustion in oil wells, incorporating a temperature-sensitive element comprising a metal tube several meters long to be incorporated in a pipe for supplying coolant to the well, and a rod of a metal having a low coefficient of expansion coaxial with the pipe, the upper end of which rod is attached to the upper part of the metal tube and the lower end of which rod is connected to a valve member by a connecting element having adjustable clearance or play, the metal rod is made of nickel steel of the "Invar" type.
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3. A thermally operated valve for automatic control of the rate of flow of a liquid for cooling the gases obtained by underground gasification of solid fuel deposits or by combustion in situ of petroleum deposits incorporating a temperature-sensitive element formed of a metal tube interposed in a conduit and by a metal rod having a low coefficient of expansion, mounted coaxially in said tube and connected on the one hand to one end of said tube and on the other hand to the valve, wherein
the metal tube is of great length extending over several meters, the upper end of the metal rod is connected to the upper end of the tube, and connecting means which has adjustable play for flexibly connecting the lower end of the metal rod to the valve.
- 4. A thermally operated valve for automatic control of the rate of flow of a fluid coolant for hot gases produced by underground gasification of solid fuel deposits or by in situ combustion in oil wells, incorporating a temperature-sensitive element comprising a metal tube several meters long to be incorporated in a pipe for supplying coolant to the well, and a rod of a metal having a low coefficient of expansion coaxial with the pipe, the upper end of which rod is attached to the upper part of the metal tube and the lower end of which rod is connected to a valve member by a connecting element having adjustable clearance or play, the connecting element between the valve member and the rod is a yoke-shaped element attached by screw threads to the lower end of the rod and held in place by a lock nut.
Specification