The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 1983
Filed:
Oct. 07, 1980
Burchus Q Barrington, Duncan, OK (US);
Wilbur P Clayton, Aberdeen, GB;
Gerald D Jackson, Marlow, OK (US);
Halliburton Company, Duncan, OK (US);
Abstract
A screw operated emergency release and safety valve includes a valve housing having a flow passage therethrough and adapted to be connected to a lower portion of a tubing string. A full opening ball valve is disposed in the valve housing for opening and closing the flow passage. A stinger assembly is adapted to be connected to an upper portion of the tubing string, and includes a stinger mandrel releasably telescopingly received within the valve housing. An actuating mandrel assembly is operably associated with the stinger mandrel and connected to the ball valve and is movable between first and second positions for opening and closing the ball valve in response to manipulation of the upper portion of the tubing string. A threaded connecting collar releasably interconnects the valve housing and the stinger assembly. The valve housing, ball valve, stinger assembly, actuating mandrel assembly and threaded connecting collar are so arranged and constructed that, when disconnecting the threaded connecting collar, a first predetermined number of rotations of the stinger assembly in a right-hand direction relative to the valve housing causes the actuating mandrel assembly to move to its said second position thereby closing the ball valve, and an additional predetermined number of rotations of the stinger assembly in the right-hand direction relative to the valve housing is necessary to release the stinger assembly from the valve housing. Methods of use are also disclosed.