Abstract: A removable injection valve insert assembly is disclosed for deploying in production tubing of a well casing. The production tubing includes a landing nipple with an inlet and a sliding side-door which covers and seals the inlet when in a closed position and uncovers the inlet when in an open position. The insert assembly controls the flow of flushing fluid that is injected into the inlet from an annular source between the casing and the production tubing. The valve directs the controlled flushing fluid to an injection line, which in turn injects the flushing fluid into the production stream of the well. Preferably, the injected flushing fluid is injected below the casing perforations. The insert assembly comprises a body having upper and lower ends, a first passage formed in the body for receiving the fluid from the inlet and a second passage in communication with the first passage for housing a flow control valve. The body also includes a by-pass passageway which allows production flow across the insert.
Type:
Grant
Filed:
March 5, 1996
Date of Patent:
February 17, 1998
Assignee:
Halliburton Energy Services, Inc.
Inventors:
Mark A. Schnatzmeyer, Charles R. Williams
Abstract: Disclosed is an improved apparatus and method for performing downhole operations to a subterranean formation while isolating the formation from the remainder of the well bore. The invention utilizes a tool assembly which initially sets a packer above the formation while allowing a downhole tool to extend through a passageway in the packer to perform operations such as perforating the formation. The assembly permits retrieval of the tools through the passageway in the packer while sealing off the formation from the remainder of the well.
Type:
Grant
Filed:
February 5, 1996
Date of Patent:
December 30, 1997
Assignee:
Halliburton Company
Inventors:
Dan Williamson, James A. Mills, John J. Ryan, III