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Drexel Oil Field Services, Inc. Patents
Drexel Oil Field Services, Inc.
Conroe, TX
No. of patents:

Patent Number Title Of Patent Date Issued
5590867 Blowout preventer for coiled tubing January 7, 1997
The present invention provides a blowout preventer in which a first set of hydraulic ports communicate with either side of a first piston coupled to a first piston rod, a second set of hydraulic ports communicate with either side of a second piston coupled to a second piston rod, and the
5566753 Stripper/packer October 22, 1996
A stripper/packer for use in a stack at a well head provides horizontal actuation and side access. This configuration enables maintenance of the packer in place. It also provides for the retraction of the packer to a diameter greater than the inside diameter of the packer to permit the
5490598 Screen for vibrating separator February 13, 1996
A substantially planar screen for a solid particle separator is formed from one or more layers of mesh. The one or more layers of mesh are formed into a series of ridges separated by channels within the plane of the screen. The wire mesh is bonded to a rigid or semi-rigid panel having a
5361832 Annular packer and insert November 8, 1994
An annular packer (P) with an axial bore (21) includes an elastomer body (23) with inserts (22) partially embedded therein and spaced circumferentially about the axial bore (21). The inserts (22) each support an element (24') embedded in the elastomer body (23) which move into the ax
4943031 Blowout preventer July 24, 1990
A blowout preventer having a housing with a bore therethrough and chambers which intersect with rams reciprocable within the chambers between a first position for opening the bore and a second position for closing the bore to divide the bore into zones above and below the rams includes a

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