| Patent Number |
Title Of Patent |
Date Issued |
| RE36121 |
Plug valve |
March 2, 1999 |
| Disclosed is a plug valve adapted to be placed in a chamber or vessel containing fluidized particles to control flow of the fluidized particles between the chamber or vessel and the open end of a conduit which has a contained purging system in a sealed space between the valve stem and |
| 5540253 |
Plug valve |
July 30, 1996 |
| Disclosed is a plug valve adapted to be placed in a chamber or vessel containing fluidized particles to control flow of the fluidized particles between the chamber or vessel and the open end of a conduit which has a contained purging system in a sealed space between the valve stem and |
| 5350560 |
Wear resistant alloy |
September 27, 1994 |
| Disclosed are iron based, austenitic alloys of substantially reduced cobalt content compared to current cobalt based alloys, such as Stellite 1 and 6, which are substantially less expensive than current cobalt based alloys, which are machinable using standard machine processes and proced |
| 5303742 |
Line blind assembly having interchangeable DISC |
April 19, 1994 |
| A line blind assembly having a pair of tubular members adapted to be connected in a flowline and connected to one another by bolts having nuts on their ends to permit sealing faces on the inner ends of the tubular members to be tightly engaged with sealing faces on the opposite sides of |
| 5303740 |
Line blind assembly having disc and spacer ring selectively disposable between ends of tubular m |
April 19, 1994 |
| There is disclosed a line blind assembly having a pair of tubular members adapted to be connected in a flowline and connected to one another by bolts having nuts on their ends to permit sealing faces on the inner ends of the tubular members to be tightly engaged with sealing faces on the |
| 5269493 |
Butterfly valve |
December 14, 1993 |
| There is disclosed a butterfly valve having a body forming a continuation of the flowway in which it is installed, bearing housings mounted on the body to connect with side openings from the flowway, a stem rotatable in the bearing housings and extending into the flowway, and a disc rota |
| 5062445 |
Water cooled gate valve |
November 5, 1991 |
| There is disclosed a gate valve wherein each of the gate, a plate having an orifice over which the gate is movable to control flow through the valve, and rails for guidably receiving the parallel opposite side edges of the gate as it is so moved is cooled by water circulating through a p |
| 5029608 |
Diverter valve |
July 9, 1991 |
| There is disclosed a diverter valve having a gate for closing one or the other side-by-side seats aligned with outlets from a valve body wherein the body is made of carbon steel or other relatively low heat resistant but inexpensive metal, and the seats and other internal parts are made |
| 4899899 |
Pressure vessel |
February 13, 1990 |
| There are disclosed two embodiments of a stuffing box for a movable stem of a valve, wherein each stuffing box includes first and second primary packing assemblies at its inner and outer ends, respectively, a third packing assembly intermediate the first and second packing assemblies and |
| 4878546 |
Self-aligning top drive |
November 7, 1989 |
| A self-aligning top drive device and gimballing apparatus therefor. The gimballing apparatus provides horizontal and tilting movement to maintain alignment between a top drive and a tubular or tubulars suspended in a derrick, the gimballing provided by pivot pins extending from the sides |
| 4827967 |
Plug valve |
May 9, 1989 |
| A plug valve and a sealing assembly for a plug valve. A plug valve having a plug closure member for sealing off the open end of a conduit and thereby preventing flow of a first fluid through the conduit, the plug closure member connected to a hollow stem tube, a channel for the flow of a |
| 4813817 |
Plug valve |
March 21, 1989 |
| A plug valve, a check valve for a plug valve, a pressure regulator for a plug valve, and a check valve for a conduit. A plug valve having a plug closure member for sealing off the open end of a conduit and thereby preventing flow of a first fluid through the conduit, the plug closure |
| 4813493 |
Hydraulic top drive for wells |
March 21, 1989 |
| Well apparatus including a top drive assembly having a hollow drive stem driven through a gear assembly by a plurality, two or more, of hydraulic motors, the drive stem adapted to be attached to a well swivel at upper end and an intermediate sub or a string at the lower end, the rotary |
| 4800968 |
Well apparatus with tubular elevator tilt and indexing apparatus and methods of their use |
January 31, 1989 |
| An elevator bail with elongated slots, an elevator tilting assembly and indexing apparatus, and a top drive drilling unit in combination with such devices that are connected to the upper end of a drill string and movable upwardly and downwardly with the drill string along a guide apparat |
| 4753300 |
Hydraulic top drive for wells |
June 28, 1988 |
| An hydraulic top drive apparatus and tubular handling device mounted beneath a conventional crown block, traveling block, bail, and swivel, and including an hydraulically powered top drive pipe rotating device having a single hollow shaft with threads at each end for mating on one end wi |
| 4693452 |
Valve |
September 15, 1987 |
| Control valve for controlling the flow of material, the valve including a body with an inlet and an outlet, a disc mounted in the body for closing and opening the valve, the disc mounted on a guide which is secured to the body, the guide mounted on a support, and slots extending through |
| 4667731 |
Coke cooler |
May 26, 1987 |
| A bulk hot coke cooler with a vessel for holding the coolant material and a drum rotatably supported within the vessel so that when the drum rotates, it moves through the coolant, the drum having a plurality of hollow cooling pockets going from one side of the drum to the other which |
| 4557804 |
Coke cooler |
December 10, 1985 |
| A bulk hot coke cooler with a vessel for holding the coolant material and a drum rotatably supported within the vessel so that when the drum rotates, it moves through the coolant, the drum having a plurality of hollow cooling pockets going from one side of the drum to the other which |
