1
Edward K Falk: Mapping of two-dimensional surface detail on three-dimensional surfaces. Computer Design, Edgar A Zarins, Malcolm L Sutherland, October 19, 1993: US05255352 (185 worldwide citation)

A system and method for providing surface detail to mathematically defined three-dimensional surfaces which preserves the specific dimensional integrity of the surface detail image being mapped to provide dimensionally correct surface detail. This is accomplished by performing the intermediate step ...


2
Thomas F Bailey, John E Campbell: Hydraulic clamp for rotary drilling head. MASX Energy Services Group, Edgar A Zarins, Malcolm L Sutherland, June 11, 1991: US05022472 (155 worldwide citation)

A rotary drilling head having an upper body incorporating a kelly bushing removably clamped onto a stationary spool. The clamp assembly is hydraulically controlled to permit remote operation and access to the drive bearings and stripper rubbers within the drilling head. Secondary manual means for un ...


3
Mark L Wyatt: Drillable bridge plug. Arrow Oil Tools, Edgar A Zarins, Malcolm L Sutherland, Leon E Redman, November 15, 1988: US04784226 (146 worldwide citation)

A bridge plug having upper and lower slips for anchoring the plug and an elastomeric packing element for sealing within a well casing. The bridge plug may be set either mechanically or through a wireline pressure setting assembly. The small outer diameter of the bridge plug allows for fast run in an ...


4
Thomas F Bailey, John E Campbell: Whipstock packer assembly. Drilex Systems, Edgar A Zarins, Malcolm L Sutherland, Steven L Permut, August 23, 1988: US04765404 (134 worldwide citation)

A packing assembly for a whipstock in which the whipstock can be run into a well casing to a level above the bottom and milling through the casing wall without having to make a round trip with the well string. The packing assembly includes slip-type anchors which initially set the assembly and packi ...


5
Thomas F Bailey, Nehal M Shah: Casing patch seal. A Z International Tool Company, Edgar A Zarins, Malcolm L Sutherland, April 28, 1987: US04660863 (128 worldwide citation)

A casing patch for providing a connection between two casing sections which comprise a body means adapted to fit over an existing casing in a well bore and guide the patch into place, a slip means actuated by upward movement of the second casing section to tightly connect the two casing sections, an ...


6
Thomas F Bailey, Raymond A Todd Jr: Mud saver valve with replaceable inner sleeve. Drilex Systems, Edgar A Zarins, Malcolm L Sutherland, October 16, 1990: US04962819 (122 worldwide citation)

A mud saver valve for insertion within the drill string to retain mud in the drill pipe and prevent the mud column from flowing past the valve when pumping is interrupted. The valve body has a tubular body and a piston having an axial passage for the flow of drilling mud. This piston is biased withi ...


7
William A Rasor, Craig Stapleton: Adjustable cross rail for luggage carrier. Huron St Clair Company, Edgar A Zarins, Malcolm L Sutherland, March 27, 1990: US04911348 (114 worldwide citation)

An adjustable cross rail for a luggage carrier which utilizes a self-storing lever to release the rail stanchions. The stanchions cooperate with a longitudinal track which receives an adjustable slide bar threadably connected to the release lever. The track is clampingly engaged between the slide ba ...


8
Hamid Najmolhoda: Proportional variable force solenoid control valve. Hi Ram, Leon E Redman, Malcolm L Sutherland, January 29, 1991: US04988074 (104 worldwide citation)

A proportional variable force solenoid control valve with an armature reciprocably movable within the bore hole of a coreless solenoid bobbin in proportion to applied electrical current between positions corresponding to a closed valve position and a fully open position. The positioning of the armat ...


9
Manmohan S Kalsi, Patricio D Alvarez, Thomas F Bailey, Larry F Moeller: Turbine pump ring for drilling heads. Masx Energy Services Group, Edgar A Zarins, Malcolm L Sutherland, April 26, 1994: US05305839 (104 worldwide citation)

A drilling head for the controlled operation of the drill string while diverting well fluids from the well. The drilling head incorporates a kelly drive and at least one stripper rubber which rotate with the drill string extending through the drilling head. Rotation of the drive bushing and stripper ...


10
Thomas F Bailey, John E Campbell, Larry F Moeller: Whipstock assembly with hydraulically set anchor. MASX Energy Services Group, Edgar A Zarins, Malcolm L Sutherland, October 13, 1992: US05154231 (101 worldwide citation)

A one-trip whipstock assembly incorporating a hydraulically set anchor which includes an interlock for maintaining the anchor in its set position upon interruption of hydraulic pressure. The anchor is connected to the lower end of the assembly which also includes a whipstock for diverting cutting to ...