1
William E Showalter: Geopreater heating method and apparatus. Union Oil Company of California, Gregory F Wirzbicki, William O Jacobson, June 30, 1992: US05126037 (265 worldwide citation)

A separate heat source, such an a skin effect heater, is added to a subterranean heat exchanger and oxygen combustion device for upgrading viscous crude oil feeds. An insulated wire is integrated with combustion oxygen supply piping to form the skin effect heater operating in conjunction with the he ...


2
Mark D Mueller, Frank L Jones, Julio M Quintana, Kenneth E Ruddy, Michael G Mims: Well casing flotation device and method. Union Oil Company of California, Gregory F Wirzbicki, William O Jacobson, January 26, 1993: US05181571 (211 worldwide citation)

A ported float shoe (5) and a landing collar (16) are attached at a first end of a portion of a casing string (4) and a sliding air trapping insert (20) is attached at the other end. The air trapping insert (20) includes a fluid flow passageway (24) blocked by a plug (22) attached by shear pins to t ...


3
Mark D Mueller, William O Jacobson: Underbalance jet pump drilling method. Union Oil Company of California, Gregory F Wirzbicki, William O Jacobson, October 18, 1994: US05355967 (179 worldwide citation)

A method for rotary drilling and removing cuttings provides a underbalanced drilling fluid pressure at the drilling face but overbalanced pressure in the wellbore. The preferred method uses a rotary drill within a housing which also encloses a jet pump which draws and pressurizes the cuttings and dr ...


4
Brent F Chaffee, Brian J Kelly, Jeffery W Koepke, Michael J Kirby: Hydraulic fracturing of shallow wells. Union Oil Company of California, William O Jacobson, Gregory F Wirzbicki, December 5, 1995: US05472049 (111 worldwide citation)

A method for fracturing formations near a shallow horizontal well notches a wellbore at orientations such that later applied hydraulic pressure generates fractures only in preferred directions.


5
Mark D Mueller, Julio M Quintana, Robert M Hinkel: Coiled tubing drilling apparatus and method. Union Oil Company of California, Gregory F Wirzbicki, William O Jacobson, March 8, 1994: US05291956 (109 worldwide citation)

A low-cost method drilling and completing wells attaches a non-rotating jet drilling tool to coiled tubing. After drilling, the tubing portion outside the well is cut and the remaining tubing becomes the liner or casing for the well. By also using a residual bend remover, centralizers, and injecting ...


6
John L Hood III, J David Payne: Buoyancy assisted running of perforated tubulars. William O Jacobson, Gregory F Wirzbicki, October 10, 1995: US05456317 (99 worldwide citation)

The perforations of a pre-perforated tubular are plugged with interior protruding, mostly hollow plugs which temporarily seal the perforations. The plugs are capable of withstanding a significant pressure differential and, when combined with an insert, forming a flotation cavity containing a buoyant ...


7
William C Allen, William M Rickard, Daniel P Hoyer, David E Stikkers, Matthew L Kelley: Dual gasket lined pipe connector. Union Oil Company of California, William O Jacobson, Gregory F Wirzbicki, April 11, 1995: US05405171 (96 worldwide citation)

A multi-piece, pipe joint seal has a slidable interface between seal pieces. The slidable interface allows for slippage between pieces during pipe joint assembly and disassembly, minimizing rotational and other stresses on the seal pieces and pipe sealing surfaces which may damage or endanger the de ...


8
Mark D Mueller, Frank L Jones, Julio M Quintana, Kenneth E Ruddy, Michael G Mims: Well casing flotation device and method. Union Oil Company of California, Gregory F Wirzbicki, William O Jacobson, June 2, 1992: US05117915 (91 worldwide citation)

A ported float shoe (5) and a landing collar (16) are attached at a first end of a portion of a casing string (4) and a sliding air trapping insert (20) is attached at the other end. The air trapping insert (20) includes a fluid flow passageway (24) blocked by a plug (22) attached by shear pins to t ...


9
David J Payne: Repositioned running method for well tubulars. Union Oil Company of California, Gregory F Wirzbicki, William O Jacobson, January 4, 1994: US05275242 (82 worldwide citation)

Weighted segments are repositioned during the running of tubulars into a deviated portion of the well. One method of repositioning adds separate weights to the top of a tubular string, runs the separate weight partially "down" the well, removes the weight downhole from the tubular string, and reposi ...


10
Marion J Eftink: Database correlation method. Union Oil Company of California, William O Jacobson, Gregory F Wirzbicki, April 9, 2002: US06370547 (82 worldwide citation)

A multi-pass algorithm identifies duplicative information and correlates higher confidence and/or selected primary information in distributed databases. One embodiment determines a bounded area based at least in part on location information and/or location tolerances for a location-dependent attribu ...