1
John Fuller, Joseph A Gasan: Rotary drill bit for use in drilling holes in subsurface earth formations. Reed Tool, Browning Bushman Zamecki & Anderson, December 26, 1989: US04889017 (214 worldwide citation)

A rotary drill bit for use in drilling holes in subsurface earth formations comprises a bit body having a shank at one end for connection to a drill string and an operating end face at the other end. A plurality of first cutting structures, each comprising a preform cutting element, is mounted in th ...


2
Richard A Meador: Transformer cable connector. NL, Browning Bushman Zamecki & Anderson, August 12, 1986: US04605268 (147 worldwide citation)

Connectors for electrically coupling conductors wherein the connection is effected by current coupling are disclosed. Each connector includes a toroidal coil and a housing member. The connection is accomplished by aligning the toroidal coils generally parallel and closing the housing members to prov ...


3
Richard A Meador, Larry W Thompson, William R Grayson: Drill stem logging with electromagnetic waves and electrostatically-shielded and inductively-coupled transmitter and receiver elements. NL, Browning Bushman Zamecki & Anderson, November 15, 1988: US04785247 (142 worldwide citation)

An apparatus and method for measuring formation parameters by transmitting and receiving electromagnetic signals by antennas disposed in recesses in a tubular housing member and including apparatus for reducing the coupling of electrical noise into the system resulting from conducting elements locat ...


4
Charles O Stokley, Lawrence Sanford: Multiple-set downhole tool and method. Tam International, Browning Bushman Zamecki & Anderson, January 16, 1990: US04893678 (132 worldwide citation)

A downhole tool is provided suitable for multiple setting and unsetting operations in a well bore during a single trip. The downhole tool is suspended in the wellbore from a tubing string, and is activated by dropping a metal ball which plugs the passageway through the tubing string, such that tubin ...


5
Roy F House, Lonnie D Hoover: Hydrated hydroxyethyl cellulose compositions. NL, Browning Bushman Zamecki & Anderson, January 29, 1985: US04496468 (104 worldwide citation)

A method of activating hydroxyethyl cellulose (HEC) such that the HEC will hydrate in heavy brines having a density greater than about 13.5 pounds per gallon at ambient temperature, the activated HEC compositions so produced, and viscous well servicing compositions wherein an oleaginous liquid and a ...


6
Michael C Chang: Alignable, threaded, sealed connection. Western Atlas International, Browning Bushman Zamecki & Anderson, March 13, 1990: US04907828 (97 worldwide citation)

The present invention is directed to an apparatus and method for assembling, aligning and securing a sealed connection. The apparatus and method of the present invention advantageously employ the mechanical leverage of a threaded connection, preferably square threads, to overcome the high O-ring sea ...


7
Michael J Sciarra, Victor L Cestaro: Vital signs monitor. F William Carr, Browning Bushman Zamecki & Anderson, January 22, 1985: US04494553 (92 worldwide citation)

Provision is made to monitor for vital signs, such as respiratory activity and cardiac activity. The monitoring equipment is mounted by a belt to a person being monitored. Multiple Inductance coils carried by the belt move relative to each other in response to breathing, and the associated mutual in ...


8
Paul F Rodney, James R Birchak: System for acoustic caliper measurements. NL, Browning Bushman Zamecki & Anderson, May 12, 1987: US04665511 (87 worldwide citation)

The present invention relates to an apparatus and method for calipering a borehole using acoustic measurements within the borehole. These acoustic measurements are useful for measuring the reflectivity of the side walls of a borehole and for calipering a borehole in a wireline or measurement while d ...


9
John D Barr: Drag bit and cutters. NL, Browning Bushman Zamecki & Anderson, June 10, 1986: US04593777 (78 worldwide citation)

A drill bit comprises a bit body having an operating end face. A plurality of self-sharpening cutters are mounted in the bit body and extend through the operating end face. The cutters have cutting faces adapted to engage an earth formation and cut the earth formation to a desired three-dimensional ...


10
John D Barr: Rotary drill bits with nozzle former and method of manufacturing. NL Petroleum Products, Browning Bushman Zamecki & Anderson, September 22, 1987: US04694919 (76 worldwide citation)

A method of manufacturing by a power metallurgy process a rotary drill bit including a bit body having an external surface on which are mounted a plurality of preform cutting elements, and an inner passage for supplying drilling fluid to at least one nozzle located in a socket at the external surfac ...



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