1
Gerald L Marquis: Method and apparatus for running and retrieving logging instruments in highly deviated well bores. Dresser, William E Johnson Jr, December 27, 1977: US04064939 (78 worldwide citation)

The system consists of means for running a logging instrument connected to a long rigid extension on a logging cable through open-ended drill pipe. The extension consists of a number of sections of tubing that are joined together on top of the instrument as the instrument is lowered into the drill p ...


2
Gerald L Marquis: Method and apparatus for running and retrieving logging instruments in highly deviated well bores. Dresser, William E Johnson Jr, April 4, 1978: US04082144 (74 worldwide citation)

The system consists of means for running a logging instrument and a long semi-rigid extension on a logging cable through open-ended drill pipe. A head on the upper end of the extension conforms sufficiently close to the inside diameter of the drill pipe that pump pressure down the drill pipe develop ...


3
H Eugene Sharp, Miles A Smither: Borehole acoustic telemetry system with phase shifted signal. NL Sperry Sun, Carl O McClenny, William E Johnson Jr, December 31, 1985: US04562559 (53 worldwide citation)

In a borehole telemetry system for acoustically transmitting data over a pipe suspended in a borehole, the level of noise in the data stream is inherently high due to the environment existing in a drilling operation and to the physical characteristics of a drill string. It has been discovered that c ...


4
Lot W Short Jr: Drill bit and method of metallurgical and mechanical holding of cutters in a drill bit. NL, William E Johnson Jr, Douglas H May Jr, Carl O McClenny, June 12, 1984: US04453605 (50 worldwide citation)

Disclosed is a method and apparatus for mechanically and metallurgically holding a cutter in a drill bit pocket. The method includes using powder metallurgy techniques in the formation of a drill bit member having a plurality of pockets configured to inhibit displacement of cutters out of the pocket ...


5
James G Stockton: System for detecting blow out and lost circulation in a borehole. NL, Carl O McClenny, William E Johnson Jr, July 9, 1985: US04527425 (48 worldwide citation)

A drilling mud flow rate detector, including a sub adapted for being positioned in the drill string, having a sonic signal generator located near the center of the sub in both the incoming mud flow path and the return mud flow path. A set of sonic signal receivers is located at both ends of the sub ...


6
Nigel D Griffin: Manufacture of rotary drill bits. NL Petroleum Products, William E Johnson Jr, June 2, 1987: US04669522 (42 worldwide citation)

A method of making a rotary drill bit comprises forming a hollow mould for moulding at least a portion of the bit body, packing at least a part of the mould with powdered matrix material, and infiltrating the material with a metal alloy in a furnace to form a matrix, the alloy being a copper based a ...


7
Anthony W Russell, Michael K Russell: Apparatus for signalling within a borehole while drilling. NL Sperry Sun, Carl O McClenny, William E Johnson Jr, August 13, 1985: US04535429 (35 worldwide citation)

A down-hole signal transmitter for a mud pulse telemetry system comprises a flow constrictor defining a throttle orifice for the mud flow, a throttling member displaceable to vary the throughflow cross-section of the throttle orifice, and a pump for displacing the throttling member against the mud f ...


8
Jorg August Angehrn: Method and apparatus for logging earth boreholes. Dresser, William E Johnson Jr, August 16, 1977: US04041780 (33 worldwide citation)

A self-contained, battery powered well logging instrument is pumped down the interior of a drill pipe string having a catcher sub at its lower end. When the logging instrument latches into the catcher sub, the pumped fluid circulation is blocked, after which increased pump pressure switches a valve ...


9
Bobby L Douglas: Oil well pumpoff control system. Dresser, Michael J Caddell, William E Johnson Jr, February 3, 1976: US03936231 (32 worldwide citation)

A sensor associated with the production of an oil well generates a signal indicative of pumpable fluid available in the wellbore. The signal activates a first oscillator whose count is compared with a variable frequency oscillator having a frequency of approximately one-half that of the first oscill ...


10
Daniel F Coope: Formation density logging using multiple detectors and sources. NL, Carl O McClenny, William E Johnson Jr, June 24, 1986: US04596926 (28 worldwide citation)

A gamma ray density sub and method useful for measurement-while-drilling applications utilizing three pairs of gamma ray sources and detectors located symmetrically about the axis of the sub and computation of the product of the counting rates obtained from the three detectors to indicate the averag ...