1
Urbanosky Harold J: Methods and apparatus for testing earth formations. Schlumberger Technology Corporation, Archambeau Jr Ernest R, Sherman William R, Moore Stewart F, January 14, 1975: US3859851 (126 worldwide citation)

In the representative embodiments of the new and improved methods and apparatus for testing earth formations disclosed herein, fluid-admitting means are placed into sealing engagement with a potentially-productive earth formation. A first test chamber coupled to the fluid-admitting means is then slo ...


2
Nutter Benjamin P: Pressure controlled drill stem tester with reversing valve. Schlumberger Technology Corporation, Moseley David L, Sherman William R, Moore Stewart F, July 16, 1974: US3823773 (73 worldwide citation)

Methods and apparatus for testing offshore wells with testing equipment operated in response to changes in the pressure of fluids in the well annulus, wherein the test valve is opened and closed in response to such pressure changes to alternately flow and shut-in the formations, and a reversing valv ...


3
Bell William T: Methods and apparatus for testing earth formations composed of particles of various sizes. Schlumberger Technology Corporation, Archambeau Jr Ernest R, Sherman William R, Moore Stewart F, February 11, 1975: US3864970 (51 worldwide citation)

In the representative embodiments of the new and improved methods and apparatus disclosed herein for testing earth formations of differing compositions, fluid-admitting means carrying a selectively-sized filter of a unique design are selectively extended into sealing engagement with a potentially-pr ...


4
Nutter Benjamin P: Inflatable packer drill stem testing apparatus. Schlumberger Technology Corporation, Moseley David L, Sherman William R, Moore Stewart F, April 8, 1975: US3876000 (42 worldwide citation)

In accordance with an illustrative embodiment of the present invention, a drill stem testing apparatus that utilizes inflatable packer elements to isolate an interval of the borehole includes a uniquely arranged pump that is adapted to supply fluids under pressure to the elements in response to upwa ...


5
Catherall Reginald, Knowles Susan: Function generation by approximation employing interative interpolation. The Solartron Electronic Group, Sherman William R, Roylance Abrams Berdo & Kaul, January 29, 1974: US3789203 (42 worldwide citation)

A method of solving a function for values of a variable when values of an independent variable are given, the method being especially valuable for use in or with a computer, an advantage being minimization of storage requirements. The method is an extension of the branch of mathematics known as nume ...


6
Poilleux Jean Loup: Fiber optics distance converting technique. Compteure Schlumberger, Sherman William R, Moore Stewart F, February 19, 1974: US3792928 (38 worldwide citation)

According to an illustrative embodiment of the invention, a technique is described for producing signals varying as a function of the distance of a surface relative to a reference face, comprising transmitting a beam of coherent light to an admitting end of a fiber optic bundle to transmit light to ...


7
Kisling III James W: Drill stem testing methods and apparatus utilizing inflatable packer elements. Schlumberger Technology Corporation, Moseley David L, Sherman William R, Moore Stewart F, April 8, 1975: US3876003 (36 worldwide citation)

Methods and apparatus for isolating a well bore interval utilizing spaced inflatable packer elements and a pump suspended in the well on a pipe string. The pump includes an inner member connected to the packer elements and an outer member connected to the pipe string, said members defining a working ...


8
Urbanosky Harold J, Whitten Frank R: Methods and apparatus for testing earth formations. Schlumberger Technology Corporation, Archambeau Jr Ernest R, Sherman William R, Moore Stewart F, June 4, 1974: US3813936 (36 worldwide citation)

In the representative embodiments of the new and improved methods and apparatus for testing earth formations disclosed herein, fluid-admitting means are placed into sealing engagement with a potentially-producible earth formation and selectively-operable valve means on the fluid-admitting means are ...


9
Lehmann Joseph L, Lynch Frank: Fully digital spectrum analyzer using time compression and discrete fourier transform techniques. Weston Instruments, Sherman William R, Kavrukov I S, April 29, 1975: US3881097 (35 worldwide citation)

A fully digital spectrum analyzer accepting as an input either an analog signal or a series of digital numbers and using time compression and DFT (Discrete Fourier Transform) techniques to provide the spectral component values of the input signal. Novel techniques and means are used in obtaining the ...


10
Young David E: Subsurface safety valve apparatus. Schlumberger Technology Corporation, Moseley David L, Sherman William R, Moore Stewart F, February 11, 1975: US3865141 (35 worldwide citation)

A surface controlled, subsurface safety valve includes a tubular housing carrying a hinged flapper valve element that is moved to open position by a valve actuator sleeve. The sleeve is moved under the thrust of a coil spring that is compressed in response to downward movement of a hydraulically ope ...