Baker Hughes Corporation

Smith International, Inc.

Roger P Herbert

Michael H Johnson

Vladimir Dubinsky

John W Harrell

James V Leggett, Iii

Andrew G Brooks

Joseph F Donovan

Paul J Seaton

Reese Jadwin

Christopher L Gann

William Thomas Balogh

Sheldon Rubin

Franklin L Schulte

The present invention provides methods for forming multiple wellbores from a single location. A relatively large diameter main wellbore is drilled to a known depth. A plurality of spaced apart wellbores are formed from the bottom of the main wellbore, wherein at least one such wellbore is a production wellbore for producing hydrocarbons from subsurface formations. Wellhead equipment for each production wellbore is installed at main wellbore bottom. Additional devices or equipment are also placed in the main wellbore, preferably near the bottom. Such equipment may include a fluid processing apparatus, chemical injection equipment for injecting chemicals or additives into the wellbores, compressors for injecting compressed gas into one or more of the production wellbores or for transporting a gas to the surface, robotics devices for placing and/or removing devices or materials from the wellbores, a control unit for monitoring and controlling apparatus and devices in the main wellbore and the production wellbore, and any other desired equipment for performing a useful function relating any of the wellbores. A secondary access wellbore may be formed from the main wellbore or the surface for storing apparatus that is used to monitor and/or control the operation of devises in the production wellbores during the various stages in the life of such wellbores. Some of the equipment deployed in the main wellbore is prefabricated and may be retrieved. selective redundant equipment is provided to allow uninterrupted production from the various wellbores.

Method of forming and servicing wellbores from a main wellbore

The present invention provides a system for drilling boreholes having a downhole subassembly which contains an acoustic measurement-while-drilling system. The acoustic system contains an acoustic transmitter and receiver for determining the acoustic velocity through the formations surrounding the borehole ad an acoustic transmitter and a set of receivers for determining the bed boundaries surrounding the borehole formation utilizing the acoustic velocities measured by the system. The downhole subassembly also contains a computing system which performs computations downhole and transmits certain answers uphole during the drilling operations. The bed boundary information is utilized to drill the wellbore along a desired wellbore path. The downhole computing system correlates the acoustic sensor measurements with other measurement-while-drilling measurements and transmits selected correlated information uphole. The downhole computing system contains predetermined well profile which is updated based on the bed boundary information. The system may be adapted to correct or update seismic data and offset well data based on acoustic sensor system measurements.

Drilling system with an acoustic measurement-while-driving system for

A device for measuring the cross section of the stator of a downhole motor having a carrier shaped to travel through the helicoidal interior of the stator and a sensor including first and second bending beam-strain gage structures for generating electrical signals indicative of the cross section of the stator.

Electronic stator measurement device

Real time responsive devices are mounted at the inlet to an in-hole motor to measure the interval of time during which drilling fluid circulates through the motor.

Time recorder for in-hole motors

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Spring, TX, United States of America

Roger P Herbert