E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/01 (2012.01) E21B 17/00 (2006.01) E21B 21/08 (2006.01) E21B 23/00 (2006.01) E21B 23/02 (2006.01) E21B 47/06 (2012.01)
Patent
CA 2316467
A drill string section for use in making up a drill string for oil and gas drilling carries instrumentation for measurement while drilling and logging while drilling operations. The instrumentation includes a dynamic pressure device for measuring drill string bore pressure of incoming pressurized fluid and drill string annular pressure of returned pressurized fluid. The instrumentation is retrievable from the drill string when the drill string section is stuck or otherwise abandoned downhole. Said instrumentation can also be returned down hole and re-seated in instances where the drill string is re-commissioned for operation, or in instances wherein the tool needed replacement. The drill string section comprises a length of drill string pipe having a bore defined by an inner surface of a wall which has an outer surface. A cylindrical landing sleeve and a support for centering the sleeve in the pipe bore is provided. Communicating ports extend through the drill pipe wall from the outer pipe surface through one or more leg supports to an inside surface of the landing sleeve. The instrumentation is provided in an elongate cylindrical tool shell. The outer surface of the tool shell has spaced apart seals which engage the inside surface of the landing sleeve. The seals are located in the sleeve on either side of the communicating port(s), forming a leak tight annular region that eventually communicates through appropriate ports to a pressure transducer. The instrumentation in the tool shell has a first terminated port in the tool shell located between the seals which communicates with a pressure sensor used to measure drill string annular pressure. A second terminated port in the tool shell opens into the drill string bore and terminates at a second pressure sensor, permitting a pressure measurement of the drill string bore to be made independently of the said drill string annular pressure. 13
Camwell Paul L.
Dopf Anthony Robert
Liscombe Randall S.
Logan Derek W.
Sutherland Michael T.
Ryan Energy Technologies Inc.
Sim & Mcburney
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