E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
354/21
E21B 47/00 (2006.01) E21B 47/12 (2006.01) G06F 17/00 (2006.01)
Patent
CA 1256209
Abstract A self-contained memory gauge includes either semicon- ductor or magnetic core memory for retaining downhole infor- mation related to sampled parameters, such as borehole temperature and pressure. A microprocessor-based computer manages the power utilization by independently and selec- tably energizing and de-energizing different sections of the gauge. The magnetic core memory is tested for operability, and the addressing of the magnetic core memory is adjusted in accordance with any inoperable memory locations. Samples of the monitored environmental conditions can be taken at variable rates dependent upon software monitoring of the condition, the remaining battery life and the remaining memory capacity and in response to hardware monitored pressure changes. Each sample can be taken to a selectable resolution. A watchdog circuit monitors the microprocessor to insure that it is operating within a preselected time limit.
508446
Anderson Terry O.
Dant Ronald E.
Donaghe Charles D.
Duncan Richard L.
Forehand Gilbert H.
Company Halliburton
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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