Downhole tool sensor system and method
AssigneeSchlumberger Technology Corporation
InventorsCHRISTOPHER C. BOGATH, Kimi M. Ceridon, Kate I. Gabler, Minh Trang Chau
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Abstract
An apparatus and method for determining forces on a downhole drilling tool is provided. The downhole tool is provided with a drill collar operatively connectable to the drilling tool, and a sensor mounted about the drill collar. The sensor is adapted to measure deformation of the drill collar whereby forces on the drilling tool are determined. The sensor may be part of a force measurement system, a strain gauge system or a drilling jar system. The drill collar is adapted to magnify and/or isolate the deformation applied to the drill string.
Claims40
An apparatus for measuring a load on a downhole drilling tool suspended in a wellbore via a drill string, comprising:
- a drill collar operatively connectable to the drill string, the drill collar adapted to magnify deformation resulting from forces received thereto;
- a sensor mounted in the drill collar, the sensor adapted to measure the deformation of the drill collar whereby forces on the drilling tool are determined.
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A downhole sensor for measuring a load on a downhole drilling tool suspended in a wellbore via a drill string, comprising:
- a first sensor element positioned in the downhole tool;
- and
- a second sensor element positioned in the downhole tool,
- wherein the first sensor element and the second sensor element are coupled to the dowhhole tool such that one selected from a relative position of the first and second element and an area between the first and second element is changed when the drilling tool is subject to the load.
Dependencies are inferred from the claim text.