Communication methods and apparatuses for downhole logging tools
First Claim
1. A communication method for a downhole logging tool that (a) is configured to energize rock surrounding a well or borehole and receive emitted energy that has passed through the rock;
- (b) is fixed to a drill pipe in the well or borehole and (c) includes a logging tool movement sensor, the drill pipe being connected at a location remote from the downhole logging tool to one or more motors that are capable of controlledly rotating and/or longitudinally reciprocating the drill pipe in the well or borehole, the method including the steps of;
causing rotation and/or longitudinal reciprocation of the drill pipe under the influence of the motor;
detecting, using the logging tool movement sensor, rotation of the downhole logging tool caused by rotation of the drill pipe; and
generating a first signal of the logging tool movement sensor that is indicative of rotation of the downhole logging tool,wherein the logging tool movement sensor comprises an angular rate sensor that detects rotation of the logging tool and generates the first signal indicative of such rotation;
wherein the step of detecting rotation of the downhole logging tool includes the step of assessing whether the average rate of rotation of the downhole logging tool in one or more predetermined time periods exceeds a predetermined threshold; and
wherein the predetermined threshold is distinct from a drilling rate of rotation.
1 Assignment
0 Petitions
Accused Products
Abstract
Logging tool communication apparatus (10), for carrying out a downhole communication method, comprises rotatable and/or longitudinally reciprocable drill pipe (12) including fixed or capable of being fixed in a co-rotative and/or co-reciprocable relationship at an in-use downhole end an in-use downhole logging tool (27). The logging tool (27) includes a movement sensor (33); and the apparatus (10) includes a motor, at a location remote from the logging tool (27), for causing rotation and/or reciprocation of the drill pipe (12) in a borehole or wellbore (18). The apparatus (10) includes one or more control elements for selectively controlling operation of the motor so as to cause selective rotation and/or reciprocation of the drill pipe (12) which causes movement of the logging tool (27), when fixed to the drill pipe (12), in a manner that is detectable by the movement sensor (33).
20 Citations
48 Claims
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1. A communication method for a downhole logging tool that (a) is configured to energize rock surrounding a well or borehole and receive emitted energy that has passed through the rock;
- (b) is fixed to a drill pipe in the well or borehole and (c) includes a logging tool movement sensor, the drill pipe being connected at a location remote from the downhole logging tool to one or more motors that are capable of controlledly rotating and/or longitudinally reciprocating the drill pipe in the well or borehole, the method including the steps of;
causing rotation and/or longitudinal reciprocation of the drill pipe under the influence of the motor; detecting, using the logging tool movement sensor, rotation of the downhole logging tool caused by rotation of the drill pipe; and generating a first signal of the logging tool movement sensor that is indicative of rotation of the downhole logging tool, wherein the logging tool movement sensor comprises an angular rate sensor that detects rotation of the logging tool and generates the first signal indicative of such rotation; wherein the step of detecting rotation of the downhole logging tool includes the step of assessing whether the average rate of rotation of the downhole logging tool in one or more predetermined time periods exceeds a predetermined threshold; and wherein the predetermined threshold is distinct from a drilling rate of rotation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 41, 42, 43, 44)
- (b) is fixed to a drill pipe in the well or borehole and (c) includes a logging tool movement sensor, the drill pipe being connected at a location remote from the downhole logging tool to one or more motors that are capable of controlledly rotating and/or longitudinally reciprocating the drill pipe in the well or borehole, the method including the steps of;
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21. A communication method for a downhole logging tool that (a) is configured to energize rock surrounding a well or borehole and receive emitted energy that has passed through the rock;
- (b) is fixed to a drill pipe in the well or borehole and (c) includes a logging tool movement sensor, the drill pipe being connected at a location remote from the downhole logging tool to one or more motors that are capable of controlledly rotating and/or longitudinally reciprocating the drill pipe in the well or borehole, the method including the steps of;
causing rotation and/or longitudinal reciprocation of the drill pipe under the influence of the motor; detecting, using the logging tool movement sensor, rotation of the downhole logging tool caused by rotation of the drill pipe, and generating a first signal of the logging tool movement sensor that is indicative of rotation of the downhole logging tool, wherein the logging tool movement sensor comprises an angular rate sensor that detects rotation of the logging tool and generates the first signal indicative of such rotation; wherein the step of detecting rotation of the downhole logging tool includes the step of (ii)(a) assessing whether the average rate of rotation of the downhole logging tool in one or more predetermined time periods is less than a predetermined threshold; and wherein the predetermined threshold is distinct from a drilling rate of rotation. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 45, 46, 47, 48)
- (b) is fixed to a drill pipe in the well or borehole and (c) includes a logging tool movement sensor, the drill pipe being connected at a location remote from the downhole logging tool to one or more motors that are capable of controlledly rotating and/or longitudinally reciprocating the drill pipe in the well or borehole, the method including the steps of;
Specification