Electronically activated underreamer and calliper tool
DCFirst Claim
1. An integrated expansion and calliper tool that permits simultaneous underreaming and measurement of the diameter of a wellbore as drilled by a drilling rig, comprising at least one radially extendable cutter block movable within a tool body to underream, at least one calliper to measure wellbore diameter and housed within a tool body, and a processor to receive caliper data, the at least one calliper and the processor being inter-linked to permit delivery of a predetermined wellbore diameter;
- wherein at least one positional sensor determines a position of the cutter block relative to the tool; and
where measurements are processed by the processor that compares the measured wellbore diameter with a minimum programmed diameter and the cutter block position to verify correct operation of the tool.
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Accused Products
Abstract
An electronically activated tool (50) comprising a tool body, cutter blocks and sensors with means for attachment to a drilling support and rotation so as to permit the simultaneous underreaming and measurement of the diameter of a wellbore (especially in oil and gas drilling) characterized by a means of activation using an electronic signal sent by mud-pulse, fiber-optics, wireless transmission or other means which may also communicate commands and receive data from the underreamer during drilling, at least one radially extendable cutter block (62) incorporating positional sensors adapted to measure the relative position of the cutter block to the tool, at least one calliper means (76) to measure wellbore diameter, all of which are inter-linked by a means of communication using receivers, sensors and microprocessors and a system that optimizes underreaming or expansion (22) by simultaneously comparing and correlating wellbore diameter data (22) and underreaming parameters in real-time or in memory.
137 Citations
63 Claims
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1. An integrated expansion and calliper tool that permits simultaneous underreaming and measurement of the diameter of a wellbore as drilled by a drilling rig, comprising at least one radially extendable cutter block movable within a tool body to underream, at least one calliper to measure wellbore diameter and housed within a tool body, and a processor to receive caliper data, the at least one calliper and the processor being inter-linked to permit delivery of a predetermined wellbore diameter;
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wherein at least one positional sensor determines a position of the cutter block relative to the tool; and where measurements are processed by the processor that compares the measured wellbore diameter with a minimum programmed diameter and the cutter block position to verify correct operation of the tool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. Underreaming control apparatus comprising:
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at least one calliper, an underreamer, and a processor in data reception contact with the calliper and in contact with a surface interface and the underreamer, wherein the processor controls the underreamer in response to the calliper measuring wellbore diameter by comparing a measured wellbore diameter using data from the at least one caliper with a cutter block position and a predetermined wellbore diameter, and activates or deactivates the underreamer in response to the calliper. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A method of drilling an oil and gas well comprising a bottom hole assembly configured to deliver a predetermined underreamed borehole diameter, comprising:
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providing an underreamer including at least one extendable cutter block housed substantially within a tool body; providing a calliper including at least one acoustic sensor for measuring wellbore diameter; and providing a processor to control the cutter block position to underream the wellbore in response to the caliper by comparing a measured wellbore diameter with a cutter block position and a predetermined wellbore diameter. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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Specification