Oilfield tubular torque wrench
First Claim
1. An oilfield tubular torque wrench comprising:
- a lower tong including a recess for accepting an oilfield tubular positioned along an axis passing through the recess;
an upper tong including a recess, the upper tong being mounted above the lower tong with the recess of the upper tong positioned above the recess of the lower tong so that the axis passes therethrough;
pipe gripping dies in the recesses of the upper tong and the lower tong, the pipe gripping dies being drivable between an extended position and a retracted position;
a swivel bearing comprising a bearing ring assembly between the upper tong and the lower tong permitting the upper tong and the lower tong to swivel relative to each other while the recesses remain positioned with the axis passing therethrough;
a drive system connected between the upper tong and the lower tong, the drive system configured to generate a force vector to drive the upper tong and lower tong to swivel on the swivel bearing; and
at least one of (i) a system to measure the actual radius measured perpendicularly to the force vector and between the force vector and the axis, and (ii) a system to measure the actual force vector being generated by the drive system when operational conditions are considered.
2 Assignments
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Accused Products
Abstract
A method for measuring applied torque of a oilfield tubular torque wrench, the oilfield torque wrench being operable to torque a tubular about an axis of rotation and the oilfield torque wrench including a lower tong including a recess through which the axis of rotation passes during operation; an upper tong including a recess, the upper tong being mounted above the lower tong with the recess of the upper tong positioned above the recess of the lower tong so that the axis of rotation passes therethrough; pipe gripping dies in the recesses of the upper tong and the lower tong; a swivel bearing between the upper tong and the lower tong permitting the upper tong and the lower tong to swivel relative to each other while the recesses remain positioned with the axis of rotation passing therethrough; a drive system connected between the upper tong and the lower tong, the drive system being operable to generate a force vector to drive the upper tong and lower tong to swivel on the swivel bearing, the method comprising: determining at least one of (i) the actual radius measurement measured perpendicularly to the force vector and between the force vector and the axis of rotation of the tubular, and (ii) the actual force measurement of that force being applied to torque the connection; and calculating torque based on the at least one measurement. A torque wrench includes systems for measuring actual radius and/or actual force.
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Citations
19 Claims
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1. An oilfield tubular torque wrench comprising:
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a lower tong including a recess for accepting an oilfield tubular positioned along an axis passing through the recess; an upper tong including a recess, the upper tong being mounted above the lower tong with the recess of the upper tong positioned above the recess of the lower tong so that the axis passes therethrough; pipe gripping dies in the recesses of the upper tong and the lower tong, the pipe gripping dies being drivable between an extended position and a retracted position; a swivel bearing comprising a bearing ring assembly between the upper tong and the lower tong permitting the upper tong and the lower tong to swivel relative to each other while the recesses remain positioned with the axis passing therethrough; a drive system connected between the upper tong and the lower tong, the drive system configured to generate a force vector to drive the upper tong and lower tong to swivel on the swivel bearing; and at least one of (i) a system to measure the actual radius measured perpendicularly to the force vector and between the force vector and the axis, and (ii) a system to measure the actual force vector being generated by the drive system when operational conditions are considered. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for measuring applied torque of a oilfield tubular torque wrench, the oilfield torque wrench configured to torque a tubular about an axis of rotation and the oilfield torque wrench including a lower tong including a recess through which the axis of rotation passes during operation;
- an upper tong including a recess, the upper tong being mounted above the lower tong with the recess of the upper tong positioned above the recess of the lower tong so that the axis of rotation passes therethrough;
pipe gripping dies in the recesses of the upper tong and the lower tong;
a swivel bearing comprising a bearing ring assembly between the upper tong and the lower tong permitting the upper tong and the lower tong to swivel relative to each other while the recesses remain positioned with the axis of rotation passing therethrough;
a drive system connected between the upper tong and the lower tong, the drive system being operable to generate a force vector to drive the upper tong and lower tong to swivel on the swivel bearing, the method comprising;determining at least one of (i) the actual radius measurement measured perpendicularly to the force vector and between the force vector and the axis of rotation of the tubular, and (ii) the actual force measurement of that force being applied to torque the connection when operational conditions are considered; and
calculating torque based on the at least one measurement. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
- an upper tong including a recess, the upper tong being mounted above the lower tong with the recess of the upper tong positioned above the recess of the lower tong so that the axis of rotation passes therethrough;
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17. A method for measuring applied torque of an oilfield tubular torque wrench having upper and lower pivoting zones, which method comprises:
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associating the upper and lower pivoting zones about a bearing zone disposed therebetween so that the upper and lower pivoting zones swivel relative to each other, while a gripping portion in each pivoting zone is positioned to surround an axis of rotation of an oilfield tubular passing therethrough and adapted to connect with the tubular; generating a force vector to drive the upper and lower pivoting zones to swivel about the bearing zone, determining at least one of (i) an actual radius measurement measured perpendicularly to a force vector and between a force vector and the axis of rotation of the tubular, and (ii) an actual force measurement of that force being applied to torque the connection; and
calculating torque based on the at least one measurement. - View Dependent Claims (18, 19)
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Specification