초록 ▼

A torque sub for use with a top drive is disclosed. A method of connecting threaded tubular members for use in a wellbore includes operating a top drive. The top drive rotates a first threaded tubular member relative to a second threaded tubular member. The method further includes measuring a torque

A torque sub for use with a top drive is disclosed. A method of connecting threaded tubular members for use in a wellbore includes operating a top drive. The top drive rotates a first threaded tubular member relative to a second threaded tubular member. The method further includes measuring a torque exerted on the first tubular member by the top drive. The torque is measured using a torque shaft rotationally coupled to the top drive and the first tubular. The torque shaft has a strain gage disposed thereon. The method further includes wirelessly transmitting the measured torque from the torque shaft to a stationary interface; measuring rotation of the first tubular member; compensating the rotation measurement by subtracting a deflection of the top drive and/or the first tubular member; determining acceptability of the threaded connection; and stopping rotation of the first threaded member when the threaded connection is complete or if the threaded connection is unacceptable.

대표청구항 ▼

The invention claimed is: 1. A method of connecting threaded tubulars for use in a wellbore, comprising: operating a top drive, thereby rotating a first threaded tubular relative to a second threaded tubular; measuring a torque exerted on the first tubular by the top drive, wherein the torque is me

The invention claimed is: 1. A method of connecting threaded tubulars for use in a wellbore, comprising: operating a top drive, thereby rotating a first threaded tubular relative to a second threaded tubular; measuring a torque exerted on the first tubular by the top drive, wherein the torque is measured using a torque shaft rotationally coupled to the top drive and the first tubular, the torque shaft having a strain gage disposed thereon; wirelessly transmitting the measured torque from the torque shaft to a stationary interface; measuring rotation of the first tubular; compensating the rotation measurement by subtracting a deflection of at least one of: the top drive, and the first tubular; determining acceptability of the threaded connection; and stopping rotation of the first threaded when the threaded connection is complete or if the threaded connection is unacceptable. 2. The method of claim 1, further comprising wirelessly transmitting electrical energy from a stationary interface to the torque shaft. 3. The method of claim 1, wherein: each of the two threaded tubulars has a shoulder, the method further comprises detecting a shoulder condition during rotation of the first tubular; and the threaded connection is complete when reaching a predefined rotation value from the shoulder condition. 4. The method of claim 3, wherein detecting the shoulder condition comprises calculating and monitoring a rate of change of torque with respect to rotation. 5. The method of claim 4, wherein acceptability is determined using the rate of change of torque with respect to rotation after detecting the shoulder condition. 6. The method of claim 3, wherein acceptability is determined using a value measured at or after the shoulder condition. 7. The method of claim 6, wherein the measured value is a torque value. 8. The method of claim 6, wherein the measured value is a rotation value. 9. The method of claim 3, wherein acceptability is determined using a relaxation rotation of the first threaded tubular. 10. The method of claim 1, wherein the rotation measurement is compensated by subtracting the deflection of the top drive. 11. The method of claim 10, further comprising calculating the deflection of the top drive using the measured torque. 12. The method of claim 10, further comprising wirelessly transmitting at least one of a calibration signal and a control signal from the stationary interface to the torque shaft. 13. The method of claim 1, wherein the rotation measurement is compensated by subtracting the deflection of the first tubular. 14. The method of claim 1, further comprising measuring a longitudinal load exerted on the top drive using the torque shaft, the torque shaft having a second strain gage disposed thereon. 15. A method of connecting threaded tubulars for use in a wellbore, comprising: operating a top drive, thereby rotating a first threaded tubular relative to a second threaded tubular; measuring a torque exerted on the first tubular by the top drive, wherein the torque is measured using a torque shaft rotationally coupled to the top drive and the first tubular, the torque shaft having a strain gage disposed thereon; wirelessly transmitting the measured torque from the torque shaft to a stationary interface; measuring rotation of the first tubular; compensating the rotation measurement by subtracting a deflection of the first tubular; and stopping rotation of the first threaded tubular when the threaded connection is complete. 16. The method of claim 15, further comprising wirelessly transmitting electrical energy from a stationary interface to the torque shaft. 17. The method of claim 15, wherein: each of the two threaded tubulars has a shoulder, the method further comprises detecting a shoulder condition during rotation of the first tubular; and the threaded connection is complete when reaching a predefined rotation value from the shoulder condition. 18. The method of claim 17, wherein detecting the shoulder condition comprises calculating and monitoring a rate of change of torque with respect to rotation. 19. The method of claim 15, further comprising measuring a longitudinal load exerted on the top drive using the torque shaft, the torque shaft having a second strain gage disposed thereon.