Real time torque system
Apparatus and methods for measuring in-situ applied torque in tubular operations. A torque cylinder has a first end and a second end. A torque rod is at least partially contained in the torque cylinder and is coupled to the first end of the torque cylinder. The torque rod extends longitudinally outward from the second end of the torque cylinder. A strain gauge is connected to the torque rod at a predetermined distance from the first end of the torque cylinder. The strain gauge is configured to measure in-situ the applied torque between two tubular drill string segments each coupled to a respective one of the torque cylinder and the torque rod.
1. An apparatus, comprising:
a torque cylinder having a first end and a second end;
a torque rod at least partially contained in the torque cylinder and coupled to the first end of the torque cylinder, wherein the torque rod extends longitudinally outward from the second end of the torque cylinder; and
a strain gauge connected to the torque rod and configured to measure in-situ the applied torque between two tubular drill string segments each coupled to a respective one of the torque cylinder and the torque rod.
2. The apparatus of claim 1 wherein a gap is maintained between the torque cylinder and the torque rod.
3. The apparatus of claim 2 wherein the gap is radially disposed between longitudinally adjacent portions of the torque cylinder and the torque rod so as to permit opposite axial rotation therebetween.
4. The apparatus of claim 1 wherein the torque rod is cylindrical in shape.
5. The apparatus of claim 1 further comprising an electrical connector attached to an outer surface of the torque rod.
6. The apparatus of claim 5 wherein the electrical connector transmits torque data in real-time.
7. The apparatus of claim 1 further comprising at least one load cell configured to convert a force into an electrical signal.
8. The apparatus of claim 1 further comprising a plurality of connection adapters each configured to connect one of the torque rod and the torque cylinder to one of the two tubular drill string segments.
9. The apparatus of claim 1 , wherein the strain gauge is connected via an adhesive component.
10. The apparatus of claim 1 , wherein the torque rod is constrained to rotational motion relative to the torque cylinder.
11. The apparatus of claim 10 , wherein a plurality of bearings constrains the motion.
12. The apparatus of claim 11 , wherein an O-ring is concentrically disposed between the torque rod and the torque cylinder to prevent fluid flow to a cavity between the torque rod and the torque cylinder.
13. An apparatus, comprising:
a torque cylinder having a torque rod extending axially longitudinally therethrough, wherein the torque rod is constrained to rotational motion by a plurality of bearings, and wherein the torque cylinder defines an aperture;
a first torque arm coupled to the torque cylinder and extending radially outward from the torque cylinder;
a second torque arm coupled to the torque rod and extending radially outward through the aperture; and
a load cell configured to attach to the first torque arm and measure applied torque when the second torque arm is forced into compressive contact therewith.
14. The apparatus of claim 13 wherein the torque cylinder comprises a set screw configured to prevent axial movement of the torque rod.
15. The apparatus of claim 13 wherein the load cell is a piezoresisitive transducer.
16. The apparatus of claim 13 wherein the first and second torque arms each comprise a pivoting saddle configured to seat the load cell on the first torque arm and move relative to the second torque arm.
17. The apparatus of claim 13 , wherein the load cell is attached to the first torque arm with an adhesive component.