Segmented sleeve on a downhole tool string component
View Patent ↗In one aspect of the invention a downhole tool string component has a segmented sleeve slideably attached over the exterior of a mandrel which is adapted for connection to an adjacent tool string component. An end of the sleeve is abutted against a shoulder element of the mandrel and an opposite end of the sleeve is axially loaded by a threaded element attached to the mandrel. The sleeve comprises at least one sleeve segment with an engagement end comprising at least one axial anti-rotation assembly adapted to transfer torque to an adjacent sleeve segment, the shoulder element, or the threaded element.
1. A downhole tool string component, comprising;
a segmented sleeve slideably attached over the exterior of a mandrel which is adapted for connection to an adjacent tool string component;
an end of the sleeve is abutted against a shoulder element of the mandrel and an opposite end of the sleeve is axially loaded by a threaded element threadedly attached to the mandrel;
the sleeve comprises at least one sleeve segment with an engagement end comprising at least one axial anti-rotation assembly adapted to transfer torque to an adjacent sleeve segment, the shoulder element, or the threaded element.
2. The tool string of claim 1 , wherein the sleeve is in communication with a power source.
3. The tool string of claim 1 , wherein the sleeve comprises electronic components within blades extending from the sleeve.
4. The tool string of claim 3 , wherein the electronic components comprise a Lacoste gravimeter, an absolute gravimeter, a superconducting gravimeter, gyros, computer chips, memory, electronic filters, AD/DA converters, power sources, buffers, sensors, drilling instrumentation, processors, or a combination thereof.
5. The tool string of claim 1 , wherein the sleeve comprises pins disposed on the inner diameter of the sleeve adapted to attach to the outer surface of the mandrel.
6. The tool string of claim 1 , wherein the sleeve comprises a cylindrical seal extending from the bore of one segment of the sleeve to the bore of another segment of the sleeve.
7. The tool string of claim 6 , wherein the seal is an o-ring disposed on the interior of the sleeve.
8. The tool string of claim 1 , wherein the anti-rotation assembly comprises a stress release groove on spaces intermediate teeth.
9. The tool string of claim 1 , wherein the mandrel comprises windows disposed on the exterior of the mandrel that engages pins.
10. The tool string of claim 1 , wherein the mandrel is a drill pipe axially disposed within the sleeve.
11. The tool string of claim 1 , wherein the anti-rotation device comprises teeth extending from one segment to another adjacent segment.
12. The tool string of claim 11 , wherein the teeth are adapted to withstand 20,000 ft/lbs of torque.
13. The tool string of claim 11 , wherein the teeth comprise a wave geometry.
14. The tool string of claim 11 , wherein the teeth comprise a thickness equal to the thickness of the sleeve wall.
15. The tool string of claim 11 , wherein the teeth comprise a jagged geometry with the peak of each tooth offset to one side.
16. The tool string of claim 11 , wherein the teeth are formed on the outer surface of the sleeve extending toward an adjacent segment.
17. The tool string of claim 1 , wherein the anti-rotation assembly comprises spaces intermediate teeth adapted to receive teeth from the opposing segment.
18. The tool string of claim 17 , wherein the spaces intermediate the teeth comprise a width equal to the width of the teeth.
19. The tool string of claim 18 , wherein the spaces comprise a depth equal to the height of the teeth.
20. The tool string of claim 1 , wherein the shoulder element is threaded onto the mandrel.