| Patent Number |
Title Of Patent |
Date Issued |
| 4450539 |
Apparatus for measuring the relative position of a downhole tool in a bore hole |
May 22, 1984 |
| An apparatus for accurately determining the relative positioning of a well logging sonde or downhole tool in a bore hole is disclosed. The apparatus comprises an anchor for engaging the wall of the bore hole in fixed position and adapted to be carried into the bore hole on the downhole t |
| 4431064 |
Hydraulic drive apparatus for downhole tools providing rotational and translational motion |
February 14, 1984 |
| An hydraulic drive apparatus for use in downhole tools is described. The apparatus provides rotational and translational movement to a cutting tool element disposed in a downhole tool or sonde automatically adjusting advancing motion of the cutting tool to the rate of rotational movement |
| 4365668 |
Side wall clamp for downhole tools |
December 28, 1982 |
| A side wall clamp is disclosed for use in conjunction with downhole tools, the clamp having a fail-safe mechanism which permits unclamping of the tool from the bore hole wall even if the clamp actuator means is inoperative, by exerting upward pull on the wire line or drill string to |
