Apparatus for forcing tubular elements into and out of...

Details Apparatus for forcing tubular elements into and out of... Apparatus for forcing tubular elements into and out of...

E - Fixed Constructions

21

B

166/52

E21B 17/00 (2006.01) E21B 19/22 (2006.01) E21B 33/068 (2006.01)

Patent

CA 1178533

ROY R. VANN OUR FILE #590 APPARATUS FOR FORCING TUBULAR ELEMENTS INTO AND OUT OF BOREHOLES ABSTRACT OF THE DISCLOSURE Apparatus for forcing small tubular elements, such as 0.10 inch outside diameter capillary tubing, into and out of a borehole. The apparatus includes an annular seal means which sealingly receives the tubing therethrough. A pair of confronting rollers engage one another with the exterior surface of the tubing being compressed therebetween so that contra-rotational motion of the rollers in one direction or another forces the tubing uphole or downhole. A motor drives a shaft received through the rollers. The rollers engage and force the tubing to move uphole and downhole, thereby stripping the tubing through the seal means as well as overcoming the piston effect brought about by the pressure differential between the borehole and ambient. -1-

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