Patent ID: 7694733
Filing Date: 2010-04-13
Classification: E21B

Abstract:
1. A centraliser having a body adapted to receive therewith in a length of tubing to be centralised, the body having a recess provided on an inner surface of the body, wherein the centraliser has a deformable friction-reducing slider disposed in the recess, wherein the slider has an inner diameter that is smaller than an inner diameter of the inner surface of the body, so that a portion of the friction reducing slider protrudes from the inner surface of the body, so as to bear against the tubing thereby spacing the inner surface of the body of the centraliser from the tubing to be centralised, and wherein the slider is in the form of an annular ring and has an outer diameter that is larger than an inner diameter of the recess so that the slider has to be deformed to be inserted into the recess and is held therein by radial compression of the outer diameter of the slider by the inner diameter of the recess.