Patent ID: 9145752
Filing Date: 2015-09-29
Classification: E21B

Abstract:
1. A clamping arrangement for clamping a first tubular well casing and a second tubular well casing wherein the first tubular well casing and the second tubular well casing are axially aligned and extend in opposite directions such that an end of the first well casing abuts an end of the second well casing, the arrangement comprising: a collar having an internal surface and an externally tapered surface; an annular component with an internally tapered surface arranged to cooperate with the tapered surface of the collar; and a continuous tubular member having an internal surface and an external surface, and the tubular member being located between the collar and the first and second tubular well casings, such that the internal surface of the tubular member contacts an external surface of both of the first and second well casings, wherein the collar and the annular component are relatively axially moveable between a first position in which the tapered surface of the annular component exerts no radial force on the collar and a second position in which the tapered surface of the annular component exerts sufficient radial force to urge the collar inwardly so as to elastically deform the tubular member such that the internal surface of the tubular member simultaneously grips and abuts the external surfaces of both the first tubular well casing and the second tubular well casing so as to form a seal between the tubular member and the first well casing and a seal between the tubular member and the second well casing.