| 摘要 |
There is described a method of rotatably connecting the downhole end of a tubing string to a tubing anchor in a well bore, the method comprising the steps of connecting the downhole end of the tubing string to a first tubular sub, connecting the tubing anchor to a second tubular sub, providing an initial connection between the first and second tubular subs preventing both relative rotation and axial separation therebetween, fixing the tubing anchor in place in the well bore by means of torque transmitted through the tubing string and the first and second tubular subs to the tubing anchor, and rupturing the initial connection between the first and second tubular subs by means of tension applied to the first tubular sub, whereupon the first and second tubular subs may be axially separated by a predetermined amount so that one can rotate relative to the other and so that the tubing string is then rotatable relative to the tubing anchor.
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