| 摘要 |
A pair of telescoping conduits are attached to oil or gas well production tubing which is hung or being run in a cased hole to increase the fluid resistance of the tubing if it is dropped in the hole and descends through fluid contained in the casing. The pair of telescoping conduits are attached to the production tubing to reduce the risk of damage or loss to the casing pipe, the tubing or the well itself when a length of the production tubing having the telescoping conduits attached is inadvertently dropped into and through the casing. In addition, the invention will lessen the cost of "fishing" the dropped tubing out of the hole by reducing the chances of its becoming stuck when it hits bottom. In one embodiment the telescoping tubing is adapted to also separate gas from liquid entering the production tubing.
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