| 主权项 |
1. An apparatus for maintaining a gas or oil well, comprising:
a longitudinal axis; a first longitudinal end; a second longitudinal end; at least one wall connecting the first and second longitudinal ends; a first opening at the first longitudinal end; a first space:
enclosed by the at least one wall; and,continuous with the first opening; at least one of:
a second opening at the second longitudinal end, the second opening:
continuous with the first space; and,facing in a first longitudinal direction parallel to the longitudinal axis; or,at least one second opening passing through the at least one wall and continuous with the first space; and, a seal element radially disposed about the at least one wall, wherein:
the apparatus is arranged to be placed into a production tubing for a gas or oil well;the seal element is arranged to seal the wall with respect to the production tubing;the one of the second opening at the second longitudinal end or the at least one second opening passing through the at least one wall is arranged to receive compressed air; and,the first space is arranged to channel the compressed air through the first opening to an area of the oil or gas well deeper than a position of the apparatus in the production tubing. |
