| 摘要 |
A system for perforating a well includes a perforating gun 10 and a swivel 12 suspended from a wireline 50. An orientation sub 14 is provided above the gun 10 and a rotational latching mechanism 90 rotationally connects the wireline to the perforating gun in one direction, while allowing the swivel to rotationally disconnect the gun from the wireline in an opposing direction. According to the method of the invention, the gun may be lowered in the well from the wireline to a depth greater than the desired firing depth until the gun is rotated to its desired azimuthal position, and the gun then raised by the wireline to the desired firing depth with a rotational latching and swivel mechanisms maintaining the gun at its desired azimuthal position.
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