| 摘要 |
<p>A circulating nipple (10) for use in circulating fluid through well casing while running the casing into a well, comprises a body portion (72) having a casing thread (74) thereon, which body portion defining at least one hole (88) adapted for receiving a handle or operating bar therein and an elongated neck portion (76) extending from the body portion (72) and having a union connection (82) thereon. The elongated neck portion (76) is adapted for engagement with a pipe wrench for making the nipple (10) up on the casing string. The operating bar may be used as an alternative to, or in addition to, the use of the pipe wrench for making the nipple up on the casing string. The invention includes methods of running casing using the circulating nipple (10). <IMAGE></p> |
