| 摘要 |
A series of down hole plugs are made from a common subassembly including, in some embodiments, a mandrel, a slips/seal section, a setting assembly and a mule shoe. To make the flow back plug, a ball check is placed in the mule shoe. To make the bridge plug, an obstruction is inserted in the mule shoe. To make the ball drop plug, the mule shoe is left unobstructed so any ball dropped in a well seats in a tapered inlet to the mandrel. To make a plug with a disintegratable check, a ball dropped in the well is of a type that disintegrated in frac liquids. Another embodiment is an improved adapter sleeve used on conventional setting tools. |
| 主权项 |
1. In combination, an expansible plug, a setting tool and an adapter connecting the setting tool and expansible plug,
the expansible plug comprising a slips/seal section expansible from a running in configuration into an expanded configuration to seal on an interior of a pipe string and a member expanding the slips/seal section upon an application of a setting force by the setting tool; the setting tool comprising a force creator and an output; and the adapter comprising an outer sleeve and a force transmitter, the force transmitter being inside the sleeve and in force transmitting relation between the setting tool output and the plug member, the outer sleeve comprising a tubular body abutting the plug in the expanded position and having protuberances thereon centering the expansible plug in the pipe string. |
