Inner string cementing tool

摘要

A cementing adaptor includes a cylindrical carrier carrying a casing seal, a middle interval and a lower end separated by an annular rib, and a cylindrical swivel element disposed around and coaxially rotatable relative to the middle interval. A cylindrical connector has an upper end rotatably disposed around the carrier's lower end and non-rotatably connected to the swivel element, plus a lower end connectable to an inner tubular string. With the carrier's upper end connected to a casing running tool (CRT), this assembly can be disposed within a casing string with the casing seal engaging the casing and preventing fluid flow into the casing annulus below the seal when cement is pumped down the inner string, such that the cement is urged into the wellbore annulus. The swivel connection limits torque transfer that might otherwise overload the CRT or its connection to the cementing adaptor.

主权项

1. A cementing adaptor tool comprising:
(a) an elongate cylindrical carrier having: an upper end; a middle interval; and a lower end with a cylindrical outer surface; said middle interval and said lower end being separated by an annular rib defining an upward-facing shoulder and a downward-facing shoulder; (b) a casing seal assembly associated with the upper end of the carrier; (c) a swivel element rotatably disposed about the middle interval of the carrier, said swivel element having: an upper end; a lower end with a lower end face; and an internal surface defining a downward-facing annular shoulder near the upper end of the swivel element, said internal surface having a threaded portion near the lower end of the swivel element; (d) bushing means disposed between the downward-facing annular shoulder on the swivel element and the upward-facing shoulder on the annular rib; and (e) a cylindrical connector having: an upper end defining an upward-facing annular shoulder and an outer surface threaded for engagement with the threaded portion of the swivel element; and a lower end engageable with an inner string; said upper end of the connector being coaxially, sealingly, and rotatably engageable with the lower end of the carrier, and coaxially and non-rotatably engageable with the swivel element; wherein an internal flow path extends longitudinally through the carrier and the connector.