Well entry tool
OwnerKenneth Mackintoshinventor
Life of this patent
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Abstract
A well entry tool includes an upper tubular member (10) and a lower tubular member (14) connected together by an intermediate assembly. The upper and lower tubular members (10, 14) are provided with outer end portions (12, 16) for connection of the tool in a drill string for fluid flow through the tool. The intermediate assembly includes a hollow body (18) which includes aligned, spaced bearings (30) receiving the upper and lower tubular members (10, 14) to provide rotation of the tubular members (10, 14) relative to the hollow body (18). A power transmission device is provided within the hollow body (18) for transmitting torque from the upper tubular member (10) to the lower tubular member (14) and an entry device (42) permits a wire or similar flexible member to pass sealingly from the exterior to the interior of the hollow body (18).
Claims17
A well entry tool comprises an upper tubular member and a lower tubular member connected together by an intermediate assembly;
- the upper and lower tubular members being provided with outer end portions for connection of the tool in a drill string for fluid flow therethrough;
- the intermediate assembly comprising a hollow body including axially aligned, spaced bearing devices receiving the upper and lower tubular members to provide rotation of the tubular members relative to the hollow body, a power transmission mechanism within the hollow body for transmitting torque from the upper tubular member to the lower tubular member, and an entry device allowing a flexible elongate member to pass sealingly from the exterior to the interior of the hollow body.
A well entry tool according to 2, wherein a respective intermediate layshaft is associated with each primary layshaft, the intermediate layshafts providing an additional cog which intercouples one of the respective annular cogs to respective meshing cogs, whereby the upper and lower tubular members rotate in opposite directions.
A grease tube for sealing against a wireline entering a borehole, the borehole having a central bore, the grease tube comprising two longitudinal halves reasonably secured together by inter-engageable lugs and slots to define a passage for passing of the wireline through the bore of the borehole.
Dependencies are inferred from the claim text.