Tong for wellbore operations
AssigneeWeatherford/Lamb, Inc.
InventorsJohn Timothy Allen, Steven Anthony Box, Bernd Pietras, Jeffrey Michael Habetz
Life of this patent
Estimating the term…
Abstract
A tong as may be used for a continuous circulation system in a wellbore. The tong has a housing with a hollow interior. A plurality of spaced apart jaw assemblies reside within the housing's hollow interior for engaging a portion of a tubular to be gripped and rotated by the tong. A gear wheel is secured to the housing for rotating the housing and the jaw assemblies. The gear wheel includes a toothed outer circumference for mating with teeth of a drive shaft of a driving motor. A gear flange is movably mounted on the gear wheel such that rotation of the gear wheel does not rotate the gear flange.
Claims27
A kelly bushing, comprising:
- a base with a tubular channel therethrough from top to bottom, the base having a plurality of base axle slots,
- a roller support on the base, the roller support with a plurality of roller support axle slots,
- at least one roller having an axle with a first portion movably positioned in a corresponding roller support axle slot of the roller support so that movement of the axle there moves the at least one roller with respect to the tubular channel,
- the axle with a second portion movably positioned in a corresponding base axle slots of the base so that movement of the axle therein moves the at least one roller with respect to the tubular channel,
- a leveling bar at the top of the roller support, the roller support movable vertically by moving the leveling bar, and
- the base axle slots at an angle to the roller support axle slots so that movement of the leveling bar effects movement of the base axle slots with respect to the roller support thereby moving the at least one roller with respect to the tubular channel into and out of contact with a kelly within the tubular channel.
An apparatus for use with a torque transmission member, comprising:
- a body;
- a channel extending through the body for receiving the torque transmission member;
- one or more engagement members coupled to the body, the one or more engagement members adapted to engage the torque transmission member;
- and
- wherein the one or more engagement members is coupled to two intersecting guide members and changing a point of intersection between the two intersecting guide members causes the one or more engagement members to engage or disengage the torque transmission member.
An apparatus for use with a downhole tool, comprising:
- a kelly coupled to the downhole tool;
- and
- a kelly bushing, having:
- a body;
- a channel extending through the body for receiving the kelly;
- a roller coupled to the body, the roller adapted to engage the kelly;
- at least two intersecting guide members movably coupled to the body;
- and
- an actuating member for changing a point of intersection between the two intersecting guide members, wherein movement of the roller along the at least two intersecting guide members causes the roller to engage or disengage the kelly.
Dependencies are inferred from the claim text.