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US 2017/0254147 A1Published application
Top drive for a drilling rig
AssigneeMhwirth AS
InventorSTIAN LANTZ
Life of this patent
Estimating the term…
Abstract
A top drive for a drilling rig includes a top drive housing, a threaded element used in a drilling operation, the threaded element having a grooved surface, and a back-up wrench with a toothed surface which engages with the grooved surface of the threaded element. The back-up wrench is suspended from the top drive housing. The back-up wrench is movable in relation to the top drive housing so as to selectively engage the threaded element.
Claims15
A top drive for a drilling rig, the top drive comprising:
- a top drive housing;
- a threaded element used in a drilling operation, the threaded element comprising a grooved surface;
- and
- a back-up wrench comprising a toothed surface which is configured to engage with the grooved surface of the threaded element,
- wherein,
- the back-up wrench is suspended from the top drive housing, and
- the back-up wrench is configured to be movable in relation to the top drive housing so as to selectively engage the threaded element.
4 more elements
A top drive for a drilling rig, the top drive having a central longitudinal axis and comprising:
- a top drive housing;
- a pivotable coupling;
- a first suspension element;
- a second suspension element;
- a back-up wrench which is suspended from the top drive housing via the first suspension element, the second suspension element, and the pivotable coupling;
- and
- a releasable coupling arranged between the first suspension element and the back-up wrench and via which the back-up wrench is fully disconnectable from the first suspension element,
- wherein,
- the pivotable coupling is configured to allow a pivoting of the back-up wrench in a plane which is substantially perpendicular to the central longitudinal axis when the back-up wrench is disconnected from the first suspension element.
6 more elements
Dependencies are inferred from the claim text.