Wireline drilling system
AssigneeInnova Drilling and Intervention Limited
InventorRoland Wessel
Life of this patent
Estimating the term…
Abstract
A wireline drilling system for the hydrocarbon exploration and production industry incorporating a drilling cuttings removal system which acts to remove and store cuttings displaced by a drill bit during drilling operations. The cuttings removal system may employ a screw member having a tapered lower portion and a narrow upper portion to transport drilling cuttings to a cuttings basket and distribute the cuttings therein. Embodiments of the invention include an integral tractor to progress the wireline drilling system and provide weight-on-bit, as well as assist in retrieval of the wireline drilling system if the tool should become stuck.
Claims29
A wireline drilling tool comprising a drilling assembly configured to drill an extension to an existing wellbore including a drill bit configured to remove a full diameter of rock whose axis is substantially the same as that of the wellbore, and an integral cuttings removal system arranged to collect and store rock cuttings drilled by the drilling assembly for transport to the surface, the integral cuttings removal system comprising a cuttings basket to store the drilling cuttings whose volume is equal to or greater than the volume of the dilled extension and a rotatable screw member operable to carry drilling cuttings along at least a portion of the integral cuttings removal system, and an integrated downhole pump configured to circulate fluid between the drilling assembly and the rotatable screw member via one or more first inlets positioned at or near a lower portion of the screw member.
A method of drilling a wellbore, the method comprising:
- providing a wireline drilling tool comprising a drilling assembly with a drill bit and an integral cuttings removal system, the integral cuttings removal system comprising a cuttings basket and a rotatable screw member;
- running the wireline drilling tool into the wellbore;
- drilling a subterranean rock formation with the wireline drilling tool to further extend the wellbore into the subterranean rock formation;
- operating a pump of the wireline drilling tool to circulate fluid between the drilling assembly and the rotatable screw member via one or more inlets positioned at or near a lower portion of the rotatable screw member;
- operating the rotatable screw member to carry drilling cuttings along at least a portion of the integral cuttings removal system;
- and
- collecting cuttings displaced by the drilling assembly.
Dependencies are inferred from the claim text.