Downhole traction tool and method of use
AssigneeInnovative Drilling Systems Limited
InventorsJean Boulet, Siegfried Grabner
Life of this patent
Estimating the term…
Abstract
The invention provides a downhole borehole traction apparatus (10) and method of use. The apparatus comprises a body comprising a borehole engaging section wherein the borehole engaging section comprises an outer surface comprising at least one thread. The at least one thread comprises a crest surface (32), a leading surface (30), and a trailing surface (28) having a curvilinear shape. The at least one thread has a low pressure generation means comprising one or more formations.
Claims25
A downhole borehole traction apparatus comprising:
- a body comprising a borehole engaging section, wherein the borehole engaging section comprises an outer surface configured to contact an inner surface of a borehole, wherein at least one thread is provided on the outer surface, and wherein the at least one thread comprises:
- a crest surface;
- a leading surface;
- and
- a trailing surface having a curvilinear shape;
- wherein the at least one thread has a low pressure generation means comprising one or more formations;
- and
- wherein the crest surface of the at least one thread on the borehole engaging section is configured to engage an inner surface of the borehole.
A method of moving a work string in a borehole comprising the steps of:
- providing at least one downhole borehole traction apparatus comprising a body comprising a borehole engaging section, wherein the borehole engaging section comprises an outer surface configured to contact an inner surface of a borehole, wherein at least one thread is provided on the outer surface, and wherein the at least one thread comprises:
- a crest surface;
- a leading surface;
- and
- a trailing surface having a curvilinear shape;
- wherein the at least one thread has a low pressure generation means comprising one or more formations;
- connecting the at least one downhole borehole traction apparatus to a work string;
- rotating the work string to move the borehole engaging section such that the crest surface of the at least one thread engages the inner surface of the borehole to urge the apparatus along the inner surface of the borehole in response to rotation of the body and/or the apparatus.
Dependencies are inferred from the claim text.