Wireline roller standoff
AssigneeImpact Selector International, LLC
InventorJason Allen Hradecky
Life of this patent
Estimating the term…
Abstract
Apparatus comprising a gripper operable to grip a cable extending between the Earth's surface and a downhole tool, wherein the downhole tool is suspended in a wellbore that extends from the Earth's surface to one or more subterranean formations. A body is assembled to the gripper. A plurality of rolling elements are each rotatably coupled to the body and operable to rotate relative to the body in response to contact with a sidewall of the wellbore as the body is translated along the wellbore. The body and the plurality of rolling elements collectively rotate relative to the gripper and, thus, the cable.
Claims20
A standoff for use with a cable suspending a downhole tool in a wellbore, the standoff comprising:
- a gripping insert operable to contact and grip a substantially cylindrical surface area of the cable;
- a chassis surrounding a cross-sectional circumference of the gripping insert;
- a body surrounding and rotatable around a cross-sectional circumference of the chassis;
- and
- a plurality of rolling elements each rotatably coupled to the body and operable to rotate relative to the body in response to contact with a sidewall of the wellbore as the cable and the attached standoff is translated along the wellbore;
- wherein the body and the plurality of rolling elements collectively rotate relative to the chassis and the gripping insert and, thus, the cable.
A method, comprising:
- conveying a downhole tool to a depth within a wellbore via a cable;
- then, while the downhole tool is at the depth within the wellbore:
- disposing a gripping insert around the cable such that the gripping insert surrounds a cross-sectional circumference of the cable;
- and
- then coupling a chassis and a body to the gripping insert such that the chassis surrounds a cross-sectional circumference of the gripping insert, and such that the body surrounds a cross-sectional circumference of the chassis, wherein each of a plurality of rolling elements is independently and rotatably coupled to the body;
- and
- then, by further conveying the downhole tool within the wellbore via the cable:
- rotating at least one of the plurality of rolling elements relative to the body;
- and
- collectively rotating the body and the plurality of rolling elements relative to the gripping insert and the cable.
A kit, comprising:
- a gripper operable for assembly to a cable extending between the Earth's surface and a downhole tool, wherein the downhole tool is suspended in a wellbore that extends from the Earth's surface to one or more subterranean formations;
- and
- a body operable for assembly to the gripper after the gripper is assembled to the cable, wherein:
- the gripper comprises:
- a gripping insert operable to grip a substantially cylindrical surface area of the cable;
- and
- a chassis surrounding a cross-sectional circumference of the gripping insert;
- the body comprises a plurality of rolling elements each rotatably coupled to the body;
- and
- after the body is assembled to the gripper:
- the body surrounds and is rotatable around a cross-sectional circumference of the chassis;
- the body and the plurality of rolling elements collectively rotate relative to the gripper and the cable in response to contact between a sidewall of the wellbore and at least one of the plurality of rolling elements as the cable is conveyed within the wellbore;
- and
- the plurality of rolling elements rotate relative to the body in response to contact with the sidewall of the wellbore as the cable is conveyed within the wellbore.
Dependencies are inferred from the claim text.