Downhole device
AssigneeWireline Engineering Limited
InventorRobert Neil Hall
Life of this patent
Estimating the term…
Abstract
The invention relates to a downhole device for incorporation into a downhole string and movement in a wellbore. The device comprises a body member, at least one roller arranged on the device to engage the inner surface of the wellbore and means to orient the device in the wellbore. The means to orient the device are provided on the or each roller. Preferably the means to orient the device comprise a projecting portion provided on the or each roller which projects radially outwardly from the body member. The projecting portion can be an eccentrically-shaped portion of the or each roller.
Claims18
A downhole device for incorporation into a downhole string and movement in a well-bore, the device comprising:
- a body member having a central longitudinal axis;
- at least one roller arranged on the device to engage an inner surface of the well-bore, the at least one roller comprising a running edge extending around an outer circumference of the roller and a portion configured to orient the device in the wellbore, the roller having a rotational axis perpendicular to and extending through the central longitudinal axis of the body member and perpendicular to the circumferential running edge, the roller being mounted on the device so as to permit the roller to rotate about its rotational axis relative to the body member;
- and
- wherein the portion of the roller configured to orient the device comprises a projecting portion of the roller which projects radially outwardly from the body member in a direction of the rotation axis of the roller, the projecting portion of the roller is shaped such that the projecting portion of the roller is eccentric to the body member.
A downhole device for incorporation into a downhole string and movement in a well-bore, the device comprising:
- a body member having a central longitudinal axis;
- at least one roller arranged mounted to the body member and configured to engage an inner surface of the well-bore, the at least one roller comprising a running edge extending around an outer circumference of the roller and a portion configured to orient the device in the wellbore, the roller having a rotational axis perpendicular to and extending through the central longitudinal axis of the body member and perpendicular to the circumferential running edge, the roller being mounted on the device so as to permit the roller to rotate about its rotational axis relative to the body member, the roller mounted to the member such that the portion of the roller configured to orient the device is eccentric to the body member.
Dependencies are inferred from the claim text.