Orientation apparatus and hole finder device for a wireline logging tool string
AssigneePetromac IP Limited
InventorStephen Peter McCormick
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a carriage apparatus for carrying a tool string down a wellbore in a wireline logging, and an orientation apparatus and hole finder device for a wireline logging tool string. In some embodiments the carriage includes a protection structure which extends longitudinally around a wheel of the apparatus to thereby prevent a side of the wheel from contacting a wall of the wellbore. In some embodiments an orientation apparatus and hole finder are arranged so that the orientation apparatus orientates the hole finder device in the wellbore so that a tip of a nose section of the hole finder is elevated above a low side of the wellbore by a height and offset from and above a longitudinal axis of the tool string.
Claims23
A sensor transportation apparatus to convey an elongate sensor assembly through a wellbore, the sensor transportation apparatus comprising:
- at least one engagement structure to connect the sensor transportation apparatus to the sensor assembly, and
- a pair of skids, and
- an orientation structure comprising at least three orientation projections, the orientation structure defining a form having a transverse outline which has a rotational centre, wherein the rotational centre is offset from a centre of mass of the elongate sensor assembly so that, in use, the sensor transportation apparatus is oriented in a most stable position with the centre of mass of the elongate sensor assembly below the rotational centre and with the pair of skids oriented to slide along a low side of the wellbore.
A guide device for guiding an elongate sensor assembly through a wellbore, the guide device comprising:
- a pair of skids,
- an orientation structure comprising at least three orientation projections, and
- a nose section with a base attached to the orientation structure, the nose section having a tip which is offset from the longitudinal axis of the elongate sensor assembly when the guide device is engaged with the elongate sensor assembly,
- wherein the orientation structure defines a form having a transverse outline which has a rotational centre, wherein the rotational centre is offset from a centre of mass of the elongate sensor assembly so that, in use, the elongate sensor assembly is oriented in a most stable position with the centre of mass of the elongate sensor assembly below the rotational centre and with the pair of skids oriented to slide along a low side of the wellbore, and with the tip of the nose section offset above the low side of the wellbore.
Dependencies are inferred from the claim text.