SYSTEM AND METHOD FOR CONVEYING

摘要

A technique facilitates conveyance of equipment along a wellbore or other tubular structure. A tractor is provided with a plurality of wheels oriented to engage a surrounding wall. Rotation of the wheels drives the tractor and causes longitudinal movement of the tractor with respect to the surrounding wall via a tangential force created between each wheel and the surrounding wall. Each wheel comprises teeth having a wheel tooth geometry which enhances cooperation with the surrounding wall. For example, the wheel tooth geometry may be designed to cooperate with the tangential force to push debris out of the teeth of each wheel during rotation of the wheel along the surrounding wall. In some applications, the wheel tooth geometry is designed to present a plurality of raised, rounded surfaces which engage the surrounding wall with a low stress impact.

主权项

1. A system for conveying along a wellbore, comprising:
a tractor having a plurality of wheels oriented to engage a surrounding wellbore wall such that rotation of the plurality of wheels causes movement of the tractor with respect to the surrounding wellbore wall via a tangential force and a radial force created between each wheel and the surrounding wellbore wall, each wheel comprising teeth having a wheel tooth geometry which cooperates with the tangential force and the radial force to push debris out of the teeth during rotation of the wheel along the surrounding wellbore wall.