Patent ID: 6799633
Filing Date: 2004-10-05
Classification: B23K,E21B,G01V

Abstract:
A method of performing a task in a subterranean location in a well tubing having a main bore, the method comprising the steps of:a. installing a docking station at a downhole location in communication with the interior of the well tubing, b. locating a tractor at the docking station, the tractor comprising means to move axially within the well tubing and means to perform a task, the main bore substantially free from obstruction by the tractor while the tractor is located at the docking station, c. operating the moving means on the tractor to position the tractor assembly at a location in the well tubing where the task is to be performed, d. operating the task performing means on the tractor to perform the task, and e. thereafter, operating the moving means on the tractor to locate the tractor at the docking station.