METHOD AND DEVICE FOR ACCIDENT-FREE RUNNING OF GEOPHYSICAL EQUIPMENT Russian patent published in 2014 - IPC E21B47/01 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to the oil producing industry and may be used at pressure transient tests, including safe delivery of a bottomhole apparatus to a required depth in a well. The method includes running of the bottomhole apparatus to the production casing at a logging cable, running of a tubing string with a deviation of a submersible pump and tubing string axis from the production casing axis. A decentraliser is installed at each pipe; the decentraliser is equipped with at least four upper and lower fins repeating the inner shape of the production casing and forming a gap for the passage of the bottomhole apparatus. The decentraliser is fixed from axial movement and is made with an inner body diameter suitable for the passage of the tubing. The bottomhole apparatus is run along the plane formed by the tubing string deviation from the axis of the production string and a gap.

EFFECT: providing free-accident running and removing of the bottomhole apparatus to the surface.

3 cl, 3 dwg