Patent ID: 9637991
Date: 2017-05-02
CPC Classifications: E21B

Claim:
1. A method of running a bore-lining tubing string into a bore, the method comprising: drilling a bore using a drill string; running a bore-lining tubing string into the pre-drilled bore while producing pressure pulses directly in a fluid pumped through a throughbore of the bore-lining tubing string with a valve positioned in fluid communication with the fluid in the bore-lining tubing string and then transmitting the pressure pulses from the valve axially through the fluid in the throughbore of the bore-lining tubing string to agitate the bore-lining tubing string, the valve including a first valve plate and a second valve late; wherein said pressure pulses are produced by translating the first valve plate relative to the second valve plate in a plane that is perpendicular to a central axis of the bore-lining tubing string to vary a dimension of a fluid passage extending through the first valve plate and the second valve plate, wherein the first valve plate is driven by a rotor of a motor, and wherein the pressure pulses are produced whilst the bore-lining tubing string is being translated axially into the pre-drilled bore during the running of the bore-lining tubing string into the pre-drilled bore; reducing the friction between the bore-lining tubing string and the pre-drilled bore wall using said agitation of the bore-lining tubing string, to facilitate the translation of the bore-lining tubing string into the pre-drilled bore to line the drilled bore with bore-lining tubing; and lining the bore with the bore-lining tubing that has been run in.