Running and cementing tubing

摘要

A method of running a bore-lining tubing string into a bore includes running a tubing string, typically a liner string, into a bore while agitating the string. The agitation may also take place while the tubing is being cemented in the bore. Pressure pulses may be applied to fluid in the bore, which fluid may be cement slurry.

主权项

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.