Method and apparatus for washing an upper completion
AssigneeConocoPhillips Company
InventorRune WOIE
Life of this patent
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Abstract
The invention relates to the cleaning of a wellbore including a reservoir liner 3 and an upper portion 2 of the wellbore, by running in only one string into the wellbore and performing a reservoir liner cementing operation, displacing the cement 7 with completion fluid 8, followed using the same string to circulate mud in the upper completion, perform an inflow test on the reservoir liner 3, wash the upper completion and displace it to completion fluid 8.
Claims9
A process for washing a wellbore, the process comprising:
- a) passing a drill string, including a reservoir liner hanger running tool, down a cased wellbore to install a reservoir liner in an uncased distal portion of the wellbore;
- b) displacing cement into the reservoir liner annulus by passing completion fluid through the drill string and reservoir liner;
- c) without first removing the drill string from the wellbore, performing an inflow test on the reservoir liner;
- and
- d) washing the interior of the casing by passing wash fluid through the drill string and into the casing, whilst rotating the drill string.
Apparatus for washing a cased wellbore comprising a drill pipe having an assembly fitted to a distal end thereof, the assembly comprising:
- a) a reservoir liner hanger and reservoir liner hanger running tool;
- and
- b) an inflow test tool capable of forming a sealed connection between the drill string and the reservoir liner or reservoir liner hanger, for performing an inflow test on the reservoir liner.
Dependencies are inferred from the claim text.