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1. US20210404279 - Guided wash pipe milling

Office
United States of America
Application Number 16915092
Application Date 29.06.2020
Publication Number 20210404279
Publication Date 30.12.2021
Grant Number 11268339
Grant Date 08.03.2022
Publication Kind B2
IPC
E21B 29/06
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
29Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
06Cutting windows, e.g. directional window cutters for whipstock operations
CPC
E21B 29/06
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
29Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows
06Cutting windows, e.g. directional window cutters for whipstock operations
Applicants Halliburton Energy Services, Inc.
Inventors Benjamin Luke Butler
Aihua Liang
Loc Phuc Lang
Agents McGuireWoods LLP
Title
(EN) Guided wash pipe milling
Abstract
(EN)

Methods and apparatus for milling a window for a lateral wellbore in a casing string. An example method introduces a milling assembly into a primary wellbore, the milling assembly comprising: a whipstock, a guide bar coupled to the whipstock, and a wash pipe coupled to the guide bar. The method further includes running the milling assembly to a depth at which it is adjacent to the window in the casing string; securing the whipstock in the casing string; decoupling the wash pipe from the guide bar; guiding the wash pipe to mill the guide bar without milling the whipstock; and milling the window in the casing string with the wash pipe.


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