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Title: Method and apparatus for testing spotting fluids for releasing stuck drill pipe

Abstract

An apparatus is described for determining the efficacy of a spotting fluid intended to release a drill pipe which has become stuck within a borehole, the apparatus comprising: (a) an open vessel containing a drilling mud filter cake, which cake has a top surface; (b) a cylinder having an outer surface with at least a portion of the outer surface adhering to the cake and the cylinder having the axis thereof oriented parallel to the surface of the cake; (c) a spotting fluid applied to the cake surrounding the cylinder; (d) a means for applying a force perpendicular to the axis of the cylinder to separate the cylinder from the cake; and (e) a means for concurrently measuring and recording the force required to separate the cylinder from the cake.

Inventors:
Publication Date:
OSTI Identifier:
5749255
Patent Number(s):
US 4829816
Assignee:
Standard Oil Production Co., Houston, TX
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 6 Nov 1987
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; DRILL PIPES; REPAIR; WORKING FLUIDS; TESTING; FAILURES; FLUID INJECTION; NATURAL GAS WELLS; OIL WELLS; WELL SERVICING; DRILLING EQUIPMENT; EQUIPMENT; FLUIDS; PIPES; WELLS; 020300* - Petroleum- Drilling & Production; 030300 - Natural Gas- Drilling, Production, & Processing

Citation Formats

Hubbard, J C. Method and apparatus for testing spotting fluids for releasing stuck drill pipe. United States: N. p., 1989. Web.
Hubbard, J C. Method and apparatus for testing spotting fluids for releasing stuck drill pipe. United States.
Hubbard, J C. 1989. "Method and apparatus for testing spotting fluids for releasing stuck drill pipe". United States.
@article{osti_5749255,
title = {Method and apparatus for testing spotting fluids for releasing stuck drill pipe},
author = {Hubbard, J C},
abstractNote = {An apparatus is described for determining the efficacy of a spotting fluid intended to release a drill pipe which has become stuck within a borehole, the apparatus comprising: (a) an open vessel containing a drilling mud filter cake, which cake has a top surface; (b) a cylinder having an outer surface with at least a portion of the outer surface adhering to the cake and the cylinder having the axis thereof oriented parallel to the surface of the cake; (c) a spotting fluid applied to the cake surrounding the cylinder; (d) a means for applying a force perpendicular to the axis of the cylinder to separate the cylinder from the cake; and (e) a means for concurrently measuring and recording the force required to separate the cylinder from the cake.},
doi = {},
url = {https://www.osti.gov/biblio/5749255}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 16 00:00:00 EDT 1989},
month = {Tue May 16 00:00:00 EDT 1989}
}