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1. WO1995033581 - METHOD FOR REMOVING ALKALINE EARTH METAL SCALE

Publication Number WO/1995/033581
Publication Date 14.12.1995
International Application No. PCT/US1995/000525
International Filing Date 13.01.1995
Chapter 2 Demand Filed 13.10.1995
IPC
C09K 8/528 2006.01
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
52Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
528inorganic depositions, e.g. sulfates or carbonates
E21B 37/02 2006.01
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
37Methods or apparatus for cleaning boreholes or wells
02Scrapers specially adapted therefor
E21B 37/06 2006.01
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
37Methods or apparatus for cleaning boreholes or wells
06using chemical means for preventing or limiting the deposition of paraffins or like substances
CPC
C09K 8/528
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
52Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
528inorganic depositions, e.g. sulfates or carbonates
E21B 37/00
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
37Methods or apparatus for cleaning boreholes or wells
E21B 37/02
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
37Methods or apparatus for cleaning boreholes or wells
02Scrapers specially adapted therefor
E21B 37/06
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
37Methods or apparatus for cleaning boreholes or wells
06using chemical means for preventing, limiting ; or eliminating; the deposition of paraffins or like substances
Applicants
  • MOBIL OIL CORPORATION [US]/[US]
Inventors
  • PAUL, James, Mark
Agents
  • SUNG, Tak, K.
  • MILLER, Lawrence, O.
Priority Data
254,33406.06.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR REMOVING ALKALINE EARTH METAL SCALE
(FR) PROCEDE D'ELIMINATION DE DEPOTS DE METAUX ALCALINO-TERREUX
Abstract
(EN)
The present invention relates to a method of removing alkaline earth sulphate scale (22) from the interior surface of downhole production tubing (16) comprising contacting the scale (22) with a solvent having a specific gravity of at least 1.2 while simultaneously milling the scale (22) with a rotating mill head (20) connected to a downhole motor.
(FR)
L'invention porte sur un procédé d'élimination des dépôts (22) de sulfates de métaux alcalino-terreux de la surface intérieure de tubes de production (16) de forages consistant à les (22) mettre en contact avec un solvant d'une densité spécifique d'au moins 1,2 tout en les (22) meulant à l'aide d'une meule (20) rotative entraînée par un moteur de forage.
Also published as
NO19963937
Latest bibliographic data on file with the International Bureau