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1. WO1996004458 - EROSION RESISTANT DOWNHOLE MUD DIVERTER TOOL

Publication Number WO/1996/004458
Publication Date 15.02.1996
International Application No. PCT/GB1995/001817
International Filing Date 01.08.1995
Chapter 2 Demand Filed 29.02.1996
IPC
E21B 21/00 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
21Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
E21B 21/10 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
21Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
10Valves arrangements in drilling-fluid circulation systems
F16K 15/06 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
15Check valves
02with guided rigid valve members
06with guided stems
CPC
E21B 21/00
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
21Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
E21B 21/103
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
21Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
10Valves arrangements in drilling fluid circulation systems
103Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus
F16K 15/063
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
15Check valves
02with guided rigid valve members
06with guided stems
063the valve being loaded by a helicoidal spring
Applicants
  • STEWART, Arthur, Deacey [GB/GB]; GB
  • CRAIG, Mark, William [GB/GB]; GB
Inventors
  • STEWART, Arthur, Deacey; GB
  • CRAIG, Mark, William; GB
Agents
  • MURGITROYD & COMPANY; 373 Scotland Street Glasgow G5 8QA, GB
Priority Data
9415500.901.08.1994GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) EROSION RESISTANT DOWNHOLE MUD DIVERTER TOOL
(FR) OUTIL DEFLECTEUR DE BOUE DE FORAGE RESISTANT A L'EROSION
Abstract
(EN)
An erosion resistant downhole diverter tool (210) comprises a generally cylindrical body (212) which may be configured as a slick sub or may include stabilising blades (260). Located within the body (212) are a plurality of erosion-resistant, removable, cylindrical inserts (220). Each insert has an aperture (222) formed therein, aligned with a corresponding aperture (218) formed in the cylindrical body (212). Located within the apertures (218) in the cylindrical body (212) are pressure responsive, normally-closed valve assemblies (300), incorporating jet nozzles, which open in response to increased fluid pressure within the tool to provide fluid jets directed into the annulus surrounding the tool in a borehole or the like. The upper ends of the stabiliser blades (260) may include cutting structures to provide a back-reaming function. In alternative embodiments, the valve assemblies are omitted and replaced by simple jet nozzles, and the interior of the inserts is configured to promote fluid flow through the nozzles without increased fluid pressure. The inserts and nozzle components in contact with fluid are formed from erosion-resistant material. The tool allows fluid diversion functions to be performed without interrupting drilling operations.
(FR)
Un outil déflecteur de forage résistant à l'érosion (210) comprend un corps généralement cylindrique (212) pouvant se présenter sous l'aspect d'une tige lisse rétrécie ou comprendre des palettes de stabilisation (260). A l'intérieur du corps (212) se trouvent une pluralité d'éléments rapportés cylindriques, amovibles et résistants à l'érosion (220). Chaque élément rapporté possède une ouverture (222) alignée sur une ouverture correspondante (218) située dans le corps cylindrique (212). A l'intérieur des ouvertures (218) du corps cylindrique (212) se trouvent des ensembles soupapes normalement fermés et sensibles à la pression (300), incorporant des ajutages et s'ouvrant sous l'effet d'une augmentation de la pression du liquide à l'intérieur de l'outil, afin de diriger des jets de liquide vers l'intérieur de l'espace annulaire entourant l'outil dans un puits de forage, par exemple. Les extrémités supérieures des palettes de stabilisation (260) peuvent comporter des structures coupantes permettant de remplir une fonction d'alésage vers l'arrière. Dans d'autres modes de réalisation, les ensembles soupapes sont absents et remplacés par des ajutages simples et l'intérieur des éléments rapportés est conçu pour provoquer l'écoulement du liquide à travers les ajutages sans augmentation de la pression du liquide. Les éléments rapportés et les éléments d'ajutage en contact avec le liquide sont fabriqués en un matériau résistant à l'érosion. Cet outil permet de remplir des fonctions de dérivation du liquide sans interrompre les opérations de forage.
Also published as
NO19970434
Latest bibliographic data on file with the International Bureau