WO1995027120A1 - Rotary drill bit with improved cutter and seal protection - Google Patents

Rotary drill bit with improved cutter and seal protection Download PDF

Info

Publication number
WO1995027120A1
WO1995027120A1 PCT/US1995/003994 US9503994W WO9527120A1 WO 1995027120 A1 WO1995027120 A1 WO 1995027120A1 US 9503994 W US9503994 W US 9503994W WO 9527120 A1 WO9527120 A1 WO 9527120A1
Authority
WO
WIPO (PCT)
Prior art keywords
spindle
generally cylindrical
drill bit
sealing surface
rotary drill
Prior art date
Application number
PCT/US1995/003994
Other languages
French (fr)
Inventor
Mark Philip Blackman
Jay Stuart Bird
Michael Steve Beaton
Original Assignee
Dresser Industries, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dresser Industries, Inc. filed Critical Dresser Industries, Inc.
Priority to EP95914221A priority Critical patent/EP0753093A4/en
Priority to AU21309/95A priority patent/AU2130995A/en
Publication of WO1995027120A1 publication Critical patent/WO1995027120A1/en
Priority to MXPA/A/1996/004451A priority patent/MXPA96004451A/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/22—Roller bits characterised by bearing, lubrication or sealing details
    • E21B10/25—Roller bits characterised by bearing, lubrication or sealing details characterised by sealing details
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type

Abstract

A rotary cone bit (10) for forming a borehole having a body with an underside (15) and an upper portion adapted (20) for connection to a drill string. The drill bit (10) rotates around a central axis (26) of the body. A number of angularly-spaced arms (21) are integrally formed with the body and depend therefrom. Each arm (21) has an inside surface (24) with a spindle (23) connected thereto and an outer shirttail surface (25). Each spindle (23) projects generally downwardly and inwardly with respect to the central axis (26), has a generally cylindrical upper end portion connected to the inside surface (24), and has an inner sealing surface within the upper end portion. A number of rotary cone cutters (11) equal to the number of arms (21) are each mounted on one of the spindles (23). Each of the cutters (11) includes an internal generally cylindrical wall defining a cavity (36) for receiving the spindle (23), a gap (41) with a generally cylindrical first portion defined between the spindle (23) and cavity wall, an outer sealing surface in the cavity wall concentric with the inner sealing surface, and a seal element (43) spanning the gap (41) and sealing between the inner and outer sealing surfaces.
PCT/US1995/003994 1994-03-31 1995-03-31 Rotary drill bit with improved cutter and seal protection WO1995027120A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP95914221A EP0753093A4 (en) 1994-03-31 1995-03-31 Rotary drill bit with improved cutter and seal protection
AU21309/95A AU2130995A (en) 1994-03-31 1995-03-31 Rotary drill bit with improved cutter and seal protection
MXPA/A/1996/004451A MXPA96004451A (en) 1994-03-31 1996-09-30 Rotating barrena with improved protection of transversal diaclase and se

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/221,841 1994-03-31
US08/221,841 US5452771A (en) 1994-03-31 1994-03-31 Rotary drill bit with improved cutter and seal protection

Publications (1)

Publication Number Publication Date
WO1995027120A1 true WO1995027120A1 (en) 1995-10-12

Family

ID=22829631

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/003994 WO1995027120A1 (en) 1994-03-31 1995-03-31 Rotary drill bit with improved cutter and seal protection

Country Status (5)

Country Link
US (2) US5452771A (en)
EP (1) EP0753093A4 (en)
CN (1) CN1051596C (en)
AU (1) AU2130995A (en)
WO (1) WO1995027120A1 (en)

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Also Published As

Publication number Publication date
CN1051596C (en) 2000-04-19
CN1147285A (en) 1997-04-09
US5452771A (en) 1995-09-26
AU2130995A (en) 1995-10-23
EP0753093A1 (en) 1997-01-15
US5518077A (en) 1996-05-21
MX9604451A (en) 1997-07-31
EP0753093A4 (en) 2000-03-08

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