GB716761A - Improvements in or relating to drill assemblies - Google Patents

Improvements in or relating to drill assemblies

Info

Publication number
GB716761A
GB716761A GB2801952A GB2801952A GB716761A GB 716761 A GB716761 A GB 716761A GB 2801952 A GB2801952 A GB 2801952A GB 2801952 A GB2801952 A GB 2801952A GB 716761 A GB716761 A GB 716761A
Authority
GB
United Kingdom
Prior art keywords
drill
mandrel
latches
members
string
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB2801952A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Standard Oil Development Co
Original Assignee
Standard Oil Development Co
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
Priority to US716761XA priority Critical
Application filed by Standard Oil Development Co filed Critical Standard Oil Development Co
Publication of GB716761A publication Critical patent/GB716761A/en
Application status is Expired legal-status Critical

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/64Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
    • E21B10/66Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe the cutting element movable through the drilling pipe and laterally shiftable
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/26Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • E21B10/34Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools of roller-cutter type

Abstract

716,761. Earth-boring apparatus. STANDARD OIL DEVELOPMENT CO. Nov. 6, 1952 [Jan. 29, 1952], No. 28019/52. Class 85. Secured to the lower end of a rotatable string of drill pipe or casing is a collar 1 adapted to receive a drill which is passed through the drill string, the bore of the collar being formed with grooves 4, 5 and an outward taper 3. The drill consists of a mandrel 8 having spring-biased latches 30 at the upper end, a tapered lower end and two or more, preferably three, longitudinal grooves. In each groove slide a member 13, 14 having a spring-biased latch 6 at the upper end and, at the lower end a flexible suspension arm 15 on which is pivotally mounted a cutter support. To remove the drill from the operating position, as shown in Fig. 1, a spearhead is lowered down the drill string to contact latches 30 and disengage and maintain them clear of the groove 4 and the interior of the drill string. The spearhead is then raised, so drawing up the mandrel 8 to thus remove the tapered lower end of it from out of contact with the cutter supports. The members 13, 14 remain stationary with respect to the collar owing to the frictional engagement of the latches therewith until abutments 24, 26 on the mandrel engage abutments 23, 25 on said members 13, 14. Subsequent upward movement of the mandrel results in withdrawal of the drill through the drill string. The abutments 23, 25 are disposed at different distances from the upper ends of members 13, 14 respectively so that the members 13, 14 start to move upwards in a controlled sequence. To set the drill, it is lowered through the string. Latches 6 move out into the groove 5 to prevent further downward movement of the members 13, 14 whilst the mandrel 8 continues to move downwards until its tapered nose has wedged the cutter supports against the taper 3 of the bore of the collar. At this point latches 30 move out into grooves 4 to prevent upward movement of the drill when the weight of the drill string is transferred to the cutters to rotate them. In a modified form the latches 30 have an adjustable mounting on the mandrel, the mounting being used to set a packer sleeve when the drill is in position. A single groove of suitable dimensions may replace the grooves 4. 5.
GB2801952A 1952-01-29 1952-11-06 Improvements in or relating to drill assemblies Expired GB716761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US716761XA true 1952-01-29 1952-01-29

Publications (1)

Publication Number Publication Date
GB716761A true GB716761A (en) 1954-10-13

Family

ID=22102865

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2801952A Expired GB716761A (en) 1952-01-29 1952-11-06 Improvements in or relating to drill assemblies

Country Status (1)

Country Link
GB (1) GB716761A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004079151A2 (en) * 2003-03-05 2004-09-16 Weatherford/Lamb, Inc. Drilling with casing latch
US7650944B1 (en) 2003-07-11 2010-01-26 Weatherford/Lamb, Inc. Vessel for well intervention
US7712523B2 (en) 2000-04-17 2010-05-11 Weatherford/Lamb, Inc. Top drive casing system
US7730965B2 (en) 2002-12-13 2010-06-08 Weatherford/Lamb, Inc. Retractable joint and cementing shoe for use in completing a wellbore
US7857052B2 (en) 2006-05-12 2010-12-28 Weatherford/Lamb, Inc. Stage cementing methods used in casing while drilling
US7938201B2 (en) 2002-12-13 2011-05-10 Weatherford/Lamb, Inc. Deep water drilling with casing
USRE42877E1 (en) 2003-02-07 2011-11-01 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
US8276689B2 (en) 2006-05-22 2012-10-02 Weatherford/Lamb, Inc. Methods and apparatus for drilling with casing

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7712523B2 (en) 2000-04-17 2010-05-11 Weatherford/Lamb, Inc. Top drive casing system
US7730965B2 (en) 2002-12-13 2010-06-08 Weatherford/Lamb, Inc. Retractable joint and cementing shoe for use in completing a wellbore
US7938201B2 (en) 2002-12-13 2011-05-10 Weatherford/Lamb, Inc. Deep water drilling with casing
USRE42877E1 (en) 2003-02-07 2011-11-01 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
WO2004079151A3 (en) * 2003-03-05 2005-01-20 Richard L Giroux Drilling with casing latch
WO2004079151A2 (en) * 2003-03-05 2004-09-16 Weatherford/Lamb, Inc. Drilling with casing latch
GB2416360A (en) * 2003-03-05 2006-01-25 Weatherford Lamb Drilling with casing latch
GB2416360B (en) * 2003-03-05 2007-08-22 Weatherford Lamb Drilling with casing latch
US7650944B1 (en) 2003-07-11 2010-01-26 Weatherford/Lamb, Inc. Vessel for well intervention
US7857052B2 (en) 2006-05-12 2010-12-28 Weatherford/Lamb, Inc. Stage cementing methods used in casing while drilling
US8276689B2 (en) 2006-05-22 2012-10-02 Weatherford/Lamb, Inc. Methods and apparatus for drilling with casing

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