GB8623427D0 - Rotary drill bits - Google Patents

Rotary drill bits

Info

Publication number: GB8623427D0
Authority: GB; United Kingdom
Prior art keywords: drill bits; rotary drill; rotary; bits; drill
Prior art date: 1985-10-01
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.): Granted

Application number

GB868623427A

Other versions

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.)

NL Petroleum Products Ltd

Original Assignee

NL Petroleum Products Ltd

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.)

1985-10-01

Filing date

1986-09-30

Publication date

1986-11-05

1985-10-01 Priority claimed from GB858524146A external-priority patent/GB8524146D0/en

1986-09-30 Application filed by NL Petroleum Products Ltd filed Critical NL Petroleum Products Ltd

1986-09-30 Priority to GB08623427A priority Critical patent/GB2181173B/en

1986-11-05 Publication of GB8623427D0 publication Critical patent/GB8623427D0/en

1987-04-15 Publication of GB2181173A publication Critical patent/GB2181173A/en

1988-12-21 Application granted granted Critical

1988-12-21 Publication of GB2181173B publication Critical patent/GB2181173B/en

Status Expired legal-status Critical Current

Classifications

- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B10/56—Button-type inserts
- E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts

Landscapes

Engineering & Computer Science (AREA)
Geology (AREA)
Life Sciences & Earth Sciences (AREA)
Mining & Mineral Resources (AREA)
Physics & Mathematics (AREA)
Environmental & Geological Engineering (AREA)
Fluid Mechanics (AREA)
Mechanical Engineering (AREA)
General Life Sciences & Earth Sciences (AREA)
Geochemistry & Mineralogy (AREA)
Chemical & Material Sciences (AREA)
Crystallography & Structural Chemistry (AREA)
Drilling Tools (AREA)

GB08623427A 1985-10-01 1986-09-30 Improvements in or relating to rotary drill bits Expired GB2181173B (en)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
GB08623427A GB2181173B (en)	1985-10-01	1986-09-30	Improvements in or relating to rotary drill bits

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GB858524146A GB8524146D0 (en)	1985-10-01	1985-10-01	Rotary drill bits
GB08623427A GB2181173B (en)	1985-10-01	1986-09-30	Improvements in or relating to rotary drill bits

Publications (3)

Publication Number	Publication Date
GB8623427D0 true GB8623427D0 (en)	1986-11-05
GB2181173A GB2181173A (en)	1987-04-15
GB2181173B GB2181173B (en)	1988-12-21

Family

ID=26289827

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB08623427A Expired GB2181173B (en)	1985-10-01	1986-09-30	Improvements in or relating to rotary drill bits

Country Status (1)

Country	Link
GB (1)	GB2181173B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3852286T2 (en) *	1987-10-13	1995-06-22	Eastman Teleco Co	Milling chisel with nozzles for drilling plastic formations.
US4883132A (en) *	1987-10-13	1989-11-28	Eastman Christensen	Drag bit for drilling in plastic formation with maximum chip clearance and hydraulic for direct chip impingement
US5651420A (en) *	1995-03-17	1997-07-29	Baker Hughes, Inc.	Drilling apparatus with dynamic cuttings removal and cleaning
US5904213A (en) *	1995-10-10	1999-05-18	Camco International (Uk) Limited	Rotary drill bits

1986
- 1986-09-30 GB GB08623427A patent/GB2181173B/en not_active Expired

Also Published As

Publication number	Publication date
GB2181173A (en)	1987-04-15
GB2181173B (en)	1988-12-21

Publication	Publication Date	Title
GB8501702D0 (en)	1985-02-27	Rotary drill bits
GB8508621D0 (en)	1985-05-09	Rotary drill bits
GB8528894D0 (en)	1986-01-02	Rotary drill bits
GB8524146D0 (en)	1985-11-06	Rotary drill bits
GB2188354B (en)	1989-11-22	Rotary drill bit
GB8517276D0 (en)	1985-08-14	Rotary drill bits
GB8626919D0 (en)	1986-12-10	Rotary drill bits
GB8710876D0 (en)	1987-06-10	Rotary drill bits
EP0239178A3 (en)	1988-12-07	Rotary drill bit
GB8727205D0 (en)	1987-12-23	Rotary drill bits
GB8503463D0 (en)	1985-03-13	Rotary drill bits
GB8405267D0 (en)	1984-04-04	Rotary drill bit
GB8611448D0 (en)	1986-06-18	Rotary drill bits
GB8711255D0 (en)	1987-06-17	Rotary drill bits
GB8510494D0 (en)	1985-05-30	Rotary drill bits
ZA853605B (en)	1985-12-24	Rotary drill bit
GB8418482D0 (en)	1984-08-22	Rotary drill bits
GB2152557B (en)	1986-07-09	Rotary drill bit
DE3567054D1 (en)	1989-02-02	Rotary drill bit
GB8627050D0 (en)	1986-12-10	Rotary drill bits
GB8505244D0 (en)	1985-04-03	Rotary drill bits
GB8516776D0 (en)	1985-08-07	Rotary drill bits
EP0187971A3 (en)	1987-08-19	Drill bit
GB8611449D0 (en)	1986-06-18	Rotary drill bits
GB8618457D0 (en)	1986-09-03	Drill bit

Legal Events

Date	Code	Title	Description
1995-05-24	PCNP	Patent ceased through non-payment of renewal fee	Effective date: 19940930