GB1231556A - - Google Patents
Info
- Publication number
- GB1231556A GB1231556A GB1231556DA GB1231556A GB 1231556 A GB1231556 A GB 1231556A GB 1231556D A GB1231556D A GB 1231556DA GB 1231556 A GB1231556 A GB 1231556A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bit
- inner bit
- drilling
- expelled
- feb
- 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
Links
- 238000005553 drilling Methods 0.000 abstract 3
- 239000011435 rock Substances 0.000 abstract 1
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
- E21B10/36—Percussion drill bits
- E21B10/40—Percussion drill bits with leading portion
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
1,231,556. Boring earth. NYA ASFALT A.B. 9 Feb., 1970 [28 Feb., 1969], No. 6102/70. Heading E1F. Drilling equipment, especially for drilling in earth or loose rock comprises an inner bit 6, an outer ring-shaped drill bit 5, and a casing pipe 1 connected to the outer bit, the inner bit being detachably connected to the outer bit so that on the one hand the casing pipe can transmit impact and rotation forces to both bits, and on the other hand the inner bit can be expelled from the outer bit whilst in the hole being bored. As shown the inner bit is frictionally held in the outer bit and can be expelled by means of a rod inserted through the casing or by establishing an overpressure in the pipe. Alternatively the bits may be connected by threads or bayonet means. The inner bit may have. upwardly extending part connectable by threads or bayonet means to a drill stem so that the drilling may continue with the inner bit only.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE02841/69A SE329138B (en) | 1969-02-28 | 1969-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1231556A true GB1231556A (en) | 1971-05-12 |
Family
ID=20260825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1231556D Expired GB1231556A (en) | 1969-02-28 | 1970-02-09 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3722610A (en) |
| AT (1) | AT296920B (en) |
| DE (1) | DE2007691A1 (en) |
| FR (1) | FR2033069A5 (en) |
| GB (1) | GB1231556A (en) |
| SE (1) | SE329138B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9401528U1 (en) * | 1994-01-26 | 1994-05-19 | Gartec Geo- Und Umwelttechnik Gmbh, 03253 Doberlug-Kirchhain | Drill bits for the production of pilot holes for drillings and the like. |
| US7610970B2 (en) * | 2006-12-07 | 2009-11-03 | Schlumberger Technology Corporation | Apparatus for eliminating net drill bit torque and controlling drill bit walk |
| CN114382434B (en) * | 2021-12-22 | 2023-07-14 | 中国石油大学(华东) | Surface conduit self-drilling well cementation device and method for deep water |
-
1969
- 1969-02-28 SE SE02841/69A patent/SE329138B/xx unknown
-
1970
- 1970-02-09 GB GB1231556D patent/GB1231556A/en not_active Expired
- 1970-02-17 US US00011955A patent/US3722610A/en not_active Expired - Lifetime
- 1970-02-19 DE DE19702007691 patent/DE2007691A1/en active Pending
- 1970-02-24 AT AT167670A patent/AT296920B/en not_active IP Right Cessation
- 1970-02-25 FR FR7006807A patent/FR2033069A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2033069A5 (en) | 1970-11-27 |
| US3722610A (en) | 1973-03-27 |
| AT296920B (en) | 1972-03-10 |
| SE329138B (en) | 1970-10-05 |
| DE2007691A1 (en) | 1970-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |