GB486700A - Improvements relating to core drills for well drilling - Google Patents
Improvements relating to core drills for well drillingInfo
- Publication number
- GB486700A GB486700A GB16632/37A GB1663237A GB486700A GB 486700 A GB486700 A GB 486700A GB 16632/37 A GB16632/37 A GB 16632/37A GB 1663237 A GB1663237 A GB 1663237A GB 486700 A GB486700 A GB 486700A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- passage
- well drilling
- core barrel
- barrel
- 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
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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
Abstract
486,700. Well drilling. ELLIOTT CORE DRILLING CO. June 15, 1937, No. 16632. Convention date, July 28, 1936. [Class 85] In a core drill for well drilling with an outer barrel 11 surrounding the core barrel 20, an elongated member 30 is threaded to the core barrel and has a Venturi-passage 31 through which the flushing fluid flows; a suction passage 45 leads from the vent valve 57 of the core barrel to the throat 50 of the Venturipassage, whereby pressure in the core barrel is relieved. The passage 45 may be formed by welding a plate 58 over a groove. Packings such as 41, 42, surround the member 30. In another form, the Venturi-passage is offset from the axis of the member 30 and discharges only to one side of the member, a skirt surrounding the discharge. U.S.A. Specifications 1,629,026 and 1,669,098 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US486700XA | 1936-07-28 | 1936-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB486700A true GB486700A (en) | 1938-06-09 |
Family
ID=21955797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16632/37A Expired GB486700A (en) | 1936-07-28 | 1937-06-15 | Improvements relating to core drills for well drilling |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB486700A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999002816A1 (en) * | 1997-07-08 | 1999-01-21 | Dresser Industries Inc. | Core barrel |
-
1937
- 1937-06-15 GB GB16632/37A patent/GB486700A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999002816A1 (en) * | 1997-07-08 | 1999-01-21 | Dresser Industries Inc. | Core barrel |
| BE1011266A3 (en) * | 1997-07-08 | 1999-07-06 | Dresser Ind | Core. |
| US6341656B1 (en) | 1997-07-08 | 2002-01-29 | Dresser Industries, Inc. | Core barrel |
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