US1797550A - Core catcher - Google Patents
Core catcher Download PDFInfo
- Publication number
- US1797550A US1797550A US351688A US35168829A US1797550A US 1797550 A US1797550 A US 1797550A US 351688 A US351688 A US 351688A US 35168829 A US35168829 A US 35168829A US 1797550 A US1797550 A US 1797550A
- Authority
- US
- United States
- Prior art keywords
- core
- fingers
- catcher
- long
- core catcher
- 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 - Lifetime
Links
- 230000015572 biosynthetic process Effects 0.000 description 14
- 238000005755 formation reaction Methods 0.000 description 14
- 208000029278 non-syndromic brachydactyly of fingers Diseases 0.000 description 5
- 206010010071 Coma Diseases 0.000 description 1
- 101100202589 Drosophila melanogaster scrib gene Proteins 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/10—Formed core retaining or severing means
Definitions
- paratus and more particularly to core capchers for core drills.
- Another object is to provide a new and improved core engaging spring finger mounting.
- a sectional elevation thereof a fragmentary sectional includes a plurality of short spring fingers 1 1, and a plurality of long spring fingers 2,
- the inner ring 3 is externally beveled
- Fig. 1 is, a top plan view of the preferred embodiment bottQm i mdlcated- 1.
- the long fingers 1 When a soft formation has been drilled, and'the drill is elevated, the long fingers 1 will move inwardly to hold the soft formation core 7 within the core barrel 8, as illustrated by Fig. 3.
- the short fingers may be so disposed that, in that event, they will move inwardly to assist the long fingers.
- a core catcher having relatively long fingers capable of holding a soft forma tion core and also satisfactorily adapted to sustain a hard formation core, the latter of which may comprise solid rock of sufiicient weight to bend and break long fingers.
- my new and improved-core catcher comprises few parts characterized by simplicity and strength, and adapted to hold'either a hard or a soft formation core.
- a core catcher haviiig core engaging long fingers being of a length greater than the radius of said barrel.
- a core drill having a core barrel, and a. core catcher within said barrel, said catcher having upwardly and inwardly presented, long and short core engaging fingers, said long fingers belng of a length greater than the radius of said barrel, and said short fingers being substantially one-half as long as said long fingers.
- a core catcher having a ring, long and short fingers carried by said ring and inclined toward the axis of said ring, said long fingers being of a length greater than the radius of said ring.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Description
March 24, 1931. H K 1,797,550
' coma CATCHER Filed April 1. 1929 Fig.4.
Per 6 Hammer INVENTOR WRNEW I) carried by the rings 3 and 4.
Patented Mar. 24, 1931 UNITED STATES [PATENT OFFICE REX G. 3MB, 01 HOUSTON, TEXAS, ASSIGNOB TO REED ROLLER BIT COMPLNY,
I O1? HOUSTON, TEXAS, A CORPORATION OF TEXAS .coan ca'rcnna Application 1113a April 1,
paratus, and more particularly to core capchers for core drills.
There are two types of core catchers now 5 in common use.that adapted to hold a hard formation core, and that adapted to hold a soft formation core. And if a core drill equipped with a hard formation core catcher passes through soft formation, the soft formation core will not be held, and vice versa. This invention has for one of its objects the provision of a new and improved core catcher adapted to hold both hard and soft formation cores.
Another object is to provide a new and improved core engaging spring finger mounting.
of the core catcher; Fig. 2, a sectional elevation thereof; Fig. 3, a fragmentary sectional includes a plurality of short spring fingers 1 1, and a plurality of long spring fingers 2,
' The inner ring 3 is externally beveled, and
the outer ring 4 is internally beveled to form upwardly and' inwardly inclined meeting faces, indicated at 5, the spring fingersl and 2 being held therebetween. The rings are preferably welded at the It will be obvious to those skilled in the vart thatthe rings-Sand 4, welded together at the bottom, provide a strong and rigid-support for 'thespring fingers without weakening them. The boring of riyet holes and in- -judicious welding has heretofore produced weakened fingers incapable of withstanding the strains to which they are necessarilysubjectedin deep well core drilling operations. When a core drill equipped with my new and improved-core catcher passes through i any formation, both the long and short In the accompanying drawings Fig. 1 is, a top plan view of the preferred embodiment bottQm i mdlcated- 1. A core catcher 1929. Serial No. 351,688
spring fingers will move out of the path of the inwardly'moving core.
When a soft formation has been drilled, and'the drill is elevated, the long fingers 1 will move inwardly to hold the soft formation core 7 within the core barrel 8, as illustrated by Fig. 3. The short fingers may be so disposed that, in that event, they will move inwardly to assist the long fingers.
It is a difficult, if notimpossible, matter to construct a core catcher having relatively long fingers capable of holding a soft forma tion core and also satisfactorily adapted to sustain a hard formation core, the latter of which may comprise solid rock of sufiicient weight to bend and break long fingers. On
the other hand short fingers, while incapable of holding very soft formation cores, possesses great strength and are capable of sustaining heavy hard cores.
Now when the drill is elevated after penetrating a hard formation, the strongand relatively short fingers 1 of my core catcher move inwardly into engagement with the hard core 9, as illustrated by Fig. 4; and firmly support the same in the core barrel 8.
It will be apparent from the foregoing that my new and improved-core catcher comprises few parts characterized by simplicity and strength, and adapted to hold'either a hard or a soft formation core.
My invention is not limited to the specific embodiment shown.
Various changes may be made within the scope of the following claims.
'Iclaim:
having core engaging fingers and a pair ofsupporting rings,'said fingers being held between said rings, and extending upwardly, said rings being welded together atthe bottom.-
2; A core catcher haviiig core engaging long fingers being of a length greater than the radius of said barrel.
4. A core drill having a core barrel, and a. core catcher within said barrel, said catcher having upwardly and inwardly presented, long and short core engaging fingers, said long fingers belng of a length greater than the radius of said barrel, and said short fingers being substantially one-half as long as said long fingers.
5. A core catcher having a ring, long and short fingers carried by said ring and inclined toward the axis of said ring, said long fingers being of a length greater than the radius of said ring.
In testimony whereof, I hereunto aflix my signature.
' REX G. HAMAKER.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US351688A US1797550A (en) | 1929-04-01 | 1929-04-01 | Core catcher |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US351688A US1797550A (en) | 1929-04-01 | 1929-04-01 | Core catcher |
Publications (1)
Publication Number | Publication Date |
---|---|
US1797550A true US1797550A (en) | 1931-03-24 |
Family
ID=23381934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US351688A Expired - Lifetime US1797550A (en) | 1929-04-01 | 1929-04-01 | Core catcher |
Country Status (1)
Country | Link |
---|---|
US (1) | US1797550A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3952817A (en) * | 1974-03-08 | 1976-04-27 | Longyear Company | Basket type core retainer |
US20100133014A1 (en) * | 2007-10-31 | 2010-06-03 | Korea Institute Of Geoscience And Mineral Resource (Kigam) | Core Catcher and Corer Having It |
-
1929
- 1929-04-01 US US351688A patent/US1797550A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3952817A (en) * | 1974-03-08 | 1976-04-27 | Longyear Company | Basket type core retainer |
US20100133014A1 (en) * | 2007-10-31 | 2010-06-03 | Korea Institute Of Geoscience And Mineral Resource (Kigam) | Core Catcher and Corer Having It |
US8109347B2 (en) * | 2007-10-31 | 2012-02-07 | Korea Institute Of Geoscience And Mineral Resources (Kigam) | Core catcher and corer having it |
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