GB1348670A - Earth boring bit for enlarging a pilot into a hole of larger diameter - Google Patents
Earth boring bit for enlarging a pilot into a hole of larger diameterInfo
- Publication number
- GB1348670A GB1348670A GB2254871A GB2254871A GB1348670A GB 1348670 A GB1348670 A GB 1348670A GB 2254871 A GB2254871 A GB 2254871A GB 2254871 A GB2254871 A GB 2254871A GB 1348670 A GB1348670 A GB 1348670A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- bit
- enlarging
- cutters
- rotation
- 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
- 230000001154 acute effect Effects 0.000 abstract 2
- 238000005553 drilling Methods 0.000 abstract 1
- 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
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/28—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
-
- 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
- E21B10/08—Roller bits
- E21B10/10—Roller bits with roller axle supported at both ends
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
1348670 Boring earth and rock DRESSER INDUSTRIES INC 19 April 1971 [9 March 1970] 22548/71 Heading E1F A bit has the cutting surface and preferably the axis of rotation also of at least one roller cutter 26 arranged at an acute angle, and the cutting surface and preferably the axis of rotation also of at least one further roller cutter 29 at an obtuse angle, to a central shaft 28. The angle # which the axis of rotation of the cutter 26 makes with the shaft is greater than 45 and may be 57. The cutters are equal in size and arranged in axially spaced groups (drilling stages) about the shaft 28, of which two only are shown in Fig. 3. In the first group, a pair of cutters 26, 27 are inclined at the acute angle so as to cut away the formtaion close to the shaft, and the rollers 29 and 30 slant away from the shaft at an obtuse angle. The cutters 33 and 34 second group, of which only two are shown slant away from the shaft at an obtuse angle. The bit is adapted for enlarging a previously bored pilot hole through which the shaft 28 is drawn while rotating the bit.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1766370A | 1970-03-09 | 1970-03-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1348670A true GB1348670A (en) | 1974-03-20 |
Family
ID=21783864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2254871A Expired GB1348670A (en) | 1970-03-09 | 1971-04-19 | Earth boring bit for enlarging a pilot into a hole of larger diameter |
Country Status (7)
Country | Link |
---|---|
US (1) | US3633691A (en) |
JP (1) | JPS526921B1 (en) |
CA (1) | CA931137A (en) |
DE (1) | DE2112420B2 (en) |
FR (1) | FR2081802B1 (en) |
GB (1) | GB1348670A (en) |
ZA (1) | ZA71818B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2264132A (en) * | 1992-02-17 | 1993-08-18 | Kverneland Klepp As | A hole opener device for the top hole section of oil/gas wells |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3750767A (en) * | 1971-05-24 | 1973-08-07 | Hughes Tool Co | Rolling cutter mounting in big hole reaming bit |
ZA714204B (en) * | 1971-06-28 | 1972-03-29 | Mcdonnell P Ltd | Improvements in or relating to rotary cutters |
JPS5527657U (en) * | 1978-08-11 | 1980-02-22 | ||
US4258805A (en) * | 1979-08-27 | 1981-03-31 | Dresser Industries, Inc. | Low cutter load raise head |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1322696A (en) * | 1918-10-29 | 1919-11-25 | Howard R Hughes | Rotary boring-drill. |
US1826059A (en) * | 1927-09-07 | 1931-10-06 | Dunn William Tracy | Drilling head |
US2064273A (en) * | 1935-04-22 | 1936-12-15 | Hughes Tool Co | Roller boring drill |
US2122808A (en) * | 1935-12-24 | 1938-07-05 | Globe Oil Tools Co | Rock bit |
US2208530A (en) * | 1938-02-03 | 1940-07-16 | Thompson Tool Company Inc | Rotary well drill |
US2703698A (en) * | 1951-09-17 | 1955-03-08 | William J B Westerman | Counterboring rotary drill |
US3285355A (en) * | 1964-02-17 | 1966-11-15 | Smith Ind International Inc | Large diameter well-drilling bit |
US3437380A (en) * | 1967-11-06 | 1969-04-08 | Alkirk Inc | Steering method and apparatus |
-
1970
- 1970-03-09 US US17663A patent/US3633691A/en not_active Expired - Lifetime
-
1971
- 1971-02-04 CA CA104475A patent/CA931137A/en not_active Expired
- 1971-02-09 ZA ZA710818A patent/ZA71818B/en unknown
- 1971-03-09 FR FR7108087A patent/FR2081802B1/fr not_active Expired
- 1971-03-09 DE DE2112420A patent/DE2112420B2/en not_active Ceased
- 1971-03-09 JP JP46012746A patent/JPS526921B1/ja active Pending
- 1971-04-19 GB GB2254871A patent/GB1348670A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2264132A (en) * | 1992-02-17 | 1993-08-18 | Kverneland Klepp As | A hole opener device for the top hole section of oil/gas wells |
US5337843A (en) * | 1992-02-17 | 1994-08-16 | Kverneland Klepp As | Hole opener for the top hole section of oil/gas wells |
AU657836B2 (en) * | 1992-02-17 | 1995-03-23 | Weatherford/Lamb Inc. | Hole opener for the top hole section of oil/gas wells |
GB2264132B (en) * | 1992-02-17 | 1995-10-11 | Kverneland Klepp As | A hole opener device for the top hole section of oil/gas wells |
Also Published As
Publication number | Publication date |
---|---|
ZA71818B (en) | 1971-10-27 |
FR2081802A1 (en) | 1971-12-10 |
US3633691A (en) | 1972-01-11 |
JPS526921B1 (en) | 1977-02-25 |
CA931137A (en) | 1973-07-31 |
DE2112420A1 (en) | 1971-09-30 |
FR2081802B1 (en) | 1975-02-21 |
DE2112420B2 (en) | 1978-11-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |