US1715174A - Por stoberg - Google Patents
Por stoberg Download PDFInfo
- Publication number
- US1715174A US1715174A US1715174DA US1715174A US 1715174 A US1715174 A US 1715174A US 1715174D A US1715174D A US 1715174DA US 1715174 A US1715174 A US 1715174A
- Authority
- US
- United States
- Prior art keywords
- stoberg
- por
- por stoberg
- 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
Images
Classifications
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- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1715174A true US1715174A (en) | 1929-05-28 |
Family
ID=3418073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US1715174D Expired - Lifetime US1715174A (en) | Por stoberg |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1715174A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2451671A (en) * | 1943-08-17 | 1948-10-19 | Le Roi Company | Throttle valve for stopers |
| US4407396A (en) * | 1978-01-25 | 1983-10-04 | Sirven Jacques M M | Hydraulic shock absorber having piston-mounted valve biased by gaseous pressure |
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0
- US US1715174D patent/US1715174A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2451671A (en) * | 1943-08-17 | 1948-10-19 | Le Roi Company | Throttle valve for stopers |
| US4407396A (en) * | 1978-01-25 | 1983-10-04 | Sirven Jacques M M | Hydraulic shock absorber having piston-mounted valve biased by gaseous pressure |