GB890086A - Telescopic derrick and locking means therefor - Google Patents
Telescopic derrick and locking means thereforInfo
- Publication number
- GB890086A GB890086A GB440760A GB440760A GB890086A GB 890086 A GB890086 A GB 890086A GB 440760 A GB440760 A GB 440760A GB 440760 A GB440760 A GB 440760A GB 890086 A GB890086 A GB 890086A
- Authority
- GB
- United Kingdom
- Prior art keywords
- derrick
- pawls
- raised
- abuts
- extended
- 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
- 238000013459 approach Methods 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/023—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting the mast being foldable or telescopically retractable
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
890,086. Erecting portable derrick masts. CABOT CORPORATION. Feb. 8, 1960, No. 4407/60. Class 78 (4). [Also in Group XXV] The telescopic sections 8, 10, Fig. 1, of a derrick are extended and retracted by an hydraulic ram 32, 36. Pawls 76, Figs. 3, 5, hold the upper section 10 in its raised position by riding over and engaging the upper surface of shoulders 94 as the derrick is extended. In the form illustrated the pawls are urged outwardly by springs 50. To disengage the pawls, the upper derrick section is raised until a lever 64, Fig. 3, abuts a stop 100 and rotates a shaft 60 and an arm 58, Fig. 6, anti-clockwise. Thus, levers 56 are moved inwards to compress springs 50 and withdraw pawls 76 through connetting-rods 72. Simultaneously a rod 66 moves to the right in Fig. 6 until a notch 68 engages a member 70 to latch the pawls in their retracted position. As the upper section of the derrick approaches its fully retracted position the bar 66 abuts and is raised by a stop 104, Fig. 1, thus releasing pawls 76 which move out in readiness for the next extending movement of the derrick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB440760A GB890086A (en) | 1960-02-08 | 1960-02-08 | Telescopic derrick and locking means therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB440760A GB890086A (en) | 1960-02-08 | 1960-02-08 | Telescopic derrick and locking means therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB890086A true GB890086A (en) | 1962-02-28 |
Family
ID=9776622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB440760A Expired GB890086A (en) | 1960-02-08 | 1960-02-08 | Telescopic derrick and locking means therefor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB890086A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3412380C1 (en) * | 1984-04-03 | 1985-04-25 | Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter | Telescopic mast with a finger platform |
| CN113719241A (en) * | 2021-09-03 | 2021-11-30 | 中石化四机石油机械有限公司 | Derrick structure of ocean workover rig and installation method thereof |
-
1960
- 1960-02-08 GB GB440760A patent/GB890086A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3412380C1 (en) * | 1984-04-03 | 1985-04-25 | Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter | Telescopic mast with a finger platform |
| CN113719241A (en) * | 2021-09-03 | 2021-11-30 | 中石化四机石油机械有限公司 | Derrick structure of ocean workover rig and installation method thereof |
| CN113719241B (en) * | 2021-09-03 | 2024-05-28 | 中石化四机石油机械有限公司 | Ocean workover rig derrick structure and installation method thereof |
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