GB1377485A - Equipment adapted to carry out operations in connection with wells or boreholes - Google Patents

Equipment adapted to carry out operations in connection with wells or boreholes

Info

Publication number
GB1377485A
GB1377485A GB5971970A GB5971970A GB1377485A GB 1377485 A GB1377485 A GB 1377485A GB 5971970 A GB5971970 A GB 5971970A GB 5971970 A GB5971970 A GB 5971970A GB 1377485 A GB1377485 A GB 1377485A
Authority
GB
United Kingdom
Prior art keywords
cable
constant
drum
tension
constant tension
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
Application number
GB5971970A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to GB5971970A priority Critical patent/GB1377485A/en
Priority to US00135667A priority patent/US3743249A/en
Publication of GB1377485A publication Critical patent/GB1377485A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • 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
    • E21B19/09—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 specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string

Abstract

1377485 Constant tension arrangements SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 14 Dec 1971 [16 Dec 1970] 59719/70 Heading B8B [Also in Division E1] An apparatus for maintaining a constant tension in a cable 15 carrying a travelling block 17 supporting a drill string 3 from a drilling rig, on a ship 1 comprises a drum 21 having a cable supporting surface of non-constant radius and to which one end of the cable 15 is secured, the drum 21 being coupled through a rack and pinion or chain and sprocket arrangement 23, 22 to the piston 25 of a ram 26 loaded with gas or liquid at a pre-set pressure. Increase in pressure in the ram 26 due to increasing tension in the cable 15 is compensated for by the cable winding from the drum 21 at increasing radii such that the load exerted on the cable 15 remains substantially constant. The drum of non-constant radius is formed either as a conical screw or a spiral depending on the amount of cable to be wound. The drill string 3 is raised and lowered by a winch 20 acting on the remote end of the cable 15, and the constant tension apparatus coming into use when the string 3 is secured at the sea bed well head by clamping rams 10 of a blow out preventor 8, and sea wave motion varies the tension in the cable 15. A similar constant tension apparatus is applied to a well equipment guide line 32 extending between the ship and sea bed. In the embodiment of Figs. 2 and 3 (not shown), the non-constant radiused sheave is rotatable with a coaxial circular sheave, from which a cable extends for connection a pair of piston-rods of parallel rams.
GB5971970A 1970-04-30 1970-12-16 Equipment adapted to carry out operations in connection with wells or boreholes Expired GB1377485A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB5971970A GB1377485A (en) 1970-12-16 1970-12-16 Equipment adapted to carry out operations in connection with wells or boreholes
US00135667A US3743249A (en) 1970-04-30 1971-04-20 Heave compensator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5971970A GB1377485A (en) 1970-12-16 1970-12-16 Equipment adapted to carry out operations in connection with wells or boreholes

Publications (1)

Publication Number Publication Date
GB1377485A true GB1377485A (en) 1974-12-18

Family

ID=10484294

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5971970A Expired GB1377485A (en) 1970-04-30 1970-12-16 Equipment adapted to carry out operations in connection with wells or boreholes

Country Status (1)

Country Link
GB (1) GB1377485A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179233A (en) * 1977-07-14 1979-12-18 National Advanced Drilling Machines, Inc. Vertical motion compensated crane apparatus
GB2224711A (en) * 1988-09-07 1990-05-16 Rexroth Mannesmann Gmbh Hoist device for a load hanging on hoist ropes, in particular a container-crane
NO20170408A1 (en) * 2014-08-21 2017-03-17 Mhwirth As Drilling tubular weight compensating system
CN110094230A (en) * 2018-01-30 2019-08-06 岭东核电有限公司 The adherent shuttle platform of tunnel and tunnel monitoring device
CN110920811A (en) * 2019-10-21 2020-03-27 上海衡拓实业发展有限公司 Electric drive steel wire rope anti-loosening device for offshore replenishment

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179233A (en) * 1977-07-14 1979-12-18 National Advanced Drilling Machines, Inc. Vertical motion compensated crane apparatus
GB2224711A (en) * 1988-09-07 1990-05-16 Rexroth Mannesmann Gmbh Hoist device for a load hanging on hoist ropes, in particular a container-crane
GB2224711B (en) * 1988-09-07 1992-10-14 Rexroth Mannesmann Gmbh "hoist devices"
NO20170408A1 (en) * 2014-08-21 2017-03-17 Mhwirth As Drilling tubular weight compensating system
NO342532B1 (en) * 2014-08-21 2018-06-11 Mhwirth As Drilling tubular weight compensating system and method
US10385633B2 (en) 2014-08-21 2019-08-20 Mhwirth As Drilling tubular weight compensating system
CN110094230A (en) * 2018-01-30 2019-08-06 岭东核电有限公司 The adherent shuttle platform of tunnel and tunnel monitoring device
CN110920811A (en) * 2019-10-21 2020-03-27 上海衡拓实业发展有限公司 Electric drive steel wire rope anti-loosening device for offshore replenishment
CN110920811B (en) * 2019-10-21 2021-09-10 上海衡拓实业发展有限公司 Electric drive steel wire rope anti-loosening device for offshore replenishment

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed