GB2389611A - Device of a derrick - Google Patents

Device of a derrick

Info

Publication number
GB2389611A
GB2389611A GB0319024A GB0319024A GB2389611A GB 2389611 A GB2389611 A GB 2389611A GB 0319024 A GB0319024 A GB 0319024A GB 0319024 A GB0319024 A GB 0319024A GB 2389611 A GB2389611 A GB 2389611A
Authority
GB
United Kingdom
Prior art keywords
lifting
piston rod
cylinder part
lowering
string
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.)
Granted
Application number
GB0319024A
Other versions
GB0319024D0 (en
GB2389611B (en
Inventor
Gunnar Kristiansen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority claimed from PCT/NO2001/000058 external-priority patent/WO2002072996A1/en
Publication of GB0319024D0 publication Critical patent/GB0319024D0/en
Publication of GB2389611A publication Critical patent/GB2389611A/en
Application granted granted Critical
Publication of GB2389611B publication Critical patent/GB2389611B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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

Abstract

A device of a derrick is described comprising lifting- and lowering equipment (20) for movement of a drill tring/pipe string (17) in axial direction in a derrick and gripping- and holding equipment & <slips / 16, 18), which are arranged at the upper and lower end of the lifting- and lowering equipment (20), to individually and in turn, grip and release, respectively, the string (17) in connection with lifting and lowering of same. The device is characterised in that the lifting- and lowering equipment is comprised of a single pressure-medium cylinder (20) with hollow (pipe-formed) piston rod (23), that the string (17) is arranged to run through the piston rod (23) and associated cylinder part (21) in an unhindered way and that the pressure-medium chamber (25) of the cylinder part (21, which is arranged to take up the associated piston (28) of the cylinder (20) and associated hollow piston rod (23), is limited in the cylinder part (21) between an outer wall (26) and an inner wall (27). The piston rod (23) is preferably rigidly rotating connected to the cylinder part (21).
GB0319024A 2001-02-16 2001-02-16 Device of a Derrick Expired - Fee Related GB2389611B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NO2001/000058 WO2002072996A1 (en) 1999-08-19 2001-02-16 Device of a derrick

Publications (3)

Publication Number Publication Date
GB0319024D0 GB0319024D0 (en) 2003-09-17
GB2389611A true GB2389611A (en) 2003-12-17
GB2389611B GB2389611B (en) 2005-04-13

Family

ID=28450168

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0319024A Expired - Fee Related GB2389611B (en) 2001-02-16 2001-02-16 Device of a Derrick

Country Status (1)

Country Link
GB (1) GB2389611B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357994A (en) * 1980-05-07 1982-11-09 Hall Ellis C Hydraulic well equipment hoist
GB2106955A (en) * 1981-07-20 1983-04-20 Varco Int Fluid actuated jack mechanism
NO301847B1 (en) * 1996-06-26 1997-12-15 Procon Drilling Services As Snubbinganordning
WO1999035367A1 (en) * 1997-12-22 1999-07-15 Dolphin As Arrangements in snubbing rigs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357994A (en) * 1980-05-07 1982-11-09 Hall Ellis C Hydraulic well equipment hoist
GB2106955A (en) * 1981-07-20 1983-04-20 Varco Int Fluid actuated jack mechanism
NO301847B1 (en) * 1996-06-26 1997-12-15 Procon Drilling Services As Snubbinganordning
WO1999035367A1 (en) * 1997-12-22 1999-07-15 Dolphin As Arrangements in snubbing rigs

Also Published As

Publication number Publication date
GB0319024D0 (en) 2003-09-17
GB2389611B (en) 2005-04-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20140216