NO345357B1 - A heave compensating system for a floating drilling vessel - Google Patents

A heave compensating system for a floating drilling vessel Download PDF

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Publication number
NO345357B1
NO345357B1 NO20190492A NO20190492A NO345357B1 NO 345357 B1 NO345357 B1 NO 345357B1 NO 20190492 A NO20190492 A NO 20190492A NO 20190492 A NO20190492 A NO 20190492A NO 345357 B1 NO345357 B1 NO 345357B1
Authority
NO
Norway
Prior art keywords
heave
inner barrel
top drive
drilling vessel
slips
Prior art date
Application number
NO20190492A
Other languages
Norwegian (no)
Other versions
NO20190492A1 (en
Inventor
Rune Stanghelle
Håkon Klepsvik
Thomas Borsholm
Per Lund
Original Assignee
Odfjell Drilling As
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 Odfjell Drilling As filed Critical Odfjell Drilling As
Priority to NO20190492A priority Critical patent/NO345357B1/en
Priority to PCT/EP2020/060063 priority patent/WO2020208092A1/en
Priority to GB2114536.2A priority patent/GB2596492B/en
Priority to CA3136399A priority patent/CA3136399A1/en
Publication of NO20190492A1 publication Critical patent/NO20190492A1/en
Publication of NO345357B1 publication Critical patent/NO345357B1/en
Priority to ZA2021/08011A priority patent/ZA202108011B/en

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
    • E21B19/002—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling
    • E21B19/004—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform
    • E21B19/006—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables specially adapted for underwater drilling supporting a riser from a drilling or production platform including heave compensators
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/01—Risers
    • 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
    • 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
    • E21B19/10—Slips; Spiders ; Catching devices

Description

The invention is related to a heave compensating system for a floating drilling vessel.
Heave movement is a limiting factor for drilling operations from semisubmersible rigs in harsh environment.
Conventional solutions for heave compensation only applies when the bit is on bottom.
Active heave compensated solutions work directly on the drawwork and can also compensate while tripping and with the string free hanging.
Document US 4545347 B1 discloses an apparatus and method for use in drilling a well from a floating vessel by means of a riser, which connects the vessels drilling equipment to a wellhead assembly adjacent the ocean floor. The riser is capable of being disconnected from the wellhead assembly, and having its upper elements locked to the vessel. This allows the riser to be suspended from the floating vessel or permits maintenance of the normal riser motion-compensating and tensioning equipment. Riser locking apparatus is employed which comprises selectively positionable moveable locking beams adapted to be remotely actuated to lock the upper elements of the riser to the vessel, thereby preventing lateral or vertical movement of the riser relative to the vessel after the lower end thereof has been disconnected from the wellhead assembly.
Document US 2009/0000788 A1 discloses a heave compensation system that facilitates the transfer of pipe between a floating platform and a snubbing jack. The heave compensation system includes a first end connected to the floating platform and a second end in connection with a traveling slip assembly of the snubbing jack, the heave compensation system is operable between a disengaged position and an engaged position. When the heave compensation system is in the disengaged position the traveling slip assembly moves separate and independent from the movement of the floating platform, and when the heave compensation system is in the engaged position the traveling slip assembly is locked in a constant position relative to the floating platform.
Document WO 2016/062812 A1 discloses an offshore drilling system comprising a drilling tower, a tubular string hoisting device with a crown block and a travelling block suspended from said crown block in a multiple fall arrangement, a heave compensation system adapted to provide heave compensation of the travelling block. The heave compensation system comprises a hydraulic sheave compensator. The system further comprises a mobile working deck which is movable with respect to the drilling tower within a motion range including a heave compensation motion range. The heave compensation system is further adapted to provide heave compensation of the mobile working deck by a hydraulic deck compensator, which is hydraulically connected via a hydraulic conduit to the hydraulic sheave compensator, such that in operation the deck compensator moves synchronously with the sheave compensator of the heave compensation system.
None of the existing solutions can compensate whilst the slips is set.
Challenges with the conventional solution relate to:
– Swab and surge pressures in the wellbore during drilling and casing connections (in slips).
– Operational limitations for drilling and well equipment used downhole
A solution that allows compensation of the slips will significantly reduce the operational limitations related to weather in harsh conditions.
A solution for slips compensation that can be combined with Managed Pressure Drilling (MPD) can be even more valuable.
The invention is related to a heave compensating system for a floating drilling vessel. The system comprising:
- a rig floor of the floating drilling vessel,
- a tubular extending through an opening of the rig floor,
- a slips for holding a part of the tubular,
- a top drive,
- an outer barrel structure connected to a wellhead, and
an inner barrel structure telescopically arranged inside the outer barrel and connectable to the slips. The heave compensating system further comprises:
- an outer barrel heave compensating system arranged between the outer barrel and the floating drilling vessel,
- a top drive heave compensating system arranged between the top drive and the floating drilling vessel, and
- an inner barrel heave compensator system arranged between the rig floor and the inner barrel for heave compensation of the slips.
The term tubulars is a generic term pertaining to any type of oilfield pipe, such as drill pipe, drill collars, pup joints, casing, liner and production tubing.
A top drive is a mechanical device on a drilling rig that provides clockwise torque to the drill string to drill a borehole. It is located at the swivel's place below the traveling block and moves vertically up and down the derrick. The top drive allows the drilling rig to drill the longer section of a stand of drill pipe in one operation.
A draw-works is the primary hoisting machinery component of a rotary drilling rig. Its main function is to provide a means of raising and lowering the traveling block. The wire-rope drill line winds on the draw works drum and over the crown block to the traveling block, allowing the drill string to be moved up and down as the drum turns.
The top drive heave compensating system may comprise a draw work.
The draw work may comprise an active heave compensation system (AHC).
The outer barrels structure may be connected to the wellhead via a drilling riser and a blowout preventer.
A new Active Heave Compensation (AHC) system may be added and attached to the telescopic barrel structure.
The heave compensating system, in operation, (i.e. connection mode, trip and drill a stand mode, pipe handling mode), at least one of the draw work compensating system and/or the inner barrel compensating system may be active or inactive.
In a “connection” mode. The inner barrels structure may be fixed in the outer barrel and in relation to the wellhead, wherein at least a section of the inner barrel structure is moveable through the opening of the rig floor. The inner barrel heave compensator system may be electronically synchronized with the top drive heave compensator system so that both top drive and slips are fully synchronized and compensated for the floating drilling vessel. This will allow connection or disconnection of new sections of drill pipe to the handing drill pipe string without swabbing and surging the well.
In a “trip and drill a stand” mode. The draw work may be compensated so that sections of the drill pipe is always relative to earth/well. The inner barrel structure may be locked to the rig floor and the inner barrel slides on the outer barrel. The inner barrel heave compensator system may be switched off or run in passive mode. The inner barrel structure may also be run compensated while in “trip and drill a stand” mode.
In a “pipehandling” mode. The draw work may not be compensated so that sections of the drill pipe can be moved between the pipe handler and the top drive. The inner barrel structure may be compensated to stay relative to the wellhead and the inner barrels structure is fixed to the outer barrel structure.
The system of the present invention may require a new torque wrench for make/break and a new stabbing guide installed on top of the compensated slips/ inner barrels structure, as well as relocation of diverter, and lines for mud return, riser fill and trip tank fill.
The diverter may be mounted below the slip joint / outer barrier.
The mud return, riser fill and trip tank fill may be relocated and mounted below the flex joint of the inner barrels structure.
The heave compensation system of the present invention may be combined with Managed Pressure Drilling (MPD).
The MPD is an adaptive drilling process used to more precisely control the annular pressure profile throughout the wellbore. The objectives of MPD are to ascertain the downhole pressure environment limits and to manage the annular hydraulic pressure profile accordingly.
A rotating control device may be arranged to create a pressure-tight barrier against drilling hazards. By creating a leak-free seal between the annulus and the drill pipe, the seal allows the operator to safely divert fluid returns during drilling and stripping operations.
The rotating control device may be mounted on the inner barrel structure adjacent to the rig floor, or the rotating control device may be mounted on the outer barrel structure below the slip joint.
The advantages of using compensated connection are:
-Reduce swab and surge while in slips – increased operability in harsh environment. -Maintaining efficiency when operating without compensated slips/rig floor.
-Can drill without a pup joint or raised backup tong (like on a fixed platform) -simplifies drilling connection.
-Saves time in testing and rigging of the flow diverter.
-Can be combined with back pressure MPD (managed pressure drilling with pressurized riser).
Figs. 1 A-B Shows a conventional system and the heave compensating system according to the present invention.
Figs. 2 A-C. Shows the “trip and drill stand” mode of the present invention.
Figs. 3 A-C Shows the “connection” mode according to the present invention.
Figs. 4 A-C Shows the “pipehandling” mode according to the present invention.
Figs. 5 A-B Shows the system description with compensated slips and rotating control device for backpressure.
Fig. 1A shows a conventional floating drilling vessel.
Fig. 1 B shows a heave compensating system for a floating drilling vessel according to the present invention. The system comprising a rig floor 14 of the floating drilling vessel, a tubular 17 extending through an opening of the rig floor 14, a slips 16 for holding a part of the tubular 17, a top drive 19, an outer barrel structure 7 connected to a wellhead 5, an inner barrel structure 8 telescopically arranged inside the outer barrel 7 and connectable to the slips 16.
The heave compensator system further comprises an outer barrel heave compensating system arranged between the outer barrel 7 and the floating drilling vessel, a top drive heave compensating system 18 arranged between the top drive 19 and the floating drilling vessel, and an inner barrel heave compensator system (25) arranged between the rig floor 14 and the inner barrel 8 for heave compensation of the slips 16.
The outer barrels structure 7 may be connected to the wellhead 5 via a drilling riser 2 and a blowout preventer (BOP) 6.
A torque wrench 22 for make/break of tubulars are placed on top of the inner barrel structure 8.
The riser flow diverter 13 may be relocated and mounted below the slip joint / outer barrel 8 and diverted flow like shallow gas may be routed out underneath the rig. The mud return-, riser fill- and trip tank fill lines 27 may be relocated to the inner barrel tension ring 26 in order to free up space for the inner barrel extension 23 under the rig floor 14 and rotary table.
Figures 2 A-C shows the floating drilling vessel in a “connection” mode. Fig. 2A in neutral heave, fig. 2B in upper position and fig. 2C in lower position. The inner barrels structure 8 may be fixed in the outer barrel structure 7, and in relation to the wellhead 5, wherein at least a section of the inner barrel structure 8 is moveable through the opening of the rig floor 14. The inner barrel heave compensator system 25 may be electronically synchronized with the top drive heave compensator system 18 so that both top drive 19 and slips 16 are fully synchronized and compensated for the floating drilling vessel. This will allow connection or disconnection of new sections of drill pipe to the handing drill pipe string without swabbing and surging the well 3.
Figures 3 A-C shows the floating drilling vessel in a “trip and drill a stand” mode. Fig. 3A in neutral heave, fig. 3B in upper position and fig. 3C in lower position. The draw work 18 may be compensated so that sections of the drill pipe is always relative to earth/well 3. The inner barrel structure 8 may be locked to the rig floor 14 and the inner barrel 8 slides on the outer barrel 7. The inner barrel heave compensator system 25 may be switched off or run in passive mode. The inner barrel structure 8 may also be run compensated while in “trip and drill a stand” mode.
Figures 4 A-C shows the floating drilling vessel in a “pipe handling” mode. Fig. 4A in neutral heave, fig. 4B in upper position and fig. 4C in lower position. The draw work 18 may not be compensated so that sections of the drill pipe can be moved between the pipe handler and the top drive 19. The inner barrel structure 8 may be compensated to stay relative to the wellhead 5 and the inner barrels structure 8 is fixed to the outer barrel structure 7.
The heave compensation system of the present invention may be combined with Managed Pressure Drilling (MPD). Figure 5 A-B shows a system description with heave compensating slips and rotating control device for back pressure MPD. The MPD is an adaptive drilling process used to more precisely control the annular pressure profile throughout the wellbore. The objectives of MPD are to ascertain the downhole pressure environment limits and to manage the annular hydraulic pressure profile accordingly. A rotating control device may be arranged to create a pressuretight barrier against drilling hazards. By creating a leak-free seal between the annulus and the drill pipe, the seal allows the operator to safely divert fluid returns during drilling and stripping operations.
The rotating control device may be mounted on the inner barrel structure 8 adjacent to the rig floor 14, or the rotating control device may be mounted on the outer barrel structure 7 below the slip joint.

Claims (6)

1. A heave compensating system for a floating drilling vessel, the system comprising:
- a rig floor (14) of the floating drilling vessel,
- a tubular (17) extending through an opening of the rig floor (14),
- a slips (16) for holding a part of the tubular (17),
- a top drive (19),
- an outer barrel structure (7) connected to a wellhead (5),
- an inner barrel structure (8) telescopically arranged inside the outer barrel (7) and connectable to the slips (16),
characterized in that the heave compensator system further comprises:
- an outer barrel heave compensating system arranged between the outer barrel (7) and the floating drilling vessel,
- a top drive heave compensating system (18) arranged between the top drive (19) and the floating drilling vessel, and
an inner barrel heave compensator system (25) arranged between the rig floor (14) and the inner barrel (8) for heave compensation of the slips (16).
2. The heave compensator system according to claim 1,
wherein the inner barrels structure (8) is fixed in the outer barrel structure (7) and in relation to the wellhead (5), wherein at least a section of the inner barrel structure (8) is moveable through the opening of the rig floor (14).
3. The heave compensator system according to claim 1 or 2, wherein the top drive heave compensating system (18) and/or the inner barrel heave compensator system (25) are Active Heave Compensating (AHC) systems.
4. The heave compensator system according to claim 3,
wherein the inner barrel heave compensator system (25) is electronically synchronized with the top drive heave compensator system (18) so that both top drive (19) and slips (16) are fully synchronized and compensated for the floating drilling vessel.
5. The heave compensator system according to claim 3 or 4,
wherein the top drive heave compensating system (18) is operated so that it can be disconnected.
6. The heave compensator system according to claim 3 or 4,
wherein the inner barrel structure (8) is locked to the rig floor (14) and that the inner barrel structure (8) slides in the outer barrel structure (7), wherein the inner barrel heave compensator system (25) can be switched off or run in passive mode.
NO20190492A 2019-04-10 2019-04-10 A heave compensating system for a floating drilling vessel NO345357B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NO20190492A NO345357B1 (en) 2019-04-10 2019-04-10 A heave compensating system for a floating drilling vessel
PCT/EP2020/060063 WO2020208092A1 (en) 2019-04-10 2020-04-08 A heave compensating system for a floating drilling vessel
GB2114536.2A GB2596492B (en) 2019-04-10 2020-04-08 A heave compensating system for a floating drilling vessel
CA3136399A CA3136399A1 (en) 2019-04-10 2020-04-08 A heave compensating system for a floating drilling vessel
ZA2021/08011A ZA202108011B (en) 2019-04-10 2021-10-19 A heave compensating system for a floating drilling vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO20190492A NO345357B1 (en) 2019-04-10 2019-04-10 A heave compensating system for a floating drilling vessel

Publications (2)

Publication Number Publication Date
NO20190492A1 NO20190492A1 (en) 2020-10-12
NO345357B1 true NO345357B1 (en) 2020-12-21

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NO20190492A NO345357B1 (en) 2019-04-10 2019-04-10 A heave compensating system for a floating drilling vessel

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CA (1) CA3136399A1 (en)
GB (1) GB2596492B (en)
NO (1) NO345357B1 (en)
WO (1) WO2020208092A1 (en)
ZA (1) ZA202108011B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113550703B (en) * 2021-09-07 2023-03-24 兰州兰石石油装备工程股份有限公司 Continuous rotating multifunctional iron roughneck
CN115324514B (en) * 2022-09-13 2024-04-16 大庆井升伟业油田技术服务有限公司 Multistage torque-increasing well repairing device for shallow sleeve leakage treatment

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4545437A (en) * 1984-04-09 1985-10-08 Shell Offshore Inc. Drilling riser locking apparatus and method
US4616708A (en) * 1985-01-25 1986-10-14 Shell Oil Company Riser tensioning system
US4617998A (en) * 1985-04-08 1986-10-21 Shell Oil Company Drilling riser braking apparatus and method
US20080271896A1 (en) * 2004-05-21 2008-11-06 Fmc Kongsberg Subsea As Device in Connection with Heave Compensation
US20090000788A1 (en) * 2004-07-01 2009-01-01 Bernt Olsen Heave Compensated Snubbing System and Method
WO2016062812A1 (en) * 2014-10-24 2016-04-28 Itrec B.V. Offshore drilling system, vessel and method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1103459A1 (en) * 1999-11-24 2001-05-30 Mercur Slimhole Drilling and Intervention AS Arrangement for heave and tidal movement compensation
US6343893B1 (en) * 1999-11-29 2002-02-05 Mercur Slimhole Drilling And Intervention As Arrangement for controlling floating drilling and intervention vessels

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4545437A (en) * 1984-04-09 1985-10-08 Shell Offshore Inc. Drilling riser locking apparatus and method
US4616708A (en) * 1985-01-25 1986-10-14 Shell Oil Company Riser tensioning system
US4617998A (en) * 1985-04-08 1986-10-21 Shell Oil Company Drilling riser braking apparatus and method
US20080271896A1 (en) * 2004-05-21 2008-11-06 Fmc Kongsberg Subsea As Device in Connection with Heave Compensation
US20090000788A1 (en) * 2004-07-01 2009-01-01 Bernt Olsen Heave Compensated Snubbing System and Method
WO2016062812A1 (en) * 2014-10-24 2016-04-28 Itrec B.V. Offshore drilling system, vessel and method

Also Published As

Publication number Publication date
GB202114536D0 (en) 2021-11-24
WO2020208092A1 (en) 2020-10-15
CA3136399A1 (en) 2020-10-15
GB2596492A (en) 2021-12-29
GB2596492B (en) 2022-09-07
NO20190492A1 (en) 2020-10-12
ZA202108011B (en) 2023-11-29

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