BRPI0815538B1 - Connector assembly for use in a vessel. - Google Patents

Connector assembly for use in a vessel. Download PDF

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Publication number
BRPI0815538B1
BRPI0815538B1 BRPI0815538-0A BRPI0815538A BRPI0815538B1 BR PI0815538 B1 BRPI0815538 B1 BR PI0815538B1 BR PI0815538 A BRPI0815538 A BR PI0815538A BR PI0815538 B1 BRPI0815538 B1 BR PI0815538B1
Authority
BR
Brazil
Prior art keywords
connector
vessel
riser
connector assembly
attached
Prior art date
Application number
BRPI0815538-0A
Other languages
Portuguese (pt)
Inventor
Bro Sorenson Bjorn
Original Assignee
Grenland Group Technology 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
Priority to US93552807P priority Critical
Priority to US60/935528 priority
Priority to GB0716130A priority patent/GB0716130D0/en
Priority to GB0716130.0 priority
Application filed by Grenland Group Technology As filed Critical Grenland Group Technology As
Priority to PCT/GB2008/002764 priority patent/WO2009024760A2/en
Publication of BRPI0815538A2 publication Critical patent/BRPI0815538A2/en
Publication of BRPI0815538B1 publication Critical patent/BRPI0815538B1/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/24Guiding or centralising devices for drilling rods or pipes
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/002Handling 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
    • E21B19/004Handling 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
    • E21B19/006Handling 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

Description

(54) Title: CONNECTOR SET FOR USE ON A VESSEL.
(51) Int.CI .: E21B 19/24; E21B 19/00 (30) Unionist Priority: 08/17/2007 GB 0716130.0, 08/17/2007 US 60/935528 (73) Holder (s): GRENLAND GROUP TECHNOLOGY AS (72) Inventor (s): BJORN BRO SORENSON “CONNECTOR SET FOR USE ON A VESSEL”
This invention relates to a connector set for use on a vessel to eliminate relative vertical movement between the vessel and equipment affixed to an ascending tube affixed to an underwater well.
In oil and gas drilling operations where there are several techniques for inserting or removing production pipe or ducts or lines in or from wells. Well intervention techniques include the use of coiled tube, steel cables or a process where individual tube sections are threaded together to form a continuous tube in the well, also called a retainer. In an intervention with a spiral tube, a continuous tube initially wound on a reel is unrolled, ordered and pushed down the well. To do this, several items of equipment are located in the area above the well, all supported on a common frame. A typical configuration involves, from top to bottom, a goose neck to guide and order the spiral tube as it is fed from the reel, an injector head to push the production tube to or pull it out of the well , a packing box to form a seal around the production tube, and a set of explosion preventers. There may be additional components depending on the specifics of the operation performed. The explosion preventive set itself may consist of a number of components, such as tube drawers, a wedge drawer, a cutting drawer and a blind drawer.
Regarding the well intervention carried out by a floating vessel in an underwater well, it is necessary to prepare or assemble all the equipment on top of a riser, which is attached to the top of the well at the bottom of the sea. The ascending tube extends from the top of the well at the bottom of the sea, to the work deck of the vessel. The length of the riser depends on the depth of the sea and can be considerable, so to prevent it from collapsing, it is supported by a tensioning mechanism attached to the vessel. The tensioning mechanism compensates for the vessel's pitching movement, so that the riser is supported without flaming, and the top of the riser does not move vertically in relation to the seabed. However, well intervention equipment located on the vessel moves vertically due to pitching induced by waves and currents, and this can be a problem when it is desired to perform operation, testing and maintenance of the intervention equipment.
To deal with this problem, it was proposed in WO 03/067023 to provide a telescopic connection between the riser pipe and the well intervention equipment. One half of the telescope is attached to the top of the riser and the other half of the telescope is attached to the intervention equipment which can then move with the vessel's pitching motion, causing the telescope parts to slide with respect to each other . Therefore, well intervention equipment can be stationary in relation to the vessel's structure, making preparation, testing and maintenance of equipment a safer and easier operation than it would be if they were attached to the riser and mobile in relation to the vessel. . The system is then designed to eliminate relative vertical pitching movements between the equipment and the vessel.
The known system involves the provision of a low pressure seal during the elimination of pitching mode, and thus requires that the telescopic cylinders have a dynamic slip seal between them. The inventor has now recognized that in many well intervention situations there is in fact no need to provide a continuous sealed duct between the riser and the intervention equipment.
According to the invention, a connector assembly is provided for use on a vessel to eliminate relative vertical movement between the vessel and an upward tube attached to an underwater well, the connector assembly comprising a first connector part to be attached to the tube upward, a second connector part to be attached to the vessel, the second connector part being connectable to the first connector part without relative axial movement and disconnectable from the first connector part to allow relative axial movement between the first and second connector parts, and an alignment mechanism that, when the first and second connector parts are disconnected, keeps the connector parts in axial alignment and spaced in an unsealed manner by a gap whose size varies with relative axial movement of the first and second connector parts .
With this type of arrangement, during, for example, well intervention operations, the first and second parts can be disconnected to allow relative axial movement. The size of the unsealed gap between the connector parts varies with pitching motion, but as the connector parts are kept in axial alignment, if it is desirable to insert any equipment, such as tubular ducts, into the riser, then this still can be done even if there is a variable gap. In some situations, therefore, this will be a relatively inexpensive solution to the problem of relative movement of a vessel and an upward tube due to the vessel's pitching movement.
Preferably, the alignment mechanism comprises a first support extending laterally from the first connector part, a second support extending laterally from the second connector part, and a guiding device spaced laterally from the first and second connector parts and extending between the first and second supports to keep the first and second connector parts in axial alignment during relative axial movement thereof. The guiding device may comprise a guide member fixed to the first and second supports and movable with respect to the other supports. The guide member can be attached to the first support, but preferably it is attached to the second support.
A protective casing can be provided for the guiding device. The protective casing may take the form of a cylinder. The guide member of the guiding device can be slidably received in the cylinder.
In a preferred embodiment, a plurality of guiding devices are provided, each laterally spaced from the first and second connector parts. This can help to handle any lateral or torsional loading. Plurally guided devices such as these are advantageously spaced evenly around the central axis of the first and second connector parts. In a preferred embodiment, three guiding devices are provided. Thus, there may be a plurality of guiding devices disposed laterally out of the connector parts. In order to protect the impact guidance devices against other equipment, for example, in the vessel's central well area, a protective shield member may be disposed laterally out of the plurality of guidance devices. A shield member like this is preferably generally cylindrical.
The first support can be provided with a flange to connect it to the first connector, which can have a corresponding flange. The second support can be provided with a flange to connect to the second connector, which can have a corresponding flange.
The first and second connector parts may belong to a quick connector of a known type. These connectors involve a tubular portion coupling within another tubular portion and a locking mechanism and sealing system that is automatically engaged and energized as the two conjugated halves are joined by an axial force. The locking mechanism can be released and the seal de-energized by applying hydraulic pressure supplied by a hydraulic line, as long as there is no internal pressure or applied tensile force. When it is desired to separate the connector parts, the applied pressure and the two connector parts can be separated to distance axially.
Part of the connector assembly alignment mechanism will be fixed in relation to the riser and the other part will be fixed in relation to the vessel, the two parts being movable with respect to each other. The alignment mechanism can have at least one clamp for attaching to the riser. In order to provide a stable arrangement, a plurality (e.g., days) of vertically spaced clamps may be provided.
Where a protective housing is provided for a guiding device, and where one or more clamps are provided to secure the alignment mechanism to the riser, then the clamp or each of it may act as a support (s) for the protective housing.
A preferred embodiment of the invention can now be described by way of example and with reference to the accompanying drawings, in which:
Fig. 1 is a perspective view of a connector assembly according to the invention.
Fig. 2 is an enlargement of detail “II” in fig. 1.
Fig. 3 is an enlargement of detail “III” in fig. 1.
Fig. 4 is an enlargement of the detail “IV” in fig. 1.
The connector assembly consists of a first or lower connector part 4 and a second or upper connector part 3. The two connector parts are supported by an alignment mechanism 30 which is arranged to keep the connector parts in axial alignment while they move to and against each other. As will be described below, during this relative vertical movement of the lower and upper connector parts, the lower connector part 4 is in a stationary position in relation to a riser, while the upper connector part 3 is in a stationary position at relation to a vessel.
Referring to figures 1 and 3, a more upper section 20 of an intervention riser has a lower flange 21 attached to the lower section next to the intervention riser (not shown) with other sections being provided below to compensate for the distance below to the wellhead at the bottom of the sea. The bottom end of the complete riser assembly is then affixed to the top of the well. A flange 14 is provided at the upper end of the upper riser section 20 (see fig. 3).
The alignment mechanism 30 is attached to the upper riser section 20 by means of an upper clamp 16 and a lower clamp 17. Each clamp supports three vertically extending protective sheaths 15, arranged in equivalent circumferential spacings around the cross section. riser 20. At the end of the three cases, a protective cap 18 protects cases 15 (and an umbilical, if necessary) against contact with other equipment. The protective cap 18 is shown only partially in fig. 1.
The alignment mechanism 30 also has three vertical guide members 5, each slidingly received in a respective housing 15. On top of the guide members 5 an upper support is provided
2. The upper support - has an upper flange 1 to connect to the lower end of intervention equipment, such as a set of explosion prevention devices or the like, either directly or through an extension joint. Typically, intervention equipment is supported by a frame. Neither the intervention equipment nor the frame is shown in the drawings. The upper support 2 is provided with a lower flange 12 which is connected to an upper flange 10 of the upper connector part 3. When the upper and lower connector parts 3, 4 need to move in relation to each other, then the support upper 2 is fixed in relation to the vessel due to its connection to the intervention equipment by means of the upper flange 1.
A lower support 6 is formed with three vertical openings 23 through which the three guide members 5 extend in a relatively slidable manner. The lower support 6 has a lower flange 7 attached to the upper flange 14 of the riser section 20, and an upper flange 13 attached to a lower flange 11 of the lower connector part 4. In this way, the lower support 6 is fixed in relation to to the riser, while the upper support 2 is movable in relation to the lower support due to the guide members 4 sliding into the openings 23.
When operating in the well, the connector parts 3 and 4 (which in this mode is characterized by a quick connector) are fixed together and the complete riser including the connector is pressurized, hence the complete column moves vertically in relation to the vessel as it pants. In this situation, the two parts of the quick connector 3 and 4 are connected together, making a pressure tight connection. When there is no operation underway in the well, valves still below the riser and well are closed, and the pressure at the top of the riser column can be released and purged by an inert gas before being bled. Once bled, the quick-locking mechanism is operated remotely by means of hydraulics, and the quick-connector parts 3 and 4 can be separated by lifting the tension / suspension frame upwards using a attached winch or jack to the vessel structure.
When separated, the upper connector part 3 will still be laterally centered above the lower connector part 4, by means of the lower sliding support 6, attached to the lower part 4, sliding along the three vertical guide members 5 that are all fixed to the upper support 2, which is attached to the upper connector part 3. The upper and lower connector parts are separated by an axial gap in an unsealed manner. All three guides are protected by separate protective enclosures 15, attached to the upper intervention tube section by means of the upper guide clamp 16 and the lower guide clamp 17.
As the riser moves vertically 10 in relation to the vessel structure, the upper connector part 3 and the suspension / tensioning frame together with the intervention equipment, are no longer attached to, and do not move together with, the riser. They can now be parked in a fixed position without any relative movements in relation to the vessel's structure. This fixed parked position without any relative movements allows preparation and maintenance work to be carried out in a safe manner. This, in turn, will increase the operational window of the intervention vessel as the demands on wave conditions and calm winds are reduced. As the vessel pants, the size of the axial clearance between the upper and lower connector parts changes.

Claims (10)

1. Connector assembly for use on a vessel to eliminate relative vertical movement between the vessel and a riser attached to an underwater well, characterized by the fact that it comprises a first connector part to be attached to the riser, a second connector part a be attached to the vessel, the second connector part being connectable to the first connector part without relative axial movement and disconnectable from the first connector part to allow relative axial movement between the first and second connector parts, and an alignment mechanism which, when the first and second connector parts are disconnected, keeping the connector parts in axial alignment and spaced apart in an unsealed manner by a gap whose size varies with relative axial movement of the first and second connector parts.
Connector assembly according to claim 1, characterized in that the alignment mechanism comprises a first support extending laterally from the first connector part, a second support extending laterally from the second connector part, and a guiding device spaced from the first and second connector parts and extending between the first and second supports to keep the first and second connector parts in axial alignment during relative axial movement thereof.
Connector assembly according to claim 2, characterized in that the guide device comprises a guide member fixed to one of the first and second supports and movable in relation to the other of the supports.
Connector assembly according to claim 3, characterized by the fact that the guide member is attached to the second support.
Connector assembly according to claim 2, 3 or 4, characterized in that it comprises a protective housing for the guiding device.
Connector assembly according to any one of claims 2 to 5, characterized in that it comprises a plurality
5 of guiding devices each laterally spaced from the first and second connector parts.
Connector assembly according to claim 6, characterized in that it comprises a protective shield member disposed laterally out of the plurality of guiding devices.
10
Connector assembly according to any one of claims 2 to 7, characterized in that the first support is provided with a flange to connect to the first connector.
Connector assembly according to any one of claims 2 to 8, characterized in that the second support is
15 provided with a flange to connect to the second connector.
10. Connector assembly according to any one of the preceding claims, characterized in that the alignment mechanism has at least one clamp for attaching to the riser.
11. Connector assembly according to claim 10, characterized by the fact that the alignment mechanism has at least two clamps that are axially spaced to be attached to the riser in the respective vertical positions.
1/1
Ζ2 \
BRPI0815538-0A 2007-08-17 2008-08-15 Connector assembly for use in a vessel. BRPI0815538B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US93552807P true 2007-08-17 2007-08-17
US60/935528 2007-08-17
GB0716130A GB0716130D0 (en) 2007-08-17 2007-08-17 Connector assembly
GB0716130.0 2007-08-17
PCT/GB2008/002764 WO2009024760A2 (en) 2007-08-17 2008-08-15 Connector assembly for riser with heave compensation

Publications (2)

Publication Number Publication Date
BRPI0815538A2 BRPI0815538A2 (en) 2015-02-10
BRPI0815538B1 true BRPI0815538B1 (en) 2018-02-14

Family

ID=38566605

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0815538-0A BRPI0815538B1 (en) 2007-08-17 2008-08-15 Connector assembly for use in a vessel.

Country Status (5)

Country Link
EP (1) EP2176506B1 (en)
BR (1) BRPI0815538B1 (en)
DK (1) DK2176506T3 (en)
GB (2) GB0716130D0 (en)
WO (1) WO2009024760A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN2014DN03473A (en) 2011-10-04 2015-06-05 Bayer Ip Gmbh

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO20011042L (en) * 2001-02-28 2002-08-29 Fred Olsen Productions As Device by a floating production unit
NO315807B3 (en) 2002-02-08 2008-12-15 Blafro Tools As Procedure and device for working rudder coupling
NO317230B1 (en) * 2002-11-12 2004-09-20 Nat Oilwell Norway As Two-part telescopic tensioner for riser at a floating installation for oil and gas production
US7219739B2 (en) * 2005-03-07 2007-05-22 Halliburton Energy Services, Inc. Heave compensation system for hydraulic workover
US20070084606A1 (en) 2005-10-13 2007-04-19 Hydraulic Well Control, Llc Rig assist compensation system

Also Published As

Publication number Publication date
WO2009024760A3 (en) 2009-05-22
EP2176506B1 (en) 2018-12-26
BRPI0815538A2 (en) 2015-02-10
EP2176506A2 (en) 2010-04-21
DK2176506T3 (en) 2019-04-01
WO2009024760A2 (en) 2009-02-26
GB0814975D0 (en) 2008-09-24
GB0716130D0 (en) 2007-09-26
GB2451958A (en) 2009-02-18
GB2451958B (en) 2012-07-11

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B16A Patent or certificate of addition of invention granted