US20180119853A1 - Connection methods and systems - Google Patents
Connection methods and systems Download PDFInfo
- Publication number
- US20180119853A1 US20180119853A1 US15/805,061 US201715805061A US2018119853A1 US 20180119853 A1 US20180119853 A1 US 20180119853A1 US 201715805061 A US201715805061 A US 201715805061A US 2018119853 A1 US2018119853 A1 US 2018119853A1
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- US
- United States
- Prior art keywords
- collar
- fastener
- tubular component
- circumferential end
- load ring
- 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.)
- Abandoned
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- 230000013011 mating Effects 0.000 claims description 7
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- 229910052500 inorganic mineral Inorganic materials 0.000 claims 1
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- 238000009434 installation Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 13
- 239000012530 fluid Substances 0.000 description 12
- 238000010168 coupling process Methods 0.000 description 11
- 230000008878 coupling Effects 0.000 description 10
- 238000005859 coupling reaction Methods 0.000 description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 239000003345 natural gas Substances 0.000 description 5
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- 238000013461 design Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
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- 230000003203 everyday effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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- 238000005304 joining Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0206—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member the collar not being integral with the pipe
-
- 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
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
-
- 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
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
- E21B33/038—Connectors used on well heads, e.g. for connecting blow-out preventer and riser
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/01—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
- E21B43/013—Connecting a production flow line to an underwater well head
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
- F16L37/138—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members using an axially movable sleeve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49947—Assembling or joining by applying separate fastener
Definitions
- the present invention relates generally to connection systems for various components, such as fluid conduits. More particularly, the present invention relates to various novel connectors for coupling a pair of components together in an end-to-end relationship.
- oil and natural gas have a profound effect on modern economies and societies. Indeed, devices and systems that depend on oil and natural gas are ubiquitous. For instance, oil and natural gas are used for fuel in a wide variety of vehicles, such as cars, airplanes, boats, and the like. Further, oil and natural gas are frequently used to heat homes during winter, to generate electricity, and to manufacture an astonishing array of everyday products.
- drilling and production systems are often employed to access and extract the resource.
- These systems may be located onshore or offshore depending on the location of a desired resource.
- wellhead assemblies may include a wide variety of components and/or conduits, such as various casings, valves, and the like, that control drilling and/or extraction operations.
- various production and transport systems may also employ pipes or other fluid conduits, in addition to the components noted above.
- fluid conduits or other components of a production or transport system are typically coupled to one another to enable oil, gas, or the like to be extracted from the ground and routed to a desired location.
- Such fluid conduits or “tubular members”) are often coupled together in end-to-end relationships via various connectors that facilitate flow of oil, gas, or the like between the conduits.
- these connectors may be subjected to large axial loads, such as gravity (particularly in the case of suspended conduits) or internal pressures within the conduits.
- the space available for connecting conduit members may be limited in some applications. Consequently, there is a need for durable connectors that, among other things, have low profiles, provide sealed connections between two components (e.g., fluid conduits), and can withstand the axial loads expected within a given system.
- Embodiments of the present invention generally relate to novel connectors for joining two components, such as tubular members or conduits.
- the exemplary connector includes a collar configured to receive each of the two components in an end-to-end arrangement.
- the collar is configured to be threaded onto a first of the two components and to be coupled to the second of the two components via a load ring disposed between the collar and the second component.
- a locking key or cotter may be installed to facilitate positive engagement of the load ring with the collar.
- load rings may be provided in grooves of both of the two components to facilitate locking of the components to one another.
- one or more anti-rotation rods may be installed, either permanently or temporarily, in either or both of the grooves to prevent rotation of the load rings during engagement by a collar.
- the load rings may comprise C-rings, segmented rings, other split rings, or the like. Additionally, in various embodiments, rotation of the collar effects axial movement of one or both of the load rings to secure the two components to one another.
- FIG. 1 is a front elevational view of a system including two connection members coupled to one another via a collar in accordance with one embodiment of the present invention
- FIG. 2 is an exploded cross-sectional view of the system of FIG. 1 , illustrating various features of the exemplary system, including a load ring disposed in a groove of one of the connection members, in accordance with one embodiment of the present invention
- FIG. 3 is a perspective view of an exemplary load ring in accordance with one embodiment of the present invention.
- FIG. 4 illustrates an exemplary toothed surface of the load ring of FIG. 3 that may be provided in accordance with certain embodiments of the present invention
- FIG. 5 illustrates a different exemplary toothed surface of the load ring of FIG. 3 in accordance with certain embodiments of the present invention
- FIG. 6 is a cross-sectional view of the system of FIG. 2 , illustrating the stabbing of one connection member to the other connection member and the movement of the load ring into an additional groove in accordance with one embodiment of the present invention
- FIG. 7 is a cross-sectional view of the system of FIG. 6 , illustrating the installation of a key through a window of the collar and within the additional groove in accordance with one embodiment of the present invention
- FIG. 8 is a partial detail view generally taken along line 8 - 8 of FIG. 7 , illustrating the key secured to the connection member with a pair of set screws and portions of the load ring accessible through the window of the collar in accordance with one embodiment of the present invention
- FIG. 9 is a cross-sectional view of the system of FIG. 7 , illustrating the rotation of the collar to draw the load ring away from the installed key and into the upper groove of the connection member in accordance with one embodiment of the present invention
- FIG. 10 is a partial detail view generally taken along line 10 - 10 of FIG. 9 , illustrating the relative positions of the load ring and the installed key through the window of the collar in accordance with one embodiment of the present invention
- FIG. 11 is a cross-sectional view of the system of FIG. 9 , illustrating the securing of the load ring within the additional groove, following the removal of the key and rotation of the collar, to facilitate disconnection of the two connection members in accordance with one embodiment of the present invention
- FIG. 12 is a partial detail view generally taken along line 12 - 12 of FIG. 11 , illustrating the fastening of the load ring to the connection member via a pair of set screws in accordance with one embodiment of the present invention
- FIG. 13 is a cross-sectional view of the system of FIG. 11 , illustrating the removal of the connection members from one another in accordance with one embodiment of the present invention
- FIG. 14 is a front elevational view of a system including two connection members coupled to one another via a collar in accordance with certain embodiments of the present invention
- FIG. 15 is a cross-sectional view of one of the connection members of FIG. 14 , including a load ring disposed in a groove of the connection member and an anti-rotation rod that inhibits rotation of the load ring within the groove in accordance with one embodiment of the present invention;
- FIG. 16 is a cross-sectional view of the connection member of FIG. 15 following the coupling of a collar to the load ring and removal of the anti-rotation rod in accordance with one embodiment of the present invention
- FIG. 17 is a cross-sectional view of the system of FIG. 15 , illustrating the alignment of the connection member illustrated in FIG. 16 to an additional connection member having a load ring disposed in a groove and an anti-rotation rod, and illustrating the initial engagement of the collar with the load ring of the additional connection member in accordance with one embodiment of the present invention;
- FIG. 18 is a cross-sectional view of the system of FIG. 17 , illustrating the threading of the collar onto the lower load ring to draw the upper and lower load rings toward one another in accordance with one embodiment of the present invention
- FIG. 19 is a cross-sectional view of the system of FIG. 18 , illustrating further rotation of the collar to secure the connection members to one another via the two load rings in accordance with one embodiment of the present invention
- FIG. 20 is a cross-sectional view of the system of FIG. 19 , in which the viewing plane is offset about the axis of the system with respect to the viewing plane of FIG. 19 , illustrating alignment pins that may be provided in accordance with one embodiment of the present invention
- FIG. 21 is an exploded cross-sectional view of another exemplary connection system in accordance with one embodiment of the present invention.
- FIG. 22 is a cross-sectional view of the system of FIG. 21 , illustrating the alignment of the two connection members to one another in accordance with one embodiment of the present invention
- FIG. 23 is a cross-sectional view of the system of FIG. 22 , illustrating movement of the collar to engage a load ring in a lower connection member and a plurality of ring segments in an upper connection member in accordance with one embodiment of the present invention.
- FIG. 24 is a cross-sectional view of the system of FIG. 23 , illustrating the securing of the two connection members to one another via the load ring, the collar, and the plurality of ring segments in accordance with one embodiment of the present invention.
- the articles “a,” “an,” “the,” and “said” are intended to mean that there are one or more of the elements.
- the terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements.
- the use of “top,” “bottom,” “above,” “below,” and variations of these terms is made for convenience, but does not require any particular orientation of the components.
- FIGS. 1 and 2 an exemplary system 10 including a stab-type connector is illustrated in FIGS. 1 and 2 in accordance with one embodiment of the present invention.
- the exemplary system 10 includes a pair of connection members configured to be coupled to one another, such as a pin member or component 12 coupled to a box member or component 14 .
- the connector of the system 10 includes a union ring or collar 16 configured to cooperate with a load ring 50 and a locking key or cotter 60 to secure the pin member 12 to the box member 14 , as discussed in greater detail below.
- pin members or box members While certain components may be referred to herein as pin members or box members, it should be noted that such references are provided for the sake of clarity, and that such components (or features thereof) may be reversed in accordance with certain embodiments.
- the members 12 and 14 could instead be configured as a box member and a pin member, respectively, in full accordance with the present techniques.
- Either or both of the pin member 12 and the box member 14 may include various mounting features 18 , such as recesses, to facilitate coupling of such members to one or more additional components.
- the pin and box members 12 and 14 are configured to enable coupling of various tubular members to one another.
- each of the pin member 12 and the box member 14 may be coupled to a respective pipe via recesses or some other mounting features 18 , allowing the two pipes to be secured to one another via the connector.
- the pin and box members 12 and 14 could also be used to couple various other components together, such as a pipe to a wellhead component, a first wellhead component to a second wellhead component (e.g., in a stacked wellhead arrangement), or the like.
- the pin and box members 12 and 14 may be coupled to their respective components in any suitable fashion, including through threaded connections, studs, flanges, clamps, welding, or other mounting techniques. Indeed, in some embodiments, one or both of the pin and box members 12 and 14 may be provided as an integral part of such respective components.
- the pin member 12 is integrally formed as a portion of a wellhead and the box member 14 is coupled to or integral with a production tree (e.g., a “Christmas tree”) or other wellhead component to be mounted on the wellhead.
- a production tree e.g., a “Christmas tree”
- the presently-disclosed connection system may also be used to couple components unrelated to oil or gas production in full accordance with the present techniques.
- the box member 14 includes a bore 22 and the pin member 12 includes a bore 20 .
- Various additional components may be received within either or both of the bores 20 and 22 .
- various additional components 24 such as hangers, pipes, tubing, wellhead members, other fluid conduits, or the like may be received within the bores 20 and/or 22 of the box member 14 and the pin member 12 .
- the components 24 include a hanger and a fluid conduit that are secured within the bore 20 via locking rings 26 , though other securing means are also envisaged.
- the internal fluid conduit includes a bore 28 , which is generally aligned with the bore 22 when the pin and box members 12 and 14 are connected to one another.
- Various seals 30 and/or seal rings 32 may be provided throughout the system to inhibit fluid leakage from the various bores of the system 10 .
- the collar 16 is threaded onto the box member 14 via mating threaded surfaces 34 and 36 .
- the collar 16 may also include recesses 38 , which are configured to receive set screws that prevent further rotation of the collar 16 with respect to the box member 14 .
- the exemplary collar 16 is configured to receive an end 44 of the pin member 12 , in addition to a portion of the box member 14 , such that the pin member 12 and the box member 14 may be secured to one another in an end-to-end arrangement.
- the collar 16 also includes an aperture or window 40 that facilitates user access to the load ring 50 and installation of the key 60 to secure the pin and box members 12 and 14 to one another, as discussed in further detail below.
- the pin member 12 of one embodiment includes grooves 46 and 48 for receiving a load ring 50 and a locking key 60 ( FIG. 7 ).
- the load ring 50 as depicted in FIG. 3 in accordance with one embodiment of the present invention, is configured to engage the collar 16 when the pin member 12 (and at least a portion the groove 46 and/or 48 containing the load ring 50 ) is inserted into the collar 16 .
- the load ring 50 includes a grooved surface, such as a number of teeth or threads 52 configured to engage a plurality of complimentary teeth or threads 54 provided on an inner surface of the collar 16 .
- Such teeth 52 and 54 may be provided in various configurations, such as helical or other threads, rectangular teeth or angled teeth (as generally depicted in FIGS. 4 and 5 , respectively), or the like.
- the load ring 50 may be a split ring, such as a C-ring.
- the load ring 50 includes apertures 56 adjacent circumferential ends 58 (defined by a split in the load ring 50 ) that facilitate securing of the load ring 50 to the pin member 12 as discussed in greater detail below.
- the load ring 50 may initially be positioned within the groove 46 , as illustrated in FIG. 2 .
- the teeth or threads 54 of the collar 16 engage the mating surface of the load ring 50 and guide the load ring 50 from the upper groove 46 to the lower groove 48 , as generally depicted in FIG. 6 .
- a locking key or cotter 60 may be installed through the window 40 of the collar 16 and secured to the pin member 12 between opposing ends 58 of the load ring 50 , as generally illustrated in FIGS. 7 and 8 . It will be appreciated that, while the exemplary window 40 of FIG.
- the key 60 is secured within the groove 48 via one or more set screws 62 inserted through respective apertures 64 of the key 60 and into threaded recesses 66 of the pin member 12 .
- the key 60 may have a toothed and/or threaded outer surface, although a key 60 having some other outer surface contour may instead be employed in full accordance with the present techniques.
- the key 60 facilitates positive engagement of the load ring 50 with the collar 16 , and generally prevents the collar 16 from contracting within the groove 48 .
- the collar 16 may be rotated on the threads 34 of the box member 14 such that the load ring 50 is drawn from the groove 48 into the groove 46 and axial clearance, or “slack,” in the connection between the pin member 12 and the box member 14 is removed, as generally depicted in FIGS. 9 and 10 . Further, once such slack is removed, the collar 16 may be further rotated to preload the connection between the pin member 12 and the box member 14 .
- the groove 46 is sized such that positive engagement of the load ring 50 to the collar 16 is maintained not only by the installed key 60 , but also by the groove itself.
- the rotation of the collar 16 on the threads 34 is the only rotation needed in the system 10 to couple the pin member 12 to the box member 14 .
- a cover plate (not shown) may be provided over or within the window 40 to protect the connection between the collar 16 and the load ring 50 .
- the collar 16 , the load ring 50 and the locking key 60 are members of a low-profile, or slender, connector suitable for use in an array of connection applications, including those that may provide a limited amount of space for connecting various members, such as in certain conductor-sharing, split-compact, and/or stacked wellheads.
- the present system 10 allows for simple installation and coupling of two tubular members or components. Additionally, the pin and box members 12 and 14 may also be disconnected from one another in a simple and convenient fashion, as discussed below.
- FIGS. 11-13 an exemplary manner of uncoupling the pin member 12 from the box member 14 is generally illustrated in FIGS. 11-13 .
- the pin and box members 12 and 14 may be disengaged by removing the key 60 from the groove 48 via the window 40 , rotating the collar 16 to guide the load ring 50 from the groove 46 to the groove 48 , and securing the load ring 50 to the pin member 12 via the set screws 62 .
- the set screws 62 are removed from the key 60 (allowing the key 60 to be removed from the assembly through the window 40 ), and the set screws 62 are then inserted through the apertures 56 of the load ring 50 and into the recesses 66 to disengage the teeth or threads 52 from the mating teeth or threads 54 of the collar 16 .
- a C-clamp may be employed, such as in conjunction with a pair of mandrels temporarily inserted in the apertures 56 , to facilitate disengagement of the load ring 50 from the collar 16 , alignment of the apertures 58 with the recesses 66 , and securing of the load ring 50 to the pin member 12 via the set screws 62 .
- the key 60 may be removed prior to or following movement of the load ring 50 (via rotation of the collar 16 ) out of the groove 46 and into the groove 48 .
- the box member 14 may then be pulled apart from the pin member 12 , as generally represented by the arrow 68 in FIG. 13 .
- FIGS. 14-20 An exemplary connection system 80 is generally illustrated in FIGS. 14-20 in accordance with another embodiment of the present invention.
- the exemplary system 80 includes a pin member or component 82 that is configured to be coupled to a box member or component 84 via a collar 86 and load rings 96 and 126 , as discussed in greater detail below.
- the pin member 82 and the box member 84 may include respective flanges 88 and 90 to facilitate coupling of the members to other components, such as a pipe, a wellhead component, or the like.
- the pin and box members 82 and 84 may be coupled to other respective components in any suitable fashion, with or without flanges 88 and 90 , or may be provided as an integral part of such respective components.
- the system 80 may be employed to couple a production tree to a wellhead, although other applications are also envisaged.
- the box member 84 includes a plurality of mounting holes 92 in the flange 90 to facilitation attachment of the box member 84 to some other component, such as a production tree.
- the box member 84 also includes a bore 94 .
- the bore 94 is illustrated as a generally straight bore for the sake of clarity, it should be noted that additional components may be installed within the bore 94 , and that the bore 94 may have some other configuration, such as one similar or identical to the box member 14 ( FIG. 2 ), for example.
- a load ring 96 is disposed within a circumferential groove 98 in a surface of the box member 84 .
- the load ring 96 is a split load ring, such as a C-ring.
- an anti-rotation rod or pin 100 may be inserted through an aperture 102 of the box member 84 and a split in the load ring 96 , and into a recess 104 of the box member 84 .
- an end 106 of the anti-rotation rod 100 includes a threaded outer surface configured to engage a complimentary surface in the recess 102 to secure the anti-rotation rod 100 within the box member 84 . It may be appreciated that installation of the anti-rotation rod 100 in the box member 84 and between corresponding end portions of the load ring 96 generally prevents rotation of the load ring 96 within the groove 98 .
- the collar 86 (which includes grooved, threaded, or toothed surfaces 108 and 110 ) may be coupled to the box member 84 via the load ring 96 .
- the anti-rotation rod 100 generally prevents rotation of the load ring 96 while the collar 86 is threaded onto the load ring 96 via complimentary threaded surfaces 108 and 112 .
- the collar 86 may be secured to the load ring 96 in some additional or alternative manner, such as through the use of set screws 114 . Such set screws may be provided at one or more various points along the circumference of the collar 86 .
- the anti-rotation rod 100 may be removed from the box member 84 , such as generally illustrated in FIG. 16 . It should be noted that, upon removal of the anti-rotation rod 100 , the load ring 96 is free to rotate within the groove 98 , allowing complimentary rotation of the collar 86 about an end of the box member 84 without relative movement between the collar 86 and the load ring 96 .
- the box member 84 and the collar 86 may then be aligned over the pin member 82 , as generally illustrated in FIG. 17 .
- a plurality of mounting holes 122 may be provided in the flange 88 to facilitate coupling of the pin member 82 to other components, such as a wellhead component.
- the pin member 82 is presently illustrated with a generally straight bore 124 , it will be appreciated that the bore 124 may have other configurations in different embodiments, and that various components, such as hangers, tubing, or the like may be installed within the bore 124 , as similarly discussed above with respect to the bore 20 of the exemplary system 10 . Additionally, various components installed within the bore 124 may provide a plurality of separate bores for fluid conveyance. Seals 30 and/or seal rings 32 may be included at various locations in the system to inhibit fluid leakage from the bores of the system 80 .
- the pin member 82 includes a load ring 126 disposed within a circumferential groove 128 .
- the load ring 126 includes at least one split, such as in a C-ring or a multi-piece ring.
- An anti-rotation rod or pin 130 is installed through an aperture 132 , the groove 128 , and a split in the ring 126 , and into a recess 134 of the pin member 82 .
- the anti-rotation rod 130 may also include a threaded portion 136 configured to mate with a complimentary surface of the aperture 132 to secure the anti-rotation rod 130 within the pin member 82 .
- the anti-rotation rod 130 may be substantially similar to the anti-rotation rod 100 . Indeed, in one embodiment, the anti-rotation rod 100 may be removed from the box member 84 , as discussed above, and installed in place of the anti-rotation rod 130 within the pin member 82 .
- the collar 86 may be rotated such that the threaded surface 110 of the collar 86 engages a complimentary threaded surface 138 of the load ring 126 , as generally illustrated in FIG. 18 .
- the anti-rotation rod 130 inhibits rotation of the load ring 126 , causing rotation of the collar 86 in a first direction to induce axial movement of the load ring 126 within the groove 128 toward the load ring 96 .
- Continued rotation of the collar 86 in the same direction removes slack from the connection and secures the pin member 82 and the box member 84 to one another, as generally illustrated in FIG. 19 . It should be noted that the collar 86 may be still further rotated in the same direction to preload the connection.
- alignment pins 142 may be provided and configured to cooperate with respective recesses 144 and 146 to facilitate alignment of the pin and box members 82 and 84 during an exemplary coupling process, as generally illustrated in FIG. 20 . It should be noted that, as presently illustrated, such alignment pins 142 may be provided at different circumferential locations than the installation points for the anti-rotation rods 100 and 130 . Further, it will be appreciated that, in other embodiments, such alignment pins 142 may be formed integrally with either or both of the pin and box members 82 and 84 .
- Disconnection of the pin and box members 82 and 84 may be effected through rotation of the collar 86 (in a second direction opposite that discussed above), causing the load rings 96 and 126 to move away from one another and the collar 86 to disconnect from the load ring 126 , thus allowing the pin and box members 82 and 84 to be pulled apart from one another.
- FIGS. 21-24 An exemplary connection system 160 is generally illustrated in FIGS. 21-24 in accordance with an additional embodiment of the present invention.
- the exemplary system 160 includes a pin member or component 162 and a box member or component 164 configured to be coupled to one another by way of a collar 166 and load rings 180 and 190 , as discussed in greater detail below.
- the pin and box members 162 and 164 may be configured to be mounted to additional components or devices, such as wellhead components, production trees, pipes, other conduits, or the like.
- the pin and box members include flanges 168 and 172 having respective mounting holes 170 and 174 .
- the pin and box members 162 and 164 may be coupled to other respective components in any suitable fashion, or may be provided as an integral part of such respective components.
- the system 160 may be employed to couple a production tree to a wellhead, although the system may be employed to couple a variety of other components to one another.
- the pin and box members 162 and 164 may include a variety of bore configurations, and may be adapted to receive various additional components, as discussed above with respect to other embodiments.
- seals 30 and/or seal rings 32 may be provided throughout the system to inhibit fluid leakage from the various bores of the system 160 .
- a load ring 180 is disposed within a groove 182 of the box member 164 .
- the load ring 180 is a split load ring, such as a C-ring or, as depicted in the presently illustrated embodiment, a segmented load ring having a plurality of ring segments.
- a snap ring 183 may be provided to facilitate alignment of the various ring segments of the load ring 180 within the groove 182 .
- the collar 166 may be fitted over an end of the box member 164 and the load ring 180 , and then secured to the box member 164 .
- the collar 166 is secured directly to the body of the box member 164 via one or more set screws 184 inserted through respective apertures 186 .
- the collar 166 can be coupled to the box member 164 via other suitable techniques, including through connections formed with the load ring 180 .
- the pin member 162 also includes a load ring 190 disposed within a groove 192 .
- the load ring 190 includes a ring having at least one split, such as a C-ring or a multi-piece ring.
- An anti-rotation rod or pin 194 may be inserted through an aperture 196 and the split in the load ring 190 , and received in a recess 198 of the pin member 162 .
- the anti-rotation rod 194 may also include a threaded portion 200 configured to mate with a complimentary surface of the aperture 196 to secure the anti-rotation rod 194 within the pin member 162 .
- the anti-rotation rod 194 generally prevents rotation of the load ring 190 within the groove 192 .
- the box member 164 may be placed in axial alignment over the pin member 162 and the set screws 184 may be loosened such that the collar 166 is positioned against the load ring 190 and is free to move with respect to the box member 164 , as generally illustrated in FIG. 22 .
- the collar 166 may be moved to couple the collar 166 to the load ring 190 .
- the collar 166 is moved downwardly toward the load ring 190 and rotated to thread the collar 166 onto the load ring 190 via mating grooved or threaded surfaces 204 and 206 .
- the anti-rotation rod 194 generally prevents rotation of the load ring 190 with the collar 166 , causing the load ring 190 to be drawn into the collar 166 and toward the load ring 180 upon rotation of the collar in a first direction.
- a grooved portion 208 of the collar 166 may be configured to mate with one or more complimentary surfaces 210 of the load ring 180 .
- various ring segments of the load ring 180 slide down a tapered portion 212 of the groove 182 , facilitating positive engagement between the ring segments and the grooved portion 208 of the collar 166 , as generally illustrated in FIGS. 22 and 23 .
- continued rotation of the collar 166 draws the load rings 180 and 190 toward the sides of their respective grooves, removes slack from the connection, and secures the pin and box members 162 and 164 together, as generally illustrated in FIG. 24 .
- Further torque may be applied to the collar to provide a preloaded connection of the pin member 162 to the box member 164 .
- the pin and box members 162 and 164 may be disconnected by rotating the collar 166 in a second direction, opposite the first, until the collar 166 is free from the load ring 190 . Once free, the collar 166 may then be secured to the box member 164 , such as via set screws 184 , and the pin and box members 162 and 164 may be pulled apart from one another.
- certain embodiments of the present invention generally include low-profile connectors suitable for use in an array of connection applications, including those that may provide a limited amount of space for connecting various members, such as in certain conductor-sharing, split-compact, and/or stacked wellheads. Further, it will be appreciated that various embodiments of such connection systems may generally provide high-strength connectors that facilitate quick coupling and uncoupling of two tubular members or components.
Abstract
Various novel connectors are provided. In one embodiment, the connector includes a collar configured to receive first and second components. In this embodiment, the connector may also include a load ring configured to be received in a groove of the second component and to move into and out of engagement with the collar when the second component is received by the collar. The connector of this illustrative embodiment may also include a cotter configured for installation to the second component and to inhibit disengagement of the load ring from the collar. In some embodiments, engagement of the load ring and the collar effects securing of the first and second components to one another. Other devices, systems, and methods related to connectors are also disclosed.
Description
- This application is a continuation of U.S. Non-Provisional application Ser. No. 14/251,563, entitled “Connection Methods and Systems,” filed Apr. 11, 2014, which is herein incorporated by reference in its entirety, and which is a continuation of U.S. Non-Provisional application Ser. No. 13/707,574, entitled “Connection Methods and Systems,” filed Dec. 6, 2012, now U.S. Pat. No. 8,696,039, issued Apr. 15, 2014, which is herein incorporated by reference in its entirety, and which is a continuation of U.S. Non-Provisional application Ser. No. 12/746,922, entitled “Connection Methods and Systems,” filed Jun. 8, 2010, now U.S. Pat. No. 8,328,242, issued Dec. 11, 2012, which is herein incorporated by reference in its entirety, and which is a National Stage of PCT Patent Application No. PCT/US2009/030489, entitled “Connection Methods and Systems,” filed Jan. 8, 2009, which is herein incorporated by reference in its entirety, and which claims priority to and benefit of U.S. Provisional Patent Application No. 61/022,622, entitled “Connection Methods and Systems”, filed on Jan. 22, 2008, which is herein incorporated by reference in its entirety.
- The present invention relates generally to connection systems for various components, such as fluid conduits. More particularly, the present invention relates to various novel connectors for coupling a pair of components together in an end-to-end relationship.
- This section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present invention, which are described and/or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present invention. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art.
- As will be appreciated, oil and natural gas have a profound effect on modern economies and societies. Indeed, devices and systems that depend on oil and natural gas are ubiquitous. For instance, oil and natural gas are used for fuel in a wide variety of vehicles, such as cars, airplanes, boats, and the like. Further, oil and natural gas are frequently used to heat homes during winter, to generate electricity, and to manufacture an astonishing array of everyday products.
- In order to meet the demand for such natural resources, numerous companies invest significant amounts of time and money in searching for and extracting oil, natural gas, and other subterranean resources from the earth. Particularly, once a desired resource is discovered below the surface of the earth, drilling and production systems are often employed to access and extract the resource. These systems may be located onshore or offshore depending on the location of a desired resource. Further, such systems generally include a wellhead assembly through which the resource is extracted. These wellhead assemblies may include a wide variety of components and/or conduits, such as various casings, valves, and the like, that control drilling and/or extraction operations. Additionally, various production and transport systems may also employ pipes or other fluid conduits, in addition to the components noted above.
- As will be appreciated, various fluid conduits or other components of a production or transport system are typically coupled to one another to enable oil, gas, or the like to be extracted from the ground and routed to a desired location. Such fluid conduits (or “tubular members”) are often coupled together in end-to-end relationships via various connectors that facilitate flow of oil, gas, or the like between the conduits. In some instances, these connectors may be subjected to large axial loads, such as gravity (particularly in the case of suspended conduits) or internal pressures within the conduits. Also, it will be appreciated that the space available for connecting conduit members may be limited in some applications. Consequently, there is a need for durable connectors that, among other things, have low profiles, provide sealed connections between two components (e.g., fluid conduits), and can withstand the axial loads expected within a given system.
- Certain aspects commensurate in scope with the originally claimed invention are set forth below. It should be understood that these aspects are presented merely to provide the reader with a brief summary of certain forms the invention might take and that these aspects are not intended to limit the scope of the invention. Indeed, the invention may encompass a variety of aspects that may not be set forth below.
- Embodiments of the present invention generally relate to novel connectors for joining two components, such as tubular members or conduits. In some exemplary embodiments, the exemplary connector includes a collar configured to receive each of the two components in an end-to-end arrangement. In one embodiment, the collar is configured to be threaded onto a first of the two components and to be coupled to the second of the two components via a load ring disposed between the collar and the second component. In such an embodiment, a locking key or cotter may be installed to facilitate positive engagement of the load ring with the collar.
- In other embodiments, load rings may be provided in grooves of both of the two components to facilitate locking of the components to one another. In one embodiment, one or more anti-rotation rods may be installed, either permanently or temporarily, in either or both of the grooves to prevent rotation of the load rings during engagement by a collar. In various embodiments, the load rings may comprise C-rings, segmented rings, other split rings, or the like. Additionally, in various embodiments, rotation of the collar effects axial movement of one or both of the load rings to secure the two components to one another.
- Various refinements of the features noted above may exist in relation to various aspects of the present invention. Further features may also be incorporated in these various aspects as well. These refinements and additional features may exist individually or in any combination. For instance, various features discussed below in relation to one or more of the illustrated embodiments may be incorporated into any of the above-described aspects of the present invention alone or in any combination. Again, the brief summary presented above is intended only to familiarize the reader with certain aspects and contexts of the present invention without limitation to the claimed subject matter.
- These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:
-
FIG. 1 is a front elevational view of a system including two connection members coupled to one another via a collar in accordance with one embodiment of the present invention; -
FIG. 2 is an exploded cross-sectional view of the system ofFIG. 1 , illustrating various features of the exemplary system, including a load ring disposed in a groove of one of the connection members, in accordance with one embodiment of the present invention; -
FIG. 3 is a perspective view of an exemplary load ring in accordance with one embodiment of the present invention; -
FIG. 4 illustrates an exemplary toothed surface of the load ring ofFIG. 3 that may be provided in accordance with certain embodiments of the present invention; -
FIG. 5 illustrates a different exemplary toothed surface of the load ring ofFIG. 3 in accordance with certain embodiments of the present invention; -
FIG. 6 is a cross-sectional view of the system ofFIG. 2 , illustrating the stabbing of one connection member to the other connection member and the movement of the load ring into an additional groove in accordance with one embodiment of the present invention; -
FIG. 7 is a cross-sectional view of the system ofFIG. 6 , illustrating the installation of a key through a window of the collar and within the additional groove in accordance with one embodiment of the present invention; -
FIG. 8 is a partial detail view generally taken along line 8-8 ofFIG. 7 , illustrating the key secured to the connection member with a pair of set screws and portions of the load ring accessible through the window of the collar in accordance with one embodiment of the present invention; -
FIG. 9 is a cross-sectional view of the system ofFIG. 7 , illustrating the rotation of the collar to draw the load ring away from the installed key and into the upper groove of the connection member in accordance with one embodiment of the present invention; -
FIG. 10 is a partial detail view generally taken along line 10-10 ofFIG. 9 , illustrating the relative positions of the load ring and the installed key through the window of the collar in accordance with one embodiment of the present invention; -
FIG. 11 is a cross-sectional view of the system ofFIG. 9 , illustrating the securing of the load ring within the additional groove, following the removal of the key and rotation of the collar, to facilitate disconnection of the two connection members in accordance with one embodiment of the present invention; -
FIG. 12 is a partial detail view generally taken along line 12-12 ofFIG. 11 , illustrating the fastening of the load ring to the connection member via a pair of set screws in accordance with one embodiment of the present invention; -
FIG. 13 is a cross-sectional view of the system ofFIG. 11 , illustrating the removal of the connection members from one another in accordance with one embodiment of the present invention; -
FIG. 14 is a front elevational view of a system including two connection members coupled to one another via a collar in accordance with certain embodiments of the present invention; -
FIG. 15 is a cross-sectional view of one of the connection members ofFIG. 14 , including a load ring disposed in a groove of the connection member and an anti-rotation rod that inhibits rotation of the load ring within the groove in accordance with one embodiment of the present invention; -
FIG. 16 is a cross-sectional view of the connection member ofFIG. 15 following the coupling of a collar to the load ring and removal of the anti-rotation rod in accordance with one embodiment of the present invention; -
FIG. 17 is a cross-sectional view of the system ofFIG. 15 , illustrating the alignment of the connection member illustrated inFIG. 16 to an additional connection member having a load ring disposed in a groove and an anti-rotation rod, and illustrating the initial engagement of the collar with the load ring of the additional connection member in accordance with one embodiment of the present invention; -
FIG. 18 is a cross-sectional view of the system ofFIG. 17 , illustrating the threading of the collar onto the lower load ring to draw the upper and lower load rings toward one another in accordance with one embodiment of the present invention; -
FIG. 19 is a cross-sectional view of the system ofFIG. 18 , illustrating further rotation of the collar to secure the connection members to one another via the two load rings in accordance with one embodiment of the present invention; -
FIG. 20 is a cross-sectional view of the system ofFIG. 19 , in which the viewing plane is offset about the axis of the system with respect to the viewing plane ofFIG. 19 , illustrating alignment pins that may be provided in accordance with one embodiment of the present invention; -
FIG. 21 is an exploded cross-sectional view of another exemplary connection system in accordance with one embodiment of the present invention; -
FIG. 22 is a cross-sectional view of the system ofFIG. 21 , illustrating the alignment of the two connection members to one another in accordance with one embodiment of the present invention; -
FIG. 23 is a cross-sectional view of the system ofFIG. 22 , illustrating movement of the collar to engage a load ring in a lower connection member and a plurality of ring segments in an upper connection member in accordance with one embodiment of the present invention; and -
FIG. 24 is a cross-sectional view of the system ofFIG. 23 , illustrating the securing of the two connection members to one another via the load ring, the collar, and the plurality of ring segments in accordance with one embodiment of the present invention. - One or more specific embodiments of the present invention will be described below. In an effort to provide a concise description of these embodiments, all features of an actual implementation may not be described in the specification. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
- When introducing elements of various embodiments of the present invention, the articles “a,” “an,” “the,” and “said” are intended to mean that there are one or more of the elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements. Moreover, the use of “top,” “bottom,” “above,” “below,” and variations of these terms is made for convenience, but does not require any particular orientation of the components.
- Turning now to the present figures, an
exemplary system 10 including a stab-type connector is illustrated inFIGS. 1 and 2 in accordance with one embodiment of the present invention. Theexemplary system 10 includes a pair of connection members configured to be coupled to one another, such as a pin member orcomponent 12 coupled to a box member orcomponent 14. In one embodiment, the connector of thesystem 10 includes a union ring orcollar 16 configured to cooperate with aload ring 50 and a locking key orcotter 60 to secure thepin member 12 to thebox member 14, as discussed in greater detail below. While certain components may be referred to herein as pin members or box members, it should be noted that such references are provided for the sake of clarity, and that such components (or features thereof) may be reversed in accordance with certain embodiments. For instance, in one embodiment, themembers - Either or both of the
pin member 12 and thebox member 14 may include various mounting features 18, such as recesses, to facilitate coupling of such members to one or more additional components. In some embodiments, the pin andbox members pin member 12 and thebox member 14 may be coupled to a respective pipe via recesses or some other mounting features 18, allowing the two pipes to be secured to one another via the connector. Similarly, the pin andbox members - While the mounting features 18 in the presently illustrated embodiment include recesses configured to receive a fastener, it will be appreciated that the pin and
box members box members pin member 12 is integrally formed as a portion of a wellhead and thebox member 14 is coupled to or integral with a production tree (e.g., a “Christmas tree”) or other wellhead component to be mounted on the wellhead. While certain embodiments may be described in an oil or gas (or other resource) production context, it should be noted that the presently-disclosed connection system may also be used to couple components unrelated to oil or gas production in full accordance with the present techniques. - In the presently illustrated embodiment, the
box member 14 includes abore 22 and thepin member 12 includes abore 20. Various additional components may be received within either or both of thebores additional components 24, such as hangers, pipes, tubing, wellhead members, other fluid conduits, or the like may be received within thebores 20 and/or 22 of thebox member 14 and thepin member 12. In the presently illustrated embodiment, thecomponents 24 include a hanger and a fluid conduit that are secured within thebore 20 via locking rings 26, though other securing means are also envisaged. In one embodiment, the internal fluid conduit includes abore 28, which is generally aligned with thebore 22 when the pin andbox members Various seals 30 and/or seal rings 32 may be provided throughout the system to inhibit fluid leakage from the various bores of thesystem 10. - In one embodiment, to facilitate coupling of the
pin member 12 and thebox member 14, thecollar 16 is threaded onto thebox member 14 via mating threaded surfaces 34 and 36. Thecollar 16 may also includerecesses 38, which are configured to receive set screws that prevent further rotation of thecollar 16 with respect to thebox member 14. Theexemplary collar 16 is configured to receive anend 44 of thepin member 12, in addition to a portion of thebox member 14, such that thepin member 12 and thebox member 14 may be secured to one another in an end-to-end arrangement. Notably, in the presently illustrated embodiment, thecollar 16 also includes an aperture orwindow 40 that facilitates user access to theload ring 50 and installation of the key 60 to secure the pin andbox members - To facilitate locking of the pin and
box members pin member 12 of one embodiment includesgrooves load ring 50 and a locking key 60 (FIG. 7 ). Theload ring 50, as depicted inFIG. 3 in accordance with one embodiment of the present invention, is configured to engage thecollar 16 when the pin member 12 (and at least a portion thegroove 46 and/or 48 containing the load ring 50) is inserted into thecollar 16. In some embodiments, theload ring 50 includes a grooved surface, such as a number of teeth orthreads 52 configured to engage a plurality of complimentary teeth orthreads 54 provided on an inner surface of thecollar 16.Such teeth FIGS. 4 and 5 , respectively), or the like. In some embodiments, theload ring 50 may be a split ring, such as a C-ring. Additionally, in one embodiment, theload ring 50 includesapertures 56 adjacent circumferential ends 58 (defined by a split in the load ring 50) that facilitate securing of theload ring 50 to thepin member 12 as discussed in greater detail below. - The
load ring 50 may initially be positioned within thegroove 46, as illustrated inFIG. 2 . In one embodiment, when the pin andbox members threads 54 of thecollar 16 engage the mating surface of theload ring 50 and guide theload ring 50 from theupper groove 46 to thelower groove 48, as generally depicted inFIG. 6 . Once theload ring 50 is moved into thegroove 48, a locking key orcotter 60 may be installed through thewindow 40 of thecollar 16 and secured to thepin member 12 between opposing ends 58 of theload ring 50, as generally illustrated inFIGS. 7 and 8 . It will be appreciated that, while theexemplary window 40 ofFIG. 8 is presently illustrated as a generally rectangular window, other configurations (e.g., elliptical, circular, or the like) may also be employed. In one embodiment, the key 60 is secured within thegroove 48 via one ormore set screws 62 inserted throughrespective apertures 64 of the key 60 and into threadedrecesses 66 of thepin member 12. The key 60 may have a toothed and/or threaded outer surface, although a key 60 having some other outer surface contour may instead be employed in full accordance with the present techniques. The key 60 facilitates positive engagement of theload ring 50 with thecollar 16, and generally prevents thecollar 16 from contracting within thegroove 48. - In some embodiments, following installation of the key 60 within the
groove 48, thecollar 16 may be rotated on thethreads 34 of thebox member 14 such that theload ring 50 is drawn from thegroove 48 into thegroove 46 and axial clearance, or “slack,” in the connection between thepin member 12 and thebox member 14 is removed, as generally depicted inFIGS. 9 and 10 . Further, once such slack is removed, thecollar 16 may be further rotated to preload the connection between thepin member 12 and thebox member 14. In some embodiments, thegroove 46 is sized such that positive engagement of theload ring 50 to thecollar 16 is maintained not only by the installed key 60, but also by the groove itself. Also, in at least one embodiment, the rotation of thecollar 16 on thethreads 34 is the only rotation needed in thesystem 10 to couple thepin member 12 to thebox member 14. A cover plate (not shown) may be provided over or within thewindow 40 to protect the connection between thecollar 16 and theload ring 50. - It should be noted that, in the presently illustrated embodiment, the
collar 16, theload ring 50 and the lockingkey 60 are members of a low-profile, or slender, connector suitable for use in an array of connection applications, including those that may provide a limited amount of space for connecting various members, such as in certain conductor-sharing, split-compact, and/or stacked wellheads. Further, it will be appreciated that thepresent system 10 allows for simple installation and coupling of two tubular members or components. Additionally, the pin andbox members - For instance, an exemplary manner of uncoupling the
pin member 12 from thebox member 14 is generally illustrated inFIGS. 11-13 . In some embodiments, the pin andbox members groove 48 via thewindow 40, rotating thecollar 16 to guide theload ring 50 from thegroove 46 to thegroove 48, and securing theload ring 50 to thepin member 12 via the set screws 62. For example, in one embodiment, theset screws 62 are removed from the key 60 (allowing the key 60 to be removed from the assembly through the window 40), and theset screws 62 are then inserted through theapertures 56 of theload ring 50 and into therecesses 66 to disengage the teeth orthreads 52 from the mating teeth orthreads 54 of thecollar 16. In one embodiment, a C-clamp may be employed, such as in conjunction with a pair of mandrels temporarily inserted in theapertures 56, to facilitate disengagement of theload ring 50 from thecollar 16, alignment of theapertures 58 with therecesses 66, and securing of theload ring 50 to thepin member 12 via the set screws 62. Depending on the relative size of thewindow 40 and the area to which it provides access, the key 60 may be removed prior to or following movement of the load ring 50 (via rotation of the collar 16) out of thegroove 46 and into thegroove 48. Thebox member 14 may then be pulled apart from thepin member 12, as generally represented by thearrow 68 inFIG. 13 . - An
exemplary connection system 80 is generally illustrated inFIGS. 14-20 in accordance with another embodiment of the present invention. Theexemplary system 80 includes a pin member orcomponent 82 that is configured to be coupled to a box member orcomponent 84 via acollar 86 and load rings 96 and 126, as discussed in greater detail below. Thepin member 82 and thebox member 84 may includerespective flanges exemplary system 10, the pin andbox members flanges system 80 may be employed to couple a production tree to a wellhead, although other applications are also envisaged. - Additional details of the
exemplary system 80, as well as an exemplary method for coupling the pin andbox members FIGS. 15-20 . In the embodiment illustrated inFIG. 15 , thebox member 84 includes a plurality of mountingholes 92 in theflange 90 to facilitation attachment of thebox member 84 to some other component, such as a production tree. Thebox member 84 also includes abore 94. Although thebore 94 is illustrated as a generally straight bore for the sake of clarity, it should be noted that additional components may be installed within thebore 94, and that thebore 94 may have some other configuration, such as one similar or identical to the box member 14 (FIG. 2 ), for example. - In one embodiment, a
load ring 96 is disposed within acircumferential groove 98 in a surface of thebox member 84. In some embodiments, theload ring 96 is a split load ring, such as a C-ring. In such embodiments, an anti-rotation rod or pin 100 may be inserted through anaperture 102 of thebox member 84 and a split in theload ring 96, and into arecess 104 of thebox member 84. In one embodiment, anend 106 of theanti-rotation rod 100 includes a threaded outer surface configured to engage a complimentary surface in therecess 102 to secure theanti-rotation rod 100 within thebox member 84. It may be appreciated that installation of theanti-rotation rod 100 in thebox member 84 and between corresponding end portions of theload ring 96 generally prevents rotation of theload ring 96 within thegroove 98. - Once the
load ring 96 and theanti-rotation rod 100 are installed in thebox member 84, the collar 86 (which includes grooved, threaded, ortoothed surfaces 108 and 110) may be coupled to thebox member 84 via theload ring 96. For instance, in one embodiment, theanti-rotation rod 100 generally prevents rotation of theload ring 96 while thecollar 86 is threaded onto theload ring 96 via complimentary threadedsurfaces collar 86 may be secured to theload ring 96 in some additional or alternative manner, such as through the use ofset screws 114. Such set screws may be provided at one or more various points along the circumference of thecollar 86. Once thecollar 86 is secured to theload ring 96, theanti-rotation rod 100 may be removed from thebox member 84, such as generally illustrated inFIG. 16 . It should be noted that, upon removal of theanti-rotation rod 100, theload ring 96 is free to rotate within thegroove 98, allowing complimentary rotation of thecollar 86 about an end of thebox member 84 without relative movement between thecollar 86 and theload ring 96. - The
box member 84 and thecollar 86 may then be aligned over thepin member 82, as generally illustrated inFIG. 17 . Similar to theflange 90 of thebox member 84, a plurality of mountingholes 122 may be provided in theflange 88 to facilitate coupling of thepin member 82 to other components, such as a wellhead component. While thepin member 82 is presently illustrated with a generallystraight bore 124, it will be appreciated that thebore 124 may have other configurations in different embodiments, and that various components, such as hangers, tubing, or the like may be installed within thebore 124, as similarly discussed above with respect to thebore 20 of theexemplary system 10. Additionally, various components installed within thebore 124 may provide a plurality of separate bores for fluid conveyance.Seals 30 and/or seal rings 32 may be included at various locations in the system to inhibit fluid leakage from the bores of thesystem 80. - In the presently illustrated embodiment, the
pin member 82 includes aload ring 126 disposed within acircumferential groove 128. Further, in one embodiment, theload ring 126 includes at least one split, such as in a C-ring or a multi-piece ring. An anti-rotation rod orpin 130 is installed through anaperture 132, thegroove 128, and a split in thering 126, and into arecess 134 of thepin member 82. Theanti-rotation rod 130 may also include a threadedportion 136 configured to mate with a complimentary surface of theaperture 132 to secure theanti-rotation rod 130 within thepin member 82. In some embodiments, theanti-rotation rod 130 may be substantially similar to theanti-rotation rod 100. Indeed, in one embodiment, theanti-rotation rod 100 may be removed from thebox member 84, as discussed above, and installed in place of theanti-rotation rod 130 within thepin member 82. - Once the pin and
box members collar 86 may be rotated such that the threadedsurface 110 of thecollar 86 engages a complimentary threadedsurface 138 of theload ring 126, as generally illustrated inFIG. 18 . Notably, theanti-rotation rod 130 inhibits rotation of theload ring 126, causing rotation of thecollar 86 in a first direction to induce axial movement of theload ring 126 within thegroove 128 toward theload ring 96. Continued rotation of thecollar 86 in the same direction removes slack from the connection and secures thepin member 82 and thebox member 84 to one another, as generally illustrated inFIG. 19 . It should be noted that thecollar 86 may be still further rotated in the same direction to preload the connection. - In one embodiment, alignment pins 142 may be provided and configured to cooperate with
respective recesses box members FIG. 20 . It should be noted that, as presently illustrated, such alignment pins 142 may be provided at different circumferential locations than the installation points for theanti-rotation rods box members box members collar 86 to disconnect from theload ring 126, thus allowing the pin andbox members - An
exemplary connection system 160 is generally illustrated inFIGS. 21-24 in accordance with an additional embodiment of the present invention. Theexemplary system 160 includes a pin member orcomponent 162 and a box member orcomponent 164 configured to be coupled to one another by way of acollar 166 and load rings 180 and 190, as discussed in greater detail below. The pin andbox members flanges holes box members system 160 may be employed to couple a production tree to a wellhead, although the system may be employed to couple a variety of other components to one another. Additionally, although illustrated with generally-straight bores, it will be appreciated that the pin andbox members system 160. - In one embodiment, a
load ring 180 is disposed within agroove 182 of thebox member 164. In some embodiments, theload ring 180 is a split load ring, such as a C-ring or, as depicted in the presently illustrated embodiment, a segmented load ring having a plurality of ring segments. In the case of the latter, asnap ring 183 may be provided to facilitate alignment of the various ring segments of theload ring 180 within thegroove 182. Thecollar 166 may be fitted over an end of thebox member 164 and theload ring 180, and then secured to thebox member 164. In one embodiment, thecollar 166 is secured directly to the body of thebox member 164 via one ormore set screws 184 inserted throughrespective apertures 186. In other embodiments, thecollar 166 can be coupled to thebox member 164 via other suitable techniques, including through connections formed with theload ring 180. - In some embodiments, the
pin member 162 also includes aload ring 190 disposed within agroove 192. Further, in the presently illustrated embodiment, theload ring 190 includes a ring having at least one split, such as a C-ring or a multi-piece ring. An anti-rotation rod or pin 194 may be inserted through anaperture 196 and the split in theload ring 190, and received in arecess 198 of thepin member 162. Theanti-rotation rod 194 may also include a threadedportion 200 configured to mate with a complimentary surface of theaperture 196 to secure theanti-rotation rod 194 within thepin member 162. As similarly discussed above, theanti-rotation rod 194 generally prevents rotation of theload ring 190 within thegroove 192. - Subsequently, the
box member 164 may be placed in axial alignment over thepin member 162 and theset screws 184 may be loosened such that thecollar 166 is positioned against theload ring 190 and is free to move with respect to thebox member 164, as generally illustrated inFIG. 22 . Thecollar 166 may be moved to couple thecollar 166 to theload ring 190. For example, in one embodiment, thecollar 166 is moved downwardly toward theload ring 190 and rotated to thread thecollar 166 onto theload ring 190 via mating grooved or threadedsurfaces anti-rotation rod 194 generally prevents rotation of theload ring 190 with thecollar 166, causing theload ring 190 to be drawn into thecollar 166 and toward theload ring 180 upon rotation of the collar in a first direction. - Additionally, a
grooved portion 208 of thecollar 166 may be configured to mate with one or morecomplimentary surfaces 210 of theload ring 180. In one embodiment, various ring segments of theload ring 180 slide down a taperedportion 212 of thegroove 182, facilitating positive engagement between the ring segments and thegrooved portion 208 of thecollar 166, as generally illustrated inFIGS. 22 and 23 . As a result of the mating engagement of thecollar 166 with both load rings 180 and 190, continued rotation of thecollar 166 draws the load rings 180 and 190 toward the sides of their respective grooves, removes slack from the connection, and secures the pin andbox members FIG. 24 . Further torque may be applied to the collar to provide a preloaded connection of thepin member 162 to thebox member 164. The pin andbox members collar 166 in a second direction, opposite the first, until thecollar 166 is free from theload ring 190. Once free, thecollar 166 may then be secured to thebox member 164, such as viaset screws 184, and the pin andbox members - It should be noted that certain embodiments of the present invention generally include low-profile connectors suitable for use in an array of connection applications, including those that may provide a limited amount of space for connecting various members, such as in certain conductor-sharing, split-compact, and/or stacked wellheads. Further, it will be appreciated that various embodiments of such connection systems may generally provide high-strength connectors that facilitate quick coupling and uncoupling of two tubular members or components.
- While the invention may be susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and have been described in detail herein. However, it should be understood that the invention is not intended to be limited to the particular forms disclosed. Rather, the invention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following appended claims.
Claims (21)
1-20. (canceled)
21. A system, comprising:
a first tubular component;
a second tubular component disposed at least partially about the first tubular component, wherein the second tubular component comprises a window;
a split ring disposed between the first and second tubular components, wherein the split ring has a split between first and second circumferential end portions;
a locking key disposed in the split between the first and second circumferential end portions, wherein the window is configured to provide access to the locking key.
22. The system of claim 21 , wherein the locking key is secured by at least one fastener.
23. The system of claim 22 , wherein the at least one fastener couples the locking key to the first tubular component.
24. The system of claim 22 , wherein the at least one fastener comprises one or more threaded fasteners.
25. The system of claim 22 , wherein the locking key is configured to be removed through the window after releasing the at least one fastener.
26. The system of claim 25 , wherein the split ring is configured to move from an expanded configuration to a contracted configuration by moving the first and second circumferential end portions toward one another after removing the locking key, and the first and second circumferential end portions are configured to be secured in the contracted configuration.
27. The system of claim 26 , wherein a first fastener is configured to secure the first circumferential end portion in the contracted configuration, and a second fastener is configured to secure the second circumferential end portion in the contracted configuration.
28. The system of claim 21 , wherein the first circumferential end portion comprises a first fastener receptacle configure to receive a first fastener, and the second circumferential end portion comprises a second fastener receptacle configure to receive a second fastener.
29. The system of claim 21 , wherein the split ring comprises a C-ring.
30. The system of claim 21 , wherein the split ring is configured to extend into a first groove in the first tubular component.
31. The system of claim 30 , wherein the system is configured to move the split ring in an axial direction between the first groove and a second groove in the first tubular component.
32. The system of claim 31 , wherein the system is configured to move the split ring between the first and second grooves via rotation of the second tubular component relative to the first tubular component.
33. The system of claim 32 , wherein the first tubular component has first threads coupled to second threads of the second tubular component.
34. The system of claim 21 , wherein the split ring comprises teeth or threads engaged with mating teeth or threads.
35. The system of claim 34 , wherein the mating teeth or threads are disposed on the second tubular component.
36. The system of claim 21 , wherein the first and second tubular components comprises respective first and second mineral extraction components.
37. A system, comprising:
a split ring configured to be disposed between the first and second tubular components, wherein the split ring has a split between first and second circumferential end portions, the first circumferential end portion comprises a first fastener receptacle configure to receive a first fastener, and the second circumferential end portion comprises a second fastener receptacle configure to receive a second fastener; and
a locking key configured to be disposed in the split between the first and second circumferential end portions.
38. The system of claim 37 , wherein a window in the second tubular component is configured to provide access to the locking key.
39. The system of claim 37 , wherein the split ring comprises a C-ring, and the locking key comprises one or more fastener receptacles each configured to receive a corresponding fastener.
40. A method, comprising:
positioning a split ring between first and second tubular components, wherein the split ring has a split between first and second circumferential end portions, the second tubular component is disposed at least partially about the first tubular component, and the second tubular component comprises a window; and
inserting a locking key in the split between the first and second circumferential end portions, wherein the window is configured to provide access to the locking key.
Priority Applications (1)
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US15/805,061 US20180119853A1 (en) | 2008-01-22 | 2017-11-06 | Connection methods and systems |
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US2262208P | 2008-01-22 | 2008-01-22 | |
PCT/US2009/030489 WO2009094245A2 (en) | 2008-01-22 | 2009-01-08 | Connection methods and systems |
US74692210A | 2010-06-08 | 2010-06-08 | |
US13/707,574 US8696039B2 (en) | 2008-01-22 | 2012-12-06 | Connection methods and systems |
US14/251,563 US9810354B2 (en) | 2008-01-22 | 2014-04-11 | Connection methods and systems |
US15/805,061 US20180119853A1 (en) | 2008-01-22 | 2017-11-06 | Connection methods and systems |
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US14/251,563 Continuation US9810354B2 (en) | 2008-01-22 | 2014-04-11 | Connection methods and systems |
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US13/707,574 Active US8696039B2 (en) | 2008-01-22 | 2012-12-06 | Connection methods and systems |
US14/251,563 Active 2029-09-15 US9810354B2 (en) | 2008-01-22 | 2014-04-11 | Connection methods and systems |
US15/805,061 Abandoned US20180119853A1 (en) | 2008-01-22 | 2017-11-06 | Connection methods and systems |
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US13/707,574 Active US8696039B2 (en) | 2008-01-22 | 2012-12-06 | Connection methods and systems |
US14/251,563 Active 2029-09-15 US9810354B2 (en) | 2008-01-22 | 2014-04-11 | Connection methods and systems |
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US (4) | US8328242B2 (en) |
GB (2) | GB2468999B (en) |
NO (1) | NO20100952L (en) |
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GB2468999B (en) * | 2008-01-22 | 2012-08-08 | Cameron Int Corp | Connection methods and systems |
SG173535A1 (en) * | 2009-03-31 | 2011-09-29 | Cameron Int Corp | Multi-component tubular coupling for wellhead systems |
WO2012174571A2 (en) | 2011-06-17 | 2012-12-20 | David L. Abney, Inc. | Subterranean tool with sealed electronic passage across multiple sections |
US9011255B1 (en) * | 2011-07-22 | 2015-04-21 | Crossford International, Llc | Drive shaft coupling having sealed interior passage for pressurized fluid |
WO2016186514A1 (en) * | 2015-05-20 | 2016-11-24 | Hellenes Subsea As | Seal and pipe carrier unit for a subsea pipe connection |
US9951821B1 (en) * | 2017-01-11 | 2018-04-24 | Crossford International, Llc | Drive shaft coupling |
PL231686B1 (en) * | 2017-02-09 | 2019-03-29 | Bitron Poland Spolka Z Ograniczona Odpowiedzialnoscia | Connection device for coupling tubular element with the threaded service pipe, in particular for washing machines |
CN107448163B (en) * | 2017-09-14 | 2023-05-26 | 长江大学 | Deepwater gravity type spiral automatic connector |
US11428053B1 (en) * | 2019-09-09 | 2022-08-30 | Vault Pressure Control, Llc | System for connecting piping systems for hydraulic fracturing of oil and gas wells |
EP3910160B1 (en) * | 2020-05-12 | 2023-11-15 | BAUER Maschinen GmbH | Drill string coupling and method for operating the drill string coupling |
US11959339B2 (en) * | 2020-12-17 | 2024-04-16 | McClinton Energy Group, LLC | Cementing adapter systems and methods |
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Also Published As
Publication number | Publication date |
---|---|
GB2485925A (en) | 2012-05-30 |
US20140217724A1 (en) | 2014-08-07 |
WO2009094245A2 (en) | 2009-07-30 |
GB2468999A (en) | 2010-09-29 |
NO20100952L (en) | 2010-07-30 |
BRPI0906502A2 (en) | 2021-02-23 |
WO2009094245A3 (en) | 2009-12-30 |
US20100264648A1 (en) | 2010-10-21 |
GB201012210D0 (en) | 2010-09-08 |
US8328242B2 (en) | 2012-12-11 |
GB2468999B (en) | 2012-08-08 |
US8696039B2 (en) | 2014-04-15 |
US20130093183A1 (en) | 2013-04-18 |
US9810354B2 (en) | 2017-11-07 |
GB2485925B (en) | 2012-10-10 |
GB201202686D0 (en) | 2012-04-04 |
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