US20030098150A1 - Mast and trolley arrangement for mobile multi-function rig - Google Patents
Mast and trolley arrangement for mobile multi-function rig Download PDFInfo
- Publication number
- US20030098150A1 US20030098150A1 US10/232,393 US23239302A US2003098150A1 US 20030098150 A1 US20030098150 A1 US 20030098150A1 US 23239302 A US23239302 A US 23239302A US 2003098150 A1 US2003098150 A1 US 2003098150A1
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- US
- United States
- Prior art keywords
- mast
- trolley
- rig
- top drive
- injector
- 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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- 238000005553 drilling Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 abstract description 6
- 238000010168 coupling process Methods 0.000 abstract description 6
- 238000005859 coupling reaction Methods 0.000 abstract description 6
- 239000003381 stabilizer Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/02—Rod or cable suspensions
- E21B19/06—Elevators, i.e. rod- or tube-gripping devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
Abstract
An improved mast arrangement for a mobile multi-function rig has a winch line extending from an upper end of the mast and a traveling block supported thereon. A trolley mountable on the mast is adapted for coupling to the traveling block. The trolley works primarily as a guide for a given load, and therefore is of a lightweight design since loads mounted to the trolley are transferred directly to the traveling block and the supporting winch line. The trolley provides the capability to readily switch between various rig operations, including manipulating coiled tubing with an injector, setting surface casing using a top drive, operating the winch and traveling block for joined pipe operations, and interchanging between top drive and joined pipe operations without removing the top drive from the mast or rig. The rig can run deeper joined pipe applications than previous mobile rigs by providing means for employing the top drive, namely the trolley is adapted to counteract the torsion exerted by the top drive during operation. The trolley is able to work the entire length of the mast after quickly parking the injector near the bottom of the mast. The winch and traveling block have unobstructed travel along the entire length of the mast without disengaging the trolley from the mast and with the injector parked near the bottom end.
Description
- The present invention relates to drilling and servicing equipment for oil and gas wells generally, and in particular relates to an improved mast and trolley design for use in rigs which transport and/or operate equipment for continuous coiled tubing drilling, for conventional joined pipe handling and drilling, and/or for wireline applications.
- Our co-pending U.S. patent application Ser. No. 09/688,979 and corresponding Canadian patent application 2,322,917 for a “Trolley and Traveling Block System” disclose a novel trolley hoisting system for use in rigs, particularly multi-task rigs, which transport and/or operate equipment for oil and gas operations, including continuous coiled tubing drilling and conventional joined pipe handling and drilling operations. The novel system allows a single winch arrangement to perform various tasks without having to detach from or connect to the injector, as in some conventional rig arrangements, when switching between tasks. In particular, the winch system is capable of moving the injector along the rig's mast, or derrick, and, upon fixing the injector at a desired location along the mast, the winch is immediately available for performing other desired tasks, such as a joined pipe operation.
- However, the above system can not readily accommodate a top drive mechanism to rotate joined pipe or to set surface casing. It is therefore an object of the present invention to provide a mobile rig with such capability. In particular, the mast of the present invention should allow for a winch arrangement to perform various tasks in combination with a trolley which is movable along the mast, and to perform other tasks when detached from the trolley in a solo configuration. The trolley should be adapted to accept various other equipment, including an injector and lubricator for continuous or coiled tubing. The trolley and mast should allow an injector to be parked near the bottom of the mast out of the plane of the mast to allow the trolley to travel along the entire length of the mast. Further, the winch should be capable of working the entire length of the mast without undue interference from the trolley. Any load carried by the trolley should be transferred directly to the winch arrangement so that the trolley acts primarily as a guide for the load along the mast, thus streamlining the trolley's structure and weight.
- According to the present invention, there is provided in one aspect an improved mast arrangement for mobile multi-function rig comprising a winch line extending from an upper end of the mast having, a traveling block supported by the winch line, and a trolley mountable on the mast having side members for operatively engaging the mast, rail portions extending perpendicularly from the side members, a cross-beam extending transversely between the rail portions and adapted to roll therealong, and a collar slidably mounted on the cross-beam for movement therealong and adapted for coupling to the traveling block, wherein a load mounted to the collar is transferred through the collar directly to the traveling block and the supporting winch line.
- The invention will now be described, by way of example only, with reference to the accompanying drawings, wherein:
- FIG. 1a is a side view of a mobile multi-function rig which employs a mast and trolley according to a preferred embodiment of the present invention showing the trolley at a selected location along the mast and an injector coupled to the trolley;
- FIG. 1b is an end view of the rig from the right side of FIG. 1a;
- FIG. 2a is a view similar to FIG. 1a but showing only the trailer portion of the rig omitting several features such as the cab and cartridge assembly, and showing the trolley located at the lower end of the mast and the injector fixed, or “parked”, out of the plane of the mast on the bed of the trailer with the traveling block still attached;
- FIG. 2b is an end view of the rig from the right side of FIG. 2a;
- FIG. 3a is a close-up side view of the back of the trailer and the lower end of the mast of FIG. 2a, with the traveling block and a user platform and railing omitted for a better view of the injector and trolley;
- FIG. 3b is an end view from the right side of FIG. 3a with the traveling block;
- FIG. 4a is a view similar to FIG. 1a but showing the injector parked on the back of the rig's trailer and the trolley at a selected location along the mast with a top drive operatively engaged to the trolley;
- FIG. 4b is an end view from the right side of FIG. 4a with the injector omitted;
- FIG. 5a is a close-up side view of the mast, trolley and top drive of FIG. 4a;
- FIG. 5b is an end view from the right side of FIG. 5a;
- FIG. 6a shows the mast and trolley of FIG. 5a with the top drive omitted;
- FIG. 6b an end view of the rig from the right side of FIG. 6a;
- FIG. 7a is a view similar to FIG. 4a but showing only a portion of the rig's, the trolley at a lower end of the mast with the top drive moved out of the plane of the mast toward the parked injector, and the traveling block disengaged from the trolley; and,
- FIG. 7b is an end view from the right side of FIG. 7a.
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- FIG. 1a shows a mobile rig (generally indicated by reference numeral 10) for transporting drilling and servicing equipment to an oil or gas well site. The equipment, such as a
cartridge assembly 20 capable of holding various sizes of continuous or coiled tubing (“CT”) 22, is located aboard atrailer portion 12 of the rig which is adapted to be towed by a self-propelledtractor portion 14. A triple axlerear end 16 of thetrailer 12 includes a number of hydraulically operatedstabilizers 18 for enhancing the trailer's lateral stability once its rear end is located over awellhead 26 and during well operations. The term “well” is understood herein to mean either an oil or gas well to be drilled, or an existing well or wellhead which is to be tested or serviced. The rig's design is generally symmetrical about its longitudinal axis. - The
rig 10 incorporates a number of drilling and servicing features aboard thetrailer 12, including a mast 30 (also referred to as a “derrick”) pivotally mounted to therear end 16 of the trailer, which can also carry a blow-out-preventor (“BOP”). The mast is capable of supporting aninjector 50 for moving theCT 22 into and out of the well. Themast 30 has two longitudinally spaced column members 32 (as best seen in FIG. 1b), each formed by a hollow structural section having a longitudinal central passage along its length. Thecolumns 32 are joined at their top ends by a generally hollow structural tie member, orcrown 36, housing a number of conventional pulley wheels 34 (also referred to as “sheaves”) about which pass thecables 38 of awinch assembly 40. In the embodiment shown the mast is about 72 feet (about 22 m) in length from ground to crown so as to accommodate multiple sections of conventional joined pipe. A telescoping hydraulic cylinder orleg 42 is attached to eachcolumn 32, and is operated from a control panel at the rear of the trailer, to tilt themast 30 between a generally horizontal transportation mode and a generally vertical operating mode. A operator'splatform 44 with safety railing is provided at thebottom end 46 of the mast. - The
winch assembly 40, in conjunction with the novel features of the trolley 60, is designed to perform multiple tasks, such as: - raising and lowering the
injector 50 and lubricator, as well as running joined pipe segments; - handling various lengths of down hole tools;
- hoisting other equipment as may be needed, including wireline equipment; and,
- importantly, allowing a top drive80 (as shown in FIGS. 4a-5 b) to be supported and operated in the mast.
- The
winch assembly 40 incorporates at least two sets ofsteel cables 38, where at least some of which extend about a first pulley 39 a and then up a respective column through its hollow interior over a second pulley 39 b and to the crown pulleys 34. Thecables 38 then extend downwardly away from the crown to engage and support a “traveling”block 48 in a known manner. Theblock 48 has a nut andbolt arrangement 49 at the far, or lower, end of the block to provide a means of manually coupling and decoupling the block and the trolley 60. The winch assembly therefore controls the movement of the traveling block and trolley along the elevated mast for performing desired functions. - Referring now more particularly to the trolley60 as shown in detail in FIGS. 6a and 6 b, the trolley is adapted to ride on the
columns 32 to any number of desired locations longitudinally along the mast, with two selected vertical locations being illustrated in FIGS. 1b & 2 b. The trolley has a pair of opposedelongate side members 62 extending generally parallel to thecolumns 32. Upper and lower c-shaped guides 64 a and 64 b, respectively, at the ends of eachside member 62 engage thecolumns 32 to space the side members inwardly from the masts and to guide the trolley therealong. Each guide 64 a, 64 b is pinned to its side member bypins 65 to allow for some differential twist between the guides themselves and the side members. Eachside member 62 has a truss-likelateral rail portion 66 which extends generally perpendicularly out of the plane of the mast, namely horizontally when the mast is elevated vertically. Anelongate cross-beam 68 spans perpendicularly between the trolley'sside members 62, and has two pairs ofrollers 70 at each end for guiding thecross-beam 68 laterally out of the mast along therail portions 66 to a desired location therealong. The cross-beam 68 carries acollar 72 which has an intermediate sleeve portion 74 adapted to slide side-to-side along the cross-beam with the use of TEFLON pads or the like. Thehead 76 of the collar has apertures for coupling to the travelingblock 48 via the nut andbolt arrangement 49, and thetail 78 of the collar is adapted for coupling to equipment, such as to the injector 50 (FIG. 1b) or the top drive 80 (FIG. 5b). - The trolley is relatively lightweight since the design provides for a direct transfer of load of any machinery coupled to the
tail 78 to the travelingblock 48 andcables 38 via thecollar 72. The load remains generally linearly aligned with theload bearing cables 38 as the machinery is slid side-to-side along thecross-beam 68, and as the machinery and cross-beam are rolled front-to-back along therails 66. The travelingblock 48 and cables merely follow the collar as the cross-beam is rolled toward the back of therails 66 and out of the plane of the mast. Hence, the trolley acts primarily as a guide for the machinery along the mast and carries little, if any, of the machine's weight. - FIGS. 1a to 3 b illustrate use of the
injector 50 by the rig of the present invention. A top end of the injector is pinned to thetail 78 of the trolley'scollar 72, and the travelingblock 48 is coupled to the collar'shead 76 so that the injector's weight is carried directly by thecables 38 up to the crown. Since thewinch assembly 40 controls movement of the cables, it is therefore used to move the trolley and injector along the mast, as for example to an operating position shown in FIGS. 1a and 1 b. Opposed sides of the injector are further engaged with the lower end of the trolley'sside members 62 by a pair of hydraulically operatedcylinders 52 to manipulate the orientation of the injector in a plurality of aspects, such as rotating and tilting the bottom of the injector relative to thewellhead 26. Hence, the trolley'sside members 62 and the guides 64 a, 64 b serve to transfer twisting and bending moments from the injector to the mast's columns. When the injector is not needed for operation, the injector is rolled to the back end of therails 66 out of the plane of the mast by thecylinders 52, and the trolley is then brought to thebottom end 46 of the mast to rest the injector on the trailer's deck, as shown in FIGS. 2a to 3 b. Prior to disconnecting the injector the trolley should be securely fixed by actuating a hydraulically operated lockingpin 54 from the mast's column to anopposed aperture 56 in the trolley'sside member 62. The injector is then removed from the trolley by decoupling the injector's top end from the collar'stail 78 and thecylinders 52 from theside members 62. Upon decoupling the locking pin, the unloaded trolley (as seen in FIGS. 6a and 6 b) is then free to operate without obstruction along the entire length of the mast. - Alternately, if the trolley is not needed for a desired rig operation, then the trolley may also be parked at the bottom end of the mast and fixed thereto by the locking pin. The
cross-beam 68 is rolled to the back end of therails 66 out of the plane of the mast, and the travelingblock 48 is then decoulped from the trolley at thecollar 72. The winch and traveling block arrangement is then used along the entire length of the mast to perform certain rig operations independently of the trolley, such as handling joined pipe. - A particular advantage of the present invention is the capability to readily switch from an injector operation to a top drive operation. With the
injector 50 at rest on thetrailer 12 and the trolley at the mast's bottom end, thetop drive 80 may be secured to the trolley by coupling the drive's top end to the collar'stail 78, and pinning twolateral support arms 82 to the trolley'sside members 62, as shown in FIGS. 5a and 5 b. Thesupport arms 82 provide important torsional resistance to the top drive during operation, without which the top drive could not function. Once attached, the top drive and trolley arrangement may then be maneuvered along the mast by the winch assembly and elevated to an operating position (as in FIGS. 4a and 4 b) for performing desired operations, such as setting surface casing. The reverse procedure is followed to remove the top drive from the trolley. The top drive also incorporates a pinion gear arrangement, or alternatelyhydraulic jacks 84, to pivot the top drive about thetail 78 from the vertical position illustrated to a generally horizontal orientation facing away from the trailer's rear end to facilitate the loading and unloading of casing to and from the mast. - Another advantage of the present invention is the capability to readily switch between top drive and joined pipe operations without removing the top drive off the mast or rig. This feature is best illustrated by first referring again to FIGS. 4a & 4 b showing the traveling
block 48 connected to the trolley 60 with thetop drive 70 mounted therein for setting surface casing. From this configuration the rig may be switched to a joined pipe operation by lowering the trolley toward the mast's bottom end and rolling the trolley'scross-beam 68 toward the back end of therails 66 to take the top drive out of the plane of the mast 30 (i.e. “off-centre”) and bring it to a position beside and above the parkedinjector 50, as shown in FIGS. 7a & 7 b. The trolley may be fixed in position to the mast as described earlier using thelocking pin 54 or the like. The travelingblock 48 is then disengaged from the trolley and may operate unobstructed along the length of the mast for handling joined pipe and other rig operations. This aspect of the invention allows the top drive to be quickly re-engaged along the mast if an obstruction or other problem is encountered during the joined pipe operation which requires use of the top drive. - In sum, the many advantages of the rig of the present invention include:
- the ability to readily switch between various rig operations which heretofore have not been possible on mobile rigs, such operations including manipulating CT with the
injector 50, setting surface casing using thetop drive 80, operating the winch and traveling block for joined pipe operations, and interchanging between top drive and joined pipe operations without removing the top drive from the mast or rig; - the ability to run deeper joined pipe applications than are available on current mobile rigs by providing means for employing the
top drive 80, namely the trolley is adapted to counteract the torsion exerted by the top drive during operation (for instance, the top drive could not function by mere pinning to the traveling block); - the ability for the trolley to work the entire length of the mast after quickly parking the injector near the bottom of the mast;
- providing the winch and traveling block with unobstructed travel along the entire length of the mast without disengaging the trolley from the mast and with the injector parked near the bottom end;
- providing a trolley of relatively simple and lightweight design by having the trolley work primarily as a guide for a given load since its configuration allows for a direct transfer of load to the traveling block and winch cables; and,
- providing a mast design which is not top heavy by parking equipment at the bottom end and having the aforementioned lightweight trolley design.
- The above description is intended in an illustrative rather than a restrictive sense, and variations to the specific configurations described may be apparent to skilled persons in adapting the present invention to other specific applications. Such variations are intended to form part of the present invention insofar as they are within the spirit and scope of the claims below.
Claims (1)
1. An improved mast and trolley for use in a rig comprising:
a mast mounted to the rig;
a winch line extending from an upper end of the mast;
a traveling block located at a terminal end of the winch line;
a trolley mountable to said block for travel along said mast, and adapted to carry drilling and servicing equipment for oil and gas wells.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002364147A CA2364147A1 (en) | 2001-11-28 | 2001-11-28 | Improved mast and trolley arrangement for mobile multi-function rig |
CA2,364,147 | 2001-11-28 |
Publications (1)
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US20030098150A1 true US20030098150A1 (en) | 2003-05-29 |
Family
ID=4170715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/232,393 Abandoned US20030098150A1 (en) | 2001-11-28 | 2002-09-03 | Mast and trolley arrangement for mobile multi-function rig |
Country Status (2)
Country | Link |
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US (1) | US20030098150A1 (en) |
CA (1) | CA2364147A1 (en) |
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Owner name: TECHNICOIL CORPORATION, CANADA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ANDREYCHUK, MARK T.;REEL/FRAME:013256/0079 Effective date: 20020827 |
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