EP1924756A1 - Drilling rig and method for introducing one or more drilling pipes into an underbalanced well using same - Google Patents
Drilling rig and method for introducing one or more drilling pipes into an underbalanced well using sameInfo
- Publication number
- EP1924756A1 EP1924756A1 EP06783925A EP06783925A EP1924756A1 EP 1924756 A1 EP1924756 A1 EP 1924756A1 EP 06783925 A EP06783925 A EP 06783925A EP 06783925 A EP06783925 A EP 06783925A EP 1924756 A1 EP1924756 A1 EP 1924756A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- well
- drilling rig
- carrier
- drill
- mast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000000969 carrier Substances 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 238000012546 transfer Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 description 27
- 239000007788 liquid Substances 0.000 description 13
- 239000012530 fluid Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009844 basic oxygen steelmaking Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- IHPYMWDTONKSCO-UHFFFAOYSA-N 2,2'-piperazine-1,4-diylbisethanesulfonic acid Chemical compound OS(=O)(=O)CCN1CCN(CCS(O)(=O)=O)CC1 IHPYMWDTONKSCO-UHFFFAOYSA-N 0.000 description 1
- 239000007990 PIPES buffer Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
- E21B21/085—Underbalanced techniques, i.e. where borehole fluid pressure is below formation pressure
Definitions
- the invention relates to a drilling rig, comprising a mast to be placed above or close to a well and means connected to the mast for carrying drill pipes to be lowered into the well.
- a drilling rig is generally known and is used to form wells at locations where oil or gas is present in the ground.
- the most characteristic component of the known drilling rig is the mast or derrick construction, generally a slender framework pyramid which is placed above the drilling location or erected thereon and which rests on a foundation adjacently of or around the drilling location.
- a hoisting gear Arranged at the top of this mast is a hoisting gear with which drill pipes can be successively picked up from the ground at the front side of the mast and subseguently lowered in controlled manner into the well.
- the hoisting gear is situated some distance directly above the well.
- the known drilling rig is further provided with a rig floor which forms an integral carrying component thereof and is rigidly connected to the mast. An opening is formed in this rig floor for passage of the drill pipes. Means are further present on this rig floor with which the drill pipes can be rotatingly driven, usually in the form of a rotary table having therein a displacing rod of non-round cross- section, the so-called kelly. Finally, the drilling rig is further provided with means for pumping a drill fluid downward through the drill pipes into the ground, whereafter this drill fluid comes up again through the hollow space between the drill pipes and the wall of the well.
- the drilling rig is thus in fact a crane with multiple functions, i.e. the raising or lowering of the drill pipes, the rotation of the drill pipes during the drilling process, and storage of the drill pipes during changing of the drill head.
- top drive In modern drilling rigs use is in fact usually made, instead of a rotary table in the rig floor, of a so-called “top drive” at the top of the mast to rotate the drill pipes.
- a top drive consists of one or more motors connected via a transmission to a rotatable connecting piece to which one drill pipe at a time is attached.
- the top drive is suspended from the hoisting gear in the mast and can be moved up and downward thereby.
- the basic functions of the drilling rig are therefore to move the drill pipes up and downward in controlled manner, to impart a rotating movement to the drill pipes if necessary, and to pump drill fluid.
- the controlled movement of the drill pipe comprises of compensating for the downward force exerted by the force of gravity on the drill pipes, so their weight.
- the process of constructing a drill string is an interrupted process of placing and screwing on new pipes and subsequently lowering the whole drill string.
- the drill string can herein move no further downward each time than the length of the newly placed drill pipe.
- the drill string is stationary and is supported by a non-movable mechanical support in the form of the rig floor.
- the actual hoisting gear is used during this operation for placing of the new drill pipe to be screwed on.
- the drill string is supported by the rig floor during the stationary part of the movement process and by the hoisting gear of the drilling rig during the dynamic part.
- the above described process can also take place in reverse sequence, wherein the drill string is pulled up in steps by the hoisting gear.
- control of the pressures occurring in the well are an important factor in the overall drilling process.
- Controlling of the pressures occurring in the well is based on the principle that the force exerted on the well by the column of liquid, the drill fluid, is equal to or slightly greater than the ground pressure present in the well. This is referred to as “balanced”, or even as “overbalanced”, drilling.
- blowout preventers which can close the well if said balance were to be temporarily disrupted. If the ground pressure becomes greater than the back-pressure exerted by the liquid column, the liquid column will then be pressed upward out of the well. This is prevented by closing blowout preventers, whereafter the balance can once again be restored by increasing the weight of the liquid column, and the drilling process can hereby be resumed.
- the drill fluid is provided with solids. These solids serve to reduce the permeability of the reservoir rock by cementing, in order to give sufficient support to enable support for the liquid column essential to the drilling process.
- This cementing which is essential during the drilling process, has the effect of slowing production considerably during the production phase of the well. As the prevailing ground pressure decreases due to the extraction of oil or gas from the well during the production phase, an increasing amount of cementing will be necessary as time passes to enable a liquid column to be supported. The ultimate result hereof is a steadily increasing production loss .
- blowout preventers are going to be used in this situation not only in the case of very short-lived disturbances in balance but will serve instead as important component in the performing of a continuous process, additional blowout preventers, diverse of which are specially equipped for this new task, must be placed on the well. This applies all the more because the new process will also cause wear of the valves since the drill pipes are moved through them.
- the well pressure caused by the process change has another consequence.
- a force which is uniform in all directions will be exerted by the prevailing well pressure, and thus also on the closed underside of the now closed drill string. Since only atmospheric pressure is exerted on the portion of the drill string protruding from the well, the difference in pressure inside and outside the well will result in an upward directed force on the drill string. As soon as this upward directed force becomes greater than the weight of the drill string, which does after all depend on the length of the drill string and so the number of drill pipes, the upward directed force will press the drill string out of the closed well. As the length of the drill string decreases, the upward directed differential force will become increasingly greater.
- the invention therefore has for its object to provide a drilling rig with which, in addition to normal drilling, special operations in an underbalanced well can also be performed without use having to be made for this purpose of separate constructions and services of third parties.
- the carrying means comprise at least three carriers which are connected at different heights to the mast and displaceable in height direction therealong and which are adapted to exert a pulling force or pressing force as required on the drill pipes.
- the upper carrier When at least the upper carrier has means for rotatingly driving the drill pipes, it can be used in all operations, both drilling and workovers, in an overbalanced situation.
- the rotating drive means of the upper carrier are formed by a so-called top drive.
- the carriers in the drilling rig according to the invention are advantageously adapted to co-act during a "normal" drilling operation when the well is (over) balanced, wherein the upper carrier is adapted to lower drill pipes in a downward movement into the well, and the middle or lower carrier is adapted to take over and hold the drill pipes fixedly at the end of the downward movement.
- the drilling rig can thus be used conventionally in an overbalanced situation.
- the lower carrier is preferably connected releasably to the mast. This lower carrier can thus be removed and stored when it is not required, thus during normal use of the drilling rig, whereby the two other carriers can move unimpeded along the mast.
- the middle and lower carrier can then be adapted to co-act during an operation when underbalancing prevails in the well, wherein the middle carrier is adapted to urged components in a downward stroke into the well, and the lower carrier remains in place and is adapted to hold the components fast and to transfer forces that occur into the mast .
- the drilling rig is advantageously further provided with at least one platform connected to the mast and displaceable therealong in height direction. Tools and instruments used during drilling can be kept on this platform, which itself does not fulfil a supporting function in the drilling process, and personnel who must be present in the drilling rig can take up position thereon. Because the platform is height-adjustable, the process of assembling the drill string or removing drill pipes therefrom can take place at any desired height.
- the platform can be connected to one of the carriers.
- the number of separate components of the drilling rig can thus be limited.
- the drilling rig according to the invention is further provided with a device for supplying drill pipes which co-acts with the carrying means.
- the process of introducing or removing the drill pipes can hereby be for the greater part mechanized, so that a human contribution is not necessary here, or hardly so. This is important because handling of drill pipes on the rig floor is one of the most hazardous operations on and around a drilling rig.
- This supply device preferably has means for raising the drill pipes from a lying position and transferring them to the carrying means. The pipes can thus be stored simply lying next to the drilling rig.
- the invention further relates to a method for introducing one or more drill pipes into an underbalanced well.
- the invention now has for its object to propose such a method wherein the use of separate installations or the employment of third parties can be dispensed with. According to the invention this is achieved by making use of a drilling rig as described above for introducing one or more drill pipes into an underbalanced well, wherein the method comprises of suspending the drill pi ⁇ e(s) from the carrying means and urging the pipe(s) downward into the well while exerting a pressing force.
- the lower carrier is preferably connected in flexible manner to a blowout preventer placed on the well and fixed to the mast prior to urging of the drill pipe(s) into the well. Due to the rigid attachment of the carrier to the mast and its flexible connection to the blowout preventer (s) , the well is safeguarded from any downward directed load resulting from the processes carried out by the drilling rig.
- the method is advantageously adapted here such that the middle carrier urges the drill pipe(s) in a downward stroke into the well and the lower carrier remains in place, holds the drill pipe(s) fast and transfers forces which occur into the mast.
- the middle and lower carrier can be provided for this purpose with holding elements or "slips", of which one engages on the drill pipe and one allows passage of the drill pipe in alternating manner, whereby these slips as it were pass the drill pipes to each other. Because the operations necessary to introduce the drill pipes are performed by the middle and lower carriers, the upper carrier can carry out other operations, such as supplying and fastening to each other or, conversely, taking apart drill pipes, while the space above the middle carrier remains available for temporary storage of the drill pipes.
- a system of telescopic sluice tubes of which a stationary outer sluice tube is fixed to the lower carrier and an inner sluice tube is fixed to the middle carrier and moved thereby.
- a system of sluice tubes also referred to as telescopic deployment tubes (TDT)
- TDT telescopic deployment tubes
- the drill pipe(s) are advantageously picked up and presented to the middle carrier by the upper carrier. Because the operations necessary for introducing the drill pipes are performed by the middle and lower carriers, the upper carrier and the space above the middle carrier do after all remain available for other operations, such as manipulation of drill pipes using the top drive, fastening together or, conversely, taking apart drill pipes and the like. Operation can hereby take place efficiently and safely.
- the drill pipe(s) can herein also be driven rotatingly by the upper carrier.
- Fig. 1 is a schematic side view of a drilling rig according to the invention during normal operation, wherein an overbalanced pressure ratio prevails in the well,
- Fig. 2 is a view corresponding with fig. 1 of the drilling rig during underbalanced operation, thus when an underbalanced pressure ratio prevails in the well
- Fig. 3 is a view corresponding with fig. 1 and 2 of the drilling rig used with a system of telescopic sluice tubes .
- a drilling rig 1 which is erected at a drilling location DL comprises a mast 2 which is placed eccentrically in the shown embodiment, so adjacently instead of directly above a well 3 (of which only the upper part is shown here) .
- This mast 2 is placed on a support or substructure 4 around well 3.
- Carriers 5, 6, 7, which are suspended directly above well 3 are movable independently of each other in height direction along mast 2.
- a platform 8 which is likewise displaceable in height direction.
- a cabin 9 is situated on this platform 8 on which operatives P can take position.
- the upper carrier 5 is provided with means 17 (shown schematically here) for rotatingly driving drill pipes to be fastened thereto (not shown here) , in the form of a so-called top drive.
- the middle carrier 6 is also provided with means (not shown here) for rotatingly driving the drill pipes, in this case in the form of a rotary table.
- a supply device 10 with which drill pipes 29, which are stored lying on racks in the vicinity of drilling rig 1, can be carried to drilling rig 1 and raised.
- This supply device 10 is provided here with an arm 11 which has an engaging member 30 movable therealong which picks up drill pipes 29. By raising the arm 11 and simultaneously rotating engaging member 30 the drill pipe 29 is carried from the lying position to a vertical position at a determined position above platform 8, where drill pipe 29 is then placed. Arm 11 with engaging member 30 then returns to its starting position.
- Well 3 is provided on the top side with a system 12 of blowout preventers, a so-called BOP stack.
- a system 12 of blowout preventers a so-called BOP stack.
- the valve system 12 is opened.
- this valve system 12 is formed by two ram BOPs 13, 14 and an annular BOP 15, while a further conduit 16 for drill fluid is connected to the underside of valve system 12.
- Drilling rig 1 is used as follows in this configuration.
- Supply device 10 feeds one drill pipe at a time which is parked at a position assigned therefor on platform 8.
- the drill pipe is taken over by upper carrier 5 which for this purpose is first displaced along mast 2 to its lowest position 5 f .
- the first carrier 5 is then moved upward, while the drill pipe is moved from its parked position to a position directly above well 3.
- the drill head (not shown here) is for instance first coupled to the bottom side of the first drill pipe, whereafter each subsequently supplied drill pipe is screwed onto the preceding one.
- the upper carrier 5 is moved downward in controlled manner along mast 2.
- the drill pipe herein descends into well 3 through an opening in middle carrier 6 and through the normally opened valve system 12.
- the speed at which upper carrier 5 lowers the drill pipe into well 3 depends on the conditions in well 3.
- the drill pipe - and with it the whole drill string suspended thereunder - can be set into rotation by top drive 17. Due to the combination of the weight of the drill string and the rotational movement thereof the drill head cuts into the bottom of well 3, which is thereby deepened still further.
- top drive 17 can be stopped and the drill pipe is engaged by middle carrier 6, or optionally lower carrier 7, which are provided for this purpose with engaging means (not shown here) .
- Top drive 17 is then disconnected from the drill pipe which is then situated roughly at the position of platform 8.
- Upper carrier 5 then takes over a subsequent drill pipe from supply device 10 and moves upward in order to resume drilling.
- the pressure ratio in well 3 therefore becomes underbalanced.
- the drilling process can be interrupted and, by making determined modifications, the drilling rig and the assembly 12 of blowout preventers can be made suitable for this new operating situation.
- the carrying means of drilling rig 1 according to the invention are adapted not only to exert pulling or lifting forces, but also provide the option of exerting pressing forces on the drill pipes.
- the configuration of drilling rig 1 is then first modified by suspending the lower carrier 7 from mast 2 (fig. 2) .
- This carrier 7 is mounted at a suitable height on mast 2 at the position of the top of valve system 12.
- This valve system 12 is usually first expanded, compared to the normal operating state of drilling rig 1, by adding one or more additional valves 18, 19, 20 which play a part in the controlled passage of drill pipes. Compared to the previous situation, valve system 12 is here further expanded with a bypass conduit 23 for drill fluid around the annular valve 15.
- the lower carrier 7 Due to the higher position of valve system 12 the lower carrier 7 thus comes to lie higher above the ground G than the middle carrier 6 during normal use of drilling rig 1 when the valve system 12 comprises fewer valves.
- the fact that the height of lower carrier 7 can be adjusted is an advantage compared to conventional drilling rigs, where the rig floor is placed at a fixed height above the ground and the space below it is not usually sufficient for placing of the required additional blowout preventers and hydraulic workover unit. In conventional drilling rigs a part of this equipment must therefore be placed above the rig floor, which in turn has consequences for the normal operating process of the drilling rig. (Under these conditions the actual drilling rig can usually no longer be used at all, and all further operations are carried out using the hydraulic workover unit. )
- lower carrier 7 is first connected to valve system 12.
- This carrier 7 is provided for this purpose with flexible, pressure-tight connecting means (not shown here) . Due to the flexibility of these connecting means the well is disconnected mechanically from the drilling rig. Loads occurring in drilling rig 1 during operations under pressure are thus not transmitted into well 3, but are absorbed instead in the construction of carriers 6, 7 and mast 2. These loads are eventually transmitted directly from mast 2 to support 4 and the ground G.
- Upper carrier 5 plays no part in this operation and remains free for use in other operations, such as supplying or removing drill pipes in co-action with supply device 10, rotating the drill pipes and the like.
- Drilling rig 1 can hereby also be used in the normal manner in this situation, so that no different procedures, with the associated safety hazards, need be introduced. It is therefore also possible to continue working efficiently and, above all, safely in this operating situation.
- lower carrier 7 is fixed to mast 2 once it has been brought to the desired height, kiddle carrier 6 then performs all movements necessary for the process.
- the middle and lower carriers 6, 7 are first provided with holding elements or slips 21, 22 which engage on the outer side of the drill pipes, and the diameter of which can be adjusted to that of the relevant drill pipe.
- a similar method as specified above is applied when drilling rig 1 is used to introduce drill pipes of differing cross-sectional form or other components into the underbalanced well 3 using a system 24 of telescopic sluice tubes or TDT (fig. 3) .
- TDT telescopic sluice tubes
- the bottom side of an outer stationary tube 25 is fastened to lower carrier 7 while the inner tube 26 is fastened with its top side to middle carrier 6.
- the middle carrier 6 moves up and downward synchronously with opening and closing of valves 27, 28 of the TDT in order to sluice drill pipes and other components through the TDT into well 3.
- upper carrier 5 is left free to carry out other operations.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Drilling And Boring (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06783925T PL1924756T3 (en) | 2005-09-15 | 2006-09-15 | Drilling rig and method for introducing one or more drilling pipes into an underbalanced well using same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1029961A NL1029961C2 (en) | 2005-09-15 | 2005-09-15 | Derrick and method for bringing one or more drill pipes into a wellbore with enclosed pressure. |
PCT/NL2006/000460 WO2007032673A1 (en) | 2005-09-15 | 2006-09-15 | Drilling rig and method for introducing one or more drilling pipes into an underbalanced well using same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1924756A1 true EP1924756A1 (en) | 2008-05-28 |
EP1924756B1 EP1924756B1 (en) | 2009-05-06 |
Family
ID=36168445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06783925A Not-in-force EP1924756B1 (en) | 2005-09-15 | 2006-09-15 | Drilling rig and method for introducing one or more drilling pipes into an underbalanced well using same |
Country Status (9)
Country | Link |
---|---|
US (1) | US20090211813A1 (en) |
EP (1) | EP1924756B1 (en) |
AT (1) | ATE430871T1 (en) |
CA (1) | CA2619932A1 (en) |
DE (1) | DE602006006698D1 (en) |
NL (1) | NL1029961C2 (en) |
NO (1) | NO333188B1 (en) |
PL (1) | PL1924756T3 (en) |
WO (1) | WO2007032673A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107218000B (en) * | 2017-07-27 | 2019-02-15 | 中石化石油工程机械有限公司第四机械厂 | Multi-cylinder lifting and rotation integrated form ocean hydraulic workover unit |
CN114293939B (en) * | 2021-12-29 | 2023-09-12 | 河北永明地质工程机械有限公司 | Core drilling machine |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB875127A (en) * | 1956-09-24 | 1961-08-16 | F N R D Ltd | Improvements in or relating to earth drilling rigs |
GB894493A (en) * | 1957-08-09 | 1962-04-26 | F N R D Ltd | Improvements in or relating to earth drilling rigs |
US3404741A (en) * | 1962-12-28 | 1968-10-08 | Ministerul Ind Petrolui Si Chi | Automated system and drilling rig for continuously and automatically pulling and running a drill-pipe string |
US3976207A (en) * | 1975-04-07 | 1976-08-24 | Bj-Hughes Inc., Formerly Byron Jackson, Inc. | Casing stabbing apparatus |
US4449596A (en) * | 1982-08-03 | 1984-05-22 | Varco International, Inc. | Drilling of wells with top drive unit |
US5295536A (en) * | 1992-11-23 | 1994-03-22 | Bode Robert E | Drilling mud container apparatus |
US6199641B1 (en) * | 1997-10-21 | 2001-03-13 | Tesco Corporation | Pipe gripping device |
US6003598A (en) * | 1998-01-02 | 1999-12-21 | Cancoil Technology Corporation | Mobile multi-function rig |
NO312309B1 (en) * | 1999-08-19 | 2002-04-22 | Gunnar Kristiansen | Device for lifting and lowering equipment for movement of drill string in a drill tower |
US6412576B1 (en) * | 1999-10-16 | 2002-07-02 | William J. Meiners | Methods and apparatus for subterranean drilling utilizing a top drive |
US6854520B1 (en) * | 1999-11-05 | 2005-02-15 | Weatherford/Lamb, Inc. | Apparatus and method for handling a tubular |
US6386284B1 (en) * | 2000-02-11 | 2002-05-14 | David A. Buck | Snubbing unit drilling system |
US6367554B1 (en) * | 2000-05-26 | 2002-04-09 | Cooper Cameron Corporation | Riser method and apparatus |
CA2322917C (en) * | 2000-10-06 | 2007-01-09 | Cancoil Integrated Services Inc. | Trolley and traveling block system |
US6431286B1 (en) * | 2000-10-11 | 2002-08-13 | Cancoil Integrated Services Inc. | Pivoting injector arrangement |
ATE329127T1 (en) * | 2001-12-05 | 2006-06-15 | Comacchio S R L | DRILLING MAST WITH MOVABLE AND FIXED SCREWING VICE |
US6688393B2 (en) * | 2002-02-25 | 2004-02-10 | Halliburton Energy Services, Inc. | Dual jacking system and method |
US6973979B2 (en) * | 2003-04-15 | 2005-12-13 | Savanna Energy Services Corp. | Drilling rig apparatus and downhole tool assembly system and method |
EP1709287B1 (en) * | 2003-12-12 | 2016-09-28 | Varco I/P, Inc. | Method and apparatus for offline standbuilding |
US7503394B2 (en) * | 2005-06-08 | 2009-03-17 | Frank's Casing & Rental Tools, Inc. | System for running oilfield tubulars into wellbores and method for using same |
US7469749B2 (en) * | 2006-02-22 | 2008-12-30 | Live Well Service, A Division Of Precision Drilling Corporation | Mobile snubbing system |
EP1953334B1 (en) * | 2007-01-08 | 2016-11-09 | National Oilwell Varco, L.P. | A pipe handling system and method |
US7584810B1 (en) * | 2007-10-08 | 2009-09-08 | Eagle Rock Manufacturing, Llc | Top drive power swivel assembly |
-
2005
- 2005-09-15 NL NL1029961A patent/NL1029961C2/en not_active IP Right Cessation
-
2006
- 2006-09-15 AT AT06783925T patent/ATE430871T1/en not_active IP Right Cessation
- 2006-09-15 WO PCT/NL2006/000460 patent/WO2007032673A1/en active Application Filing
- 2006-09-15 CA CA002619932A patent/CA2619932A1/en not_active Abandoned
- 2006-09-15 US US12/067,146 patent/US20090211813A1/en not_active Abandoned
- 2006-09-15 DE DE602006006698T patent/DE602006006698D1/en active Active
- 2006-09-15 PL PL06783925T patent/PL1924756T3/en unknown
- 2006-09-15 EP EP06783925A patent/EP1924756B1/en not_active Not-in-force
-
2008
- 2008-04-10 NO NO20081746A patent/NO333188B1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2007032673A1 * |
Also Published As
Publication number | Publication date |
---|---|
PL1924756T3 (en) | 2009-11-30 |
CA2619932A1 (en) | 2007-03-22 |
DE602006006698D1 (en) | 2009-06-18 |
WO2007032673A1 (en) | 2007-03-22 |
US20090211813A1 (en) | 2009-08-27 |
NO333188B1 (en) | 2013-03-25 |
NL1029961C2 (en) | 2007-03-16 |
ATE430871T1 (en) | 2009-05-15 |
EP1924756B1 (en) | 2009-05-06 |
NO20081746L (en) | 2008-06-11 |
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