NO347304B1 - A system and method for a petroleum casing or tubing recovery - Google Patents
A system and method for a petroleum casing or tubing recovery Download PDFInfo
- Publication number
- NO347304B1 NO347304B1 NO20200492A NO20200492A NO347304B1 NO 347304 B1 NO347304 B1 NO 347304B1 NO 20200492 A NO20200492 A NO 20200492A NO 20200492 A NO20200492 A NO 20200492A NO 347304 B1 NO347304 B1 NO 347304B1
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- casing
- tubing
- rollers
- belt
- well
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- 238000011084 recovery Methods 0.000 title claims description 33
- 239000003208 petroleum Substances 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 17
- 230000007246 mechanism Effects 0.000 claims description 57
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000002699 waste material Substances 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 description 12
- 238000003860 storage Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Cleaning In General (AREA)
- Metal Extraction Processes (AREA)
- Treatment Of Fiber Materials (AREA)
Description
Title: A system and method for a petroleum casing or tubing recovery
Introduction
The present invention is a petroleum well casing or tubing recovery system. More specifically, casing or tubing being pulled out of a well is flattened in a continuous process rather than being broken out into separate pipe stands. The resulting flattened casing belt may be wound up to a casing belt coil or cut into flat casing belt sections put in a basket or other container.
Problems of prior art
During an oil or gas well Permanent plug and abandonment or Slot Recovery, pipe (tubing or casing) has to be removed to facilitate for required barriers dictated by government regulations. Tubing are always recovered from wells.
Tubing may typically have dimensions 60 mm (23/8'') to 114 mm (41/2'') or up to 139 mm (51/2'') and are used in well completions in a casing pipe. Casing pipe extends from the surface to its intended depth. Casing pipe most often requiring to be pulled out is 244 mm (95/8'') or 339 mm (13 3/8''). Casing pipe sections or tubing sections are normally joined by threaded casing joints or tubing joints, respectively.
Traditionally this is done by the main rig, Derrick, breaking the casing into casing sections by removing one by one pipe section or stands of 2 or 3 pipe sections, by unscrewing or cutting the casing in to specific lengths. The lengths are determined by the handling capacity of the rig, usually into stands of 3 x 12 m casing pipe. This is a time consuming operation, due to several hundreds or thousand meter length of the pipe to be broken. Also the fact that each time a pipe stand length is recovered, the top drive will have to travel down to pick up the next pipe section. Rigs have to spend hundreds of hours doing such nonproductive work. Drilling a well is productive work.
The used casing or tubing pipe to be removed is being pulled by the hoisting mechanism of a derrick is in the background art and the hoisting is halted for each "stand" of 3 pipe sections and the stands are broken out into casing sections and stored in the pipe rack. Storing generally hollow, empty casing stands of Ø 244 mm (95/8’’) and length 3 x 12 m and wall thickness about 10 mm, occupies a large, generally empty volume in the stored casing stands, which have no operational value but shall only be exported for steel recovery. The background art process is costly, slow, and time-savvy.
US 4.154.310 A relates to apparatus for drilling wells for oil, gas, water, etc., wherein the device for drilling is placed in a rigid cylindrical collar which is expanded and pressed in the walls of the well. The collar absorbs a reactive torque from drilling. In the upper part of the walls of the collar control devices are installed which send up the signals about outside collar pressure, temperature, etc., and thus indicate any complications in the process of drilling. The collar is coaxially joined at its upper end to a thin-walled, continuous tube which is formed from a coiled sheet by drawing the sheet through a rolling-up system of rollers. The tube is axially extended and retracted by a mechanism which has two or more systems of tube moving elements which are symmetrically disposed relatively to a longitudinal axis of the tube and engage the external surface of the pipe column with forces which are sufficient to create the necessary friction forces for moving the tube. As the tube is extended, it draws a continuous sheet through the rolling-up system of rollers. The sheet at the time of the rolling-up embraces communication such as the pipes for feeding liquid to remove earth or rock, the electrical cable, the auxiliary flexible pipe for feeding liquid to a hydraulic cylinder, etc. During retraction, the tube is drawn through the unrolling system of rollers, unrolling it into a sheet which is wound in a coil by the winding mechanism.
WO 0026500 A1 relates to a describes a method for expanding an expandable steel tubular, where the method comprises the steps of: flattening the unexpanded tubular; transporting the flattened unexpanded tubular to a location at or near the site where the tubular is to be installed; unflattening the tubular before positioning the tubular at said site; and expanding the tubular along at least a substantial part of its length before or after the tubular has been positioned at said site.
NO 20200254A1 relates to a petroleum well casing or tubing pipe recovery system comprising a pipe pulling mechanism arranged for pulling casing or tubing pipe out of a well, a set of two or more flattener rollers arranged for flattening said casing or tubing pipe to a flattened pipe belt, a conveyor mechanism arranged for conveying said pipe belt away from said well, where the conveyor mechanism is arranged for conveying said pipe belt away from said well and to a coil drum, the coil drum arranged for winding up said flattened pipe belt to a pipe belt coil, said pipe belt coil for being transported away as steel recovery waste.
Brief Figure captions
The invention is illustrated in the attached drawing Figures, wherein
Fig.0 “Principle for pulling and flattening casing or tubing into flattened belt before (A) and after engagement of flattening rollers (B) and pulling”
Fig.0 is a rough illustration of a vertical section of a part of a well and a surface platform (marine or land). There is at least one casing (00) or tubing in the well, usually surrounded by a second, third, casing (01, 02, ...). There is arranged a pipe pulling mechanism (11) on the surface platform over the well, and arranged for pulling out a long length of the casing (00) or tubing from the well. A casing (00) or tubing, such as a 244 mm (95/8'') casing, which has been cut by a cutting tool and released from possible cement and arranged in an enveloping casing such as 339 mm (133/8''). The cylindrical casing (00) or tubing being pulled up out of the well in a more or less continuous manner is then according to the invention arranged for being run between a set of two or more flattener rollers (10), also called "squeeze" rollers (10), also in a continuous manner, e.g. in a length of 100m to 500m, to form a flattened casing or tubing belt (12) emerging in a generally continuous movement from the flattener rollers (10). In the left portion of the drawing, the casing (00)/tubing is held in a start position by the pipe pulling mechanism (11) and ready for engagement with the open flattener rollers (10). In the right portion of the drawing the flattener rollers (10) have been fully engaged with and flattening compressing the upcoming casing (00) or tubing (00) which is pulled up in a continuous manner by the pulling mechanism (11).
In an embodiment of the invention the set of two or more flattener rollers (10) are mounted pairwise on actuators (17) on an auxiliary rig frame (19) and arranged for initially engaging and exerting a squeezing, flattening force pair on the emerging casing (00) or tubing. In an embodiment the pipe pulling mechanism (11), preferably pulling rollers (11), are mounted in a peripheral arrangement on actuators (18) arranged on the same rig frame (19) and arranged for engaging and exerting an axially pulling force on the casing (00) or tubing to be flattened. Alternative to pulling rollers (11) one may use a jacking mechanism (11') for continuously jacking out the casing (00) or tubing. It may be advantageous as seen from a safety point of view, to separate the function of the pulling rollers of the pipe pulling mechanism (11) from the function of flattener rollers (10), in order to, among other, to preserve the axial pulling force capacity of the pipe junctions in their undeformed state when pulling, and then flattening the pipe junctions in a clean flattening operation.
Fig.1 “Pulling and flattening casing or tubing into a belt, with subsequent coiling”
Fig.1 is a vertical section corresponding to Fig.0. In an embodiment of the invention shown in Fig.1, the resulting flattened casing or tubing belt (12) is conveyed along a conveyor mechanism (30) to a coil drum (20) which winds up the flattened casing or tubing belt (12) to a casing or tubing belt coil (14). This casing or tubing belt coil (14) is then exported as waste steel for smelting and re-use.
Fig.2 “Bird view from point A, ref. Fig.1”
Fig.2, which is rendered together with Fig.1, is a steeply oblique view from point (A) of Fig.0 or Fig. 1, and shows in part a perspective view the pulling rollers (11) of an underlying pipe pulling mechanism (11) axially feeding the upcoming casing (00) or tubing up to the above flattener rollers (10) which squeeze and flatten the casing (00) or tubing to an upcoming flattened casing or tubing belt (12).
Fig.3 “Pulling and flattening casing or tubing into a belt, with subsequent cutting into belt sections for further transporting with a basket or container”
Fig.3 is a vertical section corresponding to Fig.0 or Fig.1, wherein an embodiment of the invention is provided with a cutter apparatus (50) arranged for cutting the emerging flattened casing or tubing belt (12) into belt sections (16). In a further embodiment of the invention the severed off belt sections (16) are carried by a robot arm (40) of a crane (42) for being put in a basket (44) or container for temporary storage near the rig and transport away from the well. This embodiment of the invention involving belt sectioning contributes to a very compact storage of the removed casing (00) or tubing.
Fig.4 “Wireline cutting casing or tubing”
Fig.4 is drawn in a style similar to Figs.0, 1, and 3. In this embodiment, a wireline (72) is run into the well with a wireline conveyed casing cutter tool (75) for severing the casing (00) or tubing to be pulled. This embodiment may be used in combination with the embodiments of Fig.0, Fig.1, Fig.2, or Fig.3. In this embodiment, the flattener rollers (10) are retracted before lowering the wireline conveyed casing cutter tool (75) into the well. The pipe pulling mechanism (11) may be engaged exerting an axial pull when cutting. When the cutting of the casing (00) or tubing is done and the casing (00) or tubing is free to be pulled, the pipe pulling mechanism (11) may start pulling, the flattener rollers (10) are engaged, e.g. as illustrated in Fig.0, and the pulling and flattening process commences. In this drawing the flattened casing or tubing belt (12) is cut by the cutter apparatus (50)/robot arm (40) to flat belt sections (16) and moved to the basket (44) or container, but could as well be wound up to a casing or tubing belt coil (14).
Brief summary of the invention
The invention is defined in the attached set of claims. Embodiments of the invention are defined in the dependent claims.
The invention relates to a petroleum well casing (00) or tubing recovery system comprising - a pipe pulling mechanism (11) arranged for pulling casing (00) or tubing out of a well, and
- a set of two or more flattener rollers (10) arranged for flattening said casing (00) or tubing to a flattened casing or tubing belt (12),,
-the pipe pulling mechanism (11) being suspended in an actuator mechanism (18) for the pipe pulling mechanism,
-the set of two or more flattener rollers (10) being suspended in an actuator mechanism (17) for flattener rollers, wherein the actuator mechanisms (17, 18) for flattener rollers and the pipe pulling mechanism are mounted in a rig frame (19).
In another aspect the invention relates to a petroleum well casing (00) or tubing recovery method comprising the steps of
- provide a rig frame (19) with a pipe pulling mechanism (11) and flattener rollers (10) on said well, - pulling casing (00) or tubing out of a well by means of a pipe pulling mechanism (11) in a generally continuous manner,
- flattening said casing (00) or tubing to a flattened casing or tubing belt (12) using a set of two or more flattener rollers (10) while said casing (00) or tubing emerges from said pipe pulling mechanism (11),
- conveying the resulting flattened casing or tubing belt (12) away from the well, wherein, before the step of pulling said casing (00) or tubing,
- run a wireline conveyed casing cutter tool (75) to a target depth and cut said casing (00) or tubing, - pull said wireline conveyed casing cutting tool (75) out of hole,
and
pull and flatten said casing (00) or tubing into a flattened casing or tubing belt (12),
- after pulling said casing (00) or tubing , run wireline tools such as cleaning or well logging tools including such wall thickness log, cement bonding log, for cleaning a wall of a previously surrounding casing and/or logging the well after removal of said casing (00) or tubing .
There are significant advantages of the invention:
The invention relates to removal of a string of pipe used to produce oil and gas (tubing) or pipe used to support the borehole (casing) in oil or gas well. The invention can be used to recover/remove casing or tubing from a wellbore more efficiently than current methods used when performing permanent plug and abandonment or slot recovery of wellbores.
Usually, pipe recovery operations are conducted using a high day rate heavy intervention rig in a socalled in-line operation with the tubing conveyed casing or tubing removal procedures, normally involving bridge plug setting, perforation, washing and cementing operations. Moving this pipe recovery operation to an offline activity wherein the main drilling rig is not required, and reducing time spent to recover pipe, will have a significant impact on well cost, as the time spent on the heavy intervention rig for a particular well is reduced. Reducing the main rig activity in permanent plug and abandonment and / or slot recovery of wellbores will have a positive impact on oil or gas well cost.
The casing (00) or tubing may according to the invention be pulled in a generally continuous process out of the well. With the present invention, the casing (00) or tubing is not halted for each "stand" of two or three pipe sections and the stands broken out into casing sections and stored in the pipe rack, but continuously pulled up and flattened to a flattened casing or tubing belt (12) of flattened steel casing (00) or tubing. In an embodiment of the invention the flattened casing or tubing belt (12) is wound up on a coil drum to a casing or tubing belt coil (14). In another embodiment the flattened casing or tubing belt (12) is cut into flat belt sections (16) and stacked away in baskets (44) or containers for removal as steel waste. These embodiments both save much storage space in the pipe rack, and allows the resulting compact casing or tubing belt coil (14) or stack of flat belt sections (16) having far less volume than corresponding generally empty, stored casing or tubing stands, to be exported for steel recovery elsewhere. The process saves time and space.
The process of the present invention may be done on a free well slot while active well operations such as drilling, whipstock operations, cementing, etc. is conducted on another well slot. In this manner, the present invention saves time, too.
The embodiment of the invention involving wireline conveyed tools used for cutting the casing or tubing at the desired depth before pulling out of hole, saves much rig time. Further, the same wireline drum and equipment may be used after pulling the casing or tubing, to inspect the well and establish P&A barrier requirement before running the main rig for heavy intervention.
Embodiments of the invention
The invention relates to a petroleum well casing or tubing removal system
comprising
- a pipe pulling mechanism (11) arranged for pulling casing (00) or tubing out of a well, and
- a set of two or more flattener rollers (10) arranged for flattening said casing (00) or tubing to a flattened casing or tubing belt (12). Please see Fig.0.
in an embodiment of the invention the pipe pulling mechanism (11) comprises two or more rollers driven by a motor (M2) and supported in engaging actuators (18) which may be hydraulic actuators. In an embodiment the flattener rollers (10) are supported on axles (110) held by actuators (17), also those hydraulic. The actuators (18) and (17) may be mounted in an auxiliary rig frame (19) for being arranged on a well slot, independently from a drilling rig which may work on another well slot separately. A drilling rig usually has a derrick, a derrick crane, a drilling motor, a drilling swivel, a mud circulation system, and a cement injection system, all for operating on a drill pipe string with tools or piping run into the well. The costs for running such a heavy intervention rig may be about 200000 USD/day. The present invention's auxiliary rig frame does not need much of such components as the drilling rig does, and could cost as little as 20000 USD/day, and may remove the undesired or damaged old casing or tubing on a well in a slot, and prepare the well for subsequent plugging and abandonment and/ or sidetracking of the well by the heavy intervention rig moved to the same slot.
Preferably, in an embodiment of the invention, we pull the casing (00) or tubing in lengths of e.g.
100 -500 metres.
Further, in an embodiment of the invention, the recovery system has a conveyor mechanism (30) arranged for conveying said flattened casing or tubing belt (12) away from said well. In an embodiment the conveyor mechanism (30) is arranged for conveying said flattened casing or tubing belt (12) away from said well and to a coil drum (20), said coil drum (20) arranged for winding up said flattened casing or tubing belt (12) to a casing or tubing belt coil (14), necessarily with considerable force and torque required to wind the flattened, thick steel casing or tubing belt (12) onto a relatively small diameter coil, e.g. with an initial radius of 1/2 metres or more, up to a final radius of about 4 - 10 metres. Advantageously, the casing or tubing belt coil (14) may be transported away as steel recovery waste. A coil of e.g.4 m diameter and the with of the flattened casing or tubing belt (12) of flattened casing is easily secured and lowered to a supply vessel and may be stacked on deck, please see Fig.1.
In a very simple embodiment of the invention, the flattened casing or tubing belt (12) could, when being conveyed away from the well, be cut up into flat belt sections (16) and stored in their flattened straight state in a basket (44) or container, for being transported away.
Pulled casing or tubing are hollow pipes of equal diameter, which usually are stored broken up in lengths of three and three joints of 12 metres in a pipe stack outside the V-port of the derrick. Flat belt sections (16) would constitute a far more compact storage space than their corresponding pipes. Cutting the flattened casing or tubing belt (12) of flattened pipe is a possible embodiment we could implement through the present invention.
In an embodiment of the invention, the conveyor mechanism (30) is arranged for conveying said casing or tubing belt (12) away form said well and to a motorized coil drum (20), whereby the motorized coil drum (20) is arranged for winding up said flattened casing or tubing belt (12) of flattened pipe to a casing or tubing belt coil (14). Then the casing or tubing belt coil (14) could be transported away as steel recovery waste.
In other words, the invention is a method for petroleum well casing or tubing pipe recovery comprising the steps of:
- pulling casing (00) or tubing out of a well by means of a pipe pulling mechanism (11),
- flattening said casing (00) or tubing to a flattened casing or tubing belt (12) using a set of two or more flattener rollers (10),
- conveying the resulting flattened casing or tubing belt (12) away from the well.
In an embodiment of the invention we are using a conveyor mechanism (30) and we receive said flattened casing or tubing belt (12) on a coil drum (20), we wind up said flattened casing or tubing belt (12) of flattened casing or tubing to a casing or tubing belt coil (14), and we transport away said casing or tubing belt coil (14) for steel waste recovery.
In one aspect, this would resemble coiled tubing, but with a significant difference: Coiled tubing is usually stored on large-radius drums so as for avoiding bending the coiled tubing to a radius smaller than the elastic limit of the tubing, in order to avoid irreversible deformation to the tubing. In the present invention, permanent, plastic deformation of the casing (00) or tubing is no problem because it shall be sent to steel recovery and not direct re-use as casing or tubing pipe. Thus the radius of the coil drum (20) may be as small as otherwise desired by the mechanical designer, without regard to the deformation of the flattened casing or tubing belt (12) to a casing or tubing pipe belt coil (14).
Coiled tubing is useful steel for being fed into a well, wherein its properties must be maintained, and permanent deformation avoided. Used casing or tubing taken out of a well is waste, and may be handled in a way resulting in permanent deformation.
In an embodiment of the invention, said set of two or more flattener rollers (10) are arranged above said pipe pulling mechanism (11). Please see Fig.0, Fig.1, Fig.2, and Fig.3.
According to the invention, also shown in the drawing, the set of two or more flattener rollers (10) are arranged separately and above said pipe pulling mechanism (11). The pipe pulling mechanism (11) may be a set of two or more gripping and pipe pulling rollers, drums or belts, with some rugged friction mechanism such as studs, for engaging the casing (00) or tubing before it reaches a deformation zone of the flattener rollers (10). The pulling rollers of the pipe pulling mechanism (11) would be arranged enveloping the casing (00) or tubing. This would ensure that the casing (00) or tubing is evenly pulled and held over the well, even if the casing or tubing should partly or entirely disassemble in threaded casing joints usually separated by 12 metres for the casing example. Then the flattener rollers (10) have the separate role of flattening the casing or tubing pipe (00) with its threaded casing or tubing joints, to a flattened casing or tubing belt (12) of small thickness and large width of approximately 1/2 (2 pi R) = pi R = 1/2 Ø pi, or roughly 1.6 times the casing diameter. The casing or tubing joints will form thickened portions of the belt, but would otherwise be flattened, too. The flattened casing or tubing joints would be more or less randomly distributed around and inside the resulting casing or tubing pipe belt coil (14).
In an embodiment of the invention the flattener rollers (10) are driven by a motor (M1). The motor (M1), or a separate motor (M2), may drive the pipe pulling rollers (11). In an embodiment of the invention the flattener rollers (10) are provided with studs (101) for engaging the casing or tubing pipe (00), and so may the pulling rollers of the pipe pulling mechanism (11) have.
In an embodiment of the invention the flattener rollers (10) are arranged as a parallel pair with generally horizontal axes (110), i.e. the axes (110) are arranged transverse to the axis of the out coming casing (00) or tubing, please see Fig.2.
Some rough calculations
The casing (00) or tubing of e.g. Ø=244 mm (95/8'') will have a wall thickness of about 9, 10, 11 mm (0.35'' - 0.4'' - 0.435'') typical for many Norwegian wells, so the flattener rollers (10) should flatten the generally cylindrical casing to a belt (12) with thickness of the double wall thickness, to 18, 20, 22 mm (0.70'' - 0.80'' - 0.87'') thickness and a width of approx.384 mm (151/9''. Please see the below table.
So the motorized drum (20) would coil up about 90 litres of steel for each length of 12 meter 95/8'' casing, in a coiled belt (14) of width less than 400 mm. Such a casing or tubing belt coil (14) on a drum (20) could store 500 metres of casing or tubing within a flat disc of height 400 mm and a diameter of less than 4 metres. The dimensions used above may of course be replaced with other commonly used casing or tubing dimensions according to the need of the well owner or operator.
In an embodiment of the invention, please see Fig.4, the method of the invention comprises the following steps conducted on a well from which a casing (00) or tubing shall be removed:
- run a wireline conveyed casing cutting tool (75) to a target depth and cut said casing (00) or tubing, - pull said wireline conveyed casing cutting tool (75) out of hole,
- provide a rig frame (19) with a pipe pulling mechanism (11) and flattener rollers (10) on said well, and pull and flatten said casing (00) or tubing into a flattened casing or tubing belt (12), which is removed according to either embodiment of the invention described above;
- run wireline tools such as cleaning or well logging tools including such wall thickness log, cement bonding log, for cleaning a wall of a previously surrounding casing and/or logging the well after removal of said casing (00) or tubing.
According to an embodiment of the invention, there is arranged a wireline drum (71) with a wireline (72) arranged for lowering a wireline conveyed casing cutter tool (75) into the well for severing said long length of casing (00) or tubing to be recovered from the well, and arranged for removing said wireline conveyed casing cutter tool (75) from the well before engaging said flattener rollers (10) with said severed casing (00) or tubing.
When preparing for the wireline operation before the pull and squeeze operation, the set of two or more flattener rollers (10) will be separated and out of squeezing engagement with the casing (00) or tubing when the wireline operations conduct one or more of the following:
- internal cleaning of the casing (00) or tubing,
- perforation and annulus washing of the casing (00) or tubing in order to release the casing or tubing from being stuck in cement or debris,
- running the wireline conveyed casing cutter tool (75)
- setting a bridge plug for preparing further operations such as cementing for plugging or installation of a whipstock for sidetracking.
In an embodiment of the invention the wireline conveyed casing cutter tool (75) is a motorized rotating knife tool severing the casing (00) or tubing at the desired depth.
Alternatively, instead of pulling said wireline conveyed casing cutting tool (75) out of hole, sacrifying the wireline conveyed casing cutting tool (75) and the wireline (72) in the well; which will save some time. This is particularly useful In an embodiment of the invention wherein the wireline conveyed casing cutter tool (75) is an explosive tool.
Claims (13)
1. A petroleum well casing or tubing recovery system comprising
- a pipe pulling mechanism (11) arranged for pulling casing (00) or tubing out of a well, and
- a set of two or more flattener rollers (10) arranged for flattening said casing (00) or tubing to a flattened casing or tubing belt (12), characterized in that
the pipe pulling mechanism (11) is suspended in an actuator mechanism (18) for the pipe pulling mechanism, the set of two or more flattener rollers (10) are suspended in an actuator mechanism (17) for flattener rollers, wherein the actuator mechanisms (17, 18) for the flattener rollers and pipe pulling mechanism are mounted in a auxiliary rig frame (19).
2. The petroleum well casing or tubing recovery system of claim 1, comprising
- a conveyor mechanism (30) arranged for conveying said flattened casing or tubing belt (12) away form said well and to a coil drum (20),
- said coil drum (20) arranged for winding up said flattened casing or tubing belt (12) to a casing or tubing belt coil (14).
3. The petroleum well casing or tubing recovery system of claim 1,
-wherein the pipe pulling mechanism (11) comprises a set of two or more pipe pulling rollers, drums, pipe pulling belts or jacking mechanism.
4. The petroleum well casing or tubing recovery system of claim 1 or 2,
- wherein said set of two or more flattener rollers (10) are arranged above said pulling mechanism (11).
5. The petroleum well casing or tubing recovery system of any of the preceding claims,
- wherein said set of two or more flattener rollers (10) are driven by a motor (M1).
6. The petroleum well casing or tubing recovery system of any of the preceding claims,
- wherein said set of two or more flattener rollers (10) and/or said pulling rollers are provided with studs for engaging the casing (00) or tubing.
7. The petroleum well casing or tubing recovery system of any of the preceding claims,
- wherein said flattener rollers (10) are arranged as a parallel pair with generally horizontal axes (110), i.e. the axes (110) are arranged transverse to an axis of the out coming casing (00) or tubing .
8. The petroleum well casing or tubing recovery system of claim 7,
- wherein axles (110) are suspended in the actuator mechanism (17) for the flattener rollers arranged for moving said flattener rollers (10) into or out of flattening engagement with said out coming casing (00) or tubing .
9. The petroleum well casing or tubing recovery system of claim 3,
- wherein the actuator mechanism (18) for the pipe pulling mechanism is arranged for moving the set of two or more rollers into and out of pulling engagement with said out coming casing (00) or tubing pipe.
10. The petroleum well casing or tubing recovery system of any of claims 1 – 9, comprising
- a wireline drum (71) with a wireline (72) arranged for lowering a wireline conveyed casing cutter tool (75) into the well for severing said long length of casing (00) or tubing to be recovered from the well, and arranged for removing said wireline conveyed casing cutter tool (75) from the well before engaging said flattener rollers (10) with said severed casing (00) or tubing.
11. A petroleum well casing or tubing recovery method
comprising the steps of
-provide a auxiliary rig frame (19) with a pipe pulling mechanism (11) and a set of two or more flattener rollers (10) on said well,
- pulling casing (00) or tubing out of a well by means of a pipe pulling mechanism (11) in a generally continuous manner,
- flattening said casing (00) or tubing to a flattened casing or tubing belt (12) using said set of two or more flattener rollers (10) while said casing (00) or tubing emerges from said pipe pulling mechanism (11) , and
- conveying the resulting flattened casing or tubing belt (12) away from the well, characterized in that before the step of pulling said casing (00) or tubing pipe,
-run a wireline conveyed casing cutter tool (75) to a target depth and cut said casing (00) or tubing pipe,
-pull said wireline conveyed casing cutting tool (75) out of hole, and
pull and flatten said casing (00) or tubing into a flattened casing or tubing belt (12),
-run wireline tools such as cleaning or well logging tools including such wall thickness log, cement bonding log, for cleaning a wall of a previously surrounding casing and/or logging the well after removal of said casing (00) or tubing.
12. The method of claim 11, comprising:
- receiving said flattened casing or tubing belt (12) on a coil drum (20),
- winding up said flattened casing or tubing belt (12) to a casing or tubing belt coil (14), transporting away said casing or tubing belt coil (14) for steel waste recovery.
13. The method of claim 11, comprising
- cutting said flattened casing or tubing belt (12) into flat belt sections (16) as said flattened casing or tubing belt (12) emerges from said set of two or more flattener rollers (10) and storing said flat belt sections (16) in one or more baskets (44) or containers for steel waste recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20200492A NO347304B1 (en) | 2020-04-23 | 2020-04-23 | A system and method for a petroleum casing or tubing recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20200492A NO347304B1 (en) | 2020-04-23 | 2020-04-23 | A system and method for a petroleum casing or tubing recovery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO20200492A1 NO20200492A1 (en) | 2021-10-25 |
| NO347304B1 true NO347304B1 (en) | 2023-09-04 |
Family
ID=78668836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20200492A NO347304B1 (en) | 2020-04-23 | 2020-04-23 | A system and method for a petroleum casing or tubing recovery |
Country Status (1)
| Country | Link |
|---|---|
| NO (1) | NO347304B1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4154310A (en) * | 1976-09-27 | 1979-05-15 | Konstantinovsky Miron S | Method and equipment for drilling wells |
| WO2000026500A1 (en) * | 1998-10-29 | 2000-05-11 | Shell Internationale Research Maatschappij B.V. | Method for transporting and installing an expandable steel tubular |
| NO20200254A1 (en) * | 2020-03-03 | 2021-09-06 | Archer Oiltools As | A petroleum well casing or tubing pipe recovery system and a method for pipe recovery |
-
2020
- 2020-04-23 NO NO20200492A patent/NO347304B1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4154310A (en) * | 1976-09-27 | 1979-05-15 | Konstantinovsky Miron S | Method and equipment for drilling wells |
| WO2000026500A1 (en) * | 1998-10-29 | 2000-05-11 | Shell Internationale Research Maatschappij B.V. | Method for transporting and installing an expandable steel tubular |
| NO20200254A1 (en) * | 2020-03-03 | 2021-09-06 | Archer Oiltools As | A petroleum well casing or tubing pipe recovery system and a method for pipe recovery |
Also Published As
| Publication number | Publication date |
|---|---|
| NO20200492A1 (en) | 2021-10-25 |
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