NO346525B1 - Ball valve tool - Google Patents

Ball valve tool Download PDF

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Publication number
NO346525B1
NO346525B1 NO20210278A NO20210278A NO346525B1 NO 346525 B1 NO346525 B1 NO 346525B1 NO 20210278 A NO20210278 A NO 20210278A NO 20210278 A NO20210278 A NO 20210278A NO 346525 B1 NO346525 B1 NO 346525B1
Authority
NO
Norway
Prior art keywords
tool
ball valve
drill pipe
piston
pipe string
Prior art date
Application number
NO20210278A
Other languages
Norwegian (no)
Other versions
NO20210278A1 (en
Inventor
Bjørn Tore Torvestad
Jarle Varhaug
Original Assignee
Archer Oiltools As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Archer Oiltools As filed Critical Archer Oiltools As
Priority to NO20210278A priority Critical patent/NO346525B1/en
Priority to PCT/NO2022/050059 priority patent/WO2022186702A1/en
Priority to GB2202917.7A priority patent/GB2604454B/en
Publication of NO20210278A1 publication Critical patent/NO20210278A1/en
Publication of NO346525B1 publication Critical patent/NO346525B1/en

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Classifications

    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
    • 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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
    • E21B23/06—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for setting packers
    • 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
    • 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
    • E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of 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
    • 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
    • E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
    • E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window
    • 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
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
    • E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • E21B34/12—Valve arrangements for boreholes or wells in wells operated by movement of casings or tubings
    • 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
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/04—Ball valves

Description

Introduction
The present invention relates to a downhole tool for utilizing drill pipe string pressure and flow for actuating an annular piston sleeve to actuate a tool component. More specifically, the tool component is a packer or a cutter assembly. The tool is used for cutting a casing or for setting a packer in the casing, or a combination of cutting a casing and setting a packer above the cut in order to test formation integrity, or rather the possibility of circulating fluid through the cut made in the casing when the toolstring annulus is closed, in order to indicate that the severed-off casing section is more or less free to be pulled out of hole. Further, the invention may be used for utilizing drill pipe string pressure and flow for shutting a ball valve element in the tool in order to exert a pressure in the toolstring above the closed ball valve so as for setting a spear, setting an anchor in a casing above the severed-off casing section, and actuating a jack on said anchor in order to utilize an elevated pressure to jack free the severed-off casing section the stroke length of the jack, and, if required, to repeat the anchor-and-jack operation until the entire toolstring with the severed-off casing section may be pulled out of hole, i.e. out of the well.
Background art
In the background art known from heavy intervention casing pipe recovery, it is known to run drill pipe conveyed cutter tool with a spear. The casing pipe recovery process may comprise the following steps:
* A bridge plug and a cement plug is formed below the desired cut.
* The cutter tool is activated by a drop ball and pressure is set in order to move a piston to extend its knives, and the casing is rotation cut.
* The spear is activated by a new ball dropped and tension is set on the drill pipe string to test whether the cut off casing section is free.
* If the cut-off casing is now free, pressure is decreased, the spear is released and pulled up to engage the top of the cut off casing section and again set,
* The casing is pulled out of hole.
The background art casing cutting and pulling process is slow and allows only short sections to be cut at a time. Once a ball is dropped to activate the cutter tool or spear the ball drop may usually not be undone, drilling fluid will be trapped above the ball, and one has to pull the drill pipe string in a wet condition out of hole, which is an undesirable mud-spilling experience on the drilling deck. It is desirable to have more flexibility in closing and opening a main bore of a drill pipe string conveyed toolstring, particularly when several tools are combined.
NO20191033 describes a drill pipe string conveyed casing cutter tool comprising with casing cutter knife arms rotatable on pivot axles, the knife arms retractable into recesses in the main body. It has a spring-loaded piston sleeve with central bore axially arranged in the main body. The piston sleeve is provided with a ball valve actuated by a translation of a piston sleeve so as for shutting said central bore so as for when pressure is set from surface through said drill pipe string and said ball valve thus is closed, said piston will move and actuate said knife arms to a cutting position, for rotation cutting an inner wall of a casing when said drill pipe string is rotated. It has a lateral passage for circulation when the ball valve is closed.
US3971438 describes in col.6 lines 6 to 31 a ball valve with a cap, and in a cosed position the cap has an opening/port where fluid can flow through the cap port to equalize pressure across the ball valve.
GB2544136 describes a circulation subasembly comprising a ball valve, a piston, and a seleee with adjustable stroke stoppers, arranged to be electromechanicaly controled to stop the piston sleeves at three seectable positons for : ball valve in a flow through condition, ball valve in partial bypass condition, and ball valve to closed position.
A problem of the prior art is to provide a tool which may actuate to extend the knives of the cutter tool or to set the packer above the cut, or a combination of the two, without having to drop a ball in order to actuate the knives or the packer.
It is further difficult to test whether there is circulation, or sufficient circulation capacity in the casing annulus of the severed-off casing, i.e. whether the severed-off casing is probably free, or needs washing through the cut, before trying to pull it out of hole.
Brief summary of the invention
A solution to the problem is provided by the invention of claim 1. The invention is a drill pipe string conveyed ball valve tool (10, 20, 30) comprising:
- a mandrel (101, 201, 301) with a through bore (102, 202, 302) connectable to said drill pipe string and having an axially stroking main piston (103, 203, 303) and piston rod (104, 204, 304) having an axial through bore (105, 205, 305), arranged in said through bore (102, 202, 302),
- said axially stroking piston rod (104, 204, 304) mechanically controlling
- an auxiliary ball valve element (106, 206, 306) having a full main bore and a restricted transverse bore (109, 209, 309), and arranged in said piston rod (104, 204, 304),
- said piston rod (104, 204, 304) having
- an initial stroke length (L0) arranged for allowing fully open said auxiliary ball valve element (106, 206, 306),
- a first stroke length (L1) arranged for
- allowing said auxiliary ball valve element (106, 206, 306) to turn said restricted transverse bore (109, 209, 309) into an axial flow path of said central bore (105, 205, 305), and
- for aligning a radial port (116, 216, 316) from said piston rod (104, 204, 304) to communicate with a tool actuator piston chamber (114, 214, 314) of said mandrel (101, 201, 301) to a tool actuator piston (113, 213, 313) arranged for actuating a tool component (111, 211, 311),.
- further comprising an electromechanical unit (118, 218, 318) arranged for adjusting a stroke length control mechanism (108, 208, 308) for selectively allowing said different stroke lengths (L0, L1), respectively.
The invention is also a method for actuating a tool component (111, 211, 311),
the method comprising
- providing a ball valve tool (10, 20, 30) above,
- assembling said ball valve tool (10, 20, 30) of claim 1 on a drill pipe string,
- said main piston (1032, 2032, 303) and said piston rod (104, 204, 304) being at said initial stroke length (L0) with said auxiliary ball valve element (106, 206, 306) fully open,
- running said ball valve tool (10, 20, 30) into a well to a desired depth for operating said tool component (111, 211, 311) on a first casing of said well,
- using an electromechanical unit (118, 218, 318) adjusting a stroke length control mechanism (108, 208, 308) for selectively allowing a first stroke length (L1),
- increasing pressure and / or flow in said drill pipe string to stroke said main piston (103, 203, 303) with said piston rod (104, 204, 304) to said first stroke length (L1) to turn said auxiliary ball valve element's (106, 206, 306) restricted transverse bore (109, 209, 309) into the axial flow path of said central bore (105, 205, 305), and
- allowing pressure in said drill pipe string to actuate said tool actuator piston (113, 213, 313) thus actuating saida tool component (111, 211, 311).
Figure captions
The invention and embodiments of the invention are illustrated in the attached drawings, wherein
Fig.1 illustrates a single auxiliary ball valve with nozzle - packer embodiment. It illustrates in a vertical section a drill pipe conveyed tool with an auxiliary ball valve with either a fully open bore or a transverse restricted bore is arranged to be aligned with the main bore of the tool. Please note that the cam mechanism and the axle for turning the auxiliary ball valve is shown 90 degrees out of their actual positions in order to facilitate the illustration. The embodiment illustrated has a packer assembly for sealing the toolstring annulus against a casing. Ports 116, 115 are not aligned, auxiliary ball valve 106 is not activated. Note: L0 delimiter actuated for circulation or cementing flow not to move piston.
Fig.2. illustrates the same tool as in Fig.1 and shows the ball valve element turned with its restricted bore (or nozzle) into alignment with the main bore, and a tool actuating piston 113 is hydraulically actuated to mechanically actuate a tool component, in this case the packer assembly.
Fig.3 illustrates in a vertical section an embodiment of a drill pipe conveyed tool with an auxiliary ball valve as in Fig.1, but wherein the embodiment illustrated has a knife assembly arranged for cutting a casing.202 is the central bore of mandrel 201, varying diameter depending on parts of 204 piston rod.205 indicates axial through bore through main piston 203 and main piston rod 204 having large bore at least 11/2 '', sufficient for allowing assage of cement and circ. of well fluid, preferably >= 21/2''. Note: The L0 delimiter actuated for circulation or cementing flow not to move piston.
Fig.4 illustrates a tool similar to the one in Fig.2, with the main difference being that instead of the tool actuating piston actuating a packer, it actuates a knife assembly in order to cut a surrounding casing. Note: L1 delimiter actuated in order to allow to move piston to close auxiliary ball valve.
Figs.5, 6, and 7 illustrate a dual ball valve embodiment with main ball valve and auxiliary ball valve with nozzle and packer.
Fig.5 illustrates in a vertical section an embodiment of a drill pipe conveyed tool similar to the tool illustrated in Fig.1, with the addition of a main ball valve, wherein both ball valves are in their fully open position.
Fig.6 illustrates a first stroke length actuated piston length of the tool of Fig.5, wherein the auxiliary ball valve element is turned to have its restriction in the main bore, flow and pressure is increased to actuate the annular sleeve piston to actuate the packer e.g. against a casing, while allowing circulation through the tool's restriction. This embodiment may be used for testing circulation below the set packer, e.g. through a cut made by the cutter tool.
Fig.7 illustrates a second stroke length actuated piston length of the tool of Fig.5 and 6, wherein the main ball valve is closed so as for providing the possiblity of excerting a further elevated pressure on the drill pipe string conveyed tool and toolstring above the closed ball valve element. In this position the tool actuating piston is released and the packer is retracted. The further elevated pressure in the drill pipe string may be utilized to set a spear, to set an anchor above the spear, and to actuate said anchor to jack out a casing section.
Fig.8 is an illustration of an embodiment of the invention including a drill pipe string conveyed combination of a cutter tool and a packer tool, wherein the auxiliary ball valves of both are open (and also a main ball valve of the packer tool). One may run the toolstring into hole and cement through the full bore of both tools.
Fig.9 is an illustration of the toolstring embodiment of Fig.8 wherein pressure is increased and a piston and piston rod of the cutter tool is allowed to stroke to a first stroke length (in the cutter tool) to shift the auxiliary ball valve element's restricted bore into the main bore, which will dynamically increase the pressure above the restriction while allow flow through the auxiliary ball valve, and extend the knives and rotation-cut the casing.
Fig.10 is an illustration of a further step from the situation in Fig.9, wherein the pressure has been released to allow knife retraction, and the packer tool set to allow a first stroke length of the piston and piston rod and its auxiliary ball valve to shift its transverse restriction 90 degrees into the main bore and dynamically increase the pressure to set the packer. Now a circulation test through the cut casing may be performed in order to indicate whether the severed-off casing section 's annulus is free, and possibly allow to wash the annulus.
Fig.11 illustrates a further step from the situation in Fig.10, wherein circulation in the casing annulus about the severed-off casing section is confirmed, the main ball valve of the packer tool is closed to allow an increase of the pressure in the drill pipe string. Now a spear may be set using the spear, and the toolstring and the severed-off casing may be pulled out of hole. If not possible to pull out directly, one may use the increased pressure to set an anchor and jack out the severed-out casing.
Fig.12 illustrates an embodiment of the wider application of the invention using a combined cutter tool, a packer tool, a spear, all for operating in a first casing, combined via a space-out drill pipe string to an above anchor and jack tool for use in an above, wider casing. The cutter tool auxiliary ball valve is activated and thus the packer piston actuates the knives, the tool is rotated and cuts the casing while fluid is circulated via the restricted bore still allowing some flow.
Fig.13 illustrates a further step after the cut has been made and the knives are retracted. The auxiliary ball valve of the packer tool is allowed to be stroked a first length and turn its restricted nozzle into the flow; the pressure dynamically increases and is led to the sleeve piston which sets the packer onto the casing section above its cut. Fluid is now circulated via the cut to test whether there is annulus circulation (a perforation below the casing shoe may be required).
Fig.14 illustrates a further step after casing annulus circulation is confirmed. The packer tool is released, the toolstring is pulled up and the ball valve of the packer (or a main or auxiliary ball valve of the spear tool) is closed and pressure is increased to set the slips of the spear tool. When pulling on the space-out drill pipe string the slips will tighten further even if pressure is not maintained, so pressure may be released, the jack stroked out, and the anchor set. Then pressure is increased further and the spear is jacked in the direction of the anchor.
Fig.15 illustrates an embodiment of the invention similar to the one in Figs.1 and 3 with two main differences: Firstly, it has a slips assembly replacing the packer assembly of Fig.1 or the knife assembly of Fig.3. Moreover, the tool actuating piston sleeve has been turned to work downwardly in order to compress the slips assembly towards an upwardly facing shoulder of the tool mandrel. In this way the upwardly facing shoulder of the tool mandrel will maintain its force onto the lower part of the slips assembly and thus under drill pipe string tension maintain a holding force of the slips onto a casing, even if the pressure releases. This may allow pulling on the drill pipe string and the slips maintaining the grip on the severed-off casing section and allow stroking out a jack before increasing the pressure to set the anchor and further increasing the pressure to jack loos the severed-off casing section.
Fig.16 shows, like Fig.15, a single auxiliary ball valve with nozzle in a spear or anchor embodiment with DP string hold force maintenance. Here, pressure is increased, flow is increased, auxiliary ball valve is actuated, then the channels 316 and 315 are aligned, and slips are set.
Embodiments of the invention
Below the embodiments of the invention are described. The invention provides A drill pipe string conveyed ball valve tool (10, 20, 30) comprising:
- a mandrel (101, 201, 301) with a through bore (102, 202, 302) connectable to said drill pipe string and having an axially stroking main piston (103, 203, 303) and piston rod (104, 204, 304) having an axial through bore (105, 205, 305), arranged in said through bore (102, 202, 302), wherein
- said axially stroking piston rod (104, 204, 304) mechanically controls
- an auxiliary ball valve element (106, 206, 306) having a full main bore and a restricted transverse bore (109, 209, 309), and arranged in said piston rod (104, 204, 304), and wherein
- said piston rod (104, 204, 304) having
- an initial stroke length (L0) arranged for allowing fully open said auxiliary ball valve element (106, 206, 306),
- a first stroke length (L1) arranged for allowing said auxiliary ball valve element (106, 206, 306) to turn said restricted transverse bore (109, 209, 309) into an axial flow path of said central bore (105, 205, 305), and
- for aligning a radial port (116, 216, 3016) from said piston rod (104, 204, 304) to communicate with a tool actuator piston chamber (114, 214, 314) of said mandrel (101, 201, 301) to a tool actuator piston (113, 213, 313) arranged for actuating a tool component (111, 211, 311).
The stroke lengths (L1) for the different embodiments of the packer tool , the cutter tool, and the spear tool discussed above and below may be different depending on the actual design of each tool, and could have been indicated as L1-1, L1-2, L1-3, but we have used the simpler notation L1. The stroking of said main piston may take place when a sufficient differential pressure across the piston and rod exceeds the bias force of a bias return spring (119, 219, 319) arranged for biasing the main piston (103, 203, 303) and said piston rod (104, 204, 304) towards the initial position (L0). Please notice that a flow through the central bore (105, 205, 305) creates a dynamic pressure. Advantageously, the bias return spring force holds the piston and rod in the initial position (L0) when cementing through the axial through bore (105, 205, 305) of the main piston and piston rod, and also during washing fluid circulation after cementing. In an embodiment, there is arranged an electromechanical unit (118, 218, 318) arranged for adjusting a stroke length control mechanism (108, 208, 308) for selectively allowing said different stroke lengths (L0, L1), respectively. If this is set to stroke length (L0) the main piston (103, 203, 303) and piston rod (104, 204, 304) will not start moving beyond (L0) which normally is the fully retracted position. The stroke length control mechanism may in its simplest embodiment be exploiting different levels of pressure required to overcome the bias force of the bias return spring (119, 219, 319).
In an embodiment of the invention the piston rod fluid port (116, 216, 316) is arranged above / proximally relative to said auxiliary ball valve element (106, 206, 306).
In an embodiment of the invention the mandrel fluid port (115, 215, 315) is unaligned with said piston rod's (104, 204, 304) fluid port (116, 216, 316) when said piston rod (104, 204, 314) in the initial piston stroke length (L0). This is an additional advantage when cementing and washing, and the ports (115, 116, 215, 216, 315, 316) are closed during cementing in order to avoid blocking and cement leakage into the piston cylinder.
In an embodiment the tool further comprises an electromechanical unit (118, 218, 318) arranged for adjusting a stroke length control mechanism (108, 208, 308) for selectively allowing said different stroke lengths (L0, L1), respectively. However the different stroke length mechanisms may be made up of purely mechanical index mechanisms which are set and unset using pressure pulses such as for first activating the auxiliary ball valve (206) controlling the knife assembly , then the auxiliary ball valve mechanism (106) controlling the packer assembly, and subsequently the auxiliary ball valve mechanism (306) controlling the spear slips assembly.
In an embodiment such a stroke length control mechanism (108, 208) comprises an actuator of said electromechanical unit (118) arranged for shifting abutment such as protrusions in or out of engagement with corresponding abutments of the piston rod (104, 204, such as illustrated by "L0 delimiter", "L1 delimiter" in Figs.1, 2, 3, 4, and further by "L2 delimiter" in Figs. 5, 6, 7.
Main piston bias return spring (119, 219, 319)
In an embodiment of the invention the tool further comprises a bias return spring (119, 219, 319) arranged for biasing the main piston (103, 203, 303) and said piston rod (104, 204, 304) towards the initial position (L0).
Tool (packer/knives) piston return spring (120, 220, 320)
In an embodiment of the invention the tool further comprising a tool actuator piston bias spring (120, 220) arranged for returning said tool actuator piston (113, 213, 313) when pressure in said piston chamber (114, 214) is released below a given pressure level.
In an embodiment of the invention the release pressure level for the tool actuator piston bias spring (120, 220, 320) is similar to the pressure required for moving the main piston (103, 203, 303) and the piston rod (104, 204, 304) to the first stroke length (L1) where the radial port (116, 216, 316) from said piston rod (104, 204, 304) is aligned with the mandrel port (115, 215, 315) to communicate with the tool actuator piston chamber (114, 214, 314). This means that when the pressure increases beyond the pressure required for reaching the first stroke length (L1) the actuated auxiliary ball valve (106, 206, 306) will close and present only the flow restriction bore (109, 209, 309) to the flow in the piston rod bore (105, 205, 305), and the dynamic pressure will increase so as for actuating the tool actuator piston (113, 213, 313), further actuating the tool component (111, 211, 311) such as the knife assembly (211) or the packer assembly (111).
Oppositely, when the pressure on the actuated auxiliary ball valve (106, 206, 306) falls below the actuation pressure for the tool actuator piston chamber (114, 214, 314), the tool actuator piston (113, 213, 313) due to the bias force of the piston actuator bias spring (120, 220, 320), retracts the knives (212) or packer (112) (or slips (312)) and empty the tool actuator piston chamber, and a further decrease in the pressure will start returning the main piston (103, 203, 303) with the piston rod (104, 204, 304) from position (L1), close the port (116, 216, 316), open the auxiliary ball valve (106, 206, 306) fully (which will reduce the dynamic pressure on the piston rod (104, 204, 304) and move to stroke position (L0).
In an embodiment of the invention the tool's electromechanical unit (118, 218, 318) is arranged for being remote controlled by a signal. Preferably, said signal is sent from the surface. The signal may be in the form of comprising a drill pipe string rotational signal pattern and / or a pressure signal pattern. In another embodiment the signal may be in the form of an electrical signal or an optical signal if using so-called "wired pipe". In an embodiment of the invention the electromechanical unit (118, 218, 318) is arranged for receiving the signal via a sensor, and for providing a control signal for a motor (110, 210, 310) to adjust said stroke length control mechanism (108) to allow the initial (L0) stroke length, the first stroke length (L1) or the second stroke length (L2).
An advantage of this embodiment of the invention is that one is not dependent on dropping a ball to activate the tool, and this saves otherwise very long circulation-in time for the ball, and particularly that one avoids the problem of otherwise very difficult undoing of a ball, and further one avoids the presence of a necessarily narrower ball seat for receiving a ball.
In an embodiment of the invention, in order to activate the electromechanical unit one may conduct a particular rotation pattern such as an otherwise unusual continuous rotation pattern of e.g.60 RPM on the drill pipe string for e.g. two minutes /120 s, in order to put the control electronics in a ready mode, then the control electronics will listen for similar specific distinct signal series of 60 RPM after new delays of 1 minute and 4 minutes, after 2 minutes and 4 minutes, and after 1 minute and 3 minutes:
L0: 1m 4m
L1: 2m 4m
L3: 2m 3m
Such RPM time signals may be combined with pressure signals also sensed by the electromechanical unit (118).
In an embodiment to enable re-set of the control electronics from ready mode to passive, one may bleed off the pressure for a given time, which is required to mechanically switch the control mechanism (108) anyway.
In an embodiment of the invention said electromechanical unit (118) is arranged distally / downhole relative to said auxiliary ball valve (106).
In an embodiment of the invention the the stroke length control mechanism (108, 208, 308) and the electromechanical unit (118, 218, 318) are arranged downhole from at least the main ball valve element (107, 207, 307). The force generated on the upper, main ball valve element (107, 207, 307) when closed and when operating under as high pressure as the driller desires to use, for jacking or other heavy force operations, will exert a strong tensile force on the piston rod (104, 204, 304) which holds the main ball valve element (107, 207, 307). Any port (116, 206, 316) in the piston rod (104, 204, 304) above the main ball valve element would represent an undesired weakening of the piston rod under high tension.
This aspect is not critical for the less axial force generating auxiliary ball valve element (106) may be arranged above the stroke length control mechanism (108, 208, 308), but it may also be placed below or beyond the stroke length control mechanism (108) because the axial force generated on the auxiliary ball valve element (106) is usually used for setting the packer (112) or knife assembly (211), and the axial tensile strength of the piston rod (104, 204, 304) is not as high as above the main ball valve element (107, 207, 307).
Piston (113) is for packer assembly (111) and packer element (112)
In an embodiment of the invention it further comprises a packer assembly (111) comprising a packer element (112) arranged around the mandrel (101) proximally/above the auxiliary ball valve element (106),
- wherein said piston (113) being axially slidable on the mandrel (101, 201) to actuate said packer assembly (111) with said element (112), for radially extending the packer element (112) to seal off the annulus (5) surrounding the tool (10).
When having actuated the auxiliary ball valve element (106, 206, 306) and increased the pressure and flow, the dynamically increased pressure above the auxiliary ball valve may be directed to actuate the piston (113) to compress the packer assembly with the packer (112) above the auxiliary ball valve. With the packer (112) set in a casing and the enabled pressure communication through the auxiliary ball valve (106) one may test pressure integrity of the casing below the packer, such as a cut or perforation made below the set packer (112). In this embodiment the valve tool of the invention may be used with a cutter tool arranged with the valve tool:
- Circulate in cement through the packer tool and valve tool (which may be combined), through the cutter tool at full bore and the packer not set. Wash out excess cement and let set.
- Run the cutter tool (20) and cut the casing.
- Activate the auxiliary ball valve (106) and increase flow to exert pressure at the packer (112) while communicating pressure to below the packer.
- Verify communication through the cut made in the casing.
Piston (213) is for knives assembly (211) and knives (212)
In an embodiment of the invention the tool (20) comprises a knife assembly (211) comprising knives (212) arranged about the mandrel (201) proximally/above the auxiliary ball valve element (206), please see Fig.3 and 4,
- wherein said piston (213) being axially slidable on the mandrel (201) to actuate said knife assembly (211)'s knives (212) and force them against a surrounding casing for cutting said casing.
A significant advantage of this embodiment of the invention is that one may continue to circulate fluid through the auxiliary ball valve aperture (209) during the cutting process in order to lubricate and cool the cutter tool and for circulating out swarf if necessary.
In an embodiment of the invention the tool is a spear tool (30) comprising
- a slips assembly (311) comprising slips (312) arranged about the mandrel (301) proximally/above the auxiliary ball valve element (306),
- wherein said piston (313) is arranged above said slips assembly (311) and arranged for pushing downward / distal direction,
- wherein said piston (313) being axially slidable on the mandrel (301) to actuate said slips assembly (311)'s slips (312) and force them against a surrounding casing for said spear tool (30) engaging and holding said casing.
An increased pressure and circulation on the auxiliary ball valve (306) may be directed to activate slips of the spear tool (30) in order to set the spear slips (312) while cutting the casing in order to sufficiently stabilizing the cutter tool to the intended axial position for making the cut. This is useful if the cutting operation is conducted from a heaving vessel or rig. The spear tool may be set by actuating the auxiliary ball valve (312) but hold maintained using pull up on the drill pipe string.
An advantage of having the tool actuating piston (313) arranged above the slips assembly (311) is that pressure may be set to engage and hold the slips (312) toward the casing, while pull on the drill pipe string will further force the slips (312) against the casing, which will increase the holding force and may allow increasing the pulling force on the drill pipe string.
A further advantage of having the tool actuating piston (313) arranged above the slips assembly (311) is that if one maintains the pulling force on the drill pipe string while releasing the pressure (accidentally or for some other reason), the shoulder of the mandrel body will still pull on the slips assembly and maintain the hold and pulling force on the casing. The spear tool (30) may be swivelled in order to allow setting the slips and hold while operating the below cutter tool (10).
Releasing the pressure and tension on the spear will release the spear from the surrounding casing.
A significant advantage of the above tools (10, 20, 30) is that we do not need to have drag blocks in order to operate the slips tool or packer tool.
Main ball valve element (107, 207, 307)
In an embodiment of the invention the drill pipe string conveyed ball valve tool (10, 20, 30)-further comprises a main ball valve element (107, 207, 307) having a full main bore and a transverse closed position, and
- said main piston (103, 203, 303) and said piston rod (104, 204, 304) further having a second stroke length (L2), arranged for allowing said main ball valve element (107, 207, 307) to turn to a closed position.
In a further embodiment of the invention said initial stroke length (L0) is also arranged for allowing fully open both said main ball valve elements (107, 207, 307) and said auxiliary ball valve elements (106, 206, 306).
In an embodiment of the invention said electromechanical unit (118, 218, 318) is further arranged for adjusting said stroke length control mechanism (108, 208, 308) for selectively allowing said second stroke length (L2).
In an embodiment of the invention said mandrel fluid port (115, 215, 315) is unaligned with the piston rod's (104, 204, 304) fluid port (116, 216, 316) when said piston rod (104, 204, 314) is in the second piston stroke length (L2).
An advantage of this arrangement allows for moving the main piston (103, 203, 303) and the piston rod (104, 204, 304) past the first stroke length (L1) to the second stroke length where the radial port (116, 216, 316) from said piston rod (104, 204, 304) is no longer aligned with the mandrel port (115, 215, 315) , no longer communicating with the tool actuator piston chamber (114, 214, 314). This means that when the stroke runs to the second stroke length, and the pressure increases beyond the pressure required for stroking only to the first stroke length (L1) the main ball valve (107, 207, 307) will close and the pressure in the piston rod bore (105, 205, 305), may be increased far beyond what was required for actuating the tool actuator piston (113, 213, 313), which should now release. Further increasing the pressure may now be done for e.g. setting slips of a spear in the cut-off section of the casing (if not using the spear tool (30), and may also be used for actuating slips in an anchor and a jack in an above wider casing, such as illustrated in Figs.12, 13, and 14, and pressure up for jacking, without setting the packer or extending the knives.
In an embodiment said auxiliary ball valve element (106, 206, 306) is arranged below said main ball valve element (107, 207, 307). such as shown in Figs.5, 6, and 7. In an embodiment of the invention such as shown in Figs.1 - 14, the main piston is at the proximal end of the piston rod (104, 204, 304).
(In an embodiment not shown in the drawings, the cutter tool embodiment (30) comprises a main ball valve element (307) in addition to the main ball valve)
In an embodiment of the invention the main ball valve (107, 207, 307) is arranged above /proximally relative to said piston rod fluid port (116, 216, 316).
An advantage of this embodiment is that the aperture forming the port (116, 216, 316) in the rod (104, 204, 304) which otherwise would form a weakening of said rod (104, 204, 304), is thus arranged distally relative to the pressure and force acting on the main ball valve (107, 207, 307). This is important when the main ball valve (107, 207, 307) shall be subject to a high pressure in it s closed state when the packer tool (10) is used for closing the main bore (102, 202, 302) so as for setting pressure for setting slips above the packer tool and for setting an an anchor for a jack in an above wider casing and jacking a cut-off section of the casing.
The Method of the invention
The invention provides a method for actuating a tool component (111, 211, 311) The method comprises
- providing a ball valve tool (10, 20, 30) of the invention
- assembling said ball valve tool (10, 20, 30) on a drill pipe string,
- preferably, said main piston (103, 203, 303) and said piston rod (104, 204, 304) being at said initial stroke length (L0) with said auxiliary ball valve element (106, 206, 306) fully open before running in, otherwise it must be set fully open at a later stage,
- running said ball valve tool (10, 20, 30) into a well to a desired depth for operating said tool component (111, 211, 311) in a first casing of said well
- increasing pressure and / or flow in said drill pipe string to stroke said main piston (103, 203, 303) with said piston rod (104, 204, 304) to said first stroke length (L1) to turn said auxiliary ball valve element's (106, 206, 306) restricted transverse bore (109, 209, 309) into the axial flow path of said central bore (105, 205, 305), and
- allowing pressure in said drill pipe string to actuate said tool actuator piston (113, 213, 313) thus actuating a tool component (111, 211, 311).
The tool component (111, 211, 311) may be different tool components such as a packer assembly, a knife assembly, or a slips assembly.
Advantageously, after running in the tool (10, 20) with the auxiliary ball valve (106, 206, 306) fully open, one may circulate in cement through the drill pipe string and through the tool (10, 20, 30) to form a cement plug in the casing before cutting the casing or circulation testing.
When the pressure and / or flow increases so the piston rod (104, 204, 304) strokes to the first stroke length (L1) the restriction (109, 209, 309) will dynamically increase the pressure above itself due to the restriction (109, 209, 309) in the flow so as to increase the pressure on the tool actuator piston (113, 213, 313) if the flow is generally maintained, or increased. But there will also be a "bypass" flow through the restriction (109, 209, 309) which is of less dynamic pressure below the auxiliary ball valve than what is acting on the tool actuator piston (113, 213, 313) and this bypass flow is very useful for circulating well fluid during cutting the casing and / or testing of the circulation through the cut and into the annulus.
Circulating in cement
In an embodiment of the invention it comprises, after running said ball valve tool (10, 20, 30) into said well to a desired depth in said first casing and having set said auxiliary ball valve element (106, 206, 306) fully open, circulating in cement into said casing below said ball valve tool (10, 20, 30).
Advantageously, after running in the tool (10, 20, 30) with the auxiliary ball valve (106, 206, 306) fully open (which will allow circulating when running in), one may then circulate in cement through the drill pipe string and through the tool (10, 20, 30) to form a cement plug in the casing before cutting the casing or circulation testing. Advantageously there is a cementing stinger arranged below the tool (10, 20, 30) for placing the cement, please see Fig.11.
Cut casing using knives assembly (211) and knives (212) to
In an embodiment of the invention it further comprises:
- while having said auxiliary ball valve (206) with said restriction (209) activated,
- said tool actuator piston (213) actuating said knife assembly (211) to extend said knives (212) out to said surrounding casing, Please see Fig.4
- rotating said drill pipe string and cutting out through said casing, please see Fig.9 or Fig. 12,
- releasing the pressure in said drill pipe string to return said tool actuator piston (213) and retracting said knives (212), please see Fig 13,
- releasing the pressure in said drill pipe string to return said piston (203) and said piston rod (204) to the initial stroke length (L0) while deactivating said auxiliary ball valve (206) to a fully open position.
In an embodiment of the invention, it comprises:
- while having said auxiliary ball valve (106) with said restriction (109) activated,
- sliding said piston (213) axially to actuate said packer assembly (111) and radially extending the packer element (112) to seal off the tool annulus (5) surrounding the tool (10), - pressure integrity testing the tool annulus (5) in said casing (6).
This may be done before or after making a cut with the cutter tool. Advantageously, one may test the packer (111) pressure integrity itself in the casing before making a cut, in order to verify its sealing effect in the casing, and release the packer from the casing. One may also advantageously activate the knives (211) and cut the casing and retract the knives (211). The packer (111) is then set to close the return path in the tool annulus and pressure may be set to test whether there is communication via the cut (7) in the inner casing, via the inner casing annulus, which may indicate that the severed-off section of the casing above the cut is free for being pulled. Please see Fig.10 or Fig.13. Then one may pull out the "fish", the severed-off casing section above the cut.
Setting a spear for pulling the casing
In an embodiment of the invention we set a spear tool in said cut-off section and pulling via said drill pipe string to test whether said cut-off section is free, and pulling said cut off section out of hole.
In an embodiment said spear tool is the spear tool (30), and comprises:
- while having said auxiliary ball valve (306) with said restriction (309) activated,
- sliding said piston (313) axially to actuate said spear assembly (311) and radially extending the spear elements (312) to engage and hold said casing (6). Please see Fig.16. This spear embodiment may be used in the context of Fig.14.
Setting an anchor and jacking
In a further embodiment of the invention illustrated in Figs.12 - 14, the method comprises: - providing a drill pipe conveyed pressure-activated anchor (40) and pressure-actuated jack tool (50) in combination with said spear tool, said packer tool (10) and said cutter tool (10), - after having cut said casing (3) and set said spear tool in said cut-off section of said inner casing (3),
- closing said main ball valve (107) in said packer tool (10), please see Fig.14,
(- optionally pull on said drill pipe string to extend the jack (50),)
- increasing pressure in said drill pipe string to set said anchor (40) in a second casing (4) above said cut-off section of said inner casing (3), please see Fig.14,
- increasing pressure in said drill pipe string further to jack said spear tool up in the direction of said anchor (40), thus forcefully releasing said cut-off section of said inner casing (3), please see Fig.14,
- releasing pressure in said drill pipe string sufficient to release said anchor (40) from said second casing (4) while maintaining hold on said cut-off section of said inner casing (3), - pulling the entire work string with said jack tool (50), anchor (40), spear tool with said cut-off section of casing (3) out of hole.
An advantage of using a pressure activated anchor (40) and pressure-actuated jack tool (50) in the work string is that combined with the spear tool, the packer tool (10) and the cutter tool (20), please see Fig.12, 13, and 14, one may conduct the entire operation of cutting the casing, testing if the casing section is free, and if not free, pulling the spear to the top in the cut-off section (please see Fig.14) , closing the main ball valve of the packer tool (10), further pressurizing to set the spear and the anchor, and further pressurizing to actuate the jack tool to rip out the stuck cut-off casing section forcefully. Then one may gradually release the pressure until the anchor, but not the spear, releases, and then pull the entire toolstring with the severed-off casing section out of hole. If still not free after first jacking, one may release the jack stroke and release the anchor and pull up to a new grip, pressure up and jack further, until the fish is sufficiently free to be jacked out.
Components list

Claims (22)

Claims
1. A drill pipe string conveyed ball valve tool (10, 20, 30) comprising:
- a mandrel (101, 201, 301) with a through bore (102, 202, 302) connectable to said drill pipe string and having an axially stroking main piston (103, 203, 303) and piston rod (104, 204, 304) having an axial through bore (105, 205, 305), arranged in said through bore (102, 202, 302),
characterized by
- said axially stroking piston rod (104, 204, 304) mechanically controlling
- an auxiliary ball valve element (106, 206, 306) having a full main bore and a restricted transverse bore (109, 209, 309), and arranged in said piston rod (104, 204, 304),
- said piston rod (104, 204, 304) having
- an initial stroke length (L0) arranged for allowing fully open said auxiliary ball valve element (106, 206, 306),
- a first stroke length (L1) arranged for
- allowing said auxiliary ball valve element (106, 206, 306) to turn said restricted transverse bore (109, 209, 309) into an axial flow path of said central bore (105, 205, 305), and
- for aligning a radial port (116, 216, 316) from said piston rod (104, 204, 304) to communicate with a tool actuator piston chamber (114, 214, 314) of said mandrel (101, 201, 301) to a tool actuator piston (113, 213, 313) arranged for actuating a tool component (111, 211, 311),
- an electromechanical unit (118, 218, 318) arranged for adjusting a stroke length control mechanism (108, 208, 308) for selectively allowing said different stroke lengths (L0, L1), respectively.
2. The drill pipe string conveyed ball valve tool (10, 20, 30) according to claim 1,
- wherein said piston rod fluid port (116, 216, 316) is arranged above / proximally relative to said auxiliary ball valve element (106, 206, 306).
3. The drill pipe string conveyed ball valve tool (10, 20, 30) according to any of claims 1 - 2, - wherein said mandrel fluid port (115, 215, 315) is unaligned with said piston rod's (104, 204, 304) fluid port (116, 216, 316) when said piston rod (104, 204, 304) in the initial piston stroke length (L0).
4. The drill pipe string conveyed ball valve tool (10, 20, 30) according to any of the preceding claims,
- further comprising a bias return spring (119, 219, 319) arranged for biasing the main piston (103, 203, 303) and said piston rod (104, 204, 304) towards the initial position (L0).
5. The drill pipe string conveyed ball valve tool (10, 20, 30) according to any of the preceding claims,
- further comprising a tool actuator piston bias spring (120, 220, 320) arranged for returning said tool actuator piston (113, 213, 313) when pressure in said piston chamber (114, 214, 314) is released below a given pressure level.
6. The drill pipe string conveyed ball valve tool (10, 20, 30) of any of the preceding claims, - wherein said electromechanical unit (118, 218, 318) is arranged for being remote controlled by a signal, said signal preferably sent from the surface, said signal comprising a drill pipe string rotational signal pattern and / or a pressure signal pattern, an electrical signal or an optical signal if using so-called "wired pipe".
7. The drill pipe string conveyed ball valve tool (10, 20, 30) of any of the above claims, - wherein said electromechanical unit (118, 218, 318) is arranged distally / downhole relative to said auxiliary ball valve (106, 206, 306).
8. The drill pipe string conveyed ball valve tool (10, 20, 30) of any of the preceding claims, further comprising
- a packer assembly (111) comprising a packer element (112) arranged around the mandrel (101) proximally/above the auxiliary ball valve element (106),
- wherein said piston (113) being axially slidable on the mandrel (101, 201) to actuate said packer assembly (111) with said packer element (112), for radially extending the packer element (112) to seal off the annulus (5) surrounding the tool (10).
9. The drill pipe string conveyed ball valve tool (10, 20) of any of the preceding claims, further comprising
- a knife assembly (211) comprising knives (212) arranged about the mandrel (201) proximally/above the auxiliary ball valve element (206),
- wherein said piston (213) being axially slidable on the mandrel (201) to actuate said knife assembly (211)'s knives (212) and force them against a surrounding casing for cutting said casing.
10. The drill pipe string conveyed ball valve tool (10, 20, 30) of any of the preceding claims, further forming a spear tool (30) comprising
- a slips assembly (311) comprising slips (312) arranged about the mandrel (301) proximally/above the auxiliary ball valve element (306),
- wherein said tool actuator piston (313) is arranged above said slips assembly (311) and arranged for pushing downward / distal direction,
- wherein said tool actuator piston (313) being axially slidable on the mandrel (301) to actuate said slips assembly (311)'s slips (312) and force them against a surrounding casing for said spear tool (30) engaging and holding said casing.
11. The drill pipe string conveyed ball valve tool (10, 20, 30) of any of the preceding claims, - further comprising a main ball valve element (107) having a full main bore and a transverse closed position,
- said main piston (103, 203) and said piston rod (104, 204) further having a second stroke length (L2), arranged for allowing said main ball valve element (107, 207) to turn to a closed position,
- said initial stroke length (L0) also arranged for allowing fully open both said main ball valve elements (107, 207) and said auxiliary ball valve elements (106, 206).
12. The drill pipe string conveyed ball valve tool (10, 20) according to any of claims 9 and 6, - wherein said electromechanical unit (118, 218) is further arranged for adjusting said stroke length control mechanism (108, 208) for selectively allowing said second stroke length (L2).
13. The drill pipe string conveyed ball valve tool (10, 20) according to claim 9 or 11,
- wherein said mandrel fluid port (115, 215, 315) is unaligned with the piston rod's (104, 204, 304) fluid port (116, 216, 316) when said piston rod (104, 204, 304) is in the second piston stroke length (L2).
14. The drill pipe string conveyed ball valve tool (10) according to any of the preceding claims 9 - 13,
- wherein said auxiliary ball valve element (106, 206) is arranged distally / below said main ball valve element (107, 207).
15. The drill pipe string conveyed ball valve tool (10, 20) according to any of the preceding claims,
- wherein said main ball valve (107, 207) is arranged above /proximally relative to said piston rod fluid port (116, 216).
16. A method for actuating a tool component (111, 211, 311),
characterized in that the method comprises
- providing a ball valve tool (10, 20, 30) of any of claims 1 - 15
- assembling said ball valve tool (10, 20, 30) on a drill pipe string,
- said main piston (103, 203, 303) and said piston rod (104, 204, 304) being at said initial stroke length (L0) with said auxiliary ball valve element (106, 206, 306) fully open,
- running said ball valve tool (10, 20, 30) into a well to a desired depth for operating said tool component (111, 211, 311) on a first casing of said well,
- using an electromechanical unit (118, 218, 318) adjusting a stroke length control mechanism (108, 208, 308) for selectively allowing a first stroke length (L1),
- increasing pressure and / or flow in said drill pipe string to stroke said main piston (103, 203, 303) with said piston rod (104, 204, 304) to said first stroke length (L1) to turn said auxiliary ball valve element's (106, 206, 306) restricted transverse bore (109, 209, 309) into the axial flow path of said central bore (105, 205, 305), and
- allowing pressure in said drill pipe string to actuate said tool actuator piston (113, 213, 313) thus actuating said tool component (111, 211, 311).
17. The method of claim 16,
- after running said ball valve tool (10, 20, 30) into said well to a desired depth in said first casing with said auxiliary ball valve element (106, 206) fully open, circulating in cement into said casing below said ball valve tool (10, 20, 30).
18 The method of claim 16 or 17 and claim 9,
- while having said auxiliary ball valve (206) with said restriction (209) activated,
- said tool actuator piston (213) actuating said knife assembly (211) to extend said knives (212) out to said surrounding casing,
- rotating said drill pipe string and cutting out through said casing,
- releasing the pressure in said drill pipe string to return said tool actuator piston (213) and retracting said knives (212),
- releasing the pressure in said drill pipe string to return said main piston (203) and said piston rod (204) to the initial stroke length (L0) while deactivating said auxiliary ball valve (206) to fully open.
19. The method of any of claims 16 to 18,
- while having said auxiliary ball valve (106) with said restriction (109) activated,
- sliding said piston (213) axially to actuate said packer assembly (111) and radially extending the packer element (112) to seal off the tool annulus (5) surrounding the tool (10), - pressure integrity testing the tool annulus (5) in said casing (6).
20. The method of any of claims 16 to 19, setting a spear tool in said cut-off section and pulling via said drill pipe string to test whether said cut-off section is free, and pulling said cut off section out of hole.
21. The method of claim 20,
- said spear tool being said spear tool (30),
- while having said auxiliary ball valve (306) with said restriction (309) activated,
- sliding said piston (313) axially to actuate said slips assembly (311) and radially extending the spear elements (312) to engage and hold said casing (6).
22. The method of claims 20 and claim 11,
- providing a drill pipe conveyed pressure-activated anchor (40) and pressure-actuated jack tool (50) in combination with said spear tool (30), said packer tool (10) and said cutter tool (20),
- after having cut said casing (3) and set said spear tool (30) in said cut-off section of said inner casing (3),
- closing said main ball valve (107) in said packer tool (10),
- increasing pressure in said drill pipe string to set said anchor (40) in a second casing (4) above said cut-off section of said inner casing (3),
- increasing pressure in said drill pipe string further to jack said spear tool (30) up in the direction of said anchor (40), thus forcefully releasing said cut-off section of said inner casing (3),
- releasing pressure in said drill pipe string sufficient to release said anchor (40) from said second casing (4) while maintaining hold on said cut-off section of said inner casing (3), - pulling the entire work string with said jack tool (50), anchor (40), spear tool (30) with said cut-off section of casing (3) out of hole.
NO20210278A 2021-03-02 2021-03-02 Ball valve tool NO346525B1 (en)

Priority Applications (3)

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NO20210278A NO346525B1 (en) 2021-03-02 2021-03-02 Ball valve tool
PCT/NO2022/050059 WO2022186702A1 (en) 2021-03-02 2022-03-02 Drill pipe string conveyed ball valve tool
GB2202917.7A GB2604454B (en) 2021-03-02 2022-03-02 Drill pipe string conveyed ball valve tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Citations (3)

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Publication number Priority date Publication date Assignee Title
US3971438A (en) * 1975-03-03 1976-07-27 Baker Oil Tools, Inc. Wireline safety valve with split ball
GB2544136A (en) * 2015-11-06 2017-05-10 Cutting & Wear Resistant Dev Ltd Circulation subassembly
NO20191033A1 (en) * 2019-08-27 2021-03-01 Archer Oiltools As Casing cutter tool and method for operating the casing cutter - pressure actuated piston sleeve actuating ball valve

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Publication number Priority date Publication date Assignee Title
US4331315A (en) * 1978-11-24 1982-05-25 Daniel Industries, Inc. Actuatable safety valve for wells and flowlines
US4576196A (en) * 1983-09-26 1986-03-18 Baker Oil Tools, Inc. Unloading injection control valve
GB2536441A (en) * 2015-03-17 2016-09-21 Helix Drilling Tools Ltd A downhole tool and actuation element
US11313202B2 (en) * 2016-09-23 2022-04-26 Halliburton Energy Services, Inc. Systems and methods for controlling fluid flow in a wellbore using a switchable downhole crossover tool
NO346248B1 (en) * 2019-08-27 2022-05-09 Archer Oiltools As Casing cutter tool and method for operating the casing cutter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971438A (en) * 1975-03-03 1976-07-27 Baker Oil Tools, Inc. Wireline safety valve with split ball
GB2544136A (en) * 2015-11-06 2017-05-10 Cutting & Wear Resistant Dev Ltd Circulation subassembly
NO20191033A1 (en) * 2019-08-27 2021-03-01 Archer Oiltools As Casing cutter tool and method for operating the casing cutter - pressure actuated piston sleeve actuating ball valve

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NO20210278A1 (en) 2022-09-05
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WO2022186702A1 (en) 2022-09-09

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