NL2018742B1 - Well recovery assembly for recovering a well and method for well recovery - Google Patents

Well recovery assembly for recovering a well and method for well recovery Download PDF

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Publication number
NL2018742B1
NL2018742B1 NL2018742A NL2018742A NL2018742B1 NL 2018742 B1 NL2018742 B1 NL 2018742B1 NL 2018742 A NL2018742 A NL 2018742A NL 2018742 A NL2018742 A NL 2018742A NL 2018742 B1 NL2018742 B1 NL 2018742B1
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NL
Netherlands
Prior art keywords
whipstock
assembly
pipe
conductor pipe
reopening
Prior art date
Application number
NL2018742A
Other languages
Dutch (nl)
Inventor
Nicolaas Rudolf Antonius Kampman Roelof
Original Assignee
Nicolaas Rudolf Antonius Kampman Roelof
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 Nicolaas Rudolf Antonius Kampman Roelof filed Critical Nicolaas Rudolf Antonius Kampman Roelof
Priority to NL2018742A priority Critical patent/NL2018742B1/en
Application granted granted Critical
Publication of NL2018742B1 publication Critical patent/NL2018742B1/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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes
    • E21B7/061—Deflecting the direction of boreholes the tool shaft advancing relative to a guide, e.g. a curved tube or a whipstock
    • 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
    • E21B15/00—Supports for the drilling machine, e.g. derricks or masts
    • E21B15/02—Supports for the drilling machine, e.g. derricks or masts specially adapted for underwater drilling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing

Abstract

Well recovery assembly for recovering a well, comprising a whipstock adapter having a first end that is connectable to an end portion of a conductor pipe having a flow channel. The whipstock adapter further comprises a stab-in portion near a second end of the whipstock adapter and an adapter flow channel extending from the first end to the second end, wherein the adapter flow channel is configured to be connected to the flow channel of the conductor pipe. The assembly also comprises a whipstock comprising a first end that is releasably connected to the end portion of the conductor pipe, a deflection portion end that is configured for, during use and after disconnecting the conductor pipe from the whipstock, deflecting at least the end portion of the conductor pipe and a receiving opening that extends substantially coaxially with a longitudinal whipstock axis through the whipstock towards a second end, wherein the receiving opening is configured for receiving the stab-in portion of the whipstock adapter. In use of the assembly, the adapter flow channel and the conductor pipe flow channel are in fluid connection with each other to define a fluid path. The invention also relates to a drilling installation and a method for well recovery.

Description

© 2018742
Octrooicentrum Nederland (21) Aanvraagnummer: 2018742 © Aanvraag ingediend: 19 april 2017 © Bl OCTROOI (51) Int. CL:
E21B 7/06 (2018.01) E21B 33/02 (2018.01) E21B
15/02 (2018.01)
(4^ Aanvraag ingeschreven: © Octrooihouder(s):
29 oktober 2018 Roelof Nicolaas Rudolf Antonius Kampman
te Julianadorp.
© Aanvraag gepubliceerd:
© Uitvinder(s):
© Octrooi verleend: Roelof Nicolaas Rudolf Antonius Kampman
29 oktober 2018 te Julianadorp.
© Octrooischrift uitgegeven:
24 januari 2019 © Gemachtigde:
ir. P.J. Hylarides c.s. te Den Haag.
© WELL RECOVERY ASSEMBLY FOR RECOVERING A WELL AND METHOD FOR WELL RECOVERY
Ξ) Well recovery assembly for recovering a well, comprising a whipstock adapter having a first end that is connectable to an end portion of a conductor pipe having a flow channel. The whipstock adapter further comprises a stab-in portion near a second end of the whipstock adapter and an adapter flow channel extending from the first end to the second end, wherein the adapter flow channel is configured to be connected to the flow channel of the conductor pipe. The assembly also comprises a whipstock comprising a first end that is releasably connected to the end portion of the conductor pipe, a deflection portion end that is configured for, during use and after disconnecting the conductor pipe from the whipstock, deflecting at least the end portion of the conductor pipe and a receiving opening that extends substantially coaxially with a longitudinal whipstock axis through the whipstock towards a second end, wherein the receiving opening is configured for receiving the stab-in portion of the whipstock adapter. In use of the assembly, the adapter flow channel and the conductor pipe flow channel are in fluid connection with each other to define a fluid path. The invention also relates to a drilling installation and a method for well recovery.
NL Bl 2018742
Dit octrooi is verleend ongeacht het bijgevoegde resultaat van het onderzoek naar de stand van de techniek en schriftelijke opinie. Het octrooischrift komt overeen met de oorspronkelijk ingediende stukken.
WELL RECOVERY ASSEMBLY FOR RECOVERING A WELL AND METHOD FOR WELL
RECOVERY
The invention relates to a well recovery assembly for recovering a well and a method for well recovery.
In drilling operations from a structure, such as an oil platform, a number of well slots may be used to place conductor pipes. In time, some of these conductor pipes may be damaged or get clogged during operation, rendering the existing conductor useless. Rather than abandoning the well slot, a well recovery operation may be attempted, in which the slot is provided with a new conductor pipe that proceeds along a (slightly) different route. The well recovery is performed using a well recovery assembly including a whipstock, which is known from practice.
During the recovery, when the old conductor pipe is cut at or preferably below the mudline of the seabed. In a subsequent step, the whipstock is lowered in or on the stub of the old conductor pipe. The whipstock is configured to deflect the new conductor pipe to continue along a different path.
A disadvantage of the existing well recovery assemblies however is that the funnel-shaped cavity above the stub of the old conductor pipe and below the mudline gets clogged, for example by sand, gravel and/or other substances, before the whipstock can be placed. As a result, cleaning of the cavity is required. Only after cleaning of the cavity by removing sand, gravel and/or other substances, for example using drill pipe washing, a re-entry using a whipstock can be performed. Such a cleaning operation is complex and time-consuming and can take days or even up to a week.
Thus, an assembly for recovering a well that allows a more efficient re-entry is required.
The assembly according to the invention obviates or at least reduces the abovementioned problems.
To that end, the invention provides an assembly for recovering a well, the assembly comprising:
a whipstock adapter having a first end that is connectable to an end portion of a conductor pipe having a flow channel, the whipstock adapter further comprising: a stab-in portion near a second end of the whipstock adapter;
an adapter flow channel extending from the first end to the second end, wherein the adapter flow channel is configured to be connected to the flow channel of the conductor pipe;
a whipstock comprising:
a first end that is releasably connected to the end portion of the conductor pipe;
a deflection portion that is configured for, during use and after disconnecting the conductor pipe from the whipstock, deflecting at least the end portion of the conductor pipe;
a receiving opening that extends substantially coaxially with a longitudinal whipstock axis through the whipstock towards a second end, wherein the receiving opening is configured for receiving the stab-in portion of the whipstock adapter;
wherein, in use of the assembly, the adapter flow channel and the conductor pipe flow channel are in fluid connection with each other to define a fluid path.
The well recovery assembly according to the invention provides a whipstock adapter in a configured fluid path to form between the conductor pipe that needs to be placed and the second end of the whipstock. During lowering of the assembly towards the stub of the old conductor pipe, a fluid, for example seawater, or a gas is pumped down along the fluid path through the conductor pipe and the whipstock adapter to remove sand and gravel from the cavity in which the stub of the old conductor pipe is located. The assembly according to the invention has the advantage that the cleaning operation prior to lowering and placing the well recovery assembly is obviated. Thus, the assembly according to the invention therewith combines the cleaning operation and placing of the well recovery assembly, leading to a significant reduction in costs and operation time.
Another advantage of the assembly according to the invention is that the amount of time and/or equipment used for the well recovery operation can be reduced. The lower amount of equipment is especially advantageous in view of the limited space that is available on drilling installations of other vessel that can be equipped with the appropriate equipment.
Various embodiments of the assembly according to the invention can be envisaged. The whipstock adapter can for example be connected to the end portion of the conductor pipe that is to be placed in various ways. In an embodiment, the whipstock adapter may for example be connected with the end portion of the conductor pipe by means of a screw connection. However, other suitable options may be used as well. Furthermore, in an embodiment, the connection between the whipstock adapter and the end portion of the conductor pipe may be provided with a sealing agent and/or sealing means to provide fluid-tight connection. Preferably, the sealing agent and/or sealing means are resistant to pressure, for example the pressure that is required for pumping a fluid and/or gas towards the second end of the whipstock to remove the substances in the cavity. More preferably, a pressure resistant sealing agent may be used.
Furthermore, the connection between the whipstock and the end portion of the conductor pipe may be provided using one of a variety of connecting means. In a preferred embodiment, the connection between the first end of the whipstock and the end portion of the conductor pipe is formed using a plurality of shear bolts.
The deflection portion of the whipstock may be provided near the first end of the whipstock and extend in a general downward direction towards the second end. The surface of the deflection portion preferably is a trough-formed surface that is configured to cooperate with the end portion of the conductor pipe to provide an easy deflection thereof. The trough-formed surface may have a 5 substantially rounded form or may be provided in a (rounded) V-shape to ascertain that the conductor pipe will follow a predetermined path.
Preferably, the receiving opening of the adapter extends downwards from the deflection surface and substantially coaxially with a longitudinal whipstock axis towards the second end. An upper part of the receiving opening may than be provided in the lower part of the trough-form, for 10 example on the edge of a V-shaped trough-form. Although generally the receiving opening extends substantially coaxially with a longitudinal whipstock axis, the invention also comprises embodiments in which the receiving opening extends in a downward direction under an angle with the longitudinal axis of the whipstock. It has been found that it is preferred that the receiving opening extends substantially coaxially with a longitudinal whipstock axis in a central portion of 15 the whipstock. Each embodiment may for example be used in case the placement of the assembly and the location of the stub are not perfectly matched and/or when the old conductor pipe that is present in the soil extends under an angle with a vertical plane.
In use of the assembly, a fluid path is formed within the assembly that extends from the end portion of the conductor pipe to the second end of the whipstock. The fluid path provides a fluid 20 connection between both ends of the assembly and can be extended, for example by adding additional sections of conductor pipe. This allows the conductor pipe and the assembly coupled therewith to be lowered to and below the mudline while simultaneously maintaining the fluid path.
The diameter of the fluid path may be constant or may vary over the length of the fluid path, depending on the configuration of conductor pipe, the connection between the conductor pipe and 25 the whipstock adapter and the (internal) diameter of the whipstock adapter over the length thereof. In an embodiment, the adapter flow channel may be provided with a constriction, preferably a constriction near the second end of the whipstock adapter, to increase the flow speed of the fluid and/or gas that is pumped through the fluid path before exiting the assembly. An increased flow speed increases the force that is used to clean the cavity in which the old conductor pipe stub is 30 located.
In an embodiment according to the invention, the well recovery assembly may comprise a conductor pipe that is to be placed into the well, the conductor pipe having a flow channel extending through the conductor pipe and an end portion thereof. Additionally or in combination therewith, the well recovery assembly may comprise a setting plate that is connected to the second 35 end of the whipstock and that is provided with a setting plate flow opening. Furthermore, in addition or in combination therewith, the well recovery assembly may comprise a spear extending front a first side that is connected to the setting plate towards a second, opposite side, the spear comprising a flow channel that extends from the setting plate flow opening towards a flow opening at the second end, wherein the conductor pipe flow channel, the adapter flow channel, the setting 5 plate flow opening and the spear flow channel are in fluid connection with each other to define a fluid path. This enables an effective cleaning operation while positioning/placing the assembly.
In a preferred embodiment according to the invention, the assembly comprises a setting plate and a spear, which are configured to more easily position the whipstock in the stub of the old conductor pipe. This prevents misalignment of the whipstock and/or movement of the whipstock relative to the stub of the old conductor pipe, hi addition, it secures the whipstock to the old conductor pipe, which prevents the whipstock from sliding away under pressure of the conductor pipe when it is released from the whipstock. Both the setting plate and the spear are provided with means for allowing fluid to be channelled. The setting plate may be provided with a flow opening, whereas the spear may be provided with a flow channel. In use of the assembly, the setting plate flow opening and the flow channels of the conductor pipe, the whipstock assembly and the spear are aligned with each other in order to provide a fluid path that fluidly connects the end portion of the conductor pipe flow channel and the flow opening of the spear for the transfer of fluid and/or gas.
Aligning the flow channels and/or flow openings of the different components may be performed in various manners. The setting plate and/or the spear may be provided with respectively a flow opening and a flow channel before connecting them to the whipstock. The alignment of the fluid path is than performed by aligning the flow channels and/or openings before securing the whipstock to the setting plate. Alternatively, the setting plate may be connected to the whipstock, for example by welding the plate to the whipstock, which is followed by manufacturing a flow opening the setting plate at the position of an outflow opening of the adapter flow channel. Manufacturing such an opening may be performed by means of cutting, grinding, burning or any other suitable means. Subsequently, the spear may be connected to the setting plate, for example by welding, wherein the flow channel of the spear and the flow opening in the setting plate are aligned. It is also possible to connect the spear and the setting plate and subsequently provide the flow channel in the spear.
In an alternative embodiment according to the invention, the assembly comprises a setting plate that is essentially cup-formed or cylindrical. The setting plate is connected to the second end of the whipstock with the cup-form facing away from the whipstock. The setting plate is configured to be placed over the stub of the old conductor pipe in order to fit the whipstock over the old conductor pipe. In this alternative embodiment, the setting plate is provided with a flow opening such that the conductor pipe flow channel, the adapter flow channel and the setting plate flow opening are in fluid connection with each other to define a fluid path that fluidly connects the end portion of the conductor pipe flow channel and the flow opening of the setting plate.
In an embodiment according to the invention, the setting plate and the spear are configured to cooperate for closing off the old conductor pipe. This improves efficiency and safety of the operation, since no lateral movement of the whipstock is possible if a snug fit is provided.
In an embodiment according to the invention, the stab-in portion of the whipstock adapter may be provided with one or more fluid seals to provide a fluid-tight seal between the receiving opening and the stab-in adaptor.
To provide a fluid-tight connection between the stab-in portion and the receiving opening, the stab-in portion and/or the receiving opening may be provided with one or more seals. The seals may be configured to provide a fluid-tight connection, but may additionally or exclusively also be provided to increase the connection strength between the stab-in portion and the receiving opening, thus acting as a connecting means. Alternatively, the one or more seals may be provided as a sealing agent that cooperates with the material used in the stab-in portion and/or in the receiving opening to form a sealing and/or securing connecting. Preferably, the seals may be configured to be pressure resistant and/or have a high resistance to tearing under shear stress.
In an embodiment according to the invention, the stab-in portion may have an increasing diameter towards the second end, such that, near the second end, the stab-in portion has a substantially conical form.
The stab-in portion may, integrally or additionally, be provided with a part that has an increasing diameter towards the second end, thus forming a substantially cone-like form. This embodiment is most advantageous in situations in which the spear and setting plate are placed concentrically. Aligning the spear flow channel and the setting plate flow opening with the adapter 25 flow channel becomes relatively easy due to the large diameter of the adapter flow channel near the setting plate. Preferably, the inner diameter of the adapter flow channel is substantially equal to the inner diameter of the whipstock, thus having a relatively large surface for positioning the setting plate flow opening without misaligning the flow path. In this embodiment, the setting plate is preferably placed substantially perpendicular to both the whipstock and the old conductor pipe stub. The spear is placed substantially perpendicular to the setting plate, wherein the position of the connection between the spear and the setting plate is determined based on the configuration of the old conductor pipe stub. This is made possible by having an inner diameter of the adapter flow channel that is substantially equal to the inner diameter of the whipstock. This allows the spear to be positioned virtually anywhere on the surface area of the setting plate.
In an embodiment according to the invention, the whipstock or the stab-in portion of the whipstock adapter may be provided with a retrieval element for recovering the well recovery assembly from the well, wherein the retrieval element may be positioned in the receiving opening and may be provided with connection elements, such as a thread, for connecting the retrieval element and the well recovery assembly with a retrieval device for recovering the well assembly.
This embodiment has the advantage that the assembly can be retrieved when the well recovery is abandoned during operation and/or in case a malfunction occurs. Preferably, the retrieval element is a fishing neck, which is known from practice and is common in conventional whipstocks. In the assembly according to the invention the retrieval element, i.e. fishing neck, may 10 be provided in either the whipstock and/or in the whipstock adapter.
In an embodiment of the invention in which the assembly is provided with a retrieval element, the retrieval element may be positioned upwardly from the increasing diameter of the stab-in portion when viewed from the deflection portion towards the second end.
The retrieval element, which preferably is a fishing neck, may advantageously be provided 15 between the end of the receiving opening near the deflection portion and a point of the stab-in portion at which the diameter thereof increases. This allows a standard retrieval device or tool that is known from practice to be used in conjuction with the assembly according to the invention.
In an embodiment according to the invention, the first end of the whipstock adapter may have an outer diameter that is slightly smaller than an inner diameter of the conductor pipe, 20 wherein the inner and outer diameter are chosen such that the first end is slidably insertable in the end portion of the conductor pipe.
This embodiment is preferred for providing the connection between the end portion of the conductor pipe and the first end of the whipstock adapter, because it provides a solid, relatively rigid connection. In addition, achieving the connection is relatively easy and time-efficient only 25 requiring sliding the connecting ends together.
Additionally, by providing such a slidable connection, the whipstock adapter may, during disconnecting of the conductor pipe and the whipstock, be configured to slide into the end portion of the conductor pipe.
In an embodiment according to the invention, in which a sliding connection is provided between the end portion of the conductor pipe and the first end of the whipstock adapter, a portion of the whipstock adapter directly adjacent to the first end may have an outer diameter that is larger than the inner diameter of the end portion of the conductor pipe, and preferably may be substantially equal to the outer diameter of the conductor pipe, such that the transition between the first end and the adjacent portion may form an edge that is configured to be contiguous with the end portion of the conductor pipe for forming a substantially continuous surface.
This embodiment has the advantage that it provides an essentially pre-made connector between the end portion of the conductor pipe and the first end of the whipstock adapter. The whipstock adapter, after sliding the first end into the end portion of the conductor pipe, forms a substantially even surface with the end portion, therewith decreasing the sliding resistance when the assembly is lowered into the well.
In an embodiment according to the invention, the first end of the whipstock adapter may be connected to the end portion of the conductor pipe using a connecting agent, preferably a glue, and more preferably an environmentally friendly glue. The connecting agent may also be a connecting and sealing agent, for example a fluid sealing and/or a glue that provides a sealing engagement.
This embodiment not only ensures a solid and substantially immovable connection between the first end of the whipstock adapter and the end portion of the conductor pipe, but simultaneously forms a fluid tight seal for the fluid path.
In an embodiment according to the invention, the whipstock adapter may be made of a material having a high strength and a low plastic deformation coefficient.
The whipstock adapter can be manufactured from a variety of different materials and/or combinations of materials. During use, the w'hipstock adapter is required to withstand the forces exerted on the assembly without breaking or rupturing, while simultaneously maintaining an open fluid path. This means the material requires a relatively high strength and a low plastic deformation coefficient. Moreover, during operation, the conductor pipe needs to be released from the whipstock as well as from the whipstock adapter in order to be deviated along an alternative trajectory compared to the old conductor pipe. This means that the whipstock adapter must be releasably connected to the conductor pipe. In a preferred alternative of this embodiment, the whipstock adapter is manufactured of material that breaks and/or shatters under influence of a high force impact, such as a blow from a suitable hammering instrument. This may for example comprise a piling hammer and/or may be a diesel, steam or hydraulic hammer that is usable to shatter and/or break the whipstock adapter. Furthermore, the material of the whipstock adapter is preferably also drillable, allowing a drill to bypass the (remains of) the whipstock adapter after it has been released from the conductor pipe.
Alternatively or in combination therewith, the adapter drillability of the whipstock adapter may be achieved by providing the first end of the whipstock adapter with a tapered form. Such a tapered form allows the drilling bit to enact a force one the whipstock adapter that is directed towards the conductor pipe wall, therewith preventing the whipstock adapter from sliding during drilling out.
In an embodiment according to the invention, the whipstock adaptor may be made of a composite material and/or a polyurethane.
The use of a composite material and/or polyurethane provides the whipstock adapter with the characteristics that are desired for the operation, while also having a relatively low cost. These characteristics include the abovementioned high strength and low plastic deformation coefficient as well as the accompanying advantages that are mentioned. In an elaboration of the embodiment according to the invention, the material may comprise a recycled and/or environmentally friendly material. It should be noted that this is a measure that is provided in addition to the fact that drill cuttings are pumped upward to the surface and separately disposed to prevent environmental pollution.
In an embodiment according to the invention, the connection between the whipstock and the conductor pipe may be formed using shear bolts.
The invention also relates to a drilling installation provided with an assembly according to the invention.
The drilling installation according to the invention provides the same effects and advantages as the well recovery assembly as described above. The term drilling installation should be read as an installation for performing a well recovery operation. Such a drilling installation may comprise a drilling rig or a floating barge provided with a crane configured for lowering and piling the conductor pipe into place. It may also comprise other vessels having installations configured for well recovery operations.
Due to the fact that a well recovery operation using the assembly according to the invention can be performed without an additional cleaning operation, a drilling installation is more efficient than a conventional drilling installation. Furthermore, in a drilling installation according to the invention more space is available for other equipment due to the fact that the cleaning installation is obviated.
The invention further also relates to a method for well recovery, the method comprising: providing a well-recovery assembly according to the invention;
connecting the first end of the whipstock adapter with the end portion of the conductor pipe;
connecting the whipstock with the conductor pipe;
sliding the stab-in portion into the receiving opening of the whipstock; removing sand and/or other substances from the mudline by pumping fluid, for example seawater, while simultaneously lowering the assembly towards an old conductor pipe;
installing the conductor pipe.
The method according to the invention provides the same effects and advantages as the well recovery assembly and the drilling installation according to the invention as described above. The advantage of the method according to the invention is that a well recovery operation can be performed in an efficient manner within a relatively short time, therewith resulting in a significant cost reduction. This is mainly due to the fact that a cleaning operation of the cavity in which the stub of the old conductor pipe is positioned, is no longer necessary. Instead, the method comprises cleaning of the cavity and placing of the assembly in a single operation.
In a preferred embodiment of the method according to the invention, the first end of the whipstock adapter is provided with a slidable connector that is configured to mate with the end portion of the conductor pipe. In the embodiment, the method comprises inserting the first end of the whipstock adapter in the end portion of the conductor pipe, such that the adjacent portion of the whipstock adapter is contiguous with the end portion of the conductor pipe. Preferably, the first end of the whipstock adapter and/or an inner diameter of the end portion of the conductor pipe is provided with a glue, for example a two-component glue, after which the whipstock adapter and the conductor pipe are connected.
The method also comprises the steps of placing or positioning the whipstock over the conductor pipe and sliding the stab-in portion into the receiving opening of the whipstock. Preferably, the stab-in portion and/or the receiving opening are provided with a sliding agent, such as grease, preferably environmentally friendly grease, in advance of the sliding operation. Also, both steps are preferably performed simultaneously, therewith reducing the construction time and, thus, the costs.
The assembly is configured for removing sand and/or other substances from the mudline and the cavity during lowering of the assembly towards the old conductor pipe. This is preferably done by pumping a fluid, such as seawater, through the fluid path. The pressure of the fluid that is expelled from the lower or underside of the assembly pushes aside any substances to clear the cavity. After placing the whipstock on or in the old conductor pipe, the conductor pipe that is to be placed, is installed.
In an embodiment of the method according to the invention, the method comprises a step of connecting assembly parts including connecting the whipstock to the conductor pipe and connecting the setting plate and the whipstock, and optionally connecting the spear and the setting plate.
The step of connecting the setting plate and the whipstock may be provided on-shore or may be performed off-shore at or on the drilling installation. Using the method of the invention has the advantage that the setting plate can be connected with the whipstock, for example by welding, onshore. Furthermore, it is even possible to apply the flow opening in the setting plate on-shore using suitable means therefore. This may for example include cutting and/or grinding of the flow opening in the setting plate. Depending on the type of setting plate used, the embodiment according to the method may also include connecting the setting plate and the spear.
In an embodiment of the method according to the invention, the method may further comprise placing the assembly in the old conductor pipe by inserting the spear into said old conductor pipe and releasing the conductor pipe from the whipstock and/or the whipstock adapter, wherein the conductor pipe is deflected by the deflection portion, preferably in combination with the whipstock adapter, wherein releasing the conductor pipe from the whipstock and/or whipstock adapter optionally comprises breaking the whipstock adapter and/or the connection between the first end of the whipstock and the end portion of the conduc tor pipe.
By providing a whipstock adapter, the conductor pipe may, after the release thereof from the whipstock adapter and the whipstock, be deflected by a combination of the whipstock deflection portion in combination with the (remains of) the whipstock adapter. This deflection may be enhanced by providing a portion of the whipstock adapter with an inwardly slanted surface that cooperates with the deflection portion of the whipstock to deflect the conductor pipe in the desired direction. Releasing the conductor pipe from the whipstock adapter and/or the whipstock can for example be performed using a hammer instrument.
In an embodiment of the method according to the invention, the method further may comprise all or one of the steps of providing a sliding agent, such as a grease, preferably an environmentally friendly grease, on the stab-in portion and/or checking whether the fluid seals and/or the fluid sealing area are installed correctly, preferably by visually checking the correct installation of the fluid seals. Preferably, the embodiment according to the method may comprise providing the opening in the setting plate based on the old conductor pipe configuration and/or orientation.
Further advantages, features and details of the invention are elucidated on the basis of preferred embodiments thereof, wherein reference is made to the accompanying drawings, in which:
figure la shows a schematic view of a drilling installation with a well recovery assembly according to the invention;
figure lb shows a schematic view of the well recovery assembly from Figure la; figure 2a shows a perspective view of a well recovery assembly according to the invention;
figure 2b shows a schematic cross-sectional view of an example of a well recovery assembly according to the invention;
figure 2c shows a schematic cross-sectional view of a second example of a well recovery assembly according to the invention;
figures 3a-3d schematically show examples of method steps according to embodiments of the invention;
figures 4a-4b schematically show another example of method steps according to embodiments of the invention;
- figure 5 shows a schematic overview of an example of the method according to the invention incorporating several embodiments.
In an illustrated example of the invention (as shown in Figure la), drilling station 30 is provided with well recovery assembly 2 that is connected to a lower end of a series of conductor pipes 4 that are connected to form a single conductor pipe 4. In a more detailed view of well recovery assembly 2 (as shown in Figure lb), it is shown that conductor pipe 4 is suspended from the rig in a downward direction. End portion 4b of conductor pipe 4 is provided with well recovery assembly 2 that comprises whipstock adapter 6, whipstock 10 with wall 8, setting plate 18 and spear 20. The assembly, during lowering towards the mudline of the seabed is positioned roughly above conductor pipe stub 3 of the old conductor pipe. A flow of seawater is pumped in flow direction 4a of conductor pipe 4 along flow path 16 (figure lb) towards the lower end of assembly 2, where it pushes away the substances like sand that have filled the cavity after the old conductor pipe has been cut.
In an example of well recovery assembly 2 incorporating various embodiments according to the invention (as seen in Figures 2a, 2b, 2c), assembly 2 comprises conductor pipe 4 having end portion 4b and flow path 4a. End portion 4b is connected to first end 10a of whipstock 10 using shear bolts 26. First end 6a of whipstock adapter 6 is slid into end portion 4b of conductor pipe 4 up to a shoulder that is formed by adjacent portion 6d that is adjacent to first end 6a. Adjacent portion 6d has an outer diameter that is equal to the outer diameter of end portion 4b of conductor pipe 4 (figures 2a, 2b). In a different example (shown in figure 2c) adjacent portion 6d has an outer diameter that is equal to the outer diameter of first end 6a of whipstock adapter 6. The connection between first end 6a and end portion 4b is made by a connection agent, such as glue.
Whipstock adapter 6 is provided with flow channel 6c that forms a continuous flow path with flow channel 4a of conductor pipe 4 (figures 2a, 2b, 2c). Stab-in portion 6b of whipstock adapter 6 is slid into receiving opening 14 of whipstock 10. A lower part of whipstock adapter 6 has a conical shape and, in the example (shown in figure 2b), is provided as a separate part that is connected to the lower end of whipstock adapter 6.
In the example of figure 2c, whipstock adapter 6 is also provided with a lower part that has a conical shape having an increasing diameter towards the second end of whipstock 8. The lower part is an integral part of whipstock adapter 6. In this example whipstock adapter 6 is also provided with a fishing neck 7, which has a thread or roughened/preformed inner surface 7a that is configured for cooperation with a retrieval device.
A sealing engagement between the lower end of stab-in portion 6b, the lower part and receiving opening 14 is provided by means of sealing rings 24. Sealing rings 24 can additionally be provided between stab-in portion 6b and receiving opening 14. The lower part of stab-in portion 6b, is provided as a separate part, is connected by means of welding to setting plate 18 which is provided with flow opening 18a. Spear 20 extends from first end 20a to second end 20b and has correspondingly extending flow channel 20c, To provide continuous flow path 16 that extends from conductor pipe flow channel 4a of conductor pipe 4 to flow opening 22 of spear 20, flow channel 20c of spear 20 and flow opening 18a of setting plate 18 are aligned with flow channel 6c of whipstock adapter 6. In this example, the conical shape allows setting plate opening 18a and the corresponding placement of spear 20 to be positioned virtually anywhere on the surface of setting plate 18. After aligning, spear 20 is connected to setting plate 18 by means of welding.
In a first example of the method according to the invention (as shown in Figures 3a-3d), it is shown that assembly 2 according to the invention is used to clear out the cavity over old conductor pipe stub 3 by pushing or washing away the substances that need to be removed. The first examples therewith clearly show the integration of the steps of cleaning and placing well recovery assembly 2 that in the conventional practice had to be performed consecutively. Further steps will be illustrated with further examples below.
In a second and third example of the method according to the invention (shown in Figures 4a, 4b respectively), the method steps of placing the assembly in the old conductor pipe by inserting the spear into said old conductor pipe (Figure 4a) and releasing the conductor pipe from the whipstock are shown (Figure 4b). The second example shows the method step of placing assembly 2 in old conductor pipe stub 3, wherein spear 20 is inserted in old conductor pipe stub 3 up to setting plate 18. Spear 20 provides a snug fit to the old conductor pipe stub 20. In the third example, the method step of releasing and deflec ting conductor pipe 4 is shown. By the exertion of a force, in this case a shock using a hammer instrument, shear bolts 26 break and whipstock adapter 6 shatters near receiving opening 14 in deflection portion 12. Conductor pipe 4, having first end 6a still enclosed in end portion 4b is deflected along deflection portion 12 of whipstock 10 to an alternati ve trajectory compared to the old conductor pipe. First end 6a of whipstock adapter 6 can subsequently be drilled out of end portion 4b of conductor pipe 4.
In a fourth example 100 of the method according to the invention shown in Figure 5, the first step 102 comprises providing well recovery assembly according to invention and subsequently sliding 104 first end 4a of the whipstock adapter 10 in end portion 4b of conductor pipe 4. In this example, the second step of sliding 104 is preceded bv the optional step 104a of applying a connecting agent, in this case glue, more specifically two component glue, to the parts that are to be connected. The third subsequent step in this example is applying 120 a sliding agent, in this case environmentally friendly grease to stab-in portion 6b and subsequently sliding 106 whipstock 10 over whipstock adapter 6 by sliding 108 stab-in portion 6b into receiving opening 14. This step is optionally followed by the step of checking 122 whether fluid seals 24 are installed correctly. In the example, this step is followed by connecting 114a first end 10a of whipstock 10 to end portion 4b of conductor pipe 4, connecting 114b setting plate 18 to whipstock 10, and connecting 114c spear 20 to setting plate 18. Optionally, when setting plate 18 was not yet provided with setting plate opening 18a, the method comprises the step of providing 124 setting plate opening 18a in setting plate 18. In a subsequent step, the method comprises the step of removing 110 sand and/or other substances from the mudline by pumping fluid, for example seawater, while simultaneously lowering assembly 2 towards old conductor pipe stub 3. This step is followed by the steps of placing 116 assembly 2 in old conductor pipe stub 3 by inserting spear 20 into said old conductor pipe stub 3 and releasing 118 conductor pipe 4 from whipstock 10 using a hammer instrument to break whipstock adapter 6 and shearing bolts 26, wherein deflecting conductor pipe 4 is performed by deflection portion 12.
Optionally, the method comprises installing 112 conductor pipe 4.
The present invention is by no means limited to the above described preferred embodiments thereof. The rights sought are defined by the following claims within the scope of which many modifications can be envisaged.
CLAÜSBS'
1, Well recovery assembly for recovering a. well, comprising:
a whipstock adapter having a first end that is connectable to an end portion of a conductor pipe having a flow channel, the whipstock adapter further comprising:
a stab~iu portion near a second end of the whipstock adapter;
an adapter flow channel extending from the first end to the second end, wherein tire adapter flow channel is configured to be connected to the flow channel of the conductor pipe;
a whipstock comprising:
I ¢) - a first end that is releasably connected to the end portion of the conductor pipe;
a deflection portion end that is configured tor, during use and after disconnecting the conductor pipe from the whipstock, deflecting at least the end portion of the conductor pipe;
a receiving opening that extends substantially coaxially with a longitudinal whipstock axis through the whipstock towasris a second end, wherein the receiving opening is configured for receiving the stab-in portion of the whipstock adaptet.
wherein, in use of the assembly, da. Japen flow channel and the conductor pipe flow channel 20 are in fluid connection with each other to define a fluid path.
2, Well recovery assembly according to claim 1, comprising:
a conductor pipe that is to be placed into the well, the conductor pipe having a conductor pipe flow chare·/ >wn\ J,eg *h,««p.b the uom n»j .>\w „ad .re en I 25 portion thereof; and/or a setting plate that is connected to the second end of the whipstock, and that is
0'' sXd '' dh a ;b!n„ pl. u- flow i-penreg and a spear extending from a first side that is connected to the setting plate towards a second, opposite side, the spear comprising a flow channel that extends from the setting plate flow opening towards a flow opening at the second end; and/or wherein the conductor pipe flow channel, the adapter flow channel, the- setting plate flow opening and the spear flow channel, are in fluid connection with each other to define a fluid path.
3, Well recovery assembly according to one of the preceding clauses, wherein the siab-m portion of the whipstock adapter is provided with one or more fluid seals to provide a ftaiddight seal between the receiving opening and the stab-ip portion,
4. Well '.recovery assembly according to any one o f the preceding clauses, whèreiu the stabin portion has an increasing diameter towards the second end, such that, near the second end, the stab-in portion has a substantially conical form,
5. Well recovery assembly according to any one of the preceding clauses, wherein whipstock or the stab-in portion of the whipstock adapter is provided with a retrieval element for .recovering the well recovery assembly from the well, wherein the retrieval clement Is positioned in;the.receiving- opening and is provided with connection elements, such as a thread, for connecting the retrieval element and the well recovery assembly with, a retrieval device for recovering the well assembly.
6. Well recovery assembly according, to clause 5, when dependent on clause 4.. wherein the retrieval element is positioned upwardly from the increasing diameter of the stab-in. portion, when wwwd ffo'.' (be Jcfkct’ott pott'on ,O'' no4 doe vw ,.'J ol fee sshq >‘w\
7. Well .recovery assembly according to any one of the preceding clauses, wherein the first end of the whipstock adapter has an outer diameter that is slightly smaller than an inner diameter of the conductor pipe, wherein the inner and outer diameter are chosen such that the first end Is slidably mseriabie in the end portion of the conductor pipe,.
8, Well recovery assembly according to clause 6, wherein a portion of the whipstock adapter directly adjacent to the first end has an outer diameter that is larger than the inner diameter of the end portion of the conductor pipe, and preferably is substantially equal to the outer diameter of the conductor pipe, such that the transition between the first end and the adjacent portion forms an edge or shoulder that is configured to be contiguous with the end portion of the conductor pipe for forming a substantially continuous surface.
9. Well recovery assembly according, to any one of the preceding clauses, wherein the first end of the whipstock adapter Is connected to the end portion of the conductor pipe using a connecting agent, preferably a glue, and more preferably an environmentally friendly glue.
10. Well recovery assembly according to any one of the preceding clauses, wherein the whipstock adapter is provided with a break Boe that extends along a connection line between the stab-in portion and the deflection portion, of the whipstock over.at least part of a etewference of the stab-in. portion,
11, Well recovery assembly according to any one of the preceding clauses, wherein foe whipstock adapter is made of a material having a high strength and a low plastic deformation court a sent.
12. Well recovery assembly according-to. any one of the preceding clauses, wherei n the.
whipstock adaptor is made of a composite material-and/or a polyurethane,
13. Well recovery assembly according to any one of the preceding olauses, wherein, the connection between the whipstock and the conductor pipe is formed using shear bolts.
:H lb iPvyt iiN.t’ i.mon provided with a well recovery .assembly according to any one of the preceding cl auses, *> Meth-nt M aell te>.ortT). the mv-bod c> mooring:
- providing a well recovery assembly according to any one of the clauses 1-12;
connecting the first end <4 die whipstock adapter with the end portion of the conductor pipe;
connecting the whipstock with the conductor pipe; sliding the stab-in portion into the receiving opsuing of the whipstock;
- removing sand and/or other substances from the mudline by pumping fluid, for example seawater, while lowering the assembly towards an old conductor pipe; and installing the conductor pipe.
Id. Method according to clause .15, wherein the method comprises a step of connecting assembly parts, .including;
connecting the setting plate and the whipstock; and optionally connecting the spear and the setting plate.
17. Method according to clause 15 or 16, further comprising;
placing the assembly in the old conductor pipe by inserting the spear into said old conductor pipe; and/or uk up dn 'tk to> p o mm e.' ά η \ < J ' u p ) h|\i wherein the conductor pipe is deflected by the deflection portion, preferably in combination with the whipstock adapter, wherein relem me the conductor pipe from the whipstock and/or whipstock adapter optionally comprises breaking the whipstock, adapter and/or the connection between the first end of the whipstock and: the end portion of the conductor pipe.
I8, Method according to any one of the clauses -15-17, further comprising:
providing a sliding agent, such as a grease, preferably an environmentally friendly grease, on the srab-ln portion; and/or checking whether the fluid seals are installed. crarecdy, preferably by visually cheeking the carrect installation of the fluid seals; and/or
- providing the opening in the setting plate basedon theold conductor pipe configuration and/or orientation.

Claims (18)

CONCLUSIESCONCLUSIONS 1. Bronheropeningssamenstel voor het heropenen van een bron, omvattende:A resource reopening assembly for reopening a resource, comprising: een whipstock-koppeldeel met een eerste uiteinde dat verbindbaar is met een einddeel van een leidingpijp dat is voorzien van een slromingskanaal, waarbij het whipstock-koppeldeel verder omvat:a whipstock coupling part with a first end that can be connected to an end part of a conduit pipe provided with a slimming channel, the whipstock coupling part further comprising: een inzetdeel nabij een tweede uiteinde van het whipstock-koppeldeel;an insert member near a second end of the whipstock coupling member; een koppeldeel-stromingskanaal dat zich van een eerste uiteinde naar een tweede uiteinde uitstrekt, waarbij het koppeldeel-stromingskanaal is ingericht om te verbinden met hel slromingskanaal van de leidingpijp;a coupling part flow channel extending from a first end to a second end, the coupling part flow channel being adapted to connect to the slurry channel of the conduit pipe; een whipstock omvattende:a whipstock comprising: ~ een eerste uiteinde dat losmaakbaar verbonden is met het einddeel van de stromingskanaal van de leidingpijp;~ a first end releasably connected to the end portion of the conduit pipe flow channel; ~ een deflectiedeel dat is ingericht om, in gebruik van het samenstel en na het loskoppelen van de leidingpijp van de whipstock, ten minste het einddeel van de leidingpijp te deflecteren;~ a deflection part which is adapted to deflect, in use of the assembly and after disconnecting the pipe from the whipstock, at least the end part of the pipe; een ontvangopening die zich in hoofdzaak coaxiaal met een longitudinale whipstock-as door de whipstock naar een tweede uiteinde daarvan uitstrekt, waarbij de ontvangopening is ingericht voor het ontvangen van het inzetdeel van het whipstock-koppeldeel;a receiving aperture extending substantially coaxially with a longitudinal whipstock axis through the whipstock to a second end thereof, the receiving aperture being adapted to receive the insert of the whipstock coupling member; waarbij in gebruik van het samenstel, het koppeldeel-stromingskanaal en het leidingpijp-stromingskanaal in vloeistofverbinding met elkaar staan om een vloeistoftraject te vormen.wherein in use of the assembly, the coupling part flow channel and the conduit pipe flow channel are in fluid communication with each other to form a fluid path. 2. Bronheropeningssamenstel volgens conclusie 1, omvattende:2. Source reopening assembly according to claim 1, comprising: een leidingpijp om in de bron te plaatsen, waarbij de leidingpijp is voorzien van een leidingpijp-stromingskanaal dat zich door de leidingpijp en een einddeel daarvan uitstrekt; en/of een zettingsplaat die is verbonden met het tweede uiteinde van de whipstock, en die is voorzien van een zettingsplaatstroomopening; en/of een speer die zich uitstrekt van een eerste zijde die is verbonden aan de zettingsplaat naar een tweede, tegenoverliggende zijde, waarbij de speer een stromingskanaal omvat dat zich uitstrekt van de zettingsplaatstroomopening naar een uitstroomopening in het tweede uiteinde;a conduit pipe for placing in the well, the conduit pipe having a conduit pipe flow channel extending through the conduit pipe and an end portion thereof; and / or a settlement plate which is connected to the second end of the whipstock and which is provided with a settlement location opening; and / or a spear extending from a first side connected to the settlement plate to a second opposite side, wherein the spear comprises a flow channel extending from the settlement site opening to an outflow opening in the second end; waarbij het leidingpijp-stromingskanaal, het koppeldeel-stromingskanaal, de zettingsplaatstroomopening en het speer-stromingskanaal in vloeistofverbinding met elkaar staan om een vloeistoftraject te vormen.wherein the conduit pipe flow channel, the coupling part flow channel, the setting site flow opening and the spear flow channel are in fluid communication with each other to form a fluid path. 3. Bronheropeningssamenstel volgens één der voorgaande conclusies, waarbij het inzetdeel van het whipstock-koppeldeel is voorzien van één of meer vloeistofafdichtingen voor het verschaffen van een vloeistofdichte afdichting tussen de ontvangstopening en het inzetdeel.3. Source reopening assembly as claimed in any of the foregoing claims, wherein the insert part of the whipstock coupling part is provided with one or more liquid seals for providing a liquid-tight seal between the receiving opening and the insert part. 4. Bronheropeningssamenstel volgens één der voorgaande conclusies, waarbij het inzetdeel in de richting van het tweede uiteinde een toenemende diameter heeft, zodat, nabij het tweede uiteinde, het inzetdeel een in hoofdzaak conische vorm heeft.4. Source reopening assembly as claimed in any of the foregoing claims, wherein the insert has an increasing diameter in the direction of the second end, so that, near the second end, the insert has a substantially conical shape. 5. Bronheropeningssamenstel volgens één der voorgaande conclusies, waarbij de whipstock en/of het inzetdeel van het whipstock-koppeldeel is voorzien van een terughaalelement voor het uit de bron terughalen van het bronheropeningssamenstel, waarbij het terughaalelement in de ontvangopening is gepositioneerd en is voorzien van verbindingselementen, zoals schroefdraad, voor het verbinden van het terughaalelement en het bronheropeningssamenstel met een terughaalinrichting voor het terughalen van het bronheropeningssamenstel.5. Source reopening assembly as claimed in any of the foregoing claims, wherein the whipstock and / or the insert of the whipstock coupling part is provided with a retrieval element for retrieving the source reopening assembly from the source, the retrieval element being positioned in the receiving opening and provided with connecting elements , such as thread, for connecting the retrieval element and the source reopening assembly to a retrieval device for retrieving the source reopening assembly. 6. Bronheropeningssamenstel volgens conclusie 5, wanneer afhankelijk van conclusie 4, waarbij het terughaalelement, vanuit het deflectiedeel in de richting van het tweede uiteinde van de whipstock gezien, opwaarts van de toenemende diameter van het inzetdeel is gepositioneerd.6. Source reopening assembly as claimed in claim 5, when dependent on claim 4, wherein the retrieval element, viewed from the deflection part in the direction of the second end of the whipstock, is positioned upwardly of the increasing diameter of the insert. 7. Bronheropeningssamenstel volgens één der voorgaande conclusies, waarbij het eerste uiteinde van het whipstock-koppeldeel een buitendiameter heeft die iets smaller is dan de binnendiameter van de leidingpijp, waarbij de binnendiameter en de buitendiameter zo gekozen worden dat het eerste uiteinde schuifbaar inzetbaar is in het einddeel van de leidingpijp.7. Source reopening assembly as claimed in any of the foregoing claims, wherein the first end of the whipstock coupling part has an outer diameter that is slightly narrower than the inner diameter of the pipe, the inner diameter and the outer diameter being selected such that the first end can be slidably inserted in the end part of the pipe. 8. Bronheropeningssamenstel volgens conclusie 7, waarbij een deel van het whipstockkoppeldeel direct aanliggend aan het eerste uiteinde een buitendiameter heeft die groter is dan de binnendiameter van het einddeel van de leidingpijp, en bij voorkeur in hoofdzaak gelijk is aan de buitendiameter van het einddeel van de leidingpijp, zodat de overgang tussen het eerste uiteinde en het aanliggende deel een rand of schouder vormt die is ingericht om aanliggend te zijn met het einddeel van de leidingpijp voor het vormen van een in hoofdzaak continu oppervlak.8. Source reopening assembly according to claim 7, wherein a part of the whipstock coupling part immediately adjacent the first end has an outer diameter that is larger than the inner diameter of the end part of the pipe, and is preferably substantially equal to the outer diameter of the end part of the pipe. conduit pipe, so that the transition between the first end and the abutting portion forms an edge or shoulder adapted to abut the end portion of the conduit pipe to form a substantially continuous surface. 9. Bronheropeningssamenstel volgens één der voorgaande conclusies, waarbij het eerste uiteinde van het whipstock-koppeldeel is verbonden aan het einddeel van de leidingpijp met gebruik van een verbindingsmiddel, bij voorkeur een lijm, en met meer voorkeur een milieuvriendelijke lijm.9. Source reopening assembly as claimed in any of the foregoing claims, wherein the first end of the whipstock coupling part is connected to the end part of the pipe with the use of a connecting means, preferably an adhesive, and more preferably an environmentally friendly adhesive. 10. Bronheropeningssamenstel volgens één der voorgaande conclusies, waarbij het whipstock-koppeldeel is voorzien van een breeklijn die zich langs een verbindingslijn tussen het inzetdeel en het deflectiedeel van de whipstock over ten minste een gedeelte van de omtrek van het inzetdeel uitslrekt.10. Source reopening assembly as claimed in any of the foregoing claims, wherein the whipstock coupling part is provided with a breaking line which extends along at least a part of the circumference of the insert along a connecting line between the insert and the deflection part of the whipstock. 11. Bronheropeningssamenstel volgens één der voorgaande conclusies, waarbij het whipstock-koppeldeel is vervaardigd uit materiaal met een hoge sterkte en een lage plastische deformatiecoëfficiënt.A source reopening assembly according to any one of the preceding claims, wherein the whipstock coupling member is made of high strength and low plastic deformation coefficient material. 12. Bronheropeningssamenstel volgens één der voorgaande conclusies, waarbij het whipstock-koppeldeel is vervaardigd uit een composietmateriaal en/of een polyurethaan.12. Source reopening assembly as claimed in any of the foregoing claims, wherein the whipstock coupling part is manufactured from a composite material and / or a polyurethane. 13. Bronheropeningssamenstel volgens één der voorgaande conclusies, waarbij de verbinding tussen de whipstock en het einddeel van de leidingpijp is gevormd door het gebruik van scheurbouten.13. Source reopening assembly as claimed in any of the foregoing claims, wherein the connection between the whipstock and the end part of the pipe is formed by the use of tear bolts. 14. Boorinstallatie voorzien van een bronheropeningssamenstel volgens één der voorgaande conclusies.A drilling rig provided with a source reopening assembly according to any one of the preceding claims. 15. Werkwijze voor bronheropening, omvattende:A method for resource reopening, comprising: hel verschaffen van een bronheropeningssamenstel volgens één der conclusies 1 13;providing a source reopening assembly according to any of claims 13; het verbinden van het eerste uiteinde van het whipstock-koppeldeel met het einddeel van de leidingpijp;connecting the first end of the whipstock coupling part to the end part of the conduit pipe; het verbinden van de whipstock met de leidingpijp;connecting the whipstock with the pipe; het in de on tv angstopening van de whipstock schuiven van het inzetdeel;sliding the insert into the on tv fear opening of the whipstock; het verwijderen van zand en/of andere substanties van de bodemlijn door het verpompen van vloeistof, bijvoorbeeld zeewater, bij het gelijktijdig laten zakken van het samenstel in de richting van een oude pijpleiding; en het installeren van de leidingpijp.removing sand and / or other substances from the bottom line by pumping liquid, for example seawater, while simultaneously lowering the assembly in the direction of an old pipeline; and installing the conduit pipe. 16. Werkwijze volgens conclusie 15, waarbij de werkwijze een stap van het verbinden van samenstelonderdelen omvat, bevattende:The method of claim 15, wherein the method comprises a step of connecting assembly parts, comprising: het verbinden van de zettingsplaat en de whipstock; en optioneel het verbinden van de speer en de zettingsplaat.connecting the setting plate and the whipstock; and optionally connecting the spear and the settlement plate. 17. Werkwijze volgens conclusie 15 of 16, verder omvattende:The method of claim 15 or 16, further comprising: het plaatsen van het samenstel in de oude pijpleiding door het in de oude pijpleiding inbrengen van de speer; en/of het loskoppelen van de leidingpijp van de whipstock en/of het whipstockkoppeldeel, waarbij de leidingpijp wordt gedeflecteerd door het deflectiedeel, bij voorkeur in combinatie met het whipstock-koppeldeel, waarbij het loskoppelen van de leidingpijp van de whipstock en/of het whipstock-koppeldeel optioneel het breken van het whipstock-koppeldeel en/of de verbinding tussen het eerste uiteinde van de whipstock en het einddeel van de leidingpijp omvat.placing the assembly in the old pipeline by inserting the spear into the old pipeline; and / or disconnecting the pipe from the whipstock and / or the whipstock coupling part, wherein the pipe is deflected by the deflection part, preferably in combination with the whipstock coupling part, wherein disconnecting the pipe from the whipstock and / or the whipstock coupling part optionally comprises breaking the whipstock coupling part and / or the connection between the first end of the whipstock and the end part of the pipe pipe. 18. Werkwijze volgens één der conclusies 15-17, verder omvattende:The method of any one of claims 15-17, further comprising: hel verschaffen van een smeermiddel, zoals een smeer, bij voorkeur een milieuvriendelijk smeer, op het inzetdeel; en/of het controleren of de vloeistofafdichtingen correct geïnstalleerd zijn, bij voorkeur door het visueel inspecteren van de correcte installatie van de vloeistofafdichtingen; en/of het verschaffen van de stroomopening in de zettingsplaat gebaseerd op de configuratie en/of oriëntatie van de oude pijpleiding.providing a lubricant, such as a lubricant, preferably an environmentally friendly lubricant, on the insert; and / or checking whether the fluid seals are installed correctly, preferably by visually inspecting the correct installation of the fluid seals; and / or providing the flow opening in the settlement plate based on the configuration and / or orientation of the old pipeline. 1/8 üg 81/8 or 8 CMCM CMCM 4/4 / C-4 CsiC-4 Csi 5/5 / 112112
NL2018742A 2017-04-19 2017-04-19 Well recovery assembly for recovering a well and method for well recovery NL2018742B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060260809A1 (en) * 2005-05-18 2006-11-23 Crain Jack A Method and apparatus for replacing drive pipe
WO2007063324A1 (en) * 2005-12-03 2007-06-07 Frank's International, Inc. Method and apparatus for installing deflecting conductor pipe
US20120152566A1 (en) * 2010-12-20 2012-06-21 Baker Hughes Incorporated Extended reach whipstock and methods of use
US20130008664A1 (en) * 2011-07-07 2013-01-10 Graves Kyle S Above mudline whipstock for marine platform drilling operations
GB2533143A (en) * 2014-12-11 2016-06-15 Claxton Eng Services Ltd Adjustable whipstock

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060260809A1 (en) * 2005-05-18 2006-11-23 Crain Jack A Method and apparatus for replacing drive pipe
WO2007063324A1 (en) * 2005-12-03 2007-06-07 Frank's International, Inc. Method and apparatus for installing deflecting conductor pipe
US20120152566A1 (en) * 2010-12-20 2012-06-21 Baker Hughes Incorporated Extended reach whipstock and methods of use
US20130008664A1 (en) * 2011-07-07 2013-01-10 Graves Kyle S Above mudline whipstock for marine platform drilling operations
GB2533143A (en) * 2014-12-11 2016-06-15 Claxton Eng Services Ltd Adjustable whipstock

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