Abstract: The invention relates to a system and method for forming a pipe assembly. The method comprises: providing a composite pipe (112) having an inner diameter; providing a liner (110) having a first outer diameter which is smaller than the inner diameter of the composite pipe; placing the liner (110) in the composite pipe (112); and expanding the liner such that the liner has a second outer diameter which is greater than the first outer diameter, and an outer surface of the liner is in contact with an inner surface of the composite pipe, so as to form a pipe assembly including said composite pipe and said liner.

Abstract: A liner having an outer surface coated with a fluid absorbing coating is cladded to a tubing string by inserting the folded liner into the tubing string and then unfolding the liner against the tubing string. The liner may be a long single thin foil corrosion resistant liner coated with a sticky glue and a hygroscopic and/or other fluid absorbing coating to absorb fluid pockets trapped between the tubing and liner and inhibit corrosion and leakage of, the elongate tubing string.

Abstract: A liner having an outer surface coated with a fluid absorbing coating is cladded to a tubing string by inserting the folded liner into the tubing string and then unfolding the liner against the tubing string. The liner may be a long single thin foil corrosion resistant liner coated with a sticky glue and a hygroscopic and/or other fluid absorbing coating to absorb fluid pockets trapped between the tubing and liner and inhibit corrosion and leakage of, the elongate tubing string.

Abstract: A liner having an outer surface coated with a fluid absorbing coating is cladded to a tubing string by inserting the folded liner into the tubing string and then unfolding the liner against the tubing string. The liner may be a long single thin foil corrosion resistant liner coated with a sticky glue and a hygroscopic and/or other fluid absorbing coating to absorb fluid pockets trapped between the tubing and liner and inhibit corrosion and leakage of, the elongate tubing string.

Abstract: A velocity string for increasing fluid velocity in a production tubing (1) of a wet natural gas production well is configured downhole by:—inserting components (5) for configuring an annular liner (4) into the production tubing (1); and—clustering the components together in an annular space (9) adjacent to an inner surface of the production tubing (1) to configure the annular liner (4) in a cost effective manner without requiring killing the well with a high density liquid, expensive hoisting and/or other workover equipment and materials required to install conventional corrosion resistant steel velocity strings.

Abstract: The invention provides a system and method for lining a borehole. The system comprises: an expandable tubular element extending into the borehole, wherein an end portion of a wall of the expandable tubular element is bent radially outward and in axially reverse direction to define an expanded tubular section extending around an unexpanded tubular section; a pipe extending through the expanded tubular section; a connecting device for connecting the pipe to the unexpanded tubular section, the connecting device allowing the pipe to rotate relative to the unexpanded tubular section around a longitudinal axis of the pipe; a rotating device for rotating the pipe relative to the unexpanded tubular section around said longitudinal axis; and an actuator for moving the pipe in axial direction into the expanded tubular section to extend the expanded tubular section and thereby to form a liner of the borehole.

Abstract: A method is provided of creating a pipe connector including a first connector member and a second connector member, said connector members being adapted to be connected and disconnected multiple times, the method comprising: a) providing at least one of the connector members with a contact surface; b) depositing particles of a galling resistant metal on each said contact surface; c) at least partially melting the particles of the galling resistant metal by subjecting the particles to a quantity of heat; and d) allowing the molten galling resistant metal to solidify thereby forming a galling resistant metal coating which is metallurgically bonded to the contact surface. The heat may be provided in the form of radiant energy, using a laser beam.

Abstract: A metal substrate (71) is coated with an enamel or other coating material (72) by irradiating the coating material (72) and substrate (71) with electromagnetic radiation to melt an underlying surface of the metal substrate (71) before melting the coating material (72) to create, after cooling, a fusion bond between the solidified substrate and coating material, whereby the fusion bonded interface (73) has an intermeshing irregular tongue and groove like microstructure profile shown in FIG. 7. The electromagnetic radiation may be unfocussed, circulinear or focussed at a point located within the metal substrate (71) to first melt the substrate (71).

Abstract: A liner having an outer surface coated with a fluid absorbing coating is cladded to a tubing string by inserting the folded liner into the tubing string and then unfolding the liner against the tubing string. The liner may be a long single thin foil corrosion resistant liner coated with a sticky glue and a hygroscopic and/or other fluid absorbing coating to absorb fluid pockets trapped between the tubing and liner and inhibit corrosion and leakage of, the elongate tubing string.

Abstract: A method for transporting a hydrocarbon fluid, such as crude oil and/or natural gas, comprises: drilling a chain of double ended U-shaped boreholes into the earth crust, such that at least one pair of the boreholes has an adjacent pair of upper ends at or near the earth surface; lining each of the boreholes with an at least partly expanded impermeable liner comprising an expandable tubular, which is circumferentially expanded after insertion into the borehole; interconnecting each pair of adjacent upper ends of the chain of lined U-shaped boreholes by a connection conduit; and transporting the hydrocarbon fluid through a transportation pipeline with one or more W-shaped sections provided by the chain of lined U-shaped boreholes and the connection conduit.

Abstract: The invention provides a method and a system for sealing an annulus enclosing a tubular element in a wellbore. The method comprises the steps of introducing a first drilling fluid in the wellbore; drilling an open hole section of the wellbore using a drilling tool suspended at the end of a drill string; replacing the drilling fluid with a sealing fluid; extending the tubular element into the open hole section of the wellbore; and flushing part of the sealing fluid out of the wellbore, leaving an annulus between the tubular element and a wellbore wall filled with a layer of sealing fluid. The aforementioned steps may be repeated as required.

Abstract: The invention relates to a system and method for radially expanding a tubular element. The method comprises the steps of bending the tubular element radially outward and in axially reverse direction so as to form an expanded tubular section extending around an unexpanded tubular section, wherein bending occurs in a bending zone; increasing the length of the expanded tubular section by pushing the unexpanded tubular section in axial direction relative to the expanded tubular section; operating a drill string, which extends through the unexpanded tubular section and is provided with a drill bit at a downhole end thereof, to drill a borehole; and operating directional drilling means, which are coupled to the drill string, to deviate the borehole and direct the borehole along a predetermined path.

Abstract: The invention provides a method and system for radially expanding a tubular element below a previous tubular element.

Abstract: A method is provided of creating a pipe connector including a first connector member and a second connector member, said connector members being adapted to be connected and disconnected multiple times, the method comprising: a) providing at least one of the connector members with a contact surface; b) depositing particles of a galling resistant metal on each said contact surface; c) at least partially melting the particles of the galling resistant metal by subjecting the particles to a quantity of heat; and d) allowing the molten galling resistant metal to solidify thereby forming a galling resistant metal coating which is metallurgically bonded to the contact surface. The heat may be provided in the form of radiant energy, using a laser beam.

Abstract: The invention relates to a system and method for radially expanding a tubular element (8). The method comprises the steps of bending the tubular element (8) radially outward and in axially reverse direction so as to form an expanded tubular section (10) extending around an unexpanded tubular section (8) wherein bending occurs in a bending zone (14); and increasing the length of the expanded tubular section (10) by inducing the bending zone (14) to move in axial direction relative to the unexpanded tubular section (8). The method includes the further step of heating the bending zone. Several embodiments to enable heating are described.

Abstract: The invention discloses a method for surface enhancement of a pipe. The method includes the steps of: introducing the pipe in a wellbore; introducing cement slurry in the pipe from surface; introducing an expander cone in the pipe on top of the cement slurry, the expander cone having a largest outer diameter which is larger than the initial inner diameter of the pipe; pumping the expander cone towards the downhole end of the pipe, thereby moving the cement slurry to the downhole end and out of the downhole end and into an annulus enclosing the pipe, while and at the same time expanding the inner diameter of the pipe.

Abstract: The invention discloses a method and system for surface enhancement of a pipe. The method includes the steps of: introducing the pipe in a wellbore; and applying a ribbed pattern to the inner surface of the pipe. An expander cone, having a largest outer diameter which is larger than the initial inner diameter of the pipe and having an outer surface provided with a correspondingly ribbed pattern, is moved through the pipe to apply the pattern.

Abstract: The invention provides a system and method for lining a borehole. The system comprises: an expandable tubular element extending into the borehole, wherein an end portion of a wall of the expandable tubular element is bent radially outward and in axially reverse direction to define an expanded tubular section extending around an unexpanded tubular section; a pipe extending through the expanded tubular section; a connecting device for connecting the pipe to the unexpanded tubular section, the connecting device allowing the pipe to rotate relative to the unexpanded tubular section around a longitudinal axis of the pipe; a rotating device for rotating the pipe relative to the unexpanded tubular section around said longitudinal axis; and an actuator for moving the pipe in axial direction into the expanded tubular section to extend the expanded tubular section and thereby to form a liner of the borehole.

Abstract: A method for transporting a hydrocarbon fluid, such as crude oil and/or natural gas, comprises: drilling a chain of double ended U-shaped boreholes (1A, 1B) into the earth crust (12), such that at least one pair of the boreholes has an adjacent pair of upper ends at or near the earth surface; lining each of the boreholes with an at least partly expanded impermeable liner (14) comprising an expandable tubular, which is circumferentially expanded after insertion into the borehole; interconnecting each pair of adjacent upper ends of the chain of lined U-shaped boreholes by a connection conduit; and transporting the hydrocarbon fluid through a transportation pipeline with one or more W-shaped sections provided by the chain of lined U-shaped boreholes and the connection conduit. The method allows transportation of hydrocarbon fluids through elongate predominantly underground pipelines safely and with a minimum of environmental impact in arctic and other environmentally sensitive areas.

Abstract: The invention provides a method and a system for sealing an annulus enclosing a tubular element in a wellbore. The method comprises the steps of introducing a first drilling fluid in the wellbore; drilling an open hole section of the wellbore using a drilling tool suspended at the end of a drill string; replacing the drilling fluid with a sealing fluid; extending the tubular element into the open hole section of the wellbore; and flushing part of the sealing fluid out of the wellbore, leaving an annulus between the tubular element and a wellbore wall filled with a layer of sealing fluid. The aforementioned steps may be repeated as required.