Abstract:
A device and method for securing a sleeve (for sacrificial wear and/or electrical isolation) inside a conduit. In one embodiment, the retention device sits adjacent one end of the sleeve and comprises a ring having a protuberance or lip extending parallel to and against the end of the sleeve, thus pressing the end of the sleeve against the inner surface of the conduit. This has the advantage, in situations where fluids are flowing through the conduit, of reducing the risk of fluids moving behind the sleeve and collapsing it inwardly.
Abstract:
The present invention pertains to a process for lining a metal pipeline, said process comprising the following steps: (i) processing a thermoplastic polymer composition thereby providing a pipe liner having an outer diameter greater than the inner diameter of said metal pipeline, said thermoplastic polymer composition comprising, preferably consisting of: - at least one poly(aryl ether ketone) polymer [(PAEK) polymer], - at least one poly(phenylene sulfone) polymer [(PPSU) polymer], - optionally, at least one poly(arylene sulfide) [(PAS) polymer], and - optionally, at least one plasticizer; (ii) deforming said pipe liner thereby providing a deformed pipe liner having an outer diameter smaller than the inner diameter of said metal pipeline; (iii) inserting the deformed pipe liner in said metal pipeline; and (iv) expanding the deformed pipe liner to fit with the inner diameter of said metal pipeline. The present invention also relates to a pipeline system comprising at least two coaxial pipes, an outer metal pipeline and inner pipe comprising at least one layer comprising, preferably made of, said thermoplastic polymer composition.
Abstract:
A flexible pipe body for transporting production fluids containing one or more acidic components comprises a fluid-retaining inner polymeric barrier layer and at least one layer including a metallic component and arranged outside said barrier layer, wherein said polymeric barrier layer comprises a first, inner, sub-layer of a polymeric barrier material through which at least some of said acidic component may permeate and a second sub¬ layer [formed on said first sub-layer] including a material capable of reacting chemically with said acidic component to form reaction products which are non-corrosive to said metallic component.
Abstract:
The present invention relates to methods and apparatus utilizing distributed temperature sensing DTS, to monitor the temperature of a cured- in-place pipe liner to determine if proper curing temperatures and times are achieved. More particularly, an optical fiber (105) is placed between the pipe (101) and the liner (103) running the entire length of the liner. The optical fiber (105) is coupled to a DTS unit (107). During curing of the liner (103), the DTS unit (107) sends light pulses down the fiber from one end and detects the characteristics and time delay of light backscattered to the unit. The characteristics are indicative of the temperature of the optical fiber, while the delay is indicative of the round trip time of the light within the fiber, and thus the distance from the DTS unit from which any particular backscatter signal originated.
Abstract:
The invention refers to a process for the internal anticorrosive and anti-erosive protection of tubular steel material by using squired plastics and the resulting material can be used in the oil industry, for instance. This process, according to the invention, consists of isolating on the inside a piece of tubular steel material by squirted plastic tube that is centered and maintained at a certain distance from an internal wall of the tubular steel material, so that it creates an annular space obstructed at both ends, at one end, it is provided with a communicating window between the annular space and the exterior, so that the air can be evacuated from the annular space while at the other end a mineral binder is being injected through a hole made in the tubular steel material. The product, according to the invention is obtained by applying this process, that includes a steel tube (3), provided with a lateral opening (4) at one end, inside which an equally long tube (2) made of squirted plastics is introduced, two fixing buttons (1) are attached on the exterior surface of the tube (2) and they come in contact with the steel tube (3) internal wall, so that an annular space is created between the two tubes (3 and 2), at both ends, out of which one sealing system (7) has a circumference discontinuance allowing communication between the annular space and the exterior, between two successive steel tubes (3), provided with the squirted plastic tubes (2) either a self-sealing set (8) or a mounting nipple (11) can be attached.
Abstract:
A co-polymer composition (28) for coating porous structural material (21) includes a compatible surfactant resulting in a structural inter-bonding between the coating composition (28) and the structural material (21). The co-polymer composition (28) cured in a layer of unsupported foam has sufficient strength to be used as a substitute for comparably or larger sized layers of re-enforced concrete for conducting fluids while resisting compressive loads. A co-polymer foam composition (28) for coating structural material (28) cures to have an atmosphere-facing surface that is substantially impervious to corrosive substance penetration.
Abstract:
A concrete fluid structure deteriorated to the condition of removal of substance of the concrete by sulfuric acids and like corrosive material in contact therewith is restored by a substratum of epoxy foam, polyurethane foam, or a combination thereof having a relatively thin layer of polyvinyl chloride or polyethylene bonded to the outward facing surface of the foam and bonding the layer to the structure. A method for forming the substratum in the location of the deteriorated structure is described.
Abstract:
Method and device for fitting an inner tube in an existing pipeline, using air venting means, and also pipeline with inner tube of thermoplastics fitted in a stretched state therein. Lining of a pipeline (1) by placing therein an inner tube (2) of thermoplastic plastic and inflating it by medium pressure, thus forming an inner tube lining (2'), and subsequently cooling it under medium pressure. In order to prevent the inclusion of air between inside of pipeline (1) and outside of inner tube (2) to be inflated, longitudinal ribs of low height are provided on the outside (2a) of the inner tube (2). During the inflation the inner tube (2) also forms a sealing flange (20) extending over the end face (26) of the pipeline (1). A device for inflating the inner tube (2) comprises a coupling piece (17) which can be connected in a tension-resistant manner to the pipeline (1) and is provided with a connection (16) for introducing a pressure medium into inner tube (2).
Abstract:
A method for lining a tubular member with an elastomeric liner having an outside diameter which is initially greater than the inside diameter of the tubular member. A series of downsizing rollers (37, 57, 59, 61, 63) reduce the outside diameter of the liner a preselected amount. A series of shaping rollers (65, 84, 85) from the downsized liner into an ellipse, thereby allowing the downsized liner to be guided around bends and turns into the interior of the tubular member. After insertion, the liner is allowed to expand to substantially its original outside diameter to secure the liner within the tubular member.
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.