Abstract: A technique facilitates patching of a tubing (42), e.g. casing (36), in a downhole environment (32). The technique employs a patching system comprising a plurality of expansion rings (48). The expansion rings (48) are moved downhole to a patch zone (38) along the tubing (34). Once in a desired position at the patch zone, the expansion rings (48) are expanded into engagement with an inner surface of the tubing. For example, the expansion rings may comprise seal elements (52) and/or anchor elements which are expanded into engagement with the inside surface. The patching system further comprises a patch (68) which may have a tubular shape. The patch is radially expanded in a manner which maintains a sealing engagement with the plurality of expansion rings (48) to create a sealed patch across a desired region in the patch zone.

Abstract: A technique facilitates patching of a tubing (42), e.g. casing (36), in a downhole environment (32). The technique employs a patching system comprising a plurality of expansion rings (48). The expansion rings (48) are moved downhole to a patch zone (38) along the tubing (34). Once in a desired position at the patch zone, the expansion rings (48) are expanded into engagement with an inner surface of the tubing. For example, the expansion rings may comprise seal elements (52) and/or anchor elements which are expanded into engagement with the inside surface. The patching system further comprises a patch (68) which may have a tubular shape. The patch is radially expanded in a manner which maintains a sealing engagement with the plurality of expansion rings (48) to create a sealed patch across a desired region in the patch zone.

Abstract: A device for lining or obturating a wellbore or a pipe. The device includes a tubular radially-expandable lining and at least one ring seal carried by the lining. The seal includes at least one first part formed by a filament or a braid mounted spirally about the external surface of the lining.

Abstract: A radially expandable tubular metallic element includes on its external face at least a series of annular sealing lips made of elastically deformable material. These lips are spaced in pairs. The transversal cross section of each lip has an end face and two lateral walls, wherein the lips are made of a non-metallic material and are inclined in the same direction, relative to said external face, that is, each of the lateral walls of each lip forms a non-zero angle (?; ?) relative to a radial plane of said element.

Abstract: An isolation of part of a well, which includes a pipe provided, along its external face, with a first external sleeve, wherein the opposite ends are connected directly or indirectly to said external face of the pipe. The pipe, first external sleeve and its ends together delimit an annular space, the wall of said pipe exhibiting at least one opening which allows it to communicate with said space, this sleeve being likely to expand and to be applied tightly against the well over an intermediate part of its length. The device also includes on the one hand, a second internal sleeve, which extends between said pipe and the first sleeve, its ends being also connected directly or indirectly to the external face of said pipe and, on the other hand, at least one communication passage between the exterior of the first sleeve and said space.

Abstract: The present invention relates especially to a radially expandable tubular metallic element (2) which comprises on its external face (211) at least a series of annular sealing lips (5) made of elastically deformable material, these lips being spaced in pairs, the transversal cross section of each lip (5) having an end face (51) and two lateral walls (52, 53), characterized in that said lips (5) are in a non-metallic material and are inclined in the same direction, relative to said external face (211), that is, each of the lateral walls (52, 53) of each lip (5) forms a non-zero angle (?; ?) relative to a radial plane (PR) of said element.

Abstract: A pipe to be placed within a well for producing a fluid of interest includes an outer face onto which is crimped a tubular metal element. The inner face of the tubular element exhibits an annular groove in which a metal anchoring ring or a pair of juxtaposed anchoring rings is engaged. Each anchoring ring consists of a ring split transversely at least partially, is provided on its inner face with projecting anchoring members, and exhibits, in cross-section, a base equipped with the projecting members and at least one flank forming an acute angle with the base. The annular groove exhibits a profile that is substantially complementary to that of the ring(s). The depth of the groove is less than the thickness of the ring or of the rings. The projecting members are at least partially embedded into the pipe after crimping of the metal element onto the pipe.

Abstract: A device for lining or obturating a wellbore or a pipe. The device includes a tubular radially-expandable lining and at least one ring seal carried by the lining. The seal includes at least one first part formed by a filament or a braid mounted spirally about the external surface of the lining.

Abstract: An isolation of part of a well, which includes a pipe provided, along its external face, with a first external sleeve, wherein the opposite ends are connected directly or indirectly to said external face of the pipe. The pipe, first external sleeve and its ends together delimit an annular space, the wall of said pipe exhibiting at least one opening which allows it to communicate with said space, this sleeve being likely to expand and to be applied tightly against the well over an intermediate part of its length. The device also includes on the one hand, a second internal sleeve, which extends between said pipe and the first sleeve, its ends being also connected directly or indirectly to the external face of said pipe and, on the other hand, at least one communication passage between the exterior of the first sleeve and said space.

Abstract: The invention relates to isolation of part of a well, which comprises pipe provided, along its external face, with a first external sleeve, wherein the opposite ends are connected directly or indirectly to said external face of the pipe. The pipe, first external sleeve and its ends together delimit an annular space, the wall of said pipe exhibiting at least one opening which allows it to communicate with said space, this sleeve being likely to expand and to be applied tightly against the well over an intermediate part of its length. The device also comprises on the one hand, a second internal sleeve, which extends between said pipe and the first sleeve, its ends being also connected directly or indirectly to the external face of said pipe and, on the other hand, at least one communication passage between the exterior of the first sleeve and said space.

Abstract: The present invention relates to a device for controlling and isolating a tool for isolating areas in a well which comprises: a main inlet conduit which communicates with the inside of said casing, and which is obturated by a first element able to form a barrier to a fluid circulating in said casing, while yielding beyond a first pressure, this conduit communicating, with two auxiliary conduits, the ends of which join up in order to form an outlet conduit, one of these auxiliary conduits, forming a first chamber, while, in the other one, a second element is provided forming a barrier, moveable between a first position and a second position wherein said first position, said second element forming a barrier and the wall of said second auxiliary conduit make between them a sealed annular chamber in which prevails a so-called <<isolation>> pressure, this chamber not communicating with the outside, notably with the well.

Abstract: A support device for tubular equipment, such as a liner inside a well, and methods for using the support device, the support device including two elements attached to each other. The two elements are: a) a cylindrical sleeve, made of ductile metal and having an external diameter slightly less than an inner diameter of the well or of a casing inserted into the well; and b) a set of tabs made of hard metal, which are spaced apart from each other and integral with the cylindrical sleeve. The tabs extend downwards from the cylindrical sleeve and an outer wall of the tabs is fitted with a series of notched formations, such as teeth, whereas an inner wall of the tabs has a conical form, the apex of which is turned down.

Abstract: The present invention relates to a device for laying an expansible lining in a conduit. The device may include a patch having an initial diameter less than that of the conduit, and the patch may be configured to deform by radial expansion beyond an elastic limit to an expanded diameter such that it may contact a wall of the conduit. The device may also include an expander tool axially displaceable inside the patch, and the expander tool may be configured to cause the radial expansion of the patch to an expanded diameter. The device may also include a checking member mounted in proximity to the expander tool. A section of the checking member may be calibrated so that the checking member and the expander tool are capable of passing freely inside the patch when the patch is properly expanded, and the checking member and the expander tool are unable to pass inside the patch when the patch is improperly expanded.

Abstract: The present invention relates in particular to a lining process for a line (C) using hydroforming of a liner (3), according to which: a) a tool (1) is inserted axially into said liner (3) whereon are mounted two radially expandable plugs (2); said tool (1) is positioned inside the liner (3) so that the plugs (2) are located facing its end portions (33); the plugs (2) are slightly expanded so as to bind the tool (1) to said liner (3); the assembly consisting of the tool (1) and the liner (3) is inserted axially into the well or the line (C); fluid under pressure is sent into the liner (3), between the two plugs (2) so as to cause radial expansion of only the central portion of the liner (3); eventually, said plugs (2) are again expanded with sufficient pressure for them to cause radial expansion of the two end portion (33) of the liner (3), applying them against the inner wall (Cp) of the line (C); said plugs (2) are retracted and the tool (1) is withdrawn from the line (C), characterized by the fact that retr

Abstract: The present invention relates especially to a hydraulic fracturing equipment of the rock of a well (A), characterised in that it comprises, on the one hand: a conduit (1) provided along its external face with at least one pair of expandable metallic tubular sleeves (2) fixedly, connected to the conduit (1), this conduit having opposite each sleeve (2) at least one opening (10) known as “first opening” to put the internal space of the conduit (1) in communication with the space delimited by the latter and each sleeve (2), and opposite the space separating the two sleeves (2) of a same pair at least one other opening (3), known as “second opening” for putting the internal space of the conduit (1) in communication with the interior of the well (A); a tubular element (4) of diameter provided to allow it to be engaged in said conduit (1), such that there is a free annular space between them; the wall of this tubular element (4) comprising at least one first through-hole (42); the wall being also provided externall

Abstract: The present invention relates especially to a hydraulic fracturing device which comprises:—a tubular conduit (1);—and, against its external face, a cylindrical sleeve (2) whereof the opposite ends (20) are connected together and hermetically to this external face;—the wall of said tubular conduit (1) comprising at least one opening (10) to have it communicate with the interior of the sleeve (2). This device is remarkable in that said sleeve (2) comprises at least one mechanical weakening zone (21) which is peripheral, sinuous and with closed contour, that is, its opposite ends rejoin, this mechanical weakening zone being capable of breaking under the effect of predetermined pressure (10) known as “burst pressure” applied to the interior of the latter to form in its wall a sinuous opening (3).

Abstract: The present invention relates especially to a radially expandable tubular metallic element (2) which comprises on its external face (211) at least a series of annular sealing lips (5) made of elastically deformable material, these lips being spaced in pairs, the transversal cross section of each lip (5) having an end face (51) and two lateral walls (52, 53), characterised in that said lips (5) are in a non-metallic material and are inclined in the same direction, relative to said external face (211), that is, each of the lateral walls (52, 53) of each lip (5) forms a non-zero angle (?; ?) relative to a radial plane (PR) of said element.

Abstract: Method for repairing a hanger (D) of a liner (B), for making a leak-tight connection, the liner (B) being placed inside and in the continuation of the casing (A) of a well, the method consisting in axially positioning a metal tubular blank (1) in the well, the blank having a solid wall radially deformable beyond its elastic limit and comprising an upper cylindrical portion (10) whose outer diameter is slightly smaller than the inner diameter of the casing (A), a lower portion (13) also cylindrical whose outer diameter is slightly smaller than the inner diameter of the liner (B), and an intermediate portion (11, 12) of diameter varying between these two diameters, and causing radial expansion of at least one of these two cylindrical portions (10, 13) beyond its elastic limit so that they are applied closely and firmly and in leak-tight manner against the inner face of the wall opposite the casing (A) or liner (B).

Abstract: The present invention notably concerns a method for repairing a hanger (D) of a liner (B), with a view to making it leak-tight, this liner (B) being placed inside and in the continuation of the casing (A) of a well.

Abstract: A pipe designed to be placed within a well for producing a fluid of interest, a pipe onto the outer face whereof is crimped a tubular metal element, wherein: the inner face of the tubular element exhibits an annular groove wherein is engaged a metal anchoring ring or a pair of anchoring rings set back-to-back; each anchoring ring consists of a ring split transversely at least partially, is provided on its inner face with projecting anchoring members, and exhibits, in cross-section, a base equipped with the projecting members and at least one flank forming an acute angle with the base; the annular groove exhibits a profile that is substantially complementary to that of the ring or of the pair of rings; the depth of the groove being less than the thickness of the ring or of the rings; such that the projecting members are at least partially embedded into the pipe after crimping of the metal element onto the pipe.