Abstract: An insulated tubular assembly includes jointed insulated tubing segments, all with inner and outer tubes concentrically disposed about in order to define a vacuum annulus in between and closed at both ends by annular bridges. Insulated tubing segment are provided with either male or female threads to threadably engage and form a joint directly with each other or through a coupling jointed to adjacent insulated tubing segments. An insulating sleeve held around such joint includes a first tubular shell adapted to cover at least part of one insulated tubular segment and a second tubular shell overlapping either internally or externally part of the first tubular shell, such that the second tubular shell extends axially about the threaded joint from one annular bridge to the adjacent one, with high tolerances on lengths of the insulated tubing segment extension extending beyond their respective annular bridges.

Abstract: Disclosed is a tubing component for the oil and gas industry. The tubing component includes an outer tube and an inner tube within the outer tube, said tubes being so configured to create a space between each other over a specified length. Each end of the inner tube is secured to the internal surface of the outer tube by a frustoconical fillet weld so that said space is leak-tight. The inner tube has a first internal diameter ID along a first length starting from each end of said tube, and a second, smaller internal diameter ID? along a second length beyond the first length. The tubing component further includes a protective metallic layer extending at least over the fillet weld. Also disclosed is a method for producing this tubing component.

Abstract: Disclosed is a tubing component for the oil and gas industry. The tubing component includes an outer tube and an inner tube within the outer tube, said tubes being so configured to create a space between each other over a specified length. Each end of the inner tube is secured to the internal surface of the outer tube by a frustoconical fillet weld so that said space is leak-tight. The inner tube has a first internal diameter ID along a first length starting from each end of said tube, and a second, smaller internal diameter ID? along a second length beyond the first length. The tubing component further includes a protective metallic layer extending at least over the fillet weld. Also disclosed is a method for producing this tubing component.

Abstract: An insulated tubular assembly includes jointed insulated tubing segments, all with inner and outer tubes concentrically disposed about in order to define a vacuum annulus in between and closed at both ends by annular bridges. Insulated tubing segment are provided with either male or female threads to threadably engage and form a joint directly with each other or through a coupling jointed to adjacent insulated tubing segments. An insulating sleeve held around such joint includes a first tubular shell adapted to cover at least part of one insulated tubular segment and a second tubular shell overlapping either internally or externally part of the first tubular shell, such that the second tubular shell extends axially about the threaded joint from one annular bridge to the adjacent one, with high tolerances on lengths of the insulated tubing segment extension extending beyond their respective annular bridges.

Abstract: A device for determining the connection quality of threaded tubular components includes a case configured for mounting on an external surface portion of a threaded tubular component, at least one measuring device including a contact layer including a plurality of temperature sensors arranged to measure variables representative of temperatures at a plurality of locations E(i,j) of the external surface of the end of the tubular component.

Abstract: A device for determining the connection quality of threaded tubular components includes a case configured for mounting on an external surface portion of a threaded tubular component, at least one measuring device including a contact layer including a plurality of temperature sensors arranged to measure variables representative of temperatures at a plurality of locations E(i,j) of the external surface of the end of the tubular component.

Abstract: A threaded connection for drilling or working hydrocarbon wells includes first and second tubular components with an axis of revolution, each including respective male and female ends. At least one of the male or female ends finishes in a terminal surface including a first abutment surface that can come into interfering contact when the connection is made against a second abutment surface provided on a shoulder produced on an opposing tubular component male or female end. At least one of the first and second abutment surfaces is hollowed out by a groove, defining an exterior abutment zone and an interior abutment zone. In the connection made state, the exterior and interior abutment zones are not coplanar, such that contact pressure of the interior abutment zone exerted in a vicinity of the groove is greater than or equal to a minimum value for contact pressure exerted in the exterior abutment zone.

Abstract: A device and method are provided for mitigating annular pressure buildup in a wellbore casing annulus of an oil or gas well. The device includes a tubular member including an outer side, a chamber secured around the outer side, the chamber having at least one flexible portion for varying the internal volume of the chamber, at least one reservoir capable of supplying a gas, and a pressure compensator connecting the reservoir and the chamber. The reservoir is able to feed the chamber volume with the gas via the pressure compensator.

Abstract: A tubular component for a drill stem, for drilling a hole, the component including a first end section including a first threading, a second end section including a second threading, and a substantially tubular central section, a hole being provided in at least one of the first and second end sections, and a tensioner for a communications tube disposed in the hole, the tensioner operating by deformation of a regular section of the communications tube, the tensioner being disposed in a housing provided in at least the section, at a distance from the ends of the communications tube, the housing intersecting with the hole.

Abstract: Tubular drill string component for drilling a hole with circulation of a drilling fluid around the component and in a direction going from a drill hole bottom to the surface. The component includes a first end including a female threading, a second end including a male threading, and a substantially tubular central zone. The component includes a communication tube arranged at least in the central zone and in contact with a bore of the central zone. A signal transmission cable is arranged in the tube. The communication tube includes a body formed from at least one metal strip arranged with an annular component. The body includes, in section along a plane passing through the axis of the tube, at least two axially elongated lengths, partially overlapping one another with an axial play selected to accommodate the maximum elastic deformation of the component under axial compressive and/or bending stress.

Abstract: A holding device insertable into a central bore of a drill string component, the central bore having a first diameter along at least part of a central portion of the drill string component and a second diameter proximate ends of the drill string component. The second diameter is lower than the first diameter. The holding device includes an elongated body forming at least partly a housing for a transmission line. The elongated body has transversal dimensions lower than the second diameter. A plurality of arcuate elements are arranged along the elongated body and distinct from and attached to the elongated body. The arcuate elements are elastically bendable so as to be able to move through the second diameter and have a largest chord greater than the first diameter in a free state so as to be able to expand within the first diameter once past the second diameter.

Abstract: A drill string element including a main pipe with connection ends and a protective mechanism for at least one wire. The protective mechanism extends within a central bore of the main pipe. The main pipe presents a first hole in one of the connection ends and a second hole in the other connection end, both holes communicating with the central bore. The protective mechanism includes a guide tube arranged for housing the wire, both ends of which being respectively disposed within the first hole and the second hole. A retaining mechanism is arranged in at least one of the first hole and the second hole for the respective end of the guide tube. The retaining mechanism is configured to prevent the respective end of the guide tube from moving relative to the one of the first hole and the second hole according to at least one longitudinal direction of the hole.

Abstract: The invention relates to a rotary drill stem component for exploration of a hydrocarbon well with drilling mud in movement around the component from a bottom of the well towards the surface. The drill can include a central tubular element having an axis of revolution and extended on either side respectively by a first and a second tool joint each respectively and successively including a first cylindrical portion connected to the tubular element, a second tapered portion, a third cylindrical portion with a radius greater than that of the tubular element. The drill can include a threaded end which can connect the component to another component, the component including a first shell provided with one or more functional zones, the first shell being mounted on one of the tool joints in a cohesive and removable manner.

Abstract: An assembly for producing a threaded connection for drilling or working hydrocarbon wells, the connection including first and second tubular components with an axis of revolution, each including respective male and female ends, at least one of the male or female ends finishing in a terminal surface including a first abutment surface that can come into interfering contact when connection is made against a second abutment surface provided on a shoulder produced on the other end, at least one of the first and second abutment surfaces being hollowed out by a groove, thereby defining an exterior abutment zone and an interior abutment zone. In the connection made state, the exterior and interior abutment zones are not coplanar, such that contact pressure of the interior abutment zone exerted in vicinity of the groove is greater than or equal to a minimum value for contact pressure exerted in the exterior abutment zone.

Abstract: A tubular component for a drill stem, for drilling a hole, the component including a first end section including a first threading, a second end section including a second threading, and a substantially tubular central section, a hole being provided in at least one of the first and second end sections, and a tensioner for a communications tube disposed in the hole, the tensioner operating by deformation of a regular section of the communications tube, the tensioner being disposed in a housing provided in at least the section, at a distance from the ends of the communications tube, the housing intersecting with the hole.

Abstract: A tubular component of a drill stem comprises a first end including a first threading, a second end including a second threading, and a substantially tubular central zone, the component further comprising a device for electrical connection with another component, mounted on at least one of the ends, and a cable for the transmission of signals between the first end and the second end, connected to the connecting device, the connecting device including at least one conductor provided with an electrically insulated link portion and an electrical contact portion; a dielectric to isolate the insulated link portion; and an annular sealing surface defining a protected zone, said electrical contact portion being disposed in the protected zone, the annular sealing surface being disposed at the surface of the insulated link portion.

Abstract: A rotary drill stem component for exploration of a hydrocarbon well with drilling mud in movement around the component from a bottom of the well towards the surface includes a central tubular element having an axis of revolution and extended on either side respectively by a first and a second tool joint each respectively and successively including a first cylindrical portion connected to the tubular element, a second tapered portion, a third cylindrical portion with a radius greater than that of the tubular element, and a threaded end which can connect the component to another component, the component including a first shell provided with one or more functional zones, the first shell being mounted on one of the tool joints in a cohesive and removable manner.

Abstract: A threaded tubular connection is provided. The connection includes a male tubular element provided with a male threaded portion and a female tubular element provided with a female threaded portion. The male threaded portion and the female threaded portion each include self-locking threads having a crest, a load flank, a stabbing flank and a root, a load flank lead of the self-locking threads being larger than a stabbing flank lead of the self-locking threads such that in a tightened position of the threaded tubular connection, the load flanks and the stabbing flanks of the male self-locking threads are engaged in tight contact with the load flanks and the stabbing flanks of the female self-locking threads. A transfer zone is axially disposed between the threaded portions and a free end of at least one of the tubular elements, while being axially spaced from the threaded portions.

Abstract: A tubular component of a drill stem comprises a first end including a first threading, a second end including a second threading, and a substantially tubular central zone, the component further comprising a device for electrical connection with another component, mounted on at least one of the ends, and a cable for the transmission of signals between the first end and the second end, connected to the connecting device, the connecting device including at least one conductor provided with an electrically insulated link portion and an electrical contact portion; a dielectric to isolate the insulated link portion; and an annular sealing surface defining a protected zone, said electrical contact portion being disposed in the protected zone, the annular sealing surface being disposed at the surface of the insulated link portion.

Abstract: A drill string element including a main pipe with connection ends and a protective mechanism for at least one wire. The protective mechanism extends within a central bore of the main pipe. The main pipe presents a first hole in one of the connection ends and a second hole in the other connection end, both holes communicating with the central bore. The protective mechanism includes a guide tube arranged for housing the wire, both ends of which being respectively disposed within the first hole and the second hole. A retaining mechanism is arranged in at least one of the first hole and the second hole for the respective end of the guide tube. The retaining mechanism is configured to prevent the respective end of the guide tube from moving relative to the one of the first hole and the second hole according to at least one longitudinal direction of the hole.