Abstract: A system is provided for tensioning and anchoring an end of an elongate element on a support. The system has tensioning means, a fastening member for fastening the tensioning member to the end of the elongate element and anchorage dogs for fastening the support to the end of the elongate element.

Abstract: A device is provided for positioning, activating and connecting the modules of a sub-sea oil production station. It comprises a frame 1 on which is mounted a central orientatable mast 20 having at its end a means 26 for connecting with a stringer train 28 and comprising a telescopic articulated gib 30 having a connector 32 at its end, said frame comprising underneath a connector 5 capable of locking a fixed mandrel 54 or that of a module to be positioned and comprising guide means 2 for lowering the device and means 3 for positioning it with respect to the module to be positioned, a multiconnector 6 for the electro-hydraulic connection with a multiconnector receptacle 54 carried by the module 70, electric and hydraulic umbilical ducts and cables 40 for the control and energy transmission to the multiconnector 6 and to the connector 32 and display means 33, 36.

Abstract: A device for connecting a collecting head input with the well head output by means of a movable connector connected to a looped duct, comprising a flexible connecting coupling formed by two horizontal loops surrounding the distribution block of the collecting head at different levels and connected by a vertical duct portion. The movable connector, for guiding same towards a receptacle-connector, rests on a fork integral with a lever hinged by means of a swivel joint, an intermediate point of the lever resting on one end of a hydraulic cylinder provided with a swivel joint, the other end of the hydraulic cylinder resting on the connection module being hinged by means of a swivel joint, the connector comprises at its periphery radical guide rollers co-operating with inclined ramps of the receptacle and grouped in pairs of superimposed rollers, of which the lower roller has a diameter less than that of the upper roller.

Abstract: A shield for protecting a well head and functional modules in an under sea station comprising a composite cushion formed from a floor 6 made from a material less dense than water, such as a plastic material or treated wood, and resting on a perforated metal sheet or grid 7, removably fixed by means of deformable feet 4 to a horizontal plate 1 mounted at the top of the module to be protected and having at the position where the guide column 2 passes an opening in which is welded a sleeve 14 capable of sliding along said guide columns 2.In a shield for protecting a module provided with a central connector, said plate has a central cage with vertical lateral wall for housing said connector, radial arms being fixed to the bodies of several shock absorbers spaced apart on said plate and to said wall of the cage for transmitting shock absorbing forces.

Abstract: Operations for returning to an underwater station equipped with a well apparatus.The device comprises a rectangular frame formed by tubes 1 and at the four corners of which are fixed vertical fixed tubes 2. Four diagonally disposed radial arms 4 extend from each corner and are fixed to tubes 2. In the longitudinal axis of the frame there is fixed to the arms 4 a well head connector 6 carried by a train of rods 7. One of the arms 4 carries a funnel 8 for guiding the frame. Inside tubes 2 are slidably placed weighted tubes, 11, whose upper part has a shoulder 13, inside which comes to bear an olive 14 crimped to a cable 12, which passes through tubes 2 and 11 and carries at its lower end a guide line connector 10 intended to be locked to a guide post 24.With the device, four guide lines may be positioned and connected simultaneously without being hindered by the encumbrance around the well head.

Abstract: An operation for re-entry to an underwater station equipped with a well apparatus.The device comprises, fixed at the end of a rod 1 of a train of rods, a support 2 from which is suspended a module 3 formed by uprights 8 disposed concentrically and connected together, a receptacle 13 being fixed to the center of the module, which is provided with a conical housing 30 for retaining connector 15 and a re-entry cone 14, said module being suspended from the support 2 by the guide line 19 whose tension is maintained constant by the pounding compensation means formed by two cables 7 fixed to the two ends of support 2 and to the two uprights 12 of the module, while passing over fixed pulleys 20 and 21 and a mobile pulley 22 weighted with a counterweight 23.A fitting device provided with means for compensating the pounding due to the swell.

Abstract: The invention provides a tool for disconnecting a guideline connector hooked in a sleeve forming the extension of a guide column of an underwater station, by means of retractable locking heads housed in a bore in the body of the connector.It comprises a re-entry cone, whose upper cylindrical part 1, adapted to cap the top of the connector having helical ramps, comprises swivel pins to cooperate with said ramps and is connected to a widened cylindrical part 4, ending in an upturned funnel 5, by a truncated cone-shaped part 3, with which are associated valve means 18 for controlling hydraulic cylinders 14 and 14a responsive to the pressure exerted by the body of the connector, when the re-entry cone rests on the connector, as well as two hydraulic cylinders 14 and 14a and hydro-pneumatic accumulator 12, mounted outside the cone.

Abstract: The invention relates to installation of underwater equipment, more specifically for use in oil-fields.This new device for connecting and disconnecting a guide line between an installation on the seabed and a floating platform comprises a cylindrical adapter, free to rotate on its own axis, and provided with means of guiding, directing, positioning lengthwise and locking into a cylindrical sleeve, forming the upper portion of a guide post fixed to the underwater installation. The locking mechanism comprises at least one locking head, which extends out from and can be detached from a locking bar. The lower edge of this locking head forms a retracting cam, while the horizontal upper surface forms a locking edge.Such a device can be used to connect and disconnect the guide line by remote control, from a floating platform.

Abstract: This device, positioned above the drill bit, comprises a body provided with an axial bore communicating with the drill string and distribution means, controlling the direction of flow of the flushing fluid, slidably mounted in said bore and having two positions. This distribution means can be shifted from a first to a second position and vice-versa by a succession of fluid supply periods separated by periods of interruption of the fluid supply.

Abstract: This drill bit comprises a plurality of rollers provided with cutting teeth or inserts.At least one vertical fluid flushing jet is directed towards the hole bottom between two adjacent rollers and at least one upwardly directed education jet is created. The nozzle delivering the flushing jet opens at a distance from between 1/3 H and 4/5 H from the hole bottom, H being the height of the cutters measured in a direction parallel to the bit axis.

Abstract: This drill bit comprises a plurality of rollers provided with cutting teeth or inserts.At least one upwardly directed eduction jet is created and the bit comprises at least one nozzle located between two adjacent rollers and creating at least two fluid jets respectively directed towards these two adjacent rollers.