Abstract: The invention si a multiphase flow metering method. The method includes a) determining at least two pressure values P1 and P2 for the different points A and B, and the value of the internal pressure Po of a device; and b) determining, from the values determined in step a) from the knowledge of the density of the gas phase and of the liquid phase and/or of the average value of the density of the multiphase medium in a slotted tube, from a relation connecting at least the following parameters: the level of the interface between the liquid phase and the gas phase and/or the volume ratio of the gas phase to the liquid phase (GLR) from pressure values P1, P2, Po, the total flow rate value Qt of the flowing multiphase medium and/or the flow rate qg, q1 of each of the phases.

Abstract: Pumping system for pumping fluids at low pressure comprising a pumping enclosure connected to a pipe 16 introducing the fluid to be pumped and a pipe 18 discharging the pumped fluid. The enclosure is connected to a pipe introducing a drive fluid and a reducer (P1, P2) of the drive fluid pressure transmitted to the pumped fluid.

Abstract: A pumping device providing direct energy exchange between a working fluid and a pumped fluid, comprising at least a first ejector propelling the working fluid in one direction and at least a second ejector propelling working fluid in a second direction. The axial thrust induced by the jet emitted in the first direction compensates at least partly that of a jet emitted in the second direction by another ejector.

Abstract: A pumping device providing direct energy exchange between a working fluid and a pumped fluid, comprising at least a first ejector propelling the working fluid in one direction and at least a second ejector propelling working fluid in a second direction. The axial thrust induced by the jet emitted in the first direction compensates at least partly that of a jet emitted in the second direction.

Abstract: A device for determining at least one parameter characteristic of a fluid with a variable density and at least one phase having different density values is disclosed. A process of measuring the density of a multi-phase petroleum effluent. A parameter associated with a fluid of variable density is determined by measuring the value by which a flexible element in contact with the fluid is deformed.

Abstract: Pumping method by direct energy exchange during which a drive fluid is sent intermittently in the form of one or more jets into a primary fluid.Pumping device comprising a hollow part (2) and a distributing part, each provided with orifices (Oi) and (Ei). A rotationally movable part (6) is interposed between the hollow part and the distributing part, and fitted with a blocking means in order to generate Jets of drive fluid intermittently toward a fluid to be transported.

Abstract: A multiphase piston-type pumping system including a feed line (13) for the fluid to be pumped and a discharge line (19) for the pumped fluid, with at least one first variable-volume chamber (2) designed for pumping, the fluid, and with chamber being defined by a first cylinder head (3), a first cylinder (4), and a first piston (5), whereby piston (5) moves along the longitudinal axis of cylinder (4) in the cylinder (4). A first drive element (6) moves the piston (5) in the cylinder (4). The system also has a casing (23) surrounding at least the space swept by piston (5), with the space being opposite the first chamber (2) with respect to and with the piston (5), said easing (23) containing a gaseous fluid. The piston (5) has a recess (20) designed to receive a projection (10) integral with cylinder head (3), whereby these two elements produce a jet of fluid directed at a discharge port (15).

Abstract: A pumping method for effecting direct energy exchange between a drive fluid and a primary fluid in a pipe wherein a plurality of fluid jets are produced from a static distributing part having at least one first orifice by causing a movable part having at least one means for blocking said at least one first orifice to rotate such that the plurality of fluid jets are sent intermittently as liquid pistons into the primary fluid located at a common meeting space positioned downstream of the static distributing part whereby the plurality of liquid pistons pump the primary fluid through said pipe.

Abstract: The presence of interfaces located between at least two phases having close but different acoustic impedance values and two phases having relatively remote acoustic impedance values is detected, at least one of these phases being likely to contain solid particles. A device for detecting the presence of the interfaces includes a container linked to at least one intake pipe for a multiphase fluid, a first unit for generating an ultrasonic wave in a direction not parallel to an interface, this unit also being designed to receive a signal generated by a reflection of the wave on the interface, and a processing unit which enables various measurements to be taken and processed so as to calculate the quantity of at least one of the phases present in a multiphase fluid.

Abstract: Pumping device for effecting direct energy exchange between a drive fluid and a primary fluid. The device has, in combination, a hollow static part allowing the drive fluid to pass, which static hollow part has at least one orifice and a distributing part having at least one opening the distributing part is located relative to the static hollow part to allow the drive fluid to pass from an orifice to an orifice, the distributing parts and the static part are joined by a connecting and sealing part, and a movable part is disposed in the space formed by the static hollow part, the distributing part, and the connecting part. The movable part has at least one means allowing orifices to be blocked, so that at least part of said drive fluid is ejected toward the primary fluid when the movable part rotates.

Abstract: The method involves introducing a pumping and measuring set into a production well fitted with a pipe or liner perforated in a part extending through a producing zone. This set is fastened to the end of a flow string and comprises an activation pump and at least one set for measuring the produced effluents. The improvement essentially consists in using secondary pumping means such as a positive-displacement type pump, for example, in order to suppress the pressure drop undergone by the effluents during passage through the measuring zone, which distorts the measured values and causes parasitic flows by bypassing between the liner and the wall of well. The extent of these leak rates can be measured through a variation of the flow rate of the positive-displacement pump.

Abstract: A method and a device for measuring the qualities of a fluid including at least two liquids, the two liquids having at least one characteristic intrinsic factor relative to microwaves for a given frequency, such as the loss factor. The characteristic of the fluid is measured by a microwave flux for at least two different microwave frequencies, and, with the values of the factors of the intrinsic characteristics of each of the fluids at the two frequencies being known, the respective quantities of the two liquids are determined. The invention applies in particular to measuring the concentrations and flowrates of various phases in a multiphase fluid such as a petroleum effluent having an aqueous phase.

Abstract: A method and device for pumping a petroleum fluid passing through a pipe and having a quantity of gas and a quantity of liquid. The quantities of gas and liquid are measured to determine the weight of the fluid in a section of the pipe and, depending upon the relative quantities of the gas and liquid measured, an additional quantity of gas or liquid is added prior to the fluid containing the additional quantity being pumped. After the fluid has been pumped, the quantity of gas or liquid serving as the additional added quantity is sampled.

Abstract: A method and device for fishing up an immersed body from a position spaced from and disposed above the immersed body. A fishing member is moored to the body, with the member including a support integral with the body and a releasable portion. The support and the releasable portion are initially assembled together. The releasable portion is released, leading to the separation of the releasable portion and the support. Upon the releasable portion reaching the position, at the level of the position lift connecting members are moored to the fishing member, with the lift connecting members being attached to the body and to the releasable portion. This fishing member is actuated so as to place the body in a vicinity of the fishing member.

Abstract: A method for mooring and connecting at least one flexible line end with a conduit of a floating sea edifice, with the method including the steps of mooring a harpoon to a float, which harpoon is attached to a first cable, pulling on the first cable to bring the float toward a support integral with the edifice, mooring the float to the support, and, with an arm fixed to the flexible line end and attached to the second cable, bringing the arm and the flexible line by the second cable and/or positioning in a position permitting connection with the conduit. The conduit is placed in a vicinity of the flexible line end, and the conduit and flexible line end are assembled and connected together, with the flexible line end being connected to the float.

Abstract: A method and a device for measuring the qualities of a fluid including at least two liquids, the two liquids having at least one characteristic intrinsic factor relative to microwaves for a given frequency, such as the loss factor. The characteristic of the fluid is measured by a microwave flux for at least two different microwave frequencies, and, with the values of the factors of the intrinsic characteristics of each of the fluids at the two frequencies being known, the respective quantities of the two liquids are determined. The invention applies in particular to measuring the concentrations and flowrates of various phases in a multiphase fluid such as a petroleum effluent having an aqueous phase.

Abstract: The method for analyzing a multiphase fluid flowing in a pipe (9, 11, 15, 16, 18) is characterized in particular by the following stages being accomplished:the flow is drawn off to a sump (28) for the time necessary for it to fill,once sump (28) is full, said flow is re-started in the pipe (9, 11, 15, 16, 18);the fluid located in the sump (28) is decanted until the various phases (70, 71, 72) of which the fluid is composed, separate;a parameter representing the volume of at least one phase is determined by measuring one characteristic sensitive to the variation in the composition of at least two phases of said fluid, anda macroscopic parameter that gives information on the quality of the fluid as a whole during filling of the sump and before and/or after filling of the sump (28), is monitored.

Abstract: A measuring method and device are provided for determining at least one pumping characteristic, or a parameter, of a fluid having at least a liquid phase and a multi-phase gas phase, with the parameter being the parameter called GLR which corresponds to the ratio of the volume of the gas phase to the volume of the liquid phase. The device comprises a positive-displacement pump, having a suction pressure, a delivery pressure and a chamber having a volume, as well as one of at least one of a pressure sensor in the chamber, a detector adapted for measuring pump work, and a sensor for knowing a volume of the chamber. The sensors and detectors each deliver a value, and the characteristic to be determined is a characteristic which is not measured by the device.

Abstract: A method and device are provided for the remote positioning of an elbow coupling from a main installation situated above the distant installation. The device or frame supports the coupling and is held at the level of a suspension member by means of a support element such as a cable for being possibly immobilized on the distant installation. The suspension member allows movements of the frame in a horizontal plane with respect to the end of the cable. The support member may move along three axes orthogonal to each other by means of jacks and in rotation about a vertical axis. These two members allow the frame and the elbow coupling to be positioned as well as the end of the coupling to be connected to a first line connected to the distant installation. The frame may include a clamp for connecting a second end of the coupling to the end of a second flexible line.

Abstract: A method and device are provided for remotely connecting an end of an elongate element to a connector integral with a main installation, comprising means for guiding said elongate element, first means for moving said guide means with respect to said main installation and second means for moving said end with respect to said connector.