Abstract: Gas-extraction device (152) for extracting at least one gas contained in a drilling mud, the device comprising: —an enclosure (162), —an equipment (164) for supplying the drilling mud to the enclosure (162), —an equipment (170) for introducing a carrier gas into the enclosure (62; 162), wherein the device comprises a flow regulator (204) able to regulate the flow rate of a gas flow containing at least carrier gas, and a pressure controller situated downstream of the enclosure (162) configured for locally setting a pressure lower than the pressure of the enclosure (162), wherein the flow, regulator (204) is interposed between the pressure controller and the enclosure (162).

Abstract: A method is presented for determining at least one piece of information representative of a phase fraction of a fluid in a pipe. The method comprises the estimation of a number of counts received in each measuring interval based on each piece of representative information determined at a preceding iteration, then calculating a residual comprising a first criterion calculated from probabilities using a given statistical law to measure, for each energy, the number of counts measured in each interval, the given statistical law being parameterized based on the number of estimated counts.

Abstract: A radiation source device, a measuring device using the radiation source device, and a method of use of the measuring device are described. The radiation source device has a radiolucent window portion, a shielding portion, a radioactive element, and a fluorescent material. The shielding portion has a window portion cavity and the radiolucent window portion extends across and encompasses the window portion cavity. The radioactive element is positioned within the window portion cavity of the shield portion and emits first photons through the window portion cavity and the radiolucent window portion. The fluorescent material is positioned between the radioactive element and the radiolucent window portion. The fluorescent material receives the first photons from the radioactive element and generates second photons.

Abstract: The tool includes a bearing member (70), a traction assembly (72) of the object (28), movably mounted in a first direction relative to the bearing member (70). It includes a plurality of hooking members (160), mounted radially mobile relative to the traction assembly (72) between a contracted configuration and a deployed configuration. The tool comprises means (164; 166) for keeping each hooking member (160) in its deployed configuration. It includes unlocking means (168; 170) that include an elastic stressing member (202; 222) applied on the holding means (164; 166). The elastic stressing member (202; 222) is capable of being compressed to cause the unlocking of the holding means (164; 166) and the passage of the hooking members (160) from their deployed configuration to their contracted configuration.

Abstract: A fast field mud gas analyzer is presented. The fast field mud gas analyzer has a splitter system; a plurality of analytical lines composed of a micro chromatographic column and one or more detector; one or more heating element; and a computer system. The splitter system selectively applies a portion of an effluent sample flow through one or more outlets. The analytical lines are in fluid communication with the splitter system and receive at least a portion of the effluent sample flow. The micro chromatographic column separates portions of the effluent sample flow. The detector analyzes the separated portions and generates information indicative of analysis of the separated portions. The heating element heats the portion of the effluent sample flow within the analytical line. The computer system controls the splitter system and the one or more heating element and receives the information from the detectors.

Abstract: A device including a lower assembly (30) and a cable (32) for deploying the lower assembly (30) in the well (12). The lower assembly (30) includes a pyrotechnic system (72), and a firing assembly further including a module (86) for controlling a power battery (88) and a power module (150). The control module (86) includes arming means (112; 158) of the power module (150) capable of connecting the power battery (88) to the power module (150) upon receiving an electrical arming signal transmitted through the cable (32). It includes means (114; 160) for triggering the pyrotechnic system (72) capable of connecting the power module (150) to the pyrotechnic system (72), upon receiving a distinct electrical triggering signal posterior to the arming signal.

Abstract: Method and apparatus for determining the relative content of a first rock species and of a second rock species in a rock sample extracted from a wellbore. The method comprises adding a reactant to the rock sample, measuring a first information (PT1) relative to a first amount of compound produced at a first instant (T1) and a second information (PT2) relative to a second amount of compound produced at a second instant (T2). The method also comprises calculating the relative content of the first species in the rock sample from the first information (PT1) and calculating the relative content of the second species in the rock sample from the second information PT2). The method comprises determining a corrected amount (Cv) of compound generated by the reaction of the second species with the reactant at the first instant (T1), and calculating the relative content of the first species in the rock sample and the relative content of the second species in the rock sample based on the corrected amount (Cv).

Abstract: This tool comprises an upper portion and a lower portion able to move relative to each other between a connected position and a completely disconnected position. The tool comprises an immobilization member that can be freed from the upper portion relative to the lower portion, a member for releasing the immobilization member, and a mechanism for moving the release member housed in the tool. The movement mechanism comprises an actuator and a receptor for receiving a control signal.

Abstract: A method for determining a first flow rate of a gas phase and a second flow rate of at least one liquid phase present in a polyphasic fluid circulating in a conduit is presented. The method essentially comprises circulating the polyphasic fluid through the neck of a venturi delimited by the conduit. The method further comprises estimating the first flow rate and the second flow rate by using a measured pressure difference of the fluid through the neck and a property representative of the relative surface occupied by the gas phase relative to a total surface over a cross-section of the neck. The step of estimating the first flow rate and the second flow rate further comprises (a1) calculating an amount representative of the liquid phase present in the gas rich core relative to the total amount of liquid phase in the neck and calculating the first and second flow rate as a function of the amount representative of the liquid phase present in the core calculated during step (a1).

Abstract: This device comprises a single radioactive source (44), capable of creating an incident beam (120), and a target (48) placed opposite the source (44). The target (48) is capable of creating the second beam (130) by interacting with a first part of the incident beam (120), a second part of the incident beam (120) passing through the target (48) to form the first beam (124).

Abstract: A device includes a device for forming a gaseous flow from the sample and a device for separation of each specific gaseous constituent. The device also includes a device for quantifying the relative contents of the two isotopes to be analyzed which comprise an optical measurement cell. The cell includes two mirrors which delimit a measurement cavity. The device includes a device for introducing an incident optical signal into the measurement cavity, a device for generating a plurality of reflections of the signal in separate points on each mirror during its travel in the cavity, a device for measuring a transmitted optical signal resulting from an interaction between the optical signal and each isotope in the measurement cavity, and a device for calculating the relative contents on the basis of these signals.

Abstract: A device (53) comprises an enclosure (63) and means (65, 67) for circulating a drilling mud in the enclosure (63). The inventive device is also provided with means (69) for introducing a gas carrier into the enclosure (63), which comprises a pipe (113) provided with a unit (121) for adjusting the gas carrier flowrate. The device (53) comprises a gas extracting pipe (71) open into the enclosure (63). The gas introducing means (69) comprise a sensor (123) for measuring a pressure at a point located downstream of the adjusting unit (121) and means (117) for controlling the flowrate of the gas carrier injected through said adjusting unit (121) according to the difference between a pressure measured by the sensor (123) and a determined gas extraction pressure.

Abstract: Method of calibration intended to be used in a process of determining the content of a plurality of compounds contained in a drilling fluid, the method comprising obtaining a calibration mud; performing a gas extraction from said calibration mud with at least two extraction stages in order to obtain at least two extracted gases; measuring parameters representative of the quantities of said calibration compounds in said extracted gases; and calculating correction factors using said measured parameters, the correction factors being intended to be used in said process.

Abstract: This mandrel (10) comprises a body (16; 22) and a radially expandable annular sealing element (18) which comprises a centring arrangement (46) and a closure arrangement (44) which can be deployed radially between a contracted configuration and a dilated configuration. It further comprises an anchoring element (20) which is positioned at a longitudinal distance from the sealing element (18) and is radially expandable between a retracted state and a deployed state. The mandrel (10) comprises sequencing means (24) which are capable of radially deploying the closure arrangement (44) after the anchoring element (20) and the centring arrangement (46). In an at least partly deployed configuration, the centring arrangement (46) defines at least one axial passage (64) which extends through the annular sealing element (18). The closure arrangement (44) closes the or each axial passage (64) as it is deployed.

Abstract: The invention relates to a safety device for an oil well and to the associated safety installation. The inventive device comprises a valve housing (40) which defines a fluid flow passage (52). The aforementioned housing (40) comprises a valve (48) which is used to seal the passage and which can move between an open position and a closed position and means for permanently biasing the valve towards the closed position thereof. The housing (40) also comprises releasable means (54) for connecting same to a working line with tubing that is intended to move the housing (40) in the conduit. In addition, the device comprises retractable means (42) for supporting the valve (58) in the open position and hydraulic means (44, 46) for actuating the support means (42) in order to activate same upon reception of a valve open control signal. The aforementioned support means (42) and actuation means (44, 46) are solidly connected to the housing (40) such that they can be moved simultaneously under the control of the line.

Abstract: A method and device includes measuring a multiple-phase fluid flowing through a pipe. The inventive method includes the following steps in which: a fluid is illuminated using a first coaxial probe placed in contact with the liquid phase of the fluid, and a first electromagnetic wave is emitted at a high frequency. The admittance at the interface between the first probe and the fluid is measured, and the fractions of at least two constituents of the liquid phase are calculated in order to obtain the effective permittivity (?1) of the phase. The method also includes the following steps in which: the fluid is illuminated using a second coaxial probe and a second electromagnetic wave is emitted at a low frequency. The admittance at the interface between the second probe and the liquid is measured, and the thickness (e) of the liquid is measured. The aforementioned calculation is performed on the basis of the calculated effective permittivity (?1) and the admittance measured by the second probe.

Abstract: The inventive device (53) comprises an enclosure (63), means (65) for supplying the drilling mud into the enclosure (63), and means (67) for discharging the drilling mud from the enclosure (63). The device also comprises means (69) for introducing a carrier gas into the enclosure (63) and a pipe (71), which serves to extract the gas discharging into the enclosure (63) and which is connected to suction means (109). The device (53) additionally comprises selective venting means (72) comprising a vent pipe (115) perforated over the extracting pipe (71) and means (117) for closing the vent pipe (115). These means (117) are designed for opening the vent pipe (115) when the pressure at at least one point (121) of the device is less than a predetermined set value. The invention is used for analyzing the gaseous content of muds from drilling oil wells.

Abstract: A device includes an analyzer (53) and a sampling apparatus (51) for taking a sample of at least one fraction of the gas that has at least one porous membrane element (55). The porous membrane element (55) has a support (63) and a first surface (57) which is in contact with liquid circulating in duct (13) and a second surface (59) which opens out into a duct (61) which is connected to the analyzer (53). The hardness of the first surface (57) is more than 1400 Vickers (kgf/mm2), ranging more particularly between 1400 and 1900 Vickers (kgf/mm2). The device can be used to analyze the gaseous content of oil well boring sludge.