WO2024110699A1 - Piston housing a temperature and/or pressure sensor for a thermodynamic characterisation device - Google Patents

Piston housing a temperature and/or pressure sensor for a thermodynamic characterisation device Download PDF

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Publication number
WO2024110699A1
WO2024110699A1 PCT/FR2022/052147 FR2022052147W WO2024110699A1 WO 2024110699 A1 WO2024110699 A1 WO 2024110699A1 FR 2022052147 W FR2022052147 W FR 2022052147W WO 2024110699 A1 WO2024110699 A1 WO 2024110699A1
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WO
WIPO (PCT)
Prior art keywords
sensor
piston
chamber
external surface
temperature
Prior art date
Application number
PCT/FR2022/052147
Other languages
French (fr)
Inventor
Jacques Bickert
Thomas DELHOSTE
Original Assignee
Irian Innovation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Irian Innovation filed Critical Irian Innovation
Priority to PCT/FR2022/052147 priority Critical patent/WO2024110699A1/en
Publication of WO2024110699A1 publication Critical patent/WO2024110699A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids

Definitions

  • the invention relates to the field of temperature and/or pressure measurement.
  • the invention is of particular interest in the sector of thermodynamic analysis of a fluid, for example an oil taken during exploration or exploitation drilling.
  • thermodynamic analysis of fluids has a volume and mass that does not allow transport to the sampling site, making it necessary to send samples to remote analysis laboratories.
  • a compact device has been proposed, described in document FR3001546A1, equipped with a compression chamber designed to receive a volume of fluid to be analyzed not exceeding 1 cm 3 .
  • This device includes a sensor equipped with a probe designed to be moved towards the chamber in order to measure the temperature of the fluid.
  • Such a temperature detection mechanism is complex to implement.
  • the invention aims to provide a measurement technique, particularly temperature measurement, reliable and compatible with a compact thermodynamic characterization device.
  • the subject of the invention is a device comprising a chamber capable of receiving a fluid, a piston configured to be able to modify the volume of the chamber and a pressure and/or temperature sensor.
  • the sensor is housed in the piston so as to present an external surface which delimits the chamber.
  • the invention makes it possible in particular to avoid dead volumes in the chamber.
  • the external surface of the sensor is flush with an external surface of the piston which also delimits the chamber.
  • the external surface of the sensor extends in a plane perpendicular to a direction of translation of the piston.
  • the senor forms a cylindrical pellet.
  • Said external surface of the piston may be annular.
  • the senor and the piston are fixed to each other using a weld bead.
  • this weld bead is configured to delimit the chamber.
  • the piston comprises an orifice configured to receive one or more cables intended to connect the sensor to a module for processing and/or analyzing measurement data.
  • the sensor preferably comprises, on the one hand, a body and, on the other hand, one or more measuring instruments connected to the body of the sensor.
  • said external surface of the sensor is formed by the body.
  • the sensor body comprises a cavity receiving the measuring instrument(s).
  • the measuring instruments include a pressure transducer, such as a strain gauge, and/or a temperature detector, such as a platinum resistance probe.
  • the piston has a diameter of between 1 mm and 100 mm, preferably less than 50 mm, more preferably less than 30 mm, for example equal to 25 mm.
  • the senor has a diameter of between 1 mm and 100 mm, preferably less than 50 mm, more preferably less than 20 mm, for example equal to 12 mm.
  • the device is intended for the thermodynamic characterization of a fluid contained in the chamber, the sensor being configured to measure the pressure and/or temperature of the fluid received in the chamber.
  • the device can be used to characterize numerous types of fluid, including but not limited to hydrocarbons such as petroleum.
  • the invention relates to a method of assembling a device as defined above.
  • the method preferably comprises inserting the sensor into a housing formed by the piston, for example in a direction of insertion parallel to a direction of movement of the piston.
  • the method comprises fixing the sensor to the piston, preferably by laser welding.
  • the method comprises fixing the measuring instrument(s) to the body of the sensor, preferably by gluing.
  • Fig. 1 is a partial view in longitudinal section of a thermodynamic characterization device according to the invention, according to a section plane passing through a translation axis of a piston of the device;
  • Fig. 2 is an enlargement of part of the device of Figure 1, centered on the piston, the cut parts being shown without hatching in order to facilitate the visualization of the references;
  • Fig. 3 is an enlargement of a part of the piston of the device of Figure 1, centered on the body of a sensor housed in the piston.
  • FIG. 1 a device 1 according to the invention, intended for the thermodynamic characterization of a fluid.
  • the device 1 comprises a fixed structure and a movable structure, relative to the fixed structure, in a longitudinal direction Dl.
  • the direction DI defines a first direction SI of movement of the mobile structure, going from the top to the bottom of Figure 1, and a second direction S2 going from the bottom to the top of Figure 1.
  • the fixed structure comprises different parts 3-6 assembled together in the manner illustrated in Figure 1, the mobile structure comprising a piston 7 and a tie rod 8 secured to each other in translation longitudinal, that is to say in the direction Dl.
  • part 3 of the fixed structure also called “body”
  • body includes an opening which passes through it on both sides. leaves in the direction Dl, so as to extend around an axis Al.
  • the opening of the body 3 comprises a bore 11 of axis Al and of diameter XI which extends over a longitudinal portion of dimension X2, as well as a bore 12 of axis Al and of diameter X3 which extends over a longitudinal portion of dimension X4.
  • the dimensions XI, X2, X3 and X4 are respectively equal to 28 mm, 28 mm, 25 mm and 4.55 mm.
  • the diameter X3 of the bore 12 being less than the diameter
  • the opening of the body 3 comprises a countersink 14 through which the bore 11 opens at a first longitudinal end of the body 3, also called "upper end".
  • the countersink 14 forms a shoulder 15 which defines an annular bearing surface extending in a plane perpendicular to the direction Dl.
  • the opening of the body 3 also includes a countersink 17 through which the bore 12 opens at a second longitudinal end of the body 3, also called “lower end”.
  • the countersink 17 forms a shoulder 18 which defines an annular bearing surface extending in a plane perpendicular to the direction Dl.
  • Part 4 of the fixed structure also called “porthole” because it is configured to allow visualization of the interior of the chamber 41, is housed in the countersink 17 of the body 3, so that a surface 21 of the porthole 4 either resting on the annular surface formed by the shoulder 18.
  • the porthole 4 thus closes the opening of the body 3 at its lower end.
  • the piston 7 is received in a housing of the fixed structure here formed by the bores 11 and 12 and by the countersink 14 of the body 3.
  • An annular seal 31 is arranged in the bore 11 so as to extend radially between the piston 7 and the surface of the body 3 which forms this bore 11.
  • the device 1 comprises a sensor 33 housed in the piston 7 so as to delimit with the piston 7 the chamber 41.
  • the sensor 33 and the piston 7 are described further below with reference to Figure 3.
  • the device 1 thus forms an annular chamber 41 which is delimited radially by the surface of the body 3 forming the bore 12. Longitudinally, the chamber 41 is delimited on the one hand, by the surface 21 of the porthole 4 and, on the other hand , by the end of the piston 7 receiving the sensor 33.
  • the piston 7 is mounted sliding in the direction Dl, and consequently along the axis Al along which it extends.
  • Figures 1 and 2 show the piston 7 in a first position, in which the chamber 41 has a volume having a first value.
  • the volume of the chamber is of the order of 1.5 cm 3 when the piston 7 is in the first position and substantially zero when the piston 7 is in the second position, the stroke of the piston 7 between the first and second position being 3 mm.
  • Chamber 41 thus forms a compression chamber capable of containing a fluid under pressure.
  • control of the piston 7 is carried out using an actuation system comprising an electric motor equipped with an encoder (not shown).
  • the actuation system comprises a transmission mechanism configured to transform a rotary movement of a motor shaft (not shown) into a translation of the piston 7 along Dl.
  • the transmission mechanism comprises a screw 52 configured to be driven in translation along an axis A2, parallel to the axis Al, under the action of a nut 53.
  • the motor shaft drives a screw (not shown), which cooperates with a wheel (not shown) secured to nut 53, so as to form a gear of the wheel and worm type.
  • the screw 52 cooperates with the nut 53 which is integral with the part 6 of the fixed structure, so that a rotation of the nut 53 around the axis A2 causes a translation of this screw 52 along Dl.
  • the transmission mechanism comprises in this example a lever arm 55 having a pivoting surface bearing on an axis 56 secured to the tie rod 8.
  • the axis 56 defines an axis of rotation perpendicular to the direction DI and passing through the translation axis Al.
  • the lever arm 55 is thus connected to the tie rod 8 according to a pivot connection.
  • the pivoting of the lever arm 55 on the fixed structure is ensured by a connecting rod 57 disposed between one end of the lever arm 55 and the part 5, also called “support”.
  • a connecting rod 57 makes it possible to improve the distribution of loads during the movement of the piston 7.
  • the lever arm 55 can be connected to the screw 52, to the tie rod 8 or to the piston 7, as well as to the fixed structure of the device 1 according to any conventional technique not implementing such a connecting rod 57.
  • the transmission to the piston 7 of the translation movement of the screw 52 by the lever arm 55 makes it possible to multiply the force transmitted to the piston 7 and to reduce in particular the size of the motor.
  • the device 1 further comprises a spring 61 for taking up play formed by a stack of conical washers which are configured to exert a tensile force on the tie rod 8, and subsequently on the piston 7, in the direction S2 of the direction Dl .
  • the mobile structure compresses the spring 61 which is dimensioned to maintain a load on this mobile structure and on the lever arm 55, in order to prevent play in the transmission mechanism from causing measurement errors.
  • the device 1 also comprises circuits and valves, not shown, provided on the one hand to introduce a sample of fluid into the chamber 41 with a view, for example, to an analysis and, on the other hand, to evacuate the fluid from room 41 in particular at the end of the analysis.
  • the device 1 comprises other organs, not shown, including but not limited to:
  • the device 1 makes it possible to carry out thermodynamic analyzes of a fluid such as a hydrocarbon oil, in particular by analysis of the phase behavior during a reduction in the volume of the chamber 41 under the action of a movement of piston 7.
  • Such analyzes can be carried out directly on an oil drilling site, for example, taking into account the size and mass of the device 1 which facilitates its transport.
  • the device 1 has a footprint of less than 0.1 m 3 and an overall mass of around fifteen kg.
  • the invention relates more specifically to the subassembly formed by the piston 7 and the sensor 33, described below with reference to Figure 3.
  • the sensor 33 comprises a body, which is the only part of the sensor 33 shown in Figures 1-3, as well as measuring instruments connected to the body which thus constitutes a support for these measuring instruments.
  • the body of the sensor 33 is in the form of a cylindrical pellet of diameter X5 equal to 12 mm, of thickness X6 equal to 2 mm and having the axis Al as its axis of symmetry.
  • the body of the sensor 33 has two surfaces 71 and 72 which define two longitudinal ends of the body and which are spaced along Al by a distance constituting its thickness X6.
  • the body of the sensor 33 also comprises a surface 73 which delimits the body radially, the surface 73 extending circumferentially around the axis Al which forms an axis of symmetry of this surface 73.
  • the body of the sensor 33 includes a countersink 75 which opens onto the surface 72 of the body, also called “internal surface”.
  • the counterbore 75 has a diameter X7 of 5.3 mm and a depth X8 of 0.85 mm.
  • the body of the sensor 33 includes an external chamfer forming a surface which connects the surfaces 71 and 73 to each other.
  • this external chamfer forms an angle of 45° relative to each of the surfaces 71 and 73 and has a dimension of 0.3 mm according to Al.
  • the piston 7 comprises in this example a cavity in the form of a countersink opening onto the surface 32, also called “external surface” of the piston 7.
  • This countersinking forms a shoulder 81 defining a depth, that is to say a distance along Al between the shoulder 81 and the surface 32, which corresponds substantially to the dimension X6 of the body of the sensor 33.
  • the countersink is radially delimited by a surface 82 of the piston 7 which extends circumferentially around the axis Al and which has a diameter slightly greater than the diameter X5 of the body of the sensor 33 in order to be able to insert it there.
  • the external surface 32 of the piston 7 thus has an annular geometry with axis Al.
  • the piston 7 includes an internal chamfer forming a surface which connects the surfaces 32 and 82 to each other.
  • this internal chamfer forms an angle of 45° relative to each of the surfaces 32 and 82 and has a dimension of 0.3 mm according to Al.
  • the piston 7 also includes an orifice 83 of diameter
  • X9 is greater than X7.
  • the body of the sensor 33 is housed in the piston 7 so as to extend radially inside the surface 82 of the piston 7, the internal surface 72 of the body of the sensor 33 bearing on the shoulder 81 so that its surface 71, also called “external surface”, is flush with the external surface 32 of the piston 7.
  • said outer chamfer formed by the body of the sensor 33 and said inner chamfer formed by the piston 7 face each other so as to together define a circular groove 90, in this example of a triangular section.
  • the body of the sensor 33 and the piston 7 are fixed to one another by laser welding so as to form a weld bead extending in this groove 90.
  • the chamber 41 is delimited, longitudinally on the side of the piston 7, by a composite surface formed both by the external surface 32 of the piston 7, by the external surface 71 of the body of the sensor 33 and by the cord welding which connects the body of the sensor 33 and the piston 7 to each other.
  • the surfaces 32 and 71 are both planar and extend in a plane perpendicular to the axis Al.
  • the weld bead is in this example treated so as to form an external surface extending in the same plane as the surfaces 32 and 71, that is to say so that said composite surface which delimits the chamber 41 is flat .
  • the measuring instruments of the sensor 33 include a strain gauge, or extensometry gauge, as well as a platinum resistance probe of the “PT100” type.
  • the extensometry gauge is in the form of a pellet having a diameter of approximately 5 mm and a thickness of a few tenths of a mm.
  • These measuring instruments are here arranged one on top of the other in the cavity 75 of the body of the sensor 33 and stuck to one another and to the body so as to hold them fixedly relative to the piston 7.
  • measuring instruments are connected to a signal conditioning module (not shown) by cables (not shown) which pass through the orifice 83 made in the piston 7 as well as an orifice 91 made in the tie rod 8.
  • the sensor 33 thus makes it possible to measure the pressure and the temperature of the fluid received in the chamber 41.
  • the sensor 33 may comprise a body having another geometry and/or carrying one or more measuring instruments not limited to those described above.
  • the sensor 33 may include only a pressure transducer or a temperature detector.

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Abstract

The invention relates to a device, preferably for the thermodynamic characterisation of a fluid, comprising a piston (7) and a pressure and/or temperature sensor (33) housed inside the piston (7). The invention also relates to a method for assembling such a sensor (33).

Description

Description Description
Titre : Piston logeant un capteur de température et/ou de pression pour dispositif de caractérisation thermodynamique Title: Piston housing a temperature and/or pressure sensor for thermodynamic characterization device
Domaine technique Technical area
L'invention se rapporte au domaine de la mesure de température et/ou de pression.The invention relates to the field of temperature and/or pressure measurement.
L'invention présente un intérêt particulier dans le secteur de l'analyse thermodynamique d'un fluide, par exemple une huile prélevée lors d'un forage d'exploration ou d'exploitation. The invention is of particular interest in the sector of thermodynamic analysis of a fluid, for example an oil taken during exploration or exploitation drilling.
État de la technique antérieure State of the prior art
Les équipements conventionnels pour l'analyse thermodynamique de fluide présentent un volume et une masse ne permettant pas leur transport sur site de prélèvement, rendant nécessaire l'envoi d'échantillons vers des laboratoires d'analyse distants. Conventional equipment for the thermodynamic analysis of fluids has a volume and mass that does not allow transport to the sampling site, making it necessary to send samples to remote analysis laboratories.
Des tentatives ont été menées pour miniaturiser ces équipements afin de pouvoir réaliser des analyses in situ. Attempts have been made to miniaturize this equipment in order to be able to carry out in situ analyses.
Dans ce contexte, il a été proposé un dispositif compact, décrit dans le document FR3001546A1, doté d'une chambre de compression prévue pour recevoir un volume de fluide à analyser n'excédant pas 1 cm3. Ce dispositif comprend un capteur doté d'une sonde prévue pour être déplacée vers la chambre afin de mesurer la température du fluide. In this context, a compact device has been proposed, described in document FR3001546A1, equipped with a compression chamber designed to receive a volume of fluid to be analyzed not exceeding 1 cm 3 . This device includes a sensor equipped with a probe designed to be moved towards the chamber in order to measure the temperature of the fluid.
Un tel mécanisme de détection de température est complexe à mettre en œuvre. Such a temperature detection mechanism is complex to implement.
Exposé de l'invention Presentation of the invention
L'invention a pour objectif de procurer une technique de mesure, notamment de température, fiable et compatible avec un dispositif de caractérisation thermodynamique compact. The invention aims to provide a measurement technique, particularly temperature measurement, reliable and compatible with a compact thermodynamic characterization device.
A cet effet, l'invention a pour objet un dispositif comprenant une chambre apte à recevoir un fluide, un piston configuré pour pouvoir modifier le volume de la chambre et un capteur de pression et/ou de température. Selon l'invention, le capteur est logé dans le piston de manière à présenter une surface externe qui délimite la chambre. To this end, the subject of the invention is a device comprising a chamber capable of receiving a fluid, a piston configured to be able to modify the volume of the chamber and a pressure and/or temperature sensor. According to the invention, the sensor is housed in the piston so as to present an external surface which delimits the chamber.
Un tel agencement du capteur permet tout à la fois de simplifier le dispositif et de réaliser des mesures fiables et précises. Such an arrangement of the sensor makes it possible both to simplify the device and to carry out reliable and precise measurements.
L'invention permet notamment d'éviter les volumes morts dans la chambre. The invention makes it possible in particular to avoid dead volumes in the chamber.
Il est préféré que la surface externe du capteur affleure une surface externe du piston qui délimite elle aussi la chambre. It is preferred that the external surface of the sensor is flush with an external surface of the piston which also delimits the chamber.
Dans un mode de réalisation, la surface externe du capteur s'étend dans un plan perpendiculaire à une direction de translation du piston. In one embodiment, the external surface of the sensor extends in a plane perpendicular to a direction of translation of the piston.
Dans un mode de réalisation, le capteur forme une pastille cylindrique. In one embodiment, the sensor forms a cylindrical pellet.
Ladite surface externe du piston peut être annulaire. Said external surface of the piston may be annular.
Dans un mode de réalisation, le capteur et le piston sont fixés l'un à l'autre à l'aide d'un cordon de soudure. In one embodiment, the sensor and the piston are fixed to each other using a weld bead.
De préférence, ce cordon de soudure est configuré pour délimiter la chambre.Preferably, this weld bead is configured to delimit the chamber.
Dans un mode de réalisation, le piston comprend un orifice configuré pour recevoir un ou plusieurs câbles destinés à raccorder le capteur à un module de traitement et/ou d'analyse de données de mesure. In one embodiment, the piston comprises an orifice configured to receive one or more cables intended to connect the sensor to a module for processing and/or analyzing measurement data.
Le capteur comprend, de préférence, d'une part un corps et d'autre part un ou plusieurs instruments de mesure reliés au corps du capteur. The sensor preferably comprises, on the one hand, a body and, on the other hand, one or more measuring instruments connected to the body of the sensor.
Il est préféré que ladite surface externe du capteur soit formée par le corps. It is preferred that said external surface of the sensor is formed by the body.
Dans un mode de réalisation, le corps du capteur comprend une cavité recevant le ou les instruments de mesure. In one embodiment, the sensor body comprises a cavity receiving the measuring instrument(s).
Dans un mode de réalisation, les instruments de mesure comprennent un transducteur de pression, tel qu'une jauge de déformation, et/ou un détecteur de température, tel qu'une sonde à résistance de platine. Dans un mode de réalisation, le piston a un diamètre compris entre 1 mm et 100 mm, de préférence inférieur à 50 mm, plus préférentiellement inférieur à 30 mm, par exemple égal à 25 mm. In one embodiment, the measuring instruments include a pressure transducer, such as a strain gauge, and/or a temperature detector, such as a platinum resistance probe. In one embodiment, the piston has a diameter of between 1 mm and 100 mm, preferably less than 50 mm, more preferably less than 30 mm, for example equal to 25 mm.
Dans un mode de réalisation, le capteur a un diamètre compris entre 1 mm et 100 mm, de préférence inférieur à 50 mm, plus préférentiellement inférieur à 20 mm, par exemple égal à 12 mm. In one embodiment, the sensor has a diameter of between 1 mm and 100 mm, preferably less than 50 mm, more preferably less than 20 mm, for example equal to 12 mm.
Dans un mode de réalisation, le dispositif est destiné à la caractérisation thermodynamique d'un fluide contenu dans la chambre, le capteur étant configuré pour mesurer la pression et/ou la température du fluide reçu dans la chambre. In one embodiment, the device is intended for the thermodynamic characterization of a fluid contained in the chamber, the sensor being configured to measure the pressure and/or temperature of the fluid received in the chamber.
Le dispositif peut être mis en œuvre pour caractériser de nombreux types de fluide, incluant de manière non limitative des hydrocarbures tels que du pétrole. The device can be used to characterize numerous types of fluid, including but not limited to hydrocarbons such as petroleum.
Selon un autre aspect, l'invention a pour objet un procédé d'assemblage d'un dispositif tel que défini ci-dessus. According to another aspect, the invention relates to a method of assembling a device as defined above.
Le procédé comprend de préférence une insertion du capteur dans un logement formé par le piston, par exemple selon une direction d'insertion parallèle à une direction de déplacement du piston. The method preferably comprises inserting the sensor into a housing formed by the piston, for example in a direction of insertion parallel to a direction of movement of the piston.
Dans un mode de mise en œuvre, le procédé comprend une fixation du capteur au piston, de préférence par soudage laser. In one embodiment, the method comprises fixing the sensor to the piston, preferably by laser welding.
Dans un mode de mise en œuvre, le procédé comprend une fixation du ou des instruments de mesure au corps du capteur, de préférence par collage. In one mode of implementation, the method comprises fixing the measuring instrument(s) to the body of the sensor, preferably by gluing.
D'autres avantages et caractéristiques de l'invention apparaîtront à la lecture de la description détaillée, non limitative, qui suit. Other advantages and characteristics of the invention will appear on reading the detailed, non-limiting description which follows.
Brève description des dessins Brief description of the drawings
La description détaillée qui suit fait référence aux dessins annexés sur lesquels :The detailed description which follows refers to the appended drawings in which:
Fig. 1 est une vue partielle en coupe longitudinale d'un dispositif de caractérisation thermodynamique conforme à l'invention, selon un plan de coupe passant par un axe de translation d'un piston du dispositif ; Fig. 2 est un agrandissement d'une partie du dispositif de la figure 1, centré sur le piston, les pièces coupées étant représentées sans hachures afin de faciliter la visualisation des références ; Fig. 1 is a partial view in longitudinal section of a thermodynamic characterization device according to the invention, according to a section plane passing through a translation axis of a piston of the device; Fig. 2 is an enlargement of part of the device of Figure 1, centered on the piston, the cut parts being shown without hatching in order to facilitate the visualization of the references;
Fig. 3 est un agrandissement d'une partie du piston du dispositif de la figure 1, centré sur le corps d'un capteur logé dans le piston. Fig. 3 is an enlargement of a part of the piston of the device of Figure 1, centered on the body of a sensor housed in the piston.
Description détaillée de modes de réalisation Detailed description of embodiments
Il est représenté sur la figure 1 un dispositif 1 conforme à l'invention, destiné à la caractérisation thermodynamique d'un fluide. There is shown in Figure 1 a device 1 according to the invention, intended for the thermodynamic characterization of a fluid.
Le dispositif 1 comprend une structure fixe et une structure mobile, relativement à la structure fixe, selon une direction longitudinale Dl. La direction DI définit un premier sens SI de déplacement de la structure mobile, allant du haut vers le bas de la figure 1, et un deuxième sens S2 allant du bas vers le haut de la figure 1. The device 1 comprises a fixed structure and a movable structure, relative to the fixed structure, in a longitudinal direction Dl. The direction DI defines a first direction SI of movement of the mobile structure, going from the top to the bottom of Figure 1, and a second direction S2 going from the bottom to the top of Figure 1.
Dans cet exemple non limitatif, la structure fixe comprend différentes pièces 3-6 assemblées les unes aux autres de la manière illustrée sur la figure 1, la structure mobile comprenant un piston 7 et un tirant 8 solidaires l'un de l'autre en translation longitudinale, c'est-à-dire selon la direction Dl. In this non-limiting example, the fixed structure comprises different parts 3-6 assembled together in the manner illustrated in Figure 1, the mobile structure comprising a piston 7 and a tie rod 8 secured to each other in translation longitudinal, that is to say in the direction Dl.
En référence à la figure 2, qui montre un agrandissement d'une partie de ces structures fixe et mobile, centré sur le piston 7, la pièce 3 de la structure fixe, aussi appelée « corps », comprend une ouverture qui la traverse de part en part selon la direction Dl, de manière à s'étendre autour d'un axe Al. With reference to Figure 2, which shows an enlargement of a part of these fixed and mobile structures, centered on the piston 7, part 3 of the fixed structure, also called "body", includes an opening which passes through it on both sides. leaves in the direction Dl, so as to extend around an axis Al.
L'ouverture du corps 3 comprend un alésage 11 d'axe Al et de diamètre XI qui s'étend sur une portion longitudinale de dimension X2, ainsi qu'un alésage 12 d'axe Al et de diamètre X3 qui s'étend sur une portion longitudinale de dimension X4. The opening of the body 3 comprises a bore 11 of axis Al and of diameter XI which extends over a longitudinal portion of dimension X2, as well as a bore 12 of axis Al and of diameter X3 which extends over a longitudinal portion of dimension X4.
Dans cet exemple nullement limitatif, les dimensions XI, X2, X3 et X4 sont respectivement égales à 28 mm, 28 mm, 25 mm et 4,55 mm. In this non-limiting example, the dimensions XI, X2, X3 and X4 are respectively equal to 28 mm, 28 mm, 25 mm and 4.55 mm.
Le diamètre X3 de l'alésage 12 étant inférieur au diamètre XI de l'alésage 11, le corps 3 forme un épaulement 13 définissant une surface d'appui annulaire qui s'étend dans un plan perpendiculaire à la direction Dl. Dans cet exemple, l'ouverture du corps 3 comprend un lamage 14 par lequel l'alésage 11 débouche au niveau d'une première extrémité longitudinale du corps 3, aussi appelée « extrémité supérieure ». Le lamage 14 forme un épaulement 15 qui définit une surface d'appui annulaire s'étendant dans un plan perpendiculaire à la direction Dl. The diameter X3 of the bore 12 being less than the diameter In this example, the opening of the body 3 comprises a countersink 14 through which the bore 11 opens at a first longitudinal end of the body 3, also called "upper end". The countersink 14 forms a shoulder 15 which defines an annular bearing surface extending in a plane perpendicular to the direction Dl.
L'ouverture du corps 3 comprend aussi un lamage 17 par lequel l'alésage 12 débouche au niveau d'une deuxième extrémité longitudinale du corps 3, aussi appelée « extrémité inférieure ». Le lamage 17 forme un épaulement 18 qui définit une surface d'appui annulaire s'étendant dans un plan perpendiculaire à la direction Dl. The opening of the body 3 also includes a countersink 17 through which the bore 12 opens at a second longitudinal end of the body 3, also called "lower end". The countersink 17 forms a shoulder 18 which defines an annular bearing surface extending in a plane perpendicular to the direction Dl.
La pièce 4 de la structure fixe, aussi appelée « hublot » car elle est configurée pour permettre une visualisation de l'intérieur de la chambre 41, est logée dans le lamage 17 du corps 3, de sorte qu'une surface 21 du hublot 4 soit en appui sur la surface annulaire formée par l'épaulement 18. Part 4 of the fixed structure, also called "porthole" because it is configured to allow visualization of the interior of the chamber 41, is housed in the countersink 17 of the body 3, so that a surface 21 of the porthole 4 either resting on the annular surface formed by the shoulder 18.
Le hublot 4 obture ainsi l'ouverture du corps 3 au niveau de son extrémité inférieure. The porthole 4 thus closes the opening of the body 3 at its lower end.
Le piston 7 est reçu dans un logement de la structure fixe ici formé par les alésages 11 et 12 et par le lamage 14 du corps 3. The piston 7 is received in a housing of the fixed structure here formed by the bores 11 and 12 and by the countersink 14 of the body 3.
Un joint 31 d'étanchéité annulaire est disposé dans l'alésage 11 de manière à s'étendre radialement entre le piston 7 et la surface du corps 3 qui forme cet alésage 11. An annular seal 31 is arranged in the bore 11 so as to extend radially between the piston 7 and the surface of the body 3 which forms this bore 11.
Le dispositif 1 comprend un capteur 33 logé dans le piston 7 de manière à délimiter avec le piston 7 la chambre 41. Le capteur 33 et le piston 7 sont décrits plus loin ci-dessous en référence à la figure 3. The device 1 comprises a sensor 33 housed in the piston 7 so as to delimit with the piston 7 the chamber 41. The sensor 33 and the piston 7 are described further below with reference to Figure 3.
Le dispositif 1 forme ainsi une chambre 41 annulaire qui est délimitée radialement par la surface du corps 3 formant l'alésage 12. Longitudinalement, la chambre 41 est délimitée d'une part, par la surface 21 du hublot 4 et, d'autre part, par l'extrémité du piston 7 recevant le capteur 33. The device 1 thus forms an annular chamber 41 which is delimited radially by the surface of the body 3 forming the bore 12. Longitudinally, the chamber 41 is delimited on the one hand, by the surface 21 of the porthole 4 and, on the other hand , by the end of the piston 7 receiving the sensor 33.
Le piston 7 est monté coulissant selon la direction Dl, et par suite selon l'axe Al le long duquel il s'étend. Les figures 1 et 2 montrent le piston 7 dans une première position, dans laquelle la chambre 41 présente un volume ayant une première valeur. Un déplacement du piston 7 en direction du hublot 4, jusqu'à une deuxième position (non représentée), permet de réduire le volume de la chambre 41 jusqu'à une deuxième valeur inférieure à la première valeur. The piston 7 is mounted sliding in the direction Dl, and consequently along the axis Al along which it extends. Figures 1 and 2 show the piston 7 in a first position, in which the chamber 41 has a volume having a first value. A movement of the piston 7 towards the window 4, to a second position (not shown), makes it possible to reduce the volume of the chamber 41 to a second value lower than the first value.
Dans cet exemple nullement limitatif, le volume de la chambre est de l'ordre de 1,5 cm3 lorsque le piston 7 est dans la première position et sensiblement nul lorsque le piston 7 est dans la deuxième position, la course du piston 7 entre la première et la deuxième position étant de 3 mm. In this non-limiting example, the volume of the chamber is of the order of 1.5 cm 3 when the piston 7 is in the first position and substantially zero when the piston 7 is in the second position, the stroke of the piston 7 between the first and second position being 3 mm.
La chambre 41 forme ainsi une chambre de compression apte à contenir un fluide sous pression. Chamber 41 thus forms a compression chamber capable of containing a fluid under pressure.
Dans l'exemple de la figure 1, la commande du piston 7 est réalisée à l'aide d'un système d'actionnement comprenant moteur électrique équipé d'un codeur (non représenté). In the example of Figure 1, the control of the piston 7 is carried out using an actuation system comprising an electric motor equipped with an encoder (not shown).
Le système d'actionnement comprend un mécanisme de transmission configuré pour transformer un mouvement rotatif d'un arbre moteur (non représenté) en une translation du piston 7 selon Dl. The actuation system comprises a transmission mechanism configured to transform a rotary movement of a motor shaft (not shown) into a translation of the piston 7 along Dl.
Dans cet exemple non limitatif, le mécanisme de transmission comprend une vis 52 configurée pour être entraînée en translation suivant un axe A2, parallèle à l'axe Al, sous l'action d'un écrou 53. L'arbre moteur entraîne une vis (non représentée), qui coopère avec une roue (non représentée) solidaire de l'écrou 53, de manière à former un engrenage du type roue et vis sans fin. In this non-limiting example, the transmission mechanism comprises a screw 52 configured to be driven in translation along an axis A2, parallel to the axis Al, under the action of a nut 53. The motor shaft drives a screw ( not shown), which cooperates with a wheel (not shown) secured to nut 53, so as to form a gear of the wheel and worm type.
La vis 52 coopère avec l'écrou 53 qui est solidaire de la pièce 6 de la structure fixe, de sorte qu'une rotation de l'écrou 53 autour de l'axe A2 entraîne une translation de cette vis 52 selon Dl. The screw 52 cooperates with the nut 53 which is integral with the part 6 of the fixed structure, so that a rotation of the nut 53 around the axis A2 causes a translation of this screw 52 along Dl.
Le mécanisme de transmission comprend dans cet exemple un bras de levier 55 ayant une surface de pivotement en appui sur un axe 56 solidaire du tirant 8. L'axe 56 définit un axe de rotation perpendiculaire à la direction DI et passant par l'axe de translation Al. Le bras de levier 55 est ainsi relié au tirant 8 selon une liaison pivot. The transmission mechanism comprises in this example a lever arm 55 having a pivoting surface bearing on an axis 56 secured to the tie rod 8. The axis 56 defines an axis of rotation perpendicular to the direction DI and passing through the translation axis Al. The lever arm 55 is thus connected to the tie rod 8 according to a pivot connection.
Dans l'exemple de la figure 1, le pivotement du bras de levier 55 sur la structure fixe est assuré par une bielle 57 disposée entre une extrémité du bras de levier 55 et la pièce 5, aussi appelée « support ». Une telle bielle 57 permet d'améliorer la répartition des charges lors du déplacement du piston 7. Dans une variante non représentée, le bras de levier 55 peut être relié à la vis 52, au tirant 8 ou au piston 7, ainsi qu'à la structure fixe du dispositif 1 selon toute technique conventionnelle ne mettant pas en œuvre une telle bielle 57. In the example of Figure 1, the pivoting of the lever arm 55 on the fixed structure is ensured by a connecting rod 57 disposed between one end of the lever arm 55 and the part 5, also called "support". Such a connecting rod 57 makes it possible to improve the distribution of loads during the movement of the piston 7. In a variant not shown, the lever arm 55 can be connected to the screw 52, to the tie rod 8 or to the piston 7, as well as to the fixed structure of the device 1 according to any conventional technique not implementing such a connecting rod 57.
Plus généralement, la transmission au piston 7 du mouvement de translation de la vis 52 par le bras de levier 55 permet de démultiplier l'effort transmis au piston 7 et de réduire notamment la taille du moteur. More generally, the transmission to the piston 7 of the translation movement of the screw 52 by the lever arm 55 makes it possible to multiply the force transmitted to the piston 7 and to reduce in particular the size of the motor.
Le dispositif 1 comprend par ailleurs un ressort 61 de rattrapage de jeu formé par un empilement de rondelles coniques qui sont configurées pour exercer un effort de traction sur le tirant 8, et par suite sur le piston 7, dans le sens S2 de la direction Dl. The device 1 further comprises a spring 61 for taking up play formed by a stack of conical washers which are configured to exert a tensile force on the tie rod 8, and subsequently on the piston 7, in the direction S2 of the direction Dl .
Ainsi, lorsque le piston 7 est déplacé dans le sens SI sous l'action du bras de levier 55, la structure mobile comprime le ressort 61 qui est dimensionné pour maintenir une charge sur cette structure mobile et sur le bras de levier 55, afin d'éviter qu'un jeu présent dans le mécanisme de transmission n'entraîne des erreurs de mesure. Thus, when the piston 7 is moved in the direction SI under the action of the lever arm 55, the mobile structure compresses the spring 61 which is dimensioned to maintain a load on this mobile structure and on the lever arm 55, in order to prevent play in the transmission mechanism from causing measurement errors.
Le dispositif 1 comprend par ailleurs des circuits et des vannes, non représentés, prévus d'une part pour introduire un échantillon de fluide dans la chambre 41 en vue par exemple d'une analyse et, d'autre part, pour évacuer le fluide de la chambre 41 notamment en fin d'analyse. The device 1 also comprises circuits and valves, not shown, provided on the one hand to introduce a sample of fluid into the chamber 41 with a view, for example, to an analysis and, on the other hand, to evacuate the fluid from room 41 in particular at the end of the analysis.
De manière connue en soi, le dispositif 1 comprend d'autres organes, non représentés, incluant de façon non limitative : In a manner known per se, the device 1 comprises other organs, not shown, including but not limited to:
- un système de chauffage du fluide contenu dans la chambre 41, et/ou - a system for heating the fluid contained in chamber 41, and/or
- une caméra haute définition pour étudier des changements de phase et/ou des sédimentations du fluide contenu dans la chambre 41, et/ou - un système d'agitation du fluide contenu dans la chambre 41, par exemple par vibrations, et/ou - a high definition camera to study phase changes and/or sedimentation of the fluid contained in chamber 41, and/or - a system for stirring the fluid contained in the chamber 41, for example by vibration, and/or
- un système de refroidissement du fluide contenu dans la chambre 41, et/ou- a system for cooling the fluid contained in chamber 41, and/or
- un gazomètre relié à la chambre 41 afin de réaliser des essais complémentaires. - a gasometer connected to chamber 41 in order to carry out additional tests.
De manière générale, le dispositif 1 permet de réaliser des analyses thermodynamiques d'un fluide telle qu'une huile hydrocarbonée, en particulier par analyse du comportement de phase lors d'une réduction du volume de la chambre 41 sous l'action d'un déplacement du piston 7. In general, the device 1 makes it possible to carry out thermodynamic analyzes of a fluid such as a hydrocarbon oil, in particular by analysis of the phase behavior during a reduction in the volume of the chamber 41 under the action of a movement of piston 7.
De telles analyses peuvent être réalisées directement sur site de forage pétrolier, par exemple, compte tenu de l'encombrement et de la masse du dispositif 1 qui facilitent son transport. Dans cet exemple, le dispositif 1 présente un encombrement inférieur à 0,1 m3 et une masse globale d'une quinzaine de kg. Such analyzes can be carried out directly on an oil drilling site, for example, taking into account the size and mass of the device 1 which facilitates its transport. In this example, the device 1 has a footprint of less than 0.1 m 3 and an overall mass of around fifteen kg.
L'invention se rapporte plus spécifiquement au sous-ensemble formé par le piston 7 et le capteur 33, décrit ci-après en référence à la figure 3. The invention relates more specifically to the subassembly formed by the piston 7 and the sensor 33, described below with reference to Figure 3.
Le capteur 33 comprend un corps, qui est la seule partie du capteur 33 représentée sur les figures 1-3, ainsi que des instruments de mesure reliés au corps qui constitue ainsi un support pour ces instruments de mesure. The sensor 33 comprises a body, which is the only part of the sensor 33 shown in Figures 1-3, as well as measuring instruments connected to the body which thus constitutes a support for these measuring instruments.
Dans cet exemple nullement limitatif, le corps du capteur 33 se présente sous la forme d'une pastille cylindrique de diamètre X5 égal à 12 mm, d'épaisseur X6 égale à 2 mm et ayant pour axe de symétrie l'axe Al. In this non-limiting example, the body of the sensor 33 is in the form of a cylindrical pellet of diameter X5 equal to 12 mm, of thickness X6 equal to 2 mm and having the axis Al as its axis of symmetry.
Le corps du capteur 33 présente deux surfaces 71 et 72 qui définissent deux extrémités longitudinales du corps et qui sont espacées selon Al d'une distance constituant son épaisseur X6. Le corps du capteur 33 comprend aussi une surface 73 qui délimite le corps radialement, la surface 73 s'étendant circonférentiellement autour de l'axe Al qui forme un axe de symétrie de cette surface 73. The body of the sensor 33 has two surfaces 71 and 72 which define two longitudinal ends of the body and which are spaced along Al by a distance constituting its thickness X6. The body of the sensor 33 also comprises a surface 73 which delimits the body radially, the surface 73 extending circumferentially around the axis Al which forms an axis of symmetry of this surface 73.
Le corps du capteur 33 comprend un lamage 75 qui débouche sur la surface 72 du corps, aussi appelée « surface interne ». Dans cet exemple particulier, le lamage 75 présente un diamètre X7 de 5,3 mm et une profondeur X8 de 0,85 mm. The body of the sensor 33 includes a countersink 75 which opens onto the surface 72 of the body, also called “internal surface”. In this particular example, the counterbore 75 has a diameter X7 of 5.3 mm and a depth X8 of 0.85 mm.
Le corps du capteur 33 comprend un chanfrein extérieur formant une surface qui relie les surfaces 71 et 73 l'une à l'autre. De manière non limitative, ce chanfrein extérieur forme un angle de 45° par rapport à chacune des surfaces 71 et 73 et présentant une dimension de 0,3 mm selon Al. The body of the sensor 33 includes an external chamfer forming a surface which connects the surfaces 71 and 73 to each other. In a non-limiting manner, this external chamfer forms an angle of 45° relative to each of the surfaces 71 and 73 and has a dimension of 0.3 mm according to Al.
Le piston 7 comprend dans cet exemple une cavité sous forme de lamage débouchant sur la surface 32, aussi appelée « surface externe » du piston 7. The piston 7 comprises in this example a cavity in the form of a countersink opening onto the surface 32, also called “external surface” of the piston 7.
Ce lamage forme un épaulement 81 définissant une profondeur, c'est-à-dire une distance selon Al entre l'épaulement 81 et la surface 32, qui correspond sensiblement à la dimension X6 du corps du capteur 33. This countersinking forms a shoulder 81 defining a depth, that is to say a distance along Al between the shoulder 81 and the surface 32, which corresponds substantially to the dimension X6 of the body of the sensor 33.
Le lamage est radialement délimité par une surface 82 du piston 7 qui s'étend circonférentiellement autour de l'axe Al et qui présente un diamètre légèrement supérieur au diamètre X5 du corps du capteur 33 afin de pouvoir l'y insérer. The countersink is radially delimited by a surface 82 of the piston 7 which extends circumferentially around the axis Al and which has a diameter slightly greater than the diameter X5 of the body of the sensor 33 in order to be able to insert it there.
La surface externe 32 du piston 7 présente ainsi une géométrie annulaire d'axe Al.The external surface 32 of the piston 7 thus has an annular geometry with axis Al.
Le piston 7 comprend un chanfrein intérieur formant une surface qui relie les surfaces 32 et 82 l'une à l'autre. Dans cet exemple, ce chanfrein intérieur forme un angle de 45° par rapport à chacune des surfaces 32 et 82 et présente une dimension de 0,3 mm selon Al. The piston 7 includes an internal chamfer forming a surface which connects the surfaces 32 and 82 to each other. In this example, this internal chamfer forms an angle of 45° relative to each of the surfaces 32 and 82 and has a dimension of 0.3 mm according to Al.
Le piston 7 comprend aussi un orifice 83 de diamètre X9 qui le traverse le long de l'axe Al de manière à déboucher dans le lamage du piston 7, au niveau de l'épaulement 81 qui forme ainsi une surface annulaire d'axe Al. Dans cet exemple, X9 est supérieur à X7. The piston 7 also includes an orifice 83 of diameter In this example, X9 is greater than X7.
Le corps du capteur 33 est logé dans le piston 7 de manière à s'étendre radialement à l'intérieur de la surface 82 du piston 7, la surface interne 72 du corps du capteur 33 venant en appui sur l'épaulement 81 de sorte que sa surface 71, aussi appelée « surface externe », affleure la surface externe 32 du piston 7. Dans cette configuration, ledit chanfrein extérieur formé par le corps du capteur 33 et ledit chanfrein intérieur formé par le piston 7 sont en regard l'un de l'autre de manière à définir ensemble une rainure 90 circulaire, dans cet exemple de section triangulaire. The body of the sensor 33 is housed in the piston 7 so as to extend radially inside the surface 82 of the piston 7, the internal surface 72 of the body of the sensor 33 bearing on the shoulder 81 so that its surface 71, also called “external surface”, is flush with the external surface 32 of the piston 7. In this configuration, said outer chamfer formed by the body of the sensor 33 and said inner chamfer formed by the piston 7 face each other so as to together define a circular groove 90, in this example of a triangular section.
Dans cet exemple, le corps du capteur 33 et le piston 7 sont fixés l'un à l'autre par soudage laser de sorte à former un cordon de soudure s'étendant dans cette rainure 90. In this example, the body of the sensor 33 and the piston 7 are fixed to one another by laser welding so as to form a weld bead extending in this groove 90.
Il résulte de cet assemblage que la chambre 41 est délimitée, longitudinalement du côté du piston 7, par une surface composite formée à la fois par la surface externe 32 du piston 7, par la surface externe 71 du corps du capteur 33 et par le cordon de soudure qui relie l'un à l'autre le corps du capteur 33 et le piston 7. It results from this assembly that the chamber 41 is delimited, longitudinally on the side of the piston 7, by a composite surface formed both by the external surface 32 of the piston 7, by the external surface 71 of the body of the sensor 33 and by the cord welding which connects the body of the sensor 33 and the piston 7 to each other.
Dans cet exemple, les surfaces 32 et 71 sont toutes deux planes et s'étendent dans un plan perpendiculaire à l'axe Al. In this example, the surfaces 32 and 71 are both planar and extend in a plane perpendicular to the axis Al.
Le cordon de soudure est dans cet exemple traité de manière à former une surface externe s'étendant dans le même plan que les surfaces 32 et 71, c'est-à-dire de sorte que ladite surface composite qui délimite la chambre 41 soit plane. The weld bead is in this example treated so as to form an external surface extending in the same plane as the surfaces 32 and 71, that is to say so that said composite surface which delimits the chamber 41 is flat .
Dans cet exemple, les instruments de mesure du capteur 33, non représentés sur les figures 1-3, comprennent une jauge de déformation, ou jauge d'extensométrie, ainsi qu'une sonde à résistance de platine du type « PT100 ». In this example, the measuring instruments of the sensor 33, not shown in Figures 1-3, include a strain gauge, or extensometry gauge, as well as a platinum resistance probe of the “PT100” type.
La jauge d'extensométrie se présente sous la forme d'une pastille ayant un diamètre d'environ 5 mm et une épaisseur de quelques dixièmes de mm. The extensometry gauge is in the form of a pellet having a diameter of approximately 5 mm and a thickness of a few tenths of a mm.
Ces instruments de mesure sont ici disposés l'un sur l'autre dans la cavité 75 du corps du capteur 33 et collés l'un à l'autre et au corps de manière à les maintenir fixement par rapport au piston 7. These measuring instruments are here arranged one on top of the other in the cavity 75 of the body of the sensor 33 and stuck to one another and to the body so as to hold them fixedly relative to the piston 7.
Ces instruments de mesure sont raccordés à un module (non représenté) de conditionnement de signal par des câbles (non représentés) qui traversent l'orifice 83 réalisé dans le piston 7 ainsi qu'un orifice 91 ménagé dans le tirant 8. These measuring instruments are connected to a signal conditioning module (not shown) by cables (not shown) which pass through the orifice 83 made in the piston 7 as well as an orifice 91 made in the tie rod 8.
Le capteur 33 permet ainsi de mesurer la pression et la température du fluide reçu dans le chambre 41. Bien entendu, de nombreuses variantes peuvent être apportées au dispositif qui vient d'être décrit. Notamment, le capteur 33 peut comprendre un corps ayant une autre géométrie et/ou portant un ou plusieurs instruments de mesure non limités à ceux décrits ci-dessus. Par exemple, le capteur 33 peut comprend uniquement un transducteur de pression ou un détecteur de température. The sensor 33 thus makes it possible to measure the pressure and the temperature of the fluid received in the chamber 41. Of course, numerous variations can be made to the device which has just been described. In particular, the sensor 33 may comprise a body having another geometry and/or carrying one or more measuring instruments not limited to those described above. For example, the sensor 33 may include only a pressure transducer or a temperature detector.

Claims

Revendications Claims
1. Dispositif (1) comprenant une chambre (41) apte à recevoir un fluide, un piston (7) configuré pour pouvoir modifier le volume de la chambre (41) et un capteur (33) de pression et/ou de température, caractérisé en ce que le capteur (33) est logé dans le piston (7) de manière à présenter une surface externe (71) qui délimite la chambre (41). 1. Device (1) comprising a chamber (41) capable of receiving a fluid, a piston (7) configured to be able to modify the volume of the chamber (41) and a pressure and/or temperature sensor (33), characterized in that the sensor (33) is housed in the piston (7) so as to present an external surface (71) which delimits the chamber (41).
2. Dispositif (1) selon la revendication 1, dans lequel la surface externe (71) du capteur (33) affleure une surface externe (32) du piston (7) qui délimite elle aussi la chambre (41). 2. Device (1) according to claim 1, in which the external surface (71) of the sensor (33) is flush with an external surface (32) of the piston (7) which also delimits the chamber (41).
3. Dispositif (1) selon la revendication 1 ou 2, dans lequel la surface externe (71) du capteur (33) s'étend dans un plan perpendiculaire à une direction (Dl) de translation du piston (7). 3. Device (1) according to claim 1 or 2, wherein the external surface (71) of the sensor (33) extends in a plane perpendicular to a direction (Dl) of translation of the piston (7).
4. Dispositif (1) selon l'une quelconque des revendications ! à 3, dans lequel le capteur (33) forme une pastille cylindrique. 4. Device (1) according to any one of the claims! to 3, in which the sensor (33) forms a cylindrical pellet.
5. Dispositif (1) selon l'une quelconque des revendications 1 à 4, dans lequel ladite surface externe (32) du piston (7) est annulaire. 5. Device (1) according to any one of claims 1 to 4, wherein said external surface (32) of the piston (7) is annular.
6. Dispositif (1) selon l'une quelconque des revendications ! à 5, dans lequel le capteur (33) et le piston (7) sont fixés l'un à l'autre à l'aide d'un cordon de soudure configuré pour délimiter la chambre (41). 6. Device (1) according to any one of the claims! to 5, in which the sensor (33) and the piston (7) are fixed to each other using a weld bead configured to delimit the chamber (41).
7. Dispositif (1) selon l'une quelconque des revendications ! à 6, dans lequel le piston (7) comprend un orifice (83) configuré pour recevoir un ou plusieurs câbles destinés à raccorder le capteur (33) à un module de traitement et/ou d'analyse de données de mesure. 7. Device (1) according to any one of the claims! to 6, in which the piston (7) comprises an orifice (83) configured to receive one or more cables intended to connect the sensor (33) to a module for processing and/or analyzing measurement data.
8. Dispositif (1) selon l'une quelconque des revendications ! à 7, dans lequel le capteur (33) comprend d'une part un corps formant ladite surface externe (71) du capteur (33) et d'autre part un ou plusieurs instruments de mesure reliés au corps du capteur (33). 8. Device (1) according to any one of the claims! to 7, in which the sensor (33) comprises on the one hand a body forming said external surface (71) of the sensor (33) and on the other hand one or more measuring instruments connected to the body of the sensor (33).
9. Dispositif (1) selon la revendication s, dans lequel le corps du capteur (33) comprend une cavité recevant le ou les instruments de mesure. 9. Device (1) according to claim s, wherein the body of the sensor (33) comprises a cavity receiving the measuring instrument(s).
10. Dispositif (1) selon la revendication s ou 9, dans lequel les instruments de mesure comprennent un transducteur de pression, tel qu'une jauge de déformation, et/ou un détecteur de température, tel qu'une sonde à résistance de platine. 10. Device (1) according to claim s or 9, wherein the measuring instruments comprise a pressure transducer, such as a strain gauge, and/or a temperature detector, such as a platinum resistance probe .
11. Dispositif (1) selon l'une quelconque des revendications 1 à 10, dans lequel le piston (7) a un diamètre compris entre 1 mm et 100 mm, de préférence inférieur à 50 mm, plus préférentiellement inférieur à 30 mm, par exemple égal à 25 mm et/ou dans lequel le capteur (33) a un diamètre compris entre 1 mm et 100 mm, de préférence inférieur à 50 mm, plus préférentiellement inférieur à 20 mm, par exemple égal à 12 mm. 11. Device (1) according to any one of claims 1 to 10, in which the piston (7) has a diameter of between 1 mm and 100 mm, preferably less than 50 mm, more preferably less than 30 mm, for example example equal to 25 mm and/or in which the sensor (33) has a diameter of between 1 mm and 100 mm, preferably less than 50 mm, more preferably less than 20 mm, for example equal to 12 mm.
12. Dispositif (1) selon l'une quelconque des revendications ! à 11, destiné à la caractérisation thermodynamique d'un fluide contenu dans la chambre (41), le capteur (33) étant configuré pour mesurer la pression et/ou la température du fluide reçu dans la chambre (41). 12. Device (1) according to any one of the claims! to 11, intended for the thermodynamic characterization of a fluid contained in the chamber (41), the sensor (33) being configured to measure the pressure and/or temperature of the fluid received in the chamber (41).
13. Procédé d'assemblage d'un dispositif (1) selon l'une quelconque des revendications 1 à 12, comprenant une insertion du capteur (33) dans un logement formé par le piston (7). 13. Method of assembling a device (1) according to any one of claims 1 to 12, comprising inserting the sensor (33) into a housing formed by the piston (7).
14. Procédé selon la revendication 13, comprenant une fixation du capteur (33) au piston (7), de préférence par soudage laser. 14. Method according to claim 13, comprising fixing the sensor (33) to the piston (7), preferably by laser welding.
15. Procédé selon la revendication 13 ou 14, pour assembler un dispositif (1) incluant les caractéristiques de la revendication 8, comprenant une fixation du ou des instruments de mesure au corps du capteur (33), de préférence par collage. 15. Method according to claim 13 or 14, for assembling a device (1) including the characteristics of claim 8, comprising fixing the measuring instrument(s) to the body of the sensor (33), preferably by gluing.
PCT/FR2022/052147 2022-11-22 2022-11-22 Piston housing a temperature and/or pressure sensor for a thermodynamic characterisation device WO2024110699A1 (en)

Priority Applications (1)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5747674A (en) * 1994-09-09 1998-05-05 Institut Francais Du Petrole Device for performing thermodynamic measurements on multiphase fluids at very high pressures and temperatures
WO2012025840A2 (en) * 2010-08-26 2012-03-01 Schlumberger Canada Limited Apparatus and method for phase equilibrium with in-situ sensing
FR3001546A1 (en) 2013-01-29 2014-08-01 Jose Sanchez Cell for thermodynamic characterization of pressurized fluids e.g. oil, has motorization unit with motor for moving support according to transmission ratios, and play take-up spring adjusting transmission ratios by applying load to support
RU209441U1 (en) * 2021-09-24 2022-03-16 Публичное акционерное общество "Газпром" Universal cell of phase equilibria

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5747674A (en) * 1994-09-09 1998-05-05 Institut Francais Du Petrole Device for performing thermodynamic measurements on multiphase fluids at very high pressures and temperatures
WO2012025840A2 (en) * 2010-08-26 2012-03-01 Schlumberger Canada Limited Apparatus and method for phase equilibrium with in-situ sensing
FR3001546A1 (en) 2013-01-29 2014-08-01 Jose Sanchez Cell for thermodynamic characterization of pressurized fluids e.g. oil, has motorization unit with motor for moving support according to transmission ratios, and play take-up spring adjusting transmission ratios by applying load to support
RU209441U1 (en) * 2021-09-24 2022-03-16 Публичное акционерное общество "Газпром" Universal cell of phase equilibria

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