• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a well stimulation device (20) comprising a tool (200) comprising a capacitive element (205) and a stimulation head (210), said device being characterized in that it comprises adapted switching means placing the tool (200) in at least two states: i) a state of charge in which the capacitive element and the stimulation head are electrically in series between the first terminal and the second terminal of the tool, so that the electrical source charges the capacitive element through the stimulation head (210), and ii) a discharge state in which the capacitive element discharges through the stimulation head (210). The present invention also relates to a method for diagnosing such a device (20) for stimulating wells.
    公开号:FR3015549A1
    申请号:FR1363230
    申请日:2013-12-20
    公开日:2015-06-26
    发明作者:Michael Delchambre；Salvador Moncho；Xavier Horsot
    申请人:Ene29 SARL；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD The present invention relates to an electrical well stimulation device and a method for diagnosing such a stimulation device. By "well stimulation" is meant to generate an acoustic shock wave in a natural well or borehole. A well stimulation notably makes it possible to improve the production of an underground resource extraction well (oil, natural gas, water, etc.), to carry out a seismological study by measuring the acoustic wave (for example by means of surface acoustic sensor), fracturing of underground rock, etc. STATE OF THE ART It is known, in the field of well stimulation, to use a device comprising an elongated tool adapted to be inserted in a well obtained by drilling. Such stimulation devices are known for example from: - US Pat. No. 4,345,650, which describes a stimulation device implemented to improve the production of an underground resource extraction well, - of the international patent application WO9013830, which describes a stimulation device used to carry out a seismological study, - patent US4479680, which describes a stimulation device used to perform fracturing of underground rock. FIG. 1 represents a circuit diagram of an exemplary stimulation device 10 comprising a tool 100 according to the prior art.
    [0002] As illustrated in FIG. 1, the tool 100 comprises a stimulation head 110 in the form of a closed cavity 113 into which a first electrode 111 and a second electrode 112 open. The first electrode 111 and the second electrode 112 are separated by water confined within said cavity 113.
    [0003] The first electrode 111 and the second electrode 112 are respectively connected to a first terminal 101 and a second terminal 102 of the tool 100, outside the cavity 113 of the stimulation head 110. The tool 100 also comprises a set of capacitive elements 105 which are electrically connected in parallel with each other and with the stimulation head 110. The tool 100 illustrated in FIG. 1 also comprises a spark gap 106 arranged between the capacitive elements 105 and the stimulation head 110. The spark gap 106 mainly comprises two states: an open state in which the capacitive elements 105 are disconnected from the stimulation head 110, so that no electric current can flow between said capacitive elements 105 and said stimulation head 110, a closed state in which the capacitive elements 105 are connected to the stimulation head 110, so that an electric current can circulate between the said s capacitive elements 105 and said stimulation head 110. Thus, by connecting an electrical source 120 to the first terminal 101 and the second terminal 102 of the tool 100, the capacitive elements 105 are charged when the spark gap 106 is in the state open, until a predetermined voltage across all of said capacitive elements 105. The spark gap 106 then goes into the closed state, and the voltage across the capacitive elements is applied to the stimulation head 110 The capacitive elements 105 are discharged, through the stimulation head, by circulating a current pulse of high intensity (which may exceed a hundred kilo-amperes) in the fluid separating the first electrode 111 from the second electrode 112. This high intensity current pulse creates an acoustic shock wave that propagates in the well, for example via a flexible wall of the cavity 113. The acoustic shock may, in particular, make it possible to improve the production of an underground resource extraction well, to carry out a seismological study, to carry out an underground rock fracturing, etc. In well stimulation operations, the tool 100 is inserted into said well with the stimulation head 110 down, and down to the point where the stimulation is to be performed. Once the stimulation point is reached, the well can be stimulated by successive charges / discharges of the capacitive elements 105. However, a disadvantage of the current stimulation devices lies in the fact that no control of the state of the stimulation head is not possible when the tool is at the bottom of the well. SUMMARY OF THE INVENTION The present invention aims to provide an alternative architecture for a well stimulation device tool.
    [0004] In addition, the present invention also aims to provide an architecture that allows to determine the state of the stimulation head when the tool is at the bottom of the well. For this purpose, and according to a first aspect, the present invention relates to a well stimulation device comprising an electrical source connected to a first terminal and a second terminal of a tool, said tool comprising a capacitive element and a stimulation head. said stimulation head comprising a cavity within which are arranged a first electrode and a second electrode separated by a fluid. The device further comprises switching means adapted to place the tool in at least two states: a state of charge in which a first terminal of the capacitive element is connected to the first terminal of the tool and disconnected from the second electrode, and wherein a second terminal of the capacitive element is connected to the first electrode, so that the capacitive element and the stimulation head being electrically in series between the first terminal and the second terminal of the tool the electrical source charges the capacitive element through the stimulation head, - a discharge state in which the first terminal of the capacitive element is connected to the second electrode, and wherein the second terminal of the capacitive element is connected to the first electrode, so that the capacitive element discharges through the stimulation head. Thus, the stimulation device according to the invention differs in particular from known devices in that the capacitive element is charged in series with the stimulation head. Thus, it is possible with the stimulation device according to the invention to diagnose the state of the stimulation head. Indeed, in case of deterioration of the stimulation head, for example in case of tearing of a flexible wall of the cavity, external elements mix with the fluid and change the electrical properties. Since the capacitive element is charged in series with the stimulation head, an electric current flows in said stimulation head during charging of the capacitive element, so that it is possible to detect a modification of the electrical properties fluid inside the cavity. In particular embodiments, the well stimulation device may include one or more of the following features, taken alone or in any technically possible combination.
    [0005] In particular embodiments, the stimulation device comprises diagnostic means adapted to determine a state of the stimulation head according to a parameter representative of the resistance of the stimulation head. In particular embodiments, the electrical source is a current source, preferably a source adapted to provide a current of constant intensity during charging of the capacitive element or elements. In particular embodiments, the stimulation device comprises an electrically resistive element in parallel with the stimulation head and, in the state of charge, in series with the capacitive element.
    [0006] Such arrangements make it possible, in the event of deterioration of the stimulation head, such as tearing of the flexible wall of the cavity, to ensure a minimum intensity of the discharge current of the capacitive element, where appropriate by the intermediate of the resistive element. Indeed, in case of deterioration, the resistance of the stimulation head can increase sharply, but the equivalent resistance is still lower than the resistance of the resistive element. Therefore, the capacitive element can still be discharged at least through the resistive element, so that the risk of returning to the surface a tool whose capacitive element would not be completely discharged is greatly reduced. The safety of the operators handling the tool is thus improved. In particular embodiments, the resistive element is of resistance at least two times greater than the theoretical resistance of the fluid separating the first electrode from the second electrode.
    [0007] In particular embodiments, the electrical source being a source of current Ic and the transition from the state of charge to the discharge state being performed when the voltage between the first terminal of the capacitive element and the second electrode of the stimulation head reaches an upper limit value Vo predefined, the resistive element is of resistance Rs such that the voltage Rs.lc is lower than Vo. In particular embodiments, the switching means comprise a spark gap arranged between the first terminal of the capacitive element and the second electrode.
    [0008] According to a second aspect, the present invention relates to a method for diagnosing an electric well stimulation device according to any one of the embodiments of the invention, comprising steps of: determining a parameter representative of the resistance of the stimulation head, - determining a state of the stimulation head according to said parameter. In particular embodiments, the determination of the parameter corresponds to a measurement of the power supplied to the tool by the electrical source and / or a measurement of the time required to obtain a predetermined value of voltage between the first terminal of the capacitive element and the second electrode of the stimulation head. PRESENTATION OF THE FIGURES The invention will be better understood on reading the following description, given by way of non-limiting example, and with reference to the figures which show: FIG. 1: already described, an electrical diagram of an example embodiment of a well stimulation device according to the prior art, FIG. 2: a half-sectional view of a stimulation device in position in a well, FIGS. 3 and 4: electrical diagrams of variants of embodiment of stimulation devices according to the invention, FIG. 5: time diagrams representing an exemplary implementation of a diagnostic method of a stimulation head of a stimulation device according to the invention. In these figures, identical references from one figure to another designate identical or similar elements. For the sake of clarity, the elements shown are not to scale unless otherwise stated. DETAILED DESCRIPTION OF EMBODIMENTS FIG. 2 diagrammatically represents an exemplary implementation of a well stimulation device 20 according to the invention.
    [0009] In the remainder of the description, reference is made in the non-limitative manner to a stimulation device used to improve the production of an underground resource extraction well. However, and as previously indicated, the term "well stimulation" generally means generating an acoustic shock wave in a natural well or borehole. Such well stimulation can be implemented to improve the production of an underground resource extraction well, but also to carry out a seismological study, to perform an underground rock fracturing, etc. As illustrated in FIG. 2, the stimulation device 20 comprises a tool 200, of elongated shape, adapted to be introduced into a well extraction obtained by drilling. In particular embodiments, the tool 200 may be formed by a plurality of sections assembled end to end in a reversible manner. More particularly, Figure 2 shows a half-sectional view of the tool 200, wherein the two ends of said tool 200 are shown in section. The tool 200 comprises in particular, at a first end, a stimulation head 210, introduced downwards into the extraction well 30, and a second end opposite to said stimulation head 210.
    [0010] The stimulation head 210 has a cavity 213 closed within which a first electrode 211 and a second electrode 212 open. The first electrode 211 and the second electrode 212 are separated by a fluid 214 confined inside the cavity. 213. The cavity 213 is closed in particular by a flexible wall 215 separating the fluid 214, inside said cavity 213, and the underground resource, outside said cavity. The fluid 214 is electrically conductive and may be considered as a resistive element. Said fluid is for example a liquid such as water, resistance of the order of 1000 ohm. Nothing prevents, according to other examples, having a stimulation head 210 with an open cavity, in which case the fluid is the fluid contained in the bottom of the well. In the remainder of the description, it is placed in the case where the cavity 213 is closed. The theoretical value of the resistance of the fluid 214, that is to say the resistance of said fluid in the absence of deterioration of the stimulation head 210, is hereinafter referred to as RF. The tool 200 also comprises, for example at the second end, a first terminal 201 and a second terminal 202. The first terminal 201 is connected to the first electrode 211 via a first circuit 203, and the second terminal 202 is connected to the second electrode 212 via a second circuit 204. In the nonlimiting example illustrated in FIG. 3, the first circuit 203, for example a brass rod, corresponds to a central core of the tool 200, while the second circuit 204, for example made of steel, corresponds to a peripheral wall of the tool 200. The first circuit 203 and the second circuit 204 are preferably separated by a layer 207 of electrically insulating material surrounding the first circuit 203 except areas in which said first circuit 203 and said second circuit 204 are connected by electrical components discussed below. The stimulation device 20 comprises an electrical source 220 connected to the first terminal 201 and to the second terminal 202 of the tool 200. In the remainder of the description, reference is made to the case where the electrical source 220 is a source of constant intensity current Ic. This example is not limiting and, according to other examples, the electrical source can be a variable intensity current source over time, a voltage source, etc.
    [0011] In the nonlimiting example illustrated in FIG. 2, the electrical source 220 is external to the tool 200 and is connected to the first terminal 201 and to the second terminal 202 via an electric cable. Nothing prevents, according to other embodiments, having for example a power source 220 integrated in the tool 200. According to other embodiments, the electrical source 220 may also be partly only external to the power supply. 200, being distributed in two parts connected by an electric cable: a first portion external to the tool 200 and a second portion integrated in the tool 200 and connected to the first terminal 201 and the second terminal 202 of said tool 200. For example, the first portion of the electrical source 220 is a constant voltage source, while the second portion is a converter adapted to provide a current of intensity constant to the tool 200 from the constant voltage received of the first part of the electrical source 220. FIG. 3 represents a circuit diagram of the main electrical components of a particular embodiment of the tool 200. For the sake of clarity the arrangement of said electrical components, for example the arrangement of the first circuit 203 as the central core of the tool 200 and the arrangement of the second circuit 204 as the peripheral wall of said tool 200, is not taken FIG. 3. As shown in FIG. 3, the first circuit 203 of the tool 200 includes a capacitive element 205. The stimulation device 20 further comprises switching means adapted to place the tool 200. in at least two states: a state of charge in which a first terminal of the capacitive element 205 is connected to the first terminal 201 of the tool 200 and disconnected from the second electrode 212, and in which a second terminal of the capacitive element is connected to the first electrode 211, - a discharge state in which the first terminal of the capacitive element 205 is connected to the second electrode 212, and wherein the second terminal of the capacitive element 205 is connected to to the first electrode 211.
    [0012] In the nonlimiting example illustrated in FIG. 3, the first terminal of the capacitive element 205 is connected directly to the first terminal 201 of the tool 200, and the second terminal of the capacitive element 205 is connected directly to the first electrode 211 of the stimulation head 210. The term "connected to" means that an electric current can flow between the elements considered. By "directly connected to" is meant that the considered elements are connected without intermediate electrical component. In addition, the switching means comprise a switch 206 connected on the one hand to a point of the first circuit 203 located between the first terminal 201 of the tool 200 and the capacitive element 205 and, on the other hand, a point of the second circuit 204 located between the second terminal 202 of the tool 200 and the second electrode 212 of the stimulation head 210. The switch 206 conventionally comprises an open state, in which no electric current flows between the terminals of said switch 206 , and a closed state in which an electric current can flow between said terminals of said switch 206. When the electrical source 220 is connected to the first terminal 201 and the second terminal 202 of the tool 200, it is therefore understood that: - when the switch 206 is in the open state: the capacitive element 205 and the stimulation head 210 are electrically in series between the first terminal 201 and the second terminal 202 of the tool 200, so that said electrical source 220 charges the capacitive element 205 through the stimulation head 210, when the switch 206 is in the closed state: the capacitive element 205 discharges through the stimulation head 210. the open state in the closed state is for example performed when a predefined discharge condition is obtained. For example, said predefined condition is obtained when the voltage across the switch 206 or the capacitive element 205 reaches a predefined upper limit value. In such a case, the switch 206 is advantageously a spark gap whose breakdown voltage is chosen equal to said predetermined upper limit value, so that the spark gap automatically switches to the closed state as soon as the voltage at its terminals reaches said value. upper limit. Other exemplary embodiments are however possible. According to other non-limiting examples, the stimulation device 20 may comprise a control module which controls the switch 206 as a function of measurements of the voltage across said switch 206 or the terminals of the capacitive element 205. As indicated previously, in the state of charge, the electrical source 220 charges the capacitive element 205 through the stimulation head 210. Because the electrical source 220 supplies in the example in question a current of constant intensity Ic, the voltage at the terminals of the capacitive element 205 increases linearly, while the voltage between the first electrode 211 and the second electrode 212 is substantially constant, equal to RF.Ic. For example, the discharge of the capacitive element 205 is triggered when the voltage across the switch 206 reaches a predefined upper limit value Vo, which corresponds to a voltage V1 across the capacitive element 205 equal to: V1 = Vo - RF'IC During the discharge, the discharge current flowing between the first electrode 211 and the second electrode 212 is therefore of intensity ID equal to V1 / RF. The different electrical components of the stimulation device 20 are preferably configured so that the intensity ID is of the order of a few tens of kiloamperes to a few hundred kiloamperes. The circulation of such a discharge current causes an acoustic shock wave inside the cavity 213, which propagates in the extraction well 30, in particular through the flexible wall 215. FIG. 4 shows a preferred embodiment of the tool 200 of FIG. 3, in which the tool 200 further comprises a resistive element 216 mounted in parallel with the stimulation head 210, between a point of the first circuit 203 situated between the capacitive element 205 and the first electrode 211, and a point of the second circuit 204 located between the second electrode 212 and the switch 206. The resistive element 216 is of resistance Rs at least twice greater than the theoretical value RF of the resistance of the fluid 214 separating the first electrode 211 from the second electrode 212.
    [0013] Since the resistance Rs of the resistive element 216 is at least two times greater than the theoretical value RF of the resistance of the fluid 214, it is ensured that, in the absence of deterioration, the charging current and the discharge current of the capacitive element 205 circulate mainly via the fluid 214. In preferred embodiments, the resistor Rs of the resistive element 216 is at least ten times, or at least one hundred times greater than said theoretical value RF of the resistance of the fluid 214. Thus, the intensity of the current flowing in the resistive element 216 is significantly lower than the intensity of the current flowing in the stimulation head 210. The resistive element 216 makes it possible to ensure that the intensity the discharge current of the capacitive element 205 is always greater than a predefined lower limit value, even in case of deterioration of the stimulation head. Indeed, in the case for example of a tear of the flexible wall 215, external elements, coming from the extraction well, can be introduced into the cavity 213 and modify the resistance of the fluid 214. Typically, the resistance of the The fluid 214 can increase until it reaches a value Rz significantly greater than the theoretical value RF. In such a case, the discharge of the capacitive element 205 is much slower or impossible. Thanks to the resistive element 216 connected in parallel with the stimulation head 210, the equivalent resistance of the assembly constituted by said resistive element 216 and the stimulation head 210 is therefore always less than Rs, so that the capacitive element 205 can still be discharged. As indicated above, the capacitive element 205 of the tool 200 is charged in series with the stimulation head 210. Therefore, during charging, an electric current flows in said stimulation head 210, between the first electrode 211 and the second electrode 212. In this way, any modification of the electrical properties of the stimulation head 210, and more particularly of the resistance of the fluid 214 (transition from the theoretical value RF to the value Rz), can in principle be detected by observing a parameter representative of said resistance of said fluid 214. The analysis of said parameter when the tool 200 is in the state of charge thus makes it possible to determine a state of the stimulation head 210, for example to detect an abnormal behavior susceptible of be caused by a tear of the flexible wall 215 of the cavity 213. Preferably, the observed parameter is the power supplied to the tool 200 by the electrical source. The observation of the power is advantageous, in the case of an electrical source 220 at least partly external to the tool 200, insofar as it can be carried out at a distance from the tool 200 (in surface), without having to add a dedicated voltage and / or current sensor in said tool 200. FIG. 5 schematically shows the time behavior of the power supplied by the electrical source 220 to the tool 200, in the case 20 of the stimulation device illustrated in FIG. 4, and in the case where the transition from the state of charge to the state of discharge is carried out when the voltage across the switch 206 reaches a predefined upper limit value Vo (or in an equivalent way: the power supplied by the electrical source reaches an upper limit value Voic). In addition, the theoretical value RF of the resistance of the fluid is much lower than the resistance Rs of the resistive element 216, and in the case where the value Rz of the resistance of the fluid in case of deterioration is much higher than the resistance Rs of said resistive element. Therefore, in the absence of deterioration, the equivalent resistance of the assembly constituted by the resistive element 216 and the stimulation head 210 is substantially equal to RF, while it is substantially equal to Rs in case of deterioration. Part a) of Figure 5 corresponds to the case where the stimulation head 210 is not deteriorated. The power dissipated in the assembly constituted by the stimulation head 210 and the resistive element 216, during the charging, is therefore equal to RF.Ic2, and is considered negligible compared to the power Voic. In part a) of FIG. 5, the charge of the capacitive element 205 starts at the instant To. At this instant, the power supplied to the capacitive element 205 is substantially zero, as is the power supplied to the head. 210. The power supplied by the electrical source 220 then increases gradually until at a time T1, the power Vo-Ic for which the switch 206 passes from the open state to the closed state. The capacitive element 205 then discharges almost instantaneously through the stimulation head 210.
    [0014] Part b) of FIG. 5 corresponds to the case where the stimulation head 210 is deteriorated, so that the stimulation head 210 has a resistance Rz that is much greater than the resistor Rs resistor 216. The power dissipated in FIG. the set constituted by the stimulation head 210 and the resistive element 216, during the charging, is therefore equal to Rs.1c2, and is not negligible compared to the Voic power. In part b) of FIG. 5, the charge of the capacitive element 205 starts at the instant To. At this instant, the power supplied to the capacitive element 205 is substantially zero, and the electrical source 220 must provide a Rs.1c2 power to the resistive element 216. The power supplied by the electrical source 220 then increases gradually until at a time T'1, the power Vo-Ic for which the switch 206 passes from the open state to the closed state. The capacitive element 205 then discharges through the resistive element 216, more slowly than in part a) of FIG. 5. It is therefore clear that observation of the power supplied by the electrical source 220 makes it possible to determine the state of the stimulation head 210. For example, if at the beginning of the charge, at the instant To, the power supplied increases suddenly (part b), the stimulation head is probably deteriorated. Such a sudden increase in the power supplied can also be detected when the resistor Rs of the resistive element 216 is at least twice greater than the theoretical value RF. In addition, it is found that the charging time (T'i - To) in case of deterioration is less than the charging time (Ti - To) in the absence of deterioration. Therefore, it is also possible to determine the state of the stimulation head 210 by comparing the actual charging time to a predefined reference time. It should be noted that the determination of the state of the stimulation head 210 is also possible in the case of the stimulation device 20 of FIG. 3. In fact, in the event of deterioration, the stimulation head 210 is then of resistance. RZ. Therefore, at the instant To, the power supplied would theoretically be equal to RZ-1c2 instead of RF.Ic2, so that the state of the stimulation head 210 can be determined analogously as a function of the power provided at time To, or depending on the charging time. However, the power Rz.1c2 can be very high and lead to a deterioration of some electronic components. In addition, the power Rz.1c2 may be greater than the power Voic, which makes any charging of the capacitive element impossible. The presence of the resistive element 216, in particular resistor Rs such that the power Rs.1c2 is lower than the power Vo-Ic (or equivalently such that the voltage Rs.lc is lower than the voltage Vo), as this is the case in FIG. 5, makes it possible to avoid any deterioration of the electronic components and any blocking of the tool 200. It should also be noted that the determination of the state of the stimulation head 210 is possible in the case where the cavity 213 is open, since a theoretical value RF of the fluid contained in the bottom of the well is known. Indeed, it will then be possible to detect any variation in the resistance of the fluid at the bottom of the well with respect to said theoretical value RF, linked for example to the mixing of external elements with said fluid following the generation of a shock wave acoustic. More generally, it should be noted that the modes of implementation and realization considered above have been described by way of non-limiting examples, and that other variants are therefore possible. In particular, the invention has been described by considering the power supplied by the electrical source 220 as a parameter observed to diagnose the state of the stimulation head 210. Other parameters representative of the resistance of the stimulation head 210 are possible. such as, for example, the voltage across the stimulating head 210 during charging, the voltage across the switch 206 during charging, the duration of said charging, etc. The above description clearly illustrates that by its different characteristics and advantages, the present invention achieves the objectives it has set for itself. In particular, a stimulation device 20 according to the invention makes it possible to control the state of the stimulation head 210 at the bottom of the extraction well 30. The state of the stimulation head 210 can be determined automatically by diagnostic means of the stimulation device, or by an operator who would observe for example the power supplied at the beginning of the charge, the duration of said charge, etc. .
    权利要求:
    Claims (4)
    [0001]
    CLAIMS1 - Well stimulation device (20) comprising an electrical source (220) connected to a first terminal (201) and a second terminal (202) of a tool (200), said tool (200) comprising a capacitive element ( 205) and a stimulation head (210), said stimulation head comprising a cavity (213) inside which are arranged a first electrode (211) and a second electrode (212) separated by a fluid (214), said device being characterized in that it comprises switching means (206) adapted to place the tool (200) in at least two states: - a state of charge in which a first terminal of the capacitive element (205) is connected to the first terminal (201) of the tool (200) and disconnected from the second electrode (212), and wherein a second terminal of the capacitive element is connected to the first electrode (211), so that , the capacitive element (205) and the stimulation head (210) are both electrically in series between the first terminal (201) and the second terminal (202) of the tool, the electrical source charges the capacitive element through the stimulation head, - a discharge state in which the first terminal of the capacitive element (205) is connected to the second electrode (212), and wherein the second terminal of the capacitive element (205) is connected to the first electrode (211), so that the capacitive element discharges at through the stimulation head (210).
    [0002]
    2 - Device (20) according to claim 1, characterized in that it comprises diagnostic means adapted to determine a state of the stimulation head (210) according to a parameter representative of the resistance of the fluid separating the first electrode (211) of the second electrode (212).
    [0003]
    3 - Device (20) according to one of the preceding claims, characterized in that the electrical source (220) is a current source.
    [0004]
    4 - Device (20) according to one of the preceding claims, characterized in that it comprises a resistive element (216) electrically in parallel with the stimulation head (210) and, in the state of charge, in series with the capacitive element (205) .Device (20) according to claim 4, characterized in that the resistive element (216) is at least twice as strong as a theoretical value RF of the resistance of the fluid separating the first electrode (211) of the second electrode (212). Device (20) according to one of Claims 4 to 5, characterized in that the electrical source (220) is a current source of intensity Ic and the transition from the state of charge to the discharge state being performed when the voltage between the first terminal of the capacitive element (205) and the second electrode (212) of the stimulation head (210) reaches a predefined upper limit value Vo, the resistive element (216) is of resistance Rs such that the voltage Rs.lc is less than Vo. Device (10) according to one of the preceding claims, characterized in that the switching means (206) comprise a spark gap arranged between the first terminal of the capacitive element (205) and the second electrode (212). Device (20) according to one of the preceding claims, characterized in that the tool (200) is formed by a plurality of sections assembled end to end reversibly. A method of diagnosis of an electrical device (20) for stimulation of 20 wells according to one of the preceding claims, characterized in that it comprises steps of: - determination of a parameter representative of the resistance of the stimulation head (210), - determining a state of the pacing head (210) according to said parameter. 10 - Process according to claim 9, characterized in that the determination of the parameter corresponds to a measurement of the power supplied by the electrical source (220) and / or a measurement of the time required to obtain a predefined voltage value between the first terminal the capacitive element (205) and the second electrode (212) of the stimulation head (210). - 5 6 - 7 - 8 - 9 -
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    同族专利:
    公开号 | 公开日
    US20170002632A1|2017-01-05|
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    WO2015091909A1|2015-06-25|
    EP3084115A1|2016-10-26|
    FR3015549B1|2019-05-10|
    CA2934422A1|2015-06-25|
    US10202827B2|2019-02-12|
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    法律状态:
    2015-12-23| PLFP| Fee payment|Year of fee payment: 3 |
    2016-12-29| PLFP| Fee payment|Year of fee payment: 4 |
    2017-12-29| PLFP| Fee payment|Year of fee payment: 5 |
    2018-12-27| PLFP| Fee payment|Year of fee payment: 6 |
    2020-10-16| ST| Notification of lapse|Effective date: 20200914 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1363230|2013-12-20|
    FR1363230A|FR3015549B1|2013-12-20|2013-12-20|WELL STIMULATION DEVICE AND METHOD FOR DIAGNOSING SUCH A STIMULATION DEVICE|FR1363230A| FR3015549B1|2013-12-20|2013-12-20|WELL STIMULATION DEVICE AND METHOD FOR DIAGNOSING SUCH A STIMULATION DEVICE|
    CA2934422A| CA2934422A1|2013-12-20|2014-12-19|Device for stimulation of wells and diagnostic method for such a stimulation device|
    EP14815732.4A| EP3084115B1|2013-12-20|2014-12-19|Device for stimulation of wells and diagnostic method for such a stimulation device|
    PCT/EP2014/078652| WO2015091909A1|2013-12-20|2014-12-19|Device for stimulation of wells and diagnostic method for such a stimulation device|
    US15/106,413| US10202827B2|2013-12-20|2014-12-19|Device for stimulation of wells and diagnostic method for such a stimulation device|
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