Downhole piezoelectric devices.

(54) Title: PIEZOELECTRIC DEVICES FOR THE DRILLING FUND. (54) Title: DOWNHOLE PIEZOELECTRIC DEVICES.

(57) Summary

In accordance with one or more aspects of the present description, a plezoelectric pump can include a hydraulic fluid path between a low pressure source and a high pressure tool port; a fluid disposed in the hydraulic fluid path; a piston or plunger in communication with the fluid; and a plezoelectric material connected to the piston even to pump the fluid through the high pressure tool port.

(57) Abstract

According to one or more aspects of the present dlsclosure, a plezoelectrlc pump may ¡nclude a hydraullc fluid path between a low pressure source and a high pressure tool port; a fluid dlsposed in the hydraullc fluid path; a piston in communlcatlon with the fluid; and a plezoelectrlc material connected to the pistón to pump the fluid through the high pressure tool port.

PIEZOELECTRIC POSITIVES FOR THE PERFORACIOUS FUND

FIELD AND BACKGROUND OF THE INVENTION

Because more and more equipment is used

Light for the bottom of the drilling or well in rough ante of the oil field such as temperature and high pressure conditions, establish a sea

Lens to activate a device in the prayer fund becomes more and more valuable. A mechanical actuator, such as a solenoid, needs to be acti'v a ca Significant amount of electrical energy. In addition to the electro-mechanical actuator it needs to maintain; ion, a significant amount of enex is used to maintain the electric field.

In downhole equipment, the pressure may be needed to move the pistons, which operate the valves, plugs and caps.

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j _ -i __a _ .on differential by means of an electric pump, a significant amount of enei is necessary to keep the pump running. However, the electrical capacitance at the bottom of the borehole falls in the rough environment.

BRIEF DESCRIPTION OF THE INVENTION

A piezoelectric device according to one or: of the present disclosure may include a validity between a high pressure source and a pressure source; a member in connection with the valve; and? ial piezoelectric connected to the member, where: ial piezoelectric The valve is actuated when powered: The device may also include a pressure passage between the low pressure source and the piezo stream. The high pressure and / or low pressure source may include an accumulator.

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Icación ication with the fluid; and a piezoelectric material: piston to pump the fluid through the high pressure tool. The pump may include pressure communication between the electrical equipment and the lower pressure source.

A check valve can be positioned on hydraulic fluid jacks. The check valve i include a piezoelectric valve member. The piezoelectric valve mien may comprise an electrical material connected to a resilient member.

In accordance with one or more aspects of preselection, the piezoelectric pump may comprise a check valve connected in the path between the fu low pressure entity and the piston, the retention principle that allows fluid flow from one and the low pressure source; and a second valve connected in the fluid path between a valve member positioned to allow permanent flow through the fluid path of the valve member comprises a electrical matex connected to a resilient member.

The foregoing has outlined some of the technical characteristics of various modalities so that the detailed description that follows, may be better understood, and now advantages and characteristics of various modalities will be described, which form part of the present claims.

BRIEF DESCRIPTION OF THE DRAWINGS The present disclosure is better understood from this detailed description when read with the following figures. It is emphasized that, in accordance with industry practice, various features are not drawn. In fact, the dimensions of v Characteristic arias

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~ Ί ~ ^ electrical in accordance with one or more aspects of inte disclosure.

Figure 3A is a schematic view of one or> piezoelectric devices according to one or more aspee and present disclosure arranged in a well.

Figures 4 and 5 are schematic views of an electric valve according to one or more aspects of the disclosure.

Figure 6 is a schematic view of a piezoelectric member according to one or more aspects of inter disclosure.

DETAILED DESCRIPTION OF THE INVENTION

In the following description, numerals are established to provide an understanding of the characteristics of the characteristics. However, it was understood those experts in the art that can be practiced __J J _

; n use in combination with various tools; or for drilling bottom. Examples of some> and devices on which Piezoelectric devices of the present disclosure may be used with one or more aspects of the present disclosure in US Patent Nos. 7,464.7 \ 850; 7,331,398; 6,354,374; 6,244,351; 6,213,203;

!, 518 which are hereby incorporated by reference, the above slow-moving ones provide examples of limited ro of examples in which more than the piezoelectric devices of the presegation may be used.

Figure 1 is a schematic diagram of an electric drive for the bottom of the bore according to or more aspects of the present disclosure generally referred to by number 10. Actuator 10 is a mechanical drive to operate a tool for the bottom a second chamber 18 separated by a first piezoelectric piston 22 is arranged in the first chamber. The piezoelectric material 22 is in connection with the electrical 24. Piezoelectric material 22 responds to a voltage spike from source 24 in ra known to provide a force like here ribe. Electrical source 24 can be positioned on or off device 10, such as on the surface: A fluid 26 (eg, gas or liquid) is disposed 18 in the illustrated embodiment. In the modality

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Figure 1, fluid 26 is hydraulic oil. The actuator 2 Figure 1 includes a second piston 28, which is in the second cylinder 14. The second piston 28 ti surface 28a that communicates with the second cylinder 14. surface (for example, the diameter) of the surface smaller than that of the first piston 20. The amplifier learns a first piston 10 and a second piston 28 in high pressure port 34 is in communication with high pressure 4. The low pressure source 2 and: high pressure e 4 can be provided by ilators 2, 4, respectively, as depicted in ra 1. In some embodiments, the low and / or high pressure is not provided from the well surface and / or by lotion or probe. Pressure sources 2 and 4 are known to valve 36 having a valve member 38 at 'as 1 and 2. A passageway 35 (eg, a conduit, line, etc.) provides pressure communication between the chamber 16 of the first cylinder 12 and the pressure port 32 to balance or balance the pressure to the piezoelectric side 22.

Member 30 is oriented to actuate the valve; valve member 38 is oriented. In the static illustration of Figure 1, member 30 is illustrated with

Directly tapping a valve member 38 (

High pressure. The second chamber 18, which contains the fluid, is at substantially the same pressure as the pressure port. Communication passage 35 allows .on to swing through piezoelectric material 22. Seals 64 can provide a barrier to fluid in fluid 26 and piezoelectric material 22.

Piezoelectric material 22 responds to the application) electric voltage from the source 24 to extend the energization, the ac 22 piezoelectric material; the first piston 20 pushing it against the fluid 26 second chamber 18 which is pushed against the surface of the second piston 28. The areas of the first piston 20 and the smallest piston 28 can be selected from rr the stroke length induced by the electrical material is amplified as needed for: private action. The smallest piston 28 moves> ro 30 acting on the valve member 38 for hydraulic and rich openers, sampling tools, and relays.

As previously noted, apparatus 10 may not include a stroke amplifier or may include an amplifier other than that shown. Other indicators can be used, including without limitation articulated levers. The figure. 2 illustrates an example of an alternative career marker. In Example 2, amp 5 includes a bellows 42 that replaces first piston 20, second piston 28, and fluid 26. Le 42 i A first communicating surface 44 includes piezoelectric material 22 and / or the first chamber 1 second surface 46 facing valve 36. Surface 44 has a larger diameter than the next surface 46.

In another aspect of the disclosure, the electrical material is used as a source of electrical pressure disposed in a piezoelectric chamber 16 (), the first chamber) of a first cylinder 12. May be referred to as a housing. The electrical material is separated (eg, isolated) from a fluid (eg the hydraulic fluid) by means of the piston. Fluid 26 is arranged in a path shown in Figure 3 as flow cylinder 14, flow 58, chamber 18 and path 62). The fluid path is provided from the high pressure port in cylinder 14 to the high pressure port 34. The low-pressure source shown in Figure 3 includes cylinder 14 with fluid 26 and pressure source 2 (for e jemp transfer of the borehole, the formation pressure) that actuated the piston 64 against the fluid 26. The bón port 32 may also be in communication with a .on source such as an accumulator and / or hydraulic line. A country

The portion can be positioned in the flow ictory portion 58 between the pistons 52 and 54. A retention line 60 is positioned in the fluid flow ictory portion 62 between the tool port 34 of the tool for the bottom of the bore (), valve, plug, etc.) and followed to 18.

An example of operation is now described with reference to pump 50 represented in Figure 3. When the electrical material is not energized, the valve 56 is opened by means of pressure source 2 (), the reservoir pressure) acting on the step on fluid 26. The second check valve 60 ra when the piezoelectric material 22 has not been lifted. The pressure through the material 22 piezoelectric balance average The communication provided between the low pressure (eg, the borehole pressure, portion 62 of the flow path of the fluid path, opening the check valve 60, and ejecting tool port 34. The Retention at this stage, energizing and de-energizing the 22 piezoelectric, the tool pressure i infuse greater than the reservoir pressure.

Figure 3A schematically illustrates the electric pump in connection with a drilling tool 100a for) according to one or more aspects of this disclosure. In this example, tool 1 the bottom of the bore is an inflated shutter in a tubular string 102. The string 102 is arranged in well 104. In the example shown, the electric pump can be used to apply the necessary pressure to activate the. shutter 100a to the wall 106 (for example, the casing, ition) of the well 104. A controller 108 is represented as a flow or Formation isolation valve.

Limit 100b for the bottom of the bore may be reacted in response to the pressure differential provided by Lcion of the piezoelectric actuator 10. Although not specifically, a piezoelectric actuator 10 and a piezoelectric actuator 50 may be in connection with a seal for the bottom of the bore.

As described with reference to Figure 3, the check lines 56 and 60 may be flow role devices such as one-way valves. In some, the check valves 56 and / or 60 may render a contemporary type check valve, in both modalities, the check valves 56 and / or 60 comprise a piezoelectric valve such as in Figures 4 and 5 or may include a member 76 ila as illustrated in Figure 6.

Figures 4 and 5 are schematic illustrations of * thus a piezoelectric material 22 connected to a resilient member, such as a rubber, elastomer, etc., maner aa layers. The piezoelectric member 22 is: ion with an electrical source 24.

Flow path 74 depicted in the Figures is divided into different portions 74a and 74b separating valve member 76. The portion 74b can render multiple conduits and / or a circular conduit lleno a filled center as depicted in Figures 4 and flow path can be formed in various ways by exerting the desired flow capacity, flow characteristics, and so on. Valve member 76 can be connected in various ways. For example, in Fig

The valve member 76 is illustrated as being connected from a bolt 80 to housing 74.

Referring to Figures 4 and 5, a method of operating valve 70 in accordance with one or more aspects is described; valve 70 applies an electrical voltage,) via the electrical source 24, to the electrical material. When the electrical material is energized> it acts on the resilient material 78 causing it to buckle and open the fluid path between .ones 74a and 74b. By controlling the electrical voltage, the movement of member 76 can be controlled thereby controlling the area of ​​fluid flow through flow path 74.

Figure 6 is a schematic illustration of a valve valve according to one or more aspects of preselection. In the embodiment shown, the electrical material does not extend along the diameter, inference from the resilient member 78.

Many hydraulic circuits require a pilot valve between the solenoid and the tool valves to achieve speed with contemporary solenoids and the like.

Although specific features have been described here in some detail, this has been done only for the purposes of describing various aspects and characteristics of the invention, and is not intended to be limiting with respect to any related claims herein. It is contemplated that various substitutions, alter The encodings, including but not limited to, those implementation implementations that may have been made here, may be performed to the described modalities departing from the spirit and scope as defined by the accompanying accompanying indications.