WO2021031572A1

WO2021031572A1 - Resistivity measurement polar plate and manufacturing method

Info

Publication number: WO2021031572A1
Application number: PCT/CN2020/083024
Authority: WO
Inventors: 廖胜军; 王蕙; 于增辉; 马欢波; 张志刚; 万琦; 侯洪为
Original assignee: 中国海洋石油集团有限公司; 中海油田服务股份有限公司
Priority date: 2019-08-21
Filing date: 2020-04-02
Publication date: 2021-02-25
Also published as: CA3150396A1; MX2022001986A; CN110486006A; CA3150396C; CN110486006B

Abstract

A resistivity measurement polar plate, comprising a polar plate bracket (1), a composite polar plate (2), and an electrode assembly (3). The electrode assembly is mounted on the composite polar plate. The composite polar plate is mounted on the polar plate bracket. The composite polar plate comprises a first insulator (21), a second insulator (22), and an electrode contact (23). The first insulator is connected to the second insulator. The electrode contact penetrates the first insulator. One end of the electrode contact is buried in the second insulator, and the other end of the electrode contact is exposed for connection to the electrode assembly. Also disclosed is a manufacturing method for this resistivity measurement polar plate.

Description

Resistivity measuring electrode plate and manufacturing method

Technical field

The embodiments of the present application relate to but not limited to the field of petroleum logging instruments, and particularly relate to but not limited to a resistivity measuring electrode plate and a manufacturing method.

Background technique

Microsphere focusing logging tool is one of the methods of micro-resistivity logging. By changing the arrangement of electrode components and the power supply mode, the measured wash zone resistivity (Rxo) is neither affected by the low-resistivity mud cake nor Affected by the resistivity of the original formation, the resistivity of the formation flushing zone can be measured more accurately. The micro-resistivity spherical focusing measurement plate is the key component of the micro-sphere focusing logging tool. The micro-resistivity spherical focusing measurement plate The performance directly affects the final measurement results of the microsphere focusing logging tool.

Summary of the invention

The following is an overview of the topics detailed in this article. This summary is not intended to limit the scope of protection of the claims.

The embodiment of the present application provides a resistivity measuring electrode plate, which includes a electrode plate bracket, a composite electrode plate and an electrode assembly;

The electrode assembly is mounted on the composite electrode plate, and the composite electrode plate is mounted on the electrode plate bracket;

The composite electrode plate includes a first insulator, a second insulator, and an electrode contact, the first insulator is connected to the second insulator, the electrode contact passes through the first insulator, and the electrode contact One end is buried in the second insulator, and the other end is exposed for connection with the electrode assembly.

The embodiment of the present application also provides a method for manufacturing a resistivity measuring plate, and the manufacturing method includes the following steps:

Pass the electrode contact through the first insulator and fix it with the first insulator;

Fixing the first insulator with the electrode contact and the second insulator to form a composite electrode plate;

Install the electrode assembly on the composite electrode plate;

Install the composite electrode plate with the electrode assembly on the electrode plate bracket.

After reading and understanding the summary of the drawings and the implementation of the embodiments of the present application, other aspects can be understood.

Figure overview

FIG. 1 is a schematic diagram of an exploded structure of a resistivity measuring plate according to an embodiment of the application;

Fig. 2 is an enlarged schematic diagram of the structure of part A in Fig. 1;

3 is a schematic diagram of the structure of the composite electrode plate according to an embodiment of the application;

Fig. 4 is a schematic cross-sectional view of B-B in Fig. 3;

Fig. 5 is a schematic flow chart of a method for manufacturing a resistivity measuring plate according to an embodiment of the application.

Illustration description:

1-pole plate bracket, 11-wear block, 12-support, 2-composite plate, 21-first insulator, 22-second insulator, 23-electrode contact, 24-arc, 25-slot Body, 26-through hole, 27-groove, 28-projection, 3-electrode assembly, 31-electrode frame, 32-connection hole, 4-screw.

Detail

Hereinafter, the embodiments of the present application will be described in detail with reference to the drawings. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily if there is no conflict.

In the following description, many specific details are set forth in order to fully understand this application. However, this application can also be implemented in other ways different from those described here. Therefore, the protection scope of this application is not subject to the specific implementations disclosed below. Limitations of cases.

In some cases, the measurement plates of the microsphere focusing logging tool are mainly rubber plates, but the rubber plates have poor wear resistance, deformation and wear are serious downhole and cannot be recovered, and the rubber plates are torn in long well logging. In the case of cracks, it cannot meet the requirements of high-temperature wells and long open-hole sections. In some cases, polyether ether ketone (PEEK) plates are often used as measurement plates in microsphere focusing logging tools. The intrusion of liquid leads to a decrease in the insulation performance of the plate, and the wear is more obvious after repeated use, which affects the measurement effect.

The embodiments of the present application provide a resistivity measurement electrode plate and a manufacturing method. The resistivity measurement electrode plate can effectively avoid wear and damage in the downhole environment and increase the service life. The electrode plate manufacturing method helps to improve the resistivity measurement electrode. The working reliability of the board.

The embodiment of the present application provides a resistivity measuring electrode plate, as shown in Figures 1 to 4, the resistivity measuring electrode plate may include a plate holder 1, a composite electrode plate 2 and an electrode assembly 3; the electrode assembly 3 can be installed On the composite electrode plate 2, the composite electrode plate 2 can be installed on the electrode plate bracket 1; the composite electrode plate 2 can include a first insulator 21, a second insulator 22 and an electrode contact 23. The first insulator 21 can be connected to the second insulator. The insulator 22 is connected, the electrode contact 23 can pass through the first insulator 21, one end of the electrode contact 23 can be buried in the second insulator 22, and the other end can be exposed for connection with the electrode assembly 3.

The electrode contact 23 can be made of beryllium copper, which is an alloy with good comprehensive mechanical, physical and chemical properties. After quenching and tempering, it has high strength, elasticity, wear resistance, fatigue resistance and heat resistance. It also has high electrical conductivity, thermal conductivity, cold resistance and non-magnetic properties. In addition, the material has good corrosion resistance and can be used for a long time in the atmosphere, fresh water and sea water.

The resistivity measurement electrode plate provided by the embodiment of this application can effectively improve the wear resistance of the structure by using the composite electrode plate 2, thereby reducing the overall wear of the resistivity measurement electrode plate. The composite electrode plate 2 can avoid There are tears in the measurement of well sections above meters and significantly improve the quality of logging in high-temperature wells. Moreover, the composite pole plate 2 is installed on the pole plate bracket 1, and the pole plate bracket 1 can have a certain protective effect on the composite pole plate 2, thereby further reducing the wear of the composite pole plate 2 and greatly increasing the resistivity measurement electrode. The service life and working reliability of the board. The resistivity measurement electrode plate provided by the embodiment of the application has a relatively simple structure, high working reliability, and long service life, which greatly improves the practicability of the measurement structure.

In an exemplary embodiment, as shown in FIG. 1, a support part 12 may be provided on the electrode plate bracket 1, and the composite electrode plate 2 may be fixed on the support part 12. Both ends of the support portion 12 may be provided with wear blocks 11, the upper end of the wear block 11 may be higher than the upper end of the composite electrode plate 2, and the lower end of the wear block 11 may be lower than the lower end of the composite electrode plate 2.

The pole plate bracket 1 can be provided with a supporting portion 12, and at both ends of the supporting portion 12, a wear-resistant block 11 can be provided on both sides of each end (that is, a total of four wear-resistant blocks 11 can be provided). The plate 2 can be fixed on the supporting part 12. The upper ends of the four wear blocks 11 can all be higher than the composite electrode plate 2, and the lower ends can all be lower than the composite electrode plate 2, so that the wear blocks 11 can better match the composite electrode plate 2 Protect and position the composite pole plate 2. The two ends of the composite electrode plate 2 can be arc-shaped 24, and the inner surface of the wear block 11 can also have an arc to match and fit the two ends of the composite electrode plate 2. When the resistivity measuring electrode plate goes down the well, the external environment firstly wears the surface of the wear-resistant block 11, and the composite electrode plate 2 is worn only after the wear-resistant block 11 is worn. In addition, the wear-resistant layer can be coated on the wear-resistant block 11 to achieve the effect of wear-resistant. When the wear-resistant block 11 is worn, the surface of the wear-resistant block 11 can be sprayed again with a wear-resistant layer, so that the structure can be used repeatedly , The composite pole plate 2 is better protected from damage, and at the same time, the high use cost caused by multiple replacement of the wear-resistant structure is avoided.

In an exemplary embodiment, as shown in FIG. 1, the composite electrode plate 2 and the electrode plate bracket 1 can be fixed by screws 4. It should be understood that the fixing method of the composite electrode plate 2 and the electrode plate bracket 1 is not limited to the aforementioned screws, for example, it can be fixed by means of clamping, bonding, etc.

In an exemplary embodiment, as shown in FIGS. 1 to 4, the composite electrode plate 2 may be shield-shaped, the surface of the composite electrode plate 2 may be provided with a plurality of grooves 25, and the first insulator 21 may be provided with a plurality of channels. The hole 26 is used to install the electrode contact 23, and the first insulator 21 can also be provided with a groove 27 at the lower end of the through hole 26 to fix the second insulator 22.

The composite electrode plate 2 can be a curved plate as a whole. The upper surface of the composite electrode plate 2 can be provided with a plurality of concentric grooves 25 for installing the electrode assembly 3. Wherein, the groove body 25 may be opened on the upper surface of the first insulator 21, and the plurality of groove bodies 25 may include a rectangular groove located in the innermost part and a rectangular ring groove sleeved outside the rectangular groove.

A plurality of through holes 26 may be provided on the first insulator 21 for mounting the electrode contacts 23. The upper end of the through hole 26 can communicate with the groove body 25 so that the other end of the electrode contact 23 is connected to the electrode assembly 3 installed in the groove body 25.

The portion of the first insulator 21 at the lower end of the through hole 26 can also be provided with a groove 27 to fix the second insulator 22. Wherein, the lower part of the first insulator 21 is provided with a groove 27 to fix the second insulator 22, and the lower end of the through hole 26 is in communication with the groove 27 so that one end of the electrode contact 23 can extend out of the lower end of the through hole 26 and be buried in Inside the second insulator 22. As shown in FIG. 4, the lower end of the first insulator 21 may be provided with a protrusion 28, the groove 27 may be opened on the protrusion 28, and the lower end of the groove 27 may penetrate the lower end surface of the protrusion 28, and the upper end may It communicates with the lower end of the through hole 26.

The electrode contact 23 can pass through the through hole 26, one end can be buried in the second insulator 22, and the other end can be exposed for connection with the electrode assembly 3. It should be noted that the direction "down" described here does not correspond to the direction in FIG. 4 (due to the cross-sectional direction problem), and the direction "down" here should correspond to the direction "left" in FIG.

In an exemplary embodiment, the first insulator 21 may be a polyetheretherketone material, the second insulator 22 may be a fluororubber material, and the first insulator 21 and the second insulator 22 may be fixedly connected by vulcanization.

The first insulator 21 can be made of PEEK-1000 (polyether ether ketone). This material is made of pure polyether ether ketone resin. It has the best toughness and best impact resistance among all PEEK material grades. The glass transition temperature is as high as 151℃, the melting point is 348℃, and the long-term use temperature is 260℃. The material still has excellent insulation and stable electrical properties under high temperature, high pressure, high speed, high humidity and other environments. In addition, the material has extremely low water absorption and linear thermal expansion coefficient, and its products have excellent dimensional stability in various application environments. The second insulator 22 can be made of fluorine rubber, which has excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance. The high temperature resistance of fluorine rubber can be used for a long time at 250 ℃ , Short-term use at 300 ℃; and good electrical performance, lower moisture absorption than other elastomers, can play a better insulation effect, can be used under low frequency and low pressure, can work reliably in harsh conditions underground. The first insulator 21 and the second insulator 22 can be vulcanized and fixed to form an integrated structure, so that the composite electrode plate 2 has both wear resistance and insulation properties. The composite pole plate 2 can be a composite of the first insulator 21 (polyether ether ketone) and the second insulator 22 (fluororubber). The polyether ether ketone is on the upper layer and is in direct contact with the well wall to play a wear resistance. The fluororubber is on the lower layer. (One end of the electrode contact 23 extends into the second insulator 22) to improve the insulation of each electrode assembly 3.

It should be understood that the first insulator 21 and the second insulator 22 are not limited to the aforementioned materials, and may also be made of other insulating materials.

In an exemplary embodiment, as shown in FIG. 1, the electrode assembly 3 may include a plurality of electrode frames 31, and the electrode frame 31 may be provided with a connection hole 32 connected to the other end of the electrode contact 23. It should be understood that the connection between the other end of the electrode contact 23 and the electrode assembly 3 is an electrical connection. The other end of the electrode contact 23 can be inserted into the connection hole 32 of the electrode frame 31 to achieve electrical connection, or the electrode contact 23 The other end can be in contact with the electrode frame 31 of the electrode assembly 3 for electrical connection.

The electrode assembly 3 may include a plurality of rectangular electrode frames 31, a plurality of corresponding grooves 25 may be provided on the composite electrode plate 2 (as shown in FIGS. 2 and 3), and the electrode frame 31 may be passed through screws 4 and high-strength glue The groove 25 is embedded and fixed to the composite pole plate 2 in a double manner.

As shown in FIG. 1, a plurality of trough bodies 25 can be arranged concentrically, correspondingly, a plurality of electrode frames 31 can also be arranged concentrically, and each electrode frame 31 can be connected with at least one electrode contact 23. In an exemplary embodiment, the number of electrode frames 31 may be the same as the number of electrode contacts 23, and each electrode frame 31 may be connected to one electrode contact 23.

In an exemplary embodiment, as shown in FIG. 4, the contact surface of the electrode contact 23 and the first insulator 21 may be a tapered surface.

The first insulator 21 may be provided with a through hole 26, the electrode contact 23 passes through the through hole 26 and is fixed in contact with the first insulator 21, and the contact surface is a tapered surface, wherein the inner sidewall surface of the through hole 26 and the electrode contact The outer wall surfaces of 23 are in contact, that is, the inner wall surface of the through hole 26 is a tapered surface, and the outer wall surface of the electrode contact 23 includes a tapered surface. The conical surfaces of the through holes 26 and the electrode contacts 23 may be conical surfaces with a large upper diameter and a small lower diameter.

In an exemplary embodiment, the electrode contact 23 and the first insulator 21 may be fixed by adhesive.

The surface of the electrode contact 23 can be coated with non-metal and metal adhesive glue and then pressed into the through hole 26 of the first insulator 21, so that the electrode contact 23 can be fixed with the first insulator 21, and one end of the electrode contact 23 can be It extends into the second insulator 22 and is fixed to the second insulator 22 (it can be directly clamped or fixed by applying adhesive glue).

The embodiment of the present application also provides a method for manufacturing a resistivity measuring plate. As shown in FIG. 5, the manufacturing method includes the following steps: a) Pass the electrode contact 23 through the first insulator 21 and fix it with the first insulator 21 B) vulcanize and fix the first insulator 21 and the second insulator 22 with the electrode contacts 23 to form the composite electrode plate 2; c) install the electrode assembly 3 on the composite electrode plate 2; d) install the electrode assembly The composite pole plate 2 of 3 is installed on the pole plate bracket 1.

In the method for manufacturing the resistivity measuring electrode plate provided by the embodiment of the application, the first insulator 21 and the second insulator 22 are vulcanized and fixed to form the composite electrode plate 2, which greatly improves the wear resistance of the composite electrode plate 2, thereby reducing the resistivity measuring electrode. The overall wear of the plate, and the composite pole plate 2 is installed on the pole plate bracket 1. The pole plate bracket 1 can have a certain protective effect on the composite pole plate 2, thereby further reducing the wear on the composite pole plate 2. Greatly increase the service life and working reliability of the resistivity measuring plate. In addition, the manufacturing method of the resistivity measuring plate provided by the embodiment of the present application is simple to operate and facilitates flow processing.

In an exemplary embodiment, in step a), adhesive glue is applied to the surface of the electrode contact 23 for fixing with the first insulator 21.

The surface of the electrode contact 23 is coated with adhesive glue and fixed to the first insulator 21. One end of the electrode contact 23 extends into the second insulator 22, and the other end is connected to the electrode assembly 3.

In the description in this application, it should be noted that the term "plurality" refers to two or more, "upper", "lower", "left", "right", "one end", and "the other end". The orientation or positional relationship indicated by "" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the structure referred to has a specific orientation and is constructed in a specific orientation. And operation, therefore can not be understood as a limitation of this application.

In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms “connected”, “connected”, and “installed” should be understood in a broad sense. For example, the term “connected” can be a fixed connection or an optional Detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood under specific circumstances.

The embodiments described in this application are exemplary rather than restrictive, and it is obvious to those of ordinary skill in the art that there can be more embodiments within the scope of the embodiments described in this application. And implementation plan. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment can be used in combination with, or substituted for, any other feature or element in any other embodiment.

This application includes and contemplates combinations with features and elements known to those of ordinary skill in the art. The embodiments, features, and elements disclosed in this application can also be combined with any conventional features or elements to form a unique technical solution defined by the claims. Any feature or element of any embodiment can also be combined with features or elements from other technical solutions to form another unique technical solution defined by the claims. Therefore, it should be understood that any feature shown and/or discussed in this application can be implemented individually or in any appropriate combination. Therefore, the embodiments are not restricted except for the restrictions made according to the appended claims and their equivalents. In addition, various modifications and changes can be made within the protection scope of the appended claims.

In addition, when describing representative embodiments, the specification may have presented the method and/or process as a specific sequence of steps. However, to the extent that the method or process does not depend on the specific order of the steps described herein, the method or process should not be limited to the steps in the specific order described. As those of ordinary skill in the art will understand, other sequence of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation on the claims. In addition, the claims for the method and/or process should not be limited to executing their steps in the written order. Those skilled in the art can easily understand that these orders can be changed and still remain within the spirit and scope of the embodiments of the present application. Inside.

Claims

A resistivity measuring electrode plate, comprising a plate bracket, a composite electrode plate and an electrode assembly;

The electrode assembly is mounted on the composite electrode plate, and the composite electrode plate is mounted on the electrode plate bracket;

The composite electrode plate includes a first insulator, a second insulator, and an electrode contact, the first insulator is connected to the second insulator, the electrode contact passes through the first insulator, and the electrode contact One end is buried in the second insulator, and the other end is exposed for connection with the electrode assembly.
The resistivity measuring electrode plate according to claim 1, wherein a support part is provided on the electrode plate bracket, and the composite electrode plate is fixed on the support part.
The resistivity measuring electrode plate according to claim 2, wherein two ends of the support portion are provided with wear blocks, the upper end of the wear block is higher than the upper end of the composite electrode plate, and the wear block The lower end is lower than the lower end of the composite plate.
The resistivity measuring electrode plate according to claim 3, wherein, of the two ends of the supporting part, the wear-resistant blocks are provided on both sides of each end.
The resistivity measuring electrode plate according to any one of claims 1-4, wherein a groove is opened at the lower part of the first insulator to fix the second insulator, and the first insulator is provided with a plurality of through holes The hole is used to install the electrode contact, and the lower end of the through hole is communicated with the groove.
The resistivity measurement electrode plate according to claim 5, wherein the upper part of the composite electrode plate is provided with a groove body, the electrode assembly is mounted to the groove body, and the groove body communicates with the upper end of the through hole .
The resistivity measuring electrode plate according to claim 5, wherein the composite electrode plate is shield-shaped.
The resistivity measuring electrode plate according to any one of claims 1 to 4, wherein the first insulator and the second insulator are fixedly connected by vulcanization.
The resistivity measuring electrode plate according to any one of claims 1 to 4, wherein the electrode assembly comprises a plurality of electrode frames, and the electrode frame is provided with a connection hole connected to the other end of the electrode contact .
The resistivity measuring electrode plate according to any one of claims 1 to 4, wherein the contact surface between the electrode contact and the first insulator is a tapered surface.
The resistivity measuring electrode plate according to claim 10, wherein the first insulator is provided with a through hole for mounting the electrode contact, and an inner side wall surface of the through hole is in contact with an outer side wall surface of the electrode contact And the contact surface is a conical surface with a large upper diameter and a small lower diameter.
11. The resistivity measuring plate according to claim 11, wherein the electrode contact and the first insulator are fixed by adhesive.
A manufacturing method of a resistivity measuring plate includes the following steps:

Pass the electrode contact through the first insulator and fix it with the first insulator;

Fixing the first insulator with the electrode contact and the second insulator to form a composite electrode plate;

Install the electrode assembly on the composite electrode plate;

Install the composite electrode plate with the electrode assembly on the electrode plate bracket.
The manufacturing method of the resistivity measuring electrode plate according to claim 13, wherein the adhesive glue is applied on the surface of the electrode contact for fixing with the first insulator;

The first insulator and the second insulator are vulcanized and fixed.
The manufacturing method of the resistivity measuring electrode plate according to claim 13 or 14, wherein the first insulator and the second insulator are fixed such that one end of the electrode contact is buried in the second insulator;

The electrode assembly is mounted on the composite electrode plate so that the other end of the electrode contact is connected with the electrode assembly.