Improved method based on cabled layered water injection technology

Abstract

The invention relates to an oil field separated layer water injection technology, in particular to a method for solving the problems of power supply and communication through an intermediate structural member. According to the method, an inverted-T-shaped mouse cage structure and an eccentric inverted-T-shaped triangular sliding block are arranged underground, and a reliable power supply and communication path is provided by utilizing the space of the inner wall of a metal pipe, so that the problems of high cost, easiness in damage and the like in the existing cable technology are solved. The core of the technology is that a mechanical structure and an electrical structure are combined, so that underground operation can be smoothly carried out, and other operations can be conveniently carried out.

Description

Technical Field

[0001] The present invention relates to the field of oil extraction, and in particular to an improved method based on cabled stratified water injection technology, in particular to a solution for power transmission and two-way communication through an innovative intermediate structure, thereby optimizing the problems of cable fragility and high cost in the prior art. Background Art

[0002] Existing oilfield stratified water injection technology usually relies on cables for power transmission and downhole equipment communication. However, the existing cable stratified water injection technology faces some prominent problems, especially the cables are easily damaged under long-term high pressure and high temperature environment, and the frequent replacement leads to high maintenance costs. At the same time, the traditional power supply and communication methods have the disadvantages of occupying too much space and complicated operation. As the depth and complexity of oilfield operations increase, the shortcomings of existing technologies become more and more apparent. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems of the existing cable water injection technology and provide an improved stratified water injection scheme. The core technology is to invent an intermediate structure, which can effectively connect the packer with the existing cable water distributor and has the following two core functions: captures electrical energy and transmits it to water distributors; Realize two-way communication with the underground and forward the communication information to the water distributor.

[0004] The intermediate structure of the present invention solves the problems of power transmission and communication by combining an inverted T-shaped squirrel cage structure with an eccentric triangular slider, while avoiding the fragility and complex operation of traditional cables, thereby improving operational safety and economy. Technical Solution

[0005] In order to explain the present invention more clearly, specific implementation methods thereof are described in detail below with reference to the accompanying drawings.

[0006] Step 1: Design of intermediate structure The intermediate structure is made of conductive metal material and has an inverted T-shaped squirrel cage structure inside. The structure is assembled with the inner wall of the steel pipe through an insulating layer, and the current is guided from the structure to the control board through conductive screws. The steel pipe itself serves as the negative pole of the power supply, and the inverted T-shaped structure serves as the positive pole of the power supply. Its core working principle is to use the inverted T-shaped structure to obtain electrical energy and realize two-way communication.

[0007] Step 2: Power acquisition and supply The inverted T-shaped metal cage on the inner wall of the structure is in contact with the power supply and is fixed to the inner wall of the steel pipe through an insulating layer, maintaining a 2cm gap as an insulating layer to ensure the safe transmission of current. When the triangular slider contacts the cage structure, the current is transmitted to the underground equipment to complete the power supply.

[0008] Step 3: Two-way communication implementation Through the communication module in the structure, the signal can be fed back to the ground operating system through the current to complete two-way communication. During the communication process, the ground operating system can receive real-time information about the downhole equipment and perform accurate operation control.

[0009] Step 4: Easy operation The operator guides the triangular slider into the inverted T-shaped channel and uses the contact between the squirrel cage structure and the triangular slider to achieve power transmission. When the triangular slider is pulled into the inverted T-shaped structure, the operator can know the position by feel and further confirm whether the communication and power supply are normal. The wellhead controls the deployment and release of the triangular slider through steel wire.

[0010] Step 5 Technical Advantages The technology of the present invention has the following advantages: Easy operation: No need to change existing operating habits, equipment connection and power supply can be completed through simple manual operation.

[0011] Space optimization: Make full use of the inner wall space of the well pipe to avoid the problem of traditional cables taking up too much space.

[0012] Cost reduction: Maintenance costs are greatly reduced by reducing cable usage and repair frequency.

[0013] Strong adaptability: It is suitable for a variety of oilfield operating environments and does not need to worry about equipment interference or damage during other technical operations (such as well logging). BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 Schematic diagram of the intermediate structure.

[0015] Figure 2 Contact principle of the inverted T-shaped squirrel cage structure and the triangular slider.

[0016] Figure 3 Schematic diagram of the overall workflow. DETAILED DESCRIPTION

[0017] Referring to FIG1 , the specific implementation of the present invention includes the following steps:

[0018] Assemble the intermediate structure, ensure that the inverted T-shaped squirrel cage structure is correctly installed on the inner wall of the steel pipe, and connect it with insulating screws. The upper end of the structure is connected to the packer, and the lower end is connected to the cable water distributor.

[0019] Power is supplied to the triangular slider in the inverted T-shaped structure through the wellhead control system. The slider is pulled by a steel wire and enters the inverted T-shaped structure to complete the power connection.

[0020] When the slider enters the inverted T-shaped structure, the communication system and the downhole equipment complete two-way information transmission to ensure the normal operation of the equipment.

[0021] The operator confirms that the slider is in place and the equipment installation is complete based on the feel and wellhead information feedback. At this time, the wellhead system can read the communication information of the equipment and monitor it.

[0022] The present invention solves the problems of high cable loss and space occupation in oil field operations through mechanical structure innovation and optimization of power and communication. The new intermediate structure effectively realizes power supply and two-way communication, while reducing interference with traditional operating methods. The technology of the present invention can significantly improve the stability and economy of oil field stratified water injection technology.

Claims

1. An intermediate structural component for use in a layered water injection technology, the structural component comprising: The upper part is connected to the packer, and the lower part is connected to the existing cable water distributors of various manufacturers through threads or nuts; an inverted T-shaped cage structure is deployed on the inner wall of the structural member, and the T-shaped structures are evenly distributed on concentric circles. The top of the inverted T-shaped structure is a closed space. The inverted T-shaped cage structure is made of metal material and is assembled with the insulating layer and the inner wall of the steel pipe; the conductivity of the inverted T-shaped cage structure is extended to the inside of the metal pipe through insulating screws and a wire is led out. The wire is connected to the control board, and the steel pipe is used as the negative pole of the power supply, and the inverted T-shaped cage structure is used as the positive pole of the power supply; The structural member also includes an eccentric inverted T-shaped triangular slider, which is used for contacting the inverted T-shaped squirrel cage structure to supply power.

2. The structural member according to claim 1, characterized in that: The eccentric inverted T-shaped triangular slider is connected to the ground by an insulating thin steel wire, and is brought into contact with the inverted T-shaped squirrel cage structure by repeated pulling and lifting by an operator, thereby forming a power supply and communication path.

3. The structural member according to claim 2, characterized in that: After continuous collision with the inner wall of the metal tube, the triangular slider can be hung into the entrance of the inverted T-shaped structure and slide into the inverted T-shaped groove, thereby realizing the access of power supply and communication through the mechanical structure.

4. The structural member according to claim 3, characterized in that: After the triangular slider enters the inverted T-shaped channel, it cannot be pulled up any further, and the staff can judge by feel that the triangular slider has entered the channel, and realize underground power supply and communication through contact conduction.

5. The structural member according to claims 1 to 4, characterized in that: The triangular slider has a certain weight. After the wellhead operation is completed, the staff can loosen the steel wire to make it fall off smoothly, and pull it out of the wellhead by lifting the steel wire to facilitate other technical operations.

6. A method for realizing oil field stratified water injection technology using an intermediate structural member, comprising the following steps: An intermediate structure including an inverted T-shaped cage structure and an eccentric inverted T-shaped triangular slider is deployed underground; the operator lowers an insulating thin steel wire to bring the triangular slider into the inverted T-shaped channel to complete the contact with the inverted T-shaped cage structure; through this contact, a power supply path is formed and communication is achieved with the control system; after power supply and communication are completed, other oilfield operations are carried out, and the triangular slider is smoothly removed after the operation is completed.

Images