Pressure pulse wireless control type multi-layer oil well intelligent separate production system

Abstract

The utility model relates to a pressure pulse wireless control type multi-layer oil well intelligent separate production system which comprises a ground pulse generator, a pulse receiver, a pressure transmission pipeline, a single-channel bottom-hole regulator, a hydraulic pipe passing packer, a double-channel bottom-hole regulator and a uniflow valve. The implementation method is applied to a rod pump (a cylinder pump and a screw pump) producing well, a ground pulse generator performs pulse issuing in an oil pipe, and a pulse receiver connected to the oil pipe in series performs pressure pulse receiving; a piston in the pulse receiver transmits pressure in an oil pipe into the underground single-channel bottom-hole regulator and the dual-channel bottom-hole regulator through a hydraulic pipeline, and then the opening degree of a regulating valve is controlled by a control unit arranged in the bottom-hole regulator.

Description

Technical Field

[0001] The utility model relates to a pressure pulse wireless controlled multi-layer oil well intelligent production system, including: a ground pulse generator, a pulse receiver, a pressure transmission pipeline, a single-channel production distributor, a hydraulic pipe packer, a dual-channel production distributor, and a single-flow valve. This implementation method is applied to rod pump (barrel pump, screw pump) oil production wells, wherein the ground pulse generator sends pulses in the oil pipe, and receives pressure pulses through the pulse receiver connected in series on the oil pipe. The piston in the pulse receiver transmits the pressure in the oil pipe to the single-channel production distributor and the dual-channel production distributor in the well through the hydraulic pipeline, and then the control unit built into the production distributor controls the opening of the regulating valve. Background Art

[0002] my country is rich in oil resources and the oil extraction industry is developing rapidly. At present, my country has many oil wells, but different oil wells have their own particularities. Therefore, the suitable oil well extraction technologies are different, which brings some problems to the actual extraction of oil wells. Oil well separation technology is a scientific and efficient extraction technology that is suitable for a variety of geographical environments. It is not only conducive to improving the oil extraction rate, but also an effective means to increase the oil extraction volume, oil extraction level and oil extraction quantity.

[0003] Oil well separation technology has been widely used in my country. At present, the construction process of conventional mechanical separation technology and cable-controlled separation technology is relatively complex and the cost is relatively high. This patent is a pressure pulse wirelessly controlled multi-layer oil well separation system and implementation method. This patent uses oil production pressure pulses to control multi-layer oil well separation, with low construction cost and high efficiency. Utility Model Content

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A pressure pulse wireless controlled multi-layer oil well intelligent production system comprises a surface pulse generator, a pressure pulse receiver, a hydraulic pipeline, a single-channel production distributor, a hydraulic pipe packer and a dual-channel production distributor.

[0006] The surface pulse generator is an electric control valve group installed in the wellhead oil pipeline, and the pressure difference fluctuation in the oil pipeline is achieved by adjusting the opening of the electric control valve.

[0007] The pressure pulse receiver is installed in series with the oil pipe and placed on the pump. The inner diameter of the pulse receiver is not less than the inner diameter of the oil pipe, which can meet the passage of the sucker rod and the detection tool. An oil chamber is provided inside the pulse receiver, and the oil chamber is pre-filled with hydraulic oil. A hydraulic pipeline joint is provided at the lower joint of the pulse receiver to realize the pressure conduction path between the oil chamber of the pulse receiver and the hydraulic pipeline.

[0008] The hydraulic pipeline is pre-filled with hydraulic oil.

[0009] The single-channel dispenser is provided with a single liquid inlet channel, and is internally provided with an electric control unit, a detection unit, and a power supply unit.

[0010] The single-channel production distributor is installed at the oil layer under the pump; hydraulic pipeline joints are provided at the upper and lower joints of the single-channel production distributor, and the single-channel production distributor and the pressure pulse receiver are connected across the pump through hydraulic pipelines and hydraulic pipeline joints to realize a pressure conduction path.

[0011] The single-channel production distributor includes three pressure sensors, which respectively realize pressure detection inside and outside the pipe and store formation production pressure. One of the pressure sensors can detect pressure fluctuations in the hydraulic pipeline, and the valve opening can be adjusted through identification and analysis by the built-in electronic control system.

[0012] The oil layers are isolated by hydraulic pipes, which pass through the packers.

[0013] A dual-channel production distributor is installed at the oil layer at the lower end of the hydraulic pipe packer.

[0014] The double-liquid-inlet channel distributor is provided with a hydraulic pipe joint, which can be connected to a hydraulic pipe to form a control oil circuit.

[0015] The dual-channel production distributor is provided with a dual-axis system and dual liquid inlet channels, so that one production distributor can complete the exploitation of two oil layers, and can complete the functions of combined production, separate production and adjustment of the opening of each valve of the two oil layers according to production needs.

[0016] The pressure pulse wireless controlled multi-layer oil well production system and implementation method, the production system is equipped with N-1 production devices (N is the number of production layers), the bottom production device has dual channels, and the production devices in each upper layer have single channels.

[0017] Using the pressure pulse wireless controlled multi-layer oil well intelligent production system, the method includes the following steps:

[0018] Step 1: Determine the single-channel production quantity based on the number of producing oil layers.

[0019] Step 2: During construction, as the tubing is lowered, the screen, check valve, dual-channel production distributor, hydraulic pipe packer, single-channel production distributor, hydraulic pipe packer, pump barrel, and pulse receiver are connected in sequence; while lowering the tools, the hydraulic pipeline joints are installed and the hydraulic pipes are fixed to the tubing.

[0020] Step 3: Install the rod pump (screw pump), install the wellhead pipe group, and install the pulse generator on the wellhead oil pipeline.

[0021] The beneficial effects of the utility model are:

[0022] The utility model adopts a pulse pressure wave control method to switch the exploitation of multiple oil layers and adjust the opening of the switch valve. A control oil circuit is formed between tools through hydraulic pipes to ensure effective transmission of pressure. Three pressure sensors are arranged in the production distributor, which can simultaneously monitor the pressure inside and outside the oil pipe and the pressure inside the hydraulic pipeline, and form control instructions by identifying and analyzing the pressure pulse changes of the hydraulic pipeline. The number of production distributors equipped in the production distribution system is N-1 (N is the number of production layers), the bottom production distributor has dual channels, and the production distributors in each upper layer have single channels. A pulse generator is installed on the wellhead pipe group, which can generate regular pressure pulse waves, and the control of multi-layer downhole production distributors is realized through regular pressure pulse waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Figure 1 This is a schematic diagram of the utility model pressure pulse wireless control multi-layer oil well intelligent production system;

[0025] Figure 2 It is a schematic diagram of the structure of a pulse receiver of the utility model;

[0026] Figure 3 It is a structural schematic diagram of a single-channel production distributor of the utility model.

[0027] Figure 4 It is a schematic diagram of the structure of the dual-channel production distributor of the utility model.

[0028] Figure 1 Middle: pulse receiver a, single-channel production device b, hydraulic pipe packer c, dual-channel production device d, hydraulic pipeline e.

[0029] Figure 2 Middle: upper joint a1, piston a2, liquid chamber shell a3, center tube a4, lower joint a5, hydraulic pipe joint a6.

[0030] Figure 3 In the middle: hydraulic pipe joint b1, upper joint b2, long liquid pipe b3, shaft system fixing seat b4, short liquid pipe b5, lower joint b6, lower joint b7, detection unit b8, center pipe b9, shell b10, switch shaft system b11.

[0031] Figure 4 Middle: hydraulic pipe joint c1, upper joint c2, detection unit c3, center pipe c4, switch shaft c5, shaft fixing seat c6, lower joint c7, switch shaft c8, housing c9. DETAILED DESCRIPTION

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] The utility model is further described in detail below in conjunction with the accompanying drawings. Specific implementation method one:

[0035] like Figure 1 As shown, a pressure pulse wireless controlled multi-layer oil well intelligent production system includes a pulse receiver a, a single-channel production distributor b (b1, b2, bn (n represents the number of single-channel production distributors)), a through-liquid pipe packer c (c1, c2, c3, cn (n represents the number of through-liquid pipe packers)), a dual-channel production distributor d, a hydraulic pipeline e, and a single-flow valve g.

[0036] Among them, the pulse receiver a is connected to the single-channel producer b1 through the oil pipe f, and the signal is transmitted through the hydraulic pipeline e; the single-channel producer b1 is connected to the liquid pipe packer c1 through the oil pipe f, and the hydraulic pipeline e passes through the liquid pipe packer c1; the liquid pipe packer c1 is connected to the single-channel producer b2 through the oil pipe f, and the single-channel producer b1 and the single-channel producer b2 transmit signals through the hydraulic pipeline e; the single-channel producer b2 is connected to the liquid pipe packer c2 through the oil pipe f, and the hydraulic pipeline e passes through the liquid pipe packer c2; the liquid pipe packer c2 is connected to the dual-channel producer d through the oil pipe f, and the single-channel producer b2 and the dual-channel producer d transmit signals through the hydraulic pipeline e; the dual-channel producer d is connected to the liquid pipe packer c3 through the oil pipe f; the lower part of the liquid pipe packer c3 is connected to the single-flow valve g. Specific implementation method 2:

[0038] like Figure 2As shown, a pressure pulse wireless controlled multi-layer oil well production system and implementation method, including a pulse receiver a, which is composed of an upper joint a1, a piston a2, a liquid chamber shell a3, a center tube a4, a lower joint a5, and a hydraulic pipe joint a6. The upper joint a1 is connected to the liquid chamber shell a3 by threads; the upper joint a1 is connected to the center tube a4 by interference fit; the center tube a4 is connected to the lower joint a5 by interference fit; the liquid chamber shell a3 and the lower joint a5 are connected by threads; the lower joint a5 is connected to the hydraulic pipe joint a6 by threads. The upper joint a1, the piston a2, the liquid chamber shell a3, the center tube a4, and the lower joint a5 form an oil chamber filled with hydraulic oil; the oil chamber is connected to the hydraulic pipeline e through the hydraulic pipe joint a5 to form a hydraulic oil circuit. Specific implementation method three:

[0040] like Figure 3 As shown, a pressure pulse wireless controlled multi-layer oil well production system and implementation method include a single-channel production distributor b consisting of a hydraulic pipe joint b1, an upper joint b2, a long liquid pipe b3, a shaft fixing seat b4, a short liquid pipe b5, a lower joint b6, a hydraulic pipe joint b7, a detection unit b8, a center pipe b9, a shell b10, and a switch shaft b11. Among them, the hydraulic pipe joint b1 is connected to the upper joint b2 by threads; the upper joint b2 is connected to the detection unit b8 by threads, and the detection unit b8 is placed inside the single-channel dispenser b; the upper joint b2 is connected to the outer shell b10 by threads; the upper joint b2 is connected to the long liquid tube b3 by interference fit; the long liquid tube b3 is connected to the shaft system fixing seat b4 by interference fit; the shaft system fixing seat b4 is connected to the outer shell b10 by threads; the shaft system fixing seat b4 is connected to the switch shaft system b11 by interference fit; the shaft system fixing seat b4 is connected to the lower joint b6 by threads; the shaft system fixing seat b4, the short liquid tube b5, and the lower joint b6 are connected by interference fit; the lower joint b6 is connected to the hydraulic pipe joint b7 by threads.

[0041] Among them, the hydraulic pipe joint b1, the upper joint b2, the long liquid pipe b3, the shaft system fixing seat b4, the short liquid pipe b5, the lower joint b6, and the hydraulic pipe joint b7 form a conductive oil circuit; the hydraulic pipe joint b1 is connected to the hydraulic pipeline connected to the pulse receiver a, and the hydraulic pipe joint b7 is connected to the hydraulic pipeline that passes through the liquid pipe sealer c, forming a continuous control oil circuit. Specific implementation method four:

[0043] like Figure 3 As shown, the single-channel distributor b is provided with a detection unit b8 and a switch shaft system b11; the detection unit b8 detects the pressure fluctuation of the oil circuit, generates a control command, and controls the switch shaft system b11 to adjust the opening. Specific implementation method five:

[0045] like Figure 4As shown, the dual-channel production distributor d is installed at the bottom of the tool string; the dual-channel production distributor d is provided with a hydraulic pipe joint c1, an upper joint c2, a detection unit c3, a central tube c4, a switch shaft c5, a shaft fixing seat c6, a lower joint c7, a switch shaft c8, and a shell c9; wherein the hydraulic pipe joint c1 is connected to the upper joint c2 by a thread; the upper joint c2 is connected to the shell c9 by a thread; the upper joint c2 is connected to the detection unit c3 by a thread; the upper joint c2 is connected to the central tube c4 by an interference fit; the switch shaft c5, the switch shaft c8 and the shaft fixing seat c6 are connected by an interference fit; the central tube c4 and the shaft fixing seat c6 are connected by an interference fit; the shaft fixing seat c6 and the shell c9 are connected by a thread; the shaft fixing seat c6 and the lower joint c7 are connected by a thread.

[0046] The hydraulic pipe joint c1, the upper joint c2, and the detection unit c3 constitute a detection path, wherein the hydraulic pipe joint c1 is connected to the tail end of the hydraulic pipeline to complete the terminal of the hydraulic oil circuit; wherein the detection unit c3 can detect the pressure fluctuation in the oil circuit, and generate a control command according to the regular pressure fluctuation, and then the switch shaft system c5 and the switch shaft system c8 execute the corresponding opening command; wherein the upper joint c2, the center tube c4, the shaft system fixing seat c6, and the lower joint c7 constitute a liquid production channel, wherein the lower joint c7 is provided with a double liquid inlet channel, and the double shaft system opening adjustment of the switch shaft system c5 and the switch shaft system c8 can realize the function of controlling the liquid production of double oil layers by a single producer. Specific implementation method six:

[0048] As shown in the figure, the number of samplers supporting the sampling system is N-1 (N is the number of sampling layers), the lowest sampler has dual channels, and the samplers on each upper layer have single channels.

[0049] As shown in the figure, the oil well intelligent production system and implementation method based on post-pump pressure pulse control includes the following steps:

[0050] Step 1: Determine the single-channel production quantity based on the number of producing oil layers.

[0051] Step 2: During construction, as the tubing is lowered, the screen, check valve, dual-channel production distributor, hydraulic pipe packer, single-channel production distributor, hydraulic pipe packer, pump barrel, and pulse receiver are connected in sequence; while lowering the tools, the hydraulic pipeline joints are installed and the hydraulic pipes are fixed to the tubing.

[0052] Step 3: Install the rod pump (screw pump), install the wellhead pipe group, and install the pulse generator on the wellhead oil pipeline.

[0053] Step 4: As the rod pump continues to pump and the opening of the electronically controlled valve in the pulse generator on the wellhead oil pipeline is regularly adjusted, regular pressure fluctuations will occur in the oil pipeline. As the pressure fluctuations in the oil pipeline, the piston in the pulse receiver moves regularly, and regular pressure fluctuations will occur in the oil circuits between the tools. When the internal detection unit of the production distributor detects the pressure wave, a control command is generated to complete the valve opening adjustment of each production layer.

[0054] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. A pressure pulse wireless controlled multi-layer oil well intelligent production system, characterized by: It includes a pulse receiver a, a single-channel production distributor b, a liquid pipe packer c, a dual-channel production distributor d, a hydraulic pipeline e, and a single-flow valve g; the single-channel production distributor b includes single-channel production distributor b-1, single-channel production distributor b-2, and single-channel production distributor bn, where n represents the number of single-channel production distributors; the liquid pipe packer c includes liquid pipe packer c-1, liquid pipe packer c-2, liquid pipe packer c-3, and liquid pipe packer cn, where n represents the number of liquid pipe packers; The pulse receiver a is connected to the single-channel producer b-1 through the oil pipe f, and the signal is transmitted through the hydraulic pipeline e; the single-channel producer b-1 is connected to the liquid pipe packer c-1 through the oil pipe f, and the hydraulic pipeline e passes through the liquid pipe packer c-1; the liquid pipe packer c-1 is connected to the single-channel producer b-2 through the oil pipe f, and the single-channel producer b-1 and the single-channel producer b-2 transmit signals through the hydraulic pipeline e; the single-channel producer b-2 is connected to the liquid pipe packer c-2 through the oil pipe f, and the hydraulic pipeline e passes through the liquid pipe packer c-2; the liquid pipe packer c-2 is connected to the dual-channel producer d through the oil pipe f, and the single-channel producer b-2 and the dual-channel producer d transmit signals through the hydraulic pipeline e; the dual-channel producer d is connected to the liquid pipe packer c-3 through the oil pipe f; the lower part of the liquid pipe packer c-3 is connected to the single-flow valve g.

2. The pressure pulse wireless controlled multi-layer oil well intelligent production system according to claim 1 is characterized by: The pulse receiver a is composed of an upper joint a1, a piston a2, a liquid chamber housing a3, a central tube a4, a lower joint a5, and a hydraulic pipe joint a6; The upper joint a1 is connected to the liquid chamber shell a3 by threads; the upper joint a1 is connected to the center tube a4 by interference fit; the center tube a4 is connected to the lower joint a5 by interference fit; the liquid chamber shell a3 is connected to the lower joint a5 by threads; the lower joint a5 is connected to the hydraulic pipe joint a6 by threads; the upper joint a1, the piston a2, the liquid chamber shell a3, the center tube a4, and the lower joint a5 form an oil chamber filled with hydraulic oil; the oil chamber is connected to the hydraulic pipeline e through the hydraulic pipe joint a6 to form a hydraulic oil circuit.

3. The pressure pulse wireless controlled multi-layer oil well intelligent production system according to claim 2 is characterized by: A pressure pulse wireless controlled multi-layer oil well production system and implementation method, the single-channel production distributor b is composed of a hydraulic pipe joint b1, an upper joint b2, a long liquid pipe b3, a shaft fixing seat b4, a short liquid pipe b5, a lower joint b6, a hydraulic pipe joint b7, a detection unit b8, a central pipe b9, a shell b10, and a switch shaft b11; the hydraulic pipe joint b1 is connected to the upper joint b2 by threads; the upper joint b2 is connected to the detection unit b8 by threads, and the detection unit b8 is placed inside the single-channel production distributor b; the upper joint b2 is connected to the detection unit b8 by threads, and the detection unit b8 is placed inside the single-channel production distributor b; The joint b2 is connected to the housing b10 by threads; the upper joint b2 is connected to the long liquid tube b3 by interference fit; the long liquid tube b3 is connected to the shaft system fixing seat b4 by interference fit; the shaft system fixing seat b4 is connected to the housing b10 by threads; the shaft system fixing seat b4 is connected to the switch shaft b11 by interference fit; the shaft system fixing seat b4 is connected to the lower joint b6 by threads; the shaft system fixing seat b4, the short liquid tube b5, and the lower joint b6 are connected by interference fit; the lower joint b6 is connected to the hydraulic pipe joint b7 by threads.

4. The pressure pulse wireless controlled multi-layer oil well intelligent production system according to claim 3 is characterized by: The hydraulic pipe joint b1, upper joint b2, long liquid pipe b3, shaft fixing seat b4, short liquid pipe b5, lower joint b6, and hydraulic pipe joint b7 form an oil conduction circuit; the hydraulic pipe joint b1 is connected to the hydraulic pipeline connected to the pulse receiver a, and the hydraulic pipe joint b7 is connected to the hydraulic pipeline passing through the liquid pipe sealer c, forming a continuous control oil circuit; the single-channel distributor b is provided with a switch shaft system b11 and a detection unit b8 for detecting oil circuit pressure fluctuations and controlling the switch shaft system b11 to adjust the opening.

5. The pressure pulse wireless controlled multi-layer oil well intelligent production system according to claim 4 is characterized by: The dual-channel production distributor d is installed at the bottom of the tool string; the dual-channel production distributor d is provided with a hydraulic pipe joint c1, an upper joint c2, a detection unit c3, a central tube c4, a switch shaft c5, a shaft fixing seat c6, a lower joint c7, a switch shaft c8, and a shell c9; wherein the hydraulic pipe joint c1 is connected to the upper joint c2 by a thread; the upper joint c2 is connected to the shell c9 by a thread; the upper joint c2 is connected to the detection unit c3 by a thread; the upper joint c2 is connected to the central tube c4 by an interference fit; the switch shaft c5, the switch shaft c8 and the shaft fixing seat c6 are connected by an interference fit; the central tube c4 and the shaft fixing seat c6 are connected by an interference fit; the shaft fixing seat c6 and the shell c9 are connected by a thread; the shaft fixing seat c6 and the lower joint c7 are connected by a thread.

6. The pressure pulse wireless controlled multi-layer oil well intelligent production system according to claim 5 is characterized by: The hydraulic pipe joint c1, upper joint c2, and detection unit c3 form a detection passage, wherein the hydraulic pipe joint c1 is connected to the tail end of the hydraulic pipeline; the upper joint c2, center pipe c4, shaft system fixing seat c6, and lower joint c7 form a liquid production channel, wherein the lower joint c7 is provided with double liquid inlet channels.

7. The pressure pulse wireless controlled multi-layer oil well intelligent production system according to claim 1 is characterized by: The number of sub-collectors supporting the sub-collection system is N-1, where N is the number of sub-collection layers. The sub-collector at the bottom is a dual-channel production device d, and the sub-collectors at each upper layer are single-channel production devices b.

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