Coiled tubing wireless collar locator device

Abstract

The present application relates to a kind of coiled tubing wireless collar locator device, including electromagnetic induction module, signal control module, electromagnetic valve body module and lower valve body module, the locator electromagnetic induction module includes electromagnetic induction coil and electromagnetic induction transmission, signal control module includes signal processing unit and electromagnetic valve control unit, the signal processing unit is used to identify the processing of electromagnetic induction signal, the electromagnetic valve control unit is used to convert the action of electromagnetic valve body into judgment signal signal.This application uses electromagnetic induction to identify casing collar to generate corresponding pulse signal to position tool depth, tool operation does not need to connect cable power supply or signal transmission when, can always circulate fluid in operation process, and there is no protruding positioning piece on the surface of tool in operation process, no casing collar position preset step, increase wellbore integrity, avoid the risk that locator meets resistance.

Description

Technical Field

[0001] This invention relates to downhole operating equipment, and more specifically, to a wireless coupling positioner device for coiled tubing. Background Technology

[0002] Currently, coiled tubing trucks are widely used in fracturing, testing, and well workover operations. Many of these operations require precise positioning of the tool depth within the well. Currently, coiled tubing trucks commonly use coiled tubing length depth gauges for depth verification. However, coiled tubing often extends in a buckled state in the horizontal section, leading to discrepancies between the positioning depth and the actual depth of the tubing's descent. While using the coiled tubing descent depth for verification is sufficient for some routine operations, it fails to meet the accuracy requirements for operations with high positioning precision. For example, in the stimulation of closely spaced oil and gas reservoirs, incomplete stimulation can occur, affecting oil and gas evaluation and production outcomes.

[0003] Currently, the most commonly used tools for precise positioning are cable-type positioning tools. However, cable equipment is scarce, construction costs are high, and there are significant technical challenges in circulating and sealing cable-driven coiled tubing in coiled tubing systems.

[0004] Patent CN101899954 discloses a wellhead tool depth locator and positioning method. The tool surface is equipped with movable steel balls. When the positioning tool reaches the short casing position, the steel balls can engage in the coupling step, preventing the tool from descending further. At this point, the locator is verified to have reached the short casing position. Subsequently, hydraulic action within the tubing causes the steel balls to exit the tool string, allowing further descent and achieving the positioning effect. This locator can effectively position the casing. However, during operation, a step needs to be pre-designed at the short casing coupling position, and the protruding steel balls on the tool surface pose a risk of obstruction during descent.

[0005] Patent CN103850676 discloses a novel casing coupling positioner for coiled tubing. Its main components include a positioning plate and a spring. The positioning plate is supported by the spring under a certain force. When the tool passes over the casing coupling step, the suspended weight of the coiled tubing suddenly increases. The tool insertion depth is determined by recording and comparing the suspended weight of the coiled tubing with that of the casing coupling. This solution also requires a step at the casing coupling location and a protruding positioning plate on the tool surface.

[0006] Patent CN2763506Y discloses an anti-vibration magnetic positioner, which mainly consists of a frame element and a probe. A movable differential threaded coupling is designed between the magnetic positioning instrument and the perforation gun connector. A shock-absorbing spring is installed inside the probe assembly, greatly improving the shock absorption effect. The entire device is easy to disassemble and the parts are easy to replace. However, this tool relies on a cable to connect to the lower perforation gun, requiring a cable connection for signal transmission. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a wireless coupling locator for continuous tubing, which aims to use electromagnetic induction to identify the casing coupling and generate corresponding pulse signals to locate the tool depth. The tool does not need to be connected to a power supply cable or transmit signals during operation. Fluid can be continuously circulated during operation. Furthermore, there are no protruding positioning plates on the tool surface during operation, eliminating the need for a pre-set step at the casing coupling position, increasing wellbore integrity, and avoiding the risk of the locator encountering obstruction.

[0008] The technical solution adopted by the present invention to solve its technical problem is as follows: a wireless coupling positioner device for continuous tubing is constructed, including an electromagnetic induction module, a signal control module, an electromagnetic valve body module and a lower valve body module. The electromagnetic induction module of the positioner includes an electromagnetic induction coil and an electromagnetic induction transmission. The signal control module includes a signal processing unit and a electromagnetic valve control unit. The signal processing unit is used to identify and process the electromagnetic induction signal. The electromagnetic valve control unit is used to convert the judgment signal into the action of the electromagnetic valve body.

[0009] According to the above scheme, the electromagnetic induction module is eccentrically positioned.

[0010] According to the above scheme, shock-absorbing springs and buffer pads are provided on both sides of the electromagnetic induction coil.

[0011] According to the above scheme, the solenoid valve body module includes a solenoid valve body, a piston valve body, and a support spring. The solenoid valve body is the pilot valve of the piston valve body. The solenoid valve body structure is a two-position three-way valve body. The solenoid valve body connects the flow channel inside the oil pipe and the flow channel outside the oil pipe, and is used to control the flow channel to change the state of the lower piston valve body. In the initial state, the piston valve body is subjected to annular pressure on both sides and is kept in the upper position under the action of the support spring. At this time, the bypass flow channel is open. When the solenoid valve body receives a signal and changes position in a short time, the solenoid valve body controls the flow channel to change. The pressure on the upper part of the piston valve body becomes the pressure inside the oil pipe. At this time, a pressure difference is generated at both ends of the piston valve body. This pressure difference overcomes the force of the support spring and causes the piston valve body to move downward, closing the bypass flow channel of the positioner, so that the positioner generates a pressure pulse.

[0012] According to the above scheme, the lower valve body module includes a pin piston, a shear pin, a pin, a sealing valve plate, a locking sleeve, and a support torsion spring. In the initial state, the pin piston and the pin press the sealing valve plate tightly against the lower step, closing the lower flow channel. After the positioner completes the positioning operation, hydraulic pressure is used to open the lower flow channel, while the bypass flow channel is closed, allowing the tool string to operate normally. When the lower valve body needs to be opened, it is only necessary to increase the ground pump discharge and pump pressure. At this time, due to the cavity formed by the pin piston and the outer cylinder, the pressure areas at both ends of the piston are different. When the pressure difference increases to a certain extent, the pin piston shears the shear pin, and the pin piston moves upward with the pin. The pin piston closes the upper bypass flow channel of the positioner, and at the same time, the pin pressing the sealing valve plate retracts. The sealing valve plate opens under the action of the support torsion spring. The fully opened sealing valve plate is fixed by the locking sleeve to ensure that the flow channel will not close due to fluid action when it is open.

[0013] According to the above scheme, it also includes a pressure sensing module and a depth recording module installed on the ground. The pressure sensing module is used to detect and record the pump pressure pulse of the coiled tubing, detect and process the pump pressure signal, and when the pressure pulse signal is detected, the coiled tubing acquisition and lowering depth is corrected according to the casing coupling information table to obtain the accurate lowering depth of the positioner.

[0014] The wireless coupling positioner device for coiled tubing according to the present invention has the following advantages:

[0015] This invention controls valve movement by sensing changes in the thickness of the casing coupling, converting casing information into fluid pulses that are fed back to the ground to correct the tool's descent depth. Since this tool achieves its calibration purpose by sensing changes in the thickness of the casing coupling, no pre-designed steps are needed on the casing, and there are no protruding positioning plates on the tool surface. This allows the tool to achieve precise positioning while reducing the risk of obstruction, thus realizing accurate depth positioning for coiled tubing tools. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the installation of the wireless coupling positioner device for continuous tubing of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the wireless coupling positioner device for continuous tubing of the present invention;

[0019] Figure 3 This is a schematic diagram of the electromagnetic induction module;

[0020] Figure 4 This is a schematic diagram of the solenoid valve body module when the flow channel is open;

[0021] Figure 5 This is a schematic diagram of the solenoid valve body module when the flow channel is closed and a pulse state is generated;

[0022] Figure 6 This is a schematic diagram of the lower valve body module in the self-locking state when it is open;

[0023] Figure 7 This is a schematic diagram of the lower valve body module in the self-locking state when it is open;

[0024] In the diagram, 1—shock-absorbing spring, 2—electromagnetic induction coil, 3—buffer pad, 4—electromagnetic induction transmission, 5—signal processing unit, 6—solenoid valve control unit, 7—solenoid valve body, 8—positioner outer cylinder, 9—piston valve body, 10—support spring, 11—ejector piston, 12—shear pin, 13—ejector, 14—locking sleeve, 15—sealing valve plate, 16—support spring. Detailed Implementation

[0025] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] like Figures 1-7 As shown, the wireless coupling positioner device for continuous tubing of the present invention includes an electromagnetic induction module, a signal control module, an electromagnetic valve body module, a ground system module, and a bottom valve body module.

[0027] The electromagnetic induction module includes an electromagnetic induction coil 2, a shock-absorbing spring 1, a buffer pad 3, and an electromagnetic induction transmission 4. The entire electromagnetic induction module adopts an eccentric design, retaining the central flow channel through hole of the positioner. The shock-absorbing spring 1 and the buffer pad 3 are designed on both sides of the electromagnetic induction coil 2 to ensure the reliability of the electromagnetic induction module in the positioner.

[0028] The control module includes a signal processing unit 5 and a solenoid valve control unit 6. Its main function is to identify and process electromagnetic induction signals and convert the judgment signals into the action of the solenoid valve body 7.

[0029] The solenoid valve body module includes a solenoid valve body 7, a piston valve body 9, and a support spring 10. The solenoid valve body 7 is the pilot valve of the piston valve body 9. Its structure is a two-position three-way valve body used to connect the flow channels inside and outside the oil pipe. Its main function is to control the flow channel and change the state of the lower piston valve body 9. In the initial state, the piston valve body 9 is subjected to annular pressure on both sides and remains in the upper position under the action of the support spring 10, at which time the bypass flow channel is open. When the solenoid valve body 7 receives a signal and changes position briefly, it controls the flow channel change. The pressure on the upper part of the piston valve body 9 becomes the pressure inside the oil pipe, creating a pressure difference between the two ends of the piston valve body 9. This pressure difference overcomes the force of the support spring 10, causing the piston valve body 9 to move downwards, closing the positioner bypass flow channel, and causing the positioner to generate a pressure pulse.

[0030] The lower valve body module includes a pin piston 11, a shear pin 12, a pin 13, a sealing valve plate 15, a locking sleeve 14, and a support torsion spring 16. Initially, the pin piston 11 and pin 13 press the sealing valve plate 15 tightly against the lower step, closing the lower flow channel. After the positioner completes its positioning operation, hydraulic pressure can be used to open the lower flow channel while simultaneously closing the bypass flow channel, allowing the tool string to operate normally. When the lower valve body needs to be opened, simply increase the ground pump's discharge rate and pump pressure. At this time, due to the cavity formed by the pin piston 11 and the outer cylinder, the pressure areas at both ends of the piston are different. When the pressure difference increases to a certain level, the pin piston 11 shears the shear pin 12, and the pin piston 11 moves upwards with the pin 13, closing the upper bypass flow channel of the positioner. At the same time, the ejector pin 13 that presses the sealing valve plate 15 retracts, and the sealing valve plate 15 opens under the action of the torsion spring 16 supported by the torsion spring. The fully opened sealing valve plate 15 is fixed by the locking sleeve to ensure that the flow channel will not close due to the action of the fluid when it is open.

[0031] The ground system module includes a pressure sensing module and a depth recording module. The pressure sensing module detects and records coiled tubing pump pressure pulses, and processes the pump pressure signals. Upon detecting a pressure pulse signal, the coiled tubing's entry depth is corrected based on the casing coupling information table to obtain the precise depth at which the positioner is lowered.

[0032] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A coiled tubing wireless collar locator apparatus, characterized by, The positioning device comprises an electromagnetic induction module, a signal control module, an electromagnetic valve body module and a lower valve body module, the electromagnetic induction module comprises an electromagnetic induction coil and an electromagnetic induction transmission, the signal control module comprises a signal processing unit and an electromagnetic valve control unit, the signal processing unit is used for identifying and processing electromagnetic induction signals, and the electromagnetic valve control unit is used for converting a judgment signal into an action of the electromagnetic valve body; the electromagnetic valve body module comprises an electromagnetic valve body, a piston valve body and a support spring, the electromagnetic valve body is a pilot valve of the piston valve body, the electromagnetic valve body is a two-position three-way valve body, the electromagnetic valve body is connected with flow channels inside and outside the oil pipe, and is used for controlling the flow channels to change the state of the lower piston valve body; in an initial state, the piston valve body bears annular space pressure on both sides, and is kept in an upper state under the action of the support spring, and at this time, a bypass flow channel is in an open state; when the electromagnetic valve body receives a signal and changes position in a short time, the electromagnetic valve body controls the flow channels to change, pressure on the upper part of the piston valve body becomes the pressure inside the oil pipe, at this time, pressure differences are generated on both ends of the piston valve body, the pressure differences overcome the action force of the support spring, so that the piston valve body moves downward, the bypass flow channel of the positioning device is closed, and pressure pulses of the positioning device are generated. The lower valve body module comprises a needle piston, a shear pin, a needle, a sealing valve plate, a locking sleeve and a support torsional spring, in an initial state, the needle piston and the needle press the sealing valve plate against a lower step, and close the lower flow channel; after the positioning device completes a positioning operation, the lower flow channel is opened by using hydraulic pressure, and the bypass flow channel is closed, so that a tool string normally operates; when the lower valve body needs to be opened, only the ground pump displacement and pump pressure need to be increased, at this time, due to a cavity formed by the needle piston and an outer cylinder, pressure areas on both ends of the piston are different, when the pressure difference increases to a certain degree, the needle piston shears the shear pin, the needle piston moves upward with the needle, the needle piston closes the bypass flow channel of the positioning device, the needle retreats and presses the sealing valve plate, the sealing valve plate is opened under the action of the support torsional spring, the completely opened sealing valve plate is fixed by the locking sleeve, and the opening of the flow channel is ensured not to be closed due to fluid action.

2. The coiled tubing wireline collar locator apparatus of claim 1, wherein, The electromagnetic induction module is eccentrically arranged.

3. The coiled tubing wireline collar locator apparatus of claim 1, wherein, Shock-absorbing springs and buffer pads are arranged on both sides of the electromagnetic induction coil.

4. The coiled tubing wireline collar locator apparatus of claim 1, wherein, A pressure sensing module arranged on the ground and a depth recording module are further arranged, the pressure sensing module is used for detecting and recording pump pressure pulse conditions of the coiled tubing, detecting and processing pump pressure signals, correcting the downhole depth of the coiled tubing according to a casing collar information table when a pressure pulse signal is detected, and obtaining the accurate depth of the positioning device.

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