Setting tool

Abstract

The utility model provides a setting tool which comprises a driving mechanism, a clutch, a ball screw, an outer sleeve, a movable nut, a plunger block, a liquid storage area, an electromagnetic valve, an upper piston, a connecting rod, a lower piston, a push rod, a center pipe and a cylinder. The driving mechanism, the clutch, the ball screw, the movable nut, the plunger block, the liquid storage area, the electromagnetic valve, the upper piston, the connecting rod, the lower piston and the push rod are all installed in the outer sleeve, the driving mechanism is connected with the clutch, the clutch is connected with the ball screw, the ball screw is in transmission connection with the movable nut, the movable nut is connected with the plunger block, and the plunger block is installed in the liquid storage area in a sliding mode. The upper piston is connected with the lower piston through a connecting rod, the electromagnetic valve is communicated with the upper piston and the lower piston, the lower piston is connected with the push rod, the center pipe is connected with the outer sleeve, the push rod is installed in the center pipe in a sliding mode, and the cylinder is arranged on the center pipe in a sleeved mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of downhole key tool for oil and natural gas drilling and fracturing, and particularly relates to a setting tool. BACKGROUND

[0002] With the deep development of oil fields, the number of medium-deep wells and ultra-deep wells in unconventional reservoirs is increasing, and the development of deep oil and gas resources faces the characteristics of deep wells, high temperature, high pressure, high stress, and high carbon dioxide, and the oil production conditions are deteriorating, so there are higher requirements for the stimulation technology of unconventional reservoirs. At present, in the development of unconventional reservoir stimulation, downhole plugging tools have become the mainstream tools, so the successful setting of downhole plugging tools has become a key technical problem to ensure the stimulation development of unconventional oil and gas reservoirs.

[0003] The commonly used downhole setting tools at present are divided into cable pumping explosive combustion driving piston setting, coiled tubing pumping hydraulic power tool setting, and cable pumping pure electric setting tool setting. Among them, the cable pumping explosive combustion driving piston setting mainly ignites the detonator explosive through the cable to transmit the electric signal, and the detonator explosive explodes in a closed space to drive the piston to move and complete the setting. However, on the one hand, the detonator is a flammable and explosive material, which has certain risks in the process of product transportation and use, and the detonator explosive combustion produces large vibration, and the stability in use is poor. The coiled tubing pumping hydraulic power tool setting mainly connects the downhole setting tool through the coiled tubing, reaches the predetermined position, and then puts the metal ball in the coiled tubing to form a closed pressure difference in the setting tool to drive the piston to move and complete the setting. However, the ground pump truck is needed as the hydraulic source, the construction is more complicated, and the length of the coiled tubing limits part of the fracturing construction, and the risk in the pumping process is larger. The cable pumping pure electric setting tool setting mainly connects the pure electric setting tool through the cable to reach the predetermined position, transmits the electric signal through the cable, and the electric setting tool starts to act to complete the setting, which is convenient for construction and has high efficiency.

[0004] However, the common electric setting tool does not design a motor safety separation mechanism, and there is a risk of early setting of the downhole tool caused by the misoperation of the motor during the process of pumping the tool into the well, and the setting force provided by the common electric setting tool is small, which cannot meet the use requirements of the large releasing force downhole tool, so it is urgent to design a new type of electric setting tool with low risk, large releasing force and convenient construction to meet the fracturing requirements of unconventional oil and gas reservoirs. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problems of the prior art and provides a setting tool.

[0006] The utility model discloses a technical scheme that solves the above technical problem as follows: a setting tool, comprising: a driving mechanism, a clutch, a ball screw, an outer sleeve, a moving nut, a plunger block, a liquid storage area, a solenoid valve, an upper piston, a connecting rod, a lower piston, a push rod, a central pipe and a cylinder, the driving mechanism, the clutch, the ball screw, the moving nut, the plunger block, the liquid storage area, the solenoid valve, the upper piston, the connecting rod, the lower piston and the push rod are all installed in the outer sleeve, the driving mechanism is connected with the clutch, the clutch is connected with the ball screw, the ball screw is in transmission connection with the moving nut, the moving nut is connected with the plunger block, the plunger block is slidingly installed in the liquid storage area, the liquid storage area is in communication with the solenoid valve, the upper piston is connected with the lower piston through the connecting rod, the solenoid valve is in communication with the upper piston and the lower piston, the lower piston is connected with the push rod, the central pipe is connected with the outer sleeve, the push rod is slidingly installed in the central pipe, and the cylinder is sleeved on the central pipe.

[0007] The utility model discloses beneficial effect technical scheme is: clutch is used to realize the separation and combination between upper and lower shafts in the operation process, and the clutch is always in the state of separation in the downstroke of the setting tool, so that when the driving mechanism is operated improperly, the lower end will not operate, only when the setting tool is lowered to the predetermined position, the clutch acts, realizes power transmission, ensures that the wellbore temporary plugging tool will not be prematurely set in the pumping process. Ensure that the electric setting tool can be safely lowered during the lowering process, and the bridge plug setting tool will not operate prematurely. The liquid path part converts mechanical power into flexible power and pressurizes multiple times, and then converts the mechanical power again, to ensure the pressure requirement in the setting process. The electromagnetic valve is used to ensure the controllable operation of the liquid, and the initial electromagnetic valve is in the closed state to ensure the closure of the liquid in the liquid storage area. When the moving nut is operated up and down, the electromagnetic valve is opened to realize the downward operation of the liquid to the piston or the reverse suction of the liquid from the piston part to the liquid storage area. The piston is mainly the high-pressure liquid action area, and the action force is converted through the action area. The connecting rod is a connecting component of the upper piston and the lower piston, can realize the transmission of the action force of the two pistons, realizes the simultaneous operation of the upper and lower pistons, ensures the setting force requirement in the setting process through the simultaneous action of the upper and lower pistons, and realizes effective setting. The ball screw is matched with the multi-stage piston structure design, realizes the conversion of the rotary motion of the driving mechanism into the reciprocating motion of the piston, effectively increases the releasing strength through the multi-stage hydraulic piston pressurizing structure, and improves the stability of the setting process. The effective mechanical power converted by the liquid path part is separated from the effective action of the central pipe and the cylinder through the structure, to ensure the effective realization of the setting process. The safety of the setting tool in the complex operation environment is improved, the risk of premature setting of the setting tool in the pumping process is avoided, the problem that the downhole plugging tool cannot be smoothly set due to the insufficient setting force of the downhole setting tool is solved, and the stability and reliability of the fracturing construction are improved.

[0008] Further, a speed reducer is installed between the driving mechanism and the clutch, the driving mechanism is connected with the speed reducer through a first shaft coupling, and the speed reducer is connected with the clutch.

[0009] The beneficial effect of the above further technical scheme is that the speed reducer is used to reduce the running speed and improve the output torque. The motor output shaft is connected with the speed reducer through a first shaft coupling. The motor output shaft drives the input shaft of the speed reducer to rotate together. The speed reducer is a planetary speed reducer, which can realize the change of the input and output shafts in the direction of 180 degrees. After multi-stage reduction of the speed reducer, the output torque is greatly improved.

[0010] Further, one end of the outer sleeve is provided with a connecting head for connecting with the upper end pumping cable head, and a first O-shaped sealing ring is installed between the connecting head and the outer sleeve.

[0011] The beneficial effect of the further technical scheme is that the connecting head is used for connecting the setting tool with the cable head or other equipment, and realizes the matching of the setting tool with other components.

[0012] Further, the clutch is connected with the ball screw through a second coupling, the ball screw is rotatably installed in the outer sleeve through a bearing seat, and the ball screw is in transmission connection with the moving nut through a screw thread.

[0013] The beneficial effect of the further technical scheme is that the output shaft of the clutch is connected with the input shaft of the ball screw through the second coupling, and the upper end of the ball screw is fixed in the bearing seat, so that the stability of the ball screw in the running process is ensured.

[0014] Further, the liquid storage area is provided with liquid, the electromagnetic valve is in communication with one end of the upper piston through a first liquid channel, and the electromagnetic valve is in communication with one end of the lower piston through a second liquid channel; a limiting seat is installed in the outer sleeve and located between the upper piston and the lower piston.

[0015] The beneficial effect of the further technical scheme is that the lower end of the plunger block is the liquid storage area, and the liquid storage area is filled with liquid such as water and oil. The lower end of the liquid outlet is connected with the electromagnetic valve, the outlet of the electromagnetic valve is divided into two paths, one path is in communication with the upper end of the upper piston, and the other path is in communication with the upper end of the lower piston through the connecting rod. The limiting seat is used for limiting the effective stroke of the piston.

[0016] Further, the upper piston and the connecting rod are provided with a second liquid channel, the connecting rod is provided with a branch liquid channel, the branch liquid channel is in communication with one end of the lower piston adjacent to the upper piston and the second liquid channel on the connecting rod, the second liquid channel on the connecting rod is in communication with the second liquid channel on the upper piston, the second liquid channel on the upper piston is in communication with the electromagnetic valve, and the electromagnetic valve is in communication with one end of the upper piston away from the lower piston.

[0017] The beneficial effect of the further technical scheme is that when the ball screw runs in the forward direction, the plunger block moves downward, at this time, the electromagnetic valve is in a closed state, when the liquid pressure of the liquid storage area reaches the predetermined pressure of the electromagnetic valve, the electromagnetic valve is opened, the liquid quickly flows to the upper end of the upper piston, and the upper piston and the lower piston run downward through the connecting rod.

[0018] Further, the push rod is connected with a connecting block, the connecting block is connected with the barrel, the other end of the sleeve is installed with a lower limit seat, the central tube is connected with the lower limit seat, and the middle part of the central tube is provided with a long slot.

[0019] The beneficial effect of the further technical scheme is that the push rod is a multi-stage piston effective power output component. The connecting block is connected with the push rod and runs simultaneously with the push rod. The central tube is located outside the push rod and has a tubular structure. The right end is screwed with the lower limit seat to ensure that the position is unchanged. The middle part is provided with a long slot and has a certain length to ensure the stroke of the setting process. The barrel is located outside the central tube and moves with the push rod under the action of the connecting block and the connecting rod. When the upper piston and the lower piston move downward, the push rod moves downward at the same time. The connecting block connected to the push rod is connected to the barrel through the long slot. Therefore, the push rod will drive the connecting block and the barrel to move at the same time, realize the effect that the central tube is stationary and the barrel moves downward, and meet the setting requirement of the wellbore temporary plugging tool.

[0020] Further, a second O-shaped sealing ring is sleeved on the plunger block, and the second O-shaped sealing ring is located between the plunger block and the sleeve.

[0021] The beneficial effect of the further technical scheme is that the second O-shaped sealing ring improves the sealing performance of the liquid storage area, the plunger block and the sleeve, prevents the liquid in the liquid storage area from leaking to the side of the moving nut, and improves the stability and reliability of the setting tool.

[0022] Further, the moving nut is connected with a connecting sleeve through a screw, the connecting sleeve is connected with a protective sleeve, the protective sleeve is connected with the plunger block, the sleeve is installed with an upper limit switch and a lower limit switch, the screw protrudes from the connecting sleeve, and the upper limit switch and the lower limit switch are located on the movement track of the screw.

[0023] The beneficial effect of the further technical scheme is that when the ball screw runs forward, the moving nut moves downward and pushes the connecting sleeve to further push the protective sleeve, and then pushes the plunger block to move downward. When the screw on the outer circle of the connecting sleeve hits the lower limit switch, the motor stops running. Similarly, when the ball screw reverses, the moving nut moves upward, and the connecting sleeve, the protective sleeve and the plunger block move upward at the same time. When the screw on the outer circle of the connecting sleeve hits the upper limit switch, the ball screw stops running and the moving nut stops running.

[0024] Further, an electric control device is installed adjacent to the driving mechanism, the ball screw is connected with an encoder through a third coupling, and the electric control device is connected with the driving mechanism, the clutch, the encoder and the electromagnetic valve respectively.

[0025] The beneficial effects of the further technical scheme are that the lower end of the ball screw is connected with the encoder through the third coupling, the input shaft of the encoder rotates together with the ball screw through the third coupling, the number of rotations of the ball screw is recorded and fed back, the running length of the moving nut is calculated, the setting-in stroke of the electric tool is further determined, and the setting-in effect is finally determined. The electric control device of the motor transmission part transmits and collects control signals to the motor, the clutch, the encoder and the electromagnetic valve through wires. The electric control device is used for monitoring and adjusting the operation of the motor, controlling the movement direction of the motor, the combination of the clutch and the opening and closing of the electromagnetic valve, monitoring the size of the torque and the data of the encoder during the operation, and the like, to ensure the normal operation and controllable process of the transmission process. The encoder feeds back the running displacement of the outer cylinder of the execution part in time through data conversion, and confirms whether the setting-in process is effective.

[0026] The advantages of the additional aspects of the utility model will be partially given in the following description, some will become apparent from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The structure schematic view of the setting-in tool provided for the utility model embodiment.

[0028] Figure 2 The structure schematic view of the motor transmission part provided for the utility model embodiment.

[0029] Figure 3 The structure schematic view of the liquid path part provided for the utility model embodiment.

[0030] Figure 4 The structure schematic view of the execution part provided for the utility model embodiment.

[0031] BRIEF DESCRIPTION OF DRAWINGS: 1, connector; 2, first O-shaped sealing ring; 3, electric control device; 4, motor; 5, first coupling; 6, speed reducer; 7, clutch; 8, second coupling; 9, bearing seat; 10, ball screw; 11, outer sleeve; 12, moving nut; 13, connecting sleeve; 14, screw; 15, upper limit switch; 16, lower limit switch; 17, protective sleeve; 18, third coupling; 19, encoder; 20, plunger block; 21, second O-shaped sealing ring; 22, liquid storage area; 23, electromagnetic valve; 24, first liquid channel; 25, second liquid channel; 26, upper piston; 27, connecting rod; 28, limit seat; 29, liquid distribution channel; 30, lower piston; 31, push rod; 32, lower limit seat; 33, center tube; 34, connecting block; 35, long slot; 36, cylinder. DETAILED DESCRIPTION

[0032] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0033] As shown in Figures 1 to 4 The utility model discloses a setting tool, including: drive mechanism, clutch 7, ball screw 10, outer sleeve 11, moving nut 12, plunger block 20, liquid storage area 22, electromagnetic valve 23, upper piston 26, connecting rod 27, lower piston 30, push rod 31, central tube 33, barrel 36, drive mechanism, clutch 7, ball screw 10, moving nut 12, plunger block 20, liquid storage area 22, electromagnetic valve 23, upper piston 26, connecting rod 27, lower piston 30 and push rod 31 are installed in outer sleeve 11, drive mechanism is connected with clutch 7, clutch 7 is connected with ball screw 10, ball screw 10 is transmission connection with moving nut 12, moving nut 12 is connected with plunger block 20, plunger block 20 is slidably installed in liquid storage area 22, liquid storage area 22 is communicated with electromagnetic valve 23, upper piston 26 is connected with lower piston 30 through connecting rod 27, electromagnetic valve 23 is communicated with upper piston 26 and lower piston 30, lower piston 30 is connected with push rod 31, central tube 33 is connected with outer sleeve 11, push rod 31 is slidably installed in central tube 33, barrel 36 is set on central tube 33.

[0034] The beneficial effect of the technical scheme of the utility model is that the clutch is used for realizing the separation and combination between the upper shaft and the lower shaft during operation, the clutch is always in the separated state during the lowering process of the setting tool, so that when the driving mechanism operates improperly, the lower end will not operate, only when the setting tool is lowered to the predetermined position, the clutch operates to realize power transmission, ensuring that the wellbore temporary plugging tool will not be prematurely set during the pumping process. The electric setting tool can be safely lowered during the lowering process, and the bridge plug setting tool will not operate prematurely. The liquid path part converts mechanical power into flexible power and pressurizes multiple times, and then converts the mechanical power again, ensuring the pressure requirement during the setting process. The electromagnetic valve is used for ensuring the controllable operation of the liquid, the initial electromagnetic valve is in the closed state, ensuring the closure of the liquid in the liquid storage area, when the moving nut is operated up and down, the electromagnetic valve is opened to realize the downward operation of the liquid to the piston or the reverse suction of the liquid from the piston part to the liquid storage area. The piston is mainly the high-pressure liquid action area, and the action force is converted through the action area. The connecting rod is a connecting part of the upper piston and the lower piston, and can realize the transmission of the action force of the two pistons, realizes the simultaneous operation of the upper and lower pistons, ensures the setting force requirement during the setting process, and realizes effective setting. The ball screw is matched with the multi-stage piston structure design, realizes the conversion of the rotary motion of the driving mechanism to the reciprocating motion of the piston, effectively increases the releasing strength through the multi-stage hydraulic piston pressurization structure, and improves the stability of the setting process. The execution part realizes the effective action separation of the central pipe and the cylinder through the structure of the effective mechanical power converted by the liquid path part, ensuring the effective realization of the setting process. The safety of the setting tool in the complex operation environment is improved, the risk of premature setting of the setting tool during the pumping process is avoided, the problem that the downhole plugging tool cannot be smoothly set due to the insufficient setting force of the downhole setting tool is solved, and the stability and reliability of the fracturing construction are improved.

[0035] The utility model discloses a kind of setting tools for the field of petroleum, natural gas reservoir reconstruction staged fracturing, and can be electric fracturing tool.The electric fracturing tool can effectively improve the safety of setting tool in complex operation environment, avoid the risk of premature setting of setting tool during pumping process, solve the problem that downhole plugging tool cannot be smoothly set due to the insufficient setting force of downhole setting tool, and improve the stability and reliability of fracturing construction.

[0036] The utility model discloses an embodiment provides a kind of setting tool, can be electric setting tool, mainly includes: connector 1, motor drive part, liquid path part and execution part.Motor drive part mainly includes: electric control equipment 3, motor 4, speed reducer 6, clutch 7, transmission screw rod (ball screw 10), moving nut 12, encoder 19 etc.;Liquid path part mainly includes: liquid storage area 22, electromagnetic valve 23, liquid channel, piston, connecting rod 27, limit seat 28 etc.;Execution part mainly includes: push rod 31, connecting block 34, central tube 33, barrel 36 etc.

[0037] Connector 1 is mainly used for the connection of electric setting tool (setting tool) and cable head or other equipment, realizes the matching of electric setting tool and other components.

[0038] Motor drive part, mainly provides mechanical power, provides initial power for next liquid path part.Electric control equipment 3 is mainly for monitoring and adjusting the operation of motor 4, controls the movement direction of motor 4, the combination of clutch 7, the opening and closing of electromagnetic valve 23, monitors the size of torque in operation process, the data of encoder 19 etc., ensures the normal operation and process controllable of transmission process.Speed reducer 6 realizes to reduce operating speed, improves output torque.Clu 7 realizes the separation and combination between upper and lower shafts in operation process, ensures that electric setting tool can be safely lowered during lowering process, and bridge plug setting tool will not run in advance.Encoder 19 converts data in time and feeds back the running displacement of the outer cylinder of execution part, and confirms whether the setting process is effective.

[0039] Liquid path part, mechanical power is converted into flexible power, and is boosted several times, and is converted into mechanical power again, to ensure the demand for pressure in setting process.Electromagnetic valve 23 is mainly to ensure the controllable operation of liquid, initial electromagnetic valve 23 is in closed state, to ensure the closure of liquid in liquid storage area 22, when moving nut 12 runs up and down, electromagnetic valve 23 is opened, to realize the downward operation of liquid to piston or the reverse back absorption of liquid from piston part to liquid storage area 22.Piston is mainly the action area of high-pressure liquid, and the force conversion is realized through action area.Connecting rod 27 is the connecting component of two pistons (upper piston 26 and lower piston 30), can realize the force transmission of two pistons, realizes the simultaneous operation of two pistons, and guarantees the demand for setting force in setting process through the simultaneous action of two pistons, realizes effective setting.Limit seat 28 is mainly used for limiting the effective stroke of piston.

[0040] The execution part is mainly to separate the effective action of the center tube 33 and the cylinder body 36 through the structure, so as to ensure the effective implementation of the setting process. The push rod 31 is a multi-stage piston effective power output component. The connecting block 34 is connected with the push rod 31 and runs simultaneously with the push rod 31. The center tube 33 is located outside the push rod 31 and has a tubular structure. The right end is screwed with the lower limit seat 32 to ensure that the position is unchanged. The middle part is provided with a long hole and has a certain length to ensure the stroke of the setting process. The cylinder body 36 is located outside the center tube 33 and moves with the push rod 31 under the action of the push rod 31 and the connecting rod 27.

[0041] As shown in Figures 1 to 4 Further, a speed reducer 6 is installed between the driving mechanism and the clutch 7. The driving mechanism is connected with the speed reducer 6 through a first shaft coupling 5, and the speed reducer 6 is connected with the clutch 7. The speed reducer 6 is a planetary reducer.

[0042] The beneficial effects of the above further technical solutions are: the speed reducer is used to reduce the running speed and improve the output torque. The motor output shaft is connected with the speed reducer through the first shaft coupling. The motor output shaft drives the input shaft of the speed reducer to rotate together. The speed reducer is a planetary reducer, which can realize the change of the input and output shafts in the direction of 180°. After multi-stage reduction of the speed reducer, the output torque is greatly improved.

[0043] As shown in Figures 1 to 4 Further, one end of the outer sleeve 11 is provided with a connecting head 1 for connecting with the upper end pumping cable head. A first O-shaped sealing ring 2 is installed between the connecting head 1 and the outer sleeve 11. The driving mechanism is an electric motor 4.

[0044] The beneficial effects of the above further technical solutions are: the connecting head is used to connect the setting tool with the cable head or other equipment, and realize the matching of the setting tool with other components. The driving mechanism is used to provide mechanical power. The electric setting tool is connected with the upper end pumping cable head through the connecting head. The first O-shaped sealing ring is installed at the connecting head and the outer sleeve, which can realize the sealing guarantee of the upper end area of the electric control equipment.

[0045] As shown in Figures 1 to 4 Further, the clutch 7 is connected with the ball screw 10 through a second shaft coupling 8. The ball screw 10 is rotatably installed in the outer sleeve 11 through a bearing seat 9. The ball screw 10 is drivingly connected with the moving nut 12 through threads.

[0046] The beneficial effect of the further technical scheme is that the output shaft of the clutch is connected with the input shaft of the ball screw through the second shaft coupling. The upper end of the ball screw is fixed in the bearing seat, and the connection of the bearing seat ensures the stability of the ball screw during operation.

[0047] As shown in Figures 1 to 4 , further, the liquid storage area 22 is provided with liquid, the electromagnetic valve 23 is communicated with one end of the upper piston 26 through the first liquid channel 24, and the electromagnetic valve 23 is communicated with one end of the lower piston 30 through the second liquid channel 25; the outer sleeve 11 is provided with a limiting seat 28, and the limiting seat 28 is located between the upper piston 26 and the lower piston 30.

[0048] The beneficial effect of the further technical scheme is that the lower end of the plunger block is a liquid storage area, and water, oil or other liquid is injected into the liquid storage area. The lower end of the liquid outlet is connected with the electromagnetic valve, and the outlet of the electromagnetic valve is divided into two ways, one of which is communicated with the upper end of the upper piston, and the other is communicated with the upper end of the lower piston through the connecting rod. The limiting seat is used to limit the effective stroke of the piston.

[0049] As shown in Figures 1 to 4 , further, the upper piston 26 and the connecting rod 27 are provided with the second liquid channel 25, the connecting rod 27 is provided with the liquid distribution channel 29, the liquid distribution channel 29 is communicated with one end of the lower piston 30 adjacent to the upper piston 26 and the second liquid channel 25 on the connecting rod 27, the second liquid channel 25 on the connecting rod 27 is communicated with the second liquid channel 25 on the upper piston 26, and the second liquid channel 25 on the upper piston 26 is communicated with the electromagnetic valve 23; the electromagnetic valve 23 is communicated with one end of the upper piston 26 away from the lower piston 30 through the first liquid channel 24.

[0050] The beneficial effect of the further technical scheme is that when the ball screw is running forward, the plunger block moves downward, at this time the electromagnetic valve is in a closed state, when the liquid pressure of the liquid storage area reaches the predetermined pressure of the electromagnetic valve, the electromagnetic valve is opened, and the liquid flows quickly to the upper end of the upper piston. The upper piston and the lower piston run downward through the connecting rod.

[0051] As shown in Figures 1 to 4 , further, the push rod 31 is connected with a connecting block 34, the connecting block 34 is connected with the barrel 36, the other end of the outer sleeve 11 is provided with a lower limiting seat 32, the center pipe 33 is connected with the lower limiting seat 32, and the middle part of the center pipe 33 is provided with a long hole 35.

[0052] The beneficial effect of the further technical scheme is that the push rod is a multi-stage piston effective power output component. The connecting block is connected with the push rod and runs simultaneously with the push rod. The center tube is located outside the push rod and has a tubular structure, and the right end is screwed with the lower limit seat to ensure that the position is unchanged. The middle part is provided with a long slot and has a certain length to ensure the stroke of the setting process. The cylinder is located outside the center tube and moves with the push rod under the action of the connecting block and the connecting rod. When the upper piston and the lower piston run downward, the push rod moves downward, and the connecting block connected with the push rod is connected with the cylinder through the long slot, so that the push rod drives the connecting block and the cylinder to move simultaneously, the center tube is stationary, and the cylinder moves downward, which meets the setting requirement of the wellbore temporary plugging tool.

[0053] As shown in Figures 1 to 4 , further, the plunger block 20 is sleeved with a second O-shaped sealing ring 21, and the second O-shaped sealing ring 21 is located between the plunger block 20 and the outer sleeve 11.

[0054] The beneficial effect of the further technical scheme is that the second O-shaped sealing ring is arranged to improve the sealing performance of the liquid storage area, the plunger block and the outer sleeve, prevent the liquid in the liquid storage area from leaking to the side of the moving nut, and improve the stability and reliability of the setting tool.

[0055] As shown in Figures 1 to 4 , further, the moving nut 12 is connected with a connecting sleeve 13 through a screw 14, the connecting sleeve 13 is connected with a protective sleeve 17, the protective sleeve 17 is connected with the plunger block 20, the upper limit switch 15 and the lower limit switch 16 are installed on the outer sleeve 11, the screw 14 protrudes from the connecting sleeve 13, and the upper limit switch 15 and the lower limit switch 16 are located on the movement track of the screw 14.

[0056] The beneficial effect of the further technical scheme is that when the ball screw runs forward, the moving nut moves downward and pushes the connecting sleeve to further push the protective sleeve, and then pushes the plunger block to move downward. When the screw on the outer circle of the connecting sleeve hits the lower limit switch, the motor stops running. Similarly, when the ball screw reverses, the moving nut moves upward, and the connecting sleeve, the protective sleeve and the plunger block move upward at the same time. When the screw on the outer circle of the connecting sleeve hits the upper limit switch, the ball screw stops running and the moving nut stops running.

[0057] As shown in Figures 1 to 4 , further, an electric control device 3 is installed adjacent to the driving mechanism, the ball screw 10 is connected with an encoder 19 through a third coupling 18, and the electric control device 3 is connected with the driving mechanism, the clutch 7, the encoder 19 and the electromagnetic valve 23 respectively.

[0058] The beneficial effects of the further technical scheme are that the lower end of the ball screw is connected with the encoder through the third coupling, the input shaft of the encoder rotates with the ball screw through the third coupling, the number of rotations of the ball screw is recorded and fed back, the running length of the moving nut is calculated, the setting-in stroke of the electric tool is further determined, and the setting-in effect is finally determined. The electric control equipment of the motor transmission part transmits and collects control signals to the motor, the clutch, the encoder and the electromagnetic valve through wires. The electric control equipment is used for monitoring and adjusting the operation of the motor, controlling the movement direction of the motor, the combination of the clutch and the opening and closing of the electromagnetic valve, monitoring the size of the torque and the data of the encoder during the operation, and the like, to ensure the normal operation and controllable process of the transmission process. The encoder feeds back the running displacement of the outer cylinder of the execution part in time through data conversion, and confirms whether the setting-in process is effective.

[0059] As shown in Figures 1 to 4 The electric setting-in tool (setting-in tool) is connected with the upper end pumping cable head through the connecting head 1, the connecting head 1 is provided with the first O-shaped sealing ring 2 at the matching position of the outer sleeve 11, and the sealing of the upper end region of the electric control equipment 3 can be realized. The electric control equipment 3 of the motor transmission part transmits and collects control signals to the motor (motor 4), the clutch 7, the encoder 19 and the electromagnetic valve 23 through wires. When the motor 4 receives the running signal sent by the electric control equipment 3, the motor 4 starts to operate, and the output shaft of the motor 4 is connected with the input shaft of the speed reducer 6 through the first coupling 5. The output shaft of the motor 4 drives the input shaft of the speed reducer 6 to rotate together, the speed reducer 6 is a planetary reducer, and the change of the input and output shafts in the direction of 180° can be realized. After the multi-stage reduction of the speed reducer 6, the output torque is greatly improved, the speed reducer 6 is connected with the clutch 7 at the lower end, and the intelligent switching of the power between the upper end power input end and the lower end running part can be realized. The clutch 7 is always in the separated state during the downward process of the electric setting-in tool, so that when the motor 4 operates improperly, the lower end will not operate, and only when the setting-in tool is placed to the predetermined position, the clutch 7 is controlled to act, the power transmission is realized, and it is ensured that the wellbore temporary plugging tool will not be prematurely set-in during the pumping process.

[0060] The output shaft of the clutch 7 is connected with the input shaft of the ball screw 10 through the second coupling 8. The upper end of the ball screw 10 is fixed in the bearing seat 9, and the connection of the bearing seat 9 ensures the stability of the ball screw 10 during operation. The lower end of the ball screw 10 is connected with the encoder 19 through the third coupling 18, and the input shaft of the encoder 19 rotates together with the ball screw 10 through the encoder coupling (the third coupling 18), records and feeds back the number of rotations of the ball screw 10, so that the running length of the moving nut 12 is calculated, the setting stroke of the electric tool is further determined, and the setting effect is finally determined. The moving nut 12 is connected with the ball screw 10 through threads, the lower end of the moving nut 12 is fixed with the connecting sleeve 13 through the screw 14, the lower end of the connecting sleeve 13 is connected with the protective sleeve 17 through a nut, and the outer sleeve 11 is provided with the upper limit switch 15 and the lower limit switch 16. When the ball screw 10 rotates forward, the moving nut 12 moves downward, and simultaneously pushes the connecting sleeve 13 to further push the protective sleeve 17 through threads, and then pushes the plunger block 20 to move downward. When the outer circular screw 14 of the connecting sleeve 13 hits the lower limit switch 16, the motor 4 stops rotating.

[0061] The lower end of the plunger block 20 is a liquid storage area 22, and the liquid storage area 22 is filled with water, oil and the like. The lower end of the liquid storage area 22 is provided with a liquid outlet, and the lower end of the liquid outlet is connected with an electromagnetic valve 23. The outlet of the electromagnetic valve 23 is divided into two paths, one of which is connected with the upper end of an upper piston 26, and the other of which is connected with the upper end of a lower piston 30 through a connecting rod 27.

[0062] When the ball screw 10 rotates forward, the plunger block 20 moves downward, and at this time the electromagnetic valve 23 is in a closed state. When the liquid pressure of the liquid storage area 22 reaches a predetermined pressure of the electromagnetic valve 23, the electromagnetic valve 23 is opened, and the liquid quickly flows to the upper end of the upper piston 26. The upper piston 26 and the lower piston 30 move downward through the connecting rod 27. The end point of each piston is provided with a limit seat 28, so as to limit the movement stroke of the piston.

[0063] When the two-stage piston (the upper piston 26 and the lower piston 30) moves downward, the push rod 31 also moves downward. The connecting block 34 connected with the push rod 31 is connected with the cylinder body 36 through a long groove, so that the push rod 31 drives the connecting block 34 and the cylinder body 36 to move together, the center pipe 33 is not moved, the cylinder body 36 moves downward, and the well hole temporary plugging tool setting requirement is achieved.

[0064] The setting tool designed in the utility model can be an electric setting tool, and can effectively overcome the defects of the existing setting tools, and has the following beneficial effects and advantages:

[0065] 1. Adopt innovative structure assembly, design clutch 7 between speed reducer 6 and ball screw 10, realize intelligent separation of upper end motor rotation and lower end piston movement, solve the problem that tool string is temporarily plugged in wellbore due to motor misrotation in pumping process, effectively reduce construction operation risk, improve operation efficiency.

[0066] Adopt ball screw cooperation multi-stage piston structure design, realize conversion of motor rotation movement to piston reciprocating movement, effectively increase release strength through multi-stage hydraulic piston supercharging structure, improve stability in setting process. And increase encoder at lower end of ball screw to realize accurate recording of multi-stage piston movement stroke, determine setting stroke of electric tool, determine setting effect.

[0067] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A setting tool, characterized in that, It includes: The driving mechanism, clutch (7), ball screw (10), sleeve (11), moving nut (12), plunger block (20), liquid storage area (22), electromagnetic valve (23), upper piston (26), connecting rod (27), lower piston (30), push rod (31), center tube (33), cylinder (36), the driving mechanism, the clutch (7), the ball screw (10), the moving nut (12), the plunger block (20), the liquid storage area (22), the electromagnetic valve (23), the upper piston (26), the connecting rod (27), the lower piston (30) and the push rod (31) are installed in the sleeve (11), the driving mechanism is connected with the clutch (7), the clutch (7) is connected with the ball screw (10), the ball screw (10) is drivingly connected with the moving nut (12), the moving nut (12) is connected with the plunger block (20), the plunger block (20) is slidingly installed in the liquid storage area (22), the liquid storage area (22) is communicated with the electromagnetic valve (23), the upper piston (26) is connected with the lower piston (30) through the connecting rod (27), the electromagnetic valve (23) is communicated with the upper piston (26) and the lower piston (30), the lower piston (30) is connected with the push rod (31), the center tube (33) is connected with the sleeve (11), the push rod (31) is slidingly installed in the center tube (33), the cylinder (36) is sleeved on the center tube (33).

2. A setting tool as claimed in claim 1, wherein The reducer (6) is installed between the driving mechanism and the clutch (7), the driving mechanism is connected with the reducer (6) through the first shaft coupling (5), and the reducer (6) is connected with the clutch (7); the reducer (6) is a planetary reducer.

3. A setting tool as claimed in claim 1, wherein, One end of the sleeve (11) is provided with a connecting head (1) for connecting with an upper end pumping cable head, a first O-shaped sealing ring (2) is installed between the connecting head (1) and the sleeve (11); the driving mechanism is a motor (4).

4. A setting tool as defined in claim 1, wherein The clutch (7) is connected with the ball screw (10) through the second shaft coupling (8), the ball screw (10) is rotatably installed in the sleeve (11) through the bearing seat (9), and the ball screw (10) is drivingly connected with the moving nut (12) through threads.

5. A setting tool as claimed in claim 1, wherein, Liquid is arranged in the liquid storage area (22), the electromagnetic valve (23) is communicated with one end of the upper piston (26) through the first liquid channel (24), and the electromagnetic valve (23) is communicated with one end of the lower piston (30) through the second liquid channel (25); a limiting seat (28) is installed in the sleeve (11), and the limiting seat (28) is located between the upper piston (26) and the lower piston (30).

6. A setting tool as claimed in claim 5, wherein, The upper piston (26) and the connecting rod (27) are each provided with a second liquid passage (25). The connecting rod (27) is provided with a liquid distribution channel (29). The liquid distribution channel (29) is connected to the end of the lower piston (30) adjacent to the upper piston (26) and the second liquid passage (25) located on the connecting rod (27). The second liquid passage (25) located on the connecting rod (27) is connected to the second liquid passage (25) located on the upper piston (26). The second liquid passage (25) on the upper piston (26) is connected to the solenoid valve (23). The solenoid valve (23) is connected to the end of the upper piston (26) away from the lower piston (30) through the first liquid passage (24).

7. A setting tool as defined in claim 1, wherein, The push rod (31) is connected to a connecting block (34), the connecting block (34) is connected to the cylinder (36), the other end of the outer sleeve (11) is equipped with a lower limit seat (32), the central tube (33) is connected to the lower limit seat (32), and the central tube (33) has an elongated hole (35) in the middle.

8. A setting tool as defined in claim 1, wherein, A second O-ring (21) is fitted on the plunger block (20), and the second O-ring (21) is located between the plunger block (20) and the outer sleeve (11).

9. A setting tool as defined in claim 1, wherein, The movable nut (12) is connected to a connecting sleeve (13) by a screw (14). The connecting sleeve (13) is connected to a protective sleeve (17), and the protective sleeve (17) is connected to the plunger block (20). An upper limit switch (15) and a lower limit switch (16) are installed on the outer sleeve (11). The screw (14) protrudes from the connecting sleeve (13), and the upper limit switch (15) and the lower limit switch (16) are located on the movement trajectory of the screw (14).

10. A setting tool as defined in claim 1, wherein, An electrical control device (3) is installed near the drive mechanism. The ball screw (10) is connected to an encoder (19) via a third coupling (18). The electrical control device (3) is connected to the drive mechanism, the clutch (7), the encoder (19), and the solenoid valve (23).

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