Device for salvaging throttler

Abstract

The utility model provides a device for salvaging a throttler, which comprises a salvaging pipe string, the salvaging pipe string comprises a motor, a speed reducer, an anchoring tool and a salvaging tool, the speed reducer is connected with the output end of the motor, the anchoring tool and the salvaging tool are respectively connected with the output end of the speed reducer, and the anchoring tool is used for anchoring the salvaging pipe string in an inner cylinder. The fishing tool is used for fishing the throttler. The problem that an existing throttler is severely clamped and cannot be fished directly through a steel wire operation mechanism can be solved, the risk of steel wire breakage is reduced, and the whole device is simple in structure, low in cost, convenient and fast to construct and capable of effectively guaranteeing scientific drainage and mining of a gas well.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas extraction, and in particular relates to a device for fishing a choke. Background Art

[0002] During the natural gas well production process, in order to prevent the formation of hydrates in the well and cause blockage in the oil pipeline, a choke is usually inserted into the oil pipeline in the well to achieve throttling and pressure reduction to change the conditions for hydrate formation. At the same time, it can also significantly reduce the operating pressure of the ground pipeline, stabilize production and control formation agitation.

[0003] After the existing choke is lowered into the well and the operation is completed, a wireline operating mechanism is usually used to pull the choke by pulling the wire, or a continuous oil pipe with a higher tensile load is used for salvage. During the salvage process using the wireline, if the traction force of the wireline operating mechanism is insufficient, it is usually necessary to jar the wireline to increase the traction force. Due to the complexity of the underground formation, the choke may be affected by sand jamming, corrosion, etc., which directly causes the salvage force required for the choke to exceed the salvage limit of the wireline operating mechanism. Therefore, it is necessary to frequently jar the wireline to increase the traction force, causing the wireline to break easily, thereby affecting the gas well production adjustment and other subsequent drainage and gas production operations. If the choke cannot be salvaged using a wireline, a continuous oil pipe or a pressurized oil pipe with a higher tensile load is usually used to pull out the oil pipe string. This method has high construction costs and high risks. Utility Model Content

[0004] One purpose of the utility model is to propose a device for salvaging a choke, so as to solve the problem that the existing choke is seriously stuck and cannot be directly salvaged using a wireline operation mechanism, thereby reducing the risk of wire breakage. The entire device has a simple structure, low cost, and convenient construction, and can effectively ensure scientific drainage and production of gas wells.

[0005] According to the present utility model, a device for salvaging a choke is provided, comprising a salvage pipe string, wherein the salvage pipe string comprises a motor, a reducer connected to the output end of the motor, an anchoring tool connected to the output end of the reducer, and a salvage tool, wherein the anchoring tool is used to anchor the salvage pipe string in an inner tube, and the salvage tool is used to salvage the choke.

[0006] In a preferred embodiment, the salvage pipe string further includes a battery and a circuit system connected to the motor, the battery is used to supply power to the motor, and the circuit system is used to control the starting time of the motor.

[0007] In a preferred embodiment, the salvage pipe string further includes a universal joint disposed above and connected to the battery and circuit system.

[0008] In a preferred embodiment, the salvage pipe string further includes a wire jar disposed above the universal joint and connected thereto.

[0009] In a preferred embodiment, the salvage pipe string further includes a weighting rod disposed above and connected to the wire jar.

[0010] In a preferred embodiment, the salvage pipe string further includes a wire rope cap disposed above and connected to the weighting rod, wherein the wire rope cap is connected to one end of the steel wire.

[0011] In a preferred embodiment, it also includes a ground pulley, a top pulley, a wire operating mechanism and a blowout prevention sealing assembly. The wire operating mechanism is connected to the other end of the wire. The ground pulley and the top pulley are both in contact with the wire for transmitting the wire. The wire passes through the ground pulley, the top pulley and the blowout prevention sealing assembly in sequence.

[0012] In a preferred embodiment, the blowout preventer sealing assembly includes a wire pressing cap, a packing sealing box, a blowout preventer and a blowout preventer box connected in sequence from top to bottom.

[0013] In a preferred embodiment, a wellhead mechanism is further included, wherein the wellhead mechanism is arranged between the blowout preventer seal assembly and the salvage pipe string, and the steel wire passes through the blowout preventer seal assembly and the wellhead mechanism in sequence and is connected to the salvage pipe string.

[0014] In a preferred embodiment, the sky pulley is arranged above the ground pulley, and the ground pulley is connected to the wellhead mechanism.

[0015] The utility model has at least the following technical effects:

[0016] According to the utility model, a motor, a reducer connected to the output end of the motor, an anchoring tool connected to the output end of the reducer, and a salvage tool are provided, wherein the anchoring tool is used to anchor the salvage pipe string in the inner tube, and the salvage tool is used to salvage the throttle, so that a high load force can be provided to the salvage tool through the motor and the reducer, solving the problem that the existing throttle encounters severe jamming and cannot be directly salvaged using a wireline operation mechanism. During the salvage process, sufficient traction can be provided by the motor and the reducer, so there is no need to shock the wire, further reducing the risk of wire breakage. The entire device has a simple structure, low cost, and convenient construction, which can effectively ensure the scientific drainage of gas wells. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure schematically shows the overall structure of a device for fishing a choke according to an embodiment of the present invention;

[0018] Figure 2The structure diagram of a salvaging pipe string of a device for salvaging a choke according to an embodiment of the present utility model is schematically shown.

[0019] In this application, all drawings are schematic drawings, which are only used to illustrate the principles of the present invention and are not drawn according to the actual scale. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0021] In this utility model, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", etc. indicate orientations or positional relationships 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, rather than indicating or implying 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.

[0023] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features.

[0024] like Figures 1 to 2As shown, the device 100 for salvaging a throttle according to the present invention includes a salvage pipe string 9 connected to a steel wire 7. The salvage pipe string 9 includes a motor 906, a reducer 907 connected to the output end of the motor 906, an anchoring tool 908 connected to the output ends of the reducer 907, and a salvage tool 909. The anchoring tool 908 is used to anchor the salvage pipe string 9 in the inner tube. The salvage tool 909 is used to salvage the throttle 12. Specifically, the front end of the salvage tool 909 is formed into an elastic claw, and the outer periphery of the throttle 12 has a salvage neck 1201. The elastic claw can be engaged with the salvage neck 1201, so that the salvage pipe string 9 grasps the throttle 12 by its own weight, thereby connecting the salvage pipe string 9 and the throttle 12 into a whole, thereby facilitating salvage.

[0025] When the salvage pipe string 9 is lowered above the choke 12 and the elastic claws of the salvage tool 909 grasp the salvage neck 1201 of the choke 12, the motor 906 can be started. The motor 906 transmits power to the reducer 907. The reducer 907 reduces the rotation speed and increases the output power through the internal gear ratio. At the same time, the power is transmitted to the anchoring tool 908 and the salvage tool 909 respectively. The anchoring tool 908 receives the power transmitted by the reducer 907, pushing the internal anchor claws to extend radially and gradually lock into the wellbore 10, thereby ensuring that the entire salvage pipe string 9 is fixed in the wellbore 10 and preventing it from moving up and down in the wellbore 10. The salvage tool 909 also receives the power transmitted by the reducer 907 and moves upward in the axial direction, pulling the choke 12 to remove the obstruction of the choke 12.

[0026] According to the present invention, a motor 906, a reducer 907 connected to the output end of the motor 906, an anchoring tool 908 connected to the output end of the reducer 907, and a salvage tool 909 are provided, wherein the anchoring tool 908 is used to anchor the salvage pipe string 9 in the inner tube, and the salvage tool 909 is used to salvage the throttle 12, so that a high load force can be provided to the salvage tool 909 by the motor 906 and the reducer 907, thereby solving the problem that the existing throttle is seriously stuck and cannot be directly salvaged using a wire operation mechanism. During the salvage process, sufficient traction can be provided by the motor 906 and the reducer 907, so that there is no need to vibrate the wire, further reducing the risk of wire breakage. The entire device has a simple structure, low cost, and convenient construction, which can effectively ensure the scientific drainage of gas wells.

[0027] In one or more embodiments, the salvage pipe string 9 further includes a battery and a circuit system 905 connected to the motor 906, wherein the battery is used to power the motor 906, and the circuit system is used to control the starting time of the motor 906. It should be noted that the battery and the circuit system 905 are structures well known to those skilled in the art, and their structure will not be described in detail here.

[0028] In one or more embodiments, the salvage string 9 further includes a universal joint 904 disposed above and connected to the battery and circuit system 905. The universal joint 904 can be used to fine-tune the angle of the salvage string 9 to prevent the entire salvage string 9 from getting stuck when moving up and down in the wellbore.

[0029] In one or more embodiments, the salvage pipe string 9 further includes a wire jar 903 disposed above and connected to the universal joint 904. If the power provided by the motor 906 and the reducer 907 connected to the output end of the motor 906 is unable to salvage the choke, the wire jar 903 can be used to shear the pins to perform a remedial measure to prevent the entire pipe string from being unable to be retrieved.

[0030] In one or more embodiments, the salvage pipe string 9 further includes a weighting rod 902 disposed above and connected to the wire jar 903 , for weighting the wire to prevent it from swaying.

[0031] In one or more embodiments, the salvage pipe string 9 further includes a wire rope cap 901 disposed above and connected to the weight rod 902 , and the wire rope cap 901 is connected to one end of the steel wire.

[0032] In one or more embodiments, the device 100 for salvaging a throttle described in the present invention also includes a ground pulley 8, a top pulley 1, a wire operating mechanism 11 and a blowout prevention sealing assembly. The wire operating mechanism 11 is connected to the other end of the wire. The ground pulley 8 and the top pulley 1 are both in contact with the wire for transmitting the wire 7. The wire 7 passes through the ground pulley 8, the top pulley 1, and the blowout prevention sealing assembly in sequence to be connected to the wire rope cap 901. The wire operating mechanism 11 is used to pull the wire. It should be noted that the wire operating mechanism 11 is a structure well known to those skilled in the art, and its structure will not be described in detail here.

[0033] In one or more embodiments, the blowout preventer sealing assembly includes a wire pressing cap 2, a packing sealing box 3, a blowout preventer 4 and a blowout preventer box 5 connected in sequence from top to bottom, wherein the wire pressing cap 2 is used to press the steel wire to prevent the steel wire from loosening and shaking, the packing sealing box 3 is used to seal the steel wire, and the blowout preventer 4 and the blowout preventer box 5 are used to prevent the steel wire from popping out.

[0034] In one or more embodiments, the device 100 for salvaging a throttle described in the present invention further includes a wellhead mechanism 6, which is disposed between the blowout preventer seal assembly and the salvage pipe string 9. The steel wire passes through the blowout preventer seal assembly, the wellhead mechanism 6, and is connected to the salvage pipe string 9 in sequence. The wellhead mechanism 6 is used to prevent pressure leakage in the well and plays a well control role. It should be noted that the wellhead mechanism 6 is a structure well known to those skilled in the art, and its structure will not be described in detail herein.

[0035] In one or more embodiments, the top pulley 1 is disposed above the ground pulley 8 , and the ground pulley 8 is connected to the wellhead mechanism 6 .

[0036] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A device for salvaging a choke, characterized in that: The salvage pipe string includes a motor, a reducer connected to the output end of the motor, an anchoring tool connected to the output end of the reducer, and a salvage tool. The anchoring tool is used to anchor the salvage pipe string in the inner tube, and the salvage tool is used to salvage the choke.

2. The device for fishing a choke according to claim 1, characterized in that: The salvage pipe string further includes a battery and a circuit system connected to the motor, the battery is used to supply power to the motor, and the circuit system is used to control the starting time of the motor.

3. The device for fishing a choke according to claim 2, characterized in that: The salvage pipe string further includes a universal short section arranged above the battery and circuit system and connected thereto.

4. The device for fishing a choke according to claim 3, characterized in that: The salvage pipe string further includes a steel wire jar which is arranged above the universal nipple and connected thereto.

5. The device for fishing a choke according to claim 4, characterized in that: The salvage pipe string further includes a weighting rod disposed above the steel wire jar and connected thereto.

6. The device for fishing a choke according to claim 5, characterized in that: The salvage pipe string further comprises a wire rope cap which is arranged above the weighting rod and connected thereto, and the wire rope cap is connected to one end of the steel wire.

7. The device for fishing a choke according to claim 6, characterized in that: It also includes a ground pulley, a top pulley, a wire operating mechanism and a blowout-proof sealing assembly. The wire operating mechanism is connected to the other end of the wire. Both the ground pulley and the top pulley are in contact with the wire for transmitting the wire. The wire passes through the ground pulley, the top pulley and the blowout-proof sealing assembly in sequence.

8. The device for fishing a choke according to claim 7, characterized in that: The blowout prevention sealing assembly comprises a wire pressing cap, a packing sealing box, a blowout prevention pipe and a blowout prevention box which are sequentially connected from top to bottom.

9. The device for fishing a choke according to claim 8, characterized in that: It also includes a wellhead mechanism, which is arranged between the blowout preventer seal assembly and the salvage pipe string. The steel wire passes through the blowout preventer seal assembly and the wellhead mechanism in sequence and is connected to the salvage pipe string.

10. The device for fishing a choke according to claim 9, characterized in that: The sky pulley is arranged above the ground pulley, and the ground pulley is connected to the wellhead mechanism.

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