Well drilling top drive conductive threading and internal blowout prevention function integrated nipple

Abstract

The utility model provides a well drilling top drive conductive wire passing and internal blowout prevention function integrated pup joint which comprises an internal blowout preventer, a rotor of a conductive slip ring is fixedly connected to the middle of the internal blowout preventer through a key, a stator of the conductive slip ring is connected with the rotor of the conductive slip ring in a matched mode, and a rotor output end is installed at the outer end of the rotor of the conductive slip ring. A stator input end and a stator fixing block are installed at the outer end of a stator of the conductive slip ring, the stator input end is connected with a stator output cable, and a rotor output end is connected with a cable in a small hole in the protection connector through a rotor output cable. The device is convenient to use, the cable can pass through a drilling top drive, and the device has an internal blowout prevention function.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil equipment, and particularly relates to a sub-section integrating the functions of conducting electricity and passing wires and internal blowout prevention for a drilling top drive. Background Technique

[0002] The top drive drilling device (referred to as the top drive for short) is the most important current drilling power device. It is installed at the top of the derrick and provides rotational power and torque for the drill string, thereby realizing rotary drilling operations.

[0003] With the future development of drilling towards the intelligent direction, it is necessary to solve the technology of supplying power from the surface wellhead to the underground and have normal safety protection measures. Due to the rotation of multiple different parts of the top drive, it is necessary to have the functions of conducting electricity and data transmission while rotating, and it is necessary to seal the central through hole of the drill string to prevent internal blowout of the drill string. Therefore, a sub-section integrating the functions of conducting electricity and passing wires and internal blowout prevention for a drilling top drive is required.

[0004] The application number is CN202210873706.3, which discloses a cable pipe sealing device and an operation method, including a body; also including a sealing and protecting mechanism and a fixing mechanism; a groove for laying cables is opened on the outer wall of the body; the sealing and protecting mechanism surrounds the outside of the cable in the groove, and the outermost wall surface of the sealing and protecting mechanism is on the same cylindrical surface as the outer wall surface of the body except for the groove; the fixing mechanism fixes the sealing and protecting mechanism on the body. The sealing and protecting mechanism includes a sealing shell, the sealing shell is placed in the groove, and the cable passes through the sealing shell body. During the process of pulling out and lowering the cable pipe string of the electric submersible pump during downhole workover operations, the well control safety of the operation is improved, the electric submersible pump cable is effectively protected, and the phenomenon of being unable to shut in the well when temporarily stopping work or pulling out and lowering the electric submersible pump pipe string at night is avoided. The shut-in of the cable pipe string during the construction of the electric submersible pump well is realized, the well control safety is improved, the electric submersible pump cable is effectively protected, and the blank of being unable to shut in the well of the electric submersible pump pipe string is filled.

[0005] Since the cable pipe sealing device is arranged in components that do not rotate relative to each other, reliable operation can be ensured, but it cannot be applied to the top drive drilling device.

[0006] The application number is CN201610544670.9, and the utility model name is a top drive drilling device, which belongs to the technical field of drilling devices. It includes a blowout preventer assembly, and the lower end of the blowout preventer assembly is connected to a drill pipe. Its characteristics are as follows: It also includes a power assembly and a water inlet device. The power assembly includes an AC variable frequency motor, and there is a housing outside the AC variable frequency motor. There is a hollow main shaft inside the AC variable frequency motor. The hollow main shaft is connected to the rotor of the AC variable frequency motor and serves as a power output shaft. Sealing structures are provided between the upper and lower ends of the hollow main shaft and the housing. The water inlet device is hermetically and movably connected to the upper part of the hollow main shaft. The upper end of the blowout preventer assembly is connected to the lower end of the hollow main shaft. The utility model directly drives the hollow main shaft by a top motor, greatly reducing the overall weight and volume of the device, having high drilling efficiency and saving drilling time.

[0007] For this top drive drilling device, using an AC variable frequency motor to directly drive the hollow main shaft to rotate eliminates the speed reduction device, reducing the overall volume and weight of the equipment. However, the problem of rotation of multiple parts is not considered. Content of the utility model

[0008] The purpose of the utility model is to solve the defects existing in the above-mentioned prior art, and provide a short joint integrating the functions of conducting electricity and passing a wire and internal blowout prevention for a drilling top drive, which realizes the passing of a cable at the drilling top drive and has the function of internal blowout prevention.

[0009] The utility model adopts the following technical solutions:

[0010] A short joint integrating the functions of conducting electricity and passing a wire and internal blowout prevention for a drilling top drive includes an internal blowout preventer. Among them, the rotor of a slip ring is fixedly connected to the middle of the internal blowout preventer through a key. The stator of the slip ring is connected to the rotor of the slip ring in a matching manner to realize current transmission inside. An output end of the rotor is installed at the outer end of the rotor of the slip ring. An input end of the stator and a stator fixing block are installed at the outer end of the stator of the slip ring. The input end of the stator is connected to an output cable. The lower end of the internal blowout preventer is connected to a protection joint. The output end of the rotor is connected to the cable in the small hole inside the protection joint through a rotor output cable. The cable in the small hole inside the protection joint is connected to the cable on the intelligent drill pipe string at the lower end. The internal blowout preventer is a hollow cylinder, and the connection part with the protection joint is a hollow cone shape. The protection joint is a hollow stepped cylinder, and the connection part with the blowout preventer is a hollow cone groove matching the hollow cone. When the internal blowout preventer is connected to the protection joint, the outer diameter at the connection part of the protection joint is the same as the outer diameter of the internal blowout preventer.

[0011] Furthermore, an automatic control blowout prevention valve and a manual blowout prevention valve are installed at the upper end of the internal blowout preventer.

[0012] Furthermore, the automatic control blowout prevention valve is located above the manual blowout prevention valve.

[0013] Furthermore, the stator fixing block is fixedly connected to the derrick.

[0014] Furthermore, the upper end of the internal blowout preventer is connected to the top drive main shaft, and the lower end of the protection joint is connected to the drill string composed of intelligent drill pipes.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. The structure of the present utility model is simple, easy to use, and has a short height. It can transmit the cable from the wellhead to the downhole intelligent drill pipe. It can be used at the drilling site that requires intelligent and information-based drilling. While ensuring the safety of personnel and equipment, it has more functions, realizes the cable passing through at the drilling top drive, and has the function of internal blowout prevention.

[0017] 2. By using a conductive slip ring at the wellhead position to bypass the input cable current at the upper end or outside the internal blowout preventer and transmit it to the inside of the intelligent drill pipe, the safe and efficient passing of the cable at the wellhead position is realized.

[0018] 3. By integrating the conductive slip ring with the internal blowout preventer and fixedly installing the stator of the conductive slip ring on the internal blowout preventer, the internal blowout preventer can be integral or split, enabling it to have both the conductive function and the function of preventing internal blowout of the drill string. Description of the Drawings

[0019] Figure 1 is a semi-sectional structure schematic diagram of the present utility model;

[0020] Figure 2 is a full-sectional structure schematic diagram of the present utility model.

[0021] In the figure: 1 - internal blowout preventer, 2 - automatic control blowout preventer valve, 3 - manual blowout preventer valve, 4 - rotor of the conductive slip ring, 5 - stator of the conductive slip ring, 6 - rotor output end, 7 - rotor output cable, 8 - protection joint, 9 - stator input end, 10 - stator input cable, 11 - stator fixing block. Detailed Embodiments

[0022] To make the objectives, technical solutions, and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present utility model fall within the protection scope of the present utility model.

[0023] As Figure 1As shown in the figure, a short joint integrating the functions of electrical conduction and internal blowout prevention for a drilling top drive of the present utility model includes an internal blowout preventer 1, an automatic control blowout preventer valve 2, a manual blowout preventer valve 3, a rotor 4, a stator 5, a rotor output end 6, a rotor output cable 7, a protection joint 8, a stator input end 9, a stator input cable 10, and a stator fixing block 11.

[0024] Among them, the upper end of the internal blowout preventer 1 is connected to the top drive main shaft, and the automatic control blowout preventer valve 2 and the manual blowout preventer valve 3 are installed at the upper end of the internal blowout preventer 1. The automatic control blowout preventer valve 2 is located above the manual blowout preventer valve 3. The rotor 4 of the conductive slip ring is fixedly connected to the middle of the internal blowout preventer 1 by a key. The stator 5 of the conductive slip ring is connected to the rotor 4 of the conductive slip ring to achieve current transmission inside. An outer end of the rotor 4 of the conductive slip ring is provided with a rotor output end 6, and an outer end of the stator 5 of the conductive slip ring is provided with a stator input end 9 and a stator fixing block 11. The stator input end 9 is connected to the stator output cable 10. Since the rotor 4 of the conductive slip ring is installed on the outer diameter of the internal blowout preventer 1 and the stator 5 of the conductive slip ring is installed at the outer end of the rotor 4 of the conductive slip ring, the stator input cable 10 connected to the stator 5 of the conductive slip ring and the rotor output cable 7 connected to the rotor 4 of the conductive slip ring are both outside the internal blowout preventer 1, do not enter the inside of the internal blowout preventer 1, and will not contact the internal blowout preventer 1. The stator fixing block 11 is fixedly connected to the derrick, so as to ensure that the stator 5 of the conductive slip ring does not rotate. The lower end of the internal blowout preventer 1 is connected to the protection joint 8, and the lower end of the protection joint 8 is connected to the drill string composed of intelligent drill pipes. The rotor output end 6 is connected to the cable in the small hole inside the protection joint 8 through the rotor output cable 7. The cable in the small hole inside the protection joint 8 is further connected to the cable on the intelligent drill pipe drill string at the lower end. The internal blowout preventer 1 is in the shape of a hollow cylinder, and the connection part with the protection joint 8 is a hollow cone shape. The protection joint 8 is a hollow stepped cylinder, and the connection part with the blowout preventer 1 is a hollow cone groove matching the hollow cone. When the internal blowout preventer 1 is connected to the protection joint 8, the outer diameter of the connection part of the protection joint 8 is the same as the outer diameter of the internal blowout preventer 1. Since the rotor output cable 7 is installed on the rotor 6 of the conductive slip ring, and the outer diameter of the rotor 6 of the conductive slip ring is larger than that of the internal blowout preventer 1 and the protection joint 8, the rotor output cable 7 will not contact the internal blowout preventer 1.

[0025] The working mode of the present utility model is as follows:

[0026] As Figure 2As shown in the figure, the current transmission path is as follows: when the current at the upper end passes through the stator input cable 10 and is transmitted from the stator input end 9 to the stator 5 of the slip ring, then the current is transmitted inside the slip ring to the rotor 4, and then transmitted out from the rotor output end 6 to the rotor output cable 7, and is input into the small hole inside the protection joint 8 through the rotor output cable 7. The cable in the small hole inside the protection joint 8 is then connected to the cable on the intelligent drill pipe string at the lower end, so as to realize the transmission of current from the outside to the wellbore. By adopting this design method, the cable current is prevented from entering the inside of the blowout preventer 1, effectively ensuring the safety and reliability of the blowout preventer.

[0027] When the drilling tool is working normally, only the stator 5 of the slip ring in the whole sub is fixed, and other parts will rotate around the center. The drilling fluid is input from top to bottom through the central channel; when a blowout accident occurs inside the drill string of the downhole drilling tool, when the drilling fluid sprays from the bottom up through the central through hole, the automatic control blowout preventer valve 2 and the manual blowout preventer valve 3 of the blowout preventer 1 can be immediately closed, so as to prevent the blowout accident, and it will not affect the normal transmission of the cable current, nor will it affect the continuous rotation of the drill string.

[0028] The upper end of this sub is connected to the main shaft of the drilling top drive, and the lower end is connected to the intelligent drill pipe. By means of this sub, the cable is bypassed from the blowout preventer 1, preventing the cable from entering the inside of the blowout preventer 1, and the current at the upper end and from the outside is input into the intelligent drill pipe at the lower end, thus realizing the safe and efficient cable passing at the wellhead position. Moreover, integrating the slip ring with the blowout preventer can effectively shorten the height of the drilling top drive. Compared with the conventional drilling top drive equipment, it has a simple structure, not only has the conductive function, but also has the internal blowout prevention function of the drill string.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sub for integrating the functions of electrical conduction through-wire and internal blowout prevention in a drilling top drive, characterized in that, It includes an internal blowout preventer. Among them, the rotor of the conductive slip ring is fixedly connected to the middle of the internal blowout preventer by a key. The stator of the conductive slip ring is connected to the rotor of the conductive slip ring in a matching manner. The outer end of the rotor of the conductive slip ring is equipped with a rotor output end. The outer end of the stator of the conductive slip ring is equipped with a stator input end and a stator fixing block. The stator input end is connected to the stator output cable. The lower end of the internal blowout preventer is connected to the protection joint. The rotor output end is connected to the cable in the internal hole of the protection joint through a rotor output cable. The cable in the internal hole of the protection joint is connected to the cable on the intelligent drill pipe drill string at the lower end. The internal blowout preventer is a hollow cylinder, and the connection part with the protection joint is a hollow cone shape. The protection joint is a hollow stepped cylinder, and the connection part with the blowout preventer is a hollow cone groove matching the hollow cone. When the internal blowout preventer is connected to the protection joint, the outer diameter of the connection part of the protection joint is the same as the outer diameter of the internal blowout preventer.

2. The sub - joint integrating the conductive wire - passing and internal blowout - prevention functions of the drilling top drive according to claim 1, characterized in that, An automatic control blowout preventer valve and a manual blowout preventer valve are installed at the upper end of the internal blowout preventer.

3. The sub - joint integrating the conductive wire - passing and internal blowout prevention functions of the drilling top drive according to claim 2, wherein The automatic control blowout preventer valve is located above the manual blowout preventer valve.

4. The sub - joint integrating the functions of electrical conduction and internal blowout prevention for the top drive in drilling, as claimed in claim 1, is characterized in that The stator fixing block is fixedly connected to the derrick.

5. The sub - joint integrating the conductive wire - passing and internal blowout - preventer functions of the drilling top drive according to claim 1, characterized in that, The upper end of the internal blowout preventer is connected to the top drive main shaft, and the lower end of the protection joint is connected to the drill string composed of intelligent drill pipes.

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