Pre-tightening type pipe washing device used on top drive and capable of monitoring pressure

Abstract

A pre-tightening type flushing pipe device used on a top drive and capable of monitoring pressure comprises a flushing pipe body, a flushing pipe upper portion is installed at the top end of the flushing pipe body, a flushing pipe lower portion is installed below the flushing pipe body, the flushing pipe upper portion is connected with a top drive gooseneck pipe, a top drive main shaft is installed on the flushing pipe lower portion, and the flushing pipe upper portion comprises an upper portion large nut. The top drive gooseneck pipe flushing pipe device solves the problems that an existing flushing pipe device is short in service life, high in pressure and prone to leakage, time-consuming and labor-consuming in installation and free of any symptom before leakage. The combined installation of the flushing pipe upper part and the flushing pipe lower part is connected with the top drive gooseneck pipe and the top drive main shaft, so that the overall weight is light, the installation is convenient and fast, the service life is long, the pressure alarm arranged on the three-way joint can monitor the internal slurry pressure in real time, and the pressure alarm can give an alarm before the sealing failure of the flushing pipe packing. And the working efficiency of a top drive and a drilling crew site is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling equipment, in particular to a pre-tightening pipe flushing device capable of monitoring pressure on a top drive. Background Art

[0002] Top drive drilling rigs are widely used in the oil drilling industry. They directly drive the drill bit on the top of the derrick to perform rotary drilling and complete various drilling operations such as circulating drilling fluid, connecting columns, making and breaking out, and back-marking.

[0003] The flushing pipe device is a component in the top drive drilling device. During the drilling process, high-pressure mud circulation is required. The flushing pipe can ensure that the channel between the main shaft and the stationary gooseneck does not leak mud during relative rotation. It can also buffer part of the rotation impact and plays a key role in the entire drilling process.

[0004] When the top drive is drilling, the inside of the flushing pipe device is subjected to the impact of high-pressure mud and rotational friction for a long time, which wears the flushing pipe packing and causes the problem of failure of the flushing pipe packing seal. After the seal fails, mud leaks, affecting the working environment of the drilling platform and increasing the risk of mud entering the reduction box. The overall weight of the traditional flushing pipe devices currently available on the market is heavy. Each time the flushing pipe device is replaced, a sledgehammer is required to be used to forcefully strike the upper and lower large nuts of the flushing pipe device to tighten the internal flushing pipe packing to achieve the sealing effect. This is time-consuming and labor-intensive, and will increase the labor intensity and safety risks of on-site staff. The service life of traditional flushing pipe devices is not long, and they are prone to leakage if the pressure is too high, which has a certain impact on the progress and safety of on-site work. Frequent leakage will increase the workload of on-site personnel, affect the on-site drilling progress, and increase the drilling cost of the well team.

[0005] Therefore, in view of the shortcomings of the prior art, it is necessary to provide a pre-tightening pipe flushing device capable of monitoring pressure on a top drive to solve the shortcomings of the prior art. Utility Model Content

[0006] The utility model aims to avoid the shortcomings of the prior art and provide a pre-tightening flushing pipe device for monitoring pressure on a top drive, which solves the problems of short service life of the existing flushing pipe device, easy leakage under high pressure, time-consuming and labor-intensive installation, and no signs before leakage. The flushing pipe upper part and the flushing pipe lower part are combined and installed to connect with the top drive gooseneck pipe and the top drive main shaft, so as to achieve light overall weight, convenient installation and long service life. The pressure alarm arranged on the three-way joint can monitor the internal mud pressure in real time, and the pressure alarm can alarm before the flushing pipe packing seal fails, thereby improving the working efficiency of the top drive and the well team on site.

[0007] The above-mentioned purpose of the utility model is achieved through the following technical means.

[0008] Provided is a pre-tightening pipe flushing device capable of monitoring pressure on a top drive, comprising a pipe flushing body, a pipe flushing upper part being mounted on the top of the pipe flushing body, a pipe flushing lower part being mounted below the pipe flushing body, a top drive gooseneck being connected to the pipe flushing upper part, and a top drive main shaft being mounted on the pipe flushing lower part;

[0009] The upper part of the flushing pipe includes an upper large nut, one end of which is threadedly connected to the flushing pipe body, and the other end of which is threadedly connected to the top drive gooseneck pipe. An upper clamping nut is arranged inside the upper large nut, one end of which is threadedly connected to the upper large nut, and a flushing pipe packing is arranged between the other end of the upper clamping nut and the flushing pipe body, and an upper sealing ring seat is arranged above the upper clamping nut, and sealing rings are arranged at the upper and lower ends of the upper sealing ring seat respectively;

[0010] The lower part of the flush pipe comprises a lower large nut, the lower part of the lower large nut is threadedly connected with the top drive main shaft, a lower packing box is installed above the lower large nut, and a sealing ring is arranged between the lower large nut and the top drive main shaft.

[0011] Specifically, the lower packing box and the lower large nut are both sleeved on the punching pipe body, a lower clamping nut is installed between the lower packing box and the lower large nut, three groups of lower sealing ring seats are arranged inside the lower packing box, and four groups of punching pipe packings are arranged between the lower sealing ring seats.

[0012] Specifically, a three-way joint is arranged on the lower sealing ring seat, the three-way joint is vertically installed on the lower sealing ring seat, a grease nipple is connected to the end of the three-way joint, and a pressure alarm is installed on the three-way joint.

[0013] Specifically, a retaining spring is arranged on one side of the upper sealing ring seat, and the retaining spring is in contact with the upper large nut.

[0014] Specifically, four groups of flushing pipe packings are installed in parallel in the lower sealing ring seat.

[0015] The utility model solves the problems of short service life of existing flushing pipe devices, easy leakage under high pressure, time-consuming and labor-intensive installation, and no signs before leakage during the production process. The flushing pipe upper part and the flushing pipe lower part are installed in combination to be connected with the top drive gooseneck pipe and the top drive main shaft, so as to achieve light overall weight, convenient installation and long service life. The pressure alarm arranged on the three-way joint can monitor the internal mud pressure in real time, and the pressure alarm can alarm before the flushing pipe packing seal fails, thereby improving the working efficiency of the top drive and the well team on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0017] Figure 1 The utility model is an assembly diagram of a pre-tightening pipe flushing device capable of monitoring pressure on a top drive.

[0018] Figure 2 The utility model is a structural schematic diagram of a pre-tightening pipe flushing device capable of monitoring pressure on a top drive.

[0019] from Figure 1 to Figure 2 Including:

[0020] 1. Flushing pipe body;

[0021] 2. Flush the upper part of the pipe;

[0022] 3. Flush the lower part of the pipe;

[0023] 4. Top drive gooseneck;

[0024] 5. Top drive spindle;

[0025] 6. Upper large nut;

[0026] 7. Tighten the upper nut;

[0027] 8. Pipe flushing packing;

[0028] 9. Upper sealing ring seat;

[0029] 10. Sealing ring;

[0030] 11. Lower large nut;

[0031] 12. Lower packing box;

[0032] 13. Tighten the nut;

[0033] 14. Lower sealing ring seat;

[0034] 15. Tee connector;

[0035] 16. Butter mouth;

[0036] 17. Pressure alarm;

[0037] 18. Circlip. DETAILED DESCRIPTION

[0038] The utility model is further described in conjunction with the following embodiments.

[0039] Example 1.

[0040] like Figure 1-2 As shown, a pre-tightened pipe flushing device for monitoring pressure on a top drive comprises a pipe flushing body 1, a pipe flushing upper part 2 is installed on the top of the pipe flushing body 1, a pipe flushing lower part 3 is installed below the pipe flushing body 1, the pipe flushing upper part 2 is connected to a top drive gooseneck 4, and a top drive main shaft 5 is installed on the pipe flushing lower part 3.

[0041] The flushing pipe body 1 is sealed and connected with the top drive gooseneck 4 and the top drive main shaft 5 by the flushing pipe upper part 2 and the flushing pipe lower part 3 respectively installed at the top and the bottom of the flushing pipe body 1, so that the installation is time-saving and labor-saving while ensuring the sealing after installation.

[0042] The surface of the flushing pipe body 1 is plated, and the surface roughness reaches the mirror grade. When used together with the flushing pipe packing 8, the sealing and wear resistance are higher than those of the traditional flushing pipe packing.

[0043] The upper part 2 of the punch pipe includes an upper large nut 6, one end of which is threadedly connected to the punch pipe body 1, and the other end of the upper large nut 6 is threadedly connected to the top drive gooseneck pipe 4. An upper clamping nut 7 is arranged inside the upper large nut 6, one end of the upper clamping nut 7 is threadedly connected to the upper large nut 6, and a punch pipe packing 8 is arranged between the other end of the upper clamping nut 7 and the punch pipe body 1, an upper sealing ring seat 9 is arranged above the upper clamping nut 7, and sealing rings 10 are respectively arranged at the upper and lower ends of the upper sealing ring seat 9.

[0044] The interior of the upper large nut 6 is designed with a trapezoidal thread connected to the top drive gooseneck 4 and a fine thread connected to the upper clamping nut 7. The flushing pipe packing 8 is installed inside the upper clamping nut 7. The upper clamping nut 7 is threadedly connected to the upper large nut 6 (left-handed thread). The upper clamping nut 7 is tightened using an installation tool, so that the flushing pipe packing 8 inside the upper clamping nut 7 is squeezed and deformed, and fits tightly against the outer wall of the flushing pipe, thereby achieving the effect of sealing the mud.

[0045] A retaining spring 18 is provided on one side of the upper sealing ring seat 9, and the retaining spring 18 contacts the upper large nut 6. The retaining spring 18 is installed in the retaining spring 18 groove on the upper part of the punch tube body 1, which can limit the position of the upper sealing ring seat 9 and prevent it from separating from the punch tube body 1.

[0046] The sealing ring 10 is respectively installed inside the upper end surface of the upper clamping nut 7 and the upper sealing ring seat 9. When the upper large nut 6 is connected to the lower end of the top drive gooseneck pipe 4 through a trapezoidal thread and tightened, it will move upward, thereby achieving the purpose of sealing the mud by squeezing the sealing ring 10 on the end surface.

[0047] The lower part 3 of the flush pipe includes a lower large nut 11 , which is threadedly connected to the top drive main shaft 5 at the bottom, a lower packing box 12 is installed above the lower large nut 11 , and a sealing ring 10 is arranged between the lower large nut 11 and the top drive main shaft 5 .

[0048] The lower packing box 12 and the lower large nut 11 are both sleeved on the punching pipe body 1, and a lower clamping nut 13 is installed between the lower packing box 12 and the lower large nut 11. Three groups of lower sealing ring seats 14 are arranged inside the lower packing box 12, and four groups of punching pipe packings 8 are arranged between the lower sealing ring seats 14.

[0049] The lower large nut 11 is internally designed with a trapezoidal thread connected to the top drive main shaft 5, and the lower packing box 12 is internally designed with a fine pitch thread connected to the lower clamping nut 13. The four flushing pipe packings 8 are respectively installed in the three lower sealing ring seats 14 and a lower clamping nut 13, and the three sealing rings 10 seats with the flushing pipe packings 8 are sequentially installed in the lower packing box 12, and the lower clamping nut 13 is connected to the thread in the lower packing box 12 (left-handed thread), and the lower clamping nut 13 is tightened using an installation tool. The lower clamping nut 13 moves into the lower packing box 12 during the tightening process, thereby squeezing the four flushing pipe packings 8 in the lower sealing ring seat 14 and the lower clamping nut 13 to make them squeezed and deformed, and close to the outer wall of the flushing pipe, thereby achieving a sealing effect.

[0050] The sealing ring 10 is installed in the sealing groove on the end face of the lower clamping nut 13. When the lower large nut 11 is connected to the upper end of the main shaft through a trapezoidal thread and tightened, the lower large nut 11 presses the lower packing box 12 and the multiple groups of lower sealing ring seats 14 and flushing pipe packing 8 inside it to move downward, squeezing the sealing ring 10 on the end face of the lower clamping nut 13 to achieve the purpose of sealing the mud.

[0051] During the rotary drilling process of the top drive main shaft 5, all parts in the lower part 3 of the flush pipe rotate together with the main shaft, among which the four groups of flush pipe packings 8 are close to the outer wall of the flush pipe body 1 and seal the high-pressure mud while rotating with the main shaft.

[0052] A three-way joint 15 is provided on the lower sealing ring seat 14 . The three-way joint 15 is vertically installed on the lower sealing ring seat 14 . A grease nipple 16 is connected to the end of the three-way joint 15 . A pressure alarm 17 is installed on the three-way joint 15 .

[0053] The first lower sealing ring seat 14 from the top in the lower packing box 12 is designed with a threaded hole for connecting a three-way joint 15. The other two ends of the three-way joint 15 are respectively connected to a grease nipple 16 and a pressure alarm 17. The grease nipple 16 is mainly used for maintenance, and the pressure alarm 17 is mainly used to monitor the internal pressure and alarm reminders.

[0054] During the rotary drilling process of the top drive main shaft 5, the flushing pipe packing 8 in the flushing pipe lower part 3 will continue to wear and gradually fail, and the order of failure is from bottom to top. After the third flushing pipe packing 8 from the bottom fails, high-pressure mud will enter the inside of the three-way joint 15. If the pressure reaches the set value of the pressure alarm 17, the pressure alarm 17 will alarm, indicating that the seals of the first three flushing pipe packings 8 of the flushing pipe lower part 3 have failed, and only the last flushing pipe packing 8 plays a sealing role. It is necessary to prepare in advance to replace the flushing pipe packing 8 to improve the work efficiency of the top drive and the well team on site.

[0055] In the production process, the problems of low service life of the existing flushing device, easy leakage under high pressure, time-consuming and labor-intensive installation, and no signs before leakage are solved. The flushing pipe upper part 2 and the flushing pipe lower part 3 are installed in combination and connected with the top drive gooseneck pipe 4 and the top drive main shaft 5, so as to achieve light overall weight, convenient installation and long service life. The pressure alarm 17 arranged on the three-way joint 15 can monitor the internal mud pressure in real time. The pressure alarm 17 can alarm before the flushing pipe packing 8 seal fails, thereby improving the work efficiency of the top drive and the well team on site.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the protection scope of the utility model. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A pre-tightening pipe flushing device capable of monitoring pressure on a top drive, characterized in that: It comprises a flush pipe body, wherein an upper part of the flush pipe is installed on the top of the flush pipe body, a lower part of the flush pipe is installed below the flush pipe body, the upper part of the flush pipe is connected with a top drive gooseneck pipe, and the lower part of the flush pipe is installed with a top drive main shaft; The upper part of the flushing pipe comprises an upper large nut, one end of which is threadedly connected to the flushing pipe body, the other end of which is threadedly connected to the top drive gooseneck pipe, an upper clamping nut is arranged inside the upper large nut, one end of which is threadedly connected to the upper large nut, a flushing pipe packing is arranged between the other end of the upper clamping nut and the flushing pipe body, an upper sealing ring seat is arranged above the upper clamping nut, and sealing rings are arranged at the upper and lower ends of the upper sealing ring seat respectively; The lower part of the flush pipe comprises a lower large nut, the lower part of the lower large nut is threadedly connected to the top drive main shaft, a lower packing box is installed above the lower large nut, and the sealing ring is arranged between the lower large nut and the top drive main shaft.

2. A pre-tightening pipe flushing device capable of monitoring pressure on a top drive according to claim 1, characterized in that: The lower packing box and the lower large nut are both sleeved on the flushing pipe body, a lower clamping nut is installed between the lower packing box and the lower large nut, three groups of lower sealing ring seats are arranged inside the lower packing box, and four groups of flushing pipe packings are arranged between the lower sealing ring seats.

3. A pre-tightening pipe flushing device capable of monitoring pressure on a top drive according to claim 2, characterized in that: A three-way joint is arranged on the lower sealing ring seat, the three-way joint is vertically installed on the lower sealing ring seat, a grease nipple is connected to the end of the three-way joint, and a pressure alarm is installed on the three-way joint.

4. A pre-tightening pipe flushing device capable of monitoring pressure on a top drive according to claim 3, characterized in that: A retaining spring is arranged on one side of the upper sealing ring seat, and the retaining spring is in contact with the upper large nut.

5. A pre-tightening pipe flushing device capable of monitoring pressure on a top drive according to claim 4, characterized in that: Four groups of flushing pipe packings are installed in parallel in the lower sealing ring seat.

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