CN204632937U - Quick earth rod with plug-in device for temporary work - Google Patents

Abstract

A kind of rapid grounding rod carrying plug-in and pull-off device being applicable to one-shot job.Main purpose is that the earth rod solving the use of existing logging operation is not easy by the problem fixed fast and disassemble.It is characterized in that: be positioned in earth rod main body, between above the below and external thread section of Wire channel in building, equidistant intervals is fixed with some nested torus, and described nested toric bossing vertical section is trapezoidal, and some nested torus form two spur racks in left and right from top to bottom; Also comprise the stop sleeve that has support tube skirt, the top of stop sleeve is welded and fixed two pieces of vertical otic placodes, and a pair straight spur gear dish is separately fixed between two pieces of vertical otic placodes by toothed disc bearing; Earth rod main body is positioned at stop sleeve, and two, the left and right spur rack that the straight-tooth on a pair straight spur gear dish is formed with some nested torus is respectively meshed; A pair straight spur gear dish is fixed with respectively symmetrical insulation depression bar.

Description

Quick earth rod with plug-in device for temporary work

technical field

The utility model relates to a grounding rod suitable for the drawworks of the well logging instrument in the field of oil field logging when implementing the well logging operation.

Background technique

The grounding rod is a commonly used protection device in the operation of the power system. Its main function is to prevent lightning strikes and lead high-voltage electricity into the ground. Easy to pull out for long-term and stable protection. In well logging operations, the ground rod is also an indispensable device. According to CNPC's logging operation instructions and operating standard documents, the logging tool drawworks must use ground rods when performing logging operations, and shuttle buses or camping vehicles are used as supplementary vehicles for transporting logging instruments, auxiliary equipment and HSE equipment. It is a temporary rest place between wellhead work during the stay. No matter whether the power is connected or not, the grounding rod must be used to ensure the safety of personnel. The use of grounding rods in well logging operations is not only to introduce high-voltage static electricity into the ground, protect against lightning strikes, protect the drawworks of logging tools, and prevent electric leakage at the well site to ensure the safety of logging operators, but also to ensure the smooth progress of well logging operations and improve logging performance. Well data acquisition quality. For example, the GR curve is greatly disturbed by electric leakage during sound amplitude logging behind casings, so the correct use of grounding rods can ensure the quality of logging data collection. At present, the grounding rods used in the well logging industry are all ordinary grounding rods as shown in Figure 1 below, and the connection method between the grounding wire of the drawworks of the logging instrument and the grounding rod is to strip a section of copper core from the grounding wire without exception. , Wrapped around the upper third to quarter of the main body of the grounding rod, drip the melted solder on the winding part, and then wrap it with black tape and high-voltage tape to fix it. During each logging operation, the contact between the grounding wire and the grounding rod will be in contact with electrolyte water, mud and other liquids, and oxidation reactions will easily occur at the connection, which will increase the resistance between the grounding wire and the grounding rod and affect the proper protection of the grounding rod. effect.

But the logging operation is very different from the power system operation. The power system often hopes that the grounding device is in good contact with the earth, and at the same time, it is not easy to be pulled out or pulled out easily for long-term protection. Restricted by the particularity of the drilling operation, the logging operation has a strong timeliness, and the required curve must be collected in the shortest possible time, so as to buy time for the drilling operator to run the casing as soon as possible to protect the borehole and avoid borehole wall collapse. At the same time, well logging operations are often continuous operations, often from one well site to another. The current ground rod is difficult to nail in and pull out, which has a great impact on the timeliness of well logging operations. Taking Daqing Oilfield as an example, the winter is cold and long. The ground has been frozen in October, and it started to melt at the end of April. The coldest season in the wild is minus 40 degrees at night, and even the cold weather of minus 30 degrees during the day, and it is located in Inner Mongolia. The Hailaer operation area experienced extreme cold weather of minus 50 degrees. In this weather, the ground is frozen and it is difficult to nail the ground rod into the ground. According to the requirements of the work document, the ground rod nailed into the ground is required to be motionless by kicking, and electrolyte water or mud is required to be poured at the contact point between the ground rod and the ground to increase the electrical coupling with the ground and improve the conductivity. After the winter logging operation is over, the ground rod will be firmly frozen in the ground and it is difficult to pull out. Daqing logging workers often use a sledgehammer to strike hard on the sides of the ground rod exposed to the ground. Pull out with brute force. This method of pulling out is a helpless move, which is laborious and affects timeliness. There have even been incidents where the grounding rod was nailed too deep and could not be pulled out. The logging tool winch was able to leave the well site by cutting the grounding wire and abandoning the grounding rod. . In a nutshell, the existing grounding rods for well logging have the following problems: (1) single heavy hammer nailing method, if the heavy hammer is lost during well logging construction, it will not be able to enter the ground, which directly affects the inability to perform well logging operations; ( 2) Restricted by the timeliness of logging operations, it is difficult to pull out in a short time, especially in the winter operation period; (3) The grounding wire and grounding rod are the simplest winding contact connection, which is neither laborious nor easy to oxidize. Rust increases resistance and reduces conductivity.

Contents of the invention

In order to solve the technical problems mentioned in the background technology, the utility model provides a fast grounding rod suitable for well logging field operations. This kind of fast grounding rod has a simple structure and ingenious design, and applies the principle of threaded self-tapping screws and the principle of leverage , comes with a rotary ground entry device and a pull-out device, which is easy to install and disassemble, reduces the labor intensity of workers and greatly improves the timeliness of logging operations. At the same time, a new type of main body perforation structure is adopted, and the connection method with the grounding wire has changed. The new connection method is not only more resistant to tension than the previous contact winding, but also can effectively prevent the connection between the inner core of the grounding wire and the main body of the grounding rod from being oxidized and rusted. An increase in resistance decreases conductivity.

The technical solution of the utility model is: this kind of fast ground rod with its own plug-in device suitable for temporary operations includes a rod-shaped ground rod main body, and its unique feature is that the bottom end of the ground rod main body is a cone section , above the cone section is an external thread section with external threads, a threading slot is opened on the top of the main body of the grounding rod, a nickel sealing hole is opened in the middle section of the threading slot, and a nickel sealing hole is opened in the middle of the threading slot. Above, a hard insulating ring is fixed through the main body of the ground rod; on the main body of the ground rod, between the lower part of the threading groove and the upper part of the external thread section, a number of nested circles are fixed at equidistant intervals. Ring body, the longitudinal section of the convex part of the nested ring body is trapezoidal, and several nested ring bodies form two left and right straight toothed racks from top to bottom;

The fast grounding rod also includes a support sleeve with a support tube skirt, the top of the support sleeve is welded and fixed to two vertical ear plates, and a pair of spur gear discs are respectively fixed on the two vertical ear plates through the gear disc bearings. Between the plates; the main body of the grounding rod is located in the supporting sleeve, and the spur teeth on a pair of spur gear discs mesh with the left and right spur racks formed by several nested rings;

Symmetrical insulating pressing rods are respectively fixed on a pair of spur gear discs.

The utility model has the following beneficial effects: the grounding rod has a threading groove through which a nickel sealing hole is opened in the middle section of the threading groove, and the inner core stripped from the grounding wire can be passed through the threading groove to hang the miniature pin After retracting into the nickel-sealed hole, use a lead seal to fix the inner core of the wire on the side of the penetration and exit, and seal it with solder on both sides of the hole. The inner core of the wire is closely connected with the main body of the metal rod in the perforation, effectively It ensures that the contact between the grounding wire and the grounding rod is not easy to oxidize and rust in the humid environment, which not only improves the protection effect but also prolongs the service life. Greater pull.

When the grounding rod is installed, the support tube skirt can be in stable contact with the ground, which is convenient for the grounding rod to be stably smashed into the ground, and can effectively prevent hand smashing; After the work is over, the device can be quickly pulled out by pressing down the insulating pressure rod by using the lever principle. When the two insulating pressure rods are closed down, the grounding rod can be pulled out of the ground instantly, avoiding the laborious disassembly of the original grounding rod. problem.

In addition, the threaded tip cooperates with the top metal ring to rotate the grounding rod horizontally without a heavy hammer, so that the grounding rod can be easily drilled into the ground and fixed.

The sharp grounding rod cannot be fixed in the instrument room, and the random movement of the grounding rod can easily damage the logging instrument, and the sharp lower end of the grounding rod can easily pierce the air bag that protects the fixed logging tool. Conventional well logging instruments and shorts have protective caps, which can be fixed through the fixed pins in the instrument room; the insulating ring on the top of the new grounding rod can also be fixed through the insulating ring when the instrument is loaded and fixed. And it plays the role of fixing in the drawworks instrument room of the logging instrument.

To sum up, this kind of fast grounding rod has simple structure and ingenious design. Compared with all grounding rods and similar devices, it has a revolutionary self-wearing insertion and extraction device. This unique advantage makes this new type of grounding rod easy to disassemble and replace. installation, has great practical application value.

Description of drawings:

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2 is a schematic diagram of the overall structure of the ground rod main body of the present invention.

Fig. 3 is a schematic view of the utility model after the ground rod is nailed into the ground.

Fig. 4 is a structural schematic diagram of the meshing of the spur teeth on the spur gear disc of the utility model with the left and right spur racks formed by several nested rings respectively.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Fig. 1 to Fig. 4, this kind of fast grounding rod with its own plug-in device suitable for temporary operations includes a rod-shaped grounding rod main body 4, and its unique feature is that the bottom end of the grounding rod main body 4 is Cone section 1, above the cone section 1 is an externally threaded section 2, the top of the ground rod main body 4 has a threading slot 6 through it, and a nickel seal is opened in the middle section of the threading slot The hole 5 is above the threading slot, and a hard insulating ring 7 is fixed through the main body of the ground rod; it is located on the main body of the ground rod, between the bottom of the threading slot and the top of the external thread section 2 Between them, several nested ring bodies 3 are fixed at equidistant intervals, the longitudinal section of the raised part of the nested ring body is trapezoidal, and several nested ring bodies 3 form two left and right straight toothed racks from top to bottom. ;

The fast ground rod also includes a support sleeve 10 with a support tube skirt 8, the top of the support sleeve 10 is welded and fixed with two vertical ear plates 11, and a pair of spur gear discs 13 are respectively fixed by gear disc bearings 12 Between the two vertical ear plates 11; the main body of the grounding rod 4 is located in the support sleeve 10, and the straight teeth 14 on a pair of spur gear discs 13 are respectively connected with the left and right teeth formed by several nested rings 3. Spur tooth rack meshing;

A pair of spur gear discs 13 are respectively fixed with symmetrical insulating pressure rods 9 .

When in use, the skirt surface at the bottom of the main body of the support sleeve can be in stable contact with the ground, which is convenient for the ground rod to be stably smashed into the ground, and the lower end of the thread plays an auxiliary role in drilling the ground rod into the ground, reducing the installation time. At the same time, when encountering a hard surface, insert the insulating rod commonly used in logging work into the insulating ring of the working head of the grounding rod, and rotate the grounding rod horizontally to easily drill the grounding rod into the ground. While installing the device, the two insulating pressure rods are opened as the ground rod drills into the ground. After the operation is completed, the two insulating pressure rods can be pulled together to pull the ground rod out of the ground instantly, avoiding the original grounding. Difficult to disassemble the stick.

At the same time, the device solves the problem that the original grounding rod is susceptible to moisture, rust and is not durable. The wire is located in the wire protection groove, and the two ends of the protection groove are sealed to ensure that the wire is not affected by moisture and is not easy to be pulled out, which greatly prolongs the life of the wire. At the same time, the wire is not affected by the outside world and can continuously ensure its low insulation state to meet the operating requirements.

In addition, the insulating ring in the design of the device helps to fix the ground rod in the logging vehicle, avoiding the danger of the ground rod moving randomly and damaging the logging instrument, and the sharp lower end of the ground rod piercing the protective air bag of the logging instrument.

Claims (1)

1. A quick grounding rod with a plug-in device suitable for temporary operations, including a rod-shaped grounding rod body (4), characterized in that: the bottom end of the grounding rod body (4) is a conical section (1 ), on the top of the cone section (1) is an external thread section (2) with external threads, and a threading groove (6) is opened on the top of the ground rod body (4). In the middle section of the threading groove A nickel sealing hole (5) is opened, and a hard insulating ring (7) is fixed through the main body of the grounding rod above the threading slot; Between the lower part and the upper part of the external thread segment (2), several nested toruses (3) are fixed at equidistant intervals. (3) Two left and right spur racks are formed from top to bottom; The fast ground rod also includes a support sleeve (10) with a support tube skirt (8), the top of the support sleeve (10) is welded and fixed with two vertical ear plates (11), a pair of spur gear discs (13) are respectively fixed between the two vertical ear plates (11) through the gear disc bearings (12); The straight teeth (14) on the top mesh with two left and right straight tooth racks formed by several nested rings (3) respectively; Symmetrical insulating pressure rods (9) are respectively fixed on a pair of spur gear discs (13).