Auxiliary tool for indicator diagram test of oil pumping unit of coal-bed gas well

Abstract

The utility model belongs to the technical field of coal-bed gas well pumping unit indicator diagram testing, and provides an auxiliary tool for coal-bed gas well pumping unit indicator diagram testing, which comprises a gas production tree, a polish rod is arranged in the gas production tree, and the polish rod reciprocates up and down in the gas production tree. A third square clip is mounted at the top, close to the gas production tree, of the polished rod through a bolt; the auxiliary device comprises a main body, the section of the main body is of a U-shaped structure, a lock hole is formed in the inner side of the main body, a cylinder is fixedly installed in the lock hole, a limiting ball is inserted into the cylinder, and a spring is connected between the interior of the cylinder and the limiting ball; according to the utility model, the operation process is greatly simplified, in the testing process, the operation of mounting and dismounting the indicator diagram testing instrument or other operations by starting and stopping for multiple times is not needed, and the indicator diagram testing instrument can be mounted and dismounted without stopping only by aligning the U-shaped opening of the tool with the polish rod and slightly buckling the U-shaped opening.

Description

Technical Field

[0001] This utility model belongs to the technical field of dynamometer card testing for coalbed methane well pumping units, and specifically relates to an auxiliary tool for testing dynamometer cards for coalbed methane well pumping units. Background Technology

[0002] Coalbed methane (CBM), as a clean energy source, occupies an increasingly important position in my country's energy structure. The normal operation of CBM well pumping units plays a crucial role in the extraction efficiency and quality of CBM. Dynamogram (DDM) testing is an important means of assessing the working status of pumping units, diagnosing downhole faults, and optimizing production parameters. Through DDM testing, the changes in load and displacement of the pumping unit during operation can be intuitively understood, thereby determining the working condition of the pumping pump, the elastic deformation of the tubing, the position of the fluid level, and whether there are faults such as sand jamming or gas lock. Accurate DDM test results can provide a scientific basis for the production management of CBM wells, help to adjust production parameters in a timely manner, and take targeted measures to deal with downhole anomalies, effectively extending the pump inspection cycle.

[0003] Currently, in the dynamometer card testing of coalbed methane well pumping units, a two-worker operation is commonly used. The specific operation process is as follows: First, two workers need to install the dynamometer card tester by stopping the pumping unit twice and adjusting the position of the No. 3 square clamp. After installation, the pumping unit is restarted and allowed to run for a certain period of time to allow the test equipment to collect sufficient data. Then, two workers need to stop the pumping unit twice and adjust the position of the No. 3 square clamp to disassemble the dynamometer card tester, remove the test equipment, and read and record the test data. To obtain comprehensive dynamometer card information, this operation usually needs to be performed multiple times, requiring at least four shutdowns. This traditional testing method has many drawbacks. First, the operation is cumbersome. Each shutdown and startup of the pumping unit requires strict adherence to operating procedures, involving multiple steps and stages, such as turning off the power, checking the equipment status, and adjusting control parameters. The two workers need to cooperate closely, and any mistake in any stage may lead to test failure, equipment damage, or personal injury. Moreover, due to the cumbersome operation and long shutdown time, the probability of downhole pump jamming and other malfunctions is greatly increased. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary tool for testing the dynamometer card of a coalbed methane well pumping unit, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An auxiliary tool for testing the dynamometer card of a coalbed methane well pumping unit, comprising:

[0007] The gas extraction tree has a light rod inside, which moves up and down inside the gas extraction tree. A suspension rope device is movably sleeved on one side of the light rod. A No. 1 square clip and a No. 2 square clip are installed on the side of the light rod near the suspension rope device by bolts. A No. 3 square clip is installed on the side of the light rod near the top of the gas extraction tree by bolts.

[0008] An auxiliary device is installed on the light rod between the No. 3 square clamp and the gas-collecting tree. The auxiliary device includes a main body with a U-shaped cross-section. A locking hole is provided on the inner side of the main body. A cylinder is fixedly installed inside the locking hole. A limit ball is inserted into the cylinder. A spring connects the cylinder and the limit ball.

[0009] Preferably, there are four lock holes, which are symmetrically arranged on both sides of the interior of the main body.

[0010] Preferably, the limiting ball slides and fits against the inner wall of the cylinder.

[0011] Preferably, a handle is fixedly installed on one side of the outer side of the main body.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) This utility model greatly simplifies the operation process. During the test, there is no need to start and stop the machine multiple times to install and disassemble the dynamometer test instrument or perform other operations as in the past. The operator only needs to align the U-shaped opening of the tool with the light rod and gently snap it down to install and disassemble the dynamometer test instrument without stopping the machine. Because the start and stop operation process of the employees is simplified, the test time is shortened, and more test data can be collected in a shorter time, so as to have a more comprehensive understanding of the working status of the pumping unit.

[0014] (2) This utility model is simple to operate, reduces the number of manual intervention links, and reduces the probability of human error. Operators only need to follow simple steps to attach the tool to the rod without complicated adjustments or operations. This reduces the frequency of contact with electrical equipment and mechanical moving parts, and reduces the risk of personnel safety accidents. This auxiliary tool greatly improves the convenience and safety of operators in the work.

[0015] (3) The limiting ball inside the locking hole on both sides of the inner wall of this utility model can be tightly attached to the surface of the smooth rod under the action of the spring, which plays a role in preventing detachment. During the test, even if the smooth rod is subjected to a certain vibration or external force, the tool will not easily fall off. This greatly reduces the risk of the tool falling off and avoids the situation that the tool may injure the operator or damage the equipment. At the same time, through the anti-detachment design, the operator does not need to hold the tool for a long time during the test. The operator only needs to hold the handle briefly when installing and disassembling the tool, which greatly reduces the contact time between the hand and the tool, thereby effectively avoiding the situation of the hand being squeezed.

[0016] (4) The U-shaped structure design of this utility model enables the tool to automatically be centered and vertical on the polished rod. During the unloading process, this positional relationship can ensure uniform force distribution and prevent the tool from coming off or being damaged due to uneven force distribution. Through its unique U-shaped structure and multiple sets of locking holes, this auxiliary tool can adapt to polished rods of different specifications and models. Regardless of the diameter of the polished rod, the auxiliary tool can achieve stable cooperation with the polished rod by adjusting the position of the limiting ball and the pressure of the spring. This allows the auxiliary tool to play a good role in different coalbed methane wells and ensure the accuracy and reliability of the test results under different working conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model installed on the optical rod;

[0018] Figure 2 This is a schematic diagram of the limiting ball position structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the handle position structure of this utility model;

[0020] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 5 This is a top view of the structure of this utility model.

[0022] In the diagram: 1. Gas-collecting tree; 11. Bare pole; 12. Suspension rope device; 13. Square clamp No. 1; 14. Square clamp No. 2; 15. Square clamp No. 3; 2. Auxiliary device; 21. Main body; 22. Lock hole; 23. Cylinder; 24. Limiting ball; 25. Spring; 26. Handle. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1:

[0025] Please see Figure 1 - Figure 5 As shown, an auxiliary tool for testing the dynamometer card of a coalbed methane well pumping unit includes:

[0026] The gas extraction tree 1 has a polished rod 11 inside. The polished rod 11 moves up and down inside the gas extraction tree 1. A suspension rope device 12 is movably sleeved on one side of the polished rod 11. A first square clip 13 and a second square clip 14 are bolted to the side of the polished rod 11 near the suspension rope device 12. A third square clip 15 is bolted to the side of the polished rod 11 near the top of the gas extraction tree 1.

[0027] Auxiliary device 2 is set on the light rod 11 between the No. 3 square clamp 15 and the gas collection tree 1. Auxiliary device 2 includes a main body 21 with a U-shaped cross-section. A locking hole 22 is opened on the inner side of the main body 21. A cylinder 23 is fixedly installed inside the locking hole 22. A limiting ball 24 is inserted inside the cylinder 23. A spring 25 is connected between the cylinder 23 and the limiting ball 24.

[0028] Specifically, there are four lock holes 22, which are symmetrically arranged on both sides inside the main body 21. The limiting ball 24 slides against the inner wall of the cylinder 23, and a handle 26 is fixedly installed on one side of the outside of the main body 21.

[0029] As can be seen from the above, the locking hole 22 is used to install the limiting ball 24. The spring 25 can drive the limiting ball 24 to reset. The cylinder 23 can ensure the linear movement of the limiting ball 24. When the tool is fastened to the polished rod 11 of the pumping unit, the polished rod 11 enters the U-shaped groove, which will squeeze the limiting ball 24 in the locking hole 22. At this time, the spring 25 is compressed, and the limiting ball 24 partially retracts into the locking hole 22, so that the tool can be smoothly fitted onto the polished rod 11. As the tool is further fastened, when the limiting ball 24 passes a certain position of the polished rod 11, the elastic force of the spring 25 pushes the limiting ball 24 out, so that it is pressed tightly against the surface of the polished rod 11. Due to the friction between the limiting ball 24 and the polished rod 11 and the continuous force of the spring 25, the tool is firmly fixed on the polished rod 11. Even when the polished rod 11 is subjected to vibration or external force, it will not easily fall off. The handle 26 is set on the back of the tool for easy gripping by the operator.

[0030] Before use, carefully inspect all parts of the tool for damage. Check the spring 25 and the limiting ball 24 inside the locking hole 22 for proper function and for any looseness or damage. Check the handle 26 for firmness and for any cracks or damage on its surface. As the polished rod 11 begins to descend, the operator holds the handle 26 of the auxiliary tool with both hands, aligns the U-shaped opening of the tool with the polished rod 11 of the pumping unit, and slowly moves the tool toward the polished rod 11, allowing the polished rod 11 to enter the U-shaped groove. During the locking process, carefully observe the state of the limiting ball 24. When you feel the limiting ball 24 retract into the locking hole 22 after being squeezed by the polished rod 11, continue to apply force until the limiting ball 24 passes the specific position of the polished rod 11 and pops out, thus securing the tool. The tool is now firmly fixed to the surface of the polished rod 11. Then, as the third square clamp 15 sits on the tool, the polished rod 11 stops moving. As the donkey head continues to descend, the suspension rope device 12 and the second square clamp 14 are unloaded. Once the unloading distance is greater than the thickness of the dynamometer card test instrument, the operator quickly places the dynamometer card test instrument between the suspension rope device 12 and the second square clamp 14. When the donkey head moves upward, the dynamometer card test instrument is loaded. The operator quickly removes the auxiliary tool, starts the dynamometer card test equipment, and begins collecting load and displacement data of the pumping unit's polished rod 11. During the test, the operator can stay away from the danger zone and observe the changes in test data through the test equipment's display screen or remote monitoring system.

[0031] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An auxiliary tool for testing the dynamometer card of a coalbed methane well pumping unit, characterized in that, include: A gas extraction tree (1) is provided inside the gas extraction tree (1). The light rod (11) moves up and down inside the gas extraction tree (1). A suspension rope device (12) is movably sleeved on one side of the light rod (11). A first square clip (13) and a second square clip (14) are installed on the side of the light rod (11) near the suspension rope device (12) by bolts. A third square clip (15) is installed on the top of the gas extraction tree (11) near the light rod (11). Auxiliary device (2) is set on the light rod (11) between the No. 3 square clamp (15) and the gas collection tree (1). The auxiliary device (2) includes a main body (21). The main body (21) has a U-shaped cross-section. A locking hole (22) is opened on the inner side of the main body (21). A cylinder (23) is fixedly installed inside the locking hole (22). A limiting ball (24) is inserted inside the cylinder (23). A spring (25) is connected between the cylinder (23) and the limiting ball (24).

2. The auxiliary tool for testing the dynamometer card of a coalbed methane well pumping unit according to claim 1, characterized in that, There are four lock holes (22), which are symmetrically arranged on both sides inside the main body (21).

3. The auxiliary tool for testing the dynamometer card of a coalbed methane well pumping unit according to claim 1, characterized in that, The limiting ball (24) slides and fits against the inner wall of the cylinder (23).

4. The auxiliary tool for testing the dynamometer card of a coalbed methane well pumping unit according to claim 1, characterized in that, A handle (26) is fixedly installed on one side of the outer side of the main body (21).

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