CN204960922U - Bailing formula beam -pumping unit load testing arrangement - Google Patents

Abstract

<b>The utility model discloses a load testing device for a lifting type pumping unit. The device includes a derrick beam, one end of the derrick beam is provided with a large pulley, and a flexible sucker rod is sheathed on the big pulley. The other end of the flexible sucker rod is wound and connected with the reel; the derrick beam is provided with a mounting bracket, the top surface of the mounting bracket is provided with a load test wheel, and both sides of the load test wheel are respectively provided with compression wheels; The test wheel is located below the flexible sucker rod and is rollingly connected with the flexible sucker rod, and the pressing wheel is located above the flexible sucker rod and is rolledly connected with the flexible sucker rod. The utility model successfully solves the technical problem that the load testing equipment cannot be installed because the lifting type pumping unit has no rope suspension device, and can facilitate the analysis of the working conditions of the oil well. The device has simple structure and convenient installation. </b>

Description

A load testing device for lifting type pumping unit

technical field

The utility model relates to a load testing device for a lifting type pumping unit, which belongs to the technical field of well testing devices in oil fields.

Background technique

The lifting type pumping unit is a new type of pumping unit, which adopts a different displacement lifting method from the traditional pumping unit. The lifting type pumping unit is connected with the relevant equipment in the well by flexible sucker rods. During the upstroke, the motor drives the reel to rotate through the transmission device, and the flexible sucker rod is wound on the reel, thereby driving the plunger to move upwards. The oil well pump is lifted to a predetermined height. During the down stroke, the electric motor reverses, and depends on the self-weight of downhole related equipment such as oil well pump and flexible sucker rod to drop to the predetermined position downhole to complete a pumping cycle. After one oil pumping cycle is completed, according to the situation of downhole crude oil recovery, wait for a period of time before proceeding to the next oil pumping cycle. Compared with the traditional pumping unit, it has the characteristics of large stroke and long operation period. However, the lift pumping unit has canceled the traditional rope hanger, so the traditional load testing equipment cannot be installed. Because the lifting pumping unit is not equipped with load testing equipment, the analysis of oil well conditions is greatly restricted.

Utility model content

The purpose of the utility model is to provide a load testing device for a lifting type pumping unit to solve the technical problem that the oil well working conditions cannot be analyzed when the lifting type pumping unit is used, so as to overcome the deficiencies in the prior art.

The technical scheme of the utility model is achieved in that:

A load testing device for a lifting type pumping unit of the present utility model is as follows: the device includes a derrick beam, one end of the derrick beam is provided with a large pulley, a flexible sucker rod is sleeved on the big pulley, and one end of the flexible sucker rod is connected to the related equipment in the well. connection, the other end of the flexible sucker rod is wound and connected with the reel; the derrick beam is provided with a mounting bracket, the top surface of the mounting bracket is provided with a load test wheel, and both sides of the load test wheel are respectively provided with a compression wheel; the load test wheel is located at The flexible sucker rod is below the flexible sucker rod and is rollingly connected with the flexible sucker rod, and the pinch wheel is located above the flexible sucker rod and is rolledly connected with the flexible sucker rod.

In the aforementioned device, a group of pressure sensors are uniformly distributed along the circumference of the wheel groove of the load testing wheel.

In the aforementioned device, the pressing wheel is connected to the top surface of the mounting bracket, and the lowest point of the wheel groove of the pressing wheel is lower than the highest point of the wheel groove of the load testing wheel.

In the aforementioned device, the top surface of the mounting bracket is parallel to the axis of the flexible sucker rod.

Due to the adoption of the above-mentioned technical scheme, compared with the prior art, the utility model successfully solves the technical problem that the load testing equipment cannot be installed because the hoisting type pumping unit does not have a rope suspension, and can facilitate the analysis of the working conditions of the oil well . The utility model does not need to modify the existing lifting type oil pumping unit for the improvement of the lifting type oil pumping unit, so no adverse effect will be produced on the work of the existing lifting type oil pumping unit. It is only necessary to install a set of detection device on the existing derrick beam, and the detection device is not affected by the angle between the flexible sucker rod on both sides of the large pulley; it is not necessary to loosen the two ends of the flexible sucker rod during installation, just let the flexible sucker rod When the oil rod is in a relaxed state, the flexible sucker rod can be squeezed into the wheel grooves of the load test wheel and the pressure wheel of the detection device. The installation is very convenient and can be constructed on site. The device of the utility model has simple structure and low modification cost. If it is not needed, it only needs to dismantle the detection device. It has good recovery performance and can be widely used on lifting oil pumping units, which has promotional significance.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Figure 2 is the force vector diagram on the load test wheel.

The marks in the accompanying drawings are: 1-derrick beam, 2-big pulley, 3-flexible sucker rod, 4-installation bracket, 5-load test wheel, 6-pressing wheel.

detailed description

The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, but not as any limitation to the utility model.

Example

The utility model is constructed according to the following method for installing a load testing device on the lifting pumping unit, as shown in Figure 1: the method is to fix a device on the derrick beam of the lifting pumping unit Bracket, the top surface of the installation bracket is parallel to the flexible sucker rod, and then a load test wheel is fixed on the top surface of the installation bracket. There are pinch wheels on both sides of the load test wheel, and the flexible sucker rod is sequentially lifted from the bottom of the pinch wheel and the load The test wheel passes through and is wound on the drum connected to the motor; the tensile load F of the flexible sucker rod is calculated by measuring the centripetal pressure F1 of the flexible sucker rod on the load test wheel. The load test wheel is located in the middle of the top surface of the mounting bracket and pushes up the flexible sucker rod; the pressure wheel is located on both sides of the load test wheel and presses down the flexible sucker rod; the flexible sucker rod is placed on the load test wheel Bending occurs to create a centripetal pressure F1 on the load test wheel. Pressure sensors are evenly distributed on the bottom of the wheel groove of the load test wheel, and the centripetal pressure F1 of the flexible sucker rod on the load test wheel is measured by the pressure sensor; the tensile load F of the flexible sucker rod is calculated by the following formula through the centripetal pressure F1:

F=F1÷(2×cosθ)

where: F1 is the centripetal pressure formed by the flexible sucker rod on the load test wheel,

θ is the angle between the centripetal pressure F1 and the side tension load F of the displacement test wheel.

According to the above-mentioned method, a load testing device for a lifting type pumping unit of the present invention is formed, as shown in Figure 1, the device includes a derrick beam 1, and a large pulley 2 is arranged at one end of the derrick beam 1, and the large pulley 2 is covered with a Flexible sucker rod 3, one end of the flexible sucker rod 3 is connected with related downhole equipment, and the other end of the flexible sucker rod 3 is wound and connected with the reel; the derrick beam 1 is provided with a mounting bracket 4, and the top surface of the mounting bracket 4 is provided with The load test wheel 5 is provided with compression wheels 6 on both sides of the load test wheel 5; Above and rolling connection with the flexible sucker rod 3. A group of pressure sensors are evenly distributed along the circumference in the wheel groove of the load test wheel 5 . The pressing wheel 6 is connected to the top surface of the mounting bracket 4, and the lowest point of the wheel groove of the pressing wheel 6 is lower than the highest point of the wheel groove of the load testing wheel 5. The top surface of the mounting bracket 4 is parallel to the axis of the flexible sucker rod 3 .

Claims (3)

1. a bailing formula oil pumper load test device, comprise derrick panel (1), derrick panel (1) one end is provided with large pulley (2), the upper cover of large pulley (2) has flexible rod (3), flexible rod (3) one end is connected with down-hole relevant device, and flexible rod (3) other end and reel are intertwined and connected; It is characterized in that: described derrick panel (1) is provided with mounting bracket (4), mounting bracket (4) end face is provided with load test wheel (5), and load test wheel (5) both sides are respectively equipped with contact roller (6); Load test wheel (5) is positioned at flexible rod (3) below and rolls with flexible rod (3) and is connected, and contact roller (6) is positioned at flexible rod (3) top and rolls with flexible rod (3) and is connected; Described contact roller (6) is connected with mounting bracket (4) end face, and the race minimum point of contact roller (6) takes turns the race peak of (5) lower than load test.

2. the oil pumper of bailing formula according to claim 1 load test device, is characterized in that: be uniformly distributed with one group of pressure sensor along the circumference in the race of described load test wheel (5).

3. the oil pumper of bailing formula according to claim 1 load test device, is characterized in that: the axis being parallel of described mounting bracket (4) end face and flexible rod (3).