How to clean tubing and sucker rod automatically during operation?
During loading operations in oilfield, surface of tubing and sucker rod always is stained with more crude oil when tubing and sucker rods are loaded out.
In traditional workover, generally, operators will not take care of them. Crude oil that sticking on the surface of the tubing is easy to fall on the well site and leads to environmental pollution. But sometimes, Some oilfields will require wellsite operators clean these crude oil by cotton scratches. However, artificial scratch is not clean, with large labor investment and high risk. Furthermore, scraped oil is easy to fall on the wellhead to cause pollution too.
At present, oilfield workover operations all require the removal of sucker rods and tubing with workover trucks for cleaning. Mixing of steam and hot water is commonly used for cleaning. The cleaning site is generally located at the operation site. If pollution occurs, the color strip cloth is generally used as the site for cleaning, placing oil pipes and sucker rods. At the same time as the cleaning operation, the waste liquid generated by mixed washing with steam and hot water also falls on the color strip cloth.
Each time the operation is completed, the color strips are polluted and become hazardous wastes, which need to be recycled and processed. There is a secondary pollution problem, which increases the operation cost. When using steam and hot water for mixed washing, it is a cleaning operation carried out in an atmospheric environment and cannot be used. It avoids the influence of the climatic environment and also causes a large amount of heat energy to be lost with the air. In the north, especially in winter, the heat energy loss is greater, and the speed of the cleaning operation is reduced.
In order to solve the above problems, the patented technology provides an on-site cleaning device and a cleaning method for a well workover operation tubing, a sucker rod. The technical scheme of the patented technology is: an on-site cleaning device for oil pipes and sucker rods for workover operations, including a receiving section, a cleaning section and a discharging section, and the bottoms of the receiving section, the cleaning section and the discharging section are on the same plane in sequence.
Active connection; the material receiving section includes a material receiving bracket, the front end of the material receiving bracket is provided with a gantry frame, the lower part of the gantry frame is provided with a material receiving infrared sensor, and the material receiving bracket platform at the rear of the gantry frame is provided with a material conveying conveyor The conveying conveyor extends to the end of the cleaning section.
The conveying conveyor consists of a conveying conveyor bracket, a bearing seat, a V-shaped roller, a splicing gear motor and a splicing chain drive mechanism. The V-shaped roller passes through the two ends. The bearing seat is connected with the bracket of the conveying conveyor, the flat key on the shaft on the left side of the V-shaped roller is connected to the sprocket, and the sprockets of each V-shaped roller are connected by a chain drive.
San Jack developed a new utility model which can provide a rotating oil brushing device, and automatically clean oil on the oil pipe surface when tubing and Sucher rods are pulled out from well, which avoid polluting environment at well site.
It works like the following.
Rotating crude oil cleaning device is equipped with circular brush which connects with pneumatic motor by variable speed drive mechanism. pneumatic motor is installed and fixed on a variable speed drive mechanism through spacer flange. Pneumatic motor is equipped with motor gears and with variable speed drive mechanism, drives the brush to rotate. when tubing are puller out of the well, the brush keeps running around tubing and clean off crude oil on the tubing.
The utility model has a simple structure, can automatically remove the crude oil adhered on the oil pipe, keep the surface of the oil pipe clear, prevent the crude oil from falling on the well site, and reduce environmental pollution.
The overall idea of the present invention is:
1). The on-site cleaning of sucker rods (tubing) in workover operations is limited to a semi-enclosed thermal field. The cleaning room and the atmospheric environment basically do not generate heat dissipation such as thermal circulation and thermal radiation, and minimize the number of sucker rods ( It also reduces the heat of cleaning the sucker rods (oil pipes) in the hot field, which changes the previous passive cleaning operation in the atmospheric environment, which consumes a lot of energy, saves energy, and is especially suitable for winter operations in the north;
2). The cleaning operation is carried out in a local semi-enclosed space, which can also achieve the purpose of not landing the waste water of the cleaning operation, reducing the auxiliary facilities of the operation, and avoiding the secondary pollution caused by the landing of the dirty oil.
3). Through the industrialization and automation of material receiving, cleaning and unloading, the labor intensity of operators and the number of operators are reduced, labor costs are reduced, and operation safety is improved.
The present invention has the following beneficial effects:
1). The on-site cleaning of sucker rods (tubing) in workover operations is limited to a semi-enclosed thermal field. The cleaning room and the atmospheric environment basically do not generate heat dissipation such as thermal circulation and thermal radiation and minimize the number of sucker rods (It also reduces the heat of cleaning the sucker rods (oil pipes) in the hot field, which changes the previous passive cleaning operation in the atmospheric environment, which consumes a lot of energy, saves energy, and is especially suitable for winter operations in the north;
2). The cleaning operation is carried out in a partial semi-enclosed space, which can also achieve the purpose of not landing the wastewater of the cleaning operation, reducing the auxiliary facilities of the operation, and avoiding the secondary pollution caused by the landing of the dirty oil;
3). Through the industrialization and automation of material receiving, cleaning and unloading, the labor intensity of operators and the number of operators are reduced, labor costs are reduced, and operation safety is improved.
