Sand removal equipment is often eroded, resulting in solid particle deposition and pipe blockage. In order to solve this problem, a solid-phase/liquid-phase swirling desander device has been developed for separating and eliminating solid particles in well fluids. Compared with the traditional filter desander, kexun swirl desander has the characteristics of compact structure and high working efficiency.
Working principle of cyclone desander:
The basic principle of the cyclone desander is to use centrifugal force to introduce the fluid tangential direction into the conical shell of the cyclone desander. The gravity action pushes the solid particles to the surface of the cone and runs down to the outlet of the separator. The secondary liquid swirl generated in the separation shell causes the liquid to migrate upward and discharge from the overflow port through the swirl detector. The smaller the diameter of the desander cyclone is, the greater the separation effect will be.
Features of KOSUN cyclone desander:
Simple structure, easy operation, safe and reliable use, almost no maintenance;
Compared with the expanded pipe, buffer box and other sand removal equipment, it has the advantages of small volume, large processing capacity and saving field space;
Sand can be removed from the water during the continuous water supply;
It avoids the phenomenon of secondary pollution of water quality in other ways of sand removal and has high efficiency of sand removal.
It is recognized at home and abroad that mud solid control equipment is one of the important symbols of scientific drilling. Through the continuous improvement and improvement of drilling fluid solid-phase control equipment in recent 10 years, it has a significant effect on improving drilling technology, reducing the maintenance workload of circulation system, ensuring the performance of drilling fluid, reducing downhole accidents, increasing drilling speed and reducing cost.
Prior to the 1970s, the petroleum drilling industry used extremely crude drilling fluid shale shaker, with a separation size of only 400 microns and solid particles re-entering the mud circulation system.Later, ultra-fine vibrating screen, cyclone desander, mud desander, drilling fluid centrifuge, vacuum degasser, mud mixer, slurry distribution device, mud tank and electrical operation cabinet, with the total weight of more than ton, the total power consumption has been close to 300KW.Solid content can be controlled to a minimum of less than 5%, and the low-density properties of the drilling fluid can be adjusted as needed.
There is no doubt that these advances have brought about profound changes in the oil drilling industry. But at the same time also greatly increased the well team site repair, maintenance, use of the workload and consumption.Therefore, on the basis of constantly reducing the performance of the mud solid control system, it has become a very concerned issue for experts of mud solid control equipment at home and abroad to simplify the equipment, reduce energy consumption and improve reliability.
The solid-control system, also known as the drilling fluid purification system, is mainly used for solid-phase control and solid-liquid separation in the drilling fluid, so that the drilling fluid can be recycled. The solid control system is composed of 3-7 composite tanks, equipped with 4-stage purification equipment, suitable for oil drilling projects of 2000-7000m.This innovative system USES a composite tank with a tapered base and a mud mixer at the edges to prevent solid deposits in the drilling fluid. In addition, mud tanks and mud boxes can be separated or combined as required by the drilling process. Each tank is connected to each other through a network of pipes, and the suction valve is flexible when open and tight when closed.
As a manufacturer of solid control equipment that has passed the us API and ISO certification, KOSUN’s solid control system has also passed the European Union CE certification, which can meet the requirements of export developed countries. KOSUN’s solid control system has been exported to more than 60 countries and regions, has been unanimously recognized by customers, has accumulated a good reputation in the industry.
The solid control system for oil and gas drilling usually includes the following equipment:
1. The drilling fluid
vibrating screen can separate solid particles larger than 100 microns;
Shale shaker in preparation for operation, the technical personnel to carry out a basic inspection, especially the new shaker, but also to carry out a detailed inspection, inspection work completed, all aspects of the operation standard, you can start the shale shaker.
The matters needing attention in the use inspection of vibrating screen are:
Check whether the attached safety splint should be removed before starting;
Check whether the screen surface on the screen is pressed;
Check whether all locking parts are firm;
Check the connection between vibration motor and screen body;
Check the connection between rubber pad, screen body and frame;
Check the vibration motor;
Check the power supply voltage of the vibrating motor;
Check the interlock control device of the vibration motor;
The staff shall remove the end caps at both ends of the vibrating motor used on the shaker, and then check whether the phase Angle corresponding to the fan block is consistent. The staff shall then tighten the fastening screws of the fan block;
The installation angles of the two motors shall be consistent;
The ES translational elliptical shale shaker produced by KOSUN adopts the long tube vibration motor as the power source, which has superior performance, reasonable structure, stable operation, long service life and low maintenance cost. Under the same conditions, compared with other types of shaker, the drilling fluid processing capacity and sand transport and debris removal ability can be greatly improved, and can effectively overcome the phenomenon of “screen blocking” and “screen paste”.
KOSUN’s translational elliptical shale shaker has an obvious advantage in the treatment of highly viscous drilling fluids. Under this condition, the optimized translational elliptical vibration trajectory can effectively remove the viscous solid phase, so that the larger particles in the drilling fluid can be effectively removed. At the same time, relatively moderate vibration intensity can effectively reduce the consumption of vibrating screen.
For sludge, engineering technology can be adopted to extract and synthesize the organic matter and heavy metal elements rich in sludge, so as to realize energy recovery. At present, sludge can be treated in an anaerobic environment, so that the microorganisms contained in the sludge can be fully fermented and degraded, and finally produce methane gas. After the methane is collected, it can be used as clean fuel, and the residual solid can be used as organic fertilizer. In the protection of the environment at the same time, the realization of high resource requirements. In addition, there are a series of technologies such as low-temperature sludge oil production technology and sludge fuel utilization technology to realize energy utilization.
Sludge for building materials
Another way to solve the sludge disposal is using sludge production of building materials, asphalt, through engineering technology can achieve the sludge system sludge ceramics grain biochemical fiberboard, sludge, sludge system of ecological cement and other building materials, the sludge of waste disposal requirements, protection of the environment at the same time to achieve the sludge.
With the development of drilling technology, drilling depth is deeper and deeper, and mud requirements are more and more strict. Some complex geological conditions under the ordinary mud shaker can no longer meet the requirements of use. Moreover, the performance of the ordinary drilling vibrating screen is not very stable, and the effect of drilling vibrating screen treatment can not be adapted according to the drilling geology, often there will be some run-slurry or “horseshoe effect”. The appearance of the translational elliptical vibrating screen has solved these problems.
The translational elliptical vibrating screen USES 2 vibration motors of different sizes and keeps them on a datum level. Due to the different steering and excitation force of the two motors, the motion trajectory is elliptical. And the movement track of the whole sieve box of the translational elliptical vibrating screen is the same. The ellipse of the translational ellipse vibrating screen is different from the ordinary ellipse, the ellipse track and the screen have a certain Angle, so the “horseshoe effect” is avoided.
Advantages of translational elliptical vibrating screen:
The liquid-gas separator is mainly used to deal with large bubbles in drilling fluid. When gas invasion occurs, throttle exhaust operation should be carried out. When overflow occurs, kill the well; Drilling fluid enters the liquid-gas separator from the throttling manifold for degassing.
The drilling fluid separated from the above two conditions has small bubbles, which enter the vibrating screen for degassing, flow to the sunk sand bin, and then enter the vacuum degasser device for conventional degassing.
In the ultra-high pressure gas well drilling, because into the cylinder gas volume, liquid volume is very different. This requires that the treatment capacity of the separator should have a relatively wide range of adaptability, and its treatment capacity of gas and liquid should be able to meet the needs of well killing construction. In the design of the scheme, the following considerations should be taken into account:
The task of the liquid-gas separator is to deal with the continuous gas phase and large bubbles;
Provide appropriate residence time for small bubbles to gather in a certain depth below the liquid level;
Solid debris cannot be deposited in the separator;
Apart from the gas column reaching the wellhead, the separator can work normally.
The screw conveyor produced by xi ‘an KOSUN is used in the drilling waste disposal project, providing an effective and low-cost drillings transportation system for offshore drilling and land drilling devices. The screw conveyor adopts the combined structure of more than 12 feet in each section, which can be flexibly assembled and used in different drilling sites, with simple operation, stable structure, strong adaptability in working space and high safety performance. Thus, the working efficiency of the equipment is greatly improved and the cost and resources are saved. The screw blade of screw conveyor is made of wear-resistant material to ensure its service life.
When the screw shaft rotates, the material can only move forward along the bottom of the screw conveyor under the push of the blade due to the gravity of the material and the friction generated by the friction between the material and the tank wall, which is just like the translation movement of the unrotatable nut along the rotating screw. The movement of the material in the intermediate bearing depends on the thrust of the material moving forward behind it. Therefore, the material transport in the conveyor, is a complete slip motion. In order to make the spiral shaft in a more favorable tension state, generally will drive the device and discharge port on the same end of the conveyor, and the feed port as far as possible on the other end of the tail near. The rotating spiral blade moves the material and carries on the transportation, causes the material not to revolve together with the spiral conveyor blade the force is the material own weight and the screw conveyor casing to the material the friction resistance. According to the different materials, there are solid surface, belt surface and blade surface. The spiral shaft of the screw conveyor has a thrust bearing at the end of the direction of material movement. Intermediate hanging bearings should be added when the captain is longer.
The application of vertical cuttings dryer is currently at home and abroad to solve the drilling waste management in areas such as solid-liquid separation dryer mud treatment equipment, the traditional waste sludge treatment is used more pressure filter, but the operation is more troublesome, and the intensity of labor is big, cost is high, and drilling cuttings dryer is the modern solid-liquid separation, it does not need to add chemicals, cover an area of an area small, simple operation, low cost but also strong processing capacity, processing waste solid phase moisture content is low.
With the continuous improvement of national environmental protection requirements, major oil fields are faced with the problem of drilling waste disposal.
The vc-1000 series vertical cuttings dryer produced by KOSUN is a vertical scraper discharge centrifuge, which separates solid and liquid phases through centrifugal separation principle. Vertical cuttings dryer can effectively recover liquid components in cuttings, making solid phase transition very dry. It is suitable for water-based mud, oil-based mud and synthetic mud to recover the mud in cuttings, thus reducing drilling costs and environmental pollution. Its processing capacity is 40~60 tons per hour, and the liquid content/oil content of the treated cuttings is lower than 5%, meeting international emission standards and environmental requirements. It can be used for cuttings treatment in land and sea drilling.
While working, raise the support of driller to the highest place to meet the driller’s driller discharge. The centrifuge is placed on the tank body of the pry seat, and the discharged liquid part flows directly into the bottom collection tank. While drilling fluid is needed, it can be delivered via a delivery pump or connected to a tank of similar height.