Oil drilling fluid (mud) is mainly composed of four parts: water, active solid phase, inert solid phase and chemical treatment agent. According to the proportion and interaction of each component, different components and different properties of mud can be formed. Therefore, mud composition is the key factor to adjust the performance.
In the preparation and treatment of mud, the traditional preparation method is difficult to achieve the high shear force required for direct hydration of soil and polymer, so it requires a long preparation and treatment time. The SP shear pump developed by KOSUN can quickly prepare high performance mud, greatly shorten the preparation time of mud and improve the economic benefit of drilling.
Use and maintenance method of KOSUN SP series shear pump:
1. After each use, circulate the pipeline and shear pump with clean water to avoid debris blocking the flow path and nozzle of the impeller;
2. Check the machine oil
level of the oil pool in the support before use. If it is insufficient, it
should be replenished.
3 packing box packing and
mechanical seal two.When the seal fails, it should be replaced in time.
4. When using the mechanical
seal, it is strictly forbidden not to empty the liquid, so as to avoid damage
to the mechanical seal. When the lubricating and cooling oil of the mechanical
seal is insufficient, it should be timely supplemented.
Xi ‘an KOSUN is a professional company providing comprehensive solutions for oily sludge treatment in the field of energy conservation and environmental protection, focusing on the development and service of complete sets of technologies and equipment such as reduction and resource utilization of oily sludge.
1. Oily sludge generated by crude oil exploitation
The oily sludge generated in the process of crude oil exploitation mainly comes from the ground treatment system. The oily sludge generated in the process of oil production sewage treatment, together with the flocs formed by the water purification agent added in sewage purification treatment, the corrosion products and scale of equipment and pipelines, and bacteria (corpse), etc., constitute the oily sludge. This kind of oily sludge generally has the characteristics of high oil content, high viscosity, fine particle size and difficulty in dehydration, which not only affects the quality of crude oil, but also affects the water quality of injection in profile control of injection Wells and leads to the difficulty in reaching the standard of effluent.
2. Oily sludge is generated
in the process of oilfield technology
Oily sludge may also mainly come from oil storage tanks, sedimentation tanks, sewage tanks, grease trap bottom sludge, oil sands and sludge removed from oil and water treatment facilities of refinery, light hydrocarbon processing plants and natural gas purification devices, as well as crude oil and oily sludge landed from drilling, operation and pipeline perforation. When storing oil in oil storage tank, a small amount of mechanical impurities, sand grains, soil, heavy metal salts, paraffin and asphaltene and other heavy oil components in oil products are deposited at the bottom of oil tank, forming oil sludge at the bottom of tank. In addition, the sewage from primary settling tank, secondary settling tank and well washing water recovery tank can also produce oily sludge.
3. Oily sludge generated from the sewage treatment plant of the refinery
The oily sludge in the sewage treatment plant of the refinery mainly comes from the bottom sludge of the oil separation tank, the scum of the flotation site and the bottom sludge of the original oil tank, commonly known as “three mud”. These oily sludge consists of different compositions, usually with an oil content of 10%~50%, an moisture content of 40%~90%, and a certain amount of solids.
KOSUN MD series high efficiency mud cleaner is the second and third level solid control equipment in the drilling fluid purification system, which can further separate the smaller particles solid phase contained in the mud treated by the shaker, so that the mud can enter the fourth level separation equipment. The mud cleaner can be used alone, or its bottom flow vibrating screen can be used as a parallel standby device of the first solid control vibrating screen.
Precautions for use of KOSUN MD series mud cleaner:
1. The hydrocyclone is an important separation and classification equipment of mud cleaner. In the process of use, special attention should be paid to the maintenance of the hydrocyclone.
2. When the fluid ejected
from the cyclone group is not uniform umbrella shape, the appropriate knob drip
nozzle, and observe until return to the normal state.
3. For the use effect and
service life of the hydrocyclone, the drip nozzle and other parts should be
cleaned and maintained normally.
4. When the bottom flow
screen does not move in accordance with the prescribed track, the installation
direction may be wrong or there is a problem with the motor circuit, the power
should be immediately disconnected to check the motor or circuit, to ensure its
return to normal.
5. If the bottom flow sieve
appears the phenomenon of running pulp or blocking the sieve, the Angle of the
sieve box should be adjusted in time, and ensure that the selected sieve mesh
is suitable for the mud to be treated.
6. Always observe and test
the bottom flow screen. The damaged screen should be replaced or repaired in
time. After each time out of use to the bottom flow screen and screen do
necessary cleaning.
7. Regular cleaning and inspection should be carried out on each part of the mud cleaner to ensure the use effect and service life.
At present, solid control equipment focuses on the development of desander, desilter, degasser and other equipment with small occupation area, high efficiency and long life, and integrates with high-speed centrifuge to realize automatic detection and control of solid control system according to the test results.
Xi ‘an KOSUN is a leader in the solid state control industry of oil drilling in China and a comprehensive service provider of solid state control and waste disposal of oil drilling in the world. Since its establishment in 1992, xi ‘an KOSUN has been the main supplier of solid control products in the field of petroleum and natural gas drilling equipment in China, as well as the oldest and only centrifuge manufacturer in five northwestern provinces of China, and the producer of high-frequency vibration drying of the first generation drilling fluid in China.
The whole drilling fluid solid control system of KOSUN can be separated and connected between tanks and silos to meet the needs of drilling operations. The system is equipped with 5-level purification equipment, contains shale haker, vacuum degasser, desander cleaner, desilter and centrifuge, etc., the use of drilling fluid solid control system, can effectively reduce the waste mud, reduce the cost of drilling, protect the environment around the well site.
According
to the requirements of field operation, KOSUN can provide customers with mobile
vehicle-mounted fixed control system, saving space and facilitating
transportation.
The performance and quality of drilling fluid solid control equipment is the key to solid control technology. Drilling fluid solids control system mainly includes the drilling fluid circulating tank, drilling fluid purification treatment equipment and electric control equipment three parts, including drilling fluid purification treatment equipment mainly include shale shaker, desander, desilter, degasser, centrifuge, sand pump, mixer, etc., aiming at environmental sensitive areas, can also configure cuttings recycling and waste liquid processing equipment.
KOSUN liquid and gas separator is a special equipment for primary degassing of drilling fluid.
When the liquid and gas separator is not in use, clean the drilling fluid in the equipment and wash it with water. It is strictly forbidden to store the mud in the separator to prevent the mud from being used normally after it is dry and solid.
In general, the liquid and gas separator is installed on the side ground of the mud tank. The ground shall be horizontal, solid and equipped with anchor bolt pit.
When
installation, use crane to lift the lifting lug on the top of the main body to
lift vertically with the ground, slowly put it down, and then use steel wire
rope from the upper part of the main body and the ground to take up, to ensure
the main body and the ground is vertical, casting anchor bolts, fastening.
After installation, direct the exhaust line to a distance of 60-80m from the wellhead. The slurry inlet is connected with the rotary blowout preventer or throttle manifold, close the blowout butterfly valve, open the slurry outlet butterfly valve, and connect the pipe line to the mud tank.
When handling, remove the manifold, loosen the tension wire rope, use the crane to lift the top of the main body, loosen the anchor bolt to place the horizontal, at this time the ladder can be used as a handling support.
Features and advantages of KOSUN liquid and gas separator:
1.
Separate and expel large amounts of free gases from your system, including
toxic gases such as hydrogen sulfide;
2.
The separated gas is discharged to the safe area of the wellsite through the
discharge nozzle path for combustion;
3. The equipment is coated with anti-corrosion coating, which can extend the service life when dealing with corrosive gases.
KOSUN production of MD series drilling mud cleaner, is the secondary and third level drilling mud purification system of solids control equipment used to separate the vibration screen processed of smaller particles contained in mud solid phase, so that the mud into the subsequent separation equipment, MD series mud cleaner can be used alone, also can use its underflow vibrating screen as primary solids control parallel backup device of vibrating screen.
Drilling mud cleaner is the second and third level solid control equipment of drilling mud. It is a combination of desander hydrocyclone, desilter hydrocyclone and bottom flow vibration screen. The mud cleaner is compact in structure, small in space and powerful in function. It is an ideal and efficient cleaning equipment for the second and third stage solid phase control of drilling mud.
Features of KOSUN drilling mud cleaner:
1.
The cleaner is compact in structure, small in space and powerful in function;
2.
The number and materials of customized hydrocyclone are available; Its material
can be made of polyurethane, high chromium cast iron or ceramic and other
wear-resistant materials.
3. The clamshell desilting hydrocyclone is equipped with stainless steel ball valve for easy maintenance;
4.
The vibration motor is Martain motor, reliable in quality;
KOSUN Vacuum degasser is a kind of special degasser for treating gas-immersed drilling fluid, and its degasser rate is up to 95%, which is suitable for all kinds of oil drilling solid control system. It plays an important role in restoring mud proportion, stabilizing mud viscosity and reducing drilling cost. At the same time, it can also be used as high power agitator.
KOSUN vacuum degasser used vacuum suction effect, cause negative pressure zone in a vacuum tank, mud under the action of atmospheric pressure, through the suction pipe into the hollow shaft of rotor, again by the window around the hollow shaft, the jet shaped into the tank wall, round due to the collision and separation effect, make the separation of drilling fluid into thin layer, immersed in the mud bubbles, gas evolution, through hollow pump suction and the separation of gas water separator, the exhaust pipe line to the safety of gas by the separator, the mud by the impeller discharge outside the tank. Since the main motor starts first and the impeller connected to the motor rotates at high speed, the mud can only enter the tank from the suction pipe, but not from the drainage pipe.
Operation rules of KOSUN vacuum degasser:
1. The installation of vacuum degasser requires smooth connection and reliable fastening, and the exhaust outlet is connected to the safe position outside the wellsite according to the well control requirements;
2. Before the vacuum degasser starts, the end of the drain pipe and suction pipe should be immersed in the mud at the same time, otherwise it will not work normally;
3. After the vacuum degasser is started, check the rotation direction of the motor, which should be consistent with the direction indicated by the arrow on the tank and pump. The water in the pump and the air-water separator must be drained;
KOSUN’s production of drilling mud solid control system consists of linear vibrating screen, vacuum degasser, desander, desilter, horizontal spiral sedimentation centrifuge and solids control equipment such as mud tank, the functions of component integration on the base of a whole, the production, the assembly is done in the factory, has convenient installation, easy to migrate, cover an area of an area small, etc.
Recently, a complete set of solid control system produced by KOSUN has arrived at the CNOOC offshore drilling artificial island project site and put into use. This set of fixed control system is applied to offshore drilling platform. KOSUN strictly control the production quality, to ensure that products meet quality standards, process can completely satisfy the level 5 of drilling fluid solids control (screening – degassing – except sand silt – centrifugal), shipment of the equipment at the same time, KOSUN’s solid control system technical service team to the scene, to be responsible for guiding system box installation debugging, and the construction of personnel training for equipment operation and maintenance.
The oil solid control system is used to separate and treat cuttings, mud and sand particles in drilling fluid, maintain drilling fluid performance and store circulating drilling fluid.It is equipped with a weighted mixing device, a perfusion device and a chemical injection device.To improve the physical and chemical properties of drilling fluids to meet drilling requirements.
KOSUN’s screw conveyor is widely used in various industries, such as building materials, chemical industry, electric power, metallurgy, coal mine coal, food and other industries, applicable to horizontal or oblique conveying powder, granulated and small lump materials, such as coal, ash, slag, cement, food, etc., the material temperature is less than 200 ℃.Screw conveyor does not transport perishable, viscous, easy to agglomerate materials.In the concrete mixing station, the screw conveyer’s function has obtained the biggest embodiment.
When the screw shaft rotates, the material can only move forward along the bottom of the conveyor under the push of the blade due to the gravity and friction generated by the wall of the tank, which is like the translational movement of the nut that cannot be rotated along the rotating screw rod.The movement of materials in the intermediate bearing depends on the thrust of materials moving forward from behind.So the transport of materials in the conveyor is a complete slip movement.In order to make the screw shaft in a favorable tension state, the drive device and discharge port are generally placed at the same end of the conveyor, and the feeding port is placed near the tail of the other end as far as possible.The rotating screw blade pushes the material forward for conveying, and the force that prevents the material from rotating together with the screw conveyor blade is the weight of the material itself and the friction resistance of the screw conveyor housing on the material.The profile of the blade can be divided into solid profile, belt profile and blade profile according to different materials.The screw shaft of the screw conveyor has thrust bearing at the end of the movement direction of the material to counter the axial force of the screw with the material. When the length is longer, the intermediate suspension bearing should be added.
Screw conveyor in the use of the process, must pay attention to the daily maintenance, so as to ensure maximum production and efficiency, but also make the service life of the equipment extended.
1. Lubricating oil should be added to the transmission parts such as bearings, gears and chains on a regular basis;
2. After the screw conveyor is out of service, the wear condition of the screw blade shall be checked, and if the wear is serious, it shall be repaired by welding;
3. The conveying quantity shall not be overloaded, otherwise the material cannot be discharged, causing the screw shaft to bend and the box to swell and damage;
4. When the conveying medium has a high degree of mobility, pay attention to whether the expansion and contraction of the box body is free and there is no stuck place;
5. When the conveyor is in operation and the noise is harsh, the cover shall be opened for inspection and troubleshooting.
Kosun’s vacuum degasser is a special equipment used to process gas cut drilling fluid.It is suitable for all kinds of supporting equipment and plays an important role in restoring mud weight, stabilizing mud viscosity and reducing drilling cost.At the same time, it can also be used as a high-power agitator.
Vacuum degasser used vacuum pump suction effect, cause negative pressure zone in a vacuum tank, mud under the action of atmospheric pressure, through the suction pipe into the hollow shaft of rotor, again by the window around the hollow shaft, the jet shaped into the tank wall, due to the collision and separating the role of the wheel, to separate the drilling fluid into a thin layer of mud invasion of bubble, gas evolution, through vacuum pump suction and the separation of gas water separator, the exhaust pipe line to the safety of gas by the separator, the mud by the impeller discharge outside the tank.Since the main motor is started first, the impeller connected to the motor is in a state of high-speed rotation, so the mud can only enter the tank from the suction pipe, not from the discharge pipe.
Features and advantages of corun’s vacuum degasser in drilling operation:
1.Self-priming devices do not require centrifugal pumps to attack drilling mud
2.Eliminates corrosion and reduces repair and maintenance costs
3.Compact design and small footprint
4.The suction pipe is inserted into the mud tank and can be used as a high-power agitator under the condition of no gas cut in the mud
5.Mud through the window of the rotor to tell the four walls, mud bubbles broken thoroughly, degassing effect is good.
