Domestic drilling mud in drilling waste management instrumentality performance level compared with foreign countries, there's still a spot, it's necessary for foreign solid management instrumentality gift state of affairs investigation and learn the technical advantage, promote our country's solids management instrumentality analysis and development of producing technology. This paper collected reception and abroad within the solid section analysis instrumentality mud desilter style, analysis, calculation and use, material and also the basis of analysis achievements, with the present within the mud desilter to some existing issues within the style a replacement form of mud desilter device theme. Connecting with the assembly apply, this paper primarily on the subsequent many aspects of the planning work:
(1) Through the domestic and foreign mud desilter connected assortment of knowledge analysis, found the domestic and foreign desilter characteristics and development direction, combined with domestic desilter technology state of affairs and lubricator solid section management the particular state of affairs planned preliminary style.
(2) in keeping with the mud desilter of the operating mechanism and conditions of use, advises the desilter the structure and also the main structure style.
(3) Through the intensive field investigation and technical demonstration, with China's a part of the oil field, first, from the facts, supported technical practicableness, structure of advanced BWCNQ100-8N sort desilter style theme and technical parameters.
(4) mistreatment computer-assisted technology style strategies, the prevailing solid management instrumentality supported the analysis results, and do the BWCNQ100-8N desilter theme style and theoretical calculation.
(5) within the structure style and mechanics analysis and intensity, and on the idea of the vortex end of the most components of the structure style, draw the particular assembly drawings and also the necessary drawing.
Brigthway can provide you the professional solids control equipment and drilling fluids system.
The solid control system also has some horizontal vacuum degasser equipped, its working principle is to use vacuum suction fluid, separated by the thin film after turbulent gas pumped by the vacuum pump. However, this horizontal vacuum degasser need to reprovision a pump spray unit, so that the degassed fluid pumped from the vacuum processing chamber.
Vacuum Degasser installation
(1) Drilling site requirements as long as no obvious tilt can be.
(2) inlet and outlet pipes, vacuum pumping line connections should be sealed and reliable.
(3) before the start of inlet and outlet pipes should end while immersed in the drilling fluid.
(4) Before the start of the first inlet hose on the vacuum pump and water pipe connected, stop for 3-5 minutes, and so filled with water after the pump is started again. At the same time, turn on the gas-water separator plugs, to the gas-water separator was filled with water until the water overflows from the overflow port stop and spin on the plugs. Start should check the motor rotation direction is correct.
(5) Vacuum control valve on the adjusting screw in place has been adjusted at the factory, do not casually adjusted.
Vacuum Degasser maintenance
(1) Vacuum degasser mud tank cover should be cleaned once a week, in order to avoid clogged gas channel.
(2) After use, the rotor should be washed and vacuum tank suction pipe, cut off the power, remove as the hole blocking plate to check parts for damage, and remove foreign objects inside the tank, rinse the tank wall and the rotor.
(3) After each using, the cleaning work should be carried out to ensure the re-use deaerator with good performance.
(4) Operating ambient temperature higher than 300C, the always see vacuum gauge, when the vacuum is less than 0.3 KPa, the water temperature should be maintained within the vacuum pump does not exceed 450C.
(5) For winter using, to promptly release the gas-water separator and pump the water to prevent cracking.
(6) Every month, available to the spindle bearing grease gun filled with sodium based grease filling volume 200ml.
Solid control system consists of a set of storage tanks and drilling fluid solids control drilling fluid used to remove harmful solid phase composed of a group of devices, storage tanks and solid control of drilling fluid circulation tank with reserve tank is divided into two parts. Ground drilling fluid circulating tank as part of a cycle, the tank surface mounted shaker, vacuum degasser, desander desilter, centrifuges and other equipment for the purification of fluids. Reserve tank is based on the need for preparation of drilling conditions different properties of the drilling fluid, or storage may be used for different drilling conditions of the drilling fluid.
Drilling fluid purification process in the system
1, First purification
Ie mud treatment at the shaker. Preparation of a good drilling fluid under the action of the pump into the bottom of the well, and carry drilling cuttings back to the surface through the wellhead elevated tube into the mud shaker, the drilling fluid screening out large debris.
2, Second purification
When drilling a gas dip when, through the role of the vacuum degasser will purge gas drilling fluid, thereby restoring the fluid density, fluid viscosity stable.
3, third purification
Two purified fluid supply pump enters through desander Desander, drilling fluid 40 - 60μm or more tiny harmful solid phase is separated desander li.
4, Fourth purification
Three purified by drilling into the supply pump desilter , drilling fluid 15 - 40μm above the tiny harmful solid phase desilter li be isolated.
5, Fifth purification
Four purified by centrifuge feed pump drilling fluid into the centrifuge, the centrifuge will be drilling in 5 - 15μm tiny particles separated.
The Liner shaker motor using two two separately driven eccentric shaft , in order to obtain a straight line shapes . Avoid the use of high-precision gear rotor forced the two excitation linking practices , so that the structure is greatly simplified.
In the ideal case ,such as the system of two identical motor characteristics , the fulcrum of the stiffness and damping are equal, nor phase exists at startup , two eccentric block synchronization reversal, can achieve linear vibration type . But in fact, because the two are not identical , and start the motor characteristics and other reasons , the two eccentric operation , it is not strictly maintain the relative position shown in Figure 2-9 , when the two eccentric centrifugal force can not be generated by Figure 2-9 superposition manner and offset to produce an unbalanced force , so that the whole screen box spring on the support movement and generate additional swing. It is due to this move and swing. Also the two eccentric automatically follow each other until they reach reverse synchronous rotation . This process is called self- synchronization process.
The shale shaker is a important equipment in the solid control equipment.Because two asynchronous motor for rotating the normal synchronization process, a sudden stop a willfully motor power.this motor sometimes can not stop turning , it is still a long term with negative 2-axis synchronous rotation . Then sieve pinch inevitable swing , is no longer a stable linear vibration . This is because a q mJ power from the motor shaft , which can be obtained during the vibration part of the energy to overcome the friction torque shaft , but its speed - fixed somewhat reduced, which necessarily and m: between emergence phase angle A. , The question arose AF force . So, still get to follow the surface of the long-term autocorrelation synchronous rotation . If the motor after a power failure during vibration energy can not be obtained in overcoming the friction torque shaft , the motor will slow down gradually . And stops rotating .
Brightway Design, installation location away from the mud shaker centroid distance, its main purpose is to make the sieve on the swing axis moment of inertia is small, that is to take reduced, Increasing j. Measures to improve the running stability.
