Mud Pump Components and Spare Parts Drilling process
Mud pump is in the drilling process, to the drilling of mud or water and other washing fluid machinery. Mud pumps are an important part of drilling machinery and equipment.
Its main role is to drill in the process of drilling with the drill bit into the downhole, play a cooling bit, cleaning the drill, fixed the wall, driving drilling, and drilling back to the ground after the role of cuttings. In the commonly used circular drilling, the mud pump is the surface of the rinse medium - water, mud or polymer rinse liquid under a certain pressure, through the high pressure hose, faucet and drill rod center hole directly to the bottom of the drill to achieve Cooling the drill bit, the cutting down the cuttings and transport to the surface of the purpose. Commonly used mud pump is piston or plunger type, driven by the power machine crankshaft crankshaft crankshaft through the cross head and then drive the piston or plunger in the pump cylinder to do reciprocating motion. In the inhalation and discharge valve under the alternating effect, to achieve the purpose of pressure and circulation rinse solution.
In a typical mud pump fitting, the power always increases as the flow rate increases, that is, the power curve is a curve that increases with increasing flow, which poses a problem with the pump: In the design of the operating point of operation, in general, the pump power is less than the motor rated power, the use of this pump is safe; but when the pump head down, the flow will increase (from the pump performance curve can be seen) , Power also increases.
When the flow rate exceeds the design flow point and reaches a certain value, the pump input power may exceed the motor rated power caused by motor overload and burned. When the motor is overloaded, either protect the system from rotating the pump; either protect the system from malfunctioning.
The pump head is lower than the design point of the use of the situation, in practice, often encountered, one situation is in the pump selection, the pump head is too high, and the actual use of the pump is to reduce the lift The other is that the pump operating point is not well determined in use, in other words the pump flow needs to be adjusted frequently; there is also a case where the pump needs to be changed frequently. These three cases may cause the pump to overload and affect the reliability of the pump. It can be said that for the absence of full lift characteristics of the pump (including submersible sewage pump), its use will be subject to a large extent.
The so-called full lift characteristics (also known as no overload characteristics) refers to the power curve increases with the flow rate is very slow, more ideal is when the flow increases to a certain value, the power will not rise, but will be Down, that is, the power curve is a hump curve, if so, we just choose the motor rated power slightly over the hump point power value, then the flow of 0 to the maximum flow of the entire range, Operating conditions, the pump power will not exceed the motor power and make the pump overload, for this performance of the pump, whether it is selected or used, it will be very convenient and reliable. In addition the motor power does not need to be too large, you can save considerable equipment costs.