Mud Pump Parts

Mud Pump Fluid End

Mud Pump Fluid End Part Design Feature

Mud pump fluid end assembly mainly consists of suction cylinder, discharge cylinder, liner, piston, valve assembly (input and output), suction pipe, discharge pipe, air pulsation dampener, safety valve and spraying device etc. All sealing parts are tightened, featuring good sealing performance. Vertical fluid end features good suction performance. Mud pump fluid end parts are interchangeable with abroad brands, such as EMSCO, IDECO, OILWELL, GARDNER DENVOR, NATIONAL, SKYTOP, OPI, WIRTH, WILSON, GASO, HEX, DRILLMEC, etc. pump parts.

Mud Pump Fluid End

Fluid end is made of forged alloy steel and three fluid ends of each pump are interchangeable. On customers' request, the fluid end surface can be nickel-plated to improve the abrasion resistance. Shear relief valve and discharge strainer are fitted at the discharge outlet.

Fluid end mainly consists of suction cylinder, discharge cylinder, liner, piston, valve assembly (input and output), suction pipe, discharge pipe, air pulsation dampener, safety valve and spraying device etc.

Valve Assembly

The suction valve and discharge valve of F-series mud pump are interchangeable. F-500 mud pump uses API 5# valve, F-800/1000 mud pumps use API 6# valve. F-1300/1600/1600HL mud pumps use API 7# valve. D-2200/2200HL mud pumps use API 8# valve.

 NOTE: When the working pressure of F-1600HL and D2200HL mud pumps exceeds 34.5MPa (5000Psi), special high-pressure valve assembly should be used.

Liner

Bi-metal liner can be used. The sleeve of liner is made of wear-resisting cast iron. The liner surface hardness can reach HRC60-65. Therefore, liners are wear resistant and corrosion resistant.

Piston and Piston Rod

Piston and piston rod are of slide fit and sealed with rubber seal rings. They are fastened with lock nuts to prevent the piston from loosing. Fluid end, liner, piston, valve and seat, valve spring, seal ring and gasket, valve cover and cylinder head fluid end assembly for F-800 and F-1000 mud pumps are interchangeable. Fluid end assemblies of F-1300 and F-1600 mud pump are selfsame.

Mud Pump Power End

Mud Pump Power end

The power end is composed of frame assembly, pinion shaft assembly, crankshaft assembly, crosshead assembly etc.

Frame assembly

Frame assembly includes frame, back cover, substructure, little crane etc. Steel plates are welded to be box housing of main frame. After relief treatment of stress and rough and finish machining, the frame parts are formed. Main frame is the basic part of drilling pump. All parts of drilling pump are installed on it. Oil sump and lubrication oil pipeline are equipped inside the main frame to supply lubrication oil for gear, bearing, crosshead etc. A small crane with capacity of 500 kg is installed on main frame for lifting liner.

Pinion shaft assembly

The pinion is herringbone gear. Support bearing is RSTO (radial rolling bearing), which is very easy to assemble and disassemble for service. The extensions of the two shaft ends are the same, and power can be input from any end or both ends together in the same way.

Crankshaft assembly

Crankshaft assembly consists of crankshaft, big gear rim, connecting rod, crankshaft bearing and link bar bearing etc. They are installed on main frame through self-aligning roller bearing. Crankshaft is an integral cast eccentric shaft. 3 cranks share out 120 degrees equally. Left and right inclined (bevel) gear rings are integrated to be herringbone gear rim, which is installed on crankshaft. 3 connecting rod big end bearings are single row short cylindrical roller bearings installed respectively at three eccentric cranks of elbows shaft. Connecting rod small end is installed on crosshead pin through double row long cylindrical roller bearing.

Crosshead assembly

Crosshead assembly consists of crosshead, guide plate, crosshead pin and intermediate tie rod（intermediate rod）etc. Upper and lower guide plates are assembled on main frame and guide plate holes are formed; through crosshead pins, crosshead is driven by connecting rod to do reciprocating motion inside guide plate hole; then intermediate tie rod installed on crosshead is connected to piston rod and drive piston to do reciprocating motion.