Novel drilling mud pump

Abstract

The present invention discloses a novel drilling mud pump which is a five-cylinder single-acting piston pump, comprising: a base; and a power end assembly, a hydraulic end assembly, a lubricating system and a spraying system that are mounted on the base; the power end assembly is in transmission connection with the hydraulic end assembly; the lubricating system is a forced lubricating system for a lubricating pump set; the spraying system is used for cooling a piston in a cylinder sleeve. The novel drilling mud pump is large in displacement, small in size, light in weight, compact in structure and reliable in operation and is convenient to assemble and disassemble; the traditional three-cylinder mode is replaced with a five-cylinder mode, liquid flow pulsation rate is decreased, and displacement is increased; a transmission scheme of an alternating-current variable frequency motor with a gear reducer box is used in connection with alternating-current variable frequency technology, transmission efficiency is improved, and pump efficiency is given to full play; a hydraulic end pump head is of split structure, reducing the usage and maintenance cost of the pump; a power end linkage is of sliding bearing structure, reducing the size of the pump and reducing its weight.

Description

technical field [0001] The invention relates to the field of oil drilling and production equipment, in particular to a drilling mud pump for oil and natural gas development. Background technique [0002] In the drilling industry, the drilling mud pump is known as the "heart" of the drilling rig. It mainly plays the role of cooling the drill bit, pumping high-pressure drilling fluid, removing cuttings from the bottom of the well, dealing with complex downhole conditions and controlling pressure. The performance of the drilling mud pump is good. Deterioration has a direct impact on drilling rates and costs. With the development of oil and natural gas exploitation, the drilling depth continues to deepen, and the traditional mud pump has become a bottleneck restricting the development of drilling equipment. The traditional mud pump mainly has the following disadvantages: 1. The number of cylinders is small. The traditional mud pump is mainly three cylinders. The phase differenc...

AI Technical Summary

Problems solved by technology

The traditional mud pump mainly has the following disadvantages: 1. The number of cylinders is small. The traditional mud pump is mainly three cylinders. The phase difference of the mud pump in this structure is 120°, and the displacement fluctuates greatly. Poor, in order to enhance the rigidity and strength, the diameter of the crankshaft needs to be increased, resulting in an increase in the weight and volume of the mud pump

2. The transmission mode is unreasonable. The traditional mud pump mainly uses the motor to drive the gear shaft through the intermediate transmission mode. The small gear of the gear shaft meshes with the large gear of the crankshaft to transmit the power to the crankshaft. The transmission chain is long and the mechanical loss is large, which reduces the transmission efficiency and work. reliability, while increasing the volume and weight of the pump, it is not easy to move quickly, and it is difficult to adapt to offshore drilling platforms and other occasions with special requirements for floor space

Images