Five-cylinder plunger pump with integral power end structure

Abstract

The invention discloses a five-cylinder plunger pump with an integral power end structure. According to the five-cylinder plunger pump, an integral welding structure is adopted for a crankshaft box body and a crosshead box body in a five-cylinder plunger pump power end assembly, so that the structural strength of the power end assembly is higher, the supporting stability is better, and the whole pump vibration can be reduced; the cylinder spacing is 13-14 inches, the bearing area of connecting rods, crossheads and bearing bushes is increased, a guarantee is provided for the output of the high-power of the five-cylinder plunger pump, the high-power five-cylinder plunger pump can effectively solve the problem that the shale gas fracturing well site area is narrow and the required fracturingequipment is relatively large, the use of equipment can be reduced, and the wellsite arrangement is facilitated; the 11-inches long-stroke design can better realize large-displacement operation requirements and improve the operation efficiency; and according to the multi-point supporting design of crankcase bodies, crosshead box bodies and the hydraulic end assembly, the supporting strength of thefive-cylinder plunger pump can be improved, the vibration is reduced, the high-load operation is better guaranteed, and the operation is more stable.

Description

Technical field [0001] The invention relates to the technical field of plunger pumps, and in particular to a five-cylinder plunger pump with an integral power end structure. Background technique [0002] With the further development of unconventional oil and gas and shale oil and gas, the requirements for pressure and displacement of fracturing operations are constantly increasing. Not only the operating pressure continues to increase with the increase of the depth of horizontal wells, but also the displacement required for a single-stage well The volume is getting higher and higher, which makes the scale of fracturing construction larger and larger. The harsh operating conditions also put higher requirements on fracturing equipment, especially plunger pumps. At present, in the shale oil and gas development process, the operating pressure generally reaches 80-90MPa or even higher, and the operating displacement of a single stage is generally 1800m 3 -2000m 3 Even above, th...

AI Technical Summary

Problems solved by technology

At present, the most widely used fracturing truck on the market is the 2500 fracturing truck, which is equipped with a 2800hp plunger pump. Other commonly used fracturing pump types include 2500hp pumps, 3300hp pumps, and 4000hp pumps. Taking the 2800hp pump as an example, due to power limitations , the single-pump displacement is low in high-pressure operation, and a single-stage displacement requirement is 14-16m 3 In a shale gas well site per minute, a total of nearly 20 fracturing trucks are required to operate at the same time to meet the total displacement requirements of the fracturing operation, which will occupy a large well site area and increase the narrow oil and gas field well site equipment Difficulties in layout. In addition, conventional plunger pumps are faced with increasingly harsh operating conditions, and they are in high-load operations for a long time. The frequency of problems is also increasing, which increases the cost of maintenance and repair.

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