Novel plunger pump hydraulic end assembly structure

Abstract

The invention discloses a novel plunger pump hydraulic end assembly structure. The novel plunger pump hydraulic end assembly structure comprises a valve box structure assembly, a suction gland and a suction pressure cover; the suction gland is connected with the suction pressure cover; the suction gland is connected with the valve box structure assembly through a suction disc root seal assembly; the beneficial effects are that the sealing way of an O-shaped ring or a D-shaped sealing ring in the prior art is replaced by the suction disc root seal assembly between the suction gland and the valve box; a slot for filling the O-shaped ring or D-shaped ring does not need to be formed in processing of the suction gland and the valve box; good sealing performance is realized; under the premise ofhigh-pressure, large-output and continuous work condition operation at present, in actual use of the hydraulic end assembly, compared with the O-shaped ring or D-shaped ring, the suction disc root seal assembly realizes sealing of the suction gland to better satisfy the sealing requirements of more and more high-pressure and fluid scouring at present; the abrasion of the suction gland or / and valve box can also be reduced; and the service life of the suction gland or / and the valve box can be effectively prolonged as well.

Description

technical field [0001] The invention relates to the technical field of plunger pumps, in particular to a novel hydraulic end assembly structure of a plunger pump. Background technique [0002] Hydraulic pressure is the most important technology in the process of oil and gas field exploitation. The most critical equipment to realize this technology is the plunger pump, that is, the fracturing base fluid is pressurized by the plunger pump, and the fracturing base fluid is pumped underground to achieve the predetermined depth. The fracturing of the formation, so as to exploit the shale gas in the formation. The actual pressure value that the fracturing base fluid can achieve determines the depth of oil and gas well production, or whether a formation at a predetermined depth can be fractured. [0003] At present, the current situation of oil and gas field exploitation is developing towards deeper and deeper wells. In this industry, those reaching a certain depth are called deep...

AI Technical Summary

Problems solved by technology

[0005] The suction end of the conventional liquid end assembly is usually processed with a sealing groove on the suction gland or a sealing groove on the valve box, and is sealed with 1 or 2 O-rings or D-rings. The ring or D-ring is made of NBR material, and its sealing principle is to squeeze and deform the sealing ring through high pressure, and then fill the gap to achieve sealing; however, when operating under high pressure and large displacement, the sealing The ring will be continuously deformed and then restored, which will cause dents on the contact surface of the valve box or the suction gland and the O-ring or D-shaped sealing ring, resulting in the failure of the seal between the suction gland and the valve box. In severe cases, the high-pressure fluid will form hydraulic cutting, cutting the valve box, causing the valve box to be scrapped, which not only greatly reduces the service life of the hydraulic end valve box, but also creates a great safety hazard

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