CN201236785Y - Inverse L-shaped fluid end for high-pressure reciprocating pump - Google Patents

Abstract

A reverse "L" type hydraulic end for high-pressure reciprocating pumps, mainly composed of a suction valve, a liquid cylinder, a discharge pipe, a discharge valve, and a suction pipe; the suction valve and the suction pipe are close to the side of the cylinder sleeve of the piston; The outermost side of the cylinder is close to the discharge pipe, and the discharge valve and the suction valve are installed in the same pump head so that the fluid passage in the cylinder is in reverse "L" shape. The effect of the reverse "L" type fluid end structure is obviously better than that of the background technology. Its weight is more than 30% lighter than that of the "L" shaped fluid end. Suction performance is comparable to an upright "I" cylinder. The number of seals and connecting bolts and nuts is reduced, the assembly is easy, and the work is more reliable.

Description

A reverse "L" type fluid end for a high pressure reciprocating pump

technical field

The utility model belongs to the field of reciprocating pumps for oil and gas operations.

Background technique

At present, all high-pressure drilling pumps use the "L" type fluid end (see Figure 1). The "L" type liquid end used on the high pressure drilling pump has the following disadvantages:

1. The suction valve is far away from the piston cylinder liner, and the suction flow path is long, resulting in poor suction performance.

2. The hydraulic cylinder is a split structure, and the overall weight and volume of the hydraulic cylinder are relatively large.

3. The two hydraulic cylinders are connected by bolts, which is troublesome and time-consuming to disassemble.

Contents of the invention

The purpose of the utility model is to provide a reverse "L" type hydraulic end for reciprocating pumps, which is suitable for various reciprocating pumps, especially for high-pressure reciprocating pumps, and achieves high suction efficiency, simple and compact structure, and light weight.

The technical scheme of the utility model: a reverse "L" type hydraulic end for a high-pressure reciprocating pump, mainly composed of a suction valve, a liquid cylinder, a discharge pipe, a discharge valve, and a suction pipe; the suction valve and the suction pipe are close to the piston cylinder sleeve Side; the discharge valve is located at the outermost side of the cylinder and close to the discharge pipe, and the discharge valve and suction valve are installed in the same pump head so that the fluid channel in the cylinder is reversed "L" shape.

The hydraulic cylinder is a monolithic structure, and there are no joints and seals between the hydraulic cylinders, which is easy to assemble and reliable in operation.

The utility model has the advantage that compared with the background technology, the weight of the "L"-shaped fluid end is lighter than that of the "L"-shaped fluid end by more than 30%. Suction performance is comparable to an upright "I" cylinder. The number of seals and connecting bolts and nuts is reduced, the assembly is easy, and the work is more reliable.

Description of drawings:

Figure 1 is a schematic diagram of the structure of the background technology.

Fig. 2 is a structural schematic diagram of the utility model.

Detailed ways

The utility model is an anti-"L" type hydraulic end for reciprocating pumps. Its structural diagram is shown in Figure 2. It is mainly composed of a suction valve 1, an integral liquid cylinder 2, a discharge pipe 3, a discharge valve 4, Suction pipe 5 etc. are formed. The suction valve 1 and the suction pipe 5 are close to the side of the piston cylinder liner, the suction flow path is short and straight, and the suction efficiency is equivalent to the structure of the vertical hydraulic cylinder ("I"); the discharge valve 4 is located on the outermost side of the hydraulic cylinder, and the discharge pipe 3 Close to each other, the discharge channel is short, there are few turns, and the hydraulic loss and impact are reduced; the hydraulic cylinder 2 is a monolithic structure, and there are no joints and seals between the hydraulic cylinders, which is easy to assemble and reliable to work. The discharge valve 4 is installed in the same pump head as the suction valve 1. The flow channel in the hydraulic cylinder is reverse "L" type.

Claims (2)

1. A reverse "L" type fluid end for a high pressure reciprocating pump, mainly composed of a suction valve (1), a liquid cylinder (2), a discharge pipe (3), a discharge valve (4), and a suction pipe (5) ; It is characterized in that the suction valve (1) and the suction pipe (5) are close to the side of the piston cylinder sleeve; the discharge valve (4) is located at the outermost side of the hydraulic cylinder (2) and is close to the discharge pipe (3), and the discharge valve (4) It is installed in the same pump head as the suction valve (1) so that the fluid channel in the liquid cylinder (2) is in reverse "L" shape. 2. The reverse "L" type hydraulic end for high-pressure reciprocating pumps according to claim 1, characterized in that the hydraulic cylinder (2) is a monolithic integral structure.

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