CN104806511B - Spring type spoiler of long-stroke fracturing pump - Google Patents

Abstract

The invention relates to a spring type spoiler of a long-stroke fracturing pump. The spring type spoiler can be used for playing a role in spoiling fracturing fluid and lowering the deposition of solid-phase particles in the fracturing fluid. The technical scheme is as follows: a spring is a cylindrical helical spring with rectangular cross section, the width of the rectangular cross section of the spring along the radial direction of the spring is 4-10 times that of the rectangular cross section of the spring along the axial direction of the spring, and elliptical gaps are formed in the lower ends, close to the external cylindrical surface of the spring, at a mounted position of the spring; the spring is arranged in a pump cylinder, one end of the spring is connected to a valve box by a bolt, and the other end of the spring is connected to the end part of a plunger by a bolt.

Description

A spring-type spoiler for a long-stroke fracturing pump

technical field

The invention relates to a spoiler for a long-stroke fracturing pump.

Background technique

In well completion operations, multi-stage fracturing of horizontal wells has become the main construction mode at present and in the future. In 2013, the total number of fracturing operations in China was about 40,000 well layers, and the construction operations in large and ultra-deep layers increased at a rate of 15% every year. A large number of oil and gas regions in my country are concentrated in hills and mountainous areas, and the construction roads, well site area and water supply are relatively limited. Vehicle-mounted fracturing equipment has become a necessary condition, and high-power equipment has become a preferred condition. Patent CN201310700277.0 discloses a high-power hydraulically driven fracturing pump system, which effectively reduces the number of fracturing crews, facilitates the arrangement of the crews at the well site and saves the transportation cost of the fleet. Patent CN201410138264.3 proposes a high-power hydraulically driven fracturing pump, which can greatly reduce the stroke times of the fracturing pump, thereby reducing the fatigue damage of the fracturing pump and increasing the service life of the fracturing pump.

The long-stroke hydraulic fracturing pump can realize high-power pumping of fracturing fluid by a single pump truck, greatly reducing the number of trucks on the well site, so it has broad application prospects. However, the fracturing fluid stays in the long-stroke pump cylinder for a long time and flows smoothly, and the solid particles in it are easy to settle and accumulate at the inlet of the pump cylinder.

Contents of the invention

Purpose of the present invention: In order to alleviate the problem of solid-phase particle deposition in the cylinder of the long-stroke fracturing pump, a spring-type spoiler for the long-stroke fracturing pump is provided.

For achieving the above object, the technical scheme that the present invention takes is:

A spring spoiler for a long-stroke fracturing pump, including a spring, characterized in that: the spring is a cylindrical coil spring with a rectangular cross-section, and the width of the rectangular cross-section along the radial direction of the spring is equal to the width along the axial direction of the spring 4 to 10 times the width, the spring is provided with an elliptical notch near the outer cylindrical surface of the spring at the lower end of the installation position; the spring is set in the pump cylinder, one end of the spring is connected to the valve box with bolts and the other end is connected to the plunger end with bolts department.

The beneficial effects of the present invention are: the spring spoiler of the long-stroke fracturing pump according to the present invention only includes one spring, has a simple structure, can disrupt the flow of the fracturing fluid, and reduces the pressure of the long-stroke pump cylinder. Solid phase particle deposition within.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

In the figure: 1. valve box; 2. flow hole; 3. spring; 4. pump cylinder; 5. plunger.

detailed description

The present invention is not limited by the following implementation examples, and specific implementation manners can be determined according to the technical solutions of the present invention and actual conditions. The present invention is described below in conjunction with FIG. 1 . The positional relationship of up, down, left, right, etc. is determined according to the layout direction of Figure 1 of the specification.

As shown in FIG. 1 , the valve box 1 and the pump cylinder 4 are connected by threads, the plunger 5 is arranged in the pump cylinder 4 , and the plunger 5 slides in the pump cylinder 4 . The spring 3 is a cylindrical helical spring with a rectangular section. The width of the rectangular section of the spring 3 along the radial direction of the spring 3 is 6 times the width along the axial direction of the spring 3. The lower end of the spring 3 at the installation position is close to the outer cylindrical surface of the spring 3. The part is provided with an oval notch. The spring 3 is arranged in the pump cylinder 4, and one end of the spring 3 is connected to the valve box 1 with a bolt, and the other end is connected to the end of the plunger 5 with a bolt.

Principle of the present invention is:

The pump cylinder 4 reserves a section of spare stroke for installing spoiler elements. The spring 3 is continuously stretched and compressed during the reciprocating motion of the plunger 5. When the fracturing fluid flows into the pump cylinder 4 or flows out of the pump cylinder 4 from the flow hole 2, it is disturbed by the obstruction of the spring 3, and the turbulence of the fracturing fluid increased mobility. Therefore, the solid phase particles in the fracturing fluid are not easy to deposit. In addition, the spring 3 is provided with an elliptical notch near the outer cylindrical surface of the spring 3 at the lower end of the installation position, so that once the solid phase particles are deposited, they can be discharged smoothly.

Claims (1)

1. a kind of spring flow spoiler of long stroke fracturing pump, including spring（3）, it is characterised in that：Spring（3）For square-section Cylindrically coiled spring, spring（3）Square-section along spring（3）The width of radial direction is it along spring（3）The width of axial direction 4 ~ 10 times, spring（3）In the lower end of installation site near spring（3）The position of external cylindrical surface arranges oval notch；Spring （3）It is arranged at pumping cylinder（4）It is interior, spring（3）One end is bolted to clack box（1）The upper other end is bolted to plunger（5） End.