CN202866770U - Variable diameter sealing barrel oil pump with spring as supporting body - Google Patents

Abstract

A variable-diameter sealed oil extraction pump using a spring as a carrier, including a lifting mechanism and a variable-diameter seal, characterized in that the variable-diameter seal is provided with a rubber cylinder and a spring, and the upper end of the rubber cylinder is fixed on the sealing plate through a rubber pressure plate; The spring is coaxially placed in the rubber tube, the upper end of the spring is fixed on the rubber pressure plate through the spring upper pressure plate, and the lower end of the spring is fixed on the lifting plate through the spring lower pressure plate; a pull rod is connected to the lifting plate, and the pull rod passes through the spring lower pressure plate, The central hole of the spring upper pressing plate, the rubber pressing plate and the sealing plate is connected with the garbage lifting mechanism, and the pull rod is sealed and slidingly matched with the shaft sleeve in the central hole of the sealing plate; the utility model utilizes the lifting mechanism to compress the spring, and the spring is There will be no circumferential movement at both ends, and the radial expansion of the spring will drive the radial expansion of the rubber tube to cooperate with the inner surface of the tubing to achieve sealing during lifting. The structure is simple, easy to drive, there is no problem of expansion fluid leakage, and the service life is long.

Description

Variable-diameter sealed oil picker using spring as carrier

technical field

The utility model relates to an oil fishing tool in an oil field, in particular to a variable-diameter sealed oil extraction pump using a spring as a bearing body.

Background technique

In oilfield production, there are some oil-bearing blocks with low reserve abundance, low permeability, and low output. In order to reduce operating costs and improve benefits, the fishing oil production technology has been popularized and applied. When harvesting, use the oil pump to lift the oil upwards. In order to avoid the oil from leaking downwards, the existing oil pumps use radially expandable rubber tubes to realize the gap between the oil pipe and the inner wall of the oil pipe. There are solid and hollow rubber tubes. When the solid is deformed, it needs to apply a large force and it is difficult to drive. The hollow one is filled with expansion fluid inside to facilitate the transmission of force and is easy to drive. However, the expansion fluid is easy to leak after a period of use. Maintenance and replacement is time-consuming and laborious, which affects the production process and needs to be improved.

Utility model content

In order to solve the above-mentioned problems, the utility model provides a variable-diameter sealed oil extractor using a spring as a carrier.

The technical solution adopted by the utility model is: a variable-diameter sealed oil extraction pump using a spring as a carrier, including a lifting mechanism and a variable-diameter seal, which is characterized in that the variable-diameter seal is provided with a rubber tube and a spring, and the upper end of the rubber tube It is fixed on the sealing plate through the rubber pressure plate; the spring is coaxially placed in the rubber cylinder, the upper end of the spring is fixed on the rubber pressure plate through the spring upper pressure plate, and the lower end of the spring is fixed on the lifting plate through the spring lower pressure plate; the lifting plate is connected with The pull rod passes through the center hole of the spring lower pressure plate, spring upper pressure plate, rubber pressure plate, and sealing plate to connect with the garbage lifting mechanism, and the pull rod is sealed and slidingly matched with the shaft sleeve in the center hole of the sealing plate; the spring upper pressure plate is fixedly connected with a guide Post, the guide post passes through the spring lower pressing plate and the lifting plate downwards and cooperates with the guide sleeve on the spring lower pressing plate or the lifting plate.

The inner surface of the rubber cylinder is provided with warp and weft cloth woven with elastic threads.

The outer surface of the rubber cylinder is a cylindrical surface, and the inner surface is a tapered surface that gradually decreases in diameter upwards. The spring cooperates with the inner conical surface of the rubber cylinder to form a cone shape as a whole.

The utility model utilizes the lifting mechanism to compress the spring. Since the two ends of the spring will not move in the circumferential direction under the action of the guide rod, the spring will expand radially to drive the radial expansion of the rubber tube and cooperate with the inner surface of the oil pipe to realize the sealing when lifting. The structure is simple, easy to drive, there is no problem of expansion fluid leakage, and the service life is long.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the utility model.

Label name in the figure: 1 rubber tube; 2 spring; 3 warp and weft cloth; 4 rubber pressing plate; 5 sealing plate; 6 spring upper pressing plate; 7 pull rod;

Detailed ways

The embodiment of the utility model is shown in Figure 1. The variable-diameter seal oil extraction pump using the spring as the carrier is provided with a lifting mechanism and a variable-diameter seal. The variable-diameter seal is provided with a rubber cylinder 1 and a spring 2. The upper end of the rubber cylinder passes through the The rubber pressing plate 4 is fixed on the sealing plate 5; the spring 2 is coaxially placed in the rubber cylinder 1, the upper end of the spring 2 is fixed on the rubber pressing plate 4 through the spring upper pressing plate 6, and the lower end of the spring 2 is fixed on the lifting plate through the spring lower pressing plate 10 9; the lifting plate 9 is fixedly connected with a pull rod 7, the pull rod 7 passes through the spring lower pressure plate 10, the spring upper pressure plate 6, the rubber pressure plate 4, and the central hole of the sealing plate 5 is connected with the garbage lifting mechanism, and the pull rod 7 is connected with the sealing plate 5 The shaft sleeve in the center hole of the spring is sealed and slidingly fitted; the spring upper pressure plate 6 is fixedly connected with a guide post 8, and the guide post 8 passes downward through the spring lower pressure plate 10 and the lifting plate 9 and is connected with the spring lower pressure plate 10 or the lifting plate 9 Cooperate with the guide sleeve on the top to prevent the spring from rotating in the relative circumferential direction; the inner surface of the rubber cylinder 1 is provided with warp and weft cloth 3 woven with elastic threads, which can make the structure of the rubber cylinder more stable and durable; when in use, use the lifting mechanism to compress the spring. Under the action of the rod, the two ends of the spring will not move in the circumferential direction, and the spring will expand radially to drive the rubber tube to expand radially and cooperate with the inner surface of the tubing to achieve sealing during lifting. The structure is simple, easy to drive, and there is no problem of expansion fluid leakage. long life.

When the utility model is implemented, the outer surface of the rubber cylinder 1 can be a cylindrical surface, and the inner surface is a conical surface gradually shrinking upwards. The spring 2 cooperates with the inner conical surface of the rubber cylinder 1 to form a cone shape. When pulling, the rubber cylinder 1 can be pulled. to a larger expansion.

Claims (3)

1. A variable-diameter sealed oil extraction pump using a spring as a carrier, including a lifting mechanism and a variable-diameter seal, characterized in that the variable-diameter seal is provided with a rubber tube (1) and a spring (2), and the upper end of the rubber tube passes through The rubber pressure plate (4) is fixed on the sealing plate (5); the spring (2) is coaxially placed in the rubber cylinder (1), and the upper end of the spring (2) is fixed on the rubber pressure plate (4) through the spring upper pressure plate (6) , the lower end of the spring (2) is fixed on the lifting plate (9) through the spring lower pressure plate (10); the lifting plate (9) is connected with a pull rod (7), and the pull rod (7) passes through the spring lower pressure plate (10), The central hole of the spring upper pressure plate (6), rubber pressure plate (4) and sealing plate (5) is connected with the garbage lifting mechanism, and the pull rod (7) is in sealing sliding fit with the shaft sleeve in the central hole of the sealing plate (5); The pressure plate (6) is fixedly connected with a guide post (8), and the guide post (8) passes through the spring lower pressure plate (10) and the lifting plate (9) and is connected with the spring lower pressure plate (10) or the lifting plate (9) ) on the guide sleeve fit. 2. The variable-diameter sealed oil extractor using a spring as a carrier according to claim 1, characterized in that the inner surface of the rubber cylinder (1) is provided with warp and weft cloth (3) woven with elastic threads. 3. The variable-diameter sealed oil extractor using a spring as a carrier according to claim 1, characterized in that the outer surface of the rubber tube (1) is a cylindrical surface, and the inner surface is a tapered surface that gradually shrinks upward. The spring (2) cooperates with the inner conical surface of the rubber tube (1) to form a conical shape as a whole.

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