CN206592271U - A kind of rod-type pumping unit suitable for sanding formation - Google Patents

Abstract

The utility model provides a rod type oil well pump suitable for sand producing formations, which relates to the research field of oil production tools. A rod-type oil well pump suitable for sand producing formations described in the utility model includes an oil pipe anchor, a sucker rod, an oil pipe, a piston, a floating valve, a work cylinder, a fixed valve, and a sand retaining cover. The lower end of the sucker rod is provided with a piston, and the lower part of the piston is provided with a traveling valve. The piston and the traveling valve extend into the working cylinder. The lower end of the working cylinder is provided with a fixed valve. The lower part of the working cylinder is provided with an oil pipe anchor, and the working cylinder is fixed in the oil pipe through the oil pipe anchor. The lower part of the fixed valve is provided with a sand shield to prevent broken rock particles from entering the working cylinder. The utility model can block the broken rock particles in the formation outside the sand-blocking cover, prevent the broken rock particles from entering the working cylinder, and reduce the wear and damage of the rock particles on the rod-type oil well pump. Use time to ensure the smooth progress of production.

Description

A Rod Type Oil Well Pump Applicable to Sand Production Formation

technical field

The utility model relates to the research field of oil production tools, in particular to a rod-type oil well pump suitable for sand production formations.

Background technique

The rod type oil well pump is a plunger type oil well pump driven by the up and down reciprocating movement of the sucker rod. Rod well pump has the characteristics of simple structure, strong adaptability, convenient maintenance and management, and long life. It is one of the most widely used mechanical oil recovery methods at home and abroad. After the whole rod pump is assembled on the ground, it is inserted into the oil pipe with the sucker rod string and fixed at the predetermined position, so it is also called "insertion pump". When lifting and lowering the pump, the oil pipe can not be lowered. Rod well pumps are easy to inspect and are suitable for oil wells with relatively deep pumping and low output.

Sand production is the phenomenon that during the production process of oil and gas wells, due to excessive production pressure difference and loose cementation of sandstone oil and gas layers, formation sand flows into the wellbore, blocking oil and gas channels, and causing oil and gas wells to stop production. Weakly cemented sandstone formations or glutenite formations have low strength and are prone to sand production during oil well production. Such formations are called sand production formations. The broken rock particles produced by the sand-producing formation enter the rod pump along with the oil flow, causing wear on the piston and working cylinder, resulting in reduced pump efficiency and damage to the rod pump.

Utility model content

The purpose of this utility model is to provide a rod-type oil well pump suitable for sand-producing formations, which can prevent broken rock particles from weakly cemented formations from entering the rod-type oil-well pump, thereby reducing the wear and tear on the rod-type oil-well pump by rock particles and prolonging the life of the pump. The service life of the rod well pump ensures the smooth progress of oilfield production.

A rod-type oil well pump suitable for sand producing formations described in the utility model includes an oil pipe anchor, a sucker rod, an oil pipe, a piston, a floating valve, a work cylinder, a fixed valve, and a sand retaining cover.

The lower end of the sucker rod is provided with a piston, and the lower end of the piston is provided with a traveling valve.

The piston and the traveling valve extend into the working cylinder.

The lower end of the working cylinder is provided with a fixed valve.

The length of the working cylinder is 1.1 meters.

The lower part of the working cylinder is provided with an oil pipe anchor, and the working cylinder is fixed in the oil pipe through the oil pipe anchor.

The lower part of the fixed valve is provided with a sand shield to prevent broken rock particles from entering the working cylinder.

The sand shield is made of hard alloy steel.

The sand control cover is provided with an oil flow hole for crude oil to flow.

During the upstroke, the sucker rod drives the piston and the floating valve upward, the pressure in the working cylinder drops, and the floating valve closes. When the pressure in the working cylinder is lower than the inlet pressure of the fixed valve, the fixed valve opens and the liquid enters the working cylinder. During the downstroke, the sucker rod drives the piston and the floating valve downward, the pressure in the working cylinder rises, the floating valve opens, the fixed valve closes, and the liquid is discharged from the working cylinder to the oil pipe above the piston.

Features and advantages of the utility model are:

The utility model adopts the above technical scheme, so that when the rod type oil pump is working, the rock particles broken in the formation are blocked outside the sand shield and will not enter the working cylinder, reducing the wear and damage of the rock particles on the rod type oil pump, thereby Prolong the service life of the rod well pump and ensure the smooth progress of production.

Description of drawings

The following drawings are only intended to schematically illustrate and explain the utility model, and do not limit the scope of the utility model.

Fig. 1 is a rod type oil well pump suitable for sand production formation provided by the utility model.

In the figure: 1-oil pipe, 2-sucker rod, 3-piston, 4-moving valve, 5-work barrel, 6-fixed valve, 7-sand retaining cover, 8-oil pipe anchor.

detailed description

The specific embodiment of the utility model is illustrated below in conjunction with accompanying drawing. The utility model relates to a rod-type oil well pump suitable for sand producing formations, comprising an oil pipe 1, an oil sucker rod 2, a piston 3, a floating valve 4, a working cylinder 5, a fixed valve 6, a sand retaining cover 7, and an oil pipe anchor 8 .

The lower end of the sucker rod 2 is provided with a piston 3 , and the lower end of the piston 3 is provided with a traveling valve 4 .

The piston 3 and the floating valve 4 extend into the working cylinder 5 .

The lower end of the working cylinder 5 is provided with a fixed valve 6 .

The working cylinder 5 has a length of 1.1 meters.

The lower part of the working cylinder 5 is provided with an oil pipe anchor 8, and the working cylinder 5 is fixed in the oil pipe 1 through the oil pipe anchor 8.

The bottom of the fixed valve 6 is provided with a sand shield 7 to prevent broken rock particles from entering the working cylinder 5 .

Described sand control cover 7 has hard alloy steel to make.

The sand control cover 7 is provided with an oil flow hole for crude oil to flow.

During the upstroke, the sucker rod 2 drives the piston 3 and the floating valve 4 upward, the pressure in the working cylinder 5 drops, and the floating valve 4 closes. When the pressure in the working cylinder 5 is lower than the inlet pressure of the fixed valve 6, the fixed valve 6 opens , the liquid enters the working cylinder 5. During the downstroke, the sucker rod 2 drives the piston 3 and the floating valve 4 to go down, the pressure in the working cylinder 5 rises, the floating valve 4 opens, the fixed valve 6 closes, and the liquid is discharged from the working cylinder 5 to the oil pipe above the piston 3 1 in.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (3)

1. A rod-type oil well pump suitable for sand producing formations, comprising a tubing anchor, a sucker rod, a tubing, a piston, a floating valve, a work cylinder, a fixed valve, and a sand retaining cover, characterized in that the lower end of the sucker rod A piston is provided, and a traveling valve is provided at the lower end of the piston. The piston and the traveling valve extend into the working cylinder. The lower end of the working cylinder is provided with a fixed valve. The lower end of the working cylinder is provided with an oil pipe anchor. It is fixed in the oil pipe, and the lower part of the fixed valve is provided with a sand retaining cover. 2. A rod type oil well pump suitable for sand producing formations according to claim 1, characterized in that: the length of the working cylinder is 1.1 meters. 3. A rod type oil well pump suitable for sand producing formations according to claim 1, characterized in that: the sand retaining cover is made of hard alloy steel.