CN215761535U

CN215761535U - Heat-preservation and heat-insulation hollow sucker rod for oil field

Info

Publication number: CN215761535U
Application number: CN202121987626.8U
Authority: CN
Inventors: 杨嘉博
Original assignee: Panjin Deying Petroleum Technology Service Co ltd
Current assignee: Panjin Deying Petroleum Technology Service Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-02-08
Anticipated expiration: 2031-08-23

Abstract

The utility model discloses a heat-preservation and heat-insulation hollow sucker rod for an oil field, belonging to the technical field of tubular oil-well pumps, comprising a sucker rod, wherein the sucker rod at the lowest part is positioned in an inner cavity of a pump barrel, and a plunger and a fixed valve are arranged in the inner cavity of the pump barrel, the utility model has the beneficial effects that: in the process of pumping oil, the temperature is lower and lower due to the ground temperature gradient (the oil pipe has no heat preservation and insulation), and hot water passes through the heat preservation and insulation hollow sucker rod and enters the oil pipe through the water heater of the heat preservation and insulation hollow sucker rod to be mixed with oil (stratum produced liquid), so that the oil temperature is improved, the dewaxing and condensation of crude oil are reduced, the smooth and efficient oil pumping is facilitated, the pipeline cannot be blocked, water flows in the pipeline, and the effect of heating the oil by the hot water can be effectively kept due to the heat preservation effect of the filler of the nano carbon fiber heat insulation elastomer, and the blockage of dewaxing and condensation of the oil in the pumping process is avoided.

Description

Heat-preservation and heat-insulation hollow sucker rod for oil field

Technical Field

The utility model relates to the technical field of tubular oil well pumps, in particular to a heat-preservation and heat-insulation hollow sucker rod for an oil field.

Background

The oil well pump is a downhole device driven by the oil pumping unit to lift crude oil in a well to the ground. The ordinary oil pump is mainly composed of pump barrel, suction valve, piston and discharge valve. According to the underground fixing mode of the oil well pump, the oil well pump can be divided into a tubular pump and a rod pump; the oil well pump is underground equipment for pumping oil; the pumped liquid contains sand, wax, water, gas and corrosive substances, and works under the well with the pressure of hundreds of meters to thousands of meters, and the pressure in the pump can reach more than 10 MPa; therefore, the working environment is complex, the conditions are severe, and the yield of the oil well is directly influenced by the working condition of the pump; therefore, the oil pump should generally satisfy the following requirements: the structure is simple, the strength is high, the quality is good, and the sealing of the connecting part is reliable; the manufactured material has good wear resistance and corrosion resistance and long service life; the specification type can meet the requirement of the oil well liquid discharge capacity, and the adaptability is strong; the lifting is convenient; the structure should consider sand control, gas prevention, and have necessary ancillary equipment; the tubular pump is also called oil pipe pump, and is characterized by that the external cylinder, bush and suction valve are assembled on the ground, and connected to the lower portion of oil pipe, and firstly placed in the well, then the piston with discharge valve is placed in the pump by means of sucker rod through the oil pipe; the piston is a hollow cylinder made of seamless steel pipes, the outer surface of the piston is smooth and provided with an annular groove, sand entering a gap between the piston and the pump cylinder is gathered in the groove, the piston and the pump cylinder are prevented from being abraded by the sand, and oil stored in the groove plays a role in lubricating the surface of the piston.

The pumping rod of the existing tubular oil pump is solid and has no underground water mixing and heat tracing, and in the oil pumping process, as the oil is pumped upwards to lower the ground temperature, the crude oil begins to dewax gradually and condense to cause difficulty in oil pumping, and the pipeline is easy to block.

Disclosure of Invention

The utility model provides a heat-preservation and heat-insulation hollow sucker rod for an oil field.

Therefore, the utility model aims to provide a heat-insulating hollow sucker rod for an oil field, which is characterized in that an inner steel pipe is sleeved in an outer steel pipe through a hollow sucker rod, and heat-insulating materials are filled in the outer steel pipe and the inner steel pipe, so that hot water is ensured to enter a downhole oil pipe from a well head for effective heat tracing, oil is prevented from being solidified into blocks in the process of pumping, and the problems that the sucker rod of the existing tubular oil well pump is solid and has no downhole water mixing heat tracing, and crude oil is gradually dewaxed and condensed to cause oil pumping difficulty and easily block a pipeline as the oil is pumped upwards to lower the ground temperature in the oil pumping process are solved.

To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:

a heat-insulating hollow sucker rod for oil fields comprises a sucker rod, wherein the sucker rod at the lowest part is positioned in an inner cavity of a pump barrel, a plunger and a fixed valve are arranged in the inner cavity of the pump barrel, the sucker rod comprises an outer steel pipe, an inner steel pipe and heat-insulating fillers, the inner steel pipe is sleeved in the inner cavity of the outer steel pipe, and hot water is injected into the inner cavity when the sucker rod is used; and the heat-insulation filler is arranged in a gap between the inner wall of the outer steel pipe and the outer wall of the inner steel pipe and is used for heat insulation.

As a preferred scheme of the heat preservation and insulation hollow sucker rod for the oil field, the utility model comprises the following steps: the fixed valve is located below the plunger.

As a preferred scheme of the heat preservation and insulation hollow sucker rod for the oil field, the utility model comprises the following steps: the heat-preservation filler is a nano carbon fiber heat-insulation elastomer.

As a preferred scheme of the heat preservation and insulation hollow sucker rod for the oil field, the utility model comprises the following steps: the outer diameter of the outer steel pipe is set to be 36 mm.

As a preferred scheme of the heat preservation and insulation hollow sucker rod for the oil field, the utility model comprises the following steps: the outer diameter of the inner steel pipe is set to be 15-25 mm.

As a preferred scheme of the heat preservation and insulation hollow sucker rod for the oil field, the utility model comprises the following steps: a male buckle is installed at one end of the sucker rod, and a female buckle is installed at the other end of the sucker rod.

As a preferred scheme of the heat preservation and insulation hollow sucker rod for the oil field, the utility model comprises the following steps: and the adjacent sucker rods are connected through the male buckle and the female buckle.

As a preferred scheme of the heat preservation and insulation hollow sucker rod for the oil field, the utility model comprises the following steps: and the bottom end of the lowermost sucker rod is fixedly connected with the plunger.

Compared with the prior art:

1. in the process that oil is pumped up, the temperature is lower and lower due to the ground temperature gradient (the oil pipe has no heat preservation and insulation), and hot water enters the oil pipe through the water heater at the bottom of the heat preservation and insulation hollow rod and is mixed with the oil (the stratum output liquid) through the heat preservation and insulation hollow rod, so that the oil temperature is improved, the dewaxing and condensation of crude oil are reduced, the smooth and efficient oil pumping is facilitated, and the pipeline cannot be blocked;

2. in the process that water flows in the pipeline, because of the heat preservation effect of the filler of the nano carbon fiber heat insulation elastomer, the water can not become cool, so that the effect of heating oil by hot water can be effectively kept, and the obstruction of dewaxing and condensation in the process of pumping the oil is avoided.

Drawings

FIG. 1 is a schematic structural view provided by the present invention;

FIG. 2 is a view of the present invention providing the connection of adjacent sucker rods;

FIG. 3 is a cross-sectional view of a sucker rod provided by the present invention;

FIG. 4 is a top view of the sucker rod provided by the present invention.

In the figure: the pump cylinder 1, the plunger 2, the fixed valve 3, the sucker rod 4, the outer steel tube 41, the male buckle 42, the female buckle 43, the filler 44 and the inner steel tube 45.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The utility model provides a heat-insulating hollow sucker rod for an oil field, which comprises a sucker rod 4, wherein the sucker rod 4 at the lowest part is positioned in an inner cavity of a pump barrel 1, a plunger 2 and a fixed valve 3 are arranged in the inner cavity of the pump barrel 1, the sucker rod 4 comprises an outer steel pipe 41, an inner steel pipe 45 and a heat-insulating filler 44, the inner steel pipe 45 is sleeved in the inner cavity of the outer steel pipe 41, and hot water is injected into the inner cavity when the sucker rod is used; the heat insulation filler 44 is arranged in a gap between the inner wall of the outer steel pipe 41 and the outer wall of the inner steel pipe 45 and used for heat insulation; the fixed valve 3 is used for providing a channel for the fluid in the well to flow to the pump cylinder; the pump cylinder 1 has the function of realizing conversion from mechanical energy to pressure energy, so that oil is pumped up by using pressure difference; hot water is injected into the inner cavity of the inner steel pipe 45, and the water does not become cold under the heat preservation 44 effect of the filler of the carbon nanofiber heat insulation elastomer, so that the effect of heating the oil by the hot water can be effectively kept, the thickening of the oil in the pumping process is avoided, and the smooth and efficient oil pumping is facilitated;

further, the fixed valve 3 is positioned below the plunger 2; the function of the fixed valve 3 is to provide a passage for well fluid to flow to the pump barrel.

Further, the heat insulation filler 44 is a nano carbon fiber heat insulation elastomer; the function of the heat-insulating filler 44 of the carbon nanofiber heat-insulating elastomer is to insulate the hot water in the inner steel pipe, so that the heat of the hot water is prevented from being dissipated outwards, and the heat-insulating effect of the hot water is lost.

Further, the outer diameter of the outer steel pipe 41 is set to be 36 mm.

Further, the outer diameter of the inner steel pipe 45 is set to 15-25mm, and the outer diameter of the inner steel pipe 45 is preferably set to 20 cm.

Further, a male buckle 42 is installed at one end of the sucker rod 4, and a female buckle 43 is installed at the other end of the sucker rod 4; thereby enabling the connection of adjacent sucker rod 4 diameters.

Further, the adjacent sucker rods 4 are connected through the male buckle 42 and the female buckle 43; thereby the sucker rod 4 can be disassembled and connected, and the assembly and the disassembly are convenient.

Further, the bottom end of the lowermost sucker rod 4 is fixedly connected with the plunger 2; the plunger 2 functions to transfer mechanical energy and provide a passage for fluid in the pump barrel to flow out of the pump barrel.

When the device is used specifically, a pump is put down, a pump cylinder of an oil well pump is connected with an upper oil pipe, and the oil well pump is put down to a designed depth along with a pipe column; the lower plunger 2, the oil pump plunger 2 and the sucker rod 4 are connected in a column way, and are put into the bottom of the pump barrel 1 along with the sucker rod 4, the anti-impact distance is adjusted as required, and hot water is injected into the inner cavity of the inner steel pipe 45 of the sucker rod 4; during the upstroke, the plunger 2 moves upwards, the traveling valve is closed, the fixed valve 3 is opened, the fluid in the well enters the pump barrel 1, and the fluid on the upper part of the plunger 2 is discharged out of the pump barrel 1; during the down stroke, the plunger 2 moves downwards, the internal volume of the pump barrel 1 is reduced, the pressure is increased, the fixed valve 3 is closed, the floating valve is opened, and the plunger 2 moves downwards to the original position to finish a pumping process; in the process of pumping the oil, the temperature is lower and lower due to the closer distance to the ground, but hot water comes out of the pump cylinder 1 and is mixed with the oil, so that the oil temperature is improved, and the oil is prevented from being condensed into blocks; and in the process that water flows in the pipeline, the water cannot become cold due to the heat preservation effect of the filler 44 of the nano carbon fiber heat insulation elastomer.

While the utility model has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the various features of the disclosed embodiments of the utility model may be used in any combination, provided that no structural conflict exists, and the combinations are not exhaustively described in this specification merely for the sake of brevity and resource conservation. Therefore, it is intended that the utility model not be limited to the particular embodiments disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a heat preservation hollow sucker rod that insulates against heat for oil field, includes sucker rod (4), the below sucker rod (4) are located the inner chamber of pump barrel (1), be equipped with plunger (2) and fixed valve (3), its characterized in that in the inner chamber of pump barrel (1): the sucker rod (4) comprises an outer steel pipe (41), an inner steel pipe (45) and a heat-insulating filler (44), the inner steel pipe (45) is sleeved in the inner cavity of the outer steel pipe (41), and hot water is injected into the inner cavity when the sucker rod is used; and the heat-insulating filler (44) is arranged in a gap between the inner wall of the outer steel pipe (41) and the outer wall of the inner steel pipe (45) and is used for heat insulation.

2. The insulated hollow sucker rod for oil field according to claim 1, characterized in that the fixed valve (3) is located below the plunger (2).

3. The insulated hollow sucker rod for oil field of claim 1, wherein the insulating filler (44) is a nano carbon fiber insulating elastomer.

4. The insulated hollow sucker rod for oil field according to claim 1, wherein the outer diameter of the outer steel pipe (41) is set to 36 mm.

5. The insulated hollow sucker rod for oil field according to claim 1, wherein the outer diameter of the inner steel pipe (45) is set to 15-25 mm.

6. The heat-preservation and heat-insulation hollow sucker rod for the oil field is characterized in that a male buckle (42) is installed at one end of the sucker rod (4), and a female buckle (43) is installed at the other end of the sucker rod (4).

7. The insulated hollow sucker rod for oil field according to claim 6, characterized in that the adjacent sucker rods (4) are connected by the male (42) and female (43) buttons.

8. The insulating hollow sucker rod for the oil field according to claim 1, characterized in that the bottom end of the lowermost sucker rod (4) is fixedly connected with the plunger (2).