An inlet type downhole hydraulic oil pump

Abstract

The present invention discloses a through-type downhole hydraulic oil pump, specifically relating to the field of oil pumps, including a lower sealing pipe. A tubing string is provided at the top of the lower sealing pipe, and the lower sealing pipe is disposed around the outside of the tubing string. A first delivery pipe is provided at the top of the tubing string. A first oil suction pipe is provided inside the lower sealing pipe, and the first oil suction pipe is communicated with the tubing string. A flow splitting assembly is provided at the bottom of the inner wall of the tubing string, and the flow splitting assembly includes a flow splitting cavity and a second delivery pipe. By providing the first oil suction pipe, the second oil suction pipe and the delivery cavity, two oil suction pipes at different positions can be respectively arranged at different heights of the whole downhole hydraulic oil pump to perform oil suction work respectively. The oil bodies after oil suction are respectively transported through the delivery cavity and the vertical rod, and the switching control of the oil bodies at different positions can be carried out at the part of the return cavity, so that the simultaneous oil suction and separate transportation at different heights can be realized, and the simultaneous oil suction operation of oil layers at different depths can be completed.

Description

Technical Field

[0001] The present invention relates to the technical field of oil pumps, and more specifically, to a through-type downhole hydraulic oil pump. Background Art

[0002] At present, the oil pumping devices in oil wells mainly consist of downhole oil pumps and surface beam pumping units. The surface beam pumping unit is connected to the plunger rod of the downhole oil pump through a sucker rod. During operation, the surface beam pumping unit drives the sucker rod to drive the plunger rod of the oil pump to reciprocate in the oil pump, lifting the liquid produced from the oil layer thousands of meters underground to the ground. During the oil pumping operation, the oil layer distribution of underground oil at different depths may also vary. Usually, after pumping at a set depth is completed, the equipment needs to be adjusted and then enter another depth for oil pumping. Such operations usually require a large amount of manpower and material resources. Therefore, it is necessary to invent a through-type downhole hydraulic oil pump. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a through-type downhole hydraulic oil pump.

[0004] To achieve the above object, the present invention provides the following technical solution: A through-type downhole hydraulic oil pump includes a lower sealing pipe. A suction pipe is provided at the top of the lower sealing pipe. The lower sealing pipe is disposed around the outside of the suction pipe. A first delivery pipe is provided at the top of the suction pipe. A first suction pipe is provided inside the lower sealing pipe. The first suction pipe is communicated with the suction pipe. A flow splitting assembly is provided at the bottom inner wall of the suction pipe. The flow splitting assembly includes a flow splitting chamber and a second delivery pipe. One end of the first suction pipe is matched with the flow splitting chamber. A second suction pipe is provided at the top of the flow splitting assembly. Both the first suction pipe and the second suction pipe include a first switching valve. A delivery chamber and a vertical rod are provided inside the first delivery pipe. A reflux chamber is provided at the top of the delivery chamber. The flow splitting assembly further includes a blocking block. The blocking block is fixedly provided inside the flow splitting assembly. A plurality of flow blocking plates are provided at the bottom of the blocking block. Oil through holes are evenly provided inside the flow blocking plates. A check valve is provided at one end of the second delivery pipe. An oil through groove is provided between the check valve and the flow splitting chamber. The oil through groove is provided outside the blocking block. The first switching valve of the first suction pipe is communicated with the flow splitting assembly. An empty groove is provided between the second delivery pipe and the second suction pipe. An oil delivery hose is provided inside the empty groove. The two ends of the oil delivery hose are respectively communicated with the second delivery pipe and the delivery chamber.

[0005] In a preferred embodiment, the suction pipe and the first delivery pipe are integrally provided. An upper oil suction port is provided inside the first delivery pipe. An upper valve cover is provided inside the upper oil suction port.

[0006] In a preferred embodiment, the first oil extraction pipe and the second oil extraction pipe further include an oil extraction chamber and a protective sleeve. An oil extraction pipe opening is communicatively provided outside the oil extraction chamber. The oil extraction pipe opening penetrates through the oil extraction chamber and extends to the outside of the lower sealing pipe. A protective sleeve is disposed around the outside of the oil extraction chamber. The first on-off valve is provided at the top of the oil extraction chamber.

[0007] In a preferred embodiment, the lower sealing pipe is fixedly connected to the oil extraction pipe. A positioning collar is disposed around the outside of the lower sealing pipe. The positioning collar is fixedly connected to the first oil extraction pipe.

[0008] In a preferred embodiment, a vertical rod is provided inside the conveying chamber. The vertical rod is hollow. One end of the bottom of the vertical rod is connected to the first on-off valve of the second oil extraction pipe.

[0009] In a preferred embodiment, the reflux chamber is provided with two connection ports. The two connection ports are respectively communicatively connected to the conveying chamber and the vertical rod, and electromagnetic valves are provided at the connection parts.

[0010] In a preferred embodiment, a second on-off valve is communicatively provided at the top of the reflux chamber. The second on-off valve is provided inside the first conveying pipe and is communicatively connected to the upper valve cover.

[0011] Technical effects and advantages of the present invention:

[0012] 1. By providing the first oil extraction pipe, the second oil extraction pipe, the conveying chamber and the reflux chamber, two oil extraction pipes at different heights in the whole downhole hydraulic oil pump can respectively carry out oil extraction work. After the oil is extracted, the oil bodies are respectively conveyed through the conveying chamber and the vertical rod, and the oil bodies at different positions can be switched and controlled at the reflux chamber part, so as to realize simultaneous oil extraction and separate conveyance at different heights and complete simultaneous oil extraction operations on oil layers at different depths.

[0013] 2. By providing the first oil extraction pipe, the lower sealing pipe and the flow dividing assembly, the flow dividing assembly near the bottom can divide and block the oil body pumped by the first oil extraction pipe during operation through the flow dividing chamber and the blocking block, and slowly convey it into the second conveying pipe under the action of pressure. And during the conveying process, the oil body is conveyed around the second oil extraction pipe at a higher position, which can ensure the balance of the pressure received from the outside to the inside as a whole, ensure the stability of the whole. The lower sealing pipe at the bottom can position and protect the whole bottom and the first oil extraction pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the structure of the first oil extraction pipe of the present invention.

[0016] Figure 3 Schematic structural diagram of the flow splitting component of the present invention.

[0017] Reference numerals: 1 lower sealing pipe, 11 positioning collar, 2 oil extraction pipe, 3 first delivery pipe, 31 upper oil extraction port, 32 upper valve cover, 4 first oil extraction pipe, 41 oil extraction chamber, 42 protective sleeve, 43 first switching valve, 5 flow splitting component, 51 flow splitting chamber, 52 blocking block, 53 flow blocking plate, 54 second delivery pipe, 55 check valve, 6 second oil extraction pipe, 7 delivery chamber, 71 vertical rod, 8 return chamber, 9 second switching valve. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] According to Figures 1-3 An inserted downhole hydraulic oil pump shown in the figure includes a lower sealing pipe 1. A first delivery pipe 3 is provided at the top of the lower sealing pipe 1. The lower sealing pipe 1 is disposed around the outside of the oil extraction pipe 2. A first oil extraction pipe 4 is provided inside the lower sealing pipe 1. The first oil extraction pipe 4 communicates with the oil extraction pipe 2. A flow splitting component 5 is provided at the bottom of the inner wall of the oil extraction pipe 2. The flow splitting component 5 includes a flow splitting chamber 51 and a second delivery pipe 54. One end of the first oil extraction pipe 4 is matched with the flow splitting chamber 51. A second oil extraction pipe 6 is provided at the top of the flow splitting component 5. Both the first oil extraction pipe 4 and the second oil extraction pipe 6 include a first switching valve 43. A delivery chamber 7 and a vertical rod 71 are provided inside the first delivery pipe 3. A return chamber 8 is provided at the top of the delivery chamber 7.

[0020] The oil extraction pipe 2 and the first delivery pipe 3 are integrally provided. An upper oil extraction port 31 is provided inside the first delivery pipe 3. An upper valve cover 32 is provided inside the upper oil extraction port 31. Due to the connection equipment on the installation bottom surface of the upper oil extraction port 31, the upper valve cover protects the valve, and an oil outlet valve is provided inside.

[0021] The first oil extraction pipe 4 and the second oil extraction pipe 6 further include an oil extraction chamber 41 and a protective sleeve 42. An oil extraction pipe opening is communicated with the outside of the oil extraction chamber 41. The oil extraction pipe opening penetrates through the oil extraction chamber 41 and extends to the outside of the lower sealing pipe 1. A protective sleeve 42 is disposed around the outside of the oil extraction chamber 41. The first switching valve 43 is provided at the top of the oil extraction chamber 41. Two oil extraction pipes at different positions can respectively perform oil extraction work at different heights of the entire downhole hydraulic oil pump.

[0022] The lower sealing pipe 1 is fixedly connected to the oil extraction pipe 2. A positioning collar 11 is provided around the outside of the lower sealing pipe 1, and the positioning collar 11 is fixedly connected to the first oil extraction pipe 4. The lower sealing pipe 1 can position and protect the overall bottom and the first oil extraction pipe 4.

[0023] The flow splitting assembly 5 further includes a blocking block 52, which is fixedly arranged inside the flow splitting assembly 5. A plurality of flow blocking plates 53 are provided at the bottom of the blocking block 52. Oil passing holes are evenly arranged inside the flow blocking plates 53. A check valve 55 is provided at one end of the second delivery pipe 54. An oil passing groove is provided between the check valve 55 and the flow splitting chamber 51, and the oil passing groove is arranged outside the blocking block 52. The flow splitting assembly 5 near the bottom can split and block the oil body pumped by the first oil extraction pipe 4 during operation through the flow splitting chamber 51 and the blocking block 52, and slowly transport it into the second delivery pipe 54 under the action of pressure.

[0024] A vertical rod 71 is arranged inside the delivery chamber 7. The vertical rod 71 is hollow. One end of the bottom of the vertical rod 71 is connected to the first switching valve 43 of the second oil extraction pipe 6. The oil body after oil extraction is transported through the delivery chamber 7 and the vertical rod 71 respectively.

[0025] The first switching valve 43 of the first oil extraction pipe 4 is communicated with the flow splitting assembly 5. An empty groove is provided between the second delivery pipe 54 and the second oil extraction pipe 6. An oil delivery hose is arranged inside the empty groove, and both ends of the oil delivery hose are respectively communicated with the second delivery pipe 54 and the delivery chamber 7. During the transportation process, the oil body is transported around the second oil extraction pipe 6 at a higher position, which can ensure the balance of the pressure received by the whole from the outside to the inside and ensure the stability of the whole.

[0026] The return chamber 8 is provided with two connection ports, which are respectively communicated with the delivery chamber 7 and the vertical rod 71, and solenoid valves are provided at the connection parts. At the position of the return chamber 8, the transportation of the oil body at different positions can be switched and controlled, and simultaneous oil extraction and separate transportation at different heights can be realized.

[0027] The top of the return chamber 8 is communicated with a second switching valve 9, and the second switching valve 9 is arranged inside the first delivery pipe 3 and communicated with the upper valve cover 32.

[0028] The working principle of the present invention:

[0029] Refer to the attached Figure 1 : Two oil extraction pipes at different positions are arranged at different heights of the whole downhole hydraulic oil extraction pump, and oil extraction work can be carried out separately. The oil body after oil extraction is transported through the delivery chamber 7 and the vertical rod 71 respectively, and at the position of the return chamber 8, the transportation of the oil body at different positions can be switched and controlled, and simultaneous oil extraction and separate transportation at different heights can be realized, and simultaneous oil extraction operations for oil layers at different depths can be completed;

[0030] Refer to the attached Figure 1 、 Figure 2 andFigure 3 : The flow splitting component 5 near the bottom can split and block the oil pumped by the first oil suction pipe 4 during operation through the flow splitting cavity 51 and the blocking block 52, and slowly transport it into the second delivery pipe 54 under the action of pressure. Moreover, during the transportation process, the oil is transported around the second oil suction pipe 6 at a higher position, which can ensure the balance of the pressure received from the outside to the inside as a whole, guarantee the stability of the whole. The lower sealing pipe 1 at the bottom can position and protect the whole bottom and the first oil suction pipe 4.

[0031] Finally, several points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or the communication inside two components. It can be directly connected. The terms "upper", "lower", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;

[0032] Second: In the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments of the present invention are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0033] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A through-type downhole hydraulic oil pump, comprising a lower sealing pipe (1), characterized in that: The top of the lower sealing pipe (1) is provided with an oil extraction pipe (2), the lower sealing pipe (1) is arranged around the outside of the oil extraction pipe (2), the top of the oil extraction pipe (2) is provided with a first delivery pipe (3), a first oil extraction pipe (4) is arranged inside the lower sealing pipe (1), the first oil extraction pipe (4) is communicated with the oil extraction pipe (2), a flow splitting assembly (5) is arranged at the bottom of the inner wall of the oil extraction pipe (2), the flow splitting assembly (5) includes a flow splitting chamber (51) and a second delivery pipe (54), one end of the first oil extraction pipe (4) is matched with the flow splitting chamber (51), a second oil extraction pipe (6) is arranged at the top of the flow splitting assembly (5), the first oil extraction pipe (4) and the second oil extraction pipe (6) both include a first switching valve (43), a delivery chamber (7) and a vertical rod (71) are arranged inside the first delivery pipe (3), a reflux chamber (8) is arranged at the top of the delivery chamber (7), the flow splitting assembly (5) further includes a blocking block (52), the blocking block (52) is fixedly arranged inside the flow splitting assembly (5), a plurality of flow blocking plates (53) are arranged at the bottom of the blocking block (52), oil through holes are uniformly arranged inside the flow blocking plates (53), a check valve (55) is arranged at one end of the second delivery pipe (54), an oil through groove is arranged between the check valve (55) and the flow splitting chamber (51), the oil through groove is arranged outside the blocking block (52), the first switching valve (43) of the first oil extraction pipe (4) is communicated with the flow splitting assembly (5), an empty groove is arranged between the second delivery pipe (54) and the second oil extraction pipe (6), an oil delivery hose is arranged inside the empty groove, and two ends of the oil delivery hose are respectively communicated with the second delivery pipe (54) and the delivery chamber (7).

2. The through-type downhole hydraulic oil pump according to claim 1, characterized in that: The oil extraction pipe (2) and the first delivery pipe (3) are integrally arranged, an upper oil extraction port (31) is arranged inside the first delivery pipe (3), and an upper valve cover (32) is arranged inside the upper oil extraction port (31).

3. The through-type downhole hydraulic oil pump according to claim 1, characterized in that: The first oil extraction pipe (4) and the second oil extraction pipe (6) further include an oil extraction chamber (41) and a protective sleeve (42), an oil extraction pipe opening is communicated and arranged outside the oil extraction chamber (41), the oil extraction pipe opening penetrates through the oil extraction chamber (41) and extends to the outside of the lower sealing pipe (1), the protective sleeve (42) is arranged around the outside of the oil extraction chamber (41), and the first switching valve (43) is arranged at the top of the oil extraction chamber (41).

4. The inserted downhole hydraulic oil pump according to claim 3, characterized in that: The lower sealing pipe (1) is fixedly connected with the oil extraction pipe (2), a positioning collar (11) is arranged around the outside of the lower sealing pipe (1), and the positioning collar (11) is fixedly connected with the first oil extraction pipe (4).

5. The through-type downhole hydraulic oil pump according to claim 1, characterized in that: A vertical rod (71) is arranged inside the delivery chamber (7), the vertical rod (71) is hollow, and one end of the bottom of the vertical rod (71) is connected with the first switching valve (43) of the second oil extraction pipe (6).

6. The through-type downhole hydraulic oil pump according to claim 1, wherein: The reflux chamber (8) is provided with two connection ports, the two connection ports are respectively communicated with the delivery chamber (7) and the vertical rod (71), and electromagnetic valves are arranged at the connection parts.

7. The through-type downhole hydraulic oil pump according to claim 2, characterized in that: A second switching valve (9) is connected and provided at the top of the reflux chamber (8), and the second switching valve (9) is arranged inside the first conveying pipe (3) and communicated with the upper valve cover (32).

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