CN-122014578-A - Cable-passing oil pump

Abstract

The utility model provides a cross cable oil-well pump, go up the pump barrel, advance oil valve body, lower pump barrel connects gradually, there is the eccentric opening on the play oil valve body, heating cable outsourcing wrapping insulating layer, heating cable passes the eccentric opening on the play oil valve body, weld into an organic wholely between insulating layer and the play oil valve body, the play oil valve is installed on play oil valve body, play oil valve seat, the axis that goes out oil valve seat connects is in one side of play oil valve body axis, heating cable's upper segment passes out the joint, go up the plunger, go up the oil valve body and connect gradually, heating cable's lower segment passes UNICOM joint, lower plunger, go out oil valve body, UNICOM joint, lower plunger connects in proper order, there is the feed liquor passageway on the UNICOM joint, go out to have the drain passageway on the joint, go up the pump barrel and be in one side of taking oil valve body axis down, set up the feed liquor hole on the oil valve body, the feed liquor hole be in the opposite side of axis the lower part installation of feed liquor hole, go up the plunger down in going into down the pump barrel down.

Inventors

• LI GANG
• ZHENG SHUAI
• CHEN GUANYU

Assignees

• 东营市汇诚石油工程技术有限责任公司

Dates

Publication Date

20260512

Application Date

20260412

Claims (3)

1. 1. The utility model provides a cross cable oil-well pump, includes out connects (2), goes up pump cylinder (3), goes up plunger (4), delivery valve (5), goes out oily valve body (6), UNICOM connects (7), advances oil valve body (8), advances oil valve (9), down pump cylinder (10), plunger (11) down, insulating layer (12), heating cable (13), goes up pump cylinder (3), advances oil valve body (8), the oil valve body, The lower pump cylinder (10) is sequentially connected, the joint is kept sealed, the pump diameter of the upper pump cylinder (3) is larger than that of the lower pump cylinder (10), a cavity (8-1) is arranged in the oil inlet valve body (8), the cavity (8-1) is positioned between the upper pump cylinder (3) and the lower pump cylinder (10), the upper pump cylinder (3) and the lower pump cylinder (10) are coaxial, the upper plunger (4) is sealed with the upper pump cylinder (3) in a matched manner, the lower plunger (11) is sealed with the lower pump cylinder (10) in a matched manner, and the oil outlet valve body (6) is provided with an eccentric hole, a heating cable (13) is wrapped with an insulating layer (12), the heating cable (13) penetrates through the eccentric hole on the oil outlet valve body (6), the insulating layer (12) and the oil outlet valve body (6) are welded into a whole, a welding line is kept sealed, the oil outlet valve (5) is arranged on the oil outlet valve body (6), and the oil outlet valve (5) comprises an oil outlet valve ball, The oil outlet valve seat is arranged in a valve cavity of the oil outlet valve body (6), the oil outlet valve seat is arranged in the oil outlet valve body (6), the upper end face of the oil outlet valve seat is propped against the inner shoulder of the oil outlet valve body (6), the oil outlet valve seat connector is in threaded connection with the oil outlet valve body (6), the upper end face of the oil outlet valve seat connector is propped against the lower end face of the oil outlet valve seat, the diameter of the oil outlet valve ball is larger than that of the oil outlet valve seat, the oil outlet valve ball is matched and sealed with the oil outlet valve seat, the axes of the oil outlet valve seat and the oil outlet valve seat connector are arranged on one side of the axis of the oil outlet valve body (6), the upper section of the heating cable (13) penetrates through the outlet connector (2), the upper plunger (4), the outlet connector (2), The upper plunger (4) and the oil outlet valve body (6) are sequentially connected, the lower section of the heating cable (13) passes through the communication joint (7) and the lower plunger (11), the oil outlet valve body (6), the communication joint (7) and the lower plunger (11) are sequentially connected, the upper plunger (4) and the lower plunger (11) are coaxial, a liquid inlet channel (7-1) is arranged on the communication joint (7), a liquid outlet channel (2-1) is arranged on the liquid outlet joint (2), and the liquid inlet channel (7-1) is connected through the oil outlet valve (5), The upper plunger (4) is communicated with the liquid outlet channel (2-1), so that well liquid can flow from the liquid inlet channel (7-1) to the liquid outlet channel (2-1), well liquid cannot flow from the liquid outlet channel (2-1) to the liquid inlet channel (7-1), the axes of the upper pump cylinder (3) and the lower pump cylinder (10) are positioned on one side of the central axis (8-3) of the oil inlet valve body (8), the oil inlet valve body (8) is provided with a liquid inlet hole (8-2), the liquid inlet hole (8-2) is positioned on the other side of the central axis (8-3), the liquid inlet hole (8-2) is communicated with the cavity (8-1), an oil inlet valve (9) is arranged at the lower part of the liquid inlet hole (8-2), well liquid can flow from the oil inlet valve (9) to the oil inlet valve body (8), cannot flow outwards from the oil inlet valve (8) through the oil inlet valve (9), and the upper plunger (4) and the lower plunger (3) enter the lower pump cylinder (10).
2. 2. The cable-passing oil well pump according to claim 1, wherein the sealing device (1) is arranged in the upper part of the outlet joint (2), and the upper part of the heating cable (13) is wrapped by the inner part of the sealing device (1).
3. 3. The cable-through oil-well pump according to claim 1 or 2, wherein the upper part of the outlet joint (2) is provided with a hollow rod external thread, and the lower part of the lower plunger (11) is provided with a hollow rod thread.

Description

Cable-passing oil pump Technical Field The invention relates to an oil-well pump for oil field mechanical oil extraction, which is used for thick oil exploitation and is a cable-passing oil-well pump. Background When crude oil in an oil well is thick, the thick oil is difficult to enter a pump, the common pump is difficult to pump the thick oil, and the thick oil well can pump oil only after being heated under the pump. The prior art such as a double-cylinder electric heating deep well oil pump with the patent number 96239334.7 can only be used for heating the pump cylinder, can not be used for heating the valve part of the pump, can not be used for heating the pump, has no obvious difference in heating effect compared with the common pump under the hollow sucker rod, and is poor in reliability due to the complexity of the pump. For example, the feedback type through-cable oil pump with the patent number 93221242.5 is hollow, the heating cable can be arranged below the pump, but the small pump is arranged above the heating cable, the large pump is arranged below the heating cable, and the connection between the sucker rod and the pump is completed by a hollow connector which can be sealed, so that the implementation difficulty is high. For example, the hollow sucker rod pump-crossing electric heating oil extraction device with the patent number 94230220.6 has a pump valve which is an annular cone and is driven by the sucker rod, the sealing performance of the pump valve is poor, the pump efficiency is low, the impact is generated during oil pumping, and the service life of an oil pumping system is influenced. For example, the feedback type thick oil pump with the patent number of 99207195.X is not hollow, and the cable cannot be lowered under the pump, so that the thick oil well cannot be normally used. Disclosure of Invention The invention aims to design a cable-passing oil pump, which can lower a cable under a pump to heat thick oil and overcome the problems, so that valve elements of an oil inlet valve and an oil outlet valve are of spherical structures. The purpose of the invention is realized in the following way: comprises an outlet joint, an upper pump cylinder, an upper plunger, an outlet valve body, a communicating joint, an inlet valve body, an inlet valve, a lower pump cylinder, a lower plunger, an insulating layer and a heating cable, wherein the upper pump cylinder, the inlet valve body and the lower pump cylinder are sequentially connected, the joint is kept sealed, the pump diameter of the upper pump cylinder is larger than that of the lower pump cylinder, a cavity is arranged in the inlet valve body, the cavity is arranged between the upper pump cylinder and the lower pump cylinder, the upper pump cylinder and the lower pump cylinder are coaxial, the upper plunger is sealed with the upper pump cylinder in a matching way, the lower plunger is sealed with the lower pump cylinder in a matching way, the outlet valve body is provided with an eccentric hole, the heating cable is wrapped with the insulating layer, the heating cable penetrates through the eccentric hole on the outlet valve body, the insulating layer and the outlet valve body are welded into a whole, the welding seam is kept sealed, the outlet valve is arranged on the outlet valve body, the outlet valve comprises an outlet valve ball, an outlet valve seat and an outlet valve seat joint, the oil outlet valve ball is positioned in a valve cavity of the oil outlet valve body, the oil outlet valve seat is arranged in the oil outlet valve body, the upper end face of the oil outlet valve seat is propped against an inner shoulder of the oil outlet valve body, the oil outlet valve seat connector is in threaded connection with the oil outlet valve body, the upper end face of the oil outlet valve seat connector is propped against the lower end face of the oil outlet valve seat, the diameter of the oil outlet valve ball is larger than that of the oil outlet valve seat, the oil outlet valve ball is sealed with the oil outlet valve seat in a matched manner, the axes of the oil outlet valve seat and the oil outlet valve seat connector are positioned at one side of the axis of the oil outlet valve body, the upper section of the heating cable penetrates through the oil outlet connector, the upper plunger and the oil outlet valve body to be connected in sequence, the lower section of the heating cable penetrates through the communicating connector and the lower plunger, the oil outlet valve body, the communicating connector and the lower plunger are connected in sequence, the upper plunger and the lower plunger are coaxially connected, the liquid inlet channel is arranged on the communicating connector, the liquid outlet channel is formed in the communicating connector through the oil outlet valve, the upper plunger is communicated with the liquid outlet channel, so that well liquid can flow from the liquid inlet channel to the liquid outlet channel,