CN220036902U - Blowout prevention oil pump - Google Patents

Abstract

The utility model provides a blowout prevention oil-well pump, pump barrel lower clutch, oil feed valve connect gradually, and junction keeps sealedly, and plunger, discharge valve, disk seat connect in proper order, and junction keeps sealedly, and plunger, discharge valve, disk seat connect and place in the pump barrel, plunger and pump barrel cooperation are sealed, and the oil drain pin is installed on pump barrel lower clutch, and the inner end of oil drain pin is in the centre bore of pump barrel lower clutch, and there is the blind hole inside of oil drain pin, the port of blind hole outwards, the external diameter of disk seat connect is greater than the internal diameter of centre bore, make disk seat connect and touch the oil drain pin when being in the lower initial point, the centre bore in install sealing device, install the slotted hole on the sealing device, the slotted hole cover on the oil drain pin, make sealing device can not break away from the centre bore, sealing device blocks up the centre bore, makes well fluid can not pass through the centre bore upward flow, makes it need not take well operation, has eliminated the influence of well operation to the oil well production.

Description

Blowout prevention oil pump

Technical Field

The utility model relates to a device for an oil pumping well in an oil field, in particular to a blowout prevention oil pump.

Background

When the wellhead pressure is greater than zero in the pumping process of the pumping well, blowout occurs, and major engineering accidents occur. The current method of preventing blowout is well killing. The well killing is to put a well killing pipe column into the well, the well killing pipe column is put near the upper part of the stratum, then high-density liquid is pumped into the well killing pipe column, the well liquid with low density in the well shaft is replaced, the well shaft is filled with the high-density liquid, the liquid column pressure of the high-density liquid in the well shaft is higher than the stratum pressure, so that the stratum high-pressure liquid cannot flow into the well shaft to be sprayed to the ground, and the wellhead pressure is guaranteed to be zero. Because the well is pressed to make the bottom pressure higher than the stratum pressure, the stratum is pressed down, so that the oil layer is polluted, the oil well yield is reduced, and great economic loss is generated. Some pumping wells have no blowout sign when being pumped down, and the blowout is predicted not to occur in the pumping down process, so that the well is not pumped down before the pumping down in order to prevent the stratum from being polluted by pressure. However, some wells cannot be gripped, and the well blowout is likely to be marked suddenly in the process of pumping down, so that the pump is stopped temporarily to perform well operation with pump pressure. Because the pump string is not lowered to the depth of the normal well killing at this time, the well killing only uses the high-density well killing liquid to push the low-density well killing liquid in the well shaft into the stratum, so that the well shaft is filled with the high-density well killing liquid, the low-density well killing liquid in the well shaft is pushed to the stratum to pollute the stratum, the stratum is easily blocked, and the subsequent oil well cannot normally produce oil.

Disclosure of Invention

The utility model aims to design a blowout prevention oil pump, so that well killing operation is not needed before and during the pumping process, the operation procedures are reduced, stratum pollution is avoided, the influence of well killing operation on oil production of an oil well is eliminated, and the economic benefit of the oil well is improved.

The purpose of the utility model is realized in the following way: the oil-discharging device comprises a pump barrel, a plunger, a discharge valve, a valve seat joint, a pump barrel lower joint, an oil inlet valve and an oil discharging pin, wherein the pump barrel, the pump barrel lower joint and the oil inlet valve are sequentially connected, the joint is kept sealed, the plunger, the discharge valve and the valve seat joint are placed in the pump barrel, the plunger and the pump barrel are matched and sealed, the oil discharging pin is installed on the pump barrel lower joint, the inner end of the oil discharging pin is positioned in a central hole of the pump barrel lower joint, a blind hole is formed in the oil discharging pin, the port of the blind hole is outwards, the outer diameter of the valve seat joint is larger than the inner diameter of the central hole, the oil discharging pin is not touched when the valve seat joint is positioned at a lower starting point, a sealing device is installed in the central hole, the slotted hole is sleeved on the oil discharging pin, the sealing device cannot be separated from the central hole in the well in the process, and the central hole is blocked by the sealing device 8 in the well in the process, so that fluid cannot flow upwards through the central hole in the well process.

The beneficial effects of the utility model are as follows: the sealing device blocks the central hole, and well fluid cannot flow upwards through the central hole, so that well killing operation is not needed before and during the pumping process, the operation is reliable, normal production of an oil well is not influenced, operation procedures are reduced, stratum pollution is avoided, influence of well killing operation on oil production of the oil well is eliminated, and obvious economic benefit is achieved.

Drawings

Fig. 1 is a structural diagram of the present utility model.

Detailed Description

An embodiment of the present utility model will be described in detail with reference to fig. 1. As can be seen from FIG. 1, the embodiment of the utility model comprises a pump barrel 3, a plunger 4, a discharge valve 5, a valve seat joint 6, a pump barrel lower joint 7, an oil inlet valve 9 and a drain pin 11, wherein the pump barrel 3, the pump barrel lower joint 7 and the oil inlet valve 9 are sequentially connected, the joint is kept sealed, the plunger 4, the discharge valve 5 and the valve seat joint 6 are sequentially connected, the plunger 4, the discharge valve 5 and the valve seat joint 6 are placed in the pump barrel 3, the plunger 4 is matched with the pump barrel 3 for sealing, the drain pin 11 is arranged on the pump barrel lower joint 7, the inner end of the drain pin 11 is positioned in a central hole 7-1 of the pump barrel lower joint 7, the axis of the drain pin 11 is perpendicular to the axis of the central hole 7-1, a blind hole is arranged in the interior of the drain pin 11, the end opening of the blind hole is outwards, the outer diameter of the valve seat joint 6 is larger than the inner diameter of the central hole 7-1, the joint 6 is enabled not to touch the drain pin 11 when being positioned at the lower starting point, a sealing device 8 is arranged in the central hole 7-1, the sealing device 8 is arranged on the valve seat joint 8, the sealing device 8 is arranged in the central hole 7-1, the sealing device 8 is enabled to be separated from the central hole 7-1 through the well hole, and the well hole can not be blocked by the sealing device 7-1, and the well hole can be enabled to flow upwards and flow through the sealing device 7-1. The upper part of the sealing device 8 is positioned at the upper end of the central hole 7-1, the lower part of the valve seat joint 6 can be bumped and pressed against the upper part of the sealing device 8 when being positioned at the lower starting point, and the lower part of the sealing device 8 is pushed into the upper cavity of the oil inlet valve 9 to form a liquid flow channel capable of flowing upwards, so that the utility model can work normally.

The material of the sealing device 8 is soluble metal, and can be dissolved in well fluid within a set time after the sealing device is lowered to a designed position (generally 8-50 h according to well depth and operation speed). After the sealing device 8 is dissolved, the utility model can work normally. The upper part of the pump cylinder 3 is provided with a lower pump cylinder joint 10 so as to be connected with an upper pump oil pipe.

The oil drain device is formed by the pump barrel lower joint 7 and the oil drain pin 11, so that the blowout prevention and oil drain device is organically combined, the function of the oil pump is increased, and the service performance is good.

Claims (1)

1. The utility model provides a blowout prevention oil-well pump, including pump barrel (3), plunger (4), discharge valve (5), disk seat connects (6), pump barrel lower clutch (7), advance oil valve (9), drain pin (11), pump barrel (3), pump barrel lower clutch (7), advance oil valve (9) connect gradually, junction keeps sealedly, plunger (4), discharge valve (5), disk seat connect (6) and place in pump barrel (3), plunger (4) and pump barrel (3) cooperation seal, drain pin (11) are installed on pump barrel lower clutch (7), the inner end of drain pin (11) is in centre bore (7-1) of pump barrel lower clutch (7), the inside of drain pin (11) has the blind hole, the external diameter of disk seat connects (6) is greater than centre bore (7-1) the internal diameter that makes disk seat connect (6) be in and does not touch drain pin (11) when being in down, characterized by: the sealing device (8) is arranged in the central hole (7-1), the sealing device (8) is provided with a slotted hole (8-1), the slotted hole (8-1) is sleeved on the oil drainage pin (11), the sealing device (8) can not be separated from the central hole (7-1) in the well descending process, the sealing device (8) blocks the central hole (7-1), and well fluid can not flow upwards through the central hole (7-1) in the well descending process.