A fireflooding oil well pump comprises an upper pump cylinder which is connected with a bearing outer cylinder through an oil blending connector, a core rod penetrates through the upper pump cylinder and sleeved with an upper plunger, the upper end of the upper plunger is connected to the core rod through an oil outlet connector, the lower end of the upper plunger is connected with a lower plunger, and the lower plunger is sleeved with a lower pump cylinder; a split-flow connector is connected between the upper plunger and the lower plunger and is provided with an eccentric hole and an inner hole which are arranged in parallel, a side hole is formed in the split-flow connector and communicated with the eccentric hole, the lower end of the core rod is communicated with the eccentric hole, and the upper end of the lower plunger is communicated with the inner hole; a plurality of travelling valves are connected to the lower end of the lower plunger in series, and the lower ends of the travelling valves are connected with travelling valve connectors; a plurality of fixing valves are connected to the lower end of the lower pump cylinder in series, and the lower ends of the fixing valves are connected with fixing valve connectors The fireflooding oil well pump not only can blend a viscosity reducing agent in the pit, but also can perform extraction on crude oil in the pit, and can make the viscosity reducing agent be blended in the pit smoothly and effectively improve the extraction effect of a fireflooding oil well, and service life of the oil well pump is prolonged

Fireflooding oil well pump

The invention discloses a horizontal well gravel packing tool which comprises a connecting collar, an outer cylinder, a liner, an upper core tube, a core tube collar, a lower core tube, an outer cylinder centralizer, a spring sleeve, a sliding sleeve, a spring, a liner guider, a wire-wrapped screen, a plug and a guide head The tool is capable of conveniently and mechanically positioning, heavy work of largely and accurately calculating tubular columns is decreased for constructors, a central inserting tube is only tripped in, fixed and lifted out, simple to operate, safe and reliable during construction, a packing port of an outer tool is closed twice by the aid of the tool, gravel regurgitation is avoided after construction, and a packing port of the central inserting tube falls by a certain depth and enters the bottom of an inner cavity of the outer packing tool after the central inserting tube is positioned By the aid of the structure, gravels cannot enter the space between the central inserting tube and the outer packing tool even if the tubular columns move when the central inserting tube is packed, so that the major accident of sand jamming of the tubular columns is avoided

Horizontal well gravel packing tool

The invention discloses a multi-turn gravel filling tool. The multi-turn gravel filling tool comprises an inverted releasing pipe column, a setting pipe column and a filling service pipe column; the inverted releasing pipe column comprises an upper joint, a piston pipe and an inverted connecting pipe which are sequentially connected from top to bottom, a supporting ring, a releasing spring and a releasing joint are sequentially arranged outside the inverted connecting pipe in a sliding and sleeving mode from top to bottom, the supporting ring and the releasing joint are connected together through the releasing spring, the outer circle end surface of the lower end of the supporting ring is in contact connection with a fishing head, a center hole of the releasing joint is a square hole, theinner surface of the releasing joint is in limiting fit with the inner wall of the inverted connecting pipe in the circumferential direction, and the releasing joint is in threaded connection with a center pipe; the filling service pipe column comprises an inner filling pipe and an outer filling pipe arranged outside the inner filling pipe in a sleeving mode, and a sliding sleeve used for blockingan outer filling opening is arranged between the inner filling pipe and the outer filling pipe; and a sliding valve used for blocking an inner filling opening is arranged in the inner filling pipe. According to the multi-turn gravel filling tool, the multi-turn gravel filling tool can be inverted firstly, then filling can be carried out, multi-turn gravel filling can be realized, the risk is greatly reduced, and the economic benefit is improved.

Multi-turn gravel filling tool

The utility model discloses a gravel filling device which comprises a sliding sleeve switch body (21) and an inner sliding sleeve (22) arranged in the sliding sleeve switch body. The inner sliding sleeve (22) enables the sliding sleeve switch body to be divided into an upper cavity (211) and a lower cavity (212), wherein the upper cavity (211) and the lower cavity (212) are relatively independent and are not communicated with each other. Due to isolation effect of the inner sliding sleeve, gravels in the upper cavity cannot enter the lower cavity where a spring is located, thereby preventing the spring from being stuck by the gravels, and guaranteeing reset of the inner sliding groove.

Gravel filling device

The utility model relates to a fireflood well gas-proof and oil recovery integrated tubular column. The fireflood well gas-proof and oil recovery integrated tubular column comprises from top to bottom an air discharge type gas proof pump, a gas anchor and a pipe plug, and the air discharge type gas proof pump, the gas anchor and the pipe plug are connected in sequence. The air discharge type gas proof pump comprises a pump cylinder, and a through hole is formed in a cylinder wall of the middle portion of the pump cylinder. A fixing valve is fixed outside the bottom of the pump cylinder. A pump cylinder upper connector is connected outside the top of the pump cylinder and a valve cover is horizontally arranged inside the pump cylinder upper connector. An axial centre hole is formed in the valve cover and a plurality of through holes are arranged on the side of the centre hole. A plunger is arranged in the pump cylinder in a sealing and sliding mode, the plunger is in a cylinder shape, a connecting rod penetrates through the centre hole of the valve cover and the plunger along the axial direction, a traveling valve is arranged at the bottom of the connecting rod, and the traveling valve is arranged at the bottom of the cylinder of the plunger in a sealing and clamping mode. An upper blocking cover is arranged on the connecting rod and located on the upper side of the plunger, the upper blocking cover is arranged at the top of the cylinder of the plunger in a sealing and covering mode. The axial distance between the upper blocking cover and the traveling valve is bigger than the axial length of the plunger. The fireflood well gas-proof and oil recovery integrated tubular column adopts the combination of the gas anchor and the gas proof pump, achieves two gas-oil separation of the fireflood high-gas well up the pump and down the pump, improves gas-oil separating efficiency of the fireflood production well output liquid, achieves normal production of the oil well and improves oil recovery efficiency.

Fireflood well gas-proof and oil recovery integrated tubular column

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Gravel filling device

Fireflood well gas-proof and oil recovery integrated tubular column