The invention discloses a device for increasing gas in a container through built-in chemical articles in a underwater electric wire connecting device. According to the technical scheme, the device for increasing gas in the container through the built-in chemical articles increasing gases in the underwater electric wire connecting device comprises an underwater electric wire connecting waterproof device, and is characterized by adding a support (7), a chemical medicine (9) and a chemical medicine basket (8) in the container (6). When water submerges a container pot and the water inside the container pot reaches the position of the chemical medicine basket, the device for increasing gas in the container through the built-in chemical articles in the underwater electric wire connecting device can automatically conduct air-entrapping to increase the air in the container pot so as to keep the water level in the container pot always under a warning position, and thus the safety of the underwater electric wire connecting waterproof device is guaranteed.

Device for increasing gas in container through built-in chemical articles in underwater electric wire connecting device

The invention discloses a steam channeling prevention and control device and a method thereof for thermal production well operation, and relates to the technical field of oil and gas exploitation. Thesteam channeling prevention and control device for the thermal production well operation comprises a first blowout preventer, a wellhead device, a second blowout preventer and a liquid level monitoring device. The first blowout preventer comprises a first clamping element and a second clamping element connected with the first clamping element in a hinged mode; the wellhead device can be connectedto a steam injection string and setting seal can be carried out between the wellhead device and a casing, and the wellhead device is used for monitoring the pressure in the casing and opening and closing the steam injection string; the second blowout preventer is used for arranging on the wellhead device in a sleeving mode after the setting seal is carried out between the wellhead device and thecasing; and liquid level monitoring device is connected to a side end opening of a first four-way device for achieving liquid level monitoring during operation. According to the steam channeling prevention and control device and the method thereof for the thermal production well operation, a second four-way device can be controlled to be removed when the thermal production well is subjected to workover treatment, the effective control of the thermal production well is realized, and the risk of wellhead failure is eliminated.

Steam channeling prevention and control device and method thereof for thermal production well operation

The invention relates to the technical field of oil recovery devices, particularly to a multifunctional thermal recovery device for a heavy oil well. The thermal recovery is suitable for recovery of heavy oil heating wells. The thermal recovery device comprises a pumping unit, a sucker rod, a wellhead oil transportation assembly, an upper flange, a wellhead cross, a middle flange, an oil pipe and an oil well pump, wherein the middle flange is arranged between the wellhead cross and the upper flange, the middle flange is provided with an oil pipe through hole and a heating pipe through hole axially, a heating pipe hanger is disposed in the heating pipe through hole, the lower portion of the heating pipe hanger is connected with a heating pipe which extends under the well, a heating pipe lead-in hole is arranged at the position of the middle flange or the upper flange, which is close to the heating pipe hanger, and the upper flange is provided with an eccentric through hole corresponding to the oil pipe through hole. The multifunctional thermal recovery device has the advantages that the structural design is reasonable, maintenance is reduced, other operations of the oil well are not affected, and many defects caused by the fact that heating is performed by the aid of the sucker rod in the existing thermal recovery technology are overcome.

Multifunctional thermal recovery device for heavy oil well

The utility model provides an injection-production integrated double-tube thermal recovery wellhead device. The injection-production integrated double-tube thermal recovery wellhead device comprises a tubing head four-way joint; a four-way joint, an oil pipe hanging flange and a kill fluid circulation passage, wherein the four-way joint is connected above the tubing head four-way joint; the oil pipe hanging flange is connected above the four-way joint; and the kill fluid circulation passage is connected with one of the ports of the four-way joint. According to the utility model, the operation process is greatly reduced; the operation cost is reduced; moreover, the problem of overflowing of a well is solved; the production season is effectively ensured and the single well development effect of an extra-heavy oil horizontal well is obviously improved.

Injection-production integrated double-tube thermal recovery wellhead device

The utility model provides a cable joint protective cover, sparking and electric leakage accidents caused by the fact that an insulating skin at a cable joint position of a hollow pumping rod of a pumping unit is aged, rained or damaged due to long-time bareness can be solved and prevented, and a cable joint can be safely and reliably fixed in a protective cover. The cable joint protective cover comprises a first housing and a second housing which are buckled and clamped, and an opening for allowing a cable to go in and out is formed under the clamping state. The cable joint protective cover is characterized in that an insulating housing is formed at an internal wall surface of each of the first housing and the second housing, a first annular separating cavity and a second annular separating cavity with different sizes are formed in the insulating housing, an insulating separator plate is disposed between the two separating cavities in a manner of protruding from the inner wall of the insulating housing, an insulating baffle block is disposed in the small second separating cavity in a manner of protruding from the inner wall of the insulating housing, and the first annular separating cavity and the second annular separating cavity are both communicated with the opening.

Cable joint protective cover

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Injection-production integrated double-tube thermal recovery wellhead device

Cable joint protective cover