How to effectively prevent backflow of steam injection boiler and water treatment device?
Background Information
At present, when mobile steam injection boilers are used in thermal recovery steam injection wells, high-temperature steam is transported through high-pressure steam injection pipeline between steam injection boiler and steam injection wellhead.
According to the standard, when the ground high-pressure steam injection pipeline is connected, the thermal expansion displacement compensator should be installed when it is more than 100 meters.
In practical work, it often occurs that after the boiler stops steam injection, due to the high bottom hole pressure, the steam flows back into the steam injection boiler and water treatment system through the steam injection pipeline, resulting in the oil entering into the pipeline of the steam injection boiler, oil entering into the resin in the water treatment device, and other accidents endangering the operation safety of the boiler equipment.
At present, the steam injection compensator used in oil field only has displacement compensation function, which can’t stop steam backflow.
In view of the above defects existing in the existing technology, Sanjack company provides a new type of steam injection compensator with a non-return function.
The technical purpose is to provide a new type of steam injection compensator with a check function in view of the above defects in the prior art, prevent the steam from pouring back into the steam injection boiler and water treatment system, and effectively ensure the safe operation of the steam injection boiler system.
The technical scheme is: it is mainly composed of clamp head A (1), multiple high-pressure pipes, multiple profiled elbows, multiple sealing boxes, check valve (14) and clamp head B (15).
The clamp head A (1) is the steam inlet, which is connected to one end of the check valve (14) through a plurality of high-pressure pipes, a plurality of profiled elbows and a plurality of sealing boxes, the other end of the check valve (14) is connected with the clamp head B (15), and the clamp head B (15) is the steam outlet.
The above sealing is mainly composed of the main body, high-pressure central pipe (16), gland (17), sealing assembly (18) and a sealing letter internal thread block (20). The top of the main body is connected with the high-pressure central pipe (16) through the gland (17), a sealing assembly (18) is arranged between the high-pressure central pipe (16) and the inner cavity of the main body, and a sealing letter internal thread block (20) is arranged on the bottom side of the main body to form a connection with the high-pressure central pipe (16) connected channel.
A retaining ring (19) is arranged at the bottom of the sealing assembly (18).
The check valve (14) is mainly composed of valve housing a (21), valve core (22), spring (23) and valve housing B (25). The valve housing a (21) and valve housing B (25) form a valve body. A valve core (22) is arranged in the inner cavity of the valve body, a spring (23) is arranged on the valve core (22), and through-holes are respectively arranged at both ends of the valve body.
The middle part of the inner cavity of the valve body is provided with a guide block (24).
Therefore, through the addition of check valve, the reflux stream from the wellhead is cut off here, and the front-end steam injection boiler and water treatment system are protected from the influence of high-pressure and high-temperature reflux steam, which effectively ensures the safe operation of the steam injection boiler system, with simple structure, good sealing and convenient installation.
Clamp head A (1), high-pressure pipe A (2), special-shaped elbow A (3), sealing box A (4), high-pressure pipe B (5), sealing box B (6), special-shaped elbow B (7), high-pressure pipe B (8), special-shaped elbow C (11), sealing box C (12), special-shaped elbow D (13), check valve (14), clamp head B (15)
Specific embodiments
The product is further described in combination with figure 1-3:
The technical scheme is: it is mainly composed of a clamp head a (1), a plurality of high-pressure pipes, a plurality of special-shaped elbows, a plurality of sealing letters, a check valve (14) and a clamp head B (15). The clamp head a (1) is a steam inlet, which is connected to one end of the check valve (14) through a plurality of high-pressure pipes, a plurality of special-shaped elbows and a plurality of sealing letters, and the other end of the check valve (14) is connected to the clamp head B (15) , clamp head B (15) is the steam outlet.
Among them, the sealing is mainly composed of the main body, high-pressure central pipe (16), a gland (17), a sealing assembly (18) and a sealing letter internal thread block (20). The top of the main body is connected with the high-pressure central pipe (16) through the gland (17), a sealing assembly (18) is arranged between the high-pressure central pipe (16) and the inner cavity of the main body, and a sealing letter internal thread block (20) is arranged on the bottom side of the main body to form a connection with the high-pressure central pipe (16) connected channel.
In addition, a retaining ring (19) is arranged at the bottom of the sealing assembly (18).
The check valve (14) is mainly composed of a valve shell a (21), a valve core (22), a spring (23) and a valve shell B (25). The valve shell a (21) and the valve shell B (25) form a valve body.
A valve core (22) is arranged in the inner cavity of the valve body, a spring (23) is arranged on the valve core (22), and through holes are respectively arranged at both ends of the valve body.
