CN202157766U - Horizontal well turbine sand removal device - Google Patents

Abstract

The utility model is a turbine sand cleaning device for a horizontal well, which is composed of a lengthening coupling (1), a main shaft (2), a centralizing sleeve (3) and the like, and is characterized in that the left end of the main shaft (2) is an oil pipe thread lengthening coupling (1), the round centralizing sleeve (3) is fixedly installed in the middle of the main shaft (2) by means of fitting and welding, the outer diameter of the centralizing sleeve (3) is larger than the outer diameter of the turbine (4), and there are multiple The through holes are liquid flow channels. The right end of the main shaft (2) is connected with the turbine (4) and the swivel head (7), and the two ends of the turbine (4) are fixedly installed by bearings (5), and the clearance is adjusted with the lock nut (6). The rotary head (7) of conical mesh shape is fixed on the front end face of the turbine (4) by welding, driven by the turbine (4) to rotate. The utility model can improve the mud and sand cleaning effect in the wellbore, does not need to inject surfactant for soaking before construction, and does not pollute the formation and the environment. Shorten the construction time, reduce the amount of sand washing fluid, and save construction costs.

Description

Horizontal well turbine sand cleaning device

technical field

The utility model relates to a sand washing device in a well, in particular to a turbine sand cleaning device for a horizontal well.

Background technique

In the formation of unconsolidated sandstone reservoirs, the diagenesis is poor, the cementation is loose, and the shale content of the cement is high. Even though there are various sand control methods, it is impossible to completely avoid sand production in oil and gas wells due to various reasons. After the sand is produced in the oil layer, if the rising speed of the wellbore fluid is not enough to bring the mud and sand to the surface, the mud and sand will settle down in the wellbore. Cause serious damage to the oil pumping equipment, and even lead to the failure of the oil pumping equipment. Therefore, in order to restore the normal operation of the sand producing oil well, measures must be taken to remove the mud and sand deposited in the wellbore.

The sand cleaning technology currently used in oilfields is positive circulation sand washing. Before construction, it is necessary to inject surfactant to soak the mud and sand deposited in the wellbore, and then inject fluid to the bottom of the well through the tubing to wash away the sand plug at high speed. The returned liquid will bring the sand particles to the surface to relieve the problem of sand plugging in oil and water wells. With the development and application of horizontal wells, the cross-sectional area of the sand washing circulation channel is limited, and the shortcomings of the positive circulation sand washing process have emerged. Since the interception area of the oil casing annulus is larger than that of the flushing pipe hole, the upward return speed of the liquid flow becomes slow. In the wellbore of the long well section of the horizontal well, the sand-carrying ability of the sand washing fluid is poor, and the mud and sand are precipitated again under its own gravity, and only a part of the mud and sand returns to the ground with the liquid that returns upwards. The sand washing is not complete, and the construction effect is not ideal.

Contents of the invention

According to the above-mentioned technical problems, the utility model provides a horizontal well turbine sand cleaning device for removing sand plugging and restoring normal production of oil, gas and water wells. (4), bearing (5), lock nut (6) and rotary head (7). It is characterized in that the left end of the main shaft is an oil pipe thread extension collar, and there is a liquid on the extension collar that is inclined by 45°. Flow channel, the middle of the main shaft is a centralizing sleeve, which is fixedly installed on the main shaft by means of fitting and welding, the centralizing sleeve is round, the outer diameter of the centralizing sleeve is larger than the outer diameter of the turbine, and there are multiple through holes in the axial direction of the centralizing sleeve It is a liquid flow channel, the right end of the main shaft is connected to the turbine and the rotating head, the two ends of the turbine are fixed by bearings, and the lock nut is used to adjust the gap between the turbine and the rotating head, and the conical mesh-shaped rotating head is fixed on the front end of the turbine by welding The surface is rotated by the turbine.

The beneficial effects of the utility model are: during the workover operation of horizontal wells, vertical wells, and inclined wells, the utility model is used for construction operations to clean the mud and sand deposited in the wellbore out of the ground and restore the normal production of oil and gas wells, which can improve The cleaning effect of mud and sand in the wellbore. Since there is no need to inject surfactant for soaking before construction, it will not pollute the formation and the environment. The construction operation time is shortened, the amount of sand washing liquid is reduced, and the construction cost is saved.

Description of drawings

Fig. 1 is the front view of the utility model.

Detailed ways

An oil pipe thread extension collar (1) is installed on the left end of the device main shaft (2), and an inclined 45° liquid flow channel is arranged on the extension collar (1) as an uninterrupted circulation channel. A centralizing sleeve (3) is fixedly installed in the middle of the main shaft (2). The outer diameter of the centralizing sleeve (3) is larger than the outer diameter of the turbine (4). There are a plurality of through holes in the axial direction of the centralizing sleeve (3) as liquid flow channels. It does not affect the passage of the liquid flow, and maintains the rigidity of the core to ensure that the core supports the weight of the internal service pipe string and the rotation of the turbine (4) is not restricted by the gravity of the internal service pipe string. The right end of the main shaft (2) is connected to the turbine (4) and the swivel head (7). The two ends of the turbine (4) are fixed by the bearings (5), and the gap is adjusted with the lock nut (6) to ensure that the turbine (4) is under the impact of the water flow. 4) flexible rotation. The rotating head (7) is fixed on the front end of the turbine (4) by welding, and is driven to rotate by the turbine (4). The device is connected to the front end of the service pipe string in the sand flushing, and is lowered to the sand cleaning position for reverse circulation sand cleaning operation. The turbine (4) and the swivel head (7) rotate under the impact of the water flow, agitating the deposited sediment into mud soup, which enters the inner service pipe string and returns out. Due to the small interception area of the inner service pipe string, the inlet pressure and outlet pressure are different during construction. It maintains a balance, so the flow rate is fast and the sand-carrying force is strong. The mud and sand will not settle again during the upward return process, so as to achieve the ideal sand washing effect.

Claims (1)

1. a horizontal well turbine fettling installation is made up of lengthening box cupling (1), main shaft (2), supporting positive cover (3), turbine (4), bearing (5), locking nut (6), spinning roller head (7), it is characterized in that the left end at main shaft (2) is a tubing round thread lengthening box cupling (1); The fluid course that one 45 ° inclination is arranged on the lengthening box cupling (1); As uninterrupted circulation canal, the centre of main shaft (2) is supporting positive cover (3), and supporting positive cover (3) adopts the mode of suit and welding to be fixedly mounted on the main shaft (2); Supporting positive cover (3) is the circle shape; The external diameter of supporting positive cover (3) is greater than turbine (4) external diameter, and a plurality of through holes that axially have of supporting positive cover (3) are fluid course, and the right-hand member of main shaft (2) connects turbine (4) and swivel head (7); Turbine (4) two ends are fixedly mounted by bearing (5); Regulate the gap with locking nut (6), the swivel head of the netted shape of circular cone (7) is fixed by welding in the front end face of turbine (4), by turbine (4) driven rotary.

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