CN211924107U

CN211924107U - Centrifugal vacuum degasser

Info

Publication number: CN211924107U
Application number: CN201922404312.XU
Authority: CN
Inventors: 陈本富
Original assignee: Sichuan Yutian Vacuum Technology Co ltd
Current assignee: Sichuan Yutian Vacuum Technology Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-11-13
Anticipated expiration: 2029-12-27

Abstract

Centrifugal vacuum degasser relates to the oil drilling field, the on-line screen storage device comprises a base, set up the vacuum tank on the base, set up the motor on the vacuum tank, set up the feed liquor pipe on the vacuum tank, the upper portion of feed liquor pipe penetrates the middle part in the vacuum tank and communicates with each other with the vacuum tank, the bottom intercommunication fluid-discharge tube of vacuum tank, communicate the exhaust tube between the upper portion of vacuum tank and catch water and the vacuum system, pivot lower part cavity, pivot lower part periphery installation and the hollow blade of intercommunication several, the blade is located the top of feed liquor pipe, the several through-hole is seted up on the upper portion of blade. The utility model discloses utilize the negative pressure principle, can increase the size that the gas invaded bubble in the drilling fluid, make the bubble obtain bigger buoyancy, make it faster float to the liquid surface for the disengaging process of bubble makes the bubble float to the surface and escapes, can also make the gas invade the drilling fluid and collides with the lower part of blade or the inner wall of vacuum tank, and bubble wherein receives the striking and is broken, makes the gas escape in the bubble to improve degassing effect.

Description

Centrifugal vacuum degasser

Technical Field

The utility model belongs to the technical field of the oil drilling and specifically relates to centrifugal vacuum degasser.

Background

In the modern oil industry, drilling fluids are essential production data in oil drilling processes. The drilling fluid is a working fluid used in a drilling process, is a circulating flushing medium used in a drilling hole in the drilling process, and when the drilling fluid flows in a downhole, the physical parameter which is most easy to change is the density of the drilling fluid. Because the drilling fluid is easily contaminated by various gases during the drilling process, the density of the drilling fluid is reduced. The decrease in the density of the drilling fluid, in turn, results in an increase in viscosity, which is referred to as gas-invaded drilling fluid. When the drilling fluid encounters the formation gas, the great pressure at the bottom of the well causes the gas to dissolve in the drilling fluid, and the high viscosity and high density of the drilling fluid prevents the gas from escaping and circulating in the well. If no measures are taken to remove gas polluting drilling fluid, after multiple cycles, the gas content in the drilling fluid is higher and higher, the gas dissolved in the drilling fluid is rapidly compressed under the high-pressure environment at the bottom of the well, the occupied volume is very small, the influence on the bottom pressure is negligible, but when the gas-invasion drilling fluid returns to the ground, due to the reduction of the pressure in the well, the gas in the gas-invasion drilling fluid forms bubbles with different sizes in the well, the bubbles occupy a large amount of underground space, the pressure in the well is reduced, the flow rate of the drilling fluid returning to the ground is accelerated, and well kick and blowout can occur when the phenomenon is serious. Therefore, it is necessary to use a degassing device to remove gas from gas-invaded drilling fluids. In the drilling fluid solid control equipment, a vibrating screen, a stirring device and a mud gun have certain degassing effect, and meanwhile, the sedimentation of the drilling fluid in a mud tank can also enable a part of bubbles to float upwards until the surface of the gas-cutting drilling fluid is broken and escaped. However, the vibrating screen, the stirring device and the mud gun can only remove part of bubbles in the gas-immersed drilling fluid, but due to the characteristic of high viscosity of the drilling fluid, part of bubbles still suspend below the liquid level and cannot float to the surface to be broken and escape.

SUMMERY OF THE UTILITY MODEL

For solving the poor problem of current degassing apparatus degasification effect, the utility model provides a centrifugal vacuum degasser, its degasification is effectual.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme: centrifugal vacuum deaerator, the on-line screen storage device comprises a base, set up the vacuum tank on the base respectively, catch water and vacuum pumping system, set up the motor on the vacuum tank, upper portion in the vacuum tank sets up vertical pivot, the motor passes through transmission and is connected with the pivot, set up the feed liquor pipe on the vacuum tank, the upper portion of feed liquor pipe penetrates the middle part in the vacuum tank and communicates with each other with the vacuum tank, the bottom intercommunication fluid-discharge tube of vacuum tank, communicate the exhaust tube between the upper portion of vacuum tank and catch water and the vacuum pumping system, pivot lower part cavity, pivot lower part periphery installation and the hollow blade of intercommunication several, the blade is located the top of feed liquor pipe, the several through-hole is seted up on the upper portion of.

In order to further achieve the purpose, the technical scheme is as follows: the periphery of the inner wall of the middle part of the vacuum tank is provided with an annular liquid guide plate. The liquid guide plate is obliquely arranged, and the included angle between the liquid guide plate and the horizontal direction is 60 degrees. The lower part of the rotating shaft is communicated with a conical flow guide cover, and the flow guide cover is positioned in the liquid inlet pipe. The upper part of the rotating shaft is provided with an arc-shaped fixed cover which is positioned above the blades. The through hole is in a Laval nozzle shape, the large-diameter end of the through hole is positioned on the outer wall of the blade, and the small-diameter end of the through hole is positioned on the inner wall of the blade.

The utility model has the advantages that: the utility model discloses utilize the negative pressure principle, can increase the size that the gas invaded bubble in the drilling fluid, make the bubble obtain bigger buoyancy, make it faster float to the liquid surface for the disengaging process of bubble makes the bubble float to the surface and escapes, can also make the gas invade the drilling fluid and collides with the lower part of blade or the inner wall of vacuum tank, and bubble wherein receives the striking and is broken, makes the gas escape in the bubble to improve degassing effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention; fig. 2 is an enlarged view of a portion i of fig. 1.

Detailed Description

To make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as the upper and lower … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Moreover, the technical solutions of the present invention between the various embodiments can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are combined and contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and the present invention is not within the protection scope of the present invention.

A centrifugal vacuum deaerator is shown in figure 1 and comprises a base 1, wherein a vacuum tank 2, a steam-water separator 3 and a vacuum pumping system 4 are respectively arranged on the base 1, a motor 5 is arranged on the vacuum tank 2, a vertical rotating shaft 6 is arranged at the upper part in the vacuum tank 2, the motor 5 is connected with the rotating shaft 6 through a transmission device, a liquid inlet pipe 7 is arranged on the vacuum tank 2, the upper part of the liquid inlet pipe 7 penetrates through the middle part in the vacuum tank 2 and is communicated with the vacuum tank 2, the bottom of the vacuum tank 2 is communicated with a liquid discharge pipe 8, an air suction pipe 9 is communicated between the upper part of the vacuum tank 2 and the steam-water separator 3 and the vacuum pumping system 4, the lower part of the rotating shaft 6 is hollow, a plurality of hollow blades 10 are arranged and communicated on the periphery of the lower part of the rotating shaft 6, the blades 10 are. The vacuum pumping system 4 is the existing vacuum pumping device, the vacuum pumping system 4 can pump the vacuum tank 2 vacuum through the exhaust pipe 9 and keep the vacuum state, by utilizing the negative pressure principle, the size of the bubbles in the gas-invaded drilling fluid can be increased, the bubbles can obtain larger buoyancy, the bubbles can float to the liquid surface more quickly, the separation process of the bubbles is accelerated, the bubbles can float to the surface to escape, the gas-invaded drilling fluid can also enter the vacuum tank 2 through the liquid inlet pipe 7, the motor 5 drives the rotating shaft 6 to rotate, the gas-invaded drilling fluid enters the blades 10 through the rotating shaft 6 in the rotation process of the rotating shaft 6 and is acted by centrifugal force, is sprayed outward through the through-holes 11 of the vane 10, collides with the lower portion of the vane 10 or the inner wall of the vacuum tank 2, the bubbles therein are broken by the impact, so that the gas in the bubbles escapes, the escaped gas is pumped out by the pumping pipe 9, and the drilling fluid flows out through the drain pipe 8. The structure utilizes the negative pressure principle, can increase the size of bubbles in the gas-invasion drilling fluid, enables the bubbles to obtain larger buoyancy, enables the bubbles to float to the liquid surface more quickly, accelerates the separation process of the bubbles, enables the bubbles to float to the surface and escape, and can also enable the gas-invasion drilling fluid to collide with the lower part of the blade 10 or the inner wall of the vacuum tank 2, wherein the bubbles are impacted and broken, so that the gas in the bubbles escapes, thereby improving the degassing effect. The blade 10 can increase the centrifugal force that the drilling fluid was invaded to gas, improves the velocity of flow that the drilling fluid was invaded to the gas that erupts, promotes collision effect, still invades the drilling fluid collision with gas through the lower part of blade 10, has improved the collision area that the drilling fluid was invaded to gas, further promotes collision effect.

The inner wall of the middle part of the vacuum tank 2 is provided with an annular liquid guide plate 12 on the periphery. The drain board 12 can make the drilling fluid that flows down along the inner wall of vacuum tank 2 flow down through the drain board 12, and the in-process that flows, drilling fluid expand on the drain board 12 and become the thin-layer torrent flow, has shortened the displacement distance that the bubble reaches the drilling fluid surface to the separation process of bubble has been accelerated, makes the bubble float to the surface and escapes, thereby further improves degassing effect.

The liquid guide plate 12 is obliquely arranged, and the included angle between the liquid guide plate 12 and the horizontal direction is 60 degrees. The structure can increase the stroke of the drilling fluid, so that bubbles can be separated from the drilling fluid on the liquid guide plate 12, and the drilling fluid can be prevented from forming accumulated liquid on the liquid guide plate 12.

The lower part of the rotating shaft 6 is communicated with a conical air guide sleeve 13, and the air guide sleeve 13 is positioned in the liquid inlet pipe 7. The fairings 13 increase the amount of gas-invaded drilling fluid entering the rotor shaft 6, allowing more gas-invaded drilling fluid to enter the blades 10.

The upper part of the rotating shaft 6 is provided with an arc-shaped fixed cover 14, and the fixed cover 14 is positioned above the blade 10. The structure can lead the fixed cover 14 to block the drilling fluid sprayed by the blade 10 at the uppermost layer, lead the drilling fluid to collide with the fixed cover 14 and improve the degassing effect.

As shown in fig. 2, the through hole 11 is in a laval nozzle shape, the large diameter end of the through hole 11 is located on the outer wall of the blade 10, and the small diameter end of the through hole 11 is located on the inner wall of the blade 10. The laval nozzle-shaped through hole 11 can not only accelerate the passing drilling fluid, but also enlarge the jetting angle of the drilling fluid when the drilling fluid leaves the through hole 11, so that the drilling fluid is dispersed into particles with smaller volume, and the exhaust is facilitated.

The technical contents not described in detail in the present invention are all known techniques. The above is only the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above-mentioned embodiments, all belong to the technical solution of the present invention under the thought all belong to the protection scope of the present invention, it should be pointed out, to the ordinary skilled person in the present technical field, not deviating from the present invention discloses a plurality of improvements and decorations, these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. Centrifugal vacuum degasser, its characterized in that: comprises a base (1), vacuum tanks (2) are respectively arranged on the base (1), catch water (3) and vacuum pumping system (4), set up motor (5) on vacuum tank (2), upper portion in vacuum tank (2) sets up vertical pivot (6), motor (5) are connected with pivot (6) through transmission, set up feed liquor pipe (7) on vacuum tank (2), the upper portion of feed liquor pipe (7) penetrates the middle part in vacuum tank (2) and communicates with each other with vacuum tank (2), the bottom intercommunication fluid-discharge tube (8) of vacuum tank (2), communicate exhaust tube (9) between the upper portion of vacuum tank (2) and catch water (3) and vacuum pumping system (4), pivot (6) lower part cavity, pivot (6) lower part periphery installation and the hollow blade (10) of intercommunication several, blade (10) are located the top of feed liquor pipe (7), several through-hole (11) are seted up to the upper portion of blade (10).

2. The centrifugal vacuum deaerator of claim 1 wherein: the inner wall periphery of the middle part of the vacuum tank (2) is provided with an annular liquid guide plate (12).

3. The centrifugal vacuum deaerator of claim 2 wherein: the liquid guide plate (12) is obliquely arranged, and the included angle between the liquid guide plate (12) and the horizontal direction is 60 degrees.

4. The centrifugal vacuum deaerator of claim 1 wherein: the lower part of the rotating shaft (6) is communicated with a conical flow guide cover (13), and the flow guide cover (13) is positioned in the liquid inlet pipe (7).

5. The centrifugal vacuum deaerator of claim 1 wherein: the upper part of the rotating shaft (6) is provided with an arc-shaped fixed cover (14), and the fixed cover (14) is positioned above the blades (10).

6. The centrifugal vacuum degasser of any of claims 1 to 5, further comprising: the through hole (11) is in a Laval nozzle shape, the large-diameter end of the through hole (11) is positioned on the outer wall of the blade (10), and the small-diameter end of the through hole (11) is positioned on the inner wall of the blade (10).