CN212348372U - Foam generating device for petroleum drilling and well cementation operation - Google Patents
Foam generating device for petroleum drilling and well cementation operation Download PDFInfo
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- CN212348372U CN212348372U CN202021532086.XU CN202021532086U CN212348372U CN 212348372 U CN212348372 U CN 212348372U CN 202021532086 U CN202021532086 U CN 202021532086U CN 212348372 U CN212348372 U CN 212348372U
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Abstract
The utility model provides a foam generating device of oil drilling well cementation operation, one-level blender liquid outlet and second grade blender inlet intercommunication, one-level blender inlet and well cementation car pump body intercommunication, the device intercommunication is added with liquid to the one-level blender, and second grade blender inlet and nitrogen gas generating device intercommunication all are equipped with the homomixer on one-level blender and the second grade blender, and the one-level blender structure is: the first mixing cavity is communicated with a first diffusion pipe, the first diffusion pipe is communicated with a bent pipe, the bent pipe is communicated with a first uniform mixer, the first uniform mixer is communicated with a second-stage mixer, and solid, liquid and gaseous flow-phase media are mixed by adopting a Venturi jet mixing principle, a turbulent mixing principle and a shearing mixing principle to form foam cement slurry with stable density and uniform mixing.
Description
Technical Field
The utility model relates to an oil drilling and production well cementation operation equipment field, in particular to foam generating device who is applicable to an oil drilling and production well cementation operation of low density well cementation operation.
Background
With the continuous increase of shale gas development strength, the current well cementation operation has the characteristics of long horizontal section and inclined well section, the problems of eccentricity of a casing pipe, easy leakage at low pressure and the like are increasingly prominent, and higher requirements are put forward on low-density cement slurry in well cementation construction. The foam cement slurry well cementation technology can realize the preparation of low-density cement slurry, improve the problems of easy-to-leak stratum well leakage, reduce the eccentricity of a casing pipe and the like, and is popularized and applied abroad.
Foam cement slurry cementing systems from Harinbington, BJ, etc. represent an advanced level of foam cementing. The matched cement paste preparation system, the computer control system and the matched construction process are industrially applied on site. At present, the foam slurry mixing equipment is relatively lagged behind in the aspect in China and is lack of reliable foam slurry mixing equipment. The foam generating device is a core component for foam cementing.
Chinese patent CN 105418155 a "foam generator for foam cement slurry cementing" discloses a foam generator for foam cement slurry cementing, which comprises a cement slurry injection component, the cement slurry injection component has a feed inlet along the axial direction; the nitrogen injection assembly comprises a radial gas inlet and a premixing cavity which is communicated with the gas inlet and the feed inlet and is arranged along the axial direction; and a homogenizer assembly. Wherein, an air distribution cylinder comprising a sonic nozzle is arranged on the inner wall of the premixing cavity. The axis body of the structure of homogenizer subassembly is bigger, leads to whole foaming structure trafficability characteristic poor, and cement thick liquid still need mix with the additive outward again with nitrogen gas mixture, mixing apparatus dispersion, and trafficability characteristic is poor.
Chinese patent CN 109397538A 'a foam cement slurry generator, a cement slurry pressurized inflation device and application thereof' provides a foam generator which can be used for preparing foam cement slurry for oil-gas well cementation, a cement slurry pressurized inflation device based on the foam generator and application thereof. The distance between this structure mixing cavity and the spiral piece is less, and known mixing cavity is same cavity with spiral set in the picture, and high-pressure nitrogen gas directly blows off foam cement thick liquid, leads to foam cement thick liquid can't enter into the inside cavity of spiral set, as long as the foam cement thick liquid velocity of flow is too big, and the foaming effect is extremely poor, leads to foam production extremely poor.
Chinese patent CN 204252939U, "a pressure type well cementation foam cement generating device", provides a pressure type well cementation foam cement generating device. The mixer is internally provided with a foam mixing chamber, a throat pipe and a nozzle which are mutually communicated, the throat pipe is communicated with a nitrogen inlet in the vertical direction, flow control valves are respectively arranged at two ends of a cement slurry inlet and the nitrogen inlet of the mixer, a sealing gasket is arranged at the contact part of the mixer and the flow control valves, a reducing joint assembly is connected with the mixer by a fan-shaped check ring, a wing nut and a spring retainer ring, and a mixed liquid discharge port is communicated with the foam mixing chamber through the reducing joint assembly. Without a mixing device, the mixing effect is mixed substantially by pressure, resulting in a situation where cement foam is packed out.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a foam generating device of oil drilling well cementation operation, when solving the foam well cementation operation, foam cement thick liquid density is unstable, the inhomogeneous problem of bubble distribution.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a foam generating device for oil drilling and production well cementation operation is characterized in that a liquid outlet of a first-stage mixer is communicated with a liquid inlet of a second-stage mixer, a liquid inlet of the first-stage mixer is communicated with a pump body of a well cementation vehicle, the first-stage mixer is communicated with a liquid adding device, the liquid inlet of the second-stage mixer is communicated with a nitrogen generating device, and uniform mixers are arranged on the first-stage mixer and the second-stage mixer.
In the preferred scheme, the structure of the first-stage mixer is as follows: the first mixing cavity is communicated with a first diffusion pipe, the first diffusion pipe is communicated with a bent pipe, the bent pipe is communicated with a first uniform mixer, and the first uniform mixer is communicated with a second-stage mixer.
In a preferred scheme, the structure of the secondary mixer is as follows: the second mixing chamber is communicated with the first homomixer, one end of the second mixing chamber is communicated with the nitrogen generating device, the other end of the second mixing chamber is communicated with a second diffusion pipe, and the second diffusion pipe is communicated with the second homomixer.
In the preferred scheme, one end of the first mixing cavity is provided with a first nozzle which is communicated with a pump body of the well cementation vehicle, one side of the first mixing cavity is provided with an additive inlet, and the additive inlet is communicated with a liquid adding device;
the first nozzle is locked at the liquid inlet of the first mixing cavity through a plurality of locking nuts.
In the preferred scheme, the end part of the first nozzle extends into the first mixing cavity, the end part is arranged at the position of an additive inlet, and the end part of the first nozzle is of a conical structure;
the first nozzle sprays the cement-based slurry, so that the liquid additive is sucked from the additive inlet under the negative pressure inside the first mixing cavity, and the high-pressure cement-based slurry is mixed with the liquid additive through high-speed shearing.
In the preferred scheme, the inside of the first diffusion pipe is communicated with the first mixing cavity through a thin pipe, the pipe diameter of the pipeline in the first diffusion pipe is larger as the pipe diameter is farther away from the first mixing cavity, the first diffusion pipe is in threaded connection with the first mixing cavity, and the outside of the first diffusion pipe is clamped through a locking ring;
the first diffusion pipe is clamped with the bent pipe or the first uniform mixer through a clamping seat.
In the preferred scheme, first diffuser pipe end and first mixing chamber threaded connection, locking ring and first diffuser pipe end threaded connection, the locking ring supports and leans on first mixing chamber terminal surface.
In the preferred scheme, the end part of the second diffusion pipe is clamped with the second uniform mixer through a clamping seat;
the end part of the second uniform mixer is provided with a clamping ring, the end part of the clamping ring is abutted against a boss of the second uniform mixer and is in threaded connection with the second uniform mixer, the inner part of one end of the clamping seat is clamped on the boss of the clamping ring for limiting, the other end of the clamping seat is in threaded connection with a second diffusion pipe, and a sealing gasket is arranged between the second uniform mixer and the second diffusion pipe.
In the preferred scheme, the first uniform mixer comprises a cylinder body, a stirring shaft is arranged in the cylinder body, a plurality of stirring blades which are spirally distributed are arranged on the periphery of the stirring shaft, glands are arranged at two ends of the cylinder body, the stirring shaft is rotatably connected with the glands, and a plurality of through holes are formed in the glands.
The utility model provides a foam generating device of oil drilling well cementation operation, the device mainly adopt venturi to spray mixing principle, turbulent flow mixing principle and shearing mixing principle, mix these three kinds of flow phase media of solid-state, liquid and gaseous state, form the foam cement thick liquid of stable, misce bene of density, the beneficial effects of the utility model are that:
1. the utility model adopts a structure that the nozzle can be quickly disassembled and assembled, and is suitable for mixing the foam cement slurry with different densities and flows;
2. the utility model adopts the uniform mixer to shear and mix the flowing-through medium again, thereby improving the uniformity of the medium;
3. the utility model discloses a mode that the second grade mixes, and each grade mixes and all contains the homomixer, further shears, mixes liquid, ensures to mix more evenly, mixed liquid density is more stable, simple structure, and convenient to use is fit for using widely.
Drawings
The invention will be further explained with reference to the following figures and examples:
FIG. 1 is a general block diagram of the present invention;
FIG. 2 is a connection structure diagram of parts at various positions of the present invention;
FIG. 3 is a front sectional view of the structure of the present invention;
FIG. 4 is a view of the nozzle, mixing chamber and diffuser mounting structure of the present invention;
FIG. 5 is a structural view of the installation of the homomixer, the mixing chamber and the diffusion tube of the present invention;
FIG. 6 is a structural diagram of the homomixer of the present invention;
in the figure: a first-stage mixer 1; a secondary mixer 2; a first nozzle 3; a lock nut 301; a first mixing chamber 4; an additive inlet 5; a first diffusion pipe 6; a card holder 7; a bent pipe 8; a second mixing chamber 9; a second diffusion pipe 10; a first homomixer 11; a second homomixer 12; a gland 1201; a stirring blade 1202; a stirring shaft 1203; an outlet 13; a second nozzle 14; a locking ring 15; a cementing truck 16; a liquid adding device 17; a nitrogen generating device 18; a flow meter 19; an electrically operated valve 20; a pressure gauge 21; a snap ring 22.
Detailed Description
Example 1
As shown in figures 1-6, the liquid outlet of a first-stage mixer 1 is communicated with the liquid inlet of a second-stage mixer 2, the liquid inlet of the first-stage mixer 1 is communicated with a pump body of a well cementing truck 16, the first-stage mixer 1 is communicated with a liquid adding device 17, the liquid inlet of the second-stage mixer 2 is communicated with a nitrogen generating device 18, and the first-stage mixer 1 and the second-stage mixer 2 are both provided with a uniform mixer. By the structure, the homogenizing mixer plays a role in further shearing and mixing the mixed liquid, so that the mixing time is greatly prolonged, the mixing is more uniform, and the density of the mixed liquid is more stable.
In the preferred scheme, the structure of the first-stage mixer 1 is as follows: the first mixing cavity 4 is communicated with a first diffusion pipe 6, the first diffusion pipe 6 is communicated through an elbow pipe 8, the elbow pipe 8 is communicated with a first homomixer 11, and the first homomixer 11 is communicated with the second-stage mixer 2. According to the structure, the first-stage mixer 1 and the second-stage mixer 2 are arranged, the discharge port of the first-stage mixer 1 is connected with the suction port of the second-stage mixer 2, during well cementation construction, high-pressure cement-based slurry discharged by a well cementation vehicle 16 and a liquid additive pumped by a liquid adding device are mixed in the first mixing cavity 4 for the first time, and then nitrogen provided by a nitrogen generating device and cement slurry containing the liquid additive mixed by the second mixing cavity 9 are mixed and foamed in the second mixing cavity 9, so that foam cement slurry with stable density is formed.
In a preferred scheme, the structure of the secondary mixer 2 is as follows: the second mixing chamber 9 is communicated with the first homomixer 11, one end of the second mixing chamber 9 is communicated with the nitrogen generating device 18, the other end is communicated with the second diffusion pipe 10, and the second diffusion pipe 10 is communicated with the second homomixer 12. With the structure, the nitrogen provided by the nitrogen generator and the cement slurry containing the liquid additive mixed by the second mixing cavity 9 are mixed and foamed in the second mixing cavity 9, so that the foam cement slurry with stable density is formed.
In the preferred scheme, first mixing chamber 4 one end are equipped with first nozzle 3, first nozzle 3 and the 16 pump bodies of well cementation car intercommunication, first mixing chamber 4 one side is equipped with additive entry 5, and additive entry 5 and liquid add device 17 intercommunication, but structure from this, but first nozzle 3 and second nozzle 14 all adopt quick assembly disassembly structure to carry out the mixing of the foam cement thick liquid of different density, flow.
The high-pressure cement-based slurry discharged by the well cementation vehicle 16 is injected from the first nozzle 3 in the first-stage mixer 1 to form high-pressure jet flow, negative pressure is formed inside the first mixing cavity 4, under the action of the negative pressure, the liquid additive pumped out by the liquid adding device 17 is sucked into the first mixing cavity 4 from the additive inlet 5 of the first mixing cavity 4, then the high-pressure cement-based slurry injected from the first nozzle 3 is sheared at high speed to play a mixing role, then the mixed liquid of the cement-based slurry and the liquid additive passes through the first diffusion pipe 6 with the gradually increased diameter to further generate turbulent mixing, and then the mixed liquid of the cement-based slurry and the liquid additive passes through the first homomixer 11 to be further sheared and mixed.
The first nozzle 3 is locked at the liquid inlet of the first mixing chamber 4 by a plurality of locking nuts 301. According to the structure, a structure capable of being quickly assembled and disassembled is adopted, so that the foam cement paste with different densities and flows can be mixed.
In the preferred scheme, 3 tip of first nozzle stretch into first mixing chamber 4 inside, and the tip is established in additive entry 5 positions, and 3 tip of first nozzle are the toper structure, and this structure, the tip is established and can be made inside formation negative pressure of first mixing chamber 4 in additive entry 5 positions, and is also convenient for liquid additive to flow into 3 opening positions of first nozzle and cut, mix in the toper structure.
The first nozzle 3 jets the cement-based slurry so that the liquid additive is sucked from the additive inlet 5 by negative pressure inside the first mixing chamber 4, and the high-pressure cement-based slurry is mixed with the liquid additive by high-speed shearing.
In the preferred scheme, the inside of the first diffusion pipe 6 is communicated with the first mixing chamber 4 through a thin pipe, the pipe diameter of the pipeline inside the first diffusion pipe 6 is larger as the pipe diameter is farther away from the first mixing chamber 4, the first diffusion pipe 6 is in threaded connection with the first mixing chamber 4, the outside of the first diffusion pipe is clamped through a locking ring 15, and the first diffusion pipe 6 is clamped with the bent pipe 8 or the first uniform mixer 11 through a clamping seat 7. With the structure, the mixed liquid of the cement-based slurry and the liquid additive passes through the first diffusion pipe 6 with the gradually increased diameter to further generate turbulent mixing, and then the mixed liquid of the cement-based slurry and the liquid additive passes through the first homomixer 11 to be further sheared and mixed.
In a preferable scheme, the end part of the first diffusion pipe 6 is in threaded connection with the first mixing chamber 4, the locking ring 15 is in threaded connection with the end part of the first diffusion pipe 6, and the locking ring 15 abuts against the end surface of the first mixing chamber 4. With this structure, the locking ring 15 functions to fix the first diffuser 6 and prevent the first diffuser 6 from coming loose due to resonance.
In the preferred scheme, the end part of the second diffusion pipe 10 is connected with the second uniform mixer 12 in a clamping manner through a clamping seat 7, a clamping ring 22 is arranged at the end part of the second uniform mixer 12, the end part of the clamping ring 22 is abutted against a boss of the second uniform mixer 12 and is in threaded connection with the second uniform mixer 12, the inner part of one end of the clamping seat 7 is clamped on the boss of the clamping ring 22 for limitation, the other end of the clamping seat is in threaded connection with the second diffusion pipe 10, and a sealing gasket is arranged between the second uniform mixer 12 and the second diffusion pipe 10. By the structure, the clamping ring 22 and the clamping seat 7 are matched and locked with the second uniform mixer 12 and the second diffusion tube 10, the connection structure is simple, the disassembly is convenient, and the sealing gasket plays a sealing role.
In the preferred scheme, the first homomixer 11 comprises a cylinder body, a stirring shaft 1203 is arranged in the cylinder body, a plurality of stirring blades 1202 which are spirally distributed are arranged on the periphery of the stirring shaft 1203, glands 1201 are arranged at two ends of the cylinder body, the stirring shaft 1203 is rotatably connected with the glands 1201, and a plurality of through holes are formed in the glands 1201. According to the structure, the stirring blade 1202 and the stirring shaft 1203 are welded together, the stirring blade 1202 and the stirring shaft 1203 can rotate selectively along the axial direction, two glands 1201 are respectively arranged at two ends of the pipeline, the two glands 1201 ensure that the stirring shaft 1203 welded with the stirring blade 1202 cannot move along the axial direction, and mixed liquid is continuously sheared by the stirring blade 1202 in the flow homomixer so as to be mixed again.
Example 2
Further described with reference to embodiment 1, as shown in fig. 1 to 6, a pump body of the well cementation vehicle 16 is communicated with a first mixing chamber 4 of an electric valve 20 through a flow meter 19, high-pressure cement-based slurry discharged from the well cementation vehicle 16 after the electric valve 20 is opened is injected from a first nozzle 3 in the first mixing chamber 4 to form high-pressure jet flow, and negative pressure is formed inside the first nozzle 3.
The liquid adding device 17 opens the electric valve 20, and the pumped liquid additive is sucked into the first mixing cavity 4 from the additive inlet 5 of the first mixing cavity 4 under the action of negative pressure, and then is sheared at high speed by the high-pressure cement-based slurry injected from the first mixing cavity 4 to play a mixing role.
The mixed liquid of the cement-based slurry and the liquid additive passes through the first diffusion pipe 6 with the diameter gradually increased to further generate turbulent mixing, and then the mixed liquid of the cement-based slurry and the liquid additive passes through the first homomixer 11 to be further sheared and mixed.
The nitrogen generating device 18 opens the electric valve 20, provides nitrogen to be injected from the second nozzle 14 in the second mixing chamber 9 to form high-pressure jet flow, forms negative pressure in the second mixing chamber 9, and under the action of the negative pressure, the mixed liquid of the cement-based slurry and the liquid additive mixed by the primary mixer 1 is sucked into the second mixing chamber 9 from the suction inlet of the secondary mixer 2, and then is sheared at high speed by the high-pressure nitrogen injected from the second nozzle 14 to play a role in mixing.
Then the mixed liquid of the liquid additive and the cement-based slurry mixed with the nitrogen passes through the second diffusion pipe 10 with the diameter gradually enlarged to generate turbulent mixing, and then the mixed liquid of the liquid additive and the cement-based slurry mixed with the nitrogen passes through the second homomixer 12 to be further sheared and mixed, so that the foam cement slurry with stable and uniform density is formed.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (10)
1. A foam generating device for petroleum drilling and well cementation operation is characterized in that: the liquid outlet of the first-stage mixer (1) is communicated with the liquid inlet of the second-stage mixer (2), the liquid inlet of the first-stage mixer (1) is communicated with the pump body of the well cementing truck (16), the first-stage mixer (1) is communicated with the liquid adding device (17), the liquid inlet of the second-stage mixer (2) is communicated with the nitrogen generating device (18), and the first-stage mixer (1) and the second-stage mixer (2) are both provided with uniform mixers.
2. The foam generating device for oil drilling and cementing operation as claimed in claim 1, wherein: the structure of the first-stage mixer (1) is as follows: the first mixing cavity (4) is communicated with the first diffusion pipe (6), the first diffusion pipe (6) is communicated through the bent pipe (8), the bent pipe (8) is communicated with the first uniform mixer (11), and the first uniform mixer (11) is communicated with the second-stage mixer (2).
3. The foam generating device for oil drilling and cementing operation as claimed in claim 2, wherein: the structure of the second-stage mixer (2) is as follows: the second mixing cavity (9) is communicated with the first homomixer (11), one end of the second mixing cavity (9) is communicated with the nitrogen generating device (18), the other end of the second mixing cavity is communicated with the second diffusion pipe (10), and the second diffusion pipe (10) is communicated with the second homomixer (12).
4. The foam generating device for oil drilling and cementing operation as claimed in claim 2, wherein: the device comprises a first mixing cavity (4), wherein one end of the first mixing cavity (4) is provided with a first nozzle (3), the first nozzle (3) is communicated with a pump body of a well cementation vehicle (16), one side of the first mixing cavity (4) is provided with an additive inlet (5), and the additive inlet (5) is communicated with a liquid adding device (17);
the first nozzle (3) is locked at the liquid inlet of the first mixing cavity (4) through a plurality of locking nuts (301).
5. The foam generating device for oil drilling and cementing operation as claimed in claim 4, wherein: the end part of the first nozzle (3) extends into the first mixing cavity (4), the end part is arranged at the position of the additive inlet (5), and the end part of the first nozzle (3) is of a conical structure;
the first nozzle (3) sprays cement-based slurry, so that the liquid additive is sucked from the additive inlet (5) under the negative pressure inside the first mixing cavity (4), and the high-pressure cement-based slurry is mixed with the liquid additive in a high-speed shearing manner.
6. The foam generating device for oil drilling and cementing operation as claimed in claim 2, wherein: the inner part of the first diffusion pipe (6) is communicated with the first mixing cavity (4) through a thin pipe, the pipe diameter of the pipeline in the first diffusion pipe (6) is larger as the pipe diameter is farther away from the first mixing cavity (4), the first diffusion pipe (6) is in threaded connection with the first mixing cavity (4), and the outer part of the first diffusion pipe is clamped through a locking ring (15);
the first diffusion pipe (6) is clamped with the bent pipe (8) or the first uniform mixer (11) through a clamping seat (7).
7. The foam generating device for oil drilling and cementing operation as claimed in claim 6, wherein: the end part of the first diffusion pipe (6) is in threaded connection with the first mixing cavity (4), the locking ring (15) is in threaded connection with the end part of the first diffusion pipe (6), and the locking ring (15) abuts against the end face of the first mixing cavity (4).
8. The foam generating device for oil drilling and cementing operation as claimed in claim 3, wherein: the end part of the second diffusion pipe (10) is clamped with the second uniform mixer (12) through a clamping seat (7).
9. The foam generating device for oil drilling and cementing operation as claimed in claim 8, wherein: the end part of the second uniform mixer (12) is provided with a clamping ring (22), the end part of the clamping ring (22) is abutted against a boss of the second uniform mixer (12) and is in threaded connection with the second uniform mixer (12), the inner part of one end of the clamping seat (7) is clamped on the boss of the clamping ring (22) for limitation, the other end of the clamping seat is in threaded connection with the second diffusion tube (10), and a sealing gasket is arranged between the second uniform mixer (12) and the second diffusion tube (10).
10. The foam generating device for oil drilling and cementing operation as claimed in claim 2, wherein: the first homomixer (11) comprises a cylinder body, wherein a stirring shaft (1203) is arranged inside the cylinder body, a plurality of stirring blades (1202) which are spirally distributed are arranged on the periphery of the stirring shaft (1203), glands (1201) are arranged at two ends of the cylinder body, the stirring shaft (1203) is rotatably connected with the glands (1201), and a plurality of through holes are formed in the glands (1201).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021532086.XU CN212348372U (en) | 2020-07-29 | 2020-07-29 | Foam generating device for petroleum drilling and well cementation operation |
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| CN202021532086.XU CN212348372U (en) | 2020-07-29 | 2020-07-29 | Foam generating device for petroleum drilling and well cementation operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111888960A (en) * | 2020-07-29 | 2020-11-06 | 中石化四机石油机械有限公司 | Foam generating device for petroleum drilling and production well cementation operation and foaming method thereof |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111888960A (en) * | 2020-07-29 | 2020-11-06 | 中石化四机石油机械有限公司 | Foam generating device for petroleum drilling and production well cementation operation and foaming method thereof |
| CN111888960B (en) * | 2020-07-29 | 2024-07-09 | 中石化四机石油机械有限公司 | Foam generating device and foam generating method for petroleum drilling and cementing operation |
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