CN210152633U - Water-hose vortex water-drainage gas-production device - Google Patents
Water-hose vortex water-drainage gas-production device Download PDFInfo
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- CN210152633U CN210152633U CN201920957895.6U CN201920957895U CN210152633U CN 210152633 U CN210152633 U CN 210152633U CN 201920957895 U CN201920957895 U CN 201920957895U CN 210152633 U CN210152633 U CN 210152633U
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Abstract
The utility model discloses a water tornado vortex drainage gas production device, including acceleration portion and inflow portion, acceleration portion is the body of revolution that the cross section is crescent, and inflow portion is hollow cylinder, and the one end of inflow portion is connected with the main aspects of acceleration portion, and inflow portion has evenly seted up a plurality of fluid entry along its circumference at the lateral wall, and the fluid entry communicates with the inner chamber of inflow portion, and the inner wall of inflow portion all is provided with guide vane in the both sides of every fluid entry, and the inflow portion is at the outer tangent line of guide vane and inflow portion connecting portion and the contained angle of guide vane is the acute angle; the inclination directions of all the guide blades in the inner cavity of the inflow part are the same; the center of the other end of the inflow part is provided with a fluid outlet. The device is used for water drainage and gas production, so that gas-liquid separation is realized, the slippage loss generated in the gas migration process is greatly reduced, the bottom accumulated liquid is continuously pumped out of the bottom of the well due to the specific pumping capacity of the wind field, the stable production time of the gas well is greatly prolonged, and the liquid drainage capacity of the gas well is improved.
Description
Technical Field
The utility model relates to a petroleum engineering field, concretely relates to water tornado vortex drainage gas production device.
Background
When the pressure of the gas reservoir is gradually reduced, the flow rate of the gas is also gradually reduced, and when the energy of the natural gas is insufficient to carry the liquid out, the liquid is gradually condensed and agglomerated, and gradually flows back to the bottom of the well under the action of gravity to form accumulated liquid. Once the bottom hole liquid is generated, the gas energy is consumed at the bottom hole due to the slippage loss of the gas in the bottom hole moving process, and therefore, the gas well is finally pressed down due to the fact that the height of the bottom hole liquid section is increased. Therefore, for a gas well, in order to increase the gas production rate and the production stabilizing time as much as possible, the accumulated liquid at the bottom of the well should be taken out of the well in time. The traditional drainage gas production mode comprises the following steps: foam drainage gas production process, gas lift drainage gas production process, electric submersible pump drainage gas production process, hydraulic jet pump drainage gas production process and velocity string drainage gas production process. In 2004, the united states department of energy developed a vortex tool for the problem of water drainage and gas production, and the tool was installed in a production string to separate gas from liquid, and convert the turbulent flow state of fluid in a shaft into spiral rising annular membrane-shaped flow, and the tool installed in the early stage of production can greatly reduce the energy loss of gas in the migration process, thereby carrying more liquid out of a wellhead. However, the drainage gas recovery processes are expensive, or require production stoppage and repeated construction, which undoubtedly increases the expenditure of oil fields and is not favorable for economic exploitation. And along with the decline of gas reservoir energy, when the gas velocity of flow reduced the bottom hole hydrops section and has lost a large amount of energy, installation vortex instrument also only died sheep and mended firmly, and its gas-liquid separation's effective working distance is shorter and shorter after producing the hydrops along with vortex instrument top liquid reflux for the effect of this instrument is progressively worse.
SUMMERY OF THE UTILITY MODEL
For solving the problem that exists among the prior art, the utility model aims to provide a water hose vortex drainage gas production device, the utility model relates to a green efficient drainage gas production device and drainage gas production method utilize the utility model provides a device and method can improve gas well drainage ability by a wide margin, improve the gas production ability of gas well.
The purpose of the utility model is realized by adopting the following technical scheme:
the water-cyclone vortex water drainage gas production device comprises an accelerating part and an inflow part, wherein the accelerating part is a revolving body with a gradually-increased cross section, the inflow part is a hollow cylinder, one end of the inflow part is connected with the large end of the accelerating part, the inflow part is uniformly provided with a plurality of fluid inlets on the side wall along the circumferential direction of the inflow part, the fluid inlets are communicated with the inner cavity of the inflow part, the inner wall of the inflow part is provided with guide blades on two sides of each fluid inlet, and the included angle between the outer tangent of the inflow part at the connecting part of the guide blades and the inflow part and the guide blades is an acute angle; the inclination directions of all the guide blades in the inner cavity of the inflow part are the same; the center of the other end of the inflow part is provided with a fluid outlet.
The angle of inclination of all guide blades in the inner cavity of the inflow part is the same, and the height of the guide blades is the same as that of the inner cavity of the inflow part.
The radius a of the fluid outlet and the height H of the inner cavity of the inflow part meet the following conditions:
of the guide vanes on both sides of each fluid inlet, the guide vane close to the axial line of the inflow part exactly intersects with the cylindrical surface of the fluid outlet, and has the length of L1, and the length of the other guide vane is L2, so that L1 and L2 satisfy the following relation:
6.5cm≤L2≤0.0L1。
the outer tangent of the inflow part at the connecting part of the guide vane and the inflow part forms an included angle of 45 degrees with the guide vane.
The guide vanes had a thickness of 2mm and the distance between the guide vanes on either side of each fluid inlet was 2.5 cm.
The accelerating part is in a shape of a truncated cone or a cone.
The accelerating part adopts a round platform structure with a smooth curve bus.
The diameter of the small end face of the accelerating part is 10cm, the diameter of the large end face is 20cm, and the height is 40 cm.
The end of the inflow is coaxially connected to a connecting pipe at the fluid outlet.
The utility model discloses following beneficial effect has:
the utility model discloses the acceleration portion of the vortex drainage gas production device of the water tornado is the body of revolution that the cross section is gradually increaseed, the one end of inflow portion is connected with the main aspects of acceleration portion, inflow portion has evenly seted up a plurality of fluid entry along its circumference at the lateral wall, fluid outlet has been seted up at the other end center of inflow portion, inflow portion has evenly seted up a plurality of fluid entry along its circumference at the lateral wall, fluid entry is communicated with the inner chamber of inflow portion, the inner wall of inflow portion all is provided with guide vane in each fluid entry's both sides, the inflow portion is at the outer tangent line of guide vane and inflow portion connecting portion and the contained angle of guide vane for the acute angle; the inclination directions of all the guide blades in the inner cavity of the inflow part are the same; in use, connecting the end of the production string to the fluid outlet; a production pipe column provided with a water hose vortex water drainage and gas production device is lowered into the bottom of the well, an annular space between the casing pipe and the production pipe column is sealed, and an annular space is formed between the inflow part and the casing pipe; because the accelerating part is a revolving body with the gradually-increased cross section, when the gas-liquid mixture flows to the part between the accelerating part and the sleeve, the flow speed of the gas-liquid mixture can be enhanced through the cavity casting with the variable cross section; when the gas-liquid mixture enters the inner cavity of the inflow part from the fluid inlet, the gas-liquid mixture can be guided by the guide vanes and then rotates to form vortex, the gas-liquid mixture forming the vortex can flow out from the fluid outlet, the liquid can be always spirally radiated and gathered on the outer ring of the tornado field in the gas-liquid mixture forming the vortex, the gas rises in the center of the tornado field in a rotating mode, and at the moment, gas-liquid two phases in the gas-liquid mixture are in a separation state. To sum up, the utility model discloses a water tornado vortex drainage gas production device can improve gas well flowing back ability by a wide margin, improves the gas production ability of gas well.
Furthermore, the accelerating part adopts a round table structure with a smooth curve bus, when the accelerating part is used, gas-liquid mixture in a reservoir near a production well flows to the accelerating part from the side surface of the accelerating part, and the accelerating part adopts the round table structure with the smooth curve bus, so that the gas-liquid mixture can be smoothly refluxed in time, the gas-liquid mixture is accelerated, and the corrosion of the gas-liquid mixture to the side surface is slowed down.
Furthermore, the end part of the inflow part is coaxially connected with a connecting pipe at the fluid outlet, and can be conveniently connected with a production pipe column through the connecting pipe.
Drawings
FIG. 1 is a schematic view of the vortex water drainage and gas production device of the present invention installed at the bottom of a well;
FIG. 2 is a schematic cross-sectional view of the inflow part of the vortex water-drainage gas-production device of the utility model;
FIG. 3 is a schematic view of the inlet of the vortex water drainage and gas recovery device of the present invention (the bottom of the inlet is not shown);
FIG. 4 is a view showing the internal structure of the water-cyclone vortex water-drainage gas production device (one end of the fluid outlet of the inflow part is not shown);
FIG. 5 is an overall structure view of the vortex water drainage gas production device of the utility model;
FIG. 6 is a perspective view of the whole structure of the vortex water drainage gas production device of the utility model;
fig. 7 is a diagram illustrating a positional relationship between inlet components according to the present invention.
In the figure, 1-casing, 2-setting device, 3-production tubing string, 3-convection zone, 5-inflow zone, 6-acceleration zone, 7-fluid inlet, 8-guide vane, 9-diversion chamber, 10-acceleration part, 11-inflow part, 12-end plate, 13-fluid outlet, 14-connecting pipe, 15-guide vane A, 16-guide vane B.
Detailed Description
The technical solution of the present invention is further specifically explained below with reference to the drawings and the embodiments, but the present invention is not limited to the embodiments listed below.
Referring to fig. 1 to 7, the vortex drainage gas production device of the water hose of the present invention includes an acceleration portion 10 and an inflow portion 11, the acceleration portion 10 is a revolving body with a gradually increasing cross section, the inflow portion 11 is a hollow cylinder, one end of the inflow portion 11 is connected with the large end of the acceleration portion 10, the inflow portion 11 is uniformly provided with a plurality of fluid inlets 7 on the side wall along the circumference, the fluid inlets 7 are communicated with the inner cavity of the inflow portion 11, the inner wall of the inflow portion 11 is provided with guide vanes 8 on both sides of each fluid inlet 7, and the included angle between the outer tangent line of the connection portion of the guide vanes 8 and the inflow portion 11 and the guide vanes 8 of the inflow portion 11 is an acute angle; the inclination direction of all guide blades 8 in the inner cavity of the inflow part 11 is the same; the other end of the inflow part 11 is centrally opened with a fluid outlet 13.
As a preferred embodiment of the invention, the inclination angles of all guide blades 8 in the interior of the inflow 11 are the same, and the height of the guide blades 8 is the same as the height of the interior of the inflow 11.
Referring to fig. 2 and 7, the angle θ between the outer tangent of the inlet portion 11 at the connecting portion between the guide vane 8 and the inlet portion 11 and the guide vane 8 is 45 °; the guide vanes 8 have a thickness of 2mm and the distance between the guide vanes 8 on either side of each fluid inlet 7 is 2.5 cm.
In a preferred embodiment of the present invention, the accelerating portion 10 has a truncated cone shape or a conical shape, and may have a solid structure or a hollow structure having a bottom surface.
Referring to fig. 1, 4 and 5, as a preferred embodiment of the present invention, the accelerating portion 10 has a circular truncated cone structure in which a generatrix is a smooth curve.
In a preferred embodiment of the present invention, the small end surface diameter of the acceleration part 10 is 10cm, the large end surface diameter is 20cm, and the height is 40 cm.
As a preferred embodiment of the present invention, the end of the inflow portion 11 is coaxially connected to a connection pipe 14 at a fluid outlet 13.
The utility model discloses water tornado vortex drainage gas production method adopts above-mentioned device, includes following step:
s1, installing and fixing the water-cyclone vortex water-drainage gas production device at the tail end of the production pipe column 3, and connecting the tail end of the production pipe column 3 with the fluid outlet 13;
s2, lowering the production pipe column 3 provided with the water hose vortex water drainage gas production device into the bottom of the well, plugging an annular space between the casing pipe 1 and the production pipe column 1 by using a packer, and forming an annular space between the inflow part 11 and the casing pipe 1;
and S3, opening the well and putting into production.
After the well is opened and put into production, in the process that a gas-liquid mixture rises along the casing 1, when the gas-liquid mixture flows to a position between the accelerating part 10 and the casing 1, the flow velocity of the gas-liquid mixture is enhanced and enters an annular space between the inflow part 11 and the casing 1, then the gas-liquid mixture enters from the fluid inlet 7 and is guided by the guide vanes 8, the gas-liquid mixture rotates to form a vortex, then the production pipe column 3 is used as a flow channel, the gas-liquid mixture is induced and spirally jetted in the inner cavity of the inflow part 11 and finally flows into the production pipe column 3, a hose is formed in the production pipe column 3, liquid near the bottom of the production well can be always spirally radiated and gathered on the outer ring of a hose wind field, the gas rises by approaching the center of the pipe column in a spiral jetting mode.
After the production pipe column 3 provided with the water hose vortex drainage gas production device is lowered to the bottom of the well, the height of the accelerating part 10 from a perforation hole or an open hole section of the production well is 1.5m-2 m.
The utility model discloses in the water tornado vortex drainage gas production method, the diameter of production tubular column 3 is the same with the diameter of fluid outlet 7, according to the diameter of production tubular column 3, designs the utility model discloses the length of 11 inner chamber height H of inflow portion, guide vane in the water tornado vortex drainage gas production device.
The utility model discloses to install the production tubular column 3 of the water tornado vortex drainage gas production device and go into the shaft bottom after, form between acceleration portion 10 and the sleeve pipe 1 and form between acceleration region 6, inflow portion 11 and the sleeve pipe 1 cyclic annular inflow district 5, form convection current district 4 in the production tubular column 3 on the inflow portion 11. At the accelerating area 6, the gas-liquid mixture flows upwards in the annular space between the accelerating part 10 and the casing 1, and the flow velocity of the gas-liquid mixture is enhanced to enter the inflow area 5 because the volume of the accelerating part 10 is gradually increased from bottom to top and the volume of the annular space is gradually reduced; in the inflow region 5, the inflow part 11 is a hollow cylinder and is provided with 6 guide chambers 9, the guide chambers 9 are chambers between two guide vanes on two sides of the same fluid inlet 7, the gas-liquid mixture fluid enters the guide chambers 9 after accelerating, and is guided by the guide vanes, and the gas-liquid mixture fluid rotates to form a vortex; the convection zone 5 takes the production string 3 as a flow channel, and the gas-liquid mixture flows into the production string 3 finally after induced rotational jetting in the inflow zone 5 to form a hose in the production string 3.
In the preferred embodiment of the present invention, in order to ensure that the single vortex hose is generated in the production string 3, the length of the guide vane and the height of the inflow region cylinder must be preferably designed according to the size of the production string 3, and the radius of the production string is a (same as the radius of the fluid inlet), so as to refer to fig. 7, the radius a of the fluid outlet 13 (the circle indicated by the dotted line in fig. 7) and the height H of the inner cavity of the inflow portion 11 satisfy the following conditions:
of the guide vanes on both sides of each fluid inlet 7, the guide vane close to the axis of the inflow part 11 exactly intersects the cylindrical surface where the fluid outlet 13 is located, and has a length of L1, and the other guide vane has a length of L2, so that L1 and L2 satisfy the following relationship:
6.5cm≤L2≤0.0L1。
the utility model discloses in the preferred scheme, when fixing the installation of the vortex drainage gas production device of water tornado at the end of production string 3, adopt the welding mode to connect, the welding method of adoption is carbon dioxide gas shielded arc welding.
The principle of the utility model is that: the device and the water drainage and gas production method provided by the utility model combine and utilize the wind field characteristics of the powerful gas-liquid separation capability and the extremely strong suction capability of the tornado field. The gas-liquid mixture at the bottom of the well forms vortex through the hose generating device, so that a hose is formed in a production pipe column close to the bottom of the well, liquid near the bottom of the well can be always subjected to rotational radiation and gather on the outer ring of a hose wind field, gas rises close to the center of the pipe column in a rotational radiation mode, and the gas and the liquid are basically in a separated state, so that the slippage loss of the gas in the migration process of a liquid accumulation section is greatly reduced, and the energy loss of the gas passing through the liquid accumulation section at the bottom of the well is greatly reduced; and the extremely strong bottom suction capacity of the hose enables the bottom hole accumulated liquid to be continuously sucked upwards, so that the gas well is prevented from being stopped by more and more bottom hole accumulated liquid killing wells, and the liquid discharge capacity of the gas well can be further improved by matching with a vortex tool in the middle and later periods of production.
When the vortex water drainage gas production device of the water hose works, the vortex water drainage gas production device of the water hose is installed and fixed at the tail end of the production pipe column, and the tail end of the production pipe column is connected with the fluid outlet; a production pipe column provided with a water hose vortex water drainage and gas production device is lowered into the bottom of the well, an annular space between the casing pipe and the production pipe column is sealed, and an annular space is formed between the inflow part and the casing pipe; later directly open the well and put into production can, by the aforesaid the utility model discloses the beneficial effect of water tornado vortex drainage gas production device can be known, the utility model discloses a water tornado vortex drainage gas production method can effectively separate the gas-liquid double-phase in the gas-liquid mixture, and gas well drainage capacity improves by a wide margin, and the gas production ability of gas well also correspondingly improves. In the early stage of production: the extremely strong suction effect of its bottom of hose reel, the gas-liquid separation ability of wind field has reduced energy loss greatly in addition for gas can in time carry more fluids and flow out the well head, has delayed the production of shaft bottom hydrops. In the later stage of production: the cyclone field enables gas-liquid separation to be in a vortex state all the time, energy loss of original gas passing through the liquid accumulation section is greatly reduced, influence of the liquid accumulation on gas production of a gas well is weakened as much as possible, and gas production capacity of the gas well is enhanced. The water-cyclone vortex drainage gas production device is arranged at the tail end of a well bottom production pipe column before production, well closing construction is not needed in the production process, the consumption of manpower and material resources in an oil field is greatly saved, and the water-cyclone vortex drainage gas production device is not influenced to be combined with other drainage gas production processes such as a foam drainage gas production process and a vortex tool for use. Compared with other traditional drainage gas production processes such as a foam drainage gas production process, an electric submersible pump drainage gas production process and the like, the water-cyclone vortex drainage gas production process is completely installed before production, the whole production process is completely automatic, other energy sources are not needed, the cost is very low, the economic benefit is good, the economic burden caused by well closing construction is avoided, and chemical products and equipment consumed by other traditional drainage gas production processes are saved.
Example 1
The diameter of an oil pipe of a B12 well in the date bay area of the Changqing oil field is 62mm, and the estimated gas production is 10000m3D, liquid production amount 7m3And d, well depth 1300 m.
The size of the water-cyclone vortex water-drainage gas production device is preferably designed according to the diameter of an oil pipe, the height of an inflow area is 12cm, the outer diameter is 10cm, the length of a guide vane is 8.5cm, and the thickness is 2 mm. The diameter of the small end face of the acceleration area is 10cm, the diameter of the large end face is 20cm, and the height is 40 cm. The whole device is welded at the tail end of the production pipe column by adopting gas shielded welding, and an annular space between the production pipe column and the sleeve is sealed by using an expansion type packer after the device is put into the well bottom. And putting into production after completion of well completion operation. Table 1 is the comparison of the liquid production capacity of the adjacent well and the B12 well, and it can be seen that the device and the drainage gas production method provided by the utility model significantly improve the liquid discharge capacity of the gas well.
TABLE 1
Example 2
The diameter of an oil pipe of a Scotrys gas field C2 well is 10.48mm, and the predicted gas production is 2500m3D, liquid production 4m3And d, well depth 12800 m.
The size of the water-cyclone vortex water-drainage gas production device is preferably designed according to the diameter of an oil pipe, the height of an inflow area is 20cm, the outer diameter is 10cm, the length of a guide vane is 6.5cm, and the thickness is 2 mm. The diameter of the small end face of the acceleration area is 10cm, the diameter of the large end face is 20cm, and the height is 40 cm. The whole device is welded at the tail end of the production pipe column by adopting gas shielded welding, and an annular space between the production pipe column and the sleeve is sealed by using an expansion type packer after the device is put into the well bottom. And putting into production after completion of well completion operation. Table 1 is the comparison of the liquid production volume of the adjacent well and the C2 well, and it can be seen that the liquid discharge capacity of the gas well is significantly improved by using the device and the water discharge gas production method provided by the utility model.
TABLE 2
To sum up, the utility model discloses utilize the superstrong gas-liquid separation ability of tornado field and suction ability to design out the device that can generate small-size tornado in the middle of the shaft bottom production string, utilize the device to carry out drainage gas production not only can make gas-liquid separation reduce the slippage loss that gas migration in-process produced greatly, its wind field peculiar suction ability makes the shaft bottom hydrops suction out the shaft bottom that is continuous moreover, has prolonged the steady production time of gas well greatly, has improved the flowing back ability of gas well.
Claims (10)
1. The water-cyclone vortex water drainage and gas production device is characterized by comprising an accelerating part (10) and an inflow part (11), wherein the accelerating part (10) is a revolving body with a gradually-increased cross section, the inflow part (11) is a hollow cylinder, one end of the inflow part (11) is connected with the large end of the accelerating part (10), the inflow part (11) is uniformly provided with a plurality of fluid inlets (7) on the side wall along the circumferential direction, the fluid inlets (7) are communicated with the inner cavity of the inflow part (11), the inner wall of the inflow part (11) is provided with guide vanes (8) on two sides of each fluid inlet (7), and the included angle between the outer tangent of the inflow part (11) at the connecting part of the guide vanes (8) and the inflow part (11) and the guide vanes (8) is an acute angle; the inclination directions of all the guide blades (8) in the inner cavity of the inflow part (11) are the same; the center of the other end of the inflow part (11) is provided with a fluid outlet (13).
2. A water-cyclone vortex water-draining gas-producing device according to claim 1, characterized in that the angle of inclination of all guide vanes (8) in the inner cavity of the inflow portion (11) is the same, and the height of the guide vanes (8) is the same as the height of the inner cavity of the inflow portion (11).
3. A water-cyclone vortex water-draining gas production device according to claim 1, characterized in that the radius a of the fluid outlet (13) and the height H of the inner cavity of the inflow part (11) satisfy the following condition:
4. a water-cyclone vortex water-draining gas production device according to claim 1, wherein, of the guide vanes on both sides of each fluid inlet (7), the guide vane near the axis of the inflow part (11) exactly intersects the cylindrical surface where the fluid outlet (13) is located, and the length of the guide vane is L1, and the length of the other guide vane is L2, then L1 and L2 satisfy the following relations:
6.5cm≤L2≤0.0L1。
5. a water-cyclone vortex water-draining gas-producing device according to claim 1, characterized in that the angle of the external tangent of the inflow portion (11) at the connection of the guide vane (8) and the inflow portion (11) to the guide vane (8) is 45 °.
6. A water-cyclone vortex water-drainage gas production device according to claim 1, characterized in that the thickness of the guide vanes (8) is 2mm and the distance between the guide vanes (8) on both sides of each fluid inlet (7) is 2.5 cm.
7. A water-cyclone vortex water-draining gas-producing device according to claim 1, characterized in that the large end surface of the accelerating part (10) has a diameter of 20cm and a height of 40 cm.
8. A water-cyclone vortex water-draining gas-producing device according to claim 1, characterized in that the accelerating part (10) is in the shape of a truncated cone, a cone or a truncated cone structure with a generatrix being a smooth curve.
9. The water-cyclone vortex water drainage gas production device according to claim 8, wherein when the accelerating part (10) is in the shape of a truncated cone or a truncated cone structure with a smooth curve as a generatrix, the small end surface of the accelerating part has a diameter of 10cm, the large end surface has a diameter of 20cm, and the height is 40 cm.
10. A water-cyclone vortex water-draining gas production device according to claim 1, characterized in that the end of the inflow (11) is coaxially connected with a connecting pipe (14) at the fluid outlet (13).
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| CN110159247A (en) * | 2019-06-24 | 2019-08-23 | 西安石油大学 | Waterspout vortex water drainage gas production device and method |
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