CN109138938B - Flow regulating and water controlling device, short joint, tubular column and secondary water controlling well completion method - Google Patents
Flow regulating and water controlling device, short joint, tubular column and secondary water controlling well completion method Download PDFInfo
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- CN109138938B CN109138938B CN201710508018.6A CN201710508018A CN109138938B CN 109138938 B CN109138938 B CN 109138938B CN 201710508018 A CN201710508018 A CN 201710508018A CN 109138938 B CN109138938 B CN 109138938B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
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Abstract
The invention provides a flow regulating and water controlling device, a short section, a tubular column and a secondary water controlling well completion method, wherein the flow regulating and water controlling device comprises a base tube, and an installation groove is arranged on the outer wall of the downstream end of the base tube; the rotational flow controller is arranged at the mounting groove; the protection cylinder is sleeved on the outer side of the base pipe, the protection cylinder and the base pipe form an annular cavity with a downstream end plugged, wherein after fluid enters the annular cavity, the fluid enters an inner cavity of the base pipe through the cyclone controller, the device can balance a horizontal well liquid production profile, delay the water line coning speed and achieve the purpose of oil stabilization and water control.
Description
Technical Field
The invention relates to the technical field of oil and gas well completion, in particular to a flow regulating and water controlling device, a short joint, a tubular column and a secondary water controlling well completion method.
Background
Compared with a conventional vertical well, the horizontal well increases the contact area between the shaft and an oil reservoir, and the single well yield is high. With the continuous progress of the horizontal well technology, the horizontal well is more and more applied to the production and development of oil reservoirs.
Along with the production development, because the horizontal shaft is long, the anisotropy of the anisotropism and permeability of reservoir rock and different oil-water interfacial tension lead to different outflow pressure differences of oil and water, the horizontal shaft is easy to produce a large amount of water due to edge bottom water coning, even the horizontal shaft is subjected to violent flooding, the life cycle of the horizontal well is shortened, and the extraction degree of a control area of the horizontal well and the single well recovery ratio are influenced.
In order to delay the coning speed of the water at the bottom of the horizontal well and prolong the waterless oil production period or the low-water-content oil production period of the horizontal well, the outflow speed of oil and water in the same horizontal well section is required to be balanced, or the liquid production profile of the whole horizontal well shaft is required to be balanced, so that the production speed of the water phase is inhibited, and the production of the oil phase is promoted.
In the prior art, the liquid production profile can be adjusted by injecting chemicals such as nitrogen, foam and the like, so as to inhibit the production of water. And the main water producing channel can be blocked by injecting physical methods such as selective blocking gel, selective blocking jelly glue, superfine cement and the like, so that the water production is reduced. The methods have certain effects on delaying the bottom water coning of the horizontal well, prolonging the production period of the oil well and improving the outflow profile, but have the defects of higher cost, multiple operations, damage to a reservoir layer by chemical agents and the like.
Therefore, the flow regulating and water controlling device needs to be invented to balance the liquid production profile of the horizontal well, delay the coning speed of the waterline and achieve the purpose of oil stabilization and water control.
Disclosure of Invention
Aiming at part or all of the technical problems in the prior art, the invention provides a flow regulating and water controlling device, a short joint, a tubular column and a secondary water controlling well completion method. The device is used for a horizontal well, can increase the flow resistance of fluid in the shaft entering a production pipe column of the shaft, thereby controlling the production speed of the fluid in a corresponding reservoir of the horizontal well, further adjusting the liquid production profile of the horizontal well, inhibiting bottom water coning, delaying the water breakthrough time of the horizontal well and achieving the aims of improving the yield and the recovery ratio of a single well.
According to a first aspect of the present invention, there is provided a flow regulating and water controlling device comprising:
a base pipe, wherein the outer wall of the downstream end of the base pipe is provided with a mounting groove,
a rotational flow controller arranged at the mounting groove,
a protective cylinder sleeved outside the base pipe, wherein the protective cylinder and the base pipe form an annular cavity with a downstream end blocked,
wherein, after the fluid enters the annular cavity, the fluid enters the inner cavity of the base pipe through the rotational flow controller.
In one embodiment, the controller has:
the main body of the controller is provided with a controller,
a rotational flow cavity arranged in the controller main body,
an inlet provided at a side of the controller body for communicating with the cyclone chamber,
an outlet arranged on the bottom surface of the controller main body and communicated with the cyclone cavity, the outlet is communicated with the inner cavity of the base pipe,
a swirl passage for communicating the inlet with the swirl chamber,
a flow dividing passage for communicating the swirling flow passage and the swirling flow chamber,
wherein the controller main body is configured as a rectangular parallelepiped.
In one embodiment, the flow area of the swirl passage tapers in a direction from the inlet to the outlet.
In one embodiment, the ratio of the flow area at the maximum flow area to the flow area at the minimum flow area of the swirl passage is between 2.8 and 3.2.
In one embodiment, the bottom wall of the cyclonic chamber is configured as a ramp and/or the outlet comprises a tapered bore of progressively smaller cross-sectional area in the upstream to downstream direction.
In one embodiment, a plurality of axially extending first bars are disposed on an outer wall of the upstream end of the base pipe within the annular cavity, the plurality of first bars being circumferentially spaced apart.
In one embodiment, a plurality of circumferentially spaced lugs are disposed on the outer wall of the base pipe within the annular cavity, the lugs being disposed downstream of the first lug and abutting the protective sleeve.
In one embodiment, a second bar is arranged on the outer wall of the base pipe at the downstream end of the lug to divide the annular cavity into a plurality of drainage spaces in the circumferential direction, and a mounting groove and a cyclone controller are arranged in each drainage space.
According to a second aspect of the present invention, there is provided a sub comprising:
according to the flow-regulating and water-controlling device,
and the sieve tube device is arranged at the upstream of the flow regulating and water controlling device and is communicated with the flow regulating and water controlling device.
In one embodiment, the screen assembly has:
an inner tube connected with the base tube,
a protective sleeve which is arranged at the outer side of the inner pipe and forms an annular space with the inner pipe, an overflowing hole which is communicated with the annular space is arranged on the protective sleeve,
the filter screen assembly is used for separating the annular space into an inner annular space and an outer annular space, and the inner annular space is communicated with the annular cavity.
In one embodiment, axially extending supports are provided on the wall of the inner tube for supporting the screen assembly.
According to a third aspect of the present invention, there is provided a pipe string comprising:
the oil pipe is arranged on the oil pipe,
a packer arranged at the lower end of the coiled tubing,
a fill switch disposed downstream of the packer,
the nipple described above is arranged downstream of the filling converter.
In one embodiment, an axially extending washpipe is disposed in the lumen of the nipple, wherein the upper end of the washpipe is connected to the fill converter and the outer wall of the washpipe is spaced from the lumen wall of the nipple.
According to a fourth aspect of the present invention, there is provided a secondary water control completion method, comprising:
the method comprises the following steps: the pipe column is put into the well, so that the short section is positioned at the horizontal well section, the filling converter is arranged at the heel end of the horizontal section or the inclined end position of the horizontal well,
step two: so that the packer is set to seal off the annulus between the string and the original well wall,
step three: pumping sand-carrying fluid and gravel into the pipe column to fill the gravel into the annular space between the short section and the original well casing,
step four: the pumping is stopped.
In one embodiment, in step three, the pumped sand-carrying fluid and gravel are pumped at a displacement of 0.1 to 0.2 cubic meters per minute.
In one embodiment, in step four, pumping is stopped when the fill pressure monitored at the wellhead rises by 5 to 10 megapascals.
In one embodiment, in the three steps, the density of the gravel is 1.0 to 1.03 grams per cubic centimeter, the compressive strength is not less than 60MPa, the particle size is 40 to 100 meshes, and the sphericity is not less than 0.95.
Compared with the prior art, the invention has the advantages that after the flow regulating and water controlling device is lowered into a horizontal well, the fluid of the reservoir can enter the annular cavity, then enter the inner cavity of the base pipe through the rotational flow controller and then be conveyed to the ground. The device increases the flow resistance of the fluid in the reservoir, thereby controlling the production speed of the fluid in the reservoir corresponding to the horizontal well, further adjusting the liquid production profile of the horizontal well, inhibiting bottom water coning, delaying the water breakthrough time of the horizontal well, and achieving the purpose of improving the yield and the recovery ratio of the single well.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 shows a pipe string according to an embodiment of the present invention;
FIG. 2 shows a sub according to an embodiment of the invention;
FIG. 3 shows a mandrel according to one embodiment of the present invention;
FIG. 4 shows a swirl controller according to an embodiment of the invention;
in the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
Fig. 1 shows a pipe string 10 according to the present invention. As shown in fig. 1, a tubular string 10 includes, in order from upstream to downstream, a coiled tubing 1, a packer 2, a packing sub 3, and a sub 100. The packer 2 is arranged at the lower end of the coiled tubing 1 and is used for packing an annular space between the tubular column 10 and the original well wall so as to ensure that the gravel cannot return upwards after the gravel is filled in the horizontal section. The filling converter 3 is arranged at the downstream of the packer 2 and used for converting a fluid channel and ensuring that gravel and sand-carrying liquid injected into the inner cavity of the tubular column 10 from a wellhead enter the ring between the horizontal well section short section 100 and the original well barrel after passing through the filling converter 3, and after the sand-carrying liquid enters the inner cavity of the tubular column 10 through the short section 100, the sand-carrying liquid enters the ring between the tubular column 10 and the original well barrel at the upper layer after passing through the filling converter 3 and is finally discharged out of the well. The pup joint 100 comprises a flow regulating and water controlling device 101 and a screen pipe device 102 which are connected, is arranged at the horizontal section of the horizontal well and is used for realizing infinite packing of a reservoir stratum and achieving infinite water control, and the specific structure is described in detail below.
As shown in fig. 2, the nipple 100 includes a flow regulating and water controlling device 101 and a screen device 102 connected to each other. Wherein the flow regulating and controlling device 101 is arranged at the downstream of the screen device 102. After being filtered by the screen assembly 102, the fluid in the wellbore enters the flow control device 101.
As shown in FIG. 2, the screen assembly 102 includes an inner pipe 103, a protective casing 104, and a screen assembly 105. The inner tube 103 is cylindrical. The protective sleeve 104 is sleeved outside the inner pipe 103 and forms an annular space 106 with the inner pipe 103. A screen assembly 105 is disposed within the annular space 106 and is sleeved over the outer wall of the inner tube 103 to divide the annular space 106 into an inner annular space 107 and an outer annular space 108. In addition, a flow hole 109 communicating with the outer annular space 108 is provided in the protective sleeve 104. Thus, fluid may pass through flow holes 109 into outer annular void 108 and then through screen assembly 105 into inner annular void 107.
In one embodiment, a support 110 is provided on the wall of the inner tube 103 for supporting the screen assembly 105. The support 110 may be configured as an axially extending elongated strip provided on the wall of the inner tube 103, for example, the support 110 is a steel bar. The screen assembly 105 includes a screen layer 111 and a support layer 112. The support layer 112 is used to support the flexible filter screen layer 111 for the dual purpose of filtration and flow smoothing. To increase the filtering effect, the filter screen assembly 105 may include a multi-layer screen layer 111 and a support layer 112. The screen device 102 with the structure has the advantages of simple structure, easy realization and good filtering effect.
As shown in fig. 2, the flow regulating and water controlling apparatus 101 has a base pipe 120, a swirl flow controller 121, and a protective cylinder 122. A mounting groove 123 is provided on an outer wall of the downstream end of the base pipe 120 for seating and defining the swirl controller 121. The rotational flow controller 121 generates rotational flow through the fluid therein, and generates different resistances to water and oil in the fluid, so as to control the production speed of the fluid in the corresponding reservoir of the horizontal well, further adjust the liquid production profile of the horizontal well, inhibit bottom water coning, delay the water breakthrough time of the horizontal well, and achieve the purpose of improving the yield and recovery ratio of a single well. The protective sleeve 122 is sleeved outside the base pipe 120 and forms an annular cavity 124 with the base pipe 120, the downstream end of which is sealed. A swirl controller 121 is disposed in the annular cavity 124. At the same time, the annulus cavity 124 communicates with the inner annulus space 107 to receive fluid from the inner annulus space 107.
In one embodiment, as shown in FIG. 4, the swirl controller 121 has a controller body 125, a swirl chamber 126, an inlet 127, an outlet 128, a swirl passage 129, and a flow-splitting passage 130. Wherein, the controller body 125 has a square structure so as to be conveniently installed at the installation groove 123. A swirl chamber 126 is provided in the controller body 125 for receiving fluid flowing in through a swirl passage 129 and a diversion passage 130. An inlet 127 is provided at the side of the controller body 125 for fluid to flow into the swirl chamber 126. An outlet 128 is provided in the bottom surface of the controller body 125, communicating with both the swirl chamber 126 and the interior chamber of the base pipe 120. The cyclone passage 129 is used for communicating the inlet 127 and the cyclone chamber 126, so that the fluid entering through the inlet 127 generates a cyclone effect after passing through the cyclone passage 129 and then enters the cyclone chamber 126. A flow splitting passage 130 is provided between the cyclone passage 129 and the cyclone chamber 126 for communicating the cyclone passage 129 and the cyclone chamber 126. Structurally, the swirl passage 129 is formed by a helical groove. And the diverging flow passages 130 are formed by radial slots provided on the wall of the corresponding swirling flow passage 129. The swirl controller 125 can distinguish formation fluids (oil and water) according to the physical property difference (density and viscosity) and the flow property of the formation fluids, automatically adjust the flow distribution proportion of a flow path, and limit the formation fluids with larger inflow rate and high water content, thereby achieving the effect of self-adaptive oil and water stabilization. Specifically, when the formation fluid entering the swirl controller 125 has a low viscosity and a high density (high water content), the fluid can enter the swirl chamber 126 through two flow paths, namely, the swirl channel 129 and the diversion channel 130, but the resistance of the diversion channel 130 to the formation fluid is greater than the resistance of the swirl channel 129 to the formation fluid, so that the flow rate entering the swirl chamber 126 along the swirl channel 129 is large, the flow rate of the fluid entering the swirl chamber 126 from the swirl channel 129 and performing a near-heart swirling motion is gradually reduced, and finally the fluid flows into the inner cavity of the base pipe 120 through the outlet 128, the faster the fluid flow rate is, the longer the swirling time is, and the longer the flow path of the fluid is, the greater the resistance is generated. When the formation fluid entering the swirl controller 121 has a high viscosity and a low density (low water content), the formation fluid can enter the swirl chamber 126 through two flow paths, namely the swirl passage 129 and the diversion passage 130, but the resistance of the swirl passage 129 to the formation fluid is greater than the resistance of the diversion passage 130 to the formation fluid, so that the flow rate entering the swirl chamber 126 along the diversion passage 130 is relatively high, and the fluid enters the swirl chamber 126 through the diversion passage 130 and finally flows into the inner cavity of the base pipe 120 through the outlet 128.
Preferably, the controller body 125 is made of a tungsten cobalt alloy. The arrangement mode can improve the wear resistance of the cyclone controller 121 and prolong the service life of the cyclone controller. Meanwhile, the controller main body 125 made of a tungsten-cobalt alloy is processed into a rectangular shape, and can be conveniently and rapidly installed at the installation groove 123.
Preferably, the flow area of the swirl passage 129 becomes gradually smaller in the direction from the inlet 127 to the outlet 128. Further preferably, the ratio of the flow area at the maximum flow area to the flow area at the minimum flow area of the swirl passage 129 is 2.8-3.2, for example, the ratio is 3. Through the arrangement, the throttling resistance of the oil-water mixture can be increased, and the flow regulating and water controlling effect is better improved.
Preferably, the bottom wall of the swirling chamber 126 is configured to be inclined, and further preferably, the bottom wall of the swirling chamber 126 is inclined at an angle of 3-5 degrees, for example, 4 degrees, so that the fluid can flow toward the outlet 128 more smoothly. The arrangement mode can improve the effect of guiding oil flow, reduce the resistance to oil and further improve the effect of regulating and controlling water flow.
Preferably, the outlet 128 comprises a tapered bore having a cross-sectional area that gradually decreases in a direction from upstream to downstream. For example, outlet 128 may be configured as a constriction in the direction from the outside to the inside of base pipe 120. It is further preferred that the outlet 128 has a taper angle of 60 degrees, i.e. that the angle between the two waistlines is 60 degrees in an axial section of the outlet 128. By providing the outlet 128 in this manner, fluid is better directed into the interior cavity of the base pipe 120, which has the effect of directing the flowing oil. Moreover, the arrangement mode can also reduce the resistance to oil, and further increase the water control and flow regulation effects. Of course, the outlet 128 may be configured in other configurations, for example, the outlet 128 includes a tapered bore section having a cross-sectional area that decreases in a direction from upstream to downstream, and a cylindrical section disposed downstream of the tapered bore section. The taper angle of the tapered bore section may also be 60 degrees. The arrangement mode can also achieve the purpose of increasing water control and flow regulation.
Note that fig. 4 shows only a part of the swirl controller 121. Swirl controller 121 also includes a cover that can be disposed over the portion shown in the figures. The cover covers the cyclone controller 121 shown in fig. 4 to form a closed cyclone chamber 126 and the like.
As shown in FIG. 3, first bars 131 are provided on the upstream outer wall of base pipe 120 within annulus 124, the first bars 131 extending axially and being circumferentially spaced apart. The upstream end of the annular cavity 124 is thus divided into different fluid flow paths for drainage.
A second bar 133 is provided on the outer wall of base pipe 120 at the downstream end of projection 132. The second bars 133 extend axially and are circumferentially spaced to circumferentially divide the ring cavity 124 into a plurality of drainage spaces 134. Each drainage space 134 is provided with a mounting groove 123 and a swirl controller 121 matched with the mounting groove 123. For example, a plurality of four mounting grooves 123 are provided in the circumferential direction to improve the flow-regulating and water-controlling capability of the flow-regulating and water-controlling device 101.
To communicate the inner annular space 107 with the annular cavity 124, the inner tube 103 and base tube 120 are fixedly connected as shown in FIG. 2. A connector barrel 17 is provided at the downstream end of the protective sheath 104, and the connector barrel 17 is connected to the protective barrel 122. In this way, communication between the inner annular space 107 and the annular cavity 124 is achieved.
By using the pipe column 10, gravel packing operation can be carried out on a horizontal well, so that the effect of limitless reservoir packing can be achieved. Meanwhile, the additional resistance generated can be automatically adjusted according to the physical properties of the inflow fluid, so that the effects of the toe effect and the heterogeneity of an oil layer of the horizontal well are reduced, and the yield of an oil production layer is increased. The nipple 100 with the structure can increase the throttling resistance of oil, water and oil-water mixture, uniformly control liquid in the early stage of oil well exploitation, inhibit liquid production in a high-permeability section, promote liquid production in a low-permeability section, promote uniform lifting of bottom water, have a large control effect, automatically adjust the pressure drop of water passing and oil passing, and have no energy consumption and high efficiency.
In a preferred embodiment, the tubular string 10 further comprises a washpipe 6. Wherein one end of the washpipe 6 is connected to the fill converter 125 and the other end extends along a horizontal section of the pipe string 10. The washpipe 6 is arranged in the inner cavity of the nipple 100 and is arranged at intervals with the inner cavity of the nipple 100. After passing through the screen assembly 102 and the flow control water assembly 101, the fluid enters the annular space formed by the washpipe 6 and the nipple 100, then enters the inner cavity of the washpipe 6 through the downstream end opening of the washpipe 6, and finally returns to the surface. The filling effect of gravel can be ensured by arranging the washpipe 6, so that the effect of infinitely separating reservoirs is improved.
The secondary water control completion method is described in detail below with respect to fig. 1 through 4.
First, the tubular string 10 is run into the wellbore. So that the sub 100 is located at the horizontal section of the well bottom and the filling converter 3 is arranged at the heel end of the horizontal section or the inclined end of the horizontal well.
Then, after the tubular string 10 is in place, the packer 2 is set to seal off the annulus between the tubular string 100 and the original well wall.
And thirdly, injecting sand-carrying fluid and gravel into the inner cavity of the pipe string 10 at the wellhead. The sand-carrying fluid carries gravel and enters the ring between the pipe string 10 and the original well casing of the horizontal section after passing through the packing converter 3. Gravel remains in the annulus between the horizontal sections of the original wellbore and the sand-laden fluid enters the inner annulus 107 of the screen assembly 102, then flows into the annulus 124, passes through the flow restriction control 121, and then enters the washpipe 6. And the returned sand-carrying fluid enters an annular space between the tubular column 100 and the original well casing through the filling converter 3 after passing through the washing pipe 6, and the returned sand-carrying fluid is discharged out of the well after passing through the annular space and enters a circulating tank to complete the circulation of primary filling. In use, the above cycle is repeated until the annulus of the tubing string 10 and the original wellbore of the horizontal section of the horizontal well are all filled with gravel 7. And in the process of filling gravel in the horizontal annular space, judging the filling degree of the horizontal annular space through the filling pressure monitored by the wellhead. For example, when the filling pressure is rapidly increased by 5 to 10 mpa, the horizontal section is filled and the transport can be stopped. Preferably, during filling, filling can be performed with a relatively small displacement, for example, a filling displacement of 0.1-0.2m3/min。
Wherein the gravel used for filling is selected from gravel with low density and density similar to water density, for example, the density of the gravel is 1.0-1.03 g/cm3. By such meansThe arrangement ensures that the gravel can be carried by filling with oilfield water. In a preferred embodiment, the gravel has a compressive strength of not less than 60MPa and a temperature resistance of not less than 200 ℃. In addition, the particle diameter of the gravel is 40-100 meshes, and the sphericity is not less than 0.95. The smaller gravel particle size and the higher sphericity ensure the compactness after gravel packing, reduce the permeability after gravel whole packing, and play a role in obviously blocking the transverse flow of fluid. Meanwhile, the gravel with the characteristic can adapt to the environment in a shaft, and the use requirement is guaranteed to be met.
After filling is finished, the coiled tubing 1 above the packer 2 is lifted out, and an oil production string is put in to produce the oil well.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (16)
1. A flow regulating and water controlling device is characterized by comprising:
a base pipe, wherein the outer wall of the downstream end of the base pipe is provided with a mounting groove,
a rotational flow controller arranged at the mounting groove,
the protective cylinder is sleeved on the outer side of the base pipe, the protective cylinder and the base pipe form an annular cavity with a downstream end blocked, fluid enters the annular cavity and then enters an inner cavity of the base pipe through the rotational flow controller,
the swirl controller has:
the main body of the controller is provided with a controller,
a swirl chamber disposed within the controller body,
an inlet provided at a side of the controller body for communicating with the cyclone chamber,
an outlet arranged on the bottom surface of the controller main body and communicated with the cyclone cavity, the outlet is communicated with the inner cavity of the base pipe,
a swirl passage for communicating the inlet with the swirl chamber,
a flow dividing passage for communicating the swirling flow passage and the swirling flow chamber,
the controller main part structure is the cuboid, the reposition of redundant personnel passageway sets up swirl passageway with between the whirl chamber, in order to be used for communicating swirl passageway with the whirl chamber, swirl passageway is formed by spiral helicine groove, the reposition of redundant personnel passageway is by setting up correspondingly radial groove on swirl passageway's the cell wall forms.
2. A flow regulating and water controlling device according to claim 1, characterized in that the flow area of the swirl passage is gradually reduced in the direction from the inlet to the outlet.
3. A flow regulating and water controlling device according to claim 2, characterized in that the ratio of the flow area at the maximum flow area to the flow area at the minimum flow area of the swirl passage is 2.8-3.2.
4. The apparatus of claim 1, wherein the bottom wall of the cyclonic chamber is configured as a ramp and/or the outlet comprises a tapered bore having a cross-sectional area that decreases in a direction from upstream to downstream.
5. The flow regulating and control device of claim 1, wherein a plurality of axially extending first bars are disposed on an upstream end outer wall of said base pipe within said annular chamber, said first bars being circumferentially spaced apart.
6. The flow regulating and control device of claim 5, wherein a plurality of circumferentially spaced lugs are provided on the outer wall of said base pipe within said annular cavity, said lugs being disposed downstream of said first bar and abutting said protective sleeve.
7. The flow regulating and controlling device according to claim 6, wherein a second bar is provided on the outer wall of the base pipe at the downstream end of the projection to divide the annular chamber circumferentially into a plurality of drainage spaces, and the mounting groove and the swirl controller are provided in each of the drainage spaces.
8. A sub, comprising:
the flow regulating and water controlling device according to any one of claims 1 to 7,
and the sieve tube device is arranged at the upstream of the flow regulating and water controlling device and is communicated with the flow regulating and water controlling device.
9. The sub of claim 8, in which the screen assembly has:
an inner tube connected to the base tube,
a protective sleeve which is arranged outside the inner pipe and forms an annular space with the inner pipe, an overflowing hole communicated with the annular space is arranged on the protective sleeve,
and the filter screen assembly is used for separating the annular space into an inner annular space and an outer annular space, and the inner annular space is communicated with the annular cavity.
10. The sub of claim 9, in which axially extending supports are provided on the wall of the inner tube for supporting the screen assembly.
11. A pipe string, comprising:
the oil pipe is arranged on the oil pipe,
a packer disposed at a lower end of the coiled tubing,
a fill switch disposed downstream of the packer,
a sub according to any of claims 8 to 10, disposed downstream of said packing converter.
12. A tubular string as claimed in claim 11 wherein an axially extending washpipe is provided in the bore of the sub, wherein the washpipe is connected at its upper end to the fill converter and has an outer wall spaced from the bore wall of the sub.
13. A secondary water control completion method, comprising:
the method comprises the following steps: running a tubular string according to claim 11 or 12 such that the sub is located in a horizontal well section, the packing converter being disposed at a heel end of the horizontal section or at a slant end of the horizontal well,
step two: setting the packer to seal off an annulus between the tubular string and the original well wall,
step three: pumping sand-carrying fluid and gravel into the pipe column to fill the gravel into the annular space between the short section and the original well casing,
step four: the pumping is stopped.
14. The method of claim 13, wherein the pumped sand-carrying fluid and gravel in step three have a displacement of 0.1 to 0.2 cubic meters per minute.
15. The method of claim 13 wherein in step four, pumping is stopped when the fill pressure monitored at the wellhead rises by 5 to 10 mpa.
16. The method as claimed in claim 13, wherein the gravel has a density of 1.0 to 1.03g per cubic centimeter, a compressive strength of not less than 60mpa, a particle diameter of 40 to 100 mesh, and a sphericity of not less than 0.95 in step three.
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| CN201710508018.6A CN109138938B (en) | 2017-06-28 | 2017-06-28 | Flow regulating and water controlling device, short joint, tubular column and secondary water controlling well completion method |
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| CN201710508018.6A CN109138938B (en) | 2017-06-28 | 2017-06-28 | Flow regulating and water controlling device, short joint, tubular column and secondary water controlling well completion method |
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| CN109138938B true CN109138938B (en) | 2020-11-10 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112832723B (en) * | 2019-11-22 | 2022-12-09 | 中国石油化工股份有限公司 | Self-adaptive water control device for gas well and design method thereof |
| CN113639304A (en) * | 2020-05-11 | 2021-11-12 | 中国石油化工集团有限公司 | Forced convection heat exchange type geothermal water horizontal well single well heat supply system |
| CN111980627A (en) * | 2020-08-31 | 2020-11-24 | 东营市瑞丰石油技术发展有限责任公司 | Oil extraction water control valve |
| CN112267855B (en) * | 2020-09-22 | 2023-02-07 | 中国石油天然气股份有限公司 | Flow-regulating water-controlling sand-preventing well completion pipe string and sand filling method |
| CN112228014A (en) * | 2020-11-03 | 2021-01-15 | 山东普瑞思德石油技术有限公司 | Anti-blocking water control screen pipe |
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