CN114427381B - Downhole fluid injection flow speed regulator and method - Google Patents
Downhole fluid injection flow speed regulator and method Download PDFInfo
- Publication number
- CN114427381B CN114427381B CN202011068840.3A CN202011068840A CN114427381B CN 114427381 B CN114427381 B CN 114427381B CN 202011068840 A CN202011068840 A CN 202011068840A CN 114427381 B CN114427381 B CN 114427381B
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- groove
- diversion
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- 239000012530 fluid Substances 0.000 title claims abstract description 62
- 238000002347 injection Methods 0.000 title claims abstract description 50
- 239000007924 injection Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 76
- 238000007789 sealing Methods 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 210000001503 joint Anatomy 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 238000003825 pressing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
Abstract
The utility model discloses a downhole fluid injection flow regulator and a method thereof, comprising a body, a clamping sleeve and a sealing rubber cylinder; the card envelope is sleeved outside the body; the outer wall of the upper half section of the body is provided with a diversion convolution groove, and the outer wall of the upper half section of the body is sleeved with a sealing rubber cylinder, and the sealing rubber cylinder and the clamping sleeve form a sliding sealing pair; the body is provided with a body liquid outlet hole, and the body liquid outlet hole can enable the inner cavity of the body to be communicated with the injection end of the diversion convolution groove; the sealing rubber cylinder is provided with a rubber cylinder liquid outlet hole which can be communicated with a liquid outlet end of the diversion convolution groove; the clamping sleeve is provided with an output hole, and the outside of the clamping sleeve can be communicated with the liquid outlet hole of the rubber cylinder through the output hole. The adjustment of the fluid speed limit value is realized, and the requirements of different injection layers are met; the diversion convolution groove structure can also prevent the oil fluid from entering the oil pipe at high speed and prevent the kick blowout.
Description
Technical Field
The utility model relates to the technical field of downhole tools for petroleum exploitation, in particular to a downhole fluid injection flow regulator and a downhole fluid injection flow regulating method.
Background
At present, in the hydraulic control separate layer water injection and oil extraction process pipe column of the oil exploitation well, the underground one-way conduction valve can only conduct unidirectionally by means of a ball body, a spring and the like, and the other direction is pressed to block a channel, so that the functions of preventing reverse sand discharge, well control safety and the like are realized, and the oil exploitation safety is ensured. However, in actual production, sometimes fluid injection or extraction is required under a low-speed flow safety controlled state of oil well fluid, when the fluid speed is increased, and reaches a designed critical value, the flow speed is controlled to be reduced or even blocked, so that the phenomenon that an oil layer is impacted and damaged or oil is excessively discharged from an oil reservoir to cause well kick is avoided, and abnormal conditions such as blowout and the like are caused, and when well control measures are adopted, well control fluid can be rapidly fed into the oil reservoir.
Publication (bulletin) number: CN105392958B publication (bulletin) date: an embodiment of the downhole tool disclosed in 2017-09-05 includes a pump powered by rotation of the drill string to increase fluid pressure during a downhole cycle.
Publication (bulletin) number: CN103906998A, publication (date): 2014-07-02 for determining a flow rate of a fluid in a wellbore or inside a wellbore casing. The downhole tool comprises a tool housing extending along a longitudinal axis and having a circumference perpendicular to the longitudinal axis, the tool housing being adapted to be lowered into the borehole or borehole casing interior; a longitudinal transducer which emits a detection signal from an end of the tool housing substantially longitudinally into a fluid flowing in the borehole or borehole casing such that the emitted detection signal is acted upon by a reflective entrainment surface in the flowing fluid, and which receives a reflected signal which is substantially reflected from the reflective entrainment surface in the fluid flowing longitudinally in the well towards the end of the tool housing, whereby a flow rate of the fluid can be obtained from the continuously received Reflected Signal (RS); a plurality of electrodes disposed about the outer circumference of the tool in spaced relation about the longitudinal axis such that fluid flows between the electrodes and the borehole wall or borehole casing wall; and measuring means for measuring the capacitance between the two electrodes in all combinations of n (n-1)/2 capacitance measurements giving n electrodes, wherein the downhole tool has a space between each two electrodes substantially filled with a non-conductive medium to determine a property of the fluid from which the flow rate is derived.
Publication (bulletin) number: CN111536287a, publication (date): 2020-08-14 discloses a constant volume fluid control valve capable of dynamically adjusting flow speed, which comprises a valve body, wherein a valve body pipeline for passing fluid is arranged in the valve body, a valve body valve plate for sealing the valve body pipeline is rotatably arranged in the valve body pipeline, a fluid cavity is arranged in the top end wall of the valve body pipeline, a synchronous cavity is arranged in the left end wall of the fluid cavity, a sliding cavity is arranged in the left end wall of the synchronous cavity, and a switching sliding block is arranged in the sliding cavity in a sliding mode; the device has the advantages that the structure is simple, the operation is convenient, the maintenance is convenient, the device can realize the real-time monitoring of the fluid flow velocity in the pipeline, the dynamic adjustment is carried out, the stability of the fluid flow velocity is ensured, the damage of the fluid flow velocity to the pipeline is reduced, the fluid volume can be accurately measured, the storage tank body is automatically closed, the manual repeated operation is avoided, the occupation time of the single tank body to the fluid valve port is reduced, the working efficiency is improved, and the time cost is reduced, so that the device has higher use and popularization value.
Publication (bulletin) number: CN210440013U, publication (date): 2020-05-01 discloses an underground adjustable water distributor, which comprises a shell, a flowmeter and an electric blanking plug, wherein a central pipe is arranged in the center of the water distributor, an upper central pipe is inserted between an upper joint and a mounting body, a lower central pipe is arranged on the other side of the mounting body, and the underground adjustable water distributor further comprises a circuit module, a liquid flow power generation device, a liquid inlet channel, a liquid outlet channel, a water inlet regulating device and a water inlet hole; when water is injected underground, the flowing liquid drives the impeller in the liquid flow power generation device to rotate, the gear on the generator is driven to rotate, power generation is realized, and the electric energy generated by the generator is stored in the storage battery, so that a stable power supply is provided for the operation of the electric plug and the flowmeter, the problem of poor stability of an electric control system generated by ground power supply in the prior art is avoided, underground adjustment is realized on the injection amount, the cost is saved, and the working efficiency is improved.
In summary, the technical scheme of the above disclosed technology, the technical problems to be solved and the generated beneficial effects are different from those of the present utility model, or the technical field or application occasion is different, and the technical documents disclosed above do not have technical teaching aiming at more technical features of the present utility model, the technical problems to be solved and the beneficial effects.
Disclosure of Invention
The utility model aims to provide an underground fluid injection flow regulator and a method thereof aiming at the defects existing in the prior art, wherein liquid in an oil pipe enters a rotary groove from a groove head hole of a body, liquid out of a groove tail enters an oil sleeve annulus through a sealing rubber cylinder and a clamping sleeve, meanwhile, flow speed regulation is carried out through a downward flow regulating instrument, the regulation of a fluid speed limit value is realized, the requirements of different injection layers are met, in addition, the underground fluid injection flow regulator has an oil collar, in addition, the air fluid low-speed fluid normally enters the oil pipe to realize necessary oil layer parameter test, and the diversion rotary groove structure can also prevent the high-speed entry of the oil layer into the oil pipe and prevent the kick blowout.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
an underground fluid injection flow regulator comprises a body, a clamping sleeve and a sealing rubber cylinder;
the card envelope is sleeved outside the body;
the outer wall of the upper half section of the body is provided with a diversion convolution groove, and the outer wall of the upper half section of the body is sleeved with a sealing rubber cylinder, and the sealing rubber cylinder and the clamping sleeve form a sliding sealing pair;
the body is provided with a body liquid outlet hole, and the body liquid outlet hole can enable the inner cavity of the body to be communicated with the injection end of the diversion convolution groove;
the sealing rubber cylinder is provided with a rubber cylinder liquid outlet hole which can be communicated with a liquid outlet end of the diversion convolution groove; the clamping sleeve is provided with an output hole, and the outside of the clamping sleeve can be communicated with the liquid outlet hole of the rubber cylinder through the output hole.
Further, the diversion convolution groove is formed by obliquely splicing a plurality of p and q letter-shaped grooves, an injection hole is processed at the beginning end of the diversion convolution groove, and a liquid outlet end is arranged at the tail end of the diversion convolution groove.
Further, all the positions on the diversion convolution groove, which are consistent with the axial positions of the liquid outlet ends at the tail ends of the diversion convolution groove, are correspondingly liquid outlet positions.
Further, the diversion convolution groove is formed by mutually splicing groove leg parts with p and q letter shapes removed, an injection hole is processed at the initial end of the diversion convolution groove, and the right middle part of the q letter groove is a liquid outlet end.
Further, the lower end of the clamping sleeve is connected with the lower joint, the lower end of the body is provided with a spring, and the lower end of the spring is axially limited on a limiting ring table on the inner wall of the lower joint.
Further, the upper end of the spring is propped against the spring seat, and the upper end of the spring seat is propped against the lower end face of the body.
Further, an annular space is formed between the outer wall of the lower half section of the body and the inner wall of the clamping sleeve, the body is provided with at least three uniformly distributed vertical bar radial holes which are radially communicated with the annular space, and the vertical bar radial holes are simultaneously used as poking tooth holes capable of poking the body.
Further, the inner wall of the clamping sleeve is provided with a limiting upper shoulder for limiting the axial upward movement of the body.
Further, the upper end of the clamping sleeve is connected with the lower end of the positioning sleeve through an upper connector, namely the lower end face of the positioning sleeve is in butt joint with the upper end face of the clamping sleeve, the lower end of the upper connector is in threaded connection with the clamping sleeve and is provided with a locking nail, and an inner pressing table on the inner wall of the upper connector presses an outer pressing table on the outer wall of the positioning sleeve.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a method of using a downhole fluid injection flow modulator, comprising the steps of:
the body is connected to the water injection well process pipe column in an up-down threaded manner and is lowered into the water injection layer;
ground injection water enters a liquid outlet hole of the main body of the utility model through a process pipe column, then flows through a diversion convolution groove to reach a liquid outlet end, passes through the liquid outlet hole of the sealing rubber cylinder and an output hole of the clamping sleeve, and is injected into a stratum;
when the flow rate of the injected water is too high, reflux resistance is formed due to the action of a reflux groove structure in the diversion rotary groove, so that the flowing force of the fluid in the main direction is weakened, even the injected fluid is completely prevented from entering the stratum, and sand production caused by flushing of the injected fluid on the stratum is effectively avoided;
when the injected water quality is adjusted, the flow rate of the injected fluid can be increased, the measuring and adjusting instrument is put in, the body is rotated to a set angle through the positioning sleeve for positioning, the measuring and adjusting are carried out simultaneously, and the output hole of the clamping sleeve is aligned with the other liquid outlet position of the diversion convolution groove, so that the flow rate adjustment is realized.
Compared with the prior art, the utility model has the following beneficial effects:
1. the valve body has no moving part and high reliability;
2. the fluid flow rate of any layer can be limited by constant pressure;
3. the method is used in an oil well, the production speed is controlled, and the well is rapidly controlled under abnormal conditions;
4. the water well is used for controlling the injection speed and preventing sand from being produced by impacting the oil reservoir.
Drawings
FIG. 1 is a schematic illustration of a downhole fluid injection flow modulator of the present utility model;
FIG. 2 is a plan expansion structure diagram of a diversion convolution groove on the outer cylindrical surface of the body;
FIG. 3 is a structural view of the packing element 3;
fig. 4 is a plan expanding structure view of another diversion convolution groove.
In the figure: the sealing device comprises a body 1, a clamping sleeve 2, a positioning sleeve 5, an upper joint 4, a sealing rubber cylinder 3, a lower joint 6, a compression spring 7 and a spring seat 8.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1:
referring to fig. 1 to 4, the present utility model provides a technical solution:
an underground fluid injection flow regulator comprises a body 1, a clamping sleeve 2 and a sealing rubber cylinder 3;
the card envelope is sleeved outside the body;
the outer wall of the upper half section of the body is provided with a diversion convolution groove 105, and the outer wall of the upper half section of the body is sleeved with a sealing rubber cylinder, and the sealing rubber cylinder and the clamping sleeve form a sliding sealing pair;
the body is provided with a body liquid outlet hole 102, and the body liquid outlet hole can enable the inner cavity of the body to be communicated with the injection end of the diversion convolution groove;
the sealing rubber cylinder is provided with a rubber cylinder liquid outlet hole 301 which can be communicated with a liquid outlet end of the diversion convolution groove; the clamping sleeve is provided with an output hole 201, and the outside of the clamping sleeve can be communicated with the liquid outlet hole of the rubber cylinder through the output hole.
Further, the diversion convolution groove is formed by obliquely splicing a plurality of p and q letter-shaped grooves, an injection hole is processed at the beginning end of the diversion convolution groove, and a liquid outlet end is arranged at the tail end of the diversion convolution groove.
Further, all the positions on the diversion convolution groove, which are consistent with the axial positions of the liquid outlet ends at the tail ends of the diversion convolution groove, are correspondingly liquid outlet positions.
Further, the lower end of the clamping sleeve is connected with the lower joint 6, the lower end of the body is provided with a compression spring 7, and the lower end of the compression spring is axially limited on a limiting ring table on the inner wall of the lower joint.
Further, the upper end of the compression spring is propped against the spring seat, and the upper end of the spring seat is propped against the lower end face of the body.
Further, an annular space is formed between the outer wall of the lower half section of the body and the inner wall of the clamping sleeve, the body is provided with at least three uniformly distributed vertical bar radial holes which are radially communicated with the annular space, and the vertical bar radial holes are simultaneously used as poking tooth holes capable of poking the body. When the toggle-setting tool or the rotary mechanism is then lowered, the toggle-setting tool itself is known in the art and will not be described in detail.
Further, the inner wall of the clamping sleeve is provided with a limiting upper shoulder for limiting the axial upward movement of the body.
Further, the upper end of the clamping sleeve is connected with the lower end of the positioning sleeve 5 through the upper connector 4, namely the lower end face of the positioning sleeve is in butt joint with the upper end face of the clamping sleeve, the lower end of the upper connector is in threaded connection with the clamping sleeve and is provided with a locking nail, and the inner pressing table of the inner wall of the upper connector presses the outer pressing table of the outer wall of the positioning sleeve.
The sealing rubber cylinder 3 is sleeved on the outer cylindrical surface 103 of the diversion convolution groove of the body 1, then the sealing rubber cylinder is tightly pressed through the clamping sleeve 2, the liquid outlet hole 301 of the sealing rubber cylinder 3 and the liquid outlet hole 201 of the clamping sleeve 2 are aligned with the liquid outlet end 106 of the diversion convolution groove 105, the positioning sleeve 5 is inserted into the upper connector 4, the upper connector 4 is tightly pressed through the threaded connection of the clamping sleeve 2, the lower end of the clamping sleeve 2 is connected with the lower connector 6, and the spring seat 8 and the compression spring 7 are tightly pressed on the lower end face of the body 1.
The outer cylindrical surface of the upper end of the body 1 is provided with a step 104, and the size of the step is matched with the end face size of the sealing rubber cylinder 3.
The upper end face of the sealing rubber cylinder 3 is flush with the upper end face 101 of the body 1, and is propped against the lower part of the inner step of the clamping sleeve 2.
The clamping sleeve 2 is provided with an output hole 201, and the diameter and the axial position of the output hole are consistent with those of the liquid outlet hole 301 of the sealing rubber cylinder 3.
Referring to fig. 2, the diversion convolution groove 105 on the outer cylindrical surface of the body 1 is formed by obliquely splicing a plurality of p and q letter-shaped grooves, one end of the diversion convolution groove is provided with an injection hole 102, the tail end is a liquid outlet end 106, and the positions 107 and 108 of the p and q letter joints consistent with the axial positions of the injection hole 106 are correspondingly liquid outlet positions.
Referring to fig. 3, the sealing rubber cylinder 3 is uniformly provided with liquid outlet holes 301 on the circumference, and the diameter and axial position of the liquid outlet holes are consistent with the groove width and axial position of the diversion convolution grooves 106, 107 and 108.
Referring to fig. 4, the guide convolution groove 105 on the outer cylindrical surface of the body 1 is removed, the guide convolution groove 105 formed by splicing the legs of the p-letter shaped groove and the q-letter shaped groove is formed, the right middle part of the q-letter shaped groove is a liquid outlet end 109, and 110, 111 and 112 with the same axial positions as the liquid outlet positions are correspondingly formed.
When in field application, the body 1 of the utility model is connected to a water injection well process pipe column in an up-down threaded manner and is put into a water injection layer. Ground injection water enters the liquid outlet hole 102 of the main body 1 of the utility model through a process pipe column, then flows through the diversion convolution groove 105, reaches the liquid outlet end 106, passes through the liquid outlet hole 301 of the sealing rubber cylinder 3 and the output hole 201 of the clamping sleeve 2, and is injected into the stratum. When the flow rate of the injected water is too high, the reflux resistance is formed due to the reflux groove structure in the diversion convolution groove 105, so that the flow force of the fluid in the main direction is weakened, even the injected fluid is completely prevented from entering the stratum, and sand production caused by flushing of the injected fluid on the stratum is effectively avoided. When the injected water quality is adjusted, the flow rate of the injected fluid can be increased, the flow rate adjusting instrument can be put into the device for measuring and adjusting, the body 1 is rotated to a set angle through the positioning sleeve 5 for positioning, the device is used for measuring and adjusting simultaneously, the output hole 201 of the clamping sleeve 2 is aligned with the other liquid outlet position of the diversion rotary groove 105, and the flow rate adjustment is realized.
The liquid inlet in the oil pipe enters the rotary groove from the groove head hole of the body, the liquid outlet at the tail of the groove enters the oil sleeve annulus through the sealing rubber sleeve and the clamping sleeve, meanwhile, the flow speed adjustment can be carried out through the downward-entering measuring and adjusting instrument, the adjustment of the speed limit value of the fluid is realized, the requirement of different injection layers is met, in addition, the necessary oil layer parameter test is realized by the air fluid low-speed fluid of the oil sleeve ring normally passing through the entering oil pipe, the diversion rotary groove structure can also prevent the high-speed entering of the oil layer fluid into the oil pipe, and the kick blowout is prevented.
Example 2:
referring to fig. 1 to 4, the present utility model provides a technical solution:
an underground fluid injection flow regulator comprises a body 1, a clamping sleeve 2 and a sealing rubber cylinder 3;
the card envelope is sleeved outside the body;
the outer wall of the upper half section of the body is provided with a diversion convolution groove 105, and the outer wall of the upper half section of the body is sleeved with a sealing rubber cylinder, and the sealing rubber cylinder and the clamping sleeve form a sliding sealing pair;
the body is provided with a body liquid outlet hole 102, and the body liquid outlet hole can enable the inner cavity of the body to be communicated with the injection end of the diversion convolution groove;
the sealing rubber cylinder is provided with a rubber cylinder liquid outlet hole 301 which can be communicated with a liquid outlet end of the diversion convolution groove; the clamping sleeve is provided with an output hole 201, and the outside of the clamping sleeve can be communicated with the liquid outlet hole of the rubber cylinder through the output hole.
Further, the diversion convolution groove is formed by mutually splicing groove leg parts with p and q letter shapes removed, an injection hole is processed at the initial end of the diversion convolution groove, and the right middle part of the q letter groove is a liquid outlet end.
Further, the lower end of the clamping sleeve is connected with the lower joint 6, the lower end of the body is provided with a compression spring 7, and the lower end of the compression spring is axially limited on a limiting ring table on the inner wall of the lower joint.
Further, the upper end of the compression spring is propped against the spring seat, and the upper end of the spring seat is propped against the lower end face of the body.
Further, an annular space is formed between the outer wall of the lower half section of the body and the inner wall of the clamping sleeve, the body is provided with at least three uniformly distributed vertical bar radial holes which are radially communicated with the annular space, and the vertical bar radial holes are simultaneously used as poking tooth holes capable of poking the body. When the toggle-setting tool or the rotary mechanism is then lowered, the toggle-setting tool itself is known in the art and will not be described in detail.
Example 3:
referring to fig. 1 to 4, the present utility model provides a technical solution:
an underground fluid injection flow regulator comprises a body 1, a clamping sleeve 2 and a sealing rubber cylinder 3;
the card envelope is sleeved outside the body;
the outer wall of the upper half section of the body is provided with a diversion convolution groove 105, and the outer wall of the upper half section of the body is sleeved with a sealing rubber cylinder, and the sealing rubber cylinder and the clamping sleeve form a sliding sealing pair;
the body is provided with a body liquid outlet hole 102, and the body liquid outlet hole can enable the inner cavity of the body to be communicated with the injection end of the diversion convolution groove;
the sealing rubber cylinder is provided with a rubber cylinder liquid outlet hole 301 which can be communicated with a liquid outlet end of the diversion convolution groove; the clamping sleeve is provided with an output hole 201, and the outside of the clamping sleeve can be communicated with the liquid outlet hole of the rubber cylinder through the output hole.
Further, the diversion convolution groove is formed by obliquely splicing a plurality of p and q letter-shaped grooves, an injection hole is processed at the beginning end of the diversion convolution groove, and a liquid outlet end is arranged at the tail end of the diversion convolution groove.
Further, all the positions on the diversion convolution groove, which are consistent with the axial positions of the liquid outlet ends at the tail ends of the diversion convolution groove, are correspondingly liquid outlet positions.
Although all of the above embodiments use fig. 1 to 4, it will be apparent to those skilled in the art that a separate drawing is not provided to illustrate the embodiments, as long as the missing components or structural features are removed from the drawing. As will be clear to a person skilled in the art. Of course, the more components of the embodiment are just the optimal embodiment, the fewer components of the embodiment are basic embodiments, but the basic object of the utility model can be achieved, so all the modified embodiments are within the protection scope of the utility model.
In this application, all parts which are not discussed are known in the art, and the connection manner of all parts in this application is not described in detail. Such as welding, threaded connections, etc.
In the present utility model, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. The downhole fluid injection flow regulator is characterized by comprising a body, a clamping sleeve and a sealing rubber cylinder;
the card envelope is sleeved outside the body;
the outer wall of the upper half section of the body is provided with a diversion convolution groove, and the outer wall of the upper half section of the body is sleeved with a sealing rubber cylinder, and the sealing rubber cylinder and the clamping sleeve form a sliding sealing pair;
the body is provided with a body liquid outlet hole, and the body liquid outlet hole can enable the inner cavity of the body to be communicated with the injection end of the diversion convolution groove;
the sealing rubber cylinder is provided with a rubber cylinder liquid outlet hole which can be communicated with a liquid outlet end of the diversion convolution groove; the clamping sleeve is provided with an output hole which can enable the outside of the clamping sleeve to be communicated with the liquid outlet hole of the rubber cylinder;
the diversion convolution groove is formed by obliquely splicing a plurality of p-letter-shaped and q-letter-shaped grooves, an injection hole is processed at the initial end of the diversion convolution groove, and a liquid outlet end is arranged at the tail end of the diversion convolution groove; all the positions on the diversion convolution groove, which are consistent with the axial positions of the liquid outlet end at the tail end of the diversion convolution groove, are correspondingly liquid outlet positions;
the diversion convolution groove is formed by mutually splicing groove legs with p and q letter shapes removed, an injection hole is processed at the initial end of the diversion convolution groove, and the right middle part of the q letter groove is a liquid outlet end;
an annular space is formed between the outer wall of the lower half section of the body and the inner wall of the clamping sleeve, the body is provided with at least three uniformly distributed vertical bar radial holes which are radially communicated with the annular space, and the vertical bar radial holes are simultaneously used as poking tooth holes capable of poking the body.
2. A downhole fluid injection flow modulator according to claim 1, wherein the lower end of the clamping sleeve is connected with the lower joint, the lower end of the body is provided with a spring, and the lower end of the spring is axially limited on a limiting ring table on the inner wall of the lower joint.
3. A downhole fluid injection flow modulator according to claim 2, wherein the upper end of the spring abuts against a spring seat, the upper end of the spring seat abutting against the lower end face of the body.
4. A downhole fluid injection flow modulator according to claim 1, wherein the inner wall of the clamping sleeve is provided with a limit upper shoulder for limiting the axial upward movement of the body.
5. The downhole fluid injection flow regulator according to claim 1, wherein the upper end of the clamping sleeve is connected with the lower end of the positioning sleeve through an upper connector, namely the lower end surface of the positioning sleeve is in butt joint with the upper end surface of the clamping sleeve, the lower end of the upper connector is in threaded connection with the clamping sleeve and is provided with a locking nail, and the inner pressure table of the inner wall of the upper connector presses the outer pressure table of the outer wall of the positioning sleeve.
6. A method of using the downhole fluid injection flow modulator of claim 1, comprising the steps of:
the body is connected to the water injection well process pipe column in an up-down threaded manner and is lowered into the water injection layer;
ground injection water enters a liquid outlet hole of the main body through a process pipe column, then flows through a diversion convolution groove, reaches a liquid outlet end, passes through the liquid outlet hole of the sealing rubber cylinder and an output hole of the clamping sleeve, and is injected into a stratum;
when the flow rate of the injected water is too high, reflux resistance is formed due to the action of a reflux groove structure in the diversion rotary groove, so that the flowing force of the fluid in the main direction is weakened, even the injected fluid is completely prevented from entering the stratum, and sand production caused by flushing of the injected fluid on the stratum is effectively avoided;
when the injected water quality is adjusted and the flow rate of the injected fluid is increased, the flow rate adjusting instrument is put in, the body is rotated to a set angle through the positioning sleeve for positioning, and the adjustment is performed while the clamping sleeve output hole is aligned to the other liquid outlet position of the diversion convolution groove, so that the flow rate adjustment is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011068840.3A CN114427381B (en) | 2020-10-13 | 2020-10-13 | Downhole fluid injection flow speed regulator and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011068840.3A CN114427381B (en) | 2020-10-13 | 2020-10-13 | Downhole fluid injection flow speed regulator and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114427381A CN114427381A (en) | 2022-05-03 |
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| CN207332849U (en) * | 2017-09-22 | 2018-05-08 | 中国石油化工股份有限公司 | A kind of subdivision of reservoir water injection string |
| CN208686366U (en) * | 2018-09-04 | 2019-04-02 | 中国石油化工集团公司 | Water injection well well workover system with pressure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8261822B2 (en) * | 2008-10-21 | 2012-09-11 | Baker Hughes Incorporated | Flow regulator assembly |
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| US5443117A (en) * | 1994-02-07 | 1995-08-22 | Halliburton Company | Frac pack flow sub |
| CN102268978A (en) * | 2010-06-02 | 2011-12-07 | 哈利伯顿能源服务公司 | Variable flow resistance system for use in subterranean well |
| CN203420672U (en) * | 2013-07-05 | 2014-02-05 | 天津大港油田钻采技术开发公司 | Hydraulic type downhole stratification seeking and separating water switch |
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| CN207332849U (en) * | 2017-09-22 | 2018-05-08 | 中国石油化工股份有限公司 | A kind of subdivision of reservoir water injection string |
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| CN208686366U (en) * | 2018-09-04 | 2019-04-02 | 中国石油化工集团公司 | Water injection well well workover system with pressure |
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| CN114427381A (en) | 2022-05-03 |
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