CN118110467A - Method for judging execution of opening adjustment action of underground hydraulic control sliding sleeve - Google Patents
Method for judging execution of opening adjustment action of underground hydraulic control sliding sleeve Download PDFInfo
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- CN118110467A CN118110467A CN202410189782.1A CN202410189782A CN118110467A CN 118110467 A CN118110467 A CN 118110467A CN 202410189782 A CN202410189782 A CN 202410189782A CN 118110467 A CN118110467 A CN 118110467A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000001595 flow curve Methods 0.000 claims abstract description 31
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000012795 verification Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000001174 ascending effect Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 91
- 239000010720 hydraulic oil Substances 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
-
- 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
- E21B47/00—Survey of boreholes or wells
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- Mining & Mineral Resources (AREA)
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- Geochemistry & Mineralogy (AREA)
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a method for judging execution of opening adjustment action of an underground hydraulic control sliding sleeve, which comprises the following specific steps: s1, dividing the opening adjustment action of an underground hydraulic control sliding sleeve into different time stages, and obtaining the instantaneous flow and corresponding time of a high-pressure oil inlet pipeline and a low-pressure oil return pipeline in each stage node; s2, respectively constructing a high-pressure oil inlet instantaneous flow curve and a low-pressure oil return instantaneous flow curve as reference curves according to the data acquired in the S1 by taking time as an abscissa and instantaneous flow as an ordinate; s3, monitoring the instantaneous flow of the high-pressure oil inlet pipeline and the low-pressure oil return pipeline, and judging the opening degree adjusting action of the underground hydraulic control sliding sleeve. The method has the beneficial effects that the reference curve is executed by constructing the opening adjustment action of the underground sliding sleeve, and the judgment basis for judging whether the opening adjustment action is executed by the underground sliding sleeve can be used under the condition that the visual observation cannot be realized through the shape of the curve and the instantaneous flow numerical value change trend.
Description
Technical Field
The invention relates to the field of oil and natural gas well completion, in particular to a method for judging execution of an opening degree adjusting action of a downhole hydraulic control sliding sleeve.
Background
The direct hydraulic intelligent well completion technology feeds back the monitoring data of all underground oil layers to the ground through an underground measuring working cylinder, and gives an underground regulation and control instruction after analysis and calculation; the ground control system directly drives the underground hydraulic control sliding sleeve through a hydraulic pipeline, realizes different opening adjustment of the hydraulic control sliding sleeve, meets the well completion technology of adjustment of flow channels of each oil layer, and is widely used under special working conditions such as foreign deep water oil fields, unmanned platforms, horizontal wells and the like due to the characteristics of simple structure and high reliability. The underground hydraulic control sliding sleeve is of a pure mechanical structure, does not contain an electric element, does not contain a displacement sensor, cannot acquire opening position information of the underground hydraulic control sliding sleeve in a mode of monitoring displacement of a central tube of the hydraulic control sliding sleeve, and how to realize accurate judgment of execution information and opening position of opening adjustment actions of the underground hydraulic control sliding sleeve of a direct hydraulic intelligent well completion is a problem of primary solution of on-site popularization and application of the direct hydraulic intelligent well completion technology.
Disclosure of Invention
The invention overcomes the defects in the prior art and provides a method for judging the execution of the opening degree adjustment action of the underground hydraulic control sliding sleeve.
The aim of the invention is achieved by the following technical scheme.
The method for judging the execution of the opening adjustment action of the underground hydraulic control sliding sleeve comprises the following specific steps:
s1, dividing the opening adjustment action of an underground hydraulic control sliding sleeve into different time stages, and obtaining the instantaneous flow and corresponding time of a high-pressure oil inlet pipeline and a low-pressure oil return pipeline in each stage node;
S2, respectively constructing a high-pressure oil inlet instantaneous flow curve and a low-pressure oil return instantaneous flow curve as reference curves according to the data acquired in the S1 by taking time as an abscissa and instantaneous flow as an ordinate;
S3, monitoring the instantaneous flow of the high-pressure oil inlet pipeline and the low-pressure oil return pipeline, comparing the variation trend of the instantaneous flow with a reference curve to judge the time stage corresponding to the underground hydraulic control sliding sleeve, substituting the monitored data into the high-pressure oil inlet instantaneous flow curve and the low-pressure oil return instantaneous flow curve, forming the area of a closed graph and the volume of a piston cavity corresponding to the opening stage of a certain stage of the underground hydraulic control sliding sleeve through the instantaneous flow curve and the coordinate axis, and judging the movement stage of the underground hydraulic control sliding sleeve.
S1, the opening degree adjusting action of the underground hydraulic control sliding sleeve is divided into 5 time stages, including a high-pressure pipeline oil inlet stage, an underground hydraulic control sliding sleeve hydraulic piston starting stage, a low-pressure oil return pressure spreading stage after piston starting, an underground hydraulic control sliding sleeve opening degree adjusting movement stage and an underground hydraulic control sliding sleeve opening degree adjusting movement in-place verification stage,
A high pressure pipeline oil inlet stage which is characterized in that when the time is close to 0 in a wireless way, the instantaneous flow rate of the high pressure oil inlet reaches a maximum value Q Feeding in max; the high-pressure oil inlet instantaneous flow keeps the maximum value Q Feeding in max to enter a high-pressure pipeline, the high-pressure instantaneous flow curve is represented as a horizontal straight line, and the low-pressure oil return instantaneous flow is 0;
The hydraulic piston of the underground hydraulic sliding sleeve starts up, the high-pressure oil inlet instantaneous flow rate in the stage has a descending trend from a maximum value Q Feeding in max, when the pressure of the front wall surface of the piston of the underground hydraulic sliding sleeve is equal to the static friction force between the piston and the cylinder body, the piston of the underground hydraulic sliding sleeve is in a starting critical state, at the moment, the corresponding high-pressure oil inlet instantaneous flow rate is Q Start-up , and the low-pressure oil return instantaneous flow rate is 0;
a low-pressure oil return pressure transmission stage after the piston is started, wherein the low-pressure oil return instantaneous flow is monitored in the stage, and the high-pressure oil inlet instantaneous flow is continuously reduced;
The opening degree of the underground hydraulic control sliding sleeve is adjusted to move, the low-pressure oil return instantaneous flow in the stage is gradually increased and is in an ascending trend until the low-pressure oil return instantaneous flow reaches a maximum value Q Returning to max, and the high-pressure oil inlet instantaneous flow is continuously reduced;
The opening degree of the underground hydraulic control sliding sleeve is adjusted to move to a verification stage in which the instantaneous flow of high-pressure oil inlet is continuously reduced until the instantaneous flow approaches to 0; the low pressure return instantaneous flow continues to decrease from a maximum value Q Returning to max until it goes to 0.
And S3, forming a closed graph through the high-pressure oil inlet instantaneous flow curve and the coordinate axis, wherein the area of the formed closed graph is equal to the volume of a piston cavity corresponding to the opening level of a certain level of the underground sliding sleeve, and determining the opening level of the underground sliding sleeve.
S3, forming a closed graph by the low-pressure oil return instantaneous flow curve and the coordinate axis, wherein the area of the formed closed graph is equal to the volume of a piston cavity corresponding to the opening progression of a certain level of the underground sliding sleeve, and determining the opening progression of the underground sliding sleeve of the direct hydraulic intelligent well completion.
And S3, when the area of a closed graph formed by the low-pressure oil return instantaneous flow curve and the coordinate axis is equal to the area of a closed graph formed by the high-pressure oil inlet instantaneous flow curve and the coordinate axis, and the value is equal to the volume of the piston cavity of the underground sliding sleeve of the target opening level, judging that the opening adjustment action of the underground sliding sleeve is executed in place.
The beneficial effects of the invention are as follows:
According to the scheme, the reference curve is executed by constructing the underground sliding sleeve opening adjusting action, and the reference curve is divided into 5 different time phases of high-pressure pipeline oil inlet, underground sliding sleeve hydraulic piston starting, low-pressure oil return pressure propagation after piston starting, underground sliding sleeve opening adjusting action and underground sliding sleeve opening adjusting action verification, and the curve shape and instantaneous flow numerical value change trend can be used as a judging basis for judging whether the direct hydraulic intelligent well completion underground sliding sleeve executes opening adjusting action or not under the condition that visual observation cannot be achieved.
On the basis, the opening level of the underground sliding sleeve of the direct hydraulic intelligent well completion can be determined by comparing the area of a closed graph formed by the high-pressure oil inlet instantaneous flow curve and the coordinate axis with the volume of a piston cavity corresponding to each opening level of the underground sliding sleeve. When the area of a closed graph formed by the low-pressure oil return instantaneous flow curve and the coordinate axis is equal to the area of a closed graph formed by the high-pressure oil inlet instantaneous flow curve and the coordinate axis, and the value is equal to the volume of the underground sliding sleeve piston cavity of the target opening series, the underground sliding sleeve opening adjusting action is executed in place.
Drawings
FIG. 1 is a schematic diagram of an execution reference curve of an opening adjustment action of an underground sliding sleeve;
FIG. 2 is a reference schematic diagram of downhole sliding sleeve opening adjustment actions;
In the figure: 1. a ground hydraulic device; 11. a high-pressure oil inlet instantaneous flow output port of the ground hydraulic equipment; 12. a low-pressure oil return instantaneous flow input port of the ground hydraulic equipment; 2. high pressure oil inlet control line; 3. a downhole hydraulic control sliding sleeve piston front cavity; 4. a downhole hydraulic control sliding sleeve piston; 41. the front wall surface of the underground hydraulic control sliding sleeve piston; 42. the rear wall surface of the underground hydraulic control sliding sleeve piston; 5. a rear cavity of the underground hydraulic control sliding sleeve piston; 51. the tail end of a rear cavity of the underground hydraulic control sliding sleeve piston; 6. low pressure oil return pilot line.
Detailed Description
The technical scheme of the invention is further described by specific examples.
Examples
The working principle of the invention is as follows.
As shown in fig. 1 and 2, in step S1, the ground hydraulic device 1 presses and drives the underground sliding sleeve to execute an opening adjustment action, the ground hydraulic device 1 records the output hydraulic oil instantaneous flow and the oil return instantaneous flow, and a curve of the instantaneous flow and time is displayed on an upper computer interface. The high-pressure oil inlet instantaneous flow output port 11 and the low-pressure oil return instantaneous flow input port 12 of the ground hydraulic equipment are respectively and correspondingly connected with the high-pressure oil inlet hydraulic control pipeline 2 and the low-pressure oil return hydraulic control pipeline 6 to realize oil circuit circulation.
The opening adjustment action of the underground hydraulic control sliding sleeve is divided into 5 time stages, including a high-pressure pipeline oil inlet stage, an underground hydraulic control sliding sleeve hydraulic piston starting stage, a low-pressure oil return pressure transmission stage after piston starting, an underground hydraulic control sliding sleeve opening adjustment movement stage and an underground hydraulic control sliding sleeve opening adjustment movement in-place verification stage.
In the figure 1, the corresponding curves of the time axis 1 stages 0 to T 1 are the curves of the oil inlet stage of the high-pressure pipeline;
The corresponding curve of the time axis 2 stage T 1～T2 is a curve of the starting stage of the hydraulic piston of the underground sliding sleeve;
the corresponding curve of the time axis 3 stage T 2～T3 is a low-pressure return oil pressure propagation stage curve after the sliding sleeve piston is started;
the corresponding curve of the time axis 4 stage T 3～T4 or T 3～T4' is the curve of the downhole sliding sleeve opening degree adjusting movement stage;
The corresponding curve of the time axis 5 stage T 4～T6 or T 4～T6' is a downhole sliding sleeve opening degree adjusting movement in-place verification stage curve.
The ground hydraulic device 1 is started to perform stable pressure output, and the time from the start-up to the high-pressure flow output is short, so that the high-pressure oil inlet instantaneous flow reaches the maximum value Q Feeding in max when the time is approximately determined to be 0 on the curve, namely, the point A in the figure 1.
While the pressure is stably output, the pressure wave is transmitted along the high-pressure oil inlet hydraulic pipeline 2, and when the pressure wave is not transmitted to the front wall surface 41 of the underground hydraulic sliding sleeve piston, the high-pressure oil inlet instantaneous flow keeps the maximum value Q Feeding in max to enter the high-pressure oil inlet hydraulic pipeline 2, namely an AB curve shown in fig. 1.
When the pressure wave propagates to the front wall 41 of the underground hydraulic control sliding sleeve piston, namely, the point B in fig. 1, the moment is T 1, because the friction force exists between the piston 4 and the cylinder 5, the front wall 41 begins to be pressurized, so that the pressure difference at two ends of the high-pressure oil inlet hydraulic control pipeline 2 becomes smaller along with time, and further, the high-pressure oil inlet instantaneous flow is reduced from the maximum value Q Feeding in max, namely, when the moment reaches the moment T 2, as shown in the BC curve in fig. 1, the pressure of the front wall 41 of the underground hydraulic control sliding sleeve piston is equal to the static friction force between the piston 4 and the cylinder 5, the underground hydraulic control sliding sleeve piston 4 is in a starting critical state, and the corresponding high-pressure oil inlet instantaneous flow is Q Start-up .
After the opening degree of the underground hydraulic control sliding sleeve piston 4 starts to be adjusted, the hydraulic control sliding sleeve piston 4 rapidly compresses hydraulic oil in the rear piston cavity 5, so that oil return pressure is formed in the rear piston cavity 5, the oil return pressure propagates along the rear piston cavity 5 and the low-pressure oil return pipeline 6, when the oil return pressure is transmitted to the ground, the ground hydraulic equipment 1 can monitor low-pressure oil return instantaneous flow, at the moment, the corresponding moment is T 3, namely, the pressure difference at the two ends of the high-pressure oil inlet pipeline 2 continuously decreases at the moment, namely, the high-pressure instantaneous oil inlet flow continuously decreases, namely, the CD curve in the figure 1.
Because the surface hydraulic equipment 1 can monitor the low-pressure oil return instantaneous flow at the time T3, the piston 4 still continuously compresses the hydraulic oil in the rear piston cavity 5, the oil return driving differential pressure gradually increases, the low-pressure oil return instantaneous flow gradually increases until the pressure of the front wall surface 41 of the underground hydraulic sliding sleeve piston is equal to the sum of the friction force of the underground hydraulic sliding sleeve piston 4 and the rear cavity 5 of the underground hydraulic sliding sleeve piston and the pressure of the rear wall surface 42 of the underground hydraulic sliding sleeve piston, the low-pressure oil return instantaneous flow reaches the maximum value Q Returning to max, namely the E' point at the time T 4, as shown by the solid line in fig. 1, namely the limit movement state of the underground hydraulic sliding sleeve piston 4 is just completed when the low-pressure oil return instantaneous flow reaches the maximum value Q Returning to max, the end 51 of the rear cavity of the underground hydraulic sliding sleeve piston is reached, at the moment, the high-pressure oil inlet pressure difference is further reduced along with the transfer of energy due to the fact that the oil return pressure is not complemented, and the descending trend is continued, as shown by the DE curve in fig. 1.
After the underground hydraulic control sliding sleeve piston 4 is started, the driving pressure difference of oil return is gradually increased, the low-pressure oil return instantaneous flow is gradually increased, and the low-pressure oil return instantaneous flow is in an ascending trend until the pressure of the front wall surface 41 of the underground hydraulic control sliding sleeve piston is equal to the sum of the friction force of the underground hydraulic control sliding sleeve piston 4 and the rear cavity 5 of the underground hydraulic control sliding sleeve piston and the pressure of the rear wall surface 42 of the underground hydraulic control sliding sleeve piston, the low-pressure oil return instantaneous flow reaches the maximum value Q Returning to max, and if the underground hydraulic control sliding sleeve piston 4 moves for a long time, the low-pressure oil return instantaneous flow lasts for a certain time with Q Returning to max, namely E 'F' in fig. 1. At this time, the high-pressure oil inlet instantaneous flow is also continued for a period of time with Q Balance feeding , i.e. as shown by an EF curve in fig. 1, until the underground hydraulic control sliding sleeve piston 4 completes movement, and the oil inlet and oil return instantaneous flow has a descending trend, at this time, the opening adjustment action of the hydraulic control sliding sleeve is completed.
In order to further verify that the opening degree of the underground hydraulic control sliding sleeve is accurately adjusted in place, a certain time is required to be waited continuously, and as the underground hydraulic control sliding sleeve piston 4 stops moving, the pressure of the front wall surface 41 of the underground hydraulic control sliding sleeve piston continuously increases along with the entry of hydraulic oil, and the high-pressure oil pressure difference continuously decreases until the pressure is approaching 0, namely, the pressure is shown by an ET 5 or FT 5' curve in FIG. 1; because the downhole hydraulic control sliding sleeve piston front wall surface 4 stops moving, the oil return driving pressure is not supplemented and continuously reduced, and the oil return instantaneous flow is continuously reduced until the oil return instantaneous flow tends to 0, namely, the oil return instantaneous flow is shown by an E ' T6 or F ' T 6 ' curve in fig. 1.
As shown in fig. 2, step S2 constructs a high-pressure oil-intake instantaneous flow curve and a low-pressure oil-return instantaneous flow curve as reference curves according to the data acquired in step S1, respectively.
And step S3, recording the output hydraulic oil instantaneous flow and the output oil return instantaneous flow through the ground hydraulic equipment 1, displaying the curves of the instantaneous flow and the time on an upper computer interface, and comparing the real-time curves with reference curves to realize the execution judging function of the opening degree adjusting action of the underground hydraulic control sliding sleeve. The judging method specifically comprises the following steps:
1. The method comprises the steps of realizing action driving of a direct hydraulic intelligent well completion underground sliding sleeve by pressing, monitoring and controlling an instantaneous flow change trend curve of hydraulic oil in a hydraulic control pipeline regulated by the action of the underground sliding sleeve by means of an upper computer, wherein the curve shows 5 different time-phase curves of oil inlet of a high-pressure pipeline, starting of a hydraulic piston of the underground sliding sleeve, low-pressure return oil pressure propagation after the piston is started, opening regulation movement of the underground sliding sleeve and in-place verification of opening regulation movement of the underground sliding sleeve, and judging the action execution phase of the current sliding sleeve according to the curve shape and the change trend of a reference curve;
2. The area of a closed graph formed by the high-pressure oil inlet instantaneous flow curve and the coordinate axis is equal to the volume of a piston cavity corresponding to the opening progression of a certain level of the direct hydraulic intelligent well completion underground sliding sleeve, and the opening progression of the direct hydraulic intelligent well completion underground sliding sleeve can be determined.
3. The area of a closed graph formed by the low-pressure oil return instantaneous flow curve and the coordinate axis is equal to the volume of a piston cavity corresponding to the opening progression of a certain level of the direct hydraulic intelligent well completion underground sliding sleeve, and the opening progression of the direct hydraulic intelligent well completion underground sliding sleeve can be determined.
4. When the area of a closed graph formed by the low-pressure oil return instantaneous flow curve and the coordinate axis is equal to the area of a closed graph formed by the high-pressure oil inlet instantaneous flow curve and the coordinate axis, and the value is equal to the volume of the underground sliding sleeve piston cavity of the target opening series, the opening adjustment action of the underground sliding sleeve of the direct hydraulic intelligent well completion is executed in place.
The foregoing describes the embodiments of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (5)
1. The method for judging the execution of the opening adjustment action of the underground hydraulic control sliding sleeve is characterized by comprising the following specific steps of:
s1, dividing the opening adjustment action of an underground hydraulic control sliding sleeve into different time stages, and obtaining the instantaneous flow and corresponding time of a high-pressure oil inlet pipeline and a low-pressure oil return pipeline in each stage node;
S2, respectively constructing a high-pressure oil inlet instantaneous flow curve and a low-pressure oil return instantaneous flow curve as reference curves according to the data acquired in the S1 by taking time as an abscissa and instantaneous flow as an ordinate;
S3, monitoring the instantaneous flow of the high-pressure oil inlet pipeline and the low-pressure oil return pipeline, comparing the variation trend of the instantaneous flow with a reference curve to judge the time stage corresponding to the underground hydraulic control sliding sleeve, substituting the monitored data into the high-pressure oil inlet instantaneous flow curve and the low-pressure oil return instantaneous flow curve, forming the area of a closed graph and the volume of a piston cavity corresponding to the opening stage of a certain stage of the underground hydraulic control sliding sleeve through the instantaneous flow curve and the coordinate axis, and judging the movement stage of the underground hydraulic control sliding sleeve.
2. The method for determining the execution of the opening degree adjustment action of the underground hydraulic control sliding sleeve according to claim 1, wherein the method comprises the following steps: the method comprises the steps of S1, dividing the opening adjustment action of the underground hydraulic control sliding sleeve into 5 time phases, wherein the time phases comprise a high-pressure pipeline oil inlet phase, an underground hydraulic control sliding sleeve hydraulic piston starting phase, a low-pressure oil return pressure transmission phase after piston starting, an underground hydraulic control sliding sleeve opening adjustment movement phase and an underground hydraulic control sliding sleeve opening adjustment movement in-place verification phase;
A high pressure pipeline oil inlet stage which is characterized in that when the time is close to 0 in a wireless way, the instantaneous flow rate of the high pressure oil inlet reaches a maximum value Q Feeding in max; the high-pressure oil inlet instantaneous flow keeps the maximum value Q Feeding in max to enter a high-pressure pipeline, the high-pressure instantaneous flow curve is represented as a horizontal straight line, and the low-pressure oil return instantaneous flow is 0;
The hydraulic piston of the underground hydraulic sliding sleeve starts up, the high-pressure oil inlet instantaneous flow rate in the stage has a descending trend from a maximum value Q Feeding in max, when the pressure of the front wall surface of the piston of the underground hydraulic sliding sleeve is equal to the static friction force between the piston and the cylinder body, the piston of the underground hydraulic sliding sleeve is in a starting critical state, at the moment, the corresponding high-pressure oil inlet instantaneous flow rate is Q Start-up , and the low-pressure oil return instantaneous flow rate is 0;
a low-pressure oil return pressure transmission stage after the piston is started, wherein the low-pressure oil return instantaneous flow is monitored in the stage, and the high-pressure oil inlet instantaneous flow is continuously reduced;
The opening degree of the underground hydraulic control sliding sleeve is adjusted to move, the low-pressure oil return instantaneous flow in the stage is gradually increased and is in an ascending trend until the low-pressure oil return instantaneous flow reaches a maximum value Q Returning to max, and the high-pressure oil inlet instantaneous flow is continuously reduced;
The opening degree of the underground hydraulic control sliding sleeve is adjusted to move to a verification stage in which the instantaneous flow of high-pressure oil inlet is continuously reduced until the instantaneous flow approaches to 0; the low pressure return instantaneous flow continues to decrease from a maximum value Q Returning to max until it goes to 0.
3. The method for determining the execution of the opening degree adjustment action of the underground hydraulic control sliding sleeve according to claim 1, wherein the method comprises the following steps:
and S3, forming a closed graph through the high-pressure oil inlet instantaneous flow curve and the coordinate axis, wherein the area of the formed closed graph is equal to the volume of a piston cavity corresponding to the opening level of a certain level of the underground sliding sleeve, and determining the opening level of the underground sliding sleeve.
4. The method for determining the execution of the opening degree adjustment action of the underground hydraulic control sliding sleeve according to claim 1, wherein the method comprises the following steps: s3, forming a closed graph by the low-pressure oil return instantaneous flow curve and the coordinate axis, wherein the area of the formed closed graph is equal to the volume of a piston cavity corresponding to a certain level of opening level of the underground sliding sleeve, and determining the opening level of the underground sliding sleeve.
5. The method for determining the execution of the opening degree adjustment action of the underground hydraulic control sliding sleeve according to claim 1, wherein the method comprises the following steps: and S3, when the area of a closed graph formed by the low-pressure oil return instantaneous flow curve and the coordinate axis is equal to the area of a closed graph formed by the high-pressure oil inlet instantaneous flow curve and the coordinate axis, and the value is equal to the volume of the piston cavity of the underground sliding sleeve of the target opening level, judging that the opening adjustment action of the underground sliding sleeve is executed in place.
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| CN202410189782.1A CN118110467A (en) | 2024-02-20 | 2024-02-20 | Method for judging execution of opening adjustment action of underground hydraulic control sliding sleeve |
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| CN202410189782.1A CN118110467A (en) | 2024-02-20 | 2024-02-20 | Method for judging execution of opening adjustment action of underground hydraulic control sliding sleeve |
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