CN113482571A - Hydraulic control pressure cipher open type infinite delay toe end sliding sleeve - Google Patents
Hydraulic control pressure cipher open type infinite delay toe end sliding sleeve Download PDFInfo
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- CN113482571A CN113482571A CN202110980327.XA CN202110980327A CN113482571A CN 113482571 A CN113482571 A CN 113482571A CN 202110980327 A CN202110980327 A CN 202110980327A CN 113482571 A CN113482571 A CN 113482571A
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- 238000012360 testing method Methods 0.000 claims description 139
- 238000004364 calculation method Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 description 3
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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
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
- E21B34/085—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained with time-delay systems, e.g. hydraulic impedance mechanisms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
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Abstract
The invention relates to a hydraulic control pressure password open type infinite delay toe end sliding sleeve, which comprises a body and a control unit; the device comprises a body, wherein threads are arranged at two ends of the body, a plurality of flow passages are arranged on the outer wall of the body, and a partition plate is horizontally arranged inside the body and used for partitioning a cavity inside the body; the cavity is arranged in the body and is divided into a first cavity and a second cavity by the partition plate; the first chamber comprises a first pressure chamber and a second pressure chamber, a poppet valve is arranged on one side of the first pressure chamber, a spring is arranged on one side, away from the end of the body, of the poppet valve, a piston rod is arranged on one side, away from the poppet valve, of the spring, a piston valve is arranged in the piston rod, and a position sensor is arranged at the top end of the piston rod; a pressure sensor and a pin are arranged in the second pressure bin; and the control unit is connected with the displacement sensor and the pressure sensor and used for detecting the operation data of the sliding sleeve and judging the operation condition of the sliding sleeve.
Description
Technical Field
The invention relates to the technical field of toe end sliding sleeves, in particular to a hydraulic control pressure password opening type infinite delay toe end sliding sleeve.
Background
The continuous oil first-section perforating operation is usually applied to horizontal well completion operation, but as the depth of a horizontal well is gradually increased, the operating capability of a continuous oil pipe is obviously influenced by the well depth, the horizontal section and the well track condition, the continuous oil pipe cannot adapt to the economic and efficient development trend and the technical development requirement of a deep-layer and long-horizontal-section shale gas well in the future, and the application of a toe-end sliding sleeve technology is gradually improved along with the trend.
The toe end sliding sleeve is connected with the production casing to form a part of the well entering pipe string to be simultaneously put into an open hole well section, after well cementation operation is finished, casing pressure test can be carried out, the sliding sleeve is opened to finish first-stage fracturing, a pumping flow channel is provided for subsequent bridge plug perforation continuous operation, and therefore expensive oil continuous perforation cost is saved.
The existing toe end sliding sleeve cannot carry out casing pipe pressure testing according to a standard flow when in use, is opened in a throttling mode in a delayed mode, can accompany pressure drop in the execution process of a delay mechanism, cannot accurately control the pressure testing process and the operation condition of the sliding sleeve when in pressure testing, influences a casing pipe pressure testing conclusion, is limited in time delay and low in fault tolerance rate, and has the risk of opening in advance.
Disclosure of Invention
Therefore, the invention provides a hydraulic control pressure password opening type infinite delay toe end sliding sleeve which is used for overcoming the problems that a pressure test process and the operation condition of the sliding sleeve cannot be accurately controlled during pressure test in the prior art, a casing pressure test conclusion is influenced, and the fault tolerance rate is low.
In order to achieve the above object, the present invention provides a hydraulic control pressure password open type infinite delay toe end sliding sleeve, comprising:
the device comprises a body, wherein threads are arranged at two ends of the body, a plurality of flow passages are arranged on the outer wall of the body, and a partition plate is horizontally arranged inside the body and used for partitioning a cavity inside the body;
the cavity is arranged in the body and is divided into a first cavity and a second cavity by the partition plate; the first chamber comprises a first pressure chamber and a second pressure chamber, a poppet valve is arranged on one side of the first pressure chamber, a spring is arranged on one side, away from the end of the body, of the poppet valve, a piston rod is arranged on one side, away from the poppet valve, of the spring, a piston valve is arranged in the piston rod, and a position sensor is arranged at the top end of the piston rod; a pressure sensor and a pin are arranged in the second pressure bin;
the control unit is connected with the displacement sensor and the pressure sensor and used for detecting the operation data of the sliding sleeve and judging the operation condition of the sliding sleeve;
the control unit is preset with a standard second pressure chamber test pressure value range Fb0, when pressure testing is carried out, the pressure sensor detects an actual pressure value Fb in the second pressure chamber, after detection is completed, the control unit compares the actual pressure value Fb with parameters in a standard second pressure chamber test pressure value range Fb0 preset by the control unit and selects and adjusts the opening degree of the piston valve according to a comparison result, if Fb belongs to Fb0, the control unit judges that the pressure value in the second pressure chamber meets the pressure testing standard and does not adjust the piston valve, if Fb ∉ Fb0, the control unit judges that the pressure value of the second pressure chamber does not meet the pressure testing standard and calculates a pressure value difference value delta Fb, and after calculation is completed, the control unit adjusts the opening degree value F of the piston valve to a corresponding value according to the difference value.
Further, for the standard second pressure chamber test pressure value range Fb0, Fb0 (Fbmin, Fbmax) is set, wherein Fbmin is the standard second pressure chamber minimum test pressure value, Fbmax is the standard second pressure chamber maximum test pressure value, when the control unit compares the actual pressure value Fb in the second pressure chamber with the parameter in the standard second pressure chamber test pressure value range Fb0 preset by the control unit during the pressure test,
if Fb belongs to Fb0 and Fb is larger than Fbmax, the control unit judges that the pressure value of the second pressure bin does not accord with the pressure test standard and calculates a pressure value difference value delta Fb, and sets the pressure value difference value delta Fb = Fb-Fbmax;
the control unit is further provided with a first pressure difference Δ Fb1, a second pressure difference Δ Fb2, a third pressure difference Δ Fb3, a first piston valve opening adjustment coefficient α 1, a second piston valve opening adjustment coefficient α 2, a third piston valve opening adjustment coefficient α 3 and a fourth piston valve opening adjustment coefficient α 4, wherein Δ Fb1 < [ delta ] Fb2 < [ delta ] Fb3, α 1 < α 2 < α 3 < α 4 and α 1+ α 2+ α 3+ α 4= 1;
if delta Fb is less than delta Fb1, the control unit selects a first piston valve opening adjusting coefficient alpha 1 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than delta Fb1 and less than delta Fb2, the control unit selects a second piston valve opening adjusting coefficient alpha 2 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than delta Fb3 and less than delta Fb3, the control unit selects a third piston valve opening adjusting coefficient alpha 3 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than or equal to the delta Fb3, the control unit selects a fourth piston valve opening adjusting coefficient alpha 4 to adjust the piston valve opening to a corresponding value;
when the control unit selects the opening adjusting coefficient alpha i of the ith piston valve to adjust the opening of the piston valve to a corresponding value, setting i =1,2,3,4, and setting F' = F-F × alpha i by setting the opening of the piston valve after adjustment as F
Further, when the control unit compares the actual pressure value Fb in the second pressure chamber with the parameter in the standard second pressure chamber test pressure value range Fb0 preset by the control unit during the pressure test,
if Fb ∉ Fb and Fb is less than Fbmin, the control unit judges that the pressure value of the second pressure bin does not meet the pressure test standard and calculates a pressure value difference value delta Fb ', setting delta Fb' = Fbmax-Fb, and after the calculation is finished, the control unit selects an opening adjusting coefficient of a corresponding piston valve according to the difference value to increase the opening F of the piston valve, wherein F represents the actual opening value of the piston valve;
if Δ Fb' <Δfb1, the control unit selects a first piston valve opening adjustment coefficient α 1 to adjust the piston valve opening to a corresponding value;
if the delta Fb1 is less than or equal to the delta Fb' <thedelta Fb2, the control unit selects a second piston valve opening adjusting coefficient alpha 2 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than delta Fb3 and less than delta Fb3, the control unit selects a third piston valve opening adjusting coefficient alpha 3 to adjust the piston valve opening to a corresponding value;
if the delta Fb' is not less than the delta Fb3, the control unit selects a fourth piston valve opening adjusting coefficient alpha 4 to adjust the piston valve opening to a corresponding value;
when the control unit selects the ith piston valve opening adjustment coefficient α i to adjust the piston valve opening to a corresponding value, i =1,2,3,4 is set, and the control unit marks the adjusted piston valve opening as F = F + F × α i.
Further, the control unit still is provided with piston valve opening maximum Fmax, works as when the control unit judges that the opening that needs the piston valve adjusts to F ", the control unit compares piston valve opening F" after adjusting with piston valve opening maximum Fmax, if F "> Fmax and Fb < Fbmin, the control unit judges the sliding sleeve leakproofness is not enough and sends alarm signal in order to indicate to install the sliding sleeve again, if F" ≦ Fmax, the control unit adjusts the piston valve opening to F ".
Further, the control unit still is provided with piston valve opening minimum Fmin, works as the control unit judges that the opening that needs the piston valve is adjusted to F ', control unit compares piston opening F ' after adjusting with piston valve opening minimum Fmin, if F ' < Fmin and Fb > Fbmax, the control unit judges the sliding sleeve trouble and sends alarm signal in order to stop the pressure testing experiment, if F ' ≧ Fmin, the control unit adjusts the piston valve opening to F '.
Further, when the control unit determines that Fb belongs to Fb0, the position sensor detects the actual moving distance S of the piston rod, after the detection is completed, the control unit calculates the preset moving distance S0 of the piston rod according to the actual pressure value Fb of the second pressure chamber detected by the pressure sensor, and sets S0= Fb × Smax/Fmax, after the calculation is completed, the control unit compares the actual moving distance S of the piston rod with the preset moving distance S0 and determines whether the moving distance of the piston rod meets the test standard according to the comparison result, wherein Smax is the maximum moving distance of the piston rod;
if S = S0, the piston rod moving distance of the control unit meets the test standard;
if S is not equal to S0, the control unit enables the piston rod moving distance to be not in accordance with the test standard.
Further, when the control unit judges that the moving distance of the piston rod does not meet the standard, the control unit calculates the difference value Delta S of the moving distance of the piston rod, sets the difference value Delta S = | S-S0|, and after the calculation is finished, the control unit compares the difference value with a preset moving distance difference value and judges the fault condition of the sliding sleeve according to the comparison result;
the control unit is also preset with a first moving distance difference Delta S1, a second moving distance difference Delta S2 and a third moving distance difference Delta S3, wherein Delta S1 < [ delta ] S2 < [ delta ] S3;
if delta S is less than delta S1, the control unit judges that the sliding sleeve has no fault;
if the delta S is not less than delta S1 and not more than delta S2, the control unit judges that the sliding sleeve has slight fault;
if the delta S is less than or equal to delta S2 and the delta S1, the control unit judges that the sliding sleeve has a primary fault;
if delta S > -delta S3, the control unit judges that the sliding sleeve has a secondary fault.
Further, when the control unit judges that the sliding sleeve is in a primary fault, the control unit sends a reminding signal and starts manual work for further judgment, and when the control unit judges that the sliding sleeve is in a secondary fault, the control unit sends a fault alarm signal and prompts to replace the sliding sleeve.
Further, the control unit is further provided with a maximum adjusting frequency N0, when the control unit adjusts the opening degree of the piston valve, the control unit records the adjusting frequency as N, when the control unit completes one adjusting of the opening degree of the piston valve, the control unit records the adjusting frequency as N =1, when the control unit completes the j adjusting for the j, j =1,2,3, and N, and the control unit sets N = j, and when the control unit determines N = N0 and Fb ∉ Fb0, the control unit determines that the pressure test fails and re-determines the standard second pressure chamber test pressure value range Fb 0.
Compared with the prior art, the invention has the advantages that specifically, a control unit is arranged, a standard second pressure chamber test pressure value range Fb0 is preset in the control unit, the pressure sensor detects the actual pressure value Fb in the second pressure chamber when pressure testing is carried out, after the detection is finished, the control unit compares the actual pressure value Fb in the second pressure chamber with the parameter in the standard second pressure chamber test pressure value range Fb0 preset by the control unit, the actual pressure value is compared with the standard pressure value range by the control unit, the pressure test can be accurately carried out, meanwhile, the invention can carry out multiple times of infinite time pressure testing tests by arranging the structures of the pressure chamber, the lift valve, the piston rod, the piston valve, the spring, the pin and the like, the fault tolerance rate of the test tests is improved, and casing pressure testing can be realized, and further, the control unit is used for controlling the pressure test, so that the accuracy of the pressure test is ensured, and the fault tolerance of operation is improved again.
Further, when the control unit compares the actual pressure value Fb in the second pressure bin with the parameter in the standard second pressure bin test pressure value range Fb0 preset by the control unit during the pressure test, if Fb belongs to Fb0 and Fb is greater than Fbmax, the control unit judges that the pressure value of the second pressure bin does not meet the pressure test standard and calculates a pressure value difference value Δ Fb, after the calculation is completed, the control unit selects a corresponding piston valve opening adjusting coefficient according to the difference value to reduce the piston valve opening F, so that the pressure test can be accurately performed, the fault-tolerant rate of the test is improved while the accurate pressure test is performed, the control unit further performs the pressure test to control the pressure test, the accuracy of the pressure test is ensured, and the fault-tolerant rate of the operation is improved again.
Further, when the control unit compares the actual pressure value Fb in the second pressure bin with the parameter in the standard second pressure bin test pressure value range Fb0 preset by the control unit during the pressure test, if Fb belongs to Fb0 and Fb is less than Fbmin, the control unit determines that the pressure value of the second pressure bin does not meet the pressure test standard and calculates a pressure value difference value Δ Fb', and after the calculation is completed, the control unit selects the corresponding piston valve opening adjustment coefficient according to the difference value to reduce the piston valve opening F, so that the pressure test can be accurately performed.
Furthermore, the control unit is further provided with a maximum opening Fmax of the piston valve, when the control unit judges that the opening of the piston valve needs to be adjusted to F ', the control unit compares the adjusted opening F' of the piston valve with the maximum opening Fmax of the piston valve, and through adjustment of the opening of the piston valve, the experimental pressure can be accurately controlled, so that while an accurate pressure test is carried out, the fault tolerance rate of the test is improved, the pressure test is further controlled through the control unit, the accuracy rate of the pressure test is ensured, and the fault tolerance rate of operation is improved again.
Furthermore, the control unit is further provided with a maximum piston valve opening value Fmin, when the control unit judges that the opening of the piston valve is required to be adjusted to F ', the control unit compares the adjusted piston valve opening F' with the minimum piston valve opening value Fmin, the experiment pressure can be accurately controlled by adjusting the opening of the piston valve, the fault tolerance rate of the experiment is improved while the accurate pressure test is carried out, the pressure test is further controlled by the control unit, the accuracy rate of the pressure test is ensured, and the fault tolerance rate of the operation is improved again.
Furthermore, the control unit in the invention also presets the preset moving distance S0 of the piston rod, the experimental pressure can be accurately controlled by comparing the actual moving distances of the piston rod, the fault-tolerant rate of the experimental test is improved while the accurate pressure test is carried out, the pressure test is further controlled by the control unit, the accuracy rate of the pressure test is ensured, and the fault-tolerant rate of the operation is improved again.
Furthermore, a moving distance difference value is preset in a control unit, the control unit judges whether the sliding sleeve has a fault according to the moving distance difference value of the piston rod, the operating state of the sliding sleeve can be judged more accurately through judging the operating state of the sliding sleeve, the normal operation of a subsequent fracturing step can be ensured through controlling the operating state of the sliding sleeve, and the loss caused by the fault of the sliding sleeve is effectively reduced.
Drawings
FIG. 1 is a schematic view of the structure of the hydraulic control pressure cipher opening type infinite delay toe end sliding sleeve of the present invention;
FIG. 2 is a schematic structural view of the hydraulic control pressure cipher opening type infinite delay toe end sliding sleeve of the present invention;
fig. 3 is a structural view of the interior of the first pressure chamber of the hydraulic control pressure password-opening infinite delay toe end sliding sleeve of the invention.
Reference numerals: 1-thread bushing, 2-body, 3-lift valve, 4-piston rod, 5-piston valve, 6-pressure bin, 7-spring, 8-flow channel, 9-pin and 10-clapboard.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-3, a schematic view of a hydraulic control pressure password-unlocked infinite delay toe end sliding sleeve according to an embodiment of the present invention includes a body and a control unit;
the device comprises a body 2, wherein both ends of the body are provided with threads 1 for being in threaded connection with a sleeve; the outer wall of the body 2 is provided with a plurality of passages 8, the number of the passages can be 1 or 2, and the number of the passages is preferably 5 as long as the actual requirement can be met; the inside level of body is provided with baffle 10, separates the body into two upper and lower cavities, and wherein, the first cavity is the pressure chamber, and the second cavity is non-pressure chamber.
As shown in fig. 1, the pressure chamber includes a first pressure chamber and a second pressure chamber, the first pressure chamber includes a poppet valve 3 disposed at one side of the first pressure chamber, a spring 7 disposed at one side far from the poppet valve, a piston rod 4 connected to the spring, and a piston valve 5 connected to the piston rod, and a position sensor (not shown) is disposed at a top end of the piston rod 4; the second pressure chamber comprises a pressure sensor (not shown) and a pin 9 arranged inside the second pressure chamber. When the pressure testing device works, the lifting valve is pressed to be opened, pressure is transmitted to the first pressure bin, the piston rod is pushed to drive the piston valve to move, after pressure testing is finished, the spring resets after pressure relief, the piston rod is pushed in the direction to drive the piston valve to move, the pressure is increased to the opening value of the sliding sleeve, the piston rod is pushed to drive the piston valve to move to the maximum value, the piston valve is locked, the pressure is transmitted to the second pressure bin, the pin is sheared after being pressed, and the sliding sleeve is opened and locked.
The control unit (not shown in the figure) is connected with the displacement sensor and the pressure sensor and is used for detecting the operation data of the sliding sleeve and judging the operation condition of the sliding sleeve;
the control unit is preset with a standard second pressure chamber test pressure value range Fb0, when pressure testing is carried out, the pressure sensor detects an actual pressure value Fb in the second pressure chamber, after detection is completed, the control unit compares the actual pressure value Fb with parameters in a standard second pressure chamber test pressure value range Fb0 preset by the control unit and selects and adjusts the opening degree of the piston valve according to a comparison result, if Fb belongs to Fb0, the control unit judges that the pressure value in the second pressure chamber meets the pressure testing standard and does not adjust the piston valve, if Fb ∉ Fb0, the control unit judges that the pressure value of the second pressure chamber does not meet the pressure testing standard and calculates a pressure value difference value delta Fb, and after calculation is completed, the control unit adjusts the opening degree value F of the piston valve to a corresponding value according to the difference value.
Specifically, the control unit is arranged, the standard second pressure chamber test pressure value range Fb0 is preset in the control unit, the pressure sensor detects the actual pressure value Fb in the second pressure chamber when pressure testing is carried out, after the detection is finished, the control unit compares the actual pressure value Fb in the second pressure chamber with the parameter in the standard second pressure chamber test pressure value range Fb0 preset in the control unit, the actual pressure value is compared with the standard pressure value range through the control unit, the pressure test can be accurately carried out, meanwhile, the pressure testing device can carry out multiple times of pressure testing without time limit through arranging the structures of the pressure chamber, a poppet valve, a piston rod, a piston valve, a spring, a pin and the like, the fault tolerance of the test is improved, casing pipe pressure testing can be realized, and further the control unit is used for carrying out pressure testing, the accuracy of the pressure test is ensured, and the fault-tolerant rate of the operation is improved again.
Specifically, for the standard second pressure chamber test pressure value range Fb0, Fb0 (Fbmin, Fbmax) is set, wherein Fbmin is the minimum value of the standard second pressure chamber test pressure value range, Fbmax is the maximum value of the standard second pressure chamber test pressure value range, when the control unit compares the actual pressure value Fb in the second pressure chamber with the parameter in the standard second pressure chamber test pressure value range Fb0 preset by the control unit during the pressure test,
if Fb belongs to Fb0 and Fb is larger than Fbmax, the control unit judges that the pressure value of the second pressure bin does not accord with the pressure test standard and calculates a pressure value difference value delta Fb, and sets the pressure value difference value delta Fb = Fb-Fbmax;
the control unit is further provided with a first pressure difference Δ Fb1, a second pressure difference Δ Fb2, a third pressure difference Δ Fb3, a first piston valve opening adjustment coefficient α 1, a second piston valve opening adjustment coefficient α 2, a third piston valve opening adjustment coefficient α 3 and a fourth piston valve opening adjustment coefficient α 4, wherein Δ Fb1 < [ delta ] Fb2 < [ delta ] Fb3, α 1 < α 2 < α 3 < α 4 and α 1+ α 2+ α 3+ α 4= 1;
if delta Fb is less than delta Fb1, the control unit selects a first piston valve opening adjusting coefficient alpha 1 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than delta Fb1 and less than delta Fb2, the control unit selects a second piston valve opening adjusting coefficient alpha 2 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than delta Fb3 and less than delta Fb3, the control unit selects a third piston valve opening adjusting coefficient alpha 3 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than or equal to the delta Fb3, the control unit selects a fourth piston valve opening adjusting coefficient alpha 4 to adjust the piston valve opening to a corresponding value;
when the control unit selects the ith piston valve opening adjustment coefficient α i to adjust the piston valve opening to a corresponding value, i =1,2,3,4 is set, and the control unit records the adjusted piston valve opening as F 'and sets F' = F-F × α i.
Specifically, when a pressure test is performed, when the control unit compares an actual pressure value Fb in the second pressure bin with a parameter in a standard second pressure bin test pressure value range Fb0 preset by the control unit, if Fb belongs to Fb0 and Fb is greater than Fbmax, the control unit judges that the pressure value of the second pressure bin does not meet the pressure test standard and calculates a pressure value difference value Δ Fb, after the calculation is completed, the control unit selects a corresponding piston valve opening adjustment coefficient according to the difference value to reduce the piston valve opening F, so that the pressure test can be performed accurately, the fault tolerance of the test is improved while the accurate pressure test is performed, the control unit is further used for controlling the pressure test, the accuracy of the pressure test is ensured, and the fault tolerance of operation is improved again.
Specifically, when the control unit compares the actual pressure value Fb in the second pressure chamber with the parameter in the standard second pressure chamber test pressure value range Fb0 preset by the control unit during the pressure test,
if Fb ∉ Fb and Fb is less than Fbmin, the control unit judges that the pressure value of the second pressure bin does not meet the pressure test standard and calculates a pressure value difference value delta Fb ', setting delta Fb' = Fbmax-Fb, and after the calculation is finished, the control unit selects an opening adjusting coefficient of a corresponding piston valve according to the difference value to increase the opening F of the piston valve, wherein F represents the actual opening value of the piston valve;
if Δ Fb' <Δfb1, the control unit selects a first piston valve opening adjustment coefficient α 1 to adjust the piston valve opening to a corresponding value;
if the delta Fb1 is less than or equal to the delta Fb' <thedelta Fb2, the control unit selects a second piston valve opening adjusting coefficient alpha 2 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than delta Fb3 and less than delta Fb3, the control unit selects a third piston valve opening adjusting coefficient alpha 3 to adjust the piston valve opening to a corresponding value;
if the delta Fb' is not less than the delta Fb3, the control unit selects a fourth piston valve opening adjusting coefficient alpha 4 to adjust the piston valve opening to a corresponding value;
when the control unit selects the ith piston valve opening adjustment coefficient α i to adjust the piston valve opening to a corresponding value, i =1,2,3,4 is set, and the control unit marks the adjusted piston valve opening as F = F + F × α i.
Specifically, when a pressure test is performed, when the control unit compares an actual pressure value Fb in the second pressure bin with a parameter in a standard second pressure bin test pressure value range Fb0 preset by the control unit, if Fb belongs to Fb0 and Fb is less than Fbmin, the control unit determines that the pressure value of the second pressure bin does not meet the pressure test standard and calculates a pressure value difference value Δ Fb', and after the calculation is completed, the control unit selects a corresponding piston valve opening adjustment coefficient according to the difference value to reduce the piston valve opening F, so that the pressure test can be performed accurately.
Specifically, the control unit is further provided with a maximum piston valve opening Fmax, when the control unit judges that the opening of the piston valve is required to be adjusted to F ', the control unit compares the adjusted piston valve opening F ' with the maximum piston valve opening Fmax, if F ' > Fmax and Fb < Fbmin, the control unit judges that the sealing performance of the sliding sleeve is insufficient and sends out an alarm signal to prompt the sliding sleeve to be reinstalled, and if F ' > Fmax, the control unit adjusts the opening of the piston valve to F '.
Specifically, the control unit is further provided with a maximum opening Fmax of the piston valve, when the control unit judges that the opening of the piston valve needs to be adjusted to be F ', the control unit compares the adjusted opening F' of the piston valve with the maximum opening Fmax of the piston valve, and the experimental pressure can be accurately controlled by adjusting the opening of the piston valve, so that the fault tolerance rate of the test is improved while the accurate pressure test is carried out, the pressure test is further controlled by the control unit, the accuracy rate of the pressure test is ensured, and the fault tolerance rate of the operation is improved again.
Specifically, the control unit is further provided with a minimum piston valve opening value Fmin, when the control unit judges that the opening of the piston valve is required to be adjusted to F ', the control unit compares the adjusted piston opening value F ' with the minimum piston valve opening value Fmin, if F ' < Fmin and Fb > Fbmax, the control unit judges that the sliding sleeve has faults and sends out a reminding signal to stop a pressure test, and if F ' > Fmin, the control unit adjusts the opening of the piston valve to F '.
Specifically, the control unit is further provided with a maximum piston valve opening value Fmin, when the control unit judges that the opening of the piston valve needs to be adjusted to F ', the control unit compares the adjusted piston valve opening F' with the minimum piston valve opening value Fmin, and the experimental pressure can be accurately controlled by adjusting the opening of the piston valve, so that the fault tolerance rate of the test is improved while the accurate pressure test is carried out, the pressure test is further controlled by the control unit, the accuracy rate of the pressure test is ensured, and the fault tolerance rate of the operation is improved again.
Specifically, when the control unit determines that Fb belongs to Fb0, the position sensor detects the actual moving distance S of the piston rod, after the detection is completed, the control unit calculates the preset moving distance S0 of the piston rod according to the actual pressure value Fb of the second pressure chamber detected by the pressure sensor, and sets S0= Fb × Smax/Fmax, after the calculation is completed, the control unit compares the actual moving distance S of the piston rod with the preset moving distance S0 and determines whether the piston rod moving distance meets the test standard according to the comparison result, wherein Smax is the maximum value of the piston rod moving distance;
if S = S0, the piston rod moving distance of the control unit meets the test standard;
if S is not equal to S0, the control unit enables the piston rod moving distance to be not in accordance with the test standard.
Specifically, the control unit in the invention also presets the preset moving distance S0 of the piston rod, the experimental pressure can be accurately controlled by comparing the actual moving distances of the piston rod, the fault-tolerant rate of the experimental test is improved while the accurate pressure test is carried out, the pressure test is further controlled by the control unit, the accuracy of the pressure test is ensured, and the fault-tolerant rate of the operation is improved again.
Specifically, when the control unit determines that the piston rod moving distance does not meet the standard, the control unit calculates a difference value Δ S of the piston rod moving distance, sets Δ S = | S-S0|, and after calculation is completed, the control unit compares the difference value with a preset moving distance difference value and determines the fault condition of the sliding sleeve according to the comparison result;
the control unit is also preset with a first moving distance difference Delta S1, a second moving distance difference Delta S2 and a third moving distance difference Delta S3, wherein Delta S1 < [ delta ] S2 < [ delta ] S3;
if delta S is less than delta S1, the control unit judges that the sliding sleeve has no fault;
if the delta S is not less than delta S1 and not more than delta S2, the control unit judges that the sliding sleeve has slight fault;
if the delta S is less than or equal to delta S2 and the delta S1, the control unit judges that the sliding sleeve has a primary fault;
if delta S > -delta S3, the control unit judges that the sliding sleeve has a secondary fault.
Specifically, the control unit in the invention presets a moving distance difference, the control unit judges whether the sliding sleeve has a fault according to the moving distance difference of the piston rod, the operating state of the sliding sleeve can be more accurately judged by judging the operating state of the sliding sleeve, the normal operation of the subsequent fracturing step can be ensured by controlling the operating state of the sliding sleeve, and the loss caused by the fault of the sliding sleeve is effectively reduced.
Specifically, when the control unit judges that the sliding sleeve is a primary fault, the control unit sends a reminding signal and starts manual work to further judge, and when the control unit judges that the sliding sleeve is a secondary fault, the control unit sends a fault alarm signal and prompts to replace the sliding sleeve.
Specifically, the control unit is further provided with a maximum adjusting frequency N0, when the control unit adjusts the opening degree of the piston valve, the control unit records the adjusting frequency as N, when the control unit completes one adjustment of the opening degree of the piston valve, the control unit records the adjusting frequency as N =1, when the control unit completes the j adjustment, j =1,2,3,.. once, N is set, the control unit sets N = j, and when the control unit determines N = N0 and Fb ∉ Fb0, the control unit determines that the pressure test fails and re-determines the standard second pressure chamber test pressure value range Fb 0.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A hydraulic control pressure password open type infinite delay toe end sliding sleeve is characterized by comprising;
the device comprises a body, wherein threads are arranged at two ends of the body, a plurality of flow passages are arranged on the outer wall of the body, and a partition plate is horizontally arranged inside the body and used for partitioning a cavity inside the body;
the cavity is arranged in the body and is divided into a first cavity and a second cavity by the partition plate; the first chamber comprises a first pressure chamber and a second pressure chamber, a poppet valve is arranged on one side of the first pressure chamber, a spring is arranged on one side, away from the end of the body, of the poppet valve, a piston rod is arranged on one side, away from the poppet valve, of the spring, a piston valve is arranged in the piston rod, and a position sensor is arranged at the top end of the piston rod; a pressure sensor and a pin are arranged in the second pressure bin;
the control unit is connected with the displacement sensor and the pressure sensor and used for detecting the operation data of the sliding sleeve and judging the operation condition of the sliding sleeve;
the control unit is preset with a standard second pressure chamber test pressure value range Fb0, when pressure testing is carried out, the pressure sensor detects an actual pressure value Fb in the second pressure chamber, after detection is completed, the control unit compares the actual pressure value Fb with parameters in a standard second pressure chamber test pressure value range Fb0 preset by the control unit and selects and adjusts the opening degree of the piston valve according to a comparison result, if Fb belongs to Fb0, the control unit judges that the pressure value in the second pressure chamber meets the pressure testing standard and does not adjust the piston valve, if Fb ∉ Fb0, the control unit judges that the pressure value of the second pressure chamber does not meet the pressure testing standard and calculates a pressure value difference value delta Fb, and after calculation is completed, the control unit adjusts the opening degree value F of the piston valve to a corresponding value according to the difference value.
2. The hydraulic control pressure password opening type infinite delay toe end sliding sleeve as claimed in claim 1, wherein for the standard second pressure chamber test pressure value range Fb0, Fb0 (Fbmin, Fbmax) is set, wherein Fbmin is the standard second pressure chamber minimum test pressure, Fbmax is the standard second pressure chamber maximum test pressure, when the control unit compares the actual pressure value Fb in the second pressure chamber with the parameter in the standard second pressure chamber test pressure value range Fb0 preset by the control unit during the pressure test,
if Fb ∉ Fb0 and Fb is larger than Fbmax, the control unit judges that the pressure value of the second pressure bin does not meet the pressure test standard and calculates a pressure value difference value delta Fb, and sets the pressure value difference value delta Fb = Fb-Fbmax;
the control unit is further provided with a first pressure difference Δ Fb1, a second pressure difference Δ Fb2, a third pressure difference Δ Fb3, a first piston valve opening adjustment coefficient α 1, a second piston valve opening adjustment coefficient α 2, a third piston valve opening adjustment coefficient α 3 and a fourth piston valve opening adjustment coefficient α 4, wherein Δ Fb1 < [ delta ] Fb2 < [ delta ] Fb3, α 1 < α 2 < α 3 < α 4 and α 1+ α 2+ α 3+ α 4= 1;
if delta Fb is less than delta Fb1, the control unit selects a first piston valve opening adjusting coefficient alpha 1 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than delta Fb1 and less than delta Fb2, the control unit selects a second piston valve opening adjusting coefficient alpha 2 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than delta Fb3 and less than delta Fb3, the control unit selects a third piston valve opening adjusting coefficient alpha 3 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than or equal to the delta Fb3, the control unit selects a fourth piston valve opening adjusting coefficient alpha 4 to adjust the piston valve opening to a corresponding value;
when the control unit selects the ith piston valve opening adjustment coefficient α i to adjust the piston valve opening to a corresponding value, i =1,2,3,4 is set, and the control unit records the adjusted piston valve opening as F 'and sets F' = F-F × α i.
3. The hydraulic control pressure password opening type infinite delay toe end sliding sleeve as claimed in claim 2, wherein when the control unit compares the actual pressure value Fb in the second pressure chamber with the parameter in the standard second pressure chamber test pressure value range Fb0 preset by the control unit during the pressure test,
if Fb ∉ Fb and Fb is less than Fbmin, the control unit judges that the pressure value of the second pressure bin does not meet the pressure test standard and calculates a pressure value difference value delta Fb ', and sets delta Fb' = Fbmin-Fb;
if Δ Fb' <Δfb1, the control unit selects a first piston valve opening adjustment coefficient α 1 to adjust the piston valve opening to a corresponding value;
if the delta Fb1 is less than or equal to the delta Fb' <thedelta Fb2, the control unit selects a second piston valve opening adjusting coefficient alpha 2 to adjust the piston valve opening to a corresponding value;
if the delta Fb is not less than delta Fb3 and less than delta Fb3, the control unit selects a third piston valve opening adjusting coefficient alpha 3 to adjust the piston valve opening to a corresponding value;
if the delta Fb' is not less than the delta Fb3, the control unit selects a fourth piston valve opening adjusting coefficient alpha 4 to adjust the piston valve opening to a corresponding value;
when the control unit selects the ith piston valve opening adjustment coefficient α i to adjust the piston valve opening to a corresponding value, i =1,2,3,4 is set, and the control unit marks the adjusted piston valve opening as F = F + F × α i.
4. The hydraulically-controlled pressure password-opening infinite delay toe-end sliding sleeve as claimed in claim 3, wherein the control unit is further provided with a maximum piston valve opening Fmax, when the control unit determines that the opening of the piston valve is required to be adjusted to F ", the control unit compares the adjusted piston valve opening F" with the maximum piston valve opening Fmax, if F "> Fmax and Fb < Fbmin, the control unit determines that the sealing performance of the sliding sleeve is insufficient and sends an alarm signal to prompt the sliding sleeve to be reinstalled, and if F" ≦ Fmax, the control unit adjusts the piston valve opening to F ".
5. The hydraulically-controlled pressure password-opening infinite delay toe end sliding sleeve as claimed in claim 4, wherein the control unit is further provided with a minimum piston valve opening Fmin, when the control unit determines that the opening of the piston valve is required to be adjusted to F ', the control unit compares the adjusted piston opening F ' with the minimum piston valve opening Fmin, if F ' < Fmin and Fb > Fbmax, the control unit determines that the sliding sleeve is faulty and sends out a prompt signal to stop the pressure test, and if F ' ≧ Fmin, the control unit adjusts the piston valve opening to F '.
6. The hydraulically-controlled pressure password-unlocked infinite delay toe-end sliding sleeve as claimed in claim 5, wherein when the control unit determines Fb e Fb0, the position sensor detects the actual moving distance S of the piston rod, after the detection is completed, the control unit calculates the preset moving distance S0 of the piston rod according to the actual pressure value Fb of the second pressure chamber detected by the pressure sensor, sets S0= Fb x Smax/Fmax, and after the calculation is completed, the control unit compares the actual moving distance S of the piston rod with the preset moving distance S0 and determines whether the piston rod moving distance meets the test standard according to the comparison result, wherein Smax is the maximum value of the piston rod moving distance;
if S = S0, the piston rod moving distance of the control unit meets the test standard;
if S is not equal to S0, the control unit enables the piston rod moving distance to be not in accordance with the test standard.
7. The hydraulically-controlled pressure password-unlocked infinite delay toe sliding sleeve as claimed in claim 6, wherein when the control unit determines that the piston rod movement distance does not meet the standard, the control unit calculates the piston rod movement distance difference Δ S, sets Δ S = | S-S0|, and after the calculation is completed, the control unit compares the difference with a preset movement distance difference and determines the sliding sleeve fault condition according to the comparison result;
the control unit is also preset with a first moving distance difference Delta S1, a second moving distance difference Delta S2 and a third moving distance difference Delta S3, wherein Delta S1 < [ delta ] S2 < [ delta ] S3;
if delta S is less than delta S1, the control unit judges that the sliding sleeve has no fault;
if the delta S is not less than delta S1 and not more than delta S2, the control unit judges that the sliding sleeve has slight fault;
if the delta S is less than or equal to delta S3 and the delta S2, the control unit judges that the sliding sleeve has a primary fault;
if delta S > -delta S3, the control unit judges that the sliding sleeve has a secondary fault.
8. The hydraulically controlled pressure password-unlocked infinite delay toe-end sliding sleeve as claimed in claim 7, wherein when the control unit determines that the sliding sleeve is in a primary fault, the control unit sends a warning signal and starts manual further determination, and when the control unit determines that the sliding sleeve is in a secondary fault, the control unit sends a fault warning signal and prompts replacement of the sliding sleeve.
9. The hydraulic control pressure password opening type infinite delay toe end sliding sleeve according to claim 8, wherein the control unit is further provided with a maximum adjusting time number N0, when the control unit adjusts the opening degree of the piston valve, the control unit records the adjusting time number as N, when the control unit completes one adjustment of the opening degree of the piston valve, the control unit records the adjusting time number as N =1, when the control unit completes the j adjustment, j =1,2,3,.. once.n is set, the control unit sets N = j, when the control unit determines N = N0 and Fb ∉ Fb0, the control unit determines that the pressure test fails and re-determines a standard second pressure chamber test pressure value range Fb 0.
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| CN118065820A (en) * | 2024-04-17 | 2024-05-24 | 大庆长垣能源科技有限公司 | Piezoelectric switch control toe end sliding sleeve based on precoding uniqueness identification |
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| CN113482571B (en) | 2021-12-21 |
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