CN114658380A - Shutoff type vibration well cementation device - Google Patents
Shutoff type vibration well cementation device Download PDFInfo
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- CN114658380A CN114658380A CN202210193512.9A CN202210193512A CN114658380A CN 114658380 A CN114658380 A CN 114658380A CN 202210193512 A CN202210193512 A CN 202210193512A CN 114658380 A CN114658380 A CN 114658380A
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- 238000002347 injection Methods 0.000 claims abstract description 107
- 239000007924 injection Substances 0.000 claims abstract description 107
- 239000004568 cement Substances 0.000 claims abstract description 90
- 239000002002 slurry Substances 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 20
- 101100070241 Mus musculus Hcn2 gene Proteins 0.000 claims description 6
- 101100314583 Mus musculus Trim3 gene Proteins 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000007711 solidification Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000007306 turnover Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011440 grout Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
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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
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- Mining & Mineral Resources (AREA)
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- Sliding-Contact Bearings (AREA)
Abstract
The invention relates to a shutoff type vibration well cementation device, which relates to the technical field of oil and gas well engineering and comprises a vibration unit, a detection unit and a central control unit. The invention controls the flow direction and the impact direction of cement slurry by arranging the guide seat with the inclined through hole in the vibration unit, provides radial rotary vibration by arranging the eccentric impeller, eliminates bubbles in the cement slurry through vibration, shortens the solidification time of the cement slurry, simultaneously provides rotary pulse vibration by arranging the turning plate wheel, ensures the vibration unit to realize composite uniform vibration, ensures the stability of the vibration period of the vibration unit, adjusts the friction coefficient of the first friction bearing and the second friction bearing according to the real-time vibration frequency by arranging the central control unit, and adjusts the injection pressure of external cement slurry injection equipment according to the real-time vibration frequency, realizes accurate and complex control of vibration waves in vibration well cementation, and improves the well cementation quality.
Description
Technical Field
The invention relates to the technical field of oil and gas well engineering, in particular to a shutoff type vibration well cementation device.
Background
The well cementation is a construction operation of putting a casing into an oil and gas well and injecting cement into an annular space between the well and the casing, at least two times of well cementation and up to four to five times of well cementation are generally carried out in the well drilling operation, cracks and gaps are often generated in the cement solidification process due to the density problem of the cement and the existence of impurities such as bubbles, the problems of poor well cementation quality and even unqualified well cementation are easily caused, fluid at the bottom layer can permeate into a cement matrix at the later stage, channeling between the bottom layers occurs, and the oil and gas yield is influenced, so the improvement of the well cementation quality by vibrating cement slurry in the well cementation process is one of effective technical means.
In the vibration well cementation device used at present, drilling fluid is used for providing power, an annular eccentric block is matched on a turbine rotor to achieve the purpose of vibration, although the structure is reliable and simple, the achievable vibration function is still limited, the vibration waves cannot be accurately controlled in a complex mode, and the current vibration well cementation device has great limitation along with the improvement of the well cementation accuracy requirement.
Disclosure of Invention
Therefore, the invention provides a shutoff type vibration well cementation device which is used for solving the problem that vibration waves of the vibration well cementation device in the prior art cannot be accurately controlled in a complex mode.
In order to achieve the above object, the present invention provides a shutoff type vibration cementing device, comprising,
the vibration unit comprises an outer sleeve, and a fluid bin is arranged at the input end of the outer sleeve and used for bearing circulating cement slurry; a guide seat is fixed in the outer sleeve, and a plurality of inclined through holes are formed in the guide seat and used for adjusting the flow direction of cement paste in the vibration unit; one side of the guide seat is connected with a heavy impeller, and the heavy impeller generates radial rotary vibration through oblique impact of cement slurry in the guide seat; the other side of the unbalanced impeller is fixed on one side of the turning plate body through a first friction bearing, and the first friction bearing is used for adjusting the friction coefficient of the rotation of the unbalanced impeller; a diversion trench is arranged in the turning plate body, and a through hole which is in three-way to one-way is formed in the diversion trench; the turning plate body is fixedly provided with a turning plate wheel through a second friction bearing, the turning plate wheel generates pulse vibration through impact rotation of cement paste on one side of the one-way through hole in the diversion trench, and the second friction bearing is used for adjusting the rotating friction coefficient of the turning plate wheel; the output end of the outer sleeve is provided with a guide cone for guiding cement slurry to the outside of the vibration unit;
the detection unit comprises a vibration detector used for detecting the vibration frequency of the intercepting type vibration well cementation device; a first pressure detector disposed inside the fluid chamber to detect a real-time pressure inside the fluid chamber; the second pressure detector is arranged inside the guide cone and used for detecting the real-time pressure inside the guide cone;
a central control unit connected to the first friction bearing, the second friction bearing, the vibration detector, the first pressure detector, the second pressure detector, and an external cement slurry injection device, respectively, the central control unit judges the real-time vibration frequency of the vibration unit through a set frequency range arranged in the central control unit, and adjusts the initial friction coefficient of the first friction bearing according to the determination result, the central control unit can determine the friction coefficient of the first friction bearing through the adjusting zone arranged in the central control unit, and adjusts the friction coefficient of the second friction bearing for supplement according to the judgment result, the central control unit adjusts the interval according to the friction coefficient of the second friction bearing, and controlling the real-time vibration frequency of the vibration unit by adjusting the injection pressure of the cement paste injection equipment, and adjusting the real-time vibration frequency of the vibration unit to be within a set frequency range.
Furthermore, a set frequency Fd and a set frequency difference delta Fd are arranged in the central control unit, the vibration detector detects the real-time vibration frequency Fs of the vibration unit and transmits the result to the central control unit, the central control unit calculates the real-time vibration frequency difference delta Fs according to the real-time vibration frequency Fs and the set frequency Fd, the central control unit compares the real-time vibration frequency difference delta Fs with the set frequency difference delta Fd,
when the delta Fs is less than or equal to the delta Fd, the central control unit judges that the real-time vibration frequency of the vibration unit is within a set range, and does not adjust the vibration state of the vibration unit;
when the delta Fs is larger than the delta Fd, the central control unit judges that the real-time vibration frequency of the vibration unit is not in the set range, and the central control unit compares the set frequency with the real-time vibration frequency to judge the vibration state of the vibration unit.
Furthermore, the central control unit is internally provided with an initial friction coefficient Hac of the first friction bearing, when the central control unit judges that the real-time vibration frequency of the vibration unit is not in a set range, the central control unit compares the real-time vibration frequency Fs with a set frequency Fd,
when Fs is larger than Fd, the central control unit judges that the real-time vibration frequency of the vibration unit exceeds a set range, and the central control unit adjusts the initial friction coefficient of the first friction bearing to Hac', Hac ═ Hac + Hac x [ (Fs-Fd)/Fs ];
and when Fs is less than Fd, the central control unit judges that the real-time vibration frequency of the vibration unit is lower than a set range, and the central control unit adjusts the initial friction coefficient of the first friction bearing to Hac', Hac-Hac x [ (Fd-Fs)/Fd ].
Further, the central control unit is internally provided with a maximum friction coefficient Hax and a minimum friction coefficient Han of the first friction bearing, when the central control unit adjusts the initial friction coefficient of the first friction bearing to Hac ', the central control unit compares the initial friction coefficient Hac' with the maximum friction coefficient Hax and the minimum friction coefficient Han,
when Hac' is greater than Hax, the central control unit judges that the adjusted friction coefficient exceeds the maximum friction coefficient, and the central control unit adjusts the initial friction coefficient of the second friction bearing to control the real-time vibration frequency of the vibration unit;
when Han 'is less than or equal to Hac' and less than or equal to Hax, the central control unit judges that the adjusted friction coefficient is in an adjustable range, and the vibration detector detects the real-time vibration frequency of the adjusted vibration unit so as to judge whether the real-time vibration frequency of the vibration unit is in a set range;
when Hac' < Han, the central control unit judges that the adjusted friction coefficient is lower than the minimum friction coefficient, and the central control unit adjusts the initial friction coefficient of the second friction bearing to control the real-time vibration frequency of the vibration unit.
Further, when the central control unit determines that the adjusted friction coefficient is within the adjustable range, the vibration detector detects the real-time vibration frequency Fs 'adjusted by the vibration unit, the central control unit calculates the adjusted real-time vibration frequency difference Δ Fs' according to the adjusted real-time vibration frequency Fs 'and the set frequency Fd, the central control unit compares the adjusted real-time vibration frequency difference Δ Fs' with the set frequency difference Δ Fd,
when the delta Fs' is less than or equal to the delta Fd, the central control unit judges that the adjusted real-time vibration frequency is within a set range, and adjustment is completed;
when the delta Fs 'is larger than the delta Fd, the central control unit judges that the adjusted real-time vibration frequency is not in the set range, the central control unit repeats the operation of comparing the set frequency with the real-time vibration frequency and adjusting and judging the initial friction coefficient of the first friction bearing until the delta Fs' is smaller than or equal to the delta Fd, and the adjustment is completed.
Further, an initial friction coefficient Hbc of the second friction bearing is arranged in the central control unit, and when the central control unit judges that the adjusted friction coefficient exceeds the maximum friction coefficient or is lower than the minimum friction coefficient, the central control unit adjusts the initial friction coefficient Hbc of the second friction bearing,
when Hac '> Hax, the central control unit adjusts the initial friction coefficient of the first friction bearing to Hac', Hac ═ Hax, the central control unit adjusts the initial friction coefficient of the second friction bearing to Hbc ', Hbc ═ Hbc × (Hac'/Hax), the central control unit repeats the operations of judging the adjusted real-time vibration frequency and adjusting the initial friction coefficient of the first friction bearing, and adjusts the initial friction coefficient of the second friction bearing until the real-time vibration frequency of the vibration unit is detected to reach a set range, and the adjustment is completed;
when Hac '< Han, the central control unit adjusts the initial friction coefficient of the first friction bearing to Hac ″, Hac ═ Han, the central control unit adjusts the initial friction coefficient of the second friction bearing to Hbc ″, Hbc ═ Hbc × (Hac'/Han), the central control unit repeats the operations of judging according to the adjusted real-time vibration frequency and adjusting the initial friction coefficient of the first friction bearing, adjusts the initial friction coefficient of the second friction bearing until the real-time vibration frequency of the vibration unit is detected to reach a set range, and adjustment is completed.
Further, the central control unit is provided with a maximum friction coefficient Hbx and a minimum friction coefficient Hbn of the second friction bearing, when the central control unit adjusts the initial friction coefficient of the second friction bearing to Hbc ', the central control unit compares the initial friction coefficient Hbc' with the maximum friction coefficient Hbx and the minimum friction coefficient Hbn,
when Hbc' > Hbx, the central control unit judges that the initial friction coefficient of the first friction bearing reaches the maximum value and the adjusted initial friction coefficient of the second friction bearing exceeds the maximum friction coefficient, and the central control unit adjusts the injection pressure of the cement paste injection equipment to adjust the real-time vibration frequency of the vibration unit;
when Hbn Hbc' ≦ Hbx, the central control unit judges that the adjusted initial friction coefficient of the second friction bearing is in an adjustable range, and the central control unit does not adjust the injection pressure of the cement paste injection equipment;
when Hbc' < Hbn, the central control unit judges that the initial friction coefficient of the first friction bearing is lower than the minimum value and the adjusted initial friction coefficient of the second friction bearing is lower than the minimum friction coefficient, and the central control unit adjusts the injection pressure of the cement paste injection device so as to adjust the real-time vibration frequency of the vibration unit.
Further, the central control unit acquires the injection pressure Pv of the cement paste injection device, when the central control unit determines that Hbc ' < Hbn, the central control unit adjusts the friction coefficient of the second friction bearing to Hbc ″, where Hbc ″ > Hbn, the vibration detector detects the real-time vibration frequency Fs of the vibration unit, the central control unit adjusts the injection pressure of the cement paste injection device to Pv ', Pv ' ═ Pv + Pv × [ (Fd-Fs ")/Fd ], and repeats the real-time vibration frequency determination operation on the vibration unit according to the set frequency range, adjusts the injection pressure of the cement paste injection device, and completes the adjustment until the real-time vibration frequency adjusted by the vibration unit reaches the set frequency range.
Further, a first standard pressure difference Pb1 and a second standard pressure difference Pb2 are arranged in the central control unit, Pb1 is less than Pb2, when the central control unit determines that Hbc' > Hbx, the first pressure detector detects real-time pressure Pr in the fluid bin, the second pressure detector detects real-time pressure Pc in the guide cone, the central control unit calculates real-time pressure difference Ps in the vibration unit according to the real-time pressure Pr in the fluid bin and the real-time pressure Pc in the guide cone, Ps is | Pr-Pc |, and compares the real-time pressure difference Ps with the first standard pressure difference Pb1 and the second standard pressure difference Pb2,
when Ps is less than Pb1, the central control unit judges that the real-time pressure difference in the vibration unit is lower than a first standard pressure difference, adjusts the friction coefficient of the second friction bearing to Hbc ″, which is Hbx, and adjusts the injection pressure of the cement paste injection equipment according to the detected real-time vibration frequency of the vibration unit;
when Pb1 is not less than Ps and not more than Pb2, the central control unit judges that the real-time pressure in the vibration unit is between a first standard pressure difference and a second standard pressure difference, adjusts the friction coefficient of the second friction bearing to Hbc, and the Hbc is equal to Hbc, and adjusts the injection pressure of the cement paste injection equipment according to the detected real-time vibration frequency of the vibration unit;
when Ps is larger than Pb2, the central control unit judges that the real-time pressure difference in the vibration unit is higher than a second standard pressure difference, the central control unit adjusts the friction coefficient of the first friction bearing to Hac1, Hac1 ═ Hac, the central control unit adjusts the friction coefficient of the second friction bearing to Hbc ″, Hbc, and adjusts the injection pressure of the cement paste injection device according to the detected real-time vibration frequency of the vibration unit.
Further, the central control unit obtains an injection pressure Pv of the cement paste injection device, adjusts the friction coefficient of the first friction bearing and the second friction bearing according to a comparison result of the real-time pressure difference with the first standard pressure difference and the second standard pressure difference, after the central control unit completes the adjustment of the friction coefficient, the vibration detector detects the real-time vibration frequency Fs ″ of the vibration unit, the central control unit adjusts the injection pressure of the cement paste injection device to Pv ', Pv ' ═ Pv-Pv × [ (Fs "-Fd)/Fs ' ], the central control unit repeats the above-mentioned operation of determining the real-time vibration frequency of the vibration unit according to the set frequency range, adjusts the injection pressure of the cement paste injection device until the real-time vibration frequency adjusted by the vibration unit reaches the set frequency range, the adjustment is completed.
Compared with the prior art, the vibration unit has the advantages that the guide seat with the inclined through hole is arranged in the vibration unit, the flow direction and the impact direction of cement paste are controlled, radial rotating vibration is provided by the eccentric impeller, air bubbles in the cement paste are eliminated through vibration, the setting time of the cement paste is shortened, meanwhile, the turning plate wheel is arranged to provide rotating pulse vibration, the vibration unit realizes composite uniform vibration, the stability of the vibration period of the vibration unit is ensured, the friction coefficient of the first friction bearing and the second friction bearing is adjusted through the central control unit according to real-time vibration frequency, the injection pressure of external cement paste injection equipment is adjusted according to the real-time vibration frequency, accurate complex control on vibration waves in vibration well cementation is realized, and the well cementation quality is improved.
Furthermore, the real-time vibration frequency of the vibration unit is judged by setting the set frequency and the set frequency difference in the central control unit, so that the real-time vibration frequency of the vibration unit can be judged to be in a standard state in a set range, unnecessary adjustment processes are reduced, the judgment efficiency is improved, meanwhile, the vibration frequency adjustment effect of the intercepting type vibration well cementation device can be guaranteed for the real-time vibration frequency of the vibration unit, and the control precision of the real-time vibration frequency is improved.
Further, when the central control unit judges that the real-time vibration frequency of the vibration unit is not in the set range, the central control unit compares the real-time vibration frequency with the set frequency, when the real-time vibration frequency is higher than the set frequency, the friction coefficient of the first friction bearing is increased to reduce the rotation of the eccentric weight impeller, so that the effect of reducing the vibration frequency is achieved, and when the real-time vibration frequency is lower than the set frequency, the friction coefficient of the first friction bearing is reduced to increase the rotation of the eccentric weight impeller, so that the effect of increasing the vibration frequency is achieved, the control of the vibration frequency of the intercepting type vibration well cementation device is achieved, and the well cementation quality is improved.
Particularly, when the friction coefficient of the first friction bearing is adjusted, an adjustable interval of the friction coefficient of the first friction bearing is set, the adjustment value of the friction coefficient of the first friction bearing is compared with the maximum friction coefficient and the minimum friction coefficient, whether the friction coefficient can be achieved or not is judged, when the friction coefficient of the first friction bearing is in the adjustable interval, the vibration frequency is controlled through independent adjustment of the friction coefficient, the adjustment efficiency is improved, when the friction coefficient is not in the adjustable interval, the friction coefficient of the second friction bearing is adjusted to supplement, the vibration frequency is adjusted, and the accurate control of the vibration frequency of the well cementing device is further achieved.
Furthermore, when the adjusted friction coefficient is judged to be within the adjustable range, the real-time vibration frequency is obtained through the vibration detector, the real-time vibration frequency is judged, the friction coefficient of the first friction bearing is repeatedly adjusted, the real-time vibration frequency of the vibration unit reaches the set range, the strength of cement paste is improved through accurately controlling the real-time vibration frequency, the replacement efficiency of the cement paste is improved, the well cementation process is accelerated, and the safety of well cementation is improved.
Particularly, when the central control unit judges that the adjusted friction coefficient exceeds the maximum friction coefficient or is lower than the minimum friction coefficient, the central control unit adjusts the friction coefficient of the second friction bearing to control the rotation speed of the flap wheel and reduce the vibration frequency of the flap wheel.
Furthermore, when the friction coefficient of the second friction bearing is adjusted, an adjustable interval of the second friction bearing is also set, when the adjustment value of the friction coefficient meets the adjustable interval, the friction coefficient of the second friction bearing is repeatedly adjusted, the real-time vibration frequency of the vibration unit reaches a set range, and when the adjustment value of the friction coefficient exceeds the adjustable interval, the central control unit adjusts the injection pressure of cement slurry injection equipment, so that the impact of the cement slurry on the unbalanced impeller and the turnover plate wheel is changed, the vibration frequency is controlled, and the well cementation quality is improved.
Particularly, when the central control unit judges that the friction coefficient of the first friction bearing is lower than the minimum value and the adjusted friction coefficient of the second friction bearing is also lower than the minimum friction coefficient, the vibration frequency is still lower than the set frequency when the friction coefficients of the two bearings are lower, the friction coefficients of the two bearings are reduced to the minimum value at the moment so as to reduce the capacity loss when the imbalance impeller and the turnover plate wheel rotate, meanwhile, the impact force of the imbalance impeller and the turnover plate wheel is increased by improving the injection pressure of cement paste injection equipment, the rotating speed of the imbalance impeller and the turnover plate wheel is improved, the real-time vibration frequency is controlled, and the well cementation quality is improved.
Particularly, when the central control unit judges that the friction coefficient of the first friction bearing reaches the maximum value and the friction coefficient adjusted by the second friction bearing exceeds the maximum friction coefficient, the energy consumed by the two friction bearings is large, the pressure consumption between the heavy impeller and the flap wheel is determined by calculating and comparing the pressure difference between the real-time pressure in the fluid bin and the real-time pressure in the guide cone, when the pressure difference is low, the pressure consumption between the heavy impeller and the flap wheel is low, the adjusted friction coefficients of the two friction bearings are kept, the injection pressure adjustment of the cement paste injection equipment is used for compensating the differential vibration frequency, when the pressure difference is large, the pressure consumption between the heavy impeller and the flap wheel is high due to the influences of cement paste fluidity, viscosity, temperature and components in the vibration unit, and the friction coefficients of the two friction bearings are not adjusted, and the injection pressure of the cement paste injection equipment is adjusted for compensation, so that the circulation efficiency of the cement paste is ensured, and the well cementation efficiency is improved on the premise of ensuring the quality.
Furthermore, when the friction coefficient of the second friction bearing cannot meet the set frequency within the adjustable range, the friction coefficient of the friction bearing is adjusted to be in a corresponding state, the detection of the real-time vibration frequency is completed once, the detection result of the vibration frequency is combined with the set frequency, the injection pressure of the cement paste injection equipment is adjusted, the real-time vibration frequency of the vibration unit is enabled to reach the set frequency range through repeated judgment and adjustment, the precise complex control of vibration waves in the vibration well cementation is realized, and the well cementation quality is improved.
Drawings
Fig. 1 is a schematic plan structure diagram of the shutoff type vibration cementing device according to the embodiment.
Fig. 2 is a schematic three-dimensional structure diagram of a vibration unit of the intercepting type vibration cementing device according to the embodiment.
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 do not delimit 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.
Please refer to fig. 1, which is a schematic plane structure diagram of the intercepting type vibration cementing device of the present embodiment, including an outer sleeve 1, a guide seat 2, a bias impeller 3, a flap body 4, a diversion trench 5, a flap wheel 6, a guide cone 7, a first friction bearing 8, a second friction bearing 9, a vibration detector 10, a first pressure detector 11, a second pressure detector 12, a fluid chamber 13, and a central control unit (not shown in the figure);
please refer to fig. 2, which is a schematic three-dimensional structural diagram of a vibration unit of the intercepting type vibration cementing device of the present embodiment, wherein,
the vibration unit comprises an outer sleeve 1, wherein a fluid bin 13 is arranged at the input end of the outer sleeve 1 and used for bearing circulating cement slurry; a guide seat 2 is fixed inside the outer sleeve 1, and six inclined through holes are formed inside the guide seat 2 and used for adjusting the flow direction of cement paste inside the vibration unit; one side of the guide seat 2 is connected with a heavy impeller 3, and the heavy impeller 3 generates radial rotary vibration through oblique impact of cement slurry in the guide seat 2; the other side of the unbalanced weight impeller 3 is fixed on one side of the turning plate body 4 through a first friction bearing 8, and the first friction bearing 8 is used for adjusting the friction coefficient of the rotation of the unbalanced weight impeller 3; a diversion trench 5 is arranged in the turning plate body 4, and a through hole which is three-way and unidirectional is arranged in the diversion trench 5; the turning plate body 4 is fixedly provided with a turning plate wheel 6 through a second friction bearing 9, the turning plate wheel 6 generates pulse vibration through impact rotation of cement slurry on one side of a one-way through hole in the diversion trench 5, and the second friction bearing 9 is used for adjusting the friction coefficient of the turning plate wheel 6 in rotation; the output end of the outer sleeve 1 is provided with a guide cone 7 for guiding cement slurry to the outside of the vibration unit;
a detection unit comprising a vibration detector 10 for detecting a vibration frequency of the intercepting type vibration cementing device; a first pressure detector 11 disposed inside the fluid chamber 13 for detecting a real-time pressure inside the fluid chamber 13; a second pressure detector 12, which is arranged inside the guide cone 7 and is used for detecting the real-time pressure inside the guide cone 7;
a central control unit, which is connected to the first friction bearing 8, the second friction bearing 9, the vibration detector 10, the first pressure detector 11, the second pressure detector 12 and the external cement slurry injection device, respectively, the central control unit determines the real-time vibration frequency of the vibration unit through an internally set frequency range, and adjusts the initial friction coefficient of the first friction bearing 8 according to the determination result, the central control unit can determine the friction coefficient of the first friction bearing 8 through an internally set adjustment interval, and adjusts the friction coefficient of the second friction bearing 9 according to the determination result for supplementation, and controls the real-time vibration frequency of the vibration unit by adjusting the injection pressure of the cement slurry injection device according to the friction coefficient adjustment interval of the second friction bearing 9, and adjusting the real-time vibration frequency of the vibration unit to be within a set frequency range.
Through set up the guide holder 2 that has the slant through-hole in the vibration unit, flow direction and the impact direction to the grout are controlled, provide radial rotational vibration through setting up the unbalance weight impeller 3, bubble in the grout is eliminated through the vibration, shorten the setting time of grout, provide rotatory pulse vibration through setting up the flap wheel 6 again simultaneously, make the vibration unit realize compound even vibration, the stability of the vibration cycle of vibration unit has been ensured, adjust the coefficient of friction of first friction bearing 8 and second friction bearing 9 according to real-time vibration frequency through setting up the well control unit, and adjust the injection pressure of outside grout injection apparatus according to real-time vibration frequency, realized carrying out accurate complicated control to the vibration wave in the vibration well cementation, improve the well cementation quality.
Specifically, a set frequency Fd and a set frequency difference Δ Fd are arranged in the central control unit, the vibration detector 10 detects a real-time vibration frequency Fs of the vibration unit and transmits the result to the central control unit, the central control unit calculates a real-time vibration frequency difference Δ Fs according to the real-time vibration frequency Fs and the set frequency Fd, the central control unit compares the real-time vibration frequency difference Δ Fs with the set frequency difference Δ Fd,
when the delta Fs is less than or equal to the delta Fd, the central control unit judges that the real-time vibration frequency of the vibration unit is within a set range, and the vibration state of the vibration unit is not adjusted;
when the delta Fs is larger than the delta Fd, the central control unit judges that the real-time vibration frequency of the vibration unit is not in the set range, and the central control unit compares the set frequency with the real-time vibration frequency to judge the vibration state of the vibration unit.
The real-time vibration frequency of the vibration unit is judged by setting the set frequency and the set frequency difference in the central control unit, so that the real-time vibration frequency of the vibration unit can be judged to be in a standard state in a set range, unnecessary adjustment processes are reduced, the judgment efficiency is improved, meanwhile, the vibration frequency adjustment effect of the intercepting type vibration well cementation device can be guaranteed for the real-time vibration frequency of the vibration unit, and the control precision of the real-time vibration frequency is improved.
Specifically, the central control unit is internally provided with an initial friction coefficient Hac of the first friction bearing 8, when the central control unit judges that the real-time vibration frequency of the vibration unit is not in a set range, the central control unit compares the real-time vibration frequency Fs with a set frequency Fd,
when Fs is larger than Fd, the central control unit judges that the real-time vibration frequency of the vibration unit exceeds a set range, and the central control unit adjusts the initial friction coefficient of the first friction bearing 8 to Hac', Hac ═ Hac + Hac x [ (Fs-Fd)/Fs ];
when Fs is smaller than Fd, the central control unit judges that the real-time vibration frequency of the vibration unit is lower than a set range, and the central control unit adjusts the initial friction coefficient of the first friction bearing 8 to Hac', Hac-Hac x [ (Fd-Fs)/Fd ].
When the central control unit judges that the real-time vibration frequency of the vibration unit is not in the set range, the central control unit compares the real-time vibration frequency with the set frequency, when the real-time vibration frequency is higher than the set frequency, the friction coefficient of the first friction bearing 8 is increased to reduce the rotation of the eccentric weight impeller 3, so that the effect of reducing the vibration frequency is achieved, and when the real-time vibration frequency is lower than the set frequency, the friction coefficient of the first friction bearing 8 is reduced to increase the rotation of the eccentric weight impeller 3, so that the effect of increasing the vibration frequency is achieved, the control of the vibration frequency of the intercepting type well cementation vibration device is achieved, and the well cementation quality is improved.
Specifically, the central control unit is internally provided with a maximum friction coefficient Hax and a minimum friction coefficient Han of the first friction bearing 8, when the central control unit adjusts the initial friction coefficient of the first friction bearing 8 to Hac ', the central control unit compares the initial friction coefficient Hac' with the maximum friction coefficient Hax and the minimum friction coefficient Han,
when Hac' is greater than Hax, the central control unit judges that the adjusted friction coefficient exceeds the maximum friction coefficient, and the central control unit adjusts the initial friction coefficient of the second friction bearing 9 to control the real-time vibration frequency of the vibration unit;
when Han 'is less than or equal to Hac' and less than or equal to Hax, the central control unit judges that the adjusted friction coefficient is in an adjustable range, and the vibration detector 10 detects the real-time vibration frequency of the adjusted vibration unit so as to judge whether the real-time vibration frequency of the vibration unit is in a set range;
when Hac' < Han, the central control unit judges that the adjusted friction coefficient is lower than the minimum friction coefficient, and the central control unit adjusts the initial friction coefficient of the second friction bearing 9 to control the real-time vibration frequency of the vibration unit.
When the friction coefficient of the first friction bearing 8 is adjusted, an adjustable interval of the friction coefficient of the first friction bearing 8 is set, the adjustment value of the friction coefficient of the first friction bearing 8 is compared through setting the maximum friction coefficient and the minimum friction coefficient, whether the friction coefficient can be realized is judged, when the friction coefficient of the first friction bearing 8 is in the adjustable interval, the vibration frequency is controlled through independent adjustment of the friction coefficient, the adjustment efficiency is improved, when the friction coefficient is not in the adjustable interval, the friction coefficient of the second friction bearing 9 is adjusted to supplement, the vibration frequency is adjusted, and accurate control of the vibration frequency of the well cementation device is further achieved.
Specifically, when the central control unit determines that the adjusted friction coefficient is within the adjustable range, the vibration detector 10 detects the real-time vibration frequency Fs 'adjusted by the vibration unit, the central control unit calculates the adjusted real-time vibration frequency difference Δ Fs' according to the adjusted real-time vibration frequency Fs 'and the set frequency Fd, the central control unit compares the adjusted real-time vibration frequency difference Δ Fs' with the set frequency difference Δ Fd,
when the delta Fs' is less than or equal to the delta Fd, the central control unit judges that the adjusted real-time vibration frequency is within a set range, and adjustment is completed;
when the delta Fs 'is larger than the delta Fd, the central control unit judges that the adjusted real-time vibration frequency is not in the set range, and the central control unit repeats the operation of comparing the set frequency with the real-time vibration frequency and adjusting and judging the initial friction coefficient of the first friction bearing 8 until the delta Fs' is smaller than or equal to the delta Fd, and the adjustment is completed.
When the adjusted friction coefficient is judged to be in the adjustable range, the vibration detector 10 is used for acquiring real-time vibration frequency and judging the real-time vibration frequency, the friction coefficient of the first friction bearing 8 is repeatedly adjusted, so that the real-time vibration frequency of the vibration unit reaches the set range, the strength of cement slurry is improved by accurately controlling the real-time vibration frequency, the replacement efficiency of the cement slurry is improved, the well cementation process is accelerated, and the safety of well cementation is improved.
Specifically, the central control unit is provided with an initial friction coefficient Hbc of the second friction bearing 9, and when the central control unit determines that the adjusted friction coefficient exceeds the maximum friction coefficient or is lower than the minimum friction coefficient, the central control unit adjusts the initial friction coefficient Hbc of the second friction bearing 9,
when Hac '> Hax, the central control unit adjusts the initial friction coefficient of the first friction bearing 8 to Hac', Hac ═ Hax, adjusts the initial friction coefficient of the second friction bearing 9 to Hbc ', Hbc ═ Hbc × (Hac'/Hax), repeats the above operations of determining the adjusted real-time vibration frequency and adjusting the initial friction coefficient of the first friction bearing 8, and adjusts the initial friction coefficient of the second friction bearing 9 until the real-time vibration frequency of the vibration unit is detected to reach a set range, thereby completing the adjustment;
when Hac '< Han, the central control unit adjusts the initial friction coefficient of the first friction bearing 8 to Hac', Hac ═ Han, the central control unit adjusts the initial friction coefficient of the second friction bearing 9 to Hbc ', Hbc ═ Hbc × (Hac'/Han), and the central control unit repeats the above-mentioned operations of determining according to the adjusted real-time vibration frequency and adjusting the initial friction coefficient of the first friction bearing 8, and adjusts the initial friction coefficient of the second friction bearing 9 until the real-time vibration frequency of the vibration unit is detected to be within the set range, thereby completing the adjustment.
When the central control unit judges that the adjusted friction coefficient exceeds the maximum friction coefficient or is lower than the minimum friction coefficient, the central control unit adjusts the friction coefficient of the second friction bearing 9 to control the rotation speed of the flap wheel 6 and reduce the vibration frequency of the flap wheel 6, and when the imbalance impeller 3 and the flap wheel 6 vibrate simultaneously, compound vibration is formed, and the frequency of the compound vibration is a multiple relation of the vibration of the imbalance impeller 3 and the flap wheel 6, so that the friction coefficient of the second friction bearing 9 is adjusted by adopting the multiple relation, and the real-time vibration frequency is controlled more accurately.
Specifically, the central control unit is provided with a maximum friction coefficient Hbx and a minimum friction coefficient Hbn of the second friction bearing 9, and when the central control unit adjusts the initial friction coefficient of the second friction bearing 9 to Hbc ', the central control unit compares the initial friction coefficient Hbc' with the maximum friction coefficient Hbx and the minimum friction coefficient Hbn,
when Hbc' > Hbx, the central control unit judges that the initial friction coefficient of the first friction bearing 8 reaches the maximum value and the adjusted initial friction coefficient of the second friction bearing 9 exceeds the maximum friction coefficient, and the central control unit adjusts the injection pressure of the cement paste injection equipment to adjust the real-time vibration frequency of the vibration unit;
when Hbn Hbc' ≦ Hbx, the central control unit judges that the adjusted initial friction coefficient of the second friction bearing 9 is in the adjustable range, and the central control unit does not adjust the injection pressure of the cement paste injection equipment;
when Hbc' < Hbn, the central control unit judges that the initial friction coefficient of the first friction bearing 8 is lower than the minimum value and the adjusted initial friction coefficient of the second friction bearing 9 is lower than the minimum friction coefficient, and the central control unit adjusts the injection pressure of the cement paste injection device so as to adjust the real-time vibration frequency of the vibration unit.
When the friction coefficient of the second friction bearing 9 is adjusted, an adjustable interval of the second friction bearing 9 is also set, when the adjustment value of the friction coefficient meets the adjustable interval, the friction coefficient of the second friction bearing 9 is repeatedly adjusted, the real-time vibration frequency of the vibration unit reaches a set range, when the adjustment value of the friction coefficient exceeds the adjustable interval, the central control unit adjusts the injection pressure of cement slurry injection equipment, the impact of the cement slurry on the unbalanced impeller 3 and the plate turnover wheel 6 is changed, the vibration frequency is controlled, and the well cementation quality is improved.
Specifically, the central control unit obtains the injection pressure Pv of the cement paste injection device, when the central control unit determines that Hbc ' < Hbn, the central control unit adjusts the friction coefficient of the second friction bearing 9 to Hbc ″, where Hbc ″ < Hbn, the vibration detector 10 detects the real-time vibration frequency Fs ″ of the vibration unit, the central control unit adjusts the injection pressure of the cement paste injection device to Pv ', Pv ' ═ Pv + Pv × [ (Fd-Fs ")/Fd ], and repeats the real-time vibration frequency determination operation on the vibration unit according to the set frequency range, adjusts the injection pressure of the cement paste injection device, and completes the adjustment until the real-time vibration frequency adjusted by the vibration unit reaches the set frequency range.
When the central control unit judges that the friction coefficient of the first friction bearing 8 is lower than the minimum value and the adjusted friction coefficient of the second friction bearing 9 is also lower than the minimum friction coefficient, the vibration frequency is still lower than the set frequency when the friction coefficients of the two bearings are lower, the friction coefficients of the two bearings are reduced to the minimum value at the moment so as to reduce the capacity loss when the overweight impeller 3 and the turning plate wheel 6 rotate, meanwhile, the impact force of the overweight impeller 3 and the turning plate wheel 6 is increased by improving the injection pressure of cement paste injection equipment, the rotating speed of the overweight impeller 3 and the turning plate wheel 6 is improved, the real-time vibration frequency is controlled, and the well cementation quality is improved.
Specifically, a first standard pressure difference Pb1 and a second standard pressure difference Pb2 are provided in the central control unit, wherein Pb1 is less than Pb2, when the central control unit determines Hbc' > Hbx, the first pressure detector 11 detects the real-time pressure Pr inside the fluid bin 13, the second pressure detector 12 detects the real-time pressure Pc inside the guide cone 7, the central control unit calculates the real-time pressure difference Ps, Ps | Pr-Pc | in the vibration unit according to the real-time pressure Pr inside the fluid bin 13 and the real-time pressure Pc inside the guide cone 7, and compares the real-time pressure difference Ps with the first standard pressure difference Pb1 and the second standard pressure difference Pb2,
when Ps is less than Pb1, the central control unit judges that the real-time pressure difference in the vibration unit is lower than a first standard pressure difference, the central control unit adjusts the friction coefficient of the second friction bearing 9 to Hbc ', and the Hbc' is Hbx, and adjusts the injection pressure of the cement paste injection equipment according to the detected real-time vibration frequency of the vibration unit;
when Pb1 is not less than Ps and not more than Pb2, the central control unit judges that the real-time pressure in the vibration unit is between a first standard pressure difference and a second standard pressure difference, adjusts the friction coefficient of the second friction bearing 9 to Hbc, and the Hbc is Hbc, and adjusts the injection pressure of the cement paste injection equipment according to the detected real-time vibration frequency of the vibration unit;
when Ps > Pb2, the central control unit determines that the real-time pressure difference in the vibration unit is higher than a second standard pressure difference, adjusts the friction coefficient of the first friction bearing 8 to Hac1, Hac1 ═ Hac, adjusts the friction coefficient of the second friction bearing 9 to Hbc ″, and adjusts the injection pressure of the cement paste injection device according to the detected real-time vibration frequency of the vibration unit.
When the central control unit judges that the friction coefficient of the first friction bearing 8 reaches the maximum value and the adjusted friction coefficient of the second friction bearing 9 exceeds the maximum friction coefficient, the energy consumed by the two friction bearings is larger, the pressure consumption between the heavy impeller 3 and the turning plate wheel 6 is determined by calculating and comparing the pressure difference between the real-time pressure in the fluid bin 13 and the real-time pressure in the guide cone 7, when the pressure difference is lower, the pressure consumption between the heavy impeller 3 and the turning plate wheel 6 is lower, the adjusted friction coefficient of the two friction bearings is kept, the injection pressure adjustment of cement paste injection equipment is used for compensating the different vibration frequency, when the pressure difference is larger, the pressure consumption between the heavy impeller 3 and the turning plate wheel 6 is higher due to the influences of cement paste fluidity, viscosity, temperature and internal parts of the vibration unit, the friction coefficients of the two friction bearings are not adjusted, and the injection pressure of the cement paste injection equipment is adjusted to compensate, so that the circulation efficiency of the cement paste is guaranteed, and the well cementation efficiency is improved on the premise of ensuring the quality.
Specifically, the central control unit obtains an injection pressure Pv of the cement paste injection device, adjusts the friction coefficient of the first friction bearing 8 and the second friction bearing 9 according to a comparison result between a real-time pressure difference and a first standard pressure difference and a second standard pressure difference, after the central control unit completes the adjustment of the friction coefficient, the vibration detector 10 detects a real-time vibration frequency Fs of the vibration unit, the central control unit adjusts the injection pressure of the cement paste injection device to Pv ', Pv ' ═ Pv-Pv × [ (Fs "-Fd)/Fs ' ], and repeats the real-time vibration frequency determination operation of the vibration unit according to a set frequency range, adjusts the injection pressure of the cement paste injection device until the real-time vibration frequency adjusted by the vibration unit reaches the set frequency range, the adjustment is completed.
When the friction coefficient of the second friction bearing 9 can not meet the set frequency within the adjustable range, the friction coefficient of the friction bearing is adjusted to be in a corresponding state, the detection of the real-time vibration frequency is completed once, the detection result of the vibration frequency is combined with the set frequency, the injection pressure of the cement paste injection equipment is adjusted, the real-time vibration frequency of the vibration unit is enabled to reach the set frequency range through repeated judgment and adjustment, the accurate complex control of vibration waves in the vibration well cementation is realized, and the well cementation quality is improved.
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 be within 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 (10)
1. A shutoff type vibration well cementation device is characterized by comprising,
the vibration unit comprises an outer sleeve, and a fluid bin is arranged at the input end of the outer sleeve and used for bearing circulating cement slurry; a guide seat is fixed in the outer sleeve, and a plurality of inclined through holes are formed in the guide seat and used for adjusting the flow direction of cement paste in the vibration unit; one side of the guide seat is connected with a heavy impeller, and the heavy impeller generates radial rotary vibration through oblique impact of cement slurry in the guide seat; the other side of the unbalanced impeller is fixed on one side of the turning plate body through a first friction bearing, and the first friction bearing is used for adjusting the friction coefficient of the rotation of the unbalanced impeller; a diversion trench is arranged in the turning plate body, and a through hole which is in three-way to one-way is formed in the diversion trench; the turning plate body is fixedly provided with a turning plate wheel through a second friction bearing, the turning plate wheel generates pulse vibration through impact rotation of cement paste on one side of the one-way through hole in the diversion trench, and the second friction bearing is used for adjusting the rotating friction coefficient of the turning plate wheel; the output end of the outer sleeve is provided with a guide cone for guiding cement slurry to the outside of the vibration unit;
the detection unit comprises a vibration detector for detecting the vibration frequency of the intercepting type vibration well cementation device; a first pressure detector disposed inside the fluid chamber to detect a real-time pressure inside the fluid chamber; the second pressure detector is arranged inside the guide cone and used for detecting the real-time pressure inside the guide cone;
a central control unit connected to the first friction bearing, the second friction bearing, the vibration detector, the first pressure detector, the second pressure detector, and an external cement slurry injection device, respectively, the central control unit judges the real-time vibration frequency of the vibration unit through a set frequency range arranged in the central control unit, and adjusts the initial friction coefficient of the first friction bearing according to the determination result, the central control unit can determine the friction coefficient of the first friction bearing through the adjusting zone arranged in the central control unit, and adjusts the friction coefficient of the second friction bearing for supplement according to the judgment result, the central control unit adjusts the interval according to the friction coefficient of the second friction bearing, and controlling the real-time vibration frequency of the vibration unit by adjusting the injection pressure of the cement paste injection equipment, and adjusting the real-time vibration frequency of the vibration unit to be within a set frequency range.
2. The intercepting type vibration well cementation device according to claim 1, wherein a set frequency Fd and a set frequency difference Δ Fd are provided in the central control unit, the vibration detector detects a real-time vibration frequency Fs of the vibration unit and transmits the result to the central control unit, the central control unit calculates the real-time vibration frequency difference Δ Fs according to the real-time vibration frequency Fs and the set frequency Fd, the central control unit compares the real-time vibration frequency difference Δ Fs with the set frequency difference Δ Fd,
when the delta Fs is less than or equal to the delta Fd, the central control unit judges that the real-time vibration frequency of the vibration unit is within a set range, and the vibration state of the vibration unit is not adjusted;
when the delta Fs is larger than the delta Fd, the central control unit judges that the real-time vibration frequency of the vibration unit is not in the set range, and the central control unit compares the set frequency with the real-time vibration frequency to judge the vibration state of the vibration unit.
3. The shutoff-type vibration cementing device according to claim 2, wherein an initial friction coefficient Hac of the first friction bearing is provided in the central control unit, and when the central control unit determines that the real-time vibration frequency of the vibration unit is not within the set range, the central control unit compares the real-time vibration frequency Fs with a set frequency Fd,
when Fs is larger than Fd, the central control unit judges that the real-time vibration frequency of the vibration unit exceeds a set range, and the central control unit adjusts the initial friction coefficient of the first friction bearing to Hac ', Hac' ═ Hac + Hac x [ (Fs-Fd)/Fs ];
and when Fs is less than Fd, the central control unit judges that the real-time vibration frequency of the vibration unit is lower than a set range, and adjusts the initial friction coefficient of the first friction bearing to Hac', Hac ═ Hac-Hac × [ (Fd-Fs)/Fd ].
4. The intercepting type vibration well cementation device according to claim 3, wherein the central control unit is provided with a maximum friction coefficient Hax and a minimum friction coefficient Han of the first friction bearing, when the central control unit adjusts the initial friction coefficient of the first friction bearing to Hac ', the central control unit compares the initial friction coefficient Hac' with the maximum friction coefficient Hax and the minimum friction coefficient Han,
when Hac' is greater than Hax, the central control unit judges that the adjusted friction coefficient exceeds the maximum friction coefficient, and the central control unit adjusts the initial friction coefficient of the second friction bearing to control the real-time vibration frequency of the vibration unit;
when Han 'is less than or equal to Hac' and less than or equal to Hax, the central control unit judges that the adjusted friction coefficient is in an adjustable range, and the vibration detector detects the real-time vibration frequency of the adjusted vibration unit so as to judge whether the real-time vibration frequency of the vibration unit is in a set range;
when Hac' < Han, the central control unit judges that the adjusted friction coefficient is lower than the minimum friction coefficient, and the central control unit adjusts the initial friction coefficient of the second friction bearing to control the real-time vibration frequency of the vibration unit.
5. The intercepting type vibration well cementation device according to claim 4, wherein when the central control unit determines that the adjusted friction coefficient is within an adjustable range, the vibration detector detects the real-time vibration frequency Fs 'adjusted by the vibration unit, the central control unit calculates an adjusted real-time vibration frequency difference Δ Fs' according to the adjusted real-time vibration frequency Fs 'and a set frequency Fd, the central control unit compares the adjusted real-time vibration frequency difference Δ Fs' with the set frequency difference Δ Fd,
when the delta Fs' is less than or equal to the delta Fd, the central control unit judges that the adjusted real-time vibration frequency is within a set range, and adjustment is completed;
when the delta Fs 'is larger than the delta Fd, the central control unit judges that the adjusted real-time vibration frequency is not in the set range, the central control unit repeats the operation of comparing the set frequency with the real-time vibration frequency and adjusting and judging the initial friction coefficient of the first friction bearing until the delta Fs' is smaller than or equal to the delta Fd, and the adjustment is completed.
6. The intercepting type vibration cementing device according to claim 4, wherein the central control unit is provided with an initial friction coefficient Hbc of the second friction bearing, and when the central control unit determines that the adjusted friction coefficient exceeds the maximum friction coefficient or is lower than the minimum friction coefficient, the central control unit adjusts the initial friction coefficient Hbc of the second friction bearing,
when Hac '> Hax, the central control unit adjusts the initial friction coefficient of the first friction bearing to Hac', Hac ═ Hax, the central control unit adjusts the initial friction coefficient of the second friction bearing to Hbc ', Hbc ═ Hbc × (Hac'/Hax), the central control unit repeats the operations of judging the adjusted real-time vibration frequency and adjusting the initial friction coefficient of the first friction bearing, and adjusts the initial friction coefficient of the second friction bearing until the real-time vibration frequency of the vibration unit is detected to reach a set range, and the adjustment is completed;
when Hac '< Han, the central control unit adjusts the initial friction coefficient of the first friction bearing to Hac ″, Hac ═ Han, the central control unit adjusts the initial friction coefficient of the second friction bearing to Hbc ″, Hbc ═ Hbc × (Hac'/Han), the central control unit repeats the operations of judging according to the adjusted real-time vibration frequency and adjusting the initial friction coefficient of the first friction bearing, adjusts the initial friction coefficient of the second friction bearing until the real-time vibration frequency of the vibration unit is detected to reach a set range, and adjustment is completed.
7. The intercepting type vibration cementing device according to claim 6, wherein the central control unit is provided with a maximum friction coefficient Hbx and a minimum friction coefficient Hbn of the second friction bearing therein, when the central control unit adjusts the initial friction coefficient of the second friction bearing to Hbc ', the central control unit compares the initial friction coefficient Hbc' with the maximum friction coefficient Hbx and the minimum friction coefficient Hbn,
when Hbc' > Hbx, the central control unit judges that the initial friction coefficient of the first friction bearing reaches the maximum value and the adjusted initial friction coefficient of the second friction bearing exceeds the maximum friction coefficient, and the central control unit adjusts the injection pressure of the cement paste injection equipment to adjust the real-time vibration frequency of the vibration unit;
when Hbn Hbc' ≦ Hbx, the central control unit judges that the adjusted initial friction coefficient of the second friction bearing is in an adjustable range, and the central control unit does not adjust the injection pressure of the cement paste injection equipment;
when Hbc' < Hbn, the central control unit judges that the initial friction coefficient of the first friction bearing is lower than the minimum value and the adjusted initial friction coefficient of the second friction bearing is lower than the minimum friction coefficient, and the central control unit adjusts the injection pressure of the cement paste injection device so as to adjust the real-time vibration frequency of the vibration unit.
8. The intercepting vibration cementing device according to claim 7, wherein the central control unit obtains an injection pressure Pv of the cement slurry injection device, when the central control unit determines that Hbc ' < Hbn, the central control unit adjusts the friction coefficient of the second friction bearing to Hbc ", Hbc" ═ Hbn, the vibration detector detects the real-time vibration frequency Fs "of the vibration unit, the central control unit adjusts the injection pressure of the cement slurry injection device to Pv ', Pv ' ═ Pv + Pv × [ (Fd-Fs")/Fd ], the central control unit repeats the real-time vibration frequency determination operation of the vibration unit according to the set frequency range, adjusts the injection pressure of the cement slurry injection device, and completes the adjustment until the real-time vibration frequency adjusted by the vibration unit reaches the set frequency range.
9. The intercepting type vibration well cementation device according to claim 7, wherein a first standard pressure difference Pb1 and a second standard pressure difference Pb2 are provided in the center control unit, wherein Pb1 < Pb2, when the center control unit determines that Hbc' > Hbx, the first pressure detector detects a real-time pressure Pr inside the fluid chamber, the second pressure detector detects a real-time pressure Pc inside the guide cone, the center control unit calculates a real-time pressure difference Ps, Ps-Pc | inside the vibration unit according to the real-time pressure Pr inside the fluid chamber and the real-time pressure Pc inside the guide cone, the center control unit compares the real-time pressure difference Ps with the first standard pressure difference Pb1 and the second standard pressure difference Pb2,
when Ps is less than Pb1, the central control unit judges that the real-time pressure difference in the vibration unit is lower than a first standard pressure difference, adjusts the friction coefficient of the second friction bearing to Hbc ″, which is Hbx, and adjusts the injection pressure of the cement paste injection equipment according to the detected real-time vibration frequency of the vibration unit;
when Pb1 is not less than Ps and not more than Pb2, the central control unit judges that the real-time pressure in the vibration unit is between a first standard pressure difference and a second standard pressure difference, adjusts the friction coefficient of the second friction bearing to Hbc, and the Hbc is equal to Hbc, and adjusts the injection pressure of the cement paste injection equipment according to the detected real-time vibration frequency of the vibration unit;
when Ps is larger than Pb2, the central control unit judges that the real-time pressure difference in the vibration unit is higher than a second standard pressure difference, the central control unit adjusts the friction coefficient of the first friction bearing to Hac1, Hac1 ═ Hac, the central control unit adjusts the friction coefficient of the second friction bearing to Hbc ″, Hbc, and adjusts the injection pressure of the cement paste injection device according to the detected real-time vibration frequency of the vibration unit.
10. The intercepting type vibration well cementation device according to claim 9, wherein the central control unit obtains an injection pressure Pv of the cement slurry injection equipment, adjusts the friction coefficient of the first friction bearing and the second friction bearing according to a comparison result of the real-time pressure difference, the first standard pressure difference and the second standard pressure difference, detects the real-time vibration frequency Fs "of the vibration unit after the central control unit completes the adjustment of the friction coefficient, adjusts the injection pressure of the cement slurry injection equipment to Pv ', Pv' -Pv x [ (Fs" -Fd)/Fs "], repeats the real-time vibration frequency determination operation of the vibration unit according to the set frequency range, adjusts the injection pressure of the cement slurry injection equipment until the real-time vibration frequency adjusted by the vibration unit reaches the set frequency range, the adjustment is completed.
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