CN101493004B - Cracking agent precision control method - Google Patents
Cracking agent precision control method Download PDFInfo
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- CN101493004B CN101493004B CN2009100212907A CN200910021290A CN101493004B CN 101493004 B CN101493004 B CN 101493004B CN 2009100212907 A CN2009100212907 A CN 2009100212907A CN 200910021290 A CN200910021290 A CN 200910021290A CN 101493004 B CN101493004 B CN 101493004B
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- gel breaker
- control
- screw
- chip microcomputer
- hydraulic motor
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Abstract
The invention belongs to an automatic and accurate control method for adding amount of gel breaker in petroleum fracturing construction, and is characterized in that a gear speed reducer (1) is connected with a spiral hydraulic motor via a shaft joint, a case (6) of gel breaker is fixed at one end of the gear speed reducer (1) via a flange (2), a screw (3) penetrates the case (6) of gel breaker and is connected with an output shaft of the gear speed reducer (1), the lateral wall of the case (6) of the gel breaker is provided with an extended pipeline of the screw (3), a discharge hole (5) is installed below the pipeline, a quick card (4) is sealed on the port of the extended pipeline of the case (6) of the gel breaker, and the screw (3) is limited on a horizontal axis of the screw (3) and the output shaft of the gear speed reducer (1); and the spiral hydraulic motor drives spiral rotation by control signals of a singlechip or a manual knob and the gel breaker is added to fracturing fluid. Truthful data of adding timing, amount and wedge adding slope of the gel breaker is obtained by automatically controlling wedge adding of the gel breaker and monitoring and recording related data by a computer.
Description
Technical field
The invention belongs to the oil fracturing construction auxiliary equipment, mainly is to be used for the cracking agent precision control method automatically accurately controlled of fracturing process to the gel breaker addition.
Background technology
Pressure break still is the main means that the stratum raising the output is transformed, and for the row of returning smoothly of later stage fracturing liquid, must in fracturing liquid, add gel breaker.The oil field uses aqueous fracturing fluid to break the glue microcapsule degelling agent in a large number both at home and abroad.Microcapsule degelling agent is the insulation dressing that inclusion one deck prevents water intrusion on the ammonium persulfate surface, and the insulation dressing has shielding action to gel breaker, and discharges under certain conditions, thereby has reached the purpose that delays brokenly glue.Microcapsule degelling agent has the good slow release performance, makes fracturing fluid in construction, can keep higher prop-carrying capacity, prevents the broken in advance glue of fracturing fluid; Fracturing liquid rubber-breaking water is thorough; Improve of the fracturing fluid anti-row's effect, reduce injury, improve effect of increasing production stratum and proppant.Although microcapsule degelling agent has good physics and chemical property, quantity and the mode that adds also there is the strict requirement of comparison.If it is incorrect that the adding opportunity of gel breaker, quantity and wedge shape add slope; Can influence the normal construction of pressure break; Can influence the later stage go into ground liquid the normally row of returning; Fracturing fluid recovery (backflow) has determined output effect after the transformation of stratum to a great extent, the accurate control, metering, the recording and tracking that how add through gel breaker addition wedge shape, thus explore the influence of gel breaker to characteristic such as construction liquid prop-carrying capacity, frictional resistance and follow-up discharge opeing effect; When guaranteeing to accomplish the pressing crack construction task efficiently smoothly, farthest returning and entering ground liquid is our urgent problem.
Reason owing to equipment and control aspect; There is not at present to be directed against specially isolated plant and the special-purpose wedge shape control appliance that microcapsule degelling agent adds; The artificial method that adds is still adopted in the adding of the microcapsule degelling agent in China oil field in a large number, is difficult to accomplish that the accurate control of addition and wedge shape add mode, for this reason; Through this cracking agent precision control method; The wedge shape that realizes gel breaker adds control automatically, and can realize computer monitoring and record related data, for the development of fields of science more provides technical guarantee.
Summary of the invention
The purpose of this invention is to provide a kind of cracking agent precision control method; Wedge shape through real gel breaker adds control automatically; And with computer monitoring and record related data; Later on through paying a return visit on-the-spot actual discharge opeing effect and stratum production capacity situation, obtain the True Data that the gel breaker science adds opportunity, quantity and wedge shape adding slope at fracturing work, for pressing crack construction carry out smoothly with the smooth discharge of stratum liquid science data and foundation are provided.
The objective of the invention is to realize like this; A kind of cracking agent precision control method; It is characterized in that: gear reduction unit links to each other with the screw hydraulic motor through shaft coupling, and the gel breaker casing is fixed on gear reduction unit one end through flange, and screw rod penetrates the gel breaker casing and links to each other with the gear reduction unit output shaft; The gel breaker wall box has screw rod to extend pipeline; There is discharging opening the pipeline below, and fast card is enclosed on the gel breaker casing extension line cap, and screw rod is limited on screw rod and the gear reduction unit output shaft horizontal axis; The screw hydraulic motor is electrically connected with controlling organization, and the controlling organization control signal of passing through drives the spiral rotation, and gel breaker is added fracturing fluid.
Described gel breaker casing is that both sides are trapezoidal shape and are added with the airtight casing of end cap, and the casing lower end is for can hold the screw rod cone-shaped structure.
Described screw rod is of a size of external diameter 63.5mm, diameter of axle 20.0mm, the thick 2.0mm of leaf, helical pitch 30.0mm; Perhaps be external diameter 55mm, diameter of axle 20.0mm, the thick 2.0mm of leaf, helical pitch 30.0mm.
The speed reducing ratio of described gear reduction unit is 1/50, perhaps is 1/15.
Described controlling organization comprises Single-chip Controlling unit, interface circuit unit I/O box, demonstration and input block touch display screen, hydraulic motor deceleration device and conveyor screw machine assembly, revolution speed sensing feedback unit; Touch display screen is connected with single-chip microcomputer through interface circuit unit I/O box; Hydraulic motor slows down and the conveyor screw machine assembly is electrically connected with the output of single-chip microcomputer D/A change-over circuit, and the revolution speed sensing feedback unit is electrically connected with the single-chip microcomputer input port; Touch display screen is connected to single-chip microcomputer through interface and driver module, through the subsidiary D/A change-over circuit of single-chip microcomputer, converts the control electric current to; Drive electromagnetic valve through amplifying circuit; Controlled hydraulic system pressure and discharge capacity, thereby control conveyor screw rotating speed, control additive addition.
Described single-chip microcomputer based on the variety classes gel breaker proportion of setting, is calculated to be the quantity that per minute adds based on predefined instruction; Accomplish the data computation of gel breaker addition and revolution speed of screw corresponding relation, and obtain final actual speed, through automatically controlled ratio hydraulic valve control flow rate of hydraulic system and pressure with testing the control corrected parameter that obtains; Thereby control hydraulic motor rotating speed; Through deceleration device, drive the conveyor screw rotation, accomplish the control of gel breaker addition; Monitoring and feedback signal by the speed probe collection are transmitted back to single-chip microcomputer, and single-chip microcomputer through PID control, sends control signal based on the difference of actual speed and rotating speed of target rapidly.
Characteristics of the present invention are: through the accurate adding control of this device to gel breaker, can realize that the automatic control wedge shape of microcapsule degelling agent adds, in labor savings; Addition and adding form are more scientific and reasonable, and all data can write down preservation, follow the tracks of through combining later stage discharge opeing effect; Can grope the adding pattern of different blocks gel breaker; Guarantee best construction effect and later stage discharge opeing effect, make the stratum production capacity obtain maximum release, create better economic benefit.In operation, can further improve equipment integrated automation controlling level, reduce the influence of human factor, improve service level construction.
Description of drawings
Below in conjunction with the embodiment accompanying drawing the present invention is further specified.
Fig. 1 carries out the frame for movement sketch map for the embodiment spiral;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 is the automatic control data acquisition system of a single-chip microcomputer flow chart.
Among the figure: 1, gear reduction unit; 2, flange; 3, screw rod; 4, fast card; 5, discharging opening; 6, gel breaker casing.
The specific embodiment
Embodiment such as Fig. 1, Fig. 2, shown in Figure 3; Gear reduction unit 1 links to each other with the screw hydraulic motor through shaft coupling; Gel breaker casing 6 is fixed on gear reduction unit 1 one ends through flange 2; Gel breaker casing 6 is trapezoidal shape for both sides and is added with the airtight casing of end cap, and the casing lower end is for can hold screw rod 3 cone-shaped structures.Screw rod 3 penetrates gel breaker casing 6 and links to each other with gear reduction unit 1 output shaft; Gel breaker casing 6 sidewalls have screw rod 3 to extend pipeline; There is discharging opening 5 the pipeline below; Fast card 4 is enclosed on the gel breaker casing 6 extension line caps, and screw rod 3 is limited on screw rod 3 and the gear reduction unit 1 output shaft horizontal axis; The screw hydraulic motor drives the spiral rotation through the control signal of single-chip microcomputer or manual knob, and gel breaker is added fracturing fluid.
Through the manual automatic switching control equipment of a cover, the screw hydraulic motor can select to accept the control signal from single-chip microcomputer or manual knob, through deceleration device gear reduction unit 1, drives screw rod 3 rotations, thereby gel breaker is added fracturing fluid.In order to satisfy the control range that gel breaker maximum range and minimum range surpass 100 times, we have used the screw rod of two cover different sizes, and screw rod 3 is of a size of external diameter 63.5mm, diameter of axle 20.0mm, the thick 2.0mm of leaf, helical pitch 30.0mm.Perhaps be external diameter 55mm, diameter of axle 20.0mm, the thick 2.0mm of leaf, helical pitch 30.0mm.The different speed reducing ratio that is provided with, the speed reducing ratio of gear reduction unit 1 are 1/50 or are 1/15.Automatically carry out relay control by single-chip microcomputer.Simultaneously, in order to satisfy the continuity and the linearity of control, the control range of two double helix has been set rational control folding region, the accurate interpolation of whole adition process of assurance.
This control mechanism is made up of electronically controlled hydraulic system, and is as shown in Figure 4: this system is made up of five parts:
First is the single board computer control module.Single-chip microcomputer is Automatic Centering Control and input channel, the storage center of all inputs such as output channel and PID control channel, output channel controlling parameter.Under automatic control mode, goal task is calculated as revolution speed of screw control figure signal, through the subsidiary D/A change-over circuit of single-chip microcomputer; Convert the control electric current to, drive electromagnetic valve, controlled hydraulic system pressure and discharge capacity through amplifying circuit; Thereby control conveyor screw rotating speed, control additive addition.PID control is adopted in process control, realizes the accurately control in real time of revolution speed of screw, and error is remained on below 5%.Second portion is interface circuit unit (I/O box).The effect of I/O box mainly is the communication that realizes between touch display screen and the single-chip microcomputer.Through I/O box, single-chip microcomputer can use the RS232 serial ports to be connected with touch display screen, realizes long-range each item data information admission simultaneously.Third part is for showing and input block (touch display screen).Touch display screen has been equivalent to concentrate the function of the display and the keyboard of computer, and it is the programmed instruction input and the display output units structure of single-chip microcomputer.The 4th part is hydraulic motor, deceleration device and conveyor screw machine assembly.The 5th part is the revolution speed sensing feedback unit.
The K65 touch-screen is parameter output and input block; Be connected to single-chip microcomputer through interface and driver module; Can receive the various control data information of demonstration, the control instruction that simultaneously also can import each item control coefrficient, task parameters and need single-chip microcomputer to accomplish through touch-screen from single-chip microcomputer.Single-chip microcomputer according to the variety classes gel breaker proportion of setting, is calculated to be the quantity that per minute adds according to predefined instruction; Accomplish the data computation of gel breaker addition and revolution speed of screw corresponding relation, and obtain final actual speed, through automatically controlled ratio hydraulic valve controlled hydraulic system flow and pressure with testing the control corrected parameter that obtains; Thereby control hydraulic motor rotating speed; Through deceleration device, drive the conveyor screw rotation, accomplish the control of gel breaker addition.Monitoring and feedback signal by the speed probe collection are transmitted back to single-chip microcomputer; Single-chip microcomputer is according to the difference of actual speed and rotating speed of target; Through PID control, send control signal rapidly, the pid parameter that we obtain through experiment is set the control system that is input in advance; The high speed reaction that both can guarantee to control can prevent that also the result that the control signal overshoot causes from departing from.Simultaneously,, these information are sent into computer through serial ports of computers, accomplish the monitoring and the collection analysis of data by the computer that acquisition software is housed through the interface circuit of special use.In order to accomplish above-mentioned work; Also need carry out the calibration of revolution speed of screw control, obtain corrected parameter, because an ideal control should be linear fully; But actual control system is not linear; For obtaining the relative Linear Control relation between gel breaker addition and the additive pump rotating speed, need carry out the Linear Control correction to the control curve, calculate COEFFICIENT0, COEFFICIENT1, COEFFICIENT2, COEFFICIENT3 value with 3 power equations of linear regression.Their value is input among ANALIG OUT screen additive pump channel C OEFFICIENT0, COEFFICIENT1, COEFFICIENT2, the COEFFICIENT3 successively; And sampled value is on average controlled in input in AVERAGE COUNTS option; The minimum speed value of input additive pump in LOW LIMIT option; The maximum (top) speed value of a solid additive pump of input in HIGH LIMIT option, and confirm and store.After these work were accomplished, the control system just can control according to our needs.Control mode can be selected manually control and control automatically.When automatic control, as long as set different stage additions, computer just can be according to setting the adding control of completion stage, and according to the requirement of technology, computer also can calculate linear recruitment automatically, and the wedge shape of accomplishing gel breaker adds.This shows that it is an interactive operation system, the numerical value of all sessions definition both can be regulated in system carries out the process in this stage, also can begin preceding adjusting at sessions.Two double helix are automatic or manual work simultaneously both, also can one manual one automatically, can switch arbitrarily in the course of work.They both can be automatic, also can not rely on monolithic and automatic control system and independent manual work.On adding, both step-by-step system can be used, also progressive mode can be used like control mode.
Claims (4)
1. cracking agent precision control method; It is characterized in that: gear reduction unit (1) links to each other with the screw hydraulic motor through shaft coupling; Gel breaker casing (6) is fixed on gear reduction unit (1) one end through flange (2); Screw rod (3) penetrates gel breaker casing (6) and links to each other with gear reduction unit (1) output shaft, and gel breaker casing (6) sidewall has screw rod (3) to extend pipeline, and there is discharging opening (5) the pipeline below; Fast card (4) is enclosed on gel breaker casing (6) the extension line cap, and screw rod (3) is limited on screw rod (3) and gear reduction unit (1) the output shaft horizontal axis; The screw hydraulic motor is electrically connected with controlling organization, and the controlling organization control signal of passing through drives the spiral rotation, and gel breaker is added fracturing fluid; Described controlling organization comprises Single-chip Controlling unit, interface circuit unit, demonstration and input block, hydraulic motor deceleration device and conveyor screw machine assembly, revolution speed sensing feedback unit; Touch display screen is connected with single-chip microcomputer through the interface circuit unit; Hydraulic motor slows down and the conveyor screw machine assembly is electrically connected with the output of single-chip microcomputer D/A change-over circuit, and the revolution speed sensing feedback unit is electrically connected with the single-chip microcomputer input port; Touch display screen is connected to single-chip microcomputer through interface and driver module, through the subsidiary D/A change-over circuit of single-chip microcomputer, converts the control electric current to; Drive electromagnetic valve through amplifying circuit; Controlled hydraulic system pressure and discharge capacity, thereby control conveyor screw rotating speed, control additive addition; Described single-chip microcomputer according to the variety classes gel breaker proportion of setting, is calculated to be the quantity that per minute adds according to predefined instruction; Accomplish the data computation of gel breaker addition and revolution speed of screw corresponding relation, and obtain final actual speed, through automatically controlled ratio hydraulic valve controlled hydraulic system flow and pressure with testing the control corrected parameter that obtains; Thereby control hydraulic motor rotating speed; Through deceleration device, drive the conveyor screw rotation, accomplish the control of gel breaker addition; Monitoring and feedback signal by the speed probe collection are transmitted back to single-chip microcomputer, and single-chip microcomputer through PID control, sends control signal according to the difference of actual speed and rotating speed of target rapidly.
2. cracking agent precision control method according to claim 1 is characterized in that: described gel breaker casing (6) is trapezoidal shape for both sides and is added with the airtight casing of end cap, and the casing lower end is for can hold screw rod (3) cone-shaped structure.
3. cracking agent precision control method according to claim 1 is characterized in that: described screw rod (3) is of a size of external diameter 63.5mm, diameter of axle 20.0mm, the thick 2.0mm of leaf, helical pitch 30.0mm; Perhaps be external diameter 55mm, diameter of axle 20.0mm, the thick 2.0mm of leaf, helical pitch 30.0mm.
4. cracking agent precision control method according to claim 1 is characterized in that: the speed reducing ratio of described gear reduction unit (1) is 1/50, perhaps is 1/15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100212907A CN101493004B (en) | 2009-02-27 | 2009-02-27 | Cracking agent precision control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100212907A CN101493004B (en) | 2009-02-27 | 2009-02-27 | Cracking agent precision control method |
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| CN101493004A CN101493004A (en) | 2009-07-29 |
| CN101493004B true CN101493004B (en) | 2012-07-04 |
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| CN2009100212907A Expired - Fee Related CN101493004B (en) | 2009-02-27 | 2009-02-27 | Cracking agent precision control method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339423A (en) * | 2017-01-22 | 2018-07-31 | 温康 | A kind of continuous compounding process method of pulvis fracturing fluid |
| CN109322651A (en) * | 2018-11-28 | 2019-02-12 | 中国石油集团渤海钻探工程有限公司 | A kind of automatic dispensing device of pressure break capsule breaker and put-on method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303462A (en) * | 1998-05-29 | 2001-07-11 | 3M创新有限公司 | Encapsulated breakers, compositions and methods of use |
| GB2383809A (en) * | 2001-11-13 | 2003-07-09 | Baker Hughes Inc | Fracturing fluids for delayed flow back operations |
| CN1987044A (en) * | 2006-11-16 | 2007-06-27 | 大庆油田有限责任公司 | Method for adding hydraulic fractured well gel breaker |
| CN201372789Y (en) * | 2009-02-27 | 2009-12-30 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Device for accurately controlling quantity of gel breaker |
-
2009
- 2009-02-27 CN CN2009100212907A patent/CN101493004B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303462A (en) * | 1998-05-29 | 2001-07-11 | 3M创新有限公司 | Encapsulated breakers, compositions and methods of use |
| GB2383809A (en) * | 2001-11-13 | 2003-07-09 | Baker Hughes Inc | Fracturing fluids for delayed flow back operations |
| CN1987044A (en) * | 2006-11-16 | 2007-06-27 | 大庆油田有限责任公司 | Method for adding hydraulic fractured well gel breaker |
| CN201372789Y (en) * | 2009-02-27 | 2009-12-30 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Device for accurately controlling quantity of gel breaker |
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Granted publication date: 20120704 Termination date: 20180227 |