CN103091082A - Full drill rock breaking test system and test method thereof - Google Patents
Full drill rock breaking test system and test method thereof Download PDFInfo
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- CN103091082A CN103091082A CN 201110373932 CN201110373932A CN103091082A CN 103091082 A CN103091082 A CN 103091082A CN 201110373932 CN201110373932 CN 201110373932 CN 201110373932 A CN201110373932 A CN 201110373932A CN 103091082 A CN103091082 A CN 103091082A
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Abstract
The invention discloses a full drill rock breaking test system which mainly comprises a drill test frame (1), a lower rotating plate (2), a measuring connector (3) and a displacement sensor (4), wherein the lower rotating plate (2) is arranged below the drill test frame (1), and the measuring connector (3) and the displacement sensor (4) are installed on the drill test frame (1). The drill test frame (1) is connected with a driving device. The measuring connector (3) and the displacement sensor (4) are both connected with the same measuring and control device. The invention further discloses a test method based on the full drill rock breaking test system. The full drill rock breaking test system mainly detects rate of penetration and crushing bottom hole when a drill crushes different rocks under a certain drilling parameter, and rock breaking characteristics of the drill can be easily and truly reflected.
Description
Technical field
The present invention relates to the broken rock pilot system of a kind of full drill bit and test method thereof.
Background technology
In petroleum drilling, drill bit is the main tool of ravelly ground rock, is the important means that improves rate of penetration in petroleum drilling engineering, reduces drilling cost.In order to improve the efficiency of breaking rock of drill bit, reach the purpose that reduces costs, just must and select the drill bit that is fit to formation characteristics for different drilling stratum designs.The main method of research drill bit efficiency of breaking rock has site test and shop experiment both at home and abroad at present, site test is exactly the drill bit application at the scene that designs for Different Strata, and then revise design and processing again, and develop like this cycle that a specific character drill bit needs long, cost is high; Indoor main test method has the vertical indentation test of monodentate, the test of drill bit gear ring composite motion broken rock and full gauge bit drilling test.
The test that research is carried out for drill bit at present is mainly full gauge bit test and the test of drill bit gear ring composite motion broken rock, and full head dip test is mainly to detect the Fracture law that new drill creeps into the Different Strata rock; The test of drill bit gear ring composite motion broken rock is mainly the Fracture law of research different drill structure parameters, cutting structure and drilling parameter and formation rock.The test macro of existing full head dip test and the test of drill bit gear ring composite motion broken rock is mainly by drill bit, gear wheel and gear ring rotational speed pulse signal in sensor, tachometry instrument and data collecting card acquisition test process; By drill bit displacement, the pressure of the drill and the simulation torque signal in sensor, dynamic strain indicator and data collecting card acquisition test process.But along with further in-depth of drill bit research, a lot of problems that have existing head dip test test macro can not satisfy the needs of present stage drill bit research and new product development, such as: motion and the stressing conditions of research drill bit and 5 teeth, the analog quantity channel of existing two 8 channel data capture cards is inadequate, can not satisfy the expanded function of test needs comprehensively; Due to the impact of hydraulic system, motor and environment etc., the signal of dynamic strain indicator collection contains a large amount of noises, and the test figure accuracy is not high; The hardware device such as dynamic strain indicator and data collecting card is expensive, the test system hardware high in cost of production.Therefore in the urgent need to setting up a cover based on the head dip test test macro of modern test technology, with can be fast, accurately, motion and the stressing conditions of Real-time Collection drill bit and each tooth, thereby provide important research technique for new product development and the scientific design of drill bit.
The drill bit new product development must be through its performance of verification experimental verification on the basis of theory research, and head dip test has very important effect to the research and development premium quality product.Abroad, U.S. Smith Bits company, Hughes Christensen company, Halliburton company and Britain SchlumbergerCambridge company etc. have all set up the head dip test testing jig, drill bit research experiment newly developed is found out its relative merits, and correspondingly formulated the examination criteria of head dip test; Each company has all applied for corresponding drill bit design of Simulation patent simultaneously, wherein major part is take head dip test as the basis, many achievements in research have been obtained by carrying out head dip test, develop series of characteristics or high-performance drill bit, played very important effect for the mechanical separator speed that improves drill bit, crushing efficiency etc.
1975, built up the test stand of first full-scale simulation conditions down-hole in the salt lake city of Utah, USA, can be used for testing drill bit, subsurface tool and some mud motors.Apply drilling pressure with hydraulic control system, servo-control system can be controlled by the needs of test objective and creep into permanent the pressure of the drill, permanent drilling speed or permanent moment of torsion mode.In drilling process, the data that capable of dynamic is measured have: drilling depth amount and the penetration speed of covering stress, lithostatic stress, pore pressure and the drill bit of the pressure of the drill, rotating speed, moment of torsion, rock.1985, Britain's Schlumberger Cambridge company built up the wellbore test frame of the well-known artificial ground of another world, and this test stand can be simulated the pressure and temperature of well depth 5000m.The collection of its whole test operation control, the control of down-hole simulated conditions and test figure and the closed-loop control that computer system is all used in processing, its control and test macro are more advanced.
At home, the units such as Jiang-Han Area drill bit joint-stock company, Chengdu exchange factory, Southwest Petrol University, Daqing oil field carry out drill bit new product development and scientific design studies and have all set up corresponding head dip test frame, to improving China's bit performance and research, catching up with world standard and played certain effect.1989, the miniature bur test stand of situation at the bottom of a simulation well was built up in the drilling well of Beijing petroleum exploration and development research institute of China National Petroleum Corporation (CNPC).This test stand can do the following drill bit of 37/8in under 3500m well depth condition drilling test and carry out process of the test in data acquisition and analyzing and processing.The nineties, the drilling technique research institute of Daqing oil field builds up the machinery test stand of a simulation 6000m well depth condition.From 1981, drill bit research institute of Southwest Petrol University is just to point angle speed and gear wheel angular velocity research experiment, carry out the full gauge bit test on the large-size drill test stand, this test stand can apply the pressure of the drill of 300kN to drill bit, and record pulse signal and simulating signal in process of the test by sensor, input secondary instrument again and computing machine is processed, obtain the signals such as the pressure of the drill, moment of torsion, displacement and drill speed in process of the test.The beginning of the eighties, drill bit research institute of Southwest Petrol University is under the support energetically of China National Petroleum Corporation (CNPC), solving geometry of roller, kinematics series of theories problem, grasp drill bit and touched on the basis of the motion state of end tooth itself and rule thereof, built up the testing equipment that a simulation tooth-wheel bit tooth of initiating is made the hole process both at home and abroad.It can make the sample tooth make identical compound motion with true drill teeth, and by the operating process of control desk Control experiment, acquisition system acquisition test data are inputted computing machine again and carried out analyzing and processing.
These head dip test functions of the equipments imperfections, the operating console that various controls is housed by manually-operated is realized the control of whole process of the test, automaticity is low, particularly test macro adopts the signal of conventional hardware surveying instrument acquisition test process, function singleness, very flexible, expanded function limitation be large, be subject to external interference, collection signal contain a large amount of noises and hardware cost high.Complicated along with the increase of the petroleum drilling degree of depth and formation rock, more urgent according to the research work of Different Strata rock characteristics design and development characteristic drill bit, the importance of head dip test test seems more outstanding, the requirement that existing head dip test test macro does not reach the high-performance drill bit experimental test obviously.
Motion state and stress when tooth-wheel bit is worked in the shaft bottom are very complexes.Drill bit moves in the shaft bottom, except drill bit around self axis rotatablely move as clockwise direction and gear wheel around the bit leg axis is done counterclockwise to rotatablely move, also has the slip of axial longitudinal vibration and gear wheel, the compound motion that these several motions occur simultaneously, combine when being drilling well.Tooth-wheel bit is fractured rock under impact, crushing and the slip shear action that above-mentioned compound motion produces.
Can produce extensional vibration during roller bit cutting, in each vibration, compression lower drilling string when drill bit is up, when drill bit is descending drill string recover former length, its potential energy is converted into the dynamic loading of drill bit.During drill bit work, the power that tooth is applied on rock has static load (being added in the pressure of the drill on drill bit) and dynamic loading (drill bit and lower drilling string are accelerated to descend and the dynamic load of generation), when that is to say tooth impact grinding rock, the reacting force that drill bit is subject to rock also equals static load and dynamic loading sum.Drill bit except being subject to vertical static load and dynamic loading, due to drill string rotating, also will be subject to torsional interaction when underground work.When the pressure of the drill is larger, tooth wedging rock is darker, and especially tooth slides in the shaft bottom when larger, and the moment of torsion that drill bit bears is larger.
When tooth-wheel bit is worked in the shaft bottom, because drill bit produces longitudinal vibration in the shaft bottom, make drill string constantly compression and extension, lower drilling string passes to tooth to this periodic elastic deformation energy, produce tooth to impact, the granulitization of rock, this crumbling method is one of major way of tooth-wheel bit fractured rock.In tooth-wheel bit when work,, because the project organization of drill bit and the impact of stratum frictional resistance produce slip, rotating speed is faster, slippage is larger, and is larger to the shearing-crushing of rock, thereby shears bottom rock by the slip of tooth, improves crushing efficiency.Can find out in the research process of drill bit the brief analysis of tooth-wheel bit in shaft bottom motion, stressed and fractured rock situation according to above-mentioned, must effectively analyze the pressure of the drill, torsional interaction and drill bit that the broken rock motion of drill bit bears and the rotating speed of gear wheel.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, provide a kind of full drill bit to break the rock pilot system, the broken rock pilot system of this full drill bit mainly detects rate of penetration and the broken shaft bottom of drill bit broken different rocks under certain drilling parameter condition, can simply and can reflect truly that drill bit breaks the rock characteristics.
Purpose of the present invention is achieved through the following technical solutions: the broken rock pilot system of full drill bit, mainly consisted of by head dip test frame, the lower rotary table that is arranged at head dip test frame below, downhole joint and the displacement transducer that is arranged on the head dip test frame, described head dip test frame is connected with drive unit, and downhole joint and displacement transducer all are connected with same measure and control device.
Described drive unit mainly is made of the oil cylinder that is connected with the head dip test frame and the hydraulic control panel that is connected with oil cylinder.
Described measure and control device mainly is made of the dynamic strain indicator, the data acquisition device that is connected with dynamic strain indicator that all are connected with displacement transducer with downhole joint and the computing machine that is connected with data acquisition device.
Described data acquisition device also is connected with the tachometry instrument.
Described tachometry instrument is connected with magnetic core sensor, the Surface Contact of described magnetic core sensor and lower rotary table.
Described downhole joint and displacement transducer are installed in the lower surface of head dip test frame.
Test method based on the broken rock pilot system of above-mentioned full drill bit is characterized in that, comprises the following steps:
(a) at first magnetic core sensor is arranged on drill bit and lower rotary table;
(b) install again on the lower rotary table that rock is fixed on test stand;
(c) start respectively clear water, SCR speed governing set, hydraulic control panel, gently press slow-speed to make the shaft bottom;
(d) shaft bottom is made afterwards the pressure of the drill, moment of torsion and drilling depth is marked zero, and adjusts dynamic strain indicator, drill bit and gear wheel tachometry instrument, data acquisition system (DAS);
(e) carry out at last carrying out under the different parameters condition the broken rock test of drill bit, the rotating speed that has obtained the pressure of the drill, moment of torsion, drilling depth, rate of penetration, drill speed, each gear wheel and the drill bit of the broken rock of drill bit under the different parameters condition is bottom hole pattern when.
In described step (e), drill bit the pressure of the drill, torque measurement realize by the stickup foil gauge that is arranged on thin ancient piece of jade, round, flat and with a hole in its centre joint.
In described step (e), drilling depth is to use displacement transducer, then all passes through dynamic strain indicator, data collecting instrument and computing machine and obtains.
In described step (e), drill speed is measured by being fixed on the magnetic core sensor on lower rotary table, surveys the copper sheet that lower rotary table pastes and obtains.
In sum, the invention has the beneficial effects as follows: mainly detect rate of penetration and the broken shaft bottom of drill bit broken different rocks under certain drilling parameter condition, can simply and can reflect truly that drill bit breaks the rock characteristics.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
As shown in Figure 1, the full drill bit that the present invention relates to breaks the rock pilot system, mainly consisted of by head dip test frame 1, the lower rotary table 2 that is arranged at head dip test frame 1 below, downhole joint 3 and the displacement transducer 4 that is arranged on head dip test frame 1, described head dip test frame 1 is connected with drive unit, and downhole joint 3 is connected with displacement transducer and all is connected with same measure and control device.
Described drive unit mainly is made of the oil cylinder 5 that is connected with head dip test frame 1 and the hydraulic control panel 6 that is connected with oil cylinder 5.
Described measure and control device mainly is made of the dynamic strain indicator 7, the data acquisition device 8 that is connected with dynamic strain indicator 7 that all are connected with displacement transducer 4 with downhole joint 3 and the computing machine 9 that is connected with data acquisition device 8.
Described data acquisition device 8 also is connected with tachometry instrument 10.
Described tachometry instrument 10 is connected with magnetic core sensor 11, the Surface Contact of described magnetic core sensor 11 and lower rotary table 2.
Described downhole joint 3 and displacement transducer 4 are installed in the lower surface of head dip test frame 1.
Test method based on the broken rock pilot system of above-mentioned full drill bit is characterized in that, comprises the following steps:
(a) at first magnetic core sensor is arranged on drill bit and lower rotary table;
(b) install again on the lower rotary table that rock is fixed on test stand;
(c) start respectively clear water, SCR speed governing set, hydraulic control panel, gently press slow-speed to make the shaft bottom;
(d) shaft bottom is made afterwards the pressure of the drill, moment of torsion and drilling depth is marked zero, and adjusts dynamic strain indicator, drill bit and gear wheel tachometry instrument, data acquisition system (DAS);
(e) carry out at last carrying out under the different parameters condition the broken rock test of drill bit, the rotating speed that has obtained the pressure of the drill, moment of torsion, drilling depth, rate of penetration, drill speed, each gear wheel and the drill bit of the broken rock of drill bit under the different parameters condition is bottom hole pattern when.
In described step (e), drill bit the pressure of the drill, torque measurement realize by the stickup foil gauge that is arranged on thin ancient piece of jade, round, flat and with a hole in its centre joint.
In described step (e), drilling depth is to use displacement transducer, then all passes through dynamic strain indicator, data collecting instrument and computing machine and obtains.
In described step (e), drill speed is measured by being fixed on the magnetic core sensor on lower rotary table, surveys the copper sheet that lower rotary table pastes and obtains.
In addition, when in test carrying out data acquisition, take interval each test parameters sampling in 1 second 10 times for the pressure of the drill, moment of torsion and drilling depth, drill bit and gear wheel rotate the pulse signal that produces and gather at any time.Therefore, each test parameters value that test each time obtains is all after drill bit creeps into normally, creeps into the mean value of respectively testing sampled point of following period of time.
Principle of work of the present invention is: drill bit the pressure of the drill, torque measurement are to paste foil gauge on thin ancient piece of jade, round, flat and with a hole in its centre joint, and drilling depth is to use displacement transducer, then all pass through dynamic strain indicator, data collecting instrument and computing machine and obtain.The gear wheel tachometric survey is by being fixed on the magnetic core sensor (surveying the cone outer row tooth) on frame of the bit, namely whenever the top of one piece of cone outer row tooth process magnetic core sensor, the latter just sends a pulse signal, these signals obtain by drill bit and gear wheel tachometry instrument, data collecting instrument and computing machine, it is by being fixed on the magnetic core sensor on lower rotary table that drill speed is measured, and surveys the copper sheet that lower rotary table pastes and obtains.Applying drill bit the pressure of the drill is to realize by the size that deadweight and the adjusting hydraulic control panel of head dip test frame are controlled the oil cylinder oil inlet amount, and it is to realize by SCR speed governing set, direct current generator, governing box and test stand lower rotary table that drill speed is regulated.
The above is only preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations that above embodiment is done are within all falling into protection scope of the present invention.
Claims (10)
1. full drill bit breaks the rock pilot system, it is characterized in that, mainly consisted of by head dip test frame (1), the lower rotary table (2) that is arranged at head dip test frame (1) below, downhole joint (3) and the displacement transducer (4) that is arranged on head dip test frame (1), described head dip test frame (1) is connected with drive unit, and downhole joint (3) is connected 4 with displacement transducer) all be connected with same measure and control device.
2. the broken rock pilot system of full drill bit according to claim 1, is characterized in that, described drive unit is mainly by the oil cylinder (5) that is connected with head dip test frame (1) and hydraulic control panel (6) formation that is connected with oil cylinder (5).
3. full drill bit according to claim 1 breaks the rock pilot system, it is characterized in that, described measure and control device mainly is made of the dynamic strain indicator (7), the data acquisition device (8) that is connected with dynamic strain indicator (7) that all are connected with displacement transducer (4) with downhole joint (3) and the computing machine (9) that is connected with data acquisition device (8).
4. the broken rock pilot system of full drill bit according to claim 3, is characterized in that, described data acquisition device (8) also is connected with tachometry instrument (10).
5. the broken rock pilot system of full drill bit according to claim 3, is characterized in that, described tachometry instrument (10) is connected with magnetic core sensor (11), the Surface Contact of described magnetic core sensor (11) and lower rotary table (2).
6. the broken rock pilot system of full drill bit according to claim 1, is characterized in that, described downhole joint (3) and displacement transducer (4) are installed in the lower surface of head dip test frame (1).
7. based on the test method of the broken rock pilot system of above-mentioned full drill bit, it is characterized in that, comprise the following steps:
(a) at first magnetic core sensor is arranged on drill bit and lower rotary table;
(b) install again on the lower rotary table that rock is fixed on test stand;
(c) start respectively clear water, SCR speed governing set, hydraulic control panel, gently press slow-speed to make the shaft bottom;
(d) shaft bottom is made afterwards the pressure of the drill, moment of torsion and drilling depth is marked zero, and adjusts dynamic strain indicator, drill bit and gear wheel tachometry instrument, data acquisition system (DAS);
(e) carry out at last carrying out under the different parameters condition the broken rock test of drill bit, the rotating speed that has obtained the pressure of the drill, moment of torsion, drilling depth, rate of penetration, drill speed, each gear wheel and the drill bit of the broken rock of drill bit under the different parameters condition is bottom hole pattern when.
8. test method according to claim 7, is characterized in that, in described step (e), drill bit the pressure of the drill, torque measurement realize by the stickup foil gauge that is arranged on thin ancient piece of jade, round, flat and with a hole in its centre joint.
9. test method according to claim 7, is characterized in that, in described step (e), drilling depth is to use displacement transducer, then all passes through dynamic strain indicator, data collecting instrument and computing machine and obtain.
10. test method according to claim 7, is characterized in that, in described step (e), drill speed is measured by being fixed on the magnetic core sensor on lower rotary table, surveys the copper sheet that lower rotary table pastes and obtain.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104278960A (en) * | 2013-07-05 | 2015-01-14 | 中国石油天然气股份有限公司 | Performance testing method of horizontal well rotary jet device |
| CN105158001A (en) * | 2015-08-21 | 2015-12-16 | 中国地质大学（北京） | Experiment table for simulating micro-drilling operation in vacuum and waterless condition |
| CN106500978A (en) * | 2016-11-02 | 2017-03-15 | 中国电建集团成都勘测设计研究院有限公司 | Fragmented rock body reaction torque simulation test device during TBM cutterhead card machines |
| CN107941448A (en) * | 2018-01-11 | 2018-04-20 | 山东建筑大学 | A kind of major diameter subland drill falls detection method and device |
| CN111411933A (en) * | 2020-03-27 | 2020-07-14 | 中国石油集团工程技术研究院有限公司 | Method for evaluating underground working condition of PDC (polycrystalline diamond compact) drill bit |
| CN112459765A (en) * | 2020-12-08 | 2021-03-09 | 北京三一智造科技有限公司 | System and method for collecting load data of rotary drilling tool |
| US11959375B2 (en) | 2020-03-27 | 2024-04-16 | Cnpc Engineering Technology R&D Company Limited | Method for evaluating downhole working condition of a PDC bit |
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- 2011-11-07 CN CN 201110373932 patent/CN103091082A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278960A (en) * | 2013-07-05 | 2015-01-14 | 中国石油天然气股份有限公司 | Performance testing method of horizontal well rotary jet device |
| CN105158001A (en) * | 2015-08-21 | 2015-12-16 | 中国地质大学（北京） | Experiment table for simulating micro-drilling operation in vacuum and waterless condition |
| CN106500978A (en) * | 2016-11-02 | 2017-03-15 | 中国电建集团成都勘测设计研究院有限公司 | Fragmented rock body reaction torque simulation test device during TBM cutterhead card machines |
| CN106500978B (en) * | 2016-11-02 | 2019-02-15 | 中国电建集团成都勘测设计研究院有限公司 | Fragmented rock body reaction torque simulation test device when TBM cutterhead card machine |
| CN107941448A (en) * | 2018-01-11 | 2018-04-20 | 山东建筑大学 | A kind of major diameter subland drill falls detection method and device |
| CN107941448B (en) * | 2018-01-11 | 2023-05-09 | 山东建筑大学 | Method and device for detecting dropping of large-diameter stepped drill bit |
| CN111411933A (en) * | 2020-03-27 | 2020-07-14 | 中国石油集团工程技术研究院有限公司 | Method for evaluating underground working condition of PDC (polycrystalline diamond compact) drill bit |
| CN111411933B (en) * | 2020-03-27 | 2021-01-12 | 中国石油集团工程技术研究院有限公司 | Method for evaluating underground working condition of PDC (polycrystalline diamond compact) drill bit |
| US11959375B2 (en) | 2020-03-27 | 2024-04-16 | Cnpc Engineering Technology R&D Company Limited | Method for evaluating downhole working condition of a PDC bit |
| CN112459765A (en) * | 2020-12-08 | 2021-03-09 | 北京三一智造科技有限公司 | System and method for collecting load data of rotary drilling tool |
| CN112459765B (en) * | 2020-12-08 | 2023-10-20 | 北京三一智造科技有限公司 | System and method for collecting load data of rotary drilling tool |
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Application publication date: 20130508 |