CN104763407B - Under balance pressure drilling broken rock analogue experiment installation and its analogue experiment method - Google Patents
Under balance pressure drilling broken rock analogue experiment installation and its analogue experiment method Download PDFInfo
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- CN104763407B CN104763407B CN201510063029.9A CN201510063029A CN104763407B CN 104763407 B CN104763407 B CN 104763407B CN 201510063029 A CN201510063029 A CN 201510063029A CN 104763407 B CN104763407 B CN 104763407B
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- 238000005553 drilling Methods 0.000 title claims abstract description 152
- 239000011435 rock Substances 0.000 title claims abstract description 107
- 238000002474 experimental method Methods 0.000 title claims abstract description 46
- 238000009434 installation Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 65
- 238000004088 simulation Methods 0.000 claims abstract description 42
- 238000012856 packing Methods 0.000 claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 claims abstract description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 6
- 238000011160 research Methods 0.000 abstract description 5
- 238000009533 lab test Methods 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 102000016938 Catalase Human genes 0.000 description 1
- 108010053835 Catalase Proteins 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Geology (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates under balance pressure drilling broken rock analogue experiment installation and its analogue experiment method, under balance pressure drilling broken rock analogue experiment installation therein includes frame, rotary system, spraying-preventing system, autoclave, data acquisition logging system, the active rotation assembly of spraying-preventing system is installed on the top of autoclave, and packing unit is provided with active rotation assembly；Autoclave top closure is formed drilling fluid hydraulic cavities by the active rotation assembly for being provided with packing unit, and drilling rod is passed through and extend into autoclave in the middle of packing unit；There are the horizontal load hydraulic cavities of annular in autoclave, horizontal load hydraulic cavities are looped around outside core holding unit, and strata pressure hydraulic cavities are supported on below rock core, horizontal load hydraulic cavities and strata pressure hydraulic cavities are respectively positioned on lifting supporting plate；The upper end connection lifting supporting plate of plunger, the lower end of plunger connects the pressure of the drill simulation hydraulic cavities；Displacement transducer is housed on plunger.The present invention really simulates the moving situation of bit broken rock under under balance pressure drilling downhole condition, for the research of under balance pressure drilling rock breaking mechanism provides laboratory experiment support.
Description
Technical field
The present invention relates to under-balanced drilling technology, and in particular to be under balance pressure drilling broken rock analogue experiment installation and
Its analogue experiment method.
Background technology
Under balance pressure drilling refers to that shaft bottom drilling well liquid columnpressure is less than strata pressure in drilling process, it is allowed to which formation fluid has
The entrance well of control simultaneously recycles a kind of drilling mode of well.Under balance pressure drilling is conducive to recognizing, evaluate, find and protecting oil
Gas reservoir, becomes apparent especially for advantage for hyposmosis and unconventional reservoir；Simultaneously because under balance pressure drilling uses negative pressure
Drilling, eliminates shaft bottom chip hold down effect caused by Overbalance Drilling, and the removing and drill bit for being conducive to shaft bottom landwaste are broken to rock
It is broken, rate of penetration can be increased substantially, mitigate the service life of the abrasion extension drill bit of drill bit, so that shorten drilling period,
Reduce drilling well integrated cost.
The negative pressure drilling condition of under balance pressure drilling changes the stress state of bottom rock, its rock-cracking mechanism with it is excessively flat
Weighing apparatus drilling well is compared and there occurs larger change, and the research of the rock breaking mechanism of under balance pressure drilling at present focuses primarily upon theory analysis rank
Section, lacks necessary laboratory experiment support and checking analysis.
1st, under balance pressure drilling broken rock simulated experiment difficult point
1）The realization of shaft bottom under-voltage value
Strata pressure is referred to as under-voltage value with the difference of shaft bottom drilling well liquid columnpressure, and under balance pressure drilling is bored with conventional overbalance
The difference of well is that this, therefore the simulated experiment of indoor under balance pressure drilling broken rock will provide experiment rock sample the outside of under-voltage value
Environment, it is desirable to test the Fluid pressure inside rock sample（Strata pressure）Higher than the Fluid pressure outside rock sample, simultaneously because under-voltage
The presence of value can also cause the high-pressure fluid in rock sample constantly to outside seepage flow, cause the internal fluid pressure reduction of experiment rock sample
Under-voltage value changes, therefore there is a need for being able to that experiment rock sample is continuously replenished energy and is at dynamic balance state.
2）The realization of rotatory sealing function
The simulated experiment of under balance pressure drilling broken rock needs to apply simulation drilling well liquid columnpressure and strata pressure to experiment rock sample,
The rotary simulation of drill bit its underground work situation is also realized simultaneously, it is therefore desirable to solve the rotation of experimental provision under condition of high voltage
Sealing problem.
2nd, existing indoor broken rock analogue experiment installation
Current major oil colleges and universities and scientific research institutions each have developed broken rock analogue experiment installation in multi-room, according to it
The function of realization is broadly divided into following two：
1）Monodentate press-in broken rock experimental provision under downhole condition
Such experimental provision can simulate horizontal crustal stress suffered by bottom rock, drilling well liquid columnpressure and ground lamination
Power, axial load is applied by simulation tooth or cutting tooth（Static pressure load or dynamic load）, measurement is in pressure at right angle effect lower tooth
The press-in rule and catalase feature of tooth or cutting tooth.Such experimental provision can simulate the true stress ring of bottom rock
Border, but the rotation broken rock and multiple tooth combined-breaking rock of tooth or cutting tooth, the working condition and reality of its drill teeth cannot be realized
Drilling process has larger difference.
2）Simulation drill bit drilling broken rock experimental provision
Such experimental provision can simulate horizontal crustal stress and the strata pressure suffered by bottom rock, using micro-dimension drill bit
Or simulation drill bit creeps on rock sample, analyzes in different bottom pressures, the pressure of the drill and rock-cracking mechanism and brill under speed conditions
Multiple tooth combined-breaking rock feature.Such experimental provision can simulate the practical structures feature and underground work situation of drill bit, but by
The rotation of drill bit in experimentation, it is impossible to solve the problems, such as the rotatory sealing in experimentation, therefore cannot be on experiment rock sample
Apply drilling well liquid columnpressure, the external force condition that it is applied has certain difference with the true stress characteristic of bottom rock,
The breaking feature of bottom rock cannot truly be reflected.
Real features due to drill bit in downhole crushed rock cannot be obtained, and indoor broken rock simulated experiment is to carry out broken rock machine
Reason and the effective means of Fracture law analysis.Rational interior broken rock simulated experiment should provide the true stress of Rock in Well
Environment, while also to meet the design feature and working condition of actual drill bit, and existing indoor broken rock analogue experiment installation by
In rotatory sealing cannot be solved the problems, such as, it is impossible to while meeting the requirement of experiment rock sample force environment and bit operation situation, nothing
Method carries out the lab simulation of under balance pressure drilling broken rock so that under balance pressure drilling rock breaking mechanism, bit type selection and optimization design
Theoretical research lacks necessary experiment support.
The content of the invention
It is an object of the invention to provide under balance pressure drilling broken rock analogue experiment installation, this under balance pressure drilling broken rock simulation is real
Experiment device is used to solve the problems, such as that the simulated experiment of current under balance pressure drilling broken rock cannot realize that another object of the present invention is to carry
The method of experiment is simulated for this under balance pressure drilling broken rock analogue experiment installation.
The technical solution adopted for the present invention to solve the technical problems is：This under balance pressure drilling broken rock analogue experiment installation
Including frame, rotary system, spraying-preventing system, autoclave, data acquisition logging system, autoclave is arranged in frame, autoclave
Top the active rotation assembly of spraying-preventing system is installed, packing unit is installed in active rotation assembly, spraying-preventing system by
Blowout prevention hydraulic control is formed by connecting by hydraulic line with active rotation assembly；The active rotation of packing unit is installed
Turn assembly and autoclave top closure is formed into drilling fluid hydraulic cavities, drilling rod is passed through from the middle of packing unit and extend into autoclave
In, drilling rod lower end connection drill bit, rotary system is installed on the top of frame, is connected with drilling rod by rotating disk；There is ring in autoclave
The horizontal load hydraulic cavities of shape, horizontal load hydraulic cavities are looped around outside core holding unit, core holding unit clamping rock core, ground lamination
Power hydraulic cavities are supported on below rock core, and horizontal load hydraulic cavities and strata pressure hydraulic cavities are respectively positioned on lifting supporting plate；Plunger
Upper end connection lifting supporting plate, the lower end of plunger connects the pressure of the drill simulation hydraulic cavities, and the pressure of the drill simulation hydraulic cavities are arranged on the base of frame
On；Displacement transducer is housed, rotary system and displacement transducer are respectively connecting to data acquisition logging system on plunger.
Drilling fluid hydraulic cavities are connected with the circulatory system in such scheme, and the circulatory system is by drilling pump, drilling fluid pot, drilling fluid
Flow registering instrument, drill pump pressure recorder and tap are formed by connecting by pipeline.
Drilling fluid hydraulic cavities are connected with drilling fluid hydraulic system in such scheme, and drilling fluid hydraulic system is by drilling fluid hydraulic pressure
Recorder, drilling fluid hydraulic booster container, drilling fluid hydraulic booster pump are connected and composed by pipeline.
Horizontal load hydraulic cavities connection horizontal load system in such scheme, horizontal load system is remembered by horizontal load pressure
Record instrument, horizontal load pressurized container, horizontal load booster pump are connected and composed by pipeline.
Strata pressure hydraulic cavities are connected with formation pressure system in such scheme, and formation pressure system is recorded by strata pressure
Instrument, strata pressure pressurized container, strata pressure booster pump are connected and composed by pipeline.
The pressure of the drill simulation hydraulic cavities connect the pressure of the drill simulation system in such scheme, and the pressure of the drill simulation system is by the pressure of the drill recorder, brill
Pressing mold is intended pressurized container, the pressure of the drill simulation booster pump and is connected and composed by pipeline.
Above-mentioned under balance pressure drilling broken rock analogue experiment installation is used for the method for carrying out under balance pressure drilling rock break-off process simulation：
The first step：Make rock core, it is desirable to which rock core is parallel smooth for cylinder, both ends of the surface；
Second step：Rock core is placed on the shelves pin of core holding unit, the run of steel of rotary system is adjusted, makes drill bit and rock
Intimate surface contact in the heart；
3rd step：Blowout prevention hydraulic control is opened, packing unit is expanded in active rotation assembly by hydraulic pressure,
Hold drilling rod tightly and realize sealing, hydraulic pressure is greater than the drilling fluid hydraulic pressure in experimentation；
4th step：Outer load is applied to rock core by drilling fluid hydraulic system, horizontal load system, formation pressure system, its
Middle drilling fluid hydraulic system and formation pressure system are pressurized to simulated formation pressure value, horizontal load system boost to dummy level
Crustal stress numerical value；Then immersion rock core 24 hours, makes rock core inside fully saturation fluid reach simulated formation pressure value；
5th step：The pressure of the drill is applied to rock core by the pressure of the drill simulation system, then the rapid pressure for reducing drilling fluid hydraulic system
Power, reaches the requirement of under-voltage value, and the external environment of under-voltage value is formed in core surface；
6th step：Opening drilling pump makes fluid circulation, while rotary system applies moment of torsion to drilling rod, in the effect of frictional force
Lower drilling rod drives packing unit to be rotated in active rotation assembly, the pressure of the drill, rotating speed, moment of torsion, drilling in record drilling process
Depth, drill pump pressure and mud flow rate, until experiment terminates.
The invention has the advantages that：
1st, the present invention can apply drilling fluid hydraulic pressure, horizontal crustal stress and strata pressure, more real simulation for rock core
The actual loading feature of bottom rock；
2nd, the present invention applies constant strata pressure and drilling fluid hydraulic pressure by rock core bottom and top, meets infinity
Special process from formation underbalanced drilling formation fluid to continuous seepage flow in well；
3rd, the present invention solves the problems, such as under balance pressure drilling drilling process mesohigh rotatory sealing, really reflects and owes flat
Weigh well drilling well bottom rock breaking feature and rule, be under balance pressure drilling rock breaking mechanism research, bottom rock drillability evaluate and
Rate of penetration prediction provides necessary laboratory experiment method and means；
4th, the present invention really simulates the moving situation of bit broken rock under under balance pressure drilling downhole condition, to owe flat
Weighing apparatus drilling well target drill type selecting and drill bit design provide laboratory experiment support.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
In figure：1-frame；2-rotary system；3-kelly bar；4-rotating disk；5-round drill rod；6-active rotation
Assembly；7-packing unit；8-blowout prevention hydraulic control；9-tap；10-mud flow rate recorder；11-drilling well
Pump pressure recorder；12-drilling pump；13-drilling fluid pot；14-autoclave；15-drilling fluid hydraulic cavities；16-horizontal load
Hydraulic cavities；17-core holding unit；18-rock core；19-simulation drill bit；20-data acquisition logging system；21-drilling fluid liquid
Pressure recorder；22-drilling fluid hydraulic booster container；23-drilling fluid hydraulic booster pump；25-horizontal load manograph；
26-horizontal load pressurized container；27-horizontal load booster pump；29-strata pressure recorder；30-strata pressure is pressurized
Container；31-strata pressure booster pump；33-strata pressure hydraulic cavities；34-plunger；35-displacement transducer；36-the pressure of the drill
Simulation hydraulic cavities；37-the pressure of the drill recorder；38-the pressure of the drill simulates pressurized container；39-the pressure of the drill simulates booster pump.
Specific embodiment
The present invention is further illustrated below：
As shown in figure 1, this under balance pressure drilling broken rock analogue experiment installation include frame 1, rotary system 2, spraying-preventing system,
The circulatory system, autoclave 14, drilling fluid hydraulic system, horizontal load system, formation pressure system, the pressure of the drill simulation system, data
Acquisition and recording system 20, rotary system is installed on the top of frame 1, is connected with kelly bar 3 by rotating disk 4, and the bottom of kelly bar 3 connects
Round drill rod 5 and drill bit 19 are connect, rotary system drives rotating disk 4, kelly bar 3, round drill rod 5 and drill bit 19 to rotate during experiment.It is high
Pressure kettle 14 is arranged in frame 1, and the active rotation assembly 6 of spraying-preventing system is installed on the top of autoclave 14, and active rotation is total
Packing unit 7 is installed, spraying-preventing system passes through hydraulic line and active rotation assembly 6 by blowout prevention hydraulic control 8 in into 6
It is formed by connecting, round drill rod 5, the band of round drill rod 5 in the presence of frictional force are held in the expansion of packing unit 7 tightly when spraying-preventing system works
The rotation in active rotation assembly 6 of dynamic sealing glue core 7, so as to realize rotatory sealing；The active rotation of packing unit is installed
Turn assembly 6 and the top closure of autoclave 14 is formed into drilling fluid hydraulic cavities 15, round drill rod 5 is passed through and stretched from the middle of packing unit 7
Enter in autoclave 14, the lower end of round drill rod 5 connection drill bit 19；There are the horizontal load hydraulic cavities 16 of annular, water in autoclave 14
Flat load hydraulic cavities 16 are looped around outside core holding unit 17, and the clamping rock core 18 of core holding unit 17, rock core 18 is placed in rock core clamping
On the shelves pin of device 17, experiment starts the upper surface that preceding drill bit 19 is close to rock core 18, and strata pressure hydraulic cavities 33 are supported on rock core
Below 18, horizontal load hydraulic cavities 16 and strata pressure hydraulic cavities 33 are respectively positioned on lifting supporting plate；The upper end connection of plunger 34 rises
Drop supporting plate, the lower end of plunger 34 connects the pressure of the drill simulation hydraulic cavities 36, and the pressure of the drill simulation hydraulic cavities 36 are arranged on the base of frame 1；
Displacement transducer 35 is housed on plunger 34, displacement transducer 35 is housed on plunger 34 and is used for measuring drilling depth, the He of rotary system 2
Displacement transducer 35 is respectively connecting to data acquisition logging system 20.Plunger 34 is subject to the upward thrust of the pressure of the drill simulation hydraulic cavities 36
Afterwards, it is up, and promote horizontal load hydraulic cavities 16, strata pressure hydraulic cavities 33 and rock core 18 simultaneously up, drill bit 19 is to up
Rock core 18 carry out rotation broken rock.
Drilling fluid hydraulic cavities 15 are connected with the circulatory system, and the circulatory system is by drilling pump 12, drilling fluid pot 13, mud flow rate
Recorder 10, drill pump pressure recorder 11 and tap 9 are formed by connecting by pipeline.Drilling pump 12 passes through pipeline and drilling fluid
Pond 13, mud flow rate recorder 10, drill pump pressure recorder 11 and tap 9 are connected, in experimentation drilling pump 12 from
Drilling fluid is extracted in drilling fluid pot 13 and enters drilling rod through drill pump pressure recorder 11, mud flow rate recorder 10 and tap
Endoporus, sprays from drill bit 19, is then flowed into drilling fluid pot 13 from autoclave 14, so as to simulate the drilling well of under balance pressure drilling
Liquid cyclic process.
Drilling fluid hydraulic cavities 15 are connected with drilling fluid hydraulic system, and drilling fluid hydraulic system is by drilling fluid hydraulic pressure recorder
21st, drilling fluid hydraulic booster container 22, drilling fluid hydraulic booster pump 23 are connected and composed by pipeline, are recorded for real-time adjustment and bored
Simulation drilling well liquid columnpressure in well liquid hydraulic cavities 15.
Horizontal load hydraulic cavities 16 connect horizontal load system, for device provides dummy level crustal stress.Horizontal load system
System is connected and composed by horizontal load manograph 25, horizontal load pressurized container 26, horizontal load booster pump 27 by pipeline.
Horizontal load hydraulic cavities 16 provide horizontal crustal stress to core holding unit 17, and horizontal load system is used for real-time adjustment recording level
Dummy level crustal stress in load hydraulic cavities 16.
Strata pressure hydraulic cavities 33 are connected with formation pressure system, for device provides simulated formation pressure.Strata pressure system
System is connected and composed by strata pressure recorder 29, strata pressure pressurized container 30, strata pressure booster pump 31 by pipeline, is used for
Simulated formation pressure in real-time adjustment record strata pressure hydraulic cavities 33.
The pressure of the drill simulation connection the pressure of the drill simulation system of hydraulic cavities 36, for device provides simulation the pressure of the drill.The pressure of the drill simulation system is by boring
Pressure recorder 37, the pressure of the drill simulation pressurized container 38, the pressure of the drill simulation booster pump 39 is connected and composed by pipeline, drilling fluid hydraulic system
24 are connected to drilling fluid hydraulic cavities 15 for device provides simulation drilling well liquid columnpressure, and the pressure of the drill simulated solution is recorded for real-time adjustment
Simulation the pressure of the drill in pressure chamber 36.
Data acquisition logging system 20 install in a computer, by pipeline respectively with rotary system 2 and displacement transducer
35 connections, for real time record display rotating speed, moment of torsion and drilling depth.
The method that above-mentioned under balance pressure drilling broken rock analogue experiment installation is used for the simulation of under balance pressure drilling rock break-off process：
The first step：Specify the rock core 18 of making standard according to instrument, it is desirable to which rock core 18 is cylinder, both ends of the surface directional light
It is sliding；
Second step：Rock core is placed on the shelves pin of core holding unit 17, the run of steel of rotary system 2 is adjusted, makes drill bit
19 are in close contact with rock core upper surface；
3rd step：Blowout prevention hydraulic control 8 is opened, makes packing unit 7 swollen in active rotation assembly 6 by hydraulic pressure
It is swollen, hold drilling rod tightly and realize sealing.Hydraulic pressure is greater than the drilling fluid hydraulic pressure in experimentation；
4th step：Outer load is applied to rock core by drilling fluid hydraulic system, horizontal load system, formation pressure system, its
Middle drilling fluid hydraulic system and formation pressure system are pressurized to simulated formation pressure value, horizontal load system boost to dummy level
Crustal stress numerical value；Then soak 24 hours, rock core inside fully saturation fluid is reached simulated formation pressure value；
5th step：The pressure of the drill is applied to rock core by the pressure of the drill simulation system, then the rapid pressure for reducing drilling fluid hydraulic system
Power, reaches the requirement of under-voltage value, and the external environment of under-voltage value is formed in core surface；
6th step：Opening drilling pump makes fluid circulation, while rotary system 2 applies moment of torsion to drilling rod, in the work of frictional force
Packing unit 7 is driven to rotate in the active rotation assembly 6 with lower drilling rod, the pressure of the drill, rotating speed, moment of torsion in record drilling process,
Drilling depth, drill pump pressure and mud flow rate, until experiment terminates.
Claims (7)
1. a kind of under balance pressure drilling broken rock analogue experiment installation, it is characterised in that：This under balance pressure drilling broken rock simulated experiment dress
Put including frame（1）, rotary system（2）, spraying-preventing system, autoclave（14）, data acquisition logging system（20）, autoclave（14）
It is arranged on frame（1）In, autoclave（14）Top install spraying-preventing system active rotation assembly（6）, active rotation is always
Into（6）Packing unit is inside installed（7）, spraying-preventing system is by blowout prevention hydraulic control（8）By hydraulic line and active rotation
Turn assembly（6）It is formed by connecting；The active rotation assembly of packing unit is installed（6）By autoclave（14）Top closure is formed bores
Well liquid hydraulic cavities（15）, drilling rod is from packing unit（7）Centre passes through and extend into autoclave（14）In, drilling rod lower end connection drill bit
（19）, rotary system（2）It is installed on frame（1）Top, by rotating disk（4）It is connected with drilling rod；Autoclave（14）Inside there is annular
Horizontal load hydraulic cavities（16）, horizontal load hydraulic cavities（16）It is looped around core holding unit（17）Outward, core holding unit（17）
Clamping rock core（18）, strata pressure hydraulic cavities（33）It is supported on rock core（18）Below, horizontal load hydraulic cavities（16）It is laminated with ground
Power hydraulic cavities（33）It is respectively positioned on lifting supporting plate；Plunger（34）Upper end connection lifting supporting plate, plunger（34）Lower end connection bore
Pressing mold intends hydraulic cavities（36）, the pressure of the drill simulation hydraulic cavities（36）It is arranged on frame（1）Base on；Plunger（34）On equipped with displacement pass
Sensor（35）, rotary system（2）And displacement transducer（35）It is respectively connecting to data acquisition logging system（20）.
2. under balance pressure drilling broken rock analogue experiment installation according to claim 1, it is characterised in that：Described drilling fluid liquid
Pressure chamber（15）It is connected with the circulatory system, the circulatory system is by drilling pump（12）, drilling fluid pot（13）, mud flow rate recorder
（10）, drill pump pressure recorder（11）And tap（9）It is formed by connecting by pipeline.
3. under balance pressure drilling broken rock analogue experiment installation according to claim 2, it is characterised in that：Described drilling fluid liquid
Pressure chamber（15）It is connected with drilling fluid hydraulic system, drilling fluid hydraulic system is by drilling fluid hydraulic pressure recorder（21）, drilling fluid hydraulic pressure
Pressurized container（22）, drilling fluid hydraulic booster pump（23）Connected and composed by pipeline.
4. under balance pressure drilling broken rock analogue experiment installation according to claim 3, it is characterised in that：Described horizontal load
Hydraulic cavities（16）Connection horizontal load system, horizontal load system is by horizontal load manograph（25）, horizontal load supercharging
Container（26）, horizontal load booster pump（27）Connected and composed by pipeline.
5. under balance pressure drilling broken rock analogue experiment installation according to claim 4, it is characterised in that：Described strata pressure
Hydraulic cavities（33）It is connected with formation pressure system, formation pressure system is by strata pressure recorder（29）, strata pressure supercharging hold
Device（30）, strata pressure booster pump（31）Connected and composed by pipeline.
6. under balance pressure drilling broken rock analogue experiment installation according to claim 5, it is characterised in that：Described the pressure of the drill simulation
Hydraulic cavities（36）Connection the pressure of the drill simulation system, the pressure of the drill simulation system is by the pressure of the drill recorder（37）, the pressure of the drill simulation pressurized container（38）、
The pressure of the drill simulates booster pump（39）Connected and composed by pipeline.
7. the under balance pressure drilling broken rock analogue experiment installation described in a kind of claim 6 is used to carry out under balance pressure drilling rock break-off process
The method of simulation, it is characterised in that：
The first step：Make rock core（18）, it is desirable to rock core is parallel smooth for cylinder, both ends of the surface；
Second step：By rock core（18）It is placed in core holding unit（17）Shelves pin on, adjust rotary system（2）Run of steel, make
Drill bit（19）It is in close contact with rock core upper surface；
3rd step：Open blowout prevention hydraulic control（8）, packing unit is made by hydraulic pressure（7）In active rotation assembly（6）It is interior
Expansion, holds drilling rod tightly and realizes sealing, and hydraulic pressure is greater than the drilling fluid hydraulic pressure in experimentation；
4th step：Outer load is applied to rock core by drilling fluid hydraulic system, horizontal load system, formation pressure system, wherein boring
Well liquid hydraulic system and formation pressure system are pressurized to simulated formation pressure value, and horizontal load system boost to simulation water level land should
Power numerical value；Then immersion rock core 24 hours, makes rock core inside fully saturation fluid reach simulated formation pressure value；
5th step：The pressure of the drill is applied to rock core by the pressure of the drill simulation system, then the rapid pressure for reducing drilling fluid hydraulic system, makes
Its requirement for reaching under-voltage value, in rock core（18）Surface forms the external environment of under-voltage value；
6th step：Opening drilling pump makes fluid circulation, while rotary system（2）Moment of torsion is applied to drilling rod, in the effect of frictional force
Lower drilling rod drives packing unit（7）In active rotation assembly（6）Interior rotation, the pressure of the drill, rotating speed, torsion in record drilling process
Square, drilling depth, drill pump pressure and mud flow rate, until experiment terminates.
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| CN201510063029.9A CN104763407B (en) | 2015-02-08 | 2015-02-08 | Under balance pressure drilling broken rock analogue experiment installation and its analogue experiment method |
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| CN111749673A (en) * | 2019-03-26 | 2020-10-09 | 中国石油化工股份有限公司 | Drilling simulation test system |
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| CN100353027C (en) * | 2003-10-31 | 2007-12-05 | 中国石油化工股份有限公司 | Under balance drilling bottom pressure automatic control system and method |
| CN201496014U (en) * | 2009-01-08 | 2010-06-02 | 西南石油大学 | Downhole safety monitoring system for underbalance drilling compound logging |
| CN102418509B (en) * | 2010-09-28 | 2014-07-09 | 中国石油化工集团公司 | Indoor test system and method for managed pressure drilling technology |
| CN102011582B (en) * | 2010-11-25 | 2013-05-08 | 中国石油化工股份有限公司 | Apparatus for testing rock drillability under stratum condition |
| CN202467817U (en) * | 2012-03-15 | 2012-10-03 | 东北石油大学 | Indoor simulation device for rock drillability on air drilling condition |
| CN203531828U (en) * | 2013-11-22 | 2014-04-09 | 中国石油天然气集团公司 | Oil-pressure shrinkage active compensation type rubber core of active sealing type rotary blowout preventer |
| CN103806907B (en) * | 2014-01-26 | 2016-03-02 | 西南石油大学 | A kind of deep-well, ultra-deep well drilling drillability of rock testing arrangement and method of testing |
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