CN102778411B - Drilling fluid solid phase grinding simulation experiment method and device - Google Patents
Drilling fluid solid phase grinding simulation experiment method and device Download PDFInfo
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- CN102778411B CN102778411B CN201110123870.4A CN201110123870A CN102778411B CN 102778411 B CN102778411 B CN 102778411B CN 201110123870 A CN201110123870 A CN 201110123870A CN 102778411 B CN102778411 B CN 102778411B
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Abstract
Belonging to the field of drilling fluid performance analysis in petroleum exploration, the invention provides a drilling fluid solid phase grinding simulation experiment method and a device. According to the method provided in the invention, a grinding rod is placed in an ageing kettle, the relative movement of the ageing kettle and the grinding rod under a rolling condition is utilized to simulate the effects of a drill rod and a casing pipe or a well wall, thus measuring the drilling fluid performance change caused by a solid phase particle size change under a grinding condition. The device provided in the invention comprises a high temperature roller furnace, the ageing kettle and the grinding rod. During operation, the grinding rod is placed in the ageing kettle. By means of the method and device provided in the invention, the influence of downhole grinding, collision, and extrusion conditions on drilling fluid performance can be simulated. By adjusting the rotating speed of the roller furnace, different well drilling speeds can be simulated. The grinding rod is placed inside the ageing kettle for simulating the grinding and collision effects between the drill rod and the casing pipe as well as the effects between the drill rod and the well wall under a rolling action. The temperature and the time can be adjusted freely according to the on-site situation.
Description
Technical field
The invention belongs to drilling fluid analysis method field in petroleum prospecting, being specifically related to a kind of method and device of mud solid phase lap draft experiment, for simulating the change of drilling fluid performance under grinding condition.
Background technology
Drilling fluid is dispersed in by multiple treating agent the liquid system formed in water, oil.Usually need to add some solid phase particles if weighting agent, light-weight additive are to regulate the density of drilling fluid.The particle diameter of solid phase particles has a significant impact the rheological of drilling fluid, dehydration, and in circulation of drilling fluid process, due to collision, the extruding of drilling rod and the borehole wall, the particle diameter of solid phase has the trend diminished, thus causes the change of drilling fluid viscosity, dehydration and density.Especially, in the higher high density drilling fluid of solid load and low density drilling fluid, the change of this property of drilling fluid caused due to solid phase change of size is very important.
In high density drilling fluid, usually adopt barite or Iron Ore Powder as weighting agent, such as, use barite weighted drilling fluid density to 2.2g/cm
3time, need 100ml drilling fluid base slurry (density is about 1.05 g/cm
3) in add barite 230g, so high solid phase, when particle diameter diminishes solid phase particles in case of milling, increase the water suction that causes the viscosity of drilling fluid can be made sharply to raise because specific grain surface amass, performance depreciation.
In low density drilling fluid, because light-weight additive mostly is hollow glass micropearl or porous particle, shell is more crisp, abrasive action lower casing is broken, not only lose and fall density effect, and because the density of housing own is comparatively large, the density of weighted drilling fluid on the contrary after fragmentation, performance and the density of therefore assessing drilling fluid under abrasive action are significant.The product glass microballoon HGS10000 examining under a microscope 3M company the most frequently used on oil field grinds situation, and result shows, glass microballoon have gentle hands is almost completely broken after gently grinding 10 times, and its anti-pressure ability reaches 70MPa.Therefore can infer, in drilling fluid, the breakage of HGS is scarcely because anti-pressure ability is inadequate, but because its fragility is strong, under grinding and high speed shear caused by fragmentation.
Therefore in high solid phase situation, it is necessary for grinding the evaluation of property of drilling fluid variable effect, but also unspecial test grinding affects the instrument of aspect on property of drilling fluid both at home and abroad at present.Existing beveller mainly tests simple solid phase broken situation under certain condition, such as test hollow glass micro-ball wearing quality time, at ambient temperature with pressure testing machine test powder parting pressure, test its wearing quality etc. with beveller.The grinding situation mainly between solid and solid of test, this grinding belongs to rigid grinding, great efforts, and lubricity between solid, surface flatness have a lot of relations.And in drilling fluid, grinding is carried out in the liquid phase, in paper examines circulation of drilling fluid process, due to the high velocity impact between drilling rod and the borehole wall, sleeve pipe, extruding and rubbing action, thus the impact causing solid phase particles change of size and then property of drilling fluid is produced.It and the dosage of solid phase, the viscosity, rotating speed, temperature and pressure etc. of drilling fluid have relation, and simple solid-phase grinding numeral is nonsensical.The down-hole abrasive action in actual well drilled process is not all considered in the evaluation of current property of drilling fluid, in the low density drilling fluid of the high density drilling fluid that especially solid load is higher and interpolation density light-weight additive, existing method can not reflect the actual change of drilling fluid, and existing solid-phase grinding evaluating apparatus is not suitable for drilling fluid evaluation yet.
By patent retrieval and literature query, do not find to be applicable to solid-phase grinding simulation experiment device and method in drilling fluid.
Summary of the invention
The object of the invention is to solve the difficult problem existed in above-mentioned prior art, a kind of method and device of mud solid phase lap draft experiment is provided, be used for simulating and analyze the change that drilling fluid occurs under the abrasive action of down-hole.
The present invention is achieved by the following technical solutions:
A kind of method of mud solid phase lap draft experiment, described method inserts grinding rod in aging reactor, utilize the relative motion under rolling condition between aging reactor and grinding rod to simulate the effect between drilling rod and sleeve pipe or the borehole wall, thus measure the performance change that drilling fluid causes due to the change of solid phase particle diameter under grinding condition.
Said method comprising the steps of:
(1) grinding rod is placed in aging reactor, pours drilling fluid into and make the dipped grinding rod of liquid level, build gland bonnet, tighten kettle cover, and tighten hold-down bolt;
(2) aging reactor is put on the cylinder of high temp roller furnace, power-on, set temperature, time and rotating speed, start to roll;
(3) aging reactor starts to roll under cylinder effect, and grinding rod is positioned at below aging reactor under gravity all the time and keep geo-stationary, just relative motion is there is between grinding rod and aging reactor, the collision existed between grinding rod and aging reactor in rolling process, grinding, squeezing action, be used for simulating the effect between drilling rod and sleeve pipe in drilling process or the borehole wall by these;
(4) after having simulated, by the performance change of drilling fluid before and after test grinding, in conjunction with utilizing microscope, scanning electron microscope, transmission electron microscope characterization method, investigate abrasive action on the impact of solid phase material particle diameter, form etc. in drilling fluid, and then appraisal drilling liquid density controlling material in drilling process to the true effect of drilling fluid density.
Present invention also offers a kind of mud solid phase grinding analogue experiment installation for realizing said method, it comprises high temp roller furnace, aging reactor and grinding rod.
In high temp roller furnace, be provided with the adjustable cylinder of at least one pair of rotating speed, described cylinder is installed in parallel in high temp roller furnace.
Aging reactor is refractory metal barrel-like structure, and its inner lining is with abrasion-proof corrosion-proof corrosion material.
During use, grinding rod is placed in aging reactor, and aging reactor is placed on the cylinder in high temp roller furnace, aging reactor placement parallel with cylinder, and its weight is born together by two cylinders, two cylinder rotating in same directions, drives aging reactor to rotate.
In described high temp roller furnace, cylinder provides power by variable-frequency motor.
Compared with prior art, the invention has the beneficial effects as follows: utilize the present invention, can grinding under simulation well, collision, extruding condition is on the impact of property of drilling fluid.Different bit speed can be simulated by the rotating speed adjusting roller furnace.Grinding rod is placed in aging reactor inside, tumble action Imitating drilling rod and sleeve pipe and the grinding between drilling rod and the borehole wall, collision effect.Temperature and time freely can adjust according to field condition.
Accompanying drawing explanation
Fig. 1 is the sectional view of the aging reactor that the inventive method uses.
Fig. 2 is the schematic diagram of aging reactor and cylinder position relation under duty in the inventive method.
Fig. 3 be the inventive method use the structural representation of high temp roller furnace.
Fig. 4 is the schematic diagram of the grinding rod that the inventive method uses.
Wherein, 1 is trim ring, and 2 is screw, and 3 is kettle cover, and 4 is vent valve, and 5 is " O " RunddichtringO, 6 is hold-down bolt, and 7 is support ring, and 8 is gland bonnet, and 9 is sealing ring, and 10 is kettle, and 11 is high temp roller furnace, 12 is cylinder, and 13 is support, and 14 is aging reactor, and 15 is fire door, and 16 is O-ring seal.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
A kind of method of mud solid phase lap draft experiment, described method is by the performance change such as density, rheological, dehydration of drilling fluid before and after test grinding, in conjunction with utilizing the characterization methods such as microscope, scanning electron microscope, transmission electron microscope, investigate abrasive action to the impact of solid phase material particle diameter, form etc. in drilling fluid, and then evaluation regulates material in drilling process to the true effect of mud density to drilling fluid density.
The step of the inventive method is as follows: be placed in by grinding rod in aging reactor, pours drilling fluid into and makes the dipped grinding rod of liquid level (now aging reactor is in vertical state).Build gland bonnet, tighten kettle cover, and tighten hold-down bolt.Aging reactor is put into (now aging reactor is in horizontality) on the cylinder of roller furnace, power-on, set temperature and time and rotating speed, start to roll.Aging reactor starts to roll under cylinder effect, and grinding rod is positioned at all the time under gravity below aging reactor and keeps geo-stationary, (aging reactor directly contacts cylinder just to there is relative motion between grinding rod and aging reactor, after cylinder rotates, just drive aging reactor to rotate, and grinding rod is placed in cylinder, because Action of Gravity Field grinding rod is in lower position in cylinder always, when aging reactor rolls, grinding rod meeting and aging reactor have some collision and relative motion, but grinding rod is always below aging reactor).The diameter of the grinding rod of different size, weight are different, and size, drilling speed etc. mainly according to on-the-spot friction force during use determine used specification.There is collision, grinding, squeezing action between grinding rod and aging reactor in rolling process, be used for the effect of drilling rod and sleeve pipe (or borehole wall) in simulation drilling process by these.
The present invention also comprises a kind of mud solid phase grinding analogue experiment installation, and it comprises high temp roller furnace 11, aging reactor 14 and the grinding rod that can be heated to 200 DEG C.
As shown in Figure 3, in high temp roller furnace 11, be provided with the adjustable cylinder 12 of at least one pair of rotating speed, described cylinder 12 is installed in parallel in high temp roller furnace 11.
Aging reactor 14 is refractory metal (as chromium 316) barrel-like structure processed, and its inner lining is with abrasion-proof corrosion-proof corrosion material.
During use, as shown in Figure 2, during use, grinding rod is placed in aging reactor 14, aging reactor 14 is placed on the cylinder 12 in high temp roller furnace 11, aging reactor 14 placement parallel with cylinder 12, and its weight is born together by two cylinders 12, two cylinder 12 rotating in same directions, drive aging reactor 14 to rotate.
Cylinder 12 in described temperature roller furnace provides power by variable-frequency motor, can simulate different bit speed, evaluates the impact of different grinding rate on drilling fluid.
The aging reactor 14 used in the present invention, compared with aging reactor of the prior art, structurally as broad as longly (as shown in Figure 1, comprises trim ring 1, screw 2, kettle cover 3, vent valve 4, " O " RunddichtringO 5, hold-down bolt 6, support ring 7, gland bonnet 8, sealing ring 9, kettle 10.), just improve dimensionally, kettle 10 is than the lengthening of common aging reactor, the reason lengthened is: will account for volume after placed grinding rod, the drilling well liquid measure put into will reduce, and in order to make the drilling well liquid measure put into maintain commercial weight, therefore will lengthen kettle.
The metal grinding rod of the different size of abrasive action has been put into (as shown in Figure 4 in aging reactor 14 inside, a grinding rod is put in an aging reactor inside in use, but the weight of grinding rod will be determined according to strata condition, select suitable specification), utilize the collision of grinding rod and aging reactor, extrude the effect of simulating drilling rod and sleeve pipe (or borehole wall), kettle cover 3 is provided with hold-down bolt 6, is pressurize in kettle by bolt.
Invention has been following innovation:
(1) in aging reactor, add grinding rod, collision in simulation drilling process between drilling rod and sleeve pipe (borehole wall), friction, squeezing action are (because aging reactor is placed on cylinder, aging reactor will roll when the drum turns, but grinding rod is placed on aging reactor inside, when aging reactor rotates it just and aging reactor ceaselessly collide, but it can not rotate), make evaluation result and scene more close;
(2) roller furnace rotating speed is adjustable, can simulate different rotating speeds in drilling process and drilling fluid be ground to the impact of result;
(3) aging reactor lengthens than common aging reactor is in order to avoid owing to adding grinding rod, and the drilling well liquid measure added is reduced;
(4) grinding rod is placed in aging reactor, and aging reactor is in rolling process, and drilling fluid stands grinding rod while aging reactor rolls and aging reactor collides the effect produced.
In scientific experiment, demonstrate high density drilling fluid and the low density drilling fluid great changes that performance occurs under abrasive action with method and apparatus of the present invention, concrete data are as follows:
Experiment 1:
Configuration base slurry: 4% bentonitic clay+0.25%CMC, measure the performance change of its rolling drilling fluid after 16 hours under grinding and non-ground condition respectively according to " SY/T5621-93 test procedure for drilling fluids ", experimental result is as shown in table 1,
Table 1
As known from Table 1, to typical well liquid (solid load is lower), grind the impact of drilling fluid very little, negligible.
Experiment 2:
Configure 400 milliliter of 0.2% xanthan gum solution, add the glass microballoon of 20 grams of HGS8000(3M companies, resistance to compression is slightly 56MPa), recording density is 0.93g/cm
3.Measure the performance change of its rolling drilling fluid after 16 hours under grinding and non-ground condition respectively according to " SY/T5621-93 test procedure for drilling fluids ", experimental result is as shown in table 2,
| Slurry | Density (g/cm 3） |
| Roll 16 hours | 0.935 |
| Roll 16 hours under grinding condition | 1.05 |
Table 2
From table 2, under simple rolling condition, the density of low density drilling fluid is by 0.93 g/cm
3change to 0.935 g/cm
3, amplitude of variation is also little, but deposits in case in grinding, and drilling fluid density is by 0.93 g/cm
3change to 1.05 g/cm
3, glass microballoon has lost and has fallen density capability, becomes weighting agent, similar to data during onsite application.
Experiment 3:
Configure a drilling fluid system 400 milliliters, base pulp density is 1.05 g/cm
3, add 964 grams, barite (order number is 400 orders), recording the density after increasing the weight of is 2.2 g/cm
3, measure the performance change of its rolling drilling fluid after 16 hours under grinding and non-ground condition respectively according to " SY/T5621-93 test procedure for drilling fluids ", experimental result is as shown in table 3,
Table 3
As shown in Table 3, under simple rolling condition, the performance change of high density drilling fluid is very little, but under grinding condition, because barite is levigate, causes the viscosity of drilling fluid obviously to rise.
From above three experiments, concerning high density and low density drilling fluid, grind the performance impact of drilling fluid very large, and this impact can not be reflected with conventional method and apparatus.
Technique scheme is one embodiment of the present invention, for those skilled in the art, on the basis that the invention discloses application process and principle, be easy to make various types of improvement or distortion, and the method be not limited only to described by the above-mentioned embodiment of the present invention, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (3)
1. the method for a mud solid phase lap draft experiment, it is characterized in that: described method inserts grinding rod in aging reactor, utilize the relative motion under rolling condition between aging reactor and grinding rod to simulate the effect between drilling rod and sleeve pipe or the borehole wall, thus measure the performance change that drilling fluid causes due to the change of solid phase particle diameter under grinding condition;
Said method comprising the steps of:
(1) grinding rod is placed in aging reactor, pours drilling fluid into and make the dipped grinding rod of liquid level, build gland bonnet, tighten kettle cover, and tighten hold-down bolt;
(2) aging reactor is put on the cylinder of high temp roller furnace, power-on, set temperature, time and rotating speed, start to roll;
(3) aging reactor starts to roll under cylinder effect, and grinding rod is positioned at below aging reactor under gravity all the time and keep geo-stationary, just relative motion is there is between grinding rod and aging reactor, the collision existed between grinding rod and aging reactor in rolling process, grinding, squeezing action, be used for simulating the effect between drilling rod and sleeve pipe in drilling process or the borehole wall by these;
(4) after having simulated, by the performance change of drilling fluid before and after test grinding, in conjunction with utilizing microscope, scanning electron microscope, transmission electron microscope characterization method, investigate abrasive action on the impact of solid phase material particle diameter, form etc. in drilling fluid, and then appraisal drilling liquid density controlling material in drilling process to the true effect of drilling fluid density.
2. the method for mud solid phase lap draft experiment according to claim 1, is characterized in that:
In high temp roller furnace, be provided with the adjustable cylinder of at least one pair of rotating speed, described cylinder is installed in parallel in high temp roller furnace;
Aging reactor is refractory metal barrel-like structure, and its inner lining is with abrasion-proof corrosion-proof corrosion material;
During use, grinding rod is placed in aging reactor, and aging reactor is placed on the cylinder in high temp roller furnace, aging reactor placement parallel with cylinder, and its weight is born together by two cylinders, two cylinder rotating in same directions, drives aging reactor to rotate.
3. the method for mud solid phase lap draft experiment according to claim 2, is characterized in that: the cylinder in described temperature roller furnace provides power by variable-frequency motor.
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| CN201110123870.4A CN102778411B (en) | 2011-05-13 | 2011-05-13 | Drilling fluid solid phase grinding simulation experiment method and device |
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| CN101890387A (en) * | 2009-05-20 | 2010-11-24 | 河南理工大学 | Roller grinder |
| CN201720096U (en) * | 2010-07-16 | 2011-01-26 | 江阴市东发机械设备制造有限公司 | Rod mill |
| CN201748802U (en) * | 2010-05-24 | 2011-02-16 | 青岛怿泽机电科技有限公司 | High-temperature roller heating device |
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2011
- 2011-05-13 CN CN201110123870.4A patent/CN102778411B/en active Active
Patent Citations (4)
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| US5450763A (en) * | 1992-07-02 | 1995-09-19 | Masson; Guy | Device for collecting samples of a liquid in a tank for in a chemical reaction vessel |
| CN101890387A (en) * | 2009-05-20 | 2010-11-24 | 河南理工大学 | Roller grinder |
| CN201748802U (en) * | 2010-05-24 | 2011-02-16 | 青岛怿泽机电科技有限公司 | High-temperature roller heating device |
| CN201720096U (en) * | 2010-07-16 | 2011-01-26 | 江阴市东发机械设备制造有限公司 | Rod mill |
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