CN104897858A - System for simulating underground dynamic circulation of drilling fluid - Google Patents
System for simulating underground dynamic circulation of drilling fluid Download PDFInfo
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- CN104897858A CN104897858A CN201510338702.5A CN201510338702A CN104897858A CN 104897858 A CN104897858 A CN 104897858A CN 201510338702 A CN201510338702 A CN 201510338702A CN 104897858 A CN104897858 A CN 104897858A
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- drilling fluid
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- direct current
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Abstract
The invention discloses a system for simulating underground dynamic circulation of a drilling fluid. The system comprises a direct-current motor, a direct-current speed regulator, a magnetic force transmission system and a reaction kettle, wherein a rotation speed sensor is mounted on a rotary shaft of the direct-current motor; the rotation speed sensor and the direct-current motor are connected with the direct-current speed regulator through data lines respectively; the magnetic force transmission system comprises an inner rotor and an outer rotor, and the outer rotor is connected with the direct-current motor; the reaction kettle is mounted in the middle of the outer rotor, the inner rotor is mounted in the reaction kettle and connected with a rotary barrel through a connection shaft, the inner wall of the rotary barrel is fixedly connected with spiral impellers, a hole is formed in the bottom of the rotary barrel, and a rock core holding unit is further mounted on the wall of the reaction kettle. The system is high in automation degree, can simulate the underground circulation state of the drilling fluid truly and overcomes the defect that convention equipment can only simulate a single flowing state of the drilling fluid.
Description
Technical field
The present invention relates to oil gas field reservoir protection experiment field, in particular, relate to a kind of drilling fluid down-hole dynamic circulation simulation system, this system energy real simulation drilling fluid, in down-hole flow state, provides the emulation platform that indoor reservoir protection is tested.
Background technology
In the experiment of oil gas field reservoir protection, usually need in the impact of desk research drilling fluid on oil and gas reservoir.And study the impact of drilling fluid on oil and gas reservoir, except considering the viscosity of fluid self, chemical group is graded outside the high temperature and high pressure environment of characteristic and corresponding reservoir, also needs the hydraulic performance considering fluid.The mode of motion of drilling fluid in down-hole is compound motion, the flowing of this compound by with the flowing of borehole wall direction level with rotated the rotational flow vertical with borehole wall direction caused by drilling tool and form.In order to study the impact of drilling fluid on oil and gas reservoir, researchist develops large measuring appratus to simulate the hydraulic characteristic of drilling fluid in down-hole, but these equipment often can only simulate separately the one in these two kinds of flow states, drilling fluid flow state in the wellbore cannot be reacted really, the data causing these instruments to record are more unilateral, cannot conform to actual conditions.Therefore develop a kind of can the emulator of real simulation drilling fluid flow state in the wellbore, contribute to the mechanism of the more deep research drilling fluid damage reservoir of researchist, find harmless to reservoir or that degree of damage is lower drilling fluid more efficiently.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, a kind of simulation system simulating drilling fluid down-hole dynamic circulation process is provided, this system automation degree is high, energy real simulation drilling fluid down-hole recurrent state, overcomes the shortcoming that conventional equipment can only simulate the single flow state of drilling fluid.
The object of the invention is to be achieved through the following technical solutions:
Drilling fluid down-hole dynamic circulation simulation system, comprise direct current generator, DC speed regulator, magnetic transmission system and reactor, the rotating shaft of described direct current generator is provided with speed probe, described speed probe is connected with DC speed regulator respectively by data line with direct current generator, described magnetic transmission system is made up of internal rotor and outer rotor, described outer rotor is connected with direct current generator, reactor is arranged on the middle part of described outer rotor, described internal rotor is arranged on reactor inside, internal rotor is connected with rotation staving by coupling shaft, the inwall of described rotation staving is fixedly connected with helical runner, the bottom rotating staving is offered porose, the still wall of described reactor is also provided with core holding unit.
Described core holding unit and reactor inwall tangent.
Described internal rotor is all connected with coupling shaft by bearing with rotation staving.
Described coupling shaft is threaded with adopting bottom reactor.
Compared with prior art, the beneficial effect that technical scheme of the present invention is brought is:
1. when in present system, the internal rotor of magnetic transmission system rotates, driven rotary staving rotates, the helical runner rotated in staving and then rotates, along with drilling fluid is drawn into helical runner bottom by the rotation of helical runner, because the bottom rotating staving is provided with aperture, drilling fluid flow in the annular space between rotation staving and autoclave inwall by aperture, and the flowing formed from bottom to top, reach simulation drilling fluid on return flow effect, the rotation rotating staving and helical runner then simulate drilling fluid when pit shaft is inner due to drilling tool rotate cause rotational shear effect, DC motor speed size is controlled by DC speed regulator, can control to return flowing velocity and rotational shear speed, realize can simulate on an equipment simultaneously drilling fluid on return flow state and rotational flow state.
2. adopt magnetic transmission system to simulate the Real Flow Field state of drilling fluid in the present invention, well solve the High Temperature High Pressure sealing problem of equipment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 of the present inventionly analyses and observe structure for amplifying schematic diagram.
Reference numeral: 1-direct current generator 2-DC speed regulator 3-speed probe 4-magnetic transmission system 5-reactor 6-core holding unit 7-rotates staving 8-helical runner 9-coupling shaft 40-outer rotor 41-internal rotor
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As depicted in figs. 1 and 2, drilling fluid down-hole dynamic circulation simulation system, comprise direct current generator 1, DC speed regulator 2, magnetic transmission system 4 and reactor 5, magnetic transmission system 4 is made up of outer rotor 40 and internal rotor 41, outer rotor 40 adopts fixed form to be connected with direct current generator 1, the rotating shaft of direct current generator 1 is provided with speed probe 3, speed probe 3 is connected with DC speed regulator 2 respectively by data line with direct current generator 1, reactor 5 is arranged on the middle part of outer rotor 40, reactor 5 in the present invention adopts the reactor of high temperature high voltage resistant, internal rotor 41 is arranged on the inside of reactor 5, internal rotor 41 is serially connected by coupling shaft 9 and rotation staving 7, internal rotor 41 is all connected with coupling shaft 9 by bearing with rotation staving 7, coupling shaft 9 adopts with the bottom of reactor 5 and is threaded, the inwall rotating staving 7 is welded with helical runner 8, and the bottom rotating staving 7 is offered porose, and the still wall of reactor 5 is also provided with core holding unit 6, and core holding unit 6 is tangent with the inwall of reactor 5.
The principle of work of present system is as follows: when carrying out simulated experiment, open direct current generator 1, direct current generator 1 drives magnetic transmission system 4 to rotate, outer rotor 40 and internal rotor 41 rotate simultaneously, when internal rotor 41 rotates, driven rotary staving 7 rotates, the helical runner 8 rotated in staving 7 and then rotates, along with drilling fluid to be drawn into the bottom of helical runner 8 by the rotation of helical runner 8, because the bottom rotating staving 7 is provided with aperture, drilling fluid flow in the annular space between rotation staving 7 and autoclave 5 inwall by aperture, and the flowing formed from bottom to top, reach simulation drilling fluid on return flow effect, the rotation rotating staving 7 and helical runner 8 then simulate drilling fluid when pit shaft is inner due to drilling tool rotate cause rotational shear effect, the rotating speed size of direct current generator 1 is controlled by DC speed regulator 2, can control to return flowing velocity and rotational shear speed, realize can simulate on an equipment simultaneously drilling fluid on return flow state and rotational flow state.
Claims (4)
1. drilling fluid down-hole dynamic circulation simulation system, it is characterized in that, comprise direct current generator, DC speed regulator, magnetic transmission system and reactor, the rotating shaft of described direct current generator is provided with speed probe, described speed probe is connected with DC speed regulator respectively by data line with direct current generator, described magnetic transmission system is made up of internal rotor and outer rotor, described outer rotor is connected with direct current generator, reactor is arranged on the middle part of described outer rotor, described internal rotor is arranged on reactor inside, internal rotor is connected with rotation staving by coupling shaft, the inwall of described rotation staving is fixedly connected with helical runner, the bottom rotating staving is offered porose, the still wall of described reactor is also provided with core holding unit.
2. drilling fluid down-hole according to claim 1 dynamic circulation simulation system, is characterized in that, described core holding unit and reactor inwall tangent.
3. drilling fluid down-hole according to claim 1 dynamic circulation simulation system, is characterized in that, described internal rotor is all connected with coupling shaft by bearing with rotation staving.
4. drilling fluid down-hole according to claim 1 dynamic circulation simulation system, is characterized in that, described coupling shaft is threaded with adopting bottom reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338702.5A CN104897858A (en) | 2015-06-17 | 2015-06-17 | System for simulating underground dynamic circulation of drilling fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338702.5A CN104897858A (en) | 2015-06-17 | 2015-06-17 | System for simulating underground dynamic circulation of drilling fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104897858A true CN104897858A (en) | 2015-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510338702.5A Pending CN104897858A (en) | 2015-06-17 | 2015-06-17 | System for simulating underground dynamic circulation of drilling fluid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089940A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Evaluation device and evaluation method for desulfurization effect of desulfurizing agent |
Citations (5)
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| CN101672725A (en) * | 2009-08-05 | 2010-03-17 | 山东陆海钻采科技有限公司 | Intelligent type high-temperature high-pressure multifunctional dynamic evaluation experimental apparatus of drilling fluid |
| CN102507629A (en) * | 2011-10-26 | 2012-06-20 | 西南石油大学 | Device for dynamically simulating ageing of drilling fluid at well bottom |
| CN102787817A (en) * | 2012-09-08 | 2012-11-21 | 东北石油大学 | Comprehensive simulation experimental device of drilling circulation system |
| CN102979505A (en) * | 2012-12-06 | 2013-03-20 | 中国海洋石油总公司 | Well cementation cement sheath performance simulation experiment device and experiment method |
| CN103323212A (en) * | 2013-06-28 | 2013-09-25 | 西南石油大学 | Experimental device and method for simulating wellbore annulus drilling fluid flow characteristics |
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2015
- 2015-06-17 CN CN201510338702.5A patent/CN104897858A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672725A (en) * | 2009-08-05 | 2010-03-17 | 山东陆海钻采科技有限公司 | Intelligent type high-temperature high-pressure multifunctional dynamic evaluation experimental apparatus of drilling fluid |
| CN102507629A (en) * | 2011-10-26 | 2012-06-20 | 西南石油大学 | Device for dynamically simulating ageing of drilling fluid at well bottom |
| CN102787817A (en) * | 2012-09-08 | 2012-11-21 | 东北石油大学 | Comprehensive simulation experimental device of drilling circulation system |
| CN102979505A (en) * | 2012-12-06 | 2013-03-20 | 中国海洋石油总公司 | Well cementation cement sheath performance simulation experiment device and experiment method |
| CN103323212A (en) * | 2013-06-28 | 2013-09-25 | 西南石油大学 | Experimental device and method for simulating wellbore annulus drilling fluid flow characteristics |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111089940A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Evaluation device and evaluation method for desulfurization effect of desulfurizing agent |
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Application publication date: 20150909 |