CN102707016A - Evaluation method and device for coating-restraining performance of drilling fluid system - Google Patents
Evaluation method and device for coating-restraining performance of drilling fluid system Download PDFInfo
- Publication number
- CN102707016A CN102707016A CN2012101794381A CN201210179438A CN102707016A CN 102707016 A CN102707016 A CN 102707016A CN 2012101794381 A CN2012101794381 A CN 2012101794381A CN 201210179438 A CN201210179438 A CN 201210179438A CN 102707016 A CN102707016 A CN 102707016A
- Authority
- CN
- China
- Prior art keywords
- drilling fluid
- landwaste
- pressure
- piece
- hardness test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention provides an evaluation method for a coating-restraining performance of a drilling fluid system. The evaluation method comprises the following steps: dynamically soaking a rock debris block into a to-be-evaluated drilling fluid system and lasting for a preset period of time; taking out the rock debris block and cleaning away the drilling fluid attached to the surface; placing the rock debris block into a hardness test jar; applying a pressure, thereby extruding the rock debris block out of the hardness test jar, wherein the hardness test jar has a preset ultimate pressure value; and collecting change values of the applied pressure in real time and drawing a pressure change curve, wherein if the time for the value of the applied pressure reaching the ultimate pressure value is shorter, the hardness of the soaked rock debris block is higher and the coating-restraining performance of the drilling fluid system is stronger. The invention also provides an evaluation device applied to the evaluation method.
Description
Technical field
The present invention relates to the oil drilling field, particularly a kind of drilling fluid system suppresses to encapsulate method of evaluating performance and equipment.
Background technology
Do not disperse drilling fluid system to be used widely in the wellbore construction in modern times because of the inhibition with excellence encapsulates performance.The inhibition of how to evaluate drilling fluid system or treating agent encapsulates performance and seems particularly important.
At present comparatively general drilling fluid system encapsulating ability can evaluation method have linear plavini and rolling recovery method.The linear expansion method can effective evaluation drilling fluid system to the repression of swelling effect of landwaste, but can not characterize the inhibition peptizaiton of drilling fluid system.Rolling recovery method can the effective evaluation drilling fluid system the inhibition dispersive property, but can not characterize the repression of swelling effect of drilling fluid system.And two kinds of methods do not relate to the evaluation to landwaste bulk strength behind the drilling fluid system dynamic soaking.
Evaluation method for the landwaste bulk strength has needle penetration method and sillar bearing resistance method usually.The needle penetration method was to measure the ability of the soft or hard degree of pitch and railway grease, denseness, opposing shear failure originally, was not suitable for being used for the measurement of landwaste bulk strength.Sillar bearing resistance method characterizes the cohesion and the internal friction of rock; These class methods all need the sillar shape of rule and static drilling fluid to soak and metering system, can not simulate the temperature, pressure condition and the motion state of landwaste piece drilling fluid system in the wellbore construction process.
Therefore, above-mentioned drilling fluid system encapsulating ability can evaluation method all have limitation, can not be advantageously applied in the practical operation of wellbore construction.
Summary of the invention
First purpose of the present invention provides a kind of drilling fluid system and suppresses to encapsulate method of evaluating performance, and the inhibition that this method is assessed drilling fluid system through the hardness variation of the landwaste piece in the measuring drilling fluid system behind simulation drilling fluid temperature pressure condition dynamic soaking encapsulates performance.
Drilling fluid system of the present invention suppresses to encapsulate method of evaluating performance and may further comprise the steps:
Landwaste piece dynamic soaking is also continued the schedule time in drilling fluid system to be evaluated, take out the drilling fluid of landwaste piece and cleaning and removing surface attachment then;
The landwaste piece is placed the hardness test jar, and force the landwaste piece to be extruded the hardness test jar through exerting pressure, said hardness test jar has a preset extreme pressure value;
Gather the applied pressure changing value in real time, and draw pressure history;
Reach capacity time of force value of institute's applied pressure value is short more, explains that the hardness of the landwaste piece after soaking is big more, and it is strong more that the inhibition of drilling fluid system encapsulates ability.
Preferably, said drilling fluid system suppresses to encapsulate method of evaluating performance and also comprises:
Gather the mass value of the landwaste piece of extruding the hardness test jar in real time, and the rendering quality change curve;
When the applied pressure value reached capacity force value, the mass value of landwaste piece of extruding the hardness test jar was low more, explained that the hardness of the landwaste piece after soaking is big more, and it is strong more that the inhibition of drilling fluid system encapsulates ability.
In conjunction with the two the variation of force value and mass value, can make more accurately the inhibition ability of encapsulating of the intensity of landwaste piece and drilling fluid system and estimating.
Preferably, landwaste piece of the present invention is 3/8 inch～3/4 an inch landwaste piece, preferably uses standard drilling cuttings Hole plug (natural sodium bentonite grain), but also can obtain corresponding landwaste piece according to the specific lithology of different oil field blocks, layer position.
Said " dynamic soaking " is meant, is put in metal or the glass jar (to select which kind of tank body according to experimental temperature) to the drilling fluid that is added with the landwaste piece, uses the roller heating furnace to experimentize.The roller heating furnace is that drilling fluid is estimated common apparatus, state such as can simulation well temperature, pressure, annular space down circulates, and is used to study drilling fluid in the performance that heats under the rolling condition.Generally, drilling fluid with metal or glass jar axial rotation, is in laminar condition (for turbulent flow) together with the landwaste piece.
Said " extreme pressure value " be meant, for fear of equipment impaired and in the process of extruding landwaste piece to the ultimate value of a preset safety of institute's applied pressure, reach this value, equipment promptly quits work, and no longer continues pressure boost.The span of extreme pressure value generally can be between 5Mpa～20Mpa, and concrete value can be set according to the actual conditions of equipment and drilling fluid to be measured.
Preferably, the landwaste piece be under certain temperature, pressure condition dynamic soaking in drilling fluid system to be evaluated.Temperature is accurate highest stabilizing temperature or the formation temperature on the used stratum of drilling fluid or the circulating temperature (according to concrete system application conditions decision) on the used stratum of drilling fluid of system; Pressure is generally normal pressure, and the pressure in the tank body of heating back is the saturated vapor pressure (also can under the 100psi inert gas conditions, carry out) of respective liquid.
Preferably, the landwaste piece soaked in drilling fluid system about 1～16 hour, can confirm the concrete time according to different drilling cuttings conditions.
Preferably, adopt the bring bottoms up drilling fluid of piece surface attachment of the WS of salt solution or isopropyl alcohol.Wherein, salt solution can use saturated brine; In the WS of isopropyl alcohol, the concentration of isopropyl alcohol can be 40%～60%.
Drilling fluid system of the present invention suppresses to encapsulate in the method for evaluating performance, preferably, can apply axle pressure to the landwaste piece through constant-flux pump, mechanical torque or inert gas air pressure.Most preferably, adopt constant-flux pump to apply axle pressure, constant-flux pump can provide constant current speed and two kinds of mode of operations of constant voltage, increases digital display manometer in the line simultaneously, thereby can gather pressure data in real time through computer software.
Because it is relevant that the hardness of the landwaste piece that in drilling fluid system, soaked and the inhibition of system encapsulate performance.The degree of hydration that suppresses to encapsulate the landwaste piece due to the ability difference according to drilling fluid system is different, thereby causes the hardness of landwaste piece different, can encapsulate performance evaluation to the inhibition of drilling fluid system.Method of the present invention not only can encapsulate performance evaluation to the inhibition of drilling fluid system, has also reacted the hardness level of landwaste piece under the drilling well Dynamic Construction condition of simulation simultaneously.In addition, method of the present invention also has the characteristics of strong operability, is highly suitable for the practice of wellbore construction.
Another object of the present invention provides a kind of valuator device that above-mentioned drilling fluid system inhibition encapsulates the evaluation method of performance that is used for.
Said valuator device comprises support 1, hardness test jar 2, cover 3, base ring 4, chassis 5, take-up reel 8, snap ring 9 and meausring apparatus 10, wherein:
Further, cover 3 is provided with pressure interface 31; The pressure interface 31 of cover 3 connects hydraulic pressure manifold 6.Hydraulic pressure manifold 6 is provided with pressure control valve 7 and tensimeter 61, so that gather the change value of pressure of pressure space in real time.
Further, chassis 5 is provided with a plurality of holes in different apertures, and said aperture is 1mm～5mm; The lower surface on chassis 5 also is provided with rotatable scraper 30.
It is exquisite, workable that drilling fluid system of the present invention suppresses to encapsulate the performance evaluation device structure, can be advantageously applied to above-mentioned drilling fluid system and suppress to encapsulate in the method for evaluating performance.
Description of drawings
Fig. 1 suppresses to encapsulate the organigram of performance evaluation equipment for the drilling fluid system of the embodiment of the invention.
Fig. 2 suppresses to encapsulate in the method for evaluating performance pressure and landwaste piece mass change curve map for the drilling fluid system of the embodiment of the invention.
Embodiment
Those skilled in the art will make further detailed description to the present invention below, so that can put into practice the present invention.Should be appreciated that and to adopt other embodiments, and can make suitable change and do not depart from the spirit or scope of the present invention.For fear of for making those skilled in the art can put into practice unnecessary details the present invention, instructions possibly omit some known to those skilled in the art information.Therefore, below describe in detail and should not understand, and scope of the present invention is only defined by accompanying claims with restrictive meaning.
See also Fig. 1, it suppresses to encapsulate performance evaluation equipment for drilling fluid system of the present invention.As shown in Figure 1, the drilling fluid system of the embodiment of the invention suppresses to encapsulate performance evaluation equipment and mainly comprises support 1, hardness test jar 2, cover 3, base ring 4, chassis 5, take-up reel 8, snap ring 9 and meausring apparatus 10 or the like.
The top of hardness test jar 2 is through the cover 3 that has been threaded.Chassis 5 is positioned at the bottom of hardness test jar 2, and it is provided with (a plurality of holes of 1mm～5mm), different apertures.The bottom periphery of hardness test jar 2 is through the base ring 4 that has been threaded.
Include in the hardness test jar 2 spatial separation in the jar is two-part batching plug 21 up and down, this batching plug 21 can move up and down in hardness test jar 2 under the pressure of gas or liquid.The space of batching plug 21 tops is a pressure space 22 in the hardness test jar 2, and the space of batching plug 21 belows is a drilling cuttings lab space 23.
In the present embodiment, batching plug 21 adopts hydraulic pressure to move.Cover 3 is provided with pressure interface 31, can connect the external pressure supply arrangement such as hydraulically operated equipment (HOE) or the like.In the present embodiment, the pressure interface 31 on the cover 3 connects hydraulically operated equipment (HOE) through hydraulic pressure manifold 6.Hydraulic pressure manifold 6 is provided with pressure control valve 7.On hydraulic pressure manifold 6, tensimeter 61 can also be set, so that the pressure in the Real Time Observation pressure space 22.
The lower surface on chassis 5 also can be provided with scraper 30, can easily the landwaste of extruding hardness test jar 2 be scraped in take-up reel 8 through revolving scraper 30.
In the present embodiment, hydraulically operated equipment (HOE) is a constant-flux pump, and it further links to each other with terminal, thereby can be gathered and drawn out the mass change figure of the drilling cuttings that pressure history figure and take-up reel 8 in the pressure space 22 received by computer software in real time.
The inhibition of drilling fluid system is encapsulated performance when estimating; At first landwaste piece (standard drilling cuttings Hole plug) dynamic soaking under 50 ℃ of temperature, 100psi pressure is taken out the landwaste piece and with the drilling fluid of saturated brine cleaning and removing landwaste piece surface attachment in drilling fluid system to be evaluated and continue 2 hours then.
Landwaste piece after will soaking subsequently places the drilling cuttings lab space 23 of the hardness test jar 2 of valuator device shown in Figure 1; Applying axle pressure through constant-flux pump moves downward batching plug 21; And force the landwaste piece under pressured state, to be extruded hardness test jar 2; That is, drop on receiving plate 8 through the hole that is provided with on the chassis 5.
Gather the mass value of the drilling cuttings that force value and take-up reel 8 in the pressure spaces 22 receive in real time through tensimeter 61 and meausring apparatus 10.Draw pressure history and mass change curve through computer software then.
According to the method described above, under equal conditions, draw the pressure history and the mass change curve of the correspondence of one group of drilling fluid system to be evaluated.Then through comparative analysis, can to this inhibition of organizing drilling fluid system to be evaluated encapsulate performance and soak after the hardness of landwaste piece make an appraisal.It is short more that institute's applied pressure value reaches time of extreme pressure value of equipment, explains that the hardness of the landwaste piece after soaking is big more, and it is strong more that the inhibition of drilling fluid system encapsulates ability.Simultaneously, when institute's applied pressure value reached the extreme pressure value of equipment, the mass value of landwaste piece of extruding the hardness test jar was low more, explained that the hardness of the landwaste piece after soaking is big more, and it is strong more that the inhibition of drilling fluid system encapsulates ability.
Application example:
Landwaste piece after will soaking subsequently places the drilling cuttings lab space 23 of the hardness test jar 2 of valuator device shown in Figure 1; Applying axle pressure through constant-flux pump moves downward batching plug 21; And force the landwaste piece under pressured state, to be extruded hardness test jar 2; That is, drop on receiving plate 8 through the hole that is provided with on the chassis 5.
Equipment is gathered pressure (P) and the quality (M) in the experimentation automatically, and the result is as shown in table 1 below.
Table 1
Draw the pressure and the mass change curve map of this group drilling fluid system to be evaluated according to the data in the table 1.As shown in Figure 2.
Can find out from table 1 data and Fig. 2: it is the poorest that the inhibition of 1# drilling fluid system encapsulates performance; Landwaste hardness after the immersion is minimum; The time of its force value that reaches capacity (5mPa) is the longest, is 36min, and the landwaste quality of extrusion constantly rises; Quality is maximum, and the landwaste quality that extrudes when reaching capacity force value reaches 19.9g.The inhibition of 2# drilling fluid system encapsulates better performances, and the time of the force value that reaches capacity (5mPa) is 30min, and the landwaste quality that extrudes when reaching capacity force value is 14.8g.It is best relatively that the 3# drilling fluid system suppresses to encapsulate performance, the hardness maximum of the landwaste after the immersion, and the aquation part is minimum, and the time of the force value that reaches capacity (5mPa) is merely 20min, and the landwaste quality that extrudes when reaching capacity force value is merely 8.2g.
In sum; More than being merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, therefore; All any modifications of within spirit of the present invention and principle, being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a drilling fluid system suppresses to encapsulate method of evaluating performance, may further comprise the steps:
Landwaste piece dynamic soaking is also continued the schedule time in drilling fluid system to be evaluated, take out the drilling fluid of landwaste piece and cleaning and removing surface attachment then;
The landwaste piece is placed the hardness test jar, and force the landwaste piece to be extruded the hardness test jar through exerting pressure, said hardness test jar has a preset extreme pressure value;
Gather the applied pressure changing value in real time, and draw pressure history;
Reach capacity time of force value of institute's applied pressure value is short more, explains that the hardness of the landwaste piece after soaking is big more, and it is strong more that the inhibition of drilling fluid system encapsulates ability.
2. the method for claim 1 also comprises:
Gather the mass value of the landwaste piece of extruding the hardness test jar in real time, and the rendering quality change curve;
When the applied pressure value reached capacity force value, the mass value of landwaste piece of extruding the hardness test jar was low more, explained that the hardness of the landwaste piece after soaking is big more, and it is strong more that the inhibition of drilling fluid system encapsulates ability.
3. the method for claim 1, wherein said landwaste piece be under certain temperature, pressure condition dynamic soaking in drilling fluid system to be evaluated; Said temperature is accurate highest stabilizing temperature or the formation temperature on the used stratum of drilling fluid or the circulating temperature on the used stratum of drilling fluid of system; Said pressure is normal pressure or 100psi.
4. the method for claim 1, wherein said landwaste piece dynamic soaking are in drilling fluid system to be evaluated and continue 1～16 hour.
5. the method for claim 1, the drilling fluid of wherein said landwaste piece surface attachment adopt the WS of salt solution or isopropyl alcohol to clean; Said salt solution is saturated brine, and in the said isopropanol water solution, the concentration of isopropyl alcohol is 40%～60%.
6. the method for claim 1 is wherein exerted pressure to the landwaste piece through constant-flux pump.
7. one kind is used for the valuator device that the described drilling fluid system of claim 1 suppresses to encapsulate method of evaluating performance, and it comprises support 1, hardness test jar 2, cover 3, base ring 4, chassis 5, take-up reel 8, snap ring 9 and meausring apparatus 10, wherein:
Hardness test jar 2 is fixed on the support 1 of vertical placement through snap ring 9; The top of hardness test jar 2 is through the cover 3 that has been threaded; Have the chassis 5 in a plurality of holes to be positioned at the bottom of hardness test jar 2, the bottom periphery of hardness test jar 2 is through the base ring 4 that has been threaded; Include in the hardness test jar 2 spatial separation in the jar is two-part batching plug 21 up and down, batching plug 21 can move up and down in hardness test jar 2; Hardness test jar 2 is suspended in take-up reel 8 tops, and take-up reel 8 is placed on the meausring apparatus 10.
8. equipment as claimed in claim 7, wherein, cover 3 is provided with pressure interface 31; The pressure interface 31 of cover 3 connects hydraulic pressure manifold 6.
9. equipment as claimed in claim 8, wherein, hydraulic pressure manifold 6 is provided with pressure control valve 7 and tensimeter 61.
10. equipment as claimed in claim 7, wherein, chassis 5 is provided with a plurality of holes in different apertures, and said aperture is 1mm～5mm; Said chassis 5 lower surfaces are provided with rotatable scraper 30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210179438.1A CN102707016B (en) | 2012-06-01 | 2012-06-01 | Evaluation method and device for coating-restraining performance of drilling fluid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210179438.1A CN102707016B (en) | 2012-06-01 | 2012-06-01 | Evaluation method and device for coating-restraining performance of drilling fluid system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102707016A true CN102707016A (en) | 2012-10-03 |
| CN102707016B CN102707016B (en) | 2014-10-22 |
Family
ID=46899953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210179438.1A Active CN102707016B (en) | 2012-06-01 | 2012-06-01 | Evaluation method and device for coating-restraining performance of drilling fluid system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102707016B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407099A (en) * | 2014-10-16 | 2015-03-11 | 中国海洋石油总公司 | Sand cleaning fluid performance testing method |
| CN109115628A (en) * | 2018-07-27 | 2019-01-01 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of method for estimating stability of drilling fluid to rock stratum |
| CN110595900A (en) * | 2019-09-29 | 2019-12-20 | 太原理工大学 | Method for testing deformation and damage of coal pillar under condition of longitudinal non-uniform distribution of moisture |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87205997U (en) * | 1987-04-06 | 1988-03-23 | 华北石油管理局钻井工艺研究所 | Dilatometer |
| US6009747A (en) * | 1998-05-27 | 2000-01-04 | Petroleo Brasileiro S.A.-Petrobras | Method for evaluating drilling fluids |
| US6435021B1 (en) * | 1999-11-26 | 2002-08-20 | Eni S.P.A. | Process for verifying the effectiveness of drilling fluids in stabilizing oil well walls |
| CN101532936A (en) * | 2009-04-14 | 2009-09-16 | 中国地质大学（武汉） | Method and device for evaluating inhibiting ability of drilling fluid on formation and decomposition of hydrate |
| CN202676563U (en) * | 2012-06-01 | 2013-01-16 | 中国海洋石油总公司 | Device for evaluating inhibition coating performance of drilling fluid system |
-
2012
- 2012-06-01 CN CN201210179438.1A patent/CN102707016B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87205997U (en) * | 1987-04-06 | 1988-03-23 | 华北石油管理局钻井工艺研究所 | Dilatometer |
| US6009747A (en) * | 1998-05-27 | 2000-01-04 | Petroleo Brasileiro S.A.-Petrobras | Method for evaluating drilling fluids |
| US6435021B1 (en) * | 1999-11-26 | 2002-08-20 | Eni S.P.A. | Process for verifying the effectiveness of drilling fluids in stabilizing oil well walls |
| CN101532936A (en) * | 2009-04-14 | 2009-09-16 | 中国地质大学（武汉） | Method and device for evaluating inhibiting ability of drilling fluid on formation and decomposition of hydrate |
| CN202676563U (en) * | 2012-06-01 | 2013-01-16 | 中国海洋石油总公司 | Device for evaluating inhibition coating performance of drilling fluid system |
Non-Patent Citations (2)
| Title |
|---|
| 刘滨等: "钻井液抑制性能评价标准研究", 《钻采工艺》, vol. 20, no. 2, 25 March 1997 (1997-03-25) * |
| 王中华: "国内外钻井液技术进展及对钻井液的有关认识", 《中外能源》, vol. 16, no. 1, 15 January 2011 (2011-01-15) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407099A (en) * | 2014-10-16 | 2015-03-11 | 中国海洋石油总公司 | Sand cleaning fluid performance testing method |
| CN109115628A (en) * | 2018-07-27 | 2019-01-01 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of method for estimating stability of drilling fluid to rock stratum |
| CN110595900A (en) * | 2019-09-29 | 2019-12-20 | 太原理工大学 | Method for testing deformation and damage of coal pillar under condition of longitudinal non-uniform distribution of moisture |
| CN110595900B (en) * | 2019-09-29 | 2021-10-01 | 太原理工大学 | Method for testing deformation and damage of coal pillar under condition of longitudinal non-uniform distribution of moisture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102707016B (en) | 2014-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tan et al. | A simulation method for permeability of porous media based on multiple fractal model | |
| Boukpeti et al. | Strength of fine-grained soils at the solid–fluid transition | |
| CN203214043U (en) | Well drilling simulation device | |
| GB2580254A (en) | Reduction in bentonite-based grout concentration in grout fluids | |
| CN104675395B (en) | A kind of evaluation method of stratiform hard brittle shale hydration characteristics | |
| CN105067435A (en) | Soil in-suit boring shearing testing device | |
| Vergara et al. | Swelling behavior of volcanic rocks under cyclic wetting and drying | |
| CN109632510A (en) | A method of prediction aquation damages shale intensity | |
| CN102707016A (en) | Evaluation method and device for coating-restraining performance of drilling fluid system | |
| CN107179232B (en) | Method for evaluating stability of shale | |
| CN104463345B (en) | A kind of method and device for predicting stratum oil-water interface position | |
| Wang et al. | Stability of Liangshuijing landslide under variation water levels of Three Gorges Reservoir | |
| CN110208487A (en) | A kind of Shale Hydration damage measure method based on CT scan | |
| CA3043516A1 (en) | Invert emulsion drilling fluids with fatty acid and fatty amine rheology modifiers | |
| Lucky et al. | Modification of Bingham plastic rheological model for better rheological characterization of synthetic based drilling mud | |
| EP2681411A2 (en) | Designed drilling fluids for ecd management and exceptional fluid performance | |
| CN204903300U (en) | Testing arrangement is cuted in drilling of soil body normal position | |
| CN202676563U (en) | Device for evaluating inhibition coating performance of drilling fluid system | |
| Mahto | The prevention of differential pipe sticking problems caused by water-based drilling | |
| CN107843531B (en) | Nuclear magnetic resonance parameter characterization method for pore structure of low-permeability and low-viscosity oil reservoir | |
| Altindal et al. | Impact of viscoelastic characteristics of oil based muds/synthetic based muds on cuttings settling velocities | |
| CN208206743U (en) | Karst collapse col umn visualizes seepage flow test device | |
| Amir et al. | Rheological behavior and temperature dependency study of Saraline-based super lightweight completion fluid | |
| CN103091022A (en) | Simulation test device used for packer and packing-removing tension test method thereof | |
| CN108562610A (en) | A kind of method and system of determining thermal conductivity of rocks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |