CN104060955A - Drilling fluid purifying plant and method adopted to purify drilling fluid - Google Patents
Drilling fluid purifying plant and method adopted to purify drilling fluid Download PDFInfo
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- CN104060955A CN104060955A CN201310088396.5A CN201310088396A CN104060955A CN 104060955 A CN104060955 A CN 104060955A CN 201310088396 A CN201310088396 A CN 201310088396A CN 104060955 A CN104060955 A CN 104060955A
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Abstract
The invention relates to a drilling fluid purifying plant and a method adopted to purify the drilling fluid. The drilling fluid purifying plant comprises a liquid storing pot, a drilling fluid purifier communicated with the liquid storing pot and a circulating pump which enables the drilling fluid to circulate between the liquid storing pot and the drilling fluid purifier, wherein the drilling fluid purifier comprises a separator provided with a liquid inlet pipe, an upper outlet and a lower outlet and a vibrating screen communicated with the lower outlet of the separator; the drilling fluid is pumped by the circulating pump from the liquid storing pot into the separator; fluid with lost circulation materials discharged from the upper outlet of the separator flows into a downstream device; matters discharged from the lower outlet of the separator are separated through the vibrating screen, and fluid part returns to the liquid storing pot, so that harmful solidities are removed. According to the invention, not only can the drilling fluid purifying plant purify the drilling fluid, but also the lost circulation materials in the drilling fluid can be guaranteed within effective content range so that a large number of lost circulation materials don't need to be supplemented.
Description
Technical field
The present invention relates to a kind of drilling rig, particularly a kind of clean drilling liquid purifier.The invention still further relates to the method that uses this drilling-liquid purifying apparatus clean drilling liquid.
Background technology
In oil drilling process, conventionally use the level Four solid control equipment of involving vibrations sieve, desander, desilter and centrifuge that drilling fluid is filtered and purified.But, use in the drilling process of this level Four solid control equipment, often run into the problem of leakage.Once generation leakage, not only can incur loss through delay drilling time, loss drilling fluid, this not only can damage oil-gas Layer, and also, likely due to the generation of the complex accident such as borehole well instability causes bit freezing, caves in, blowout, this has seriously restricted petroleum exploration and development speed.
In Process of Oil Well Drilling, conventionally adopt sealing fluid while drilling (adding the drilling fluid of plugging while drilling material) to circulate and creep at present.In order to solve leakage problem, conventionally adopt two kinds of methods: (1) closes solid control equipment, but cannot filter drilling fluid, cause landwaste to remove in time and easily cause the down-hole complexity such as sand setting bit freezing; (2) enable solid control equipment, but plugging while drilling material returns out while flowing through vibrosieve and can be screened out from well head, thereby need to supplement in time plugging while drilling material, this has greatly increased drilling cost and drilling fluid maintenance workload.Therefore, be badly in need of a kind ofly can filtering the concentration that drilling fluid can keep again the plugging while drilling material in drilling fluid.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of drilling-liquid purifying apparatus.This drilling-liquid purifying apparatus not only can clean drilling liquid, and the loss circulation material in drilling fluid can be ensured within the scope of effective content and needn't supplement in a large number loss circulation material.In addition, the invention still further relates to the method that uses this drilling-liquid purifying apparatus clean drilling liquid.
According to a first aspect of the invention, propose a kind of drilling-liquid purifying apparatus, having comprised:
Fluid reservoir, the drilling fluid cleaner being connected with fluid reservoir, and the circulation pump that drilling fluid is circulated between fluid reservoir and drilling fluid cleaner, drilling fluid cleaner comprises with the feed tube being communicated with circulation pump, the eliminator of upper outlet and lower outlet and the vibrosieve being connected with the lower outlet of eliminator, wherein, circulation pump is pumped into eliminator by the drilling fluid that comprises harmful solid from fluid reservoir, the fluid with loss circulation material of discharging from the upper outlet of eliminator flows directly into upstream device, and from eliminator outlet discharge material through vibrosieve from after, fluid section turns back to fluid reservoir and will be harmful to solid removal.
According to drilling-liquid purifying apparatus of the present invention, by using eliminator to make most loss circulation materials without vibrosieve, thereby avoid loss circulation material to be screened out in a large number.Being combined with of eliminator and vibrosieve can be separated the harmful solid in drilling fluid, realizes filtration and the purification of drilling fluid.
In one embodiment, eliminator is the container that comprises tapering part and be arranged on the cylindrical section of the large end of tapering part, wherein, cylindrical section upward, the small end of tapering part downward, feed tube is arranged in the circumferential sides of cylindrical section, and upper outlet is arranged on the top of cylindrical section, and lower outlet is arranged on the bottom of small end part.
In a specific embodiment, the upper outlet of eliminator is in the length of the part of eliminator inside between 180mm-220mm, and the cone angle of tapering part is between 15 °～19 °.In a preferred embodiment, the upper outlet of eliminator is 205mm in the length of the part of eliminator inside, and the cone angle of tapering part is 17 °.Loss circulation material and the harmful solid in drilling fluid be can separate efficiently by the cone separator of this design, filtration and the purification of drilling fluid realized.
In one embodiment, drilling-liquid purifying apparatus also comprises the liquid guiding tube road that drilling fluid is introduced directly into vibrosieve.By this set, can be in the time only needing clean drilling liquid, do not need to retain while not containing loss circulation material in loss circulation material or drilling fluid, can fast filtering drilling fluid, improve the circulation rate of drilling fluid.In a preferred embodiment, on liquid guiding tube road, be provided with valve.Can control easily like this flow path of drilling fluid.
In one embodiment, between the lower outlet of eliminator and vibrosieve, be also provided with liquid collecting funnel.This liquid collecting funnel can flow by guiding substance, prevents loss of drilling fluid.
In one embodiment, the mesh size degree of the screen cloth of vibrosieve is between 0.25mm～0.425mm.The screen cloth of this structure only can make from eliminator the loss circulation material in drilling fluid that outlet discharges pass through, and harmful solid can not pass through as landwaste, further to reclaim loss circulation material.
According to a second aspect of the invention, propose a kind of method that uses drilling-liquid purifying apparatus clean drilling liquid mentioned above, having comprised:
Step 1: close the valve on liquid guiding tube road and the drilling fluid that comprises harmful solid is incorporated in fluid reservoir;
Step 2: the drilling fluid pump in fluid reservoir is delivered in eliminator by circulation pump;
Step 3: the fluid with loss circulation material of discharging from the upper outlet of eliminator is directly introduced upstream device, and by the material of discharging from outlet eliminator through vibrosieve from after, fluid section turns back to fluid reservoir and will be harmful to solid and get rid of.
In one embodiment, in the time of clean drilling liquid only, open the valve being arranged on liquid guiding tube road, make drilling fluid only enter vibrosieve by liquid guiding tube road.
In this application, term " on ", D score is defined as taking gravity direction as reference.
Compared with prior art, the invention has the advantages that: by using eliminator to make loss circulation material without vibrosieve, thereby avoided loss circulation material to be screened out.Being combined with of eliminator and vibrosieve can be separated the harmful solid in drilling fluid, realizes filtration and the purification of drilling fluid.Clarifier comprises the liquid guiding tube road that drilling fluid is introduced directly into vibrosieve.By this set, can be in the time only needing clean drilling liquid, do not need to retain while not containing loss circulation material in loss circulation material or drilling fluid, can fast filtering drilling fluid, improve the circulation rate of drilling fluid.In addition, drilling-liquid purifying apparatus of the present invention is simple in structure, operates also more convenient.
Brief description of the drawings
To be described in more detail the present invention based on embodiment and with reference to accompanying drawing hereinafter.Wherein:
Fig. 1 is the structural representation according to drilling-liquid purifying apparatus of the present invention;
Fig. 2 is the structural representation for the clarifier of the drilling-liquid purifying apparatus of Fig. 1;
Fig. 3 is for according to the structural representation of the eliminator of clarifier of the present invention.
In the drawings, identical member is indicated by identical Reference numeral.Accompanying drawing is not according to actual scale.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 has schematically shown according to the structure of drilling-liquid purifying apparatus 100 of the present invention.Drilling-liquid purifying apparatus 100 comprises the fluid reservoir 1 for storing drilling fluid, the clarifier 2 being connected with fluid reservoir 1, and the circulation pump 11 that drilling fluid is circulated between fluid reservoir 1 and clarifier 200.Fluid reservoir 1 not only can be stored drilling fluid but also can precipitate the larger material of density in drilling fluid, and the such as rock particles in drilling fluid etc. are to realize pre-separation effect.As shown in Figure 1, fluid reservoir 1 can directly be communicated with to introduce drilling fluid by pipeline 3 and extraneous drilling fluid.In one embodiment, on pipeline 3, be also provided with valve 13 can avoid drilling fluid directly to enter in fluid reservoir 1.
In the embodiment shown in fig. 1, be provided with opening (not shown), and clarifier 200 is directly installed on opening part to make the design of drilling-liquid purifying apparatus 100 compacter at the top of fluid reservoir 1, size is also correspondingly less.Fig. 2 has schematically shown the structure of clarifier 200.
As shown in Figure 2, clarifier 200 comprises the eliminator 201 for drilling fluid being realized to centrifugation and can filter harmful solid of drilling fluid, the vibrosieve 211 of for example rock chip.Be provided with feed tube 203 at the sidepiece of eliminator 201, and be provided with upper outlet 202 on the top of eliminator 201, be provided with lower outlet (as 304 in Fig. 3) in the bottom of eliminator 201.In confined state, feed tube 203 is by pipeline 6(as shown in Figure 1) be connected the drilling fluid pump in fluid reservoir 1 to be delivered to the inside of eliminator 201 with circulation pump 11.The upper outlet 202 of eliminator 201 is by pipeline 5(as shown in Figure 1) be directly connected to be further processed from the material of upper outlet 202 discharging with components downstream (as slurry tank in Fig. 1 8), and the lower outlet of eliminator 201 aligns material can be discharged on vibrosieve 211 with vibrosieve 211.In a preferred embodiment, between the lower outlet of eliminator 201 and vibrosieve 211, be also provided with liquid collecting funnel 205.Liquid collecting funnel 205 flows for guiding substance, prevents loss of drilling fluid.In order to make the smooth and easy work of vibrosieve 211 energy; clarifier 200 also comprises the drive unit for driving vibrosieve 211; for example motor 215; buffer spring 206, the buffer spring gag lever post 208 etc. of protection vibrosieve 211; these structures are all that those skilled in the art is known, for simplicity repeat no more here.
Fig. 3 has schematically shown the structure of separators according to the present invention 201.As shown in Figure 3, eliminator 201 comprises tapered segment downward of small end 305 and is arranged on the cylindrical part 306 of the large end of conical portion 305.As a whole, eliminator 201 funneling shapes.Feed tube 203 is arranged in the circumferential sides of cylindrical part 306, and is also provided with upper outlet 202 at the top of cylindrical part 306, and lower outlet 304 is arranged on the bottom of tapered segment 305 small end parts.When the drilling fluid of cutting carring with certain speed along cylindrical part 306 tangentially from feed tube 203 enters eliminator 201, can there is High Rotation Speed (as shown in the circumferential arrow in Fig. 3) in drilling fluid.In rotary course, larger, the heavier landwaste in drilling fluid is thrown toward wall under centrifugal action, declines and discharges through lower outlet 304 along housing; And drilling fluid can change direction in the time approaching the bottom of tapered segment 305, form inside spin ascending motion (as in Fig. 3 towards as shown in the arrow of updrift side), leave eliminator 201 finally by upper outlet 202.Like this, be greater than the object of the landwaste of water with regard to having realized the density separating in drilling fluid.
In density in order to ensure eliminator 201 in separation drilling fluid is greater than the landwaste of water; can guarantee to reclaim the loss circulation material that density in drilling fluid is less than water; such as walnut shell, sawdust etc.; in one embodiment; eliminator 201 is configured to the cone angle of tapering part 305 between 15 °～19 °, upper outlet 202 in the length of the part of eliminator 201 inside between 180mm-220mm.Preferably, the cylindrical part 306 of eliminator 201 and the Length Ratio of tapering part 305 are between 1:3～1:2, the internal diameter of eliminator 201 cylindrical parts 306 is between 250mm～300mm, the internal diameter of feed tube 203 is between 65mm～80mm, the internal diameter of upper outlet 202 is between 110mm～130mm, lower outlet 304 internal diameters are between 35mm～55mm, thus the disposal ability 25m of eliminator 201
3/ hr～60m
3between/hr.The eliminator 201 of this structure is separating in landwaste, can make loss circulation material that density is less than water along with along with drilling fluid leaves eliminator 201 from upper outlet 202.Thereby realize in separating landwaste, ensured the content of the loss circulation material in drilling fluid.In a specific embodiment, the upper outlet 202 of eliminator 201 is 205mm in the length of the part of eliminator 201 inside, and the cone angle of tapering part 305 is 17 °.Preferably, the internal diameter of eliminator 201 cylindrical parts 306 is 300mm, the internal diameter of feed tube 203 is 78mm, the internal diameter of upper outlet 202 is 120mm, lower outlet internal diameter is 55mm, the cylindrical part 306 of eliminator 201 is 0.45 with the Length Ratio of tapering part 305, and the disposal ability of the eliminator 201 of this structure is 55m
3/ hr.
As shown in Figure 2, vibrosieve 211 screens out harmful solid in the material of the lower outlet 304 of discharge self-separation device 201, and remaining drilling fluid directly bleeds in fluid reservoir 1.Not only realize filtration, clean drilling liquid by being used in conjunction with of eliminator 201 and vibrosieve 211 like this, and retained the loss circulation material in drilling fluid.In a preferred embodiment, the mesh size of the screen cloth of vibrosieve 211 is 0.25mm.This screen cloth can not pass through landwaste, and remains in the density similar to drilling cuttings in drilling fluid, the loss circulation material of small grain size, and for example granularity is that the calcium carbonate granule that is less than 0.25mm can pass through, thereby can further reclaim loss circulation material.
As shown in Figure 1, drilling-liquid purifying apparatus 100 also comprises the liquid guiding tube road 4 that drilling fluid is introduced directly into vibrosieve 211.Like this, in the time there is no loss circulation material in drilling fluid or do not need to ensure the content of the loss circulation material in drilling fluid, drilling fluid directly can be discharged on vibrosieve 211 and be filtered by liquid guiding tube road 4, to reduce the flow path of drilling fluid, improve the circulation rate of drilling fluid.In a preferred embodiment, on liquid guiding tube road 4, be provided with valve 10.In the time only needing to filter drilling fluid, open valve 10, valve-off 13, stops circulation pump 11(and does not use eliminator 201).In the time not only needing filter drilling fluid but also need to keep loss circulation material, valve-off 10, opens valve 13, and ON cycle pump 11(uses eliminator 201).Thus, by being set, valve 10 facilitated the switching of drilling-liquid purifying apparatus 100 between difference use pattern.
Below, describe and use according to the method for drilling-liquid purifying apparatus 100 clean drilling liquid of the present invention according to Fig. 1 and 2.
First, close the valve 10 on liquid guiding tube road 4, open valve 13 drilling fluid is incorporated in fluid reservoir 1 through pipeline 3.Then, start circulation pump 11, the drilling fluid pump in fluid reservoir 1 is delivered in eliminator 201.Finally, by pipeline 6, the drilling fluid with loss circulation material of discharging self-separation device 201 upper outlets 202 is directly introduced in slurry tank 8 to be for further processing, and the material that discharge self-separation device is exported for 201 times is after vibrosieve 211 separates, remove harmful solid, remaining drilling fluid turns back in fluid reservoir 1.
In the time only needing clean drilling liquid, open the valve 10 being arranged on liquid guiding tube road 4, close the valve 13 on pipeline 3, make drilling fluid only enter vibrosieve 211 by liquid guiding tube road 4.Removing after harmful solid, remaining drilling fluid enters into fluid reservoir 1.
Finally it should be noted that: the foregoing is only the preferred embodiments of the invention, do not form any limitation of the invention.Although the present invention is had been described in detail with reference to foregoing embodiments, for a person skilled in the art, the technical scheme that still can record previous embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a drilling-liquid purifying apparatus, comprising:
Fluid reservoir, the drilling fluid cleaner being connected with described fluid reservoir, and the circulation pump that drilling fluid is circulated between fluid reservoir and drilling fluid cleaner,
Described drilling fluid cleaner comprises with the eliminator of the feed tube, upper outlet and the lower outlet that are communicated with described circulation pump and the vibrosieve being connected with the lower outlet of described eliminator,
Wherein, described circulation pump is pumped into eliminator by the drilling fluid that comprises harmful solid from described fluid reservoir, the fluid with loss circulation material of discharging from the upper outlet of described eliminator flows directly into upstream device, and from described eliminator outlet discharge material through described vibrosieve from after, fluid section turn back to described fluid reservoir and will be harmful to solid remove.
2. drilling-liquid purifying apparatus according to claim 1, it is characterized in that, described eliminator is the container that comprises tapering part and be arranged on the cylindrical section of the large end of tapering part, wherein, upward, downward, described feed tube is arranged in the circumferential sides of described cylindrical section the small end of tapering part cylindrical section, described upper outlet is arranged on the top of described cylindrical section, and described lower outlet is arranged on the bottom of described small end part.
3. drilling-liquid purifying apparatus according to claim 2, is characterized in that, the upper outlet of described eliminator is in the length of the part of described eliminator inside between 180mm-220mm, and the cone angle of tapering part is between 15 °～19 °.
4. drilling-liquid purifying apparatus according to claim 3, is characterized in that, the upper outlet of described eliminator is 205mm in the length of the part of described eliminator inside, and the cone angle of tapering part is 17 °.
5. according to the drilling-liquid purifying apparatus described in any one in the claims, it is characterized in that, also comprise the liquid guiding tube road that drilling fluid is introduced directly into described vibrosieve.
6. according to the drilling-liquid purifying apparatus described in any one in the claims, it is characterized in that, between the lower outlet of described eliminator and described vibrosieve, be also provided with liquid collecting funnel.
7. according to the drilling-liquid purifying apparatus described in any one in the claims, it is characterized in that, the mesh size of the screen cloth of described vibrosieve is between 0.25mm～0.425mm.
8. drilling-liquid purifying apparatus according to claim 5, is characterized in that, on described liquid guiding tube road, is provided with valve.
9. use, according to the drilling-liquid purifying apparatus clean drilling liquid method described in any one in the claims, comprising:
Step 1: close the valve on described liquid guiding tube road and the drilling fluid that comprises harmful solid is incorporated in described fluid reservoir;
Step 2: the drilling fluid pump in described fluid reservoir is delivered in eliminator by circulation pump;
Step 3: the fluid with loss circulation material of discharging from the upper outlet of described eliminator is directly introduced upstream device, and by from described eliminator outlet discharge material through described vibrosieve from after, fluid section turn back to described fluid reservoir and will be harmful to solid get rid of.
10. method according to claim 9, is characterized in that, in the time of clean drilling liquid only, opens the valve being arranged on described liquid guiding tube road, makes drilling fluid only enter described vibrosieve by liquid guiding tube road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310088396.5A CN104060955A (en) | 2013-03-19 | 2013-03-19 | Drilling fluid purifying plant and method adopted to purify drilling fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310088396.5A CN104060955A (en) | 2013-03-19 | 2013-03-19 | Drilling fluid purifying plant and method adopted to purify drilling fluid |
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| CN104060955A true CN104060955A (en) | 2014-09-24 |
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| CN201310088396.5A Pending CN104060955A (en) | 2013-03-19 | 2013-03-19 | Drilling fluid purifying plant and method adopted to purify drilling fluid |
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Cited By (3)
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| WO2016119516A1 (en) * | 2015-01-30 | 2016-08-04 | 张劲南 | Novel slurry solid phase control system and process |
| CN106761497A (en) * | 2016-09-13 | 2017-05-31 | 谭艳儒 | Landwaste separator |
| CN109505544A (en) * | 2017-09-15 | 2019-03-22 | 中国石油天然气股份有限公司 | Processing device for drilling mixed fluid |
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| CN109505544A (en) * | 2017-09-15 | 2019-03-22 | 中国石油天然气股份有限公司 | Processing device for drilling mixed fluid |
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Application publication date: 20140924 |