CN108086908A - The application method of mud in the construction of directional drilling crossing river - Google Patents
The application method of mud in the construction of directional drilling crossing river Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000010276 construction Methods 0.000 title claims description 32
- 239000002689 soil Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000011010 flushing procedure Methods 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000007924 injection Substances 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 5
- 239000002002 slurry Substances 0.000 claims description 29
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 210000002445 nipple Anatomy 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 230000000994 depressogenic effect Effects 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 235000017550 sodium carbonate Nutrition 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 230000001629 suppression Effects 0.000 claims 1
- 239000007787 solid Substances 0.000 abstract description 4
- 239000000725 suspension Substances 0.000 abstract description 4
- 238000005461 lubrication Methods 0.000 abstract description 3
- 230000001151 other effect Effects 0.000 abstract description 3
- 238000005520 cutting process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/26—Drilling without earth removal, e.g. with self-propelled burrowing devices
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
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- Mining & Mineral Resources (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
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- Dispersion Chemistry (AREA)
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Abstract
The application method of mud in constructing the invention discloses a kind of directional drilling crossing river, including：Mud is prepared according to formation condition, the diameter of crossing pipeline and length, selects suitable mud-making material；During traversing pipe line, the flow velocity for dragging fltting speed and mud in different soil is returned according to guide digging, reaming, hole flushing, pipeline, computation of mud and drill bit reach the different soil required time, in the mud injection hole for needing different soil in setting time point, in the mud injection mud circulatory pool returned from drilling, mud is back to use drilling after processing.The present invention improves the suspension of mud, carrying, lubrication, solid hole, leak stopping and other effects, the generation for phenomena such as effectively preventing collapse hole, stratum leakage.
Description
Technical field
The present invention relates to a kind of directional drilling crossing river construction technologies, specifically, are related to a kind of directional drilling crossing river and apply
The application method of mud in work.
Background technology
As new process, new technology, new material, new equipment are constantly applied in practice, the construction level of pipeline engineering obtains
Fast development is arrived.Quality creating, safe, short time limit, that pollution-free, construction disturbs residents less, economic and social benefit is good is non-
Excavation technology will be as the main trend of pipeline construction from now on.After China's pipeline construction mainly uses machinery, hand excavation's groove
Directly buried installation is carried out, constructs and is limited by Urban Buried Pipeline Network is intensive, there are significant limitations.
Horizontal directional drilling (HDD) is one of new pipeline (line) laying technology method, can not use excavating load laying
Underground or submarine pipeline (line), underground piping cannot be laid with using excavating load in city or under large-scale natural obstacle by solving
The problem of (line).Horizontal directional drilling is now widely used in the construction of municipal pipeline, oil-gas pipeline.Horizontal directional drilling is using peace
Drilling device loaded on earth's surface to pierce stratum compared with the smaller incidence angle in ground, forms pilot hole, then expands pilot hole
Footpath is to required size and is laid with pipeline (line), has tracking and guide function in construction.
But during directional drilling, due to the improper use of mud, often it is present with collapse hole, mud carrying capacity
The generation of phenomena such as decline, stratum leakage.
The content of the invention
Technical problem solved by the invention is to provide a kind of application method of mud in directional drilling crossing river construction, carries
The high suspension of mud, carrying, lubrication, solid hole, leak stopping and other effects, the generation for phenomena such as effectively preventing collapse hole, stratum leakage.
Technical solution is as follows：
The application method of mud in a kind of directional drilling crossing river construction, including：
Mud is prepared according to formation condition, the diameter of crossing pipeline and length, selects suitable mud-making material；
During traversing pipe line, the fltting speed dragged in different soil is returned according to guide digging, reaming, hole flushing, pipeline
And the flow velocity of mud, computation of mud and drill bit reach the different soil required time, in setting time point by different soil
In the mud injection hole needed, in the mud injection mud circulatory pool returned from drilling, mud is back to use brill after processing
Hole.
Further：The technical performance index of mud includes：Density, viscosity, gel strength, yield value, filter loss, mud cake are thick
Degree allows sand content, pH value.
Further：PH value is controlled between 8~11, and density domination is in 1.02~1.25g/cm3。
Further：Mud-making material includes bentonite, soda ash, burns magnetic and mud conditioner, and mud conditioner includes drop dehydration
Agent, diluent, flocculant, tackifier, inhibitor need to select mud conditioner according to stratum.
Further：Material, proportioning and the technical performance index of mud are walked according to formation condition, bit technique requirement, construction
Suddenly it is adjusted.
Further：Slurry consumption is determined according to counter bore diameter, drillable length, reaming number, hole leakage situation, according to public affairs
Formula V=k π D2L/4 determines that V represents drilling slurry dosage in formula；D represents whole bore dia；L represents drillable length；K represents ratio
Coefficient, value range are 3~5.
Further：The pump amount of slush pump is determined according to formula Q=AVd/We during construction, and Q is the pump amount of slush pump in formula；A
For drill bit ground floor area；Vd is rate of penetration；We is that the maximum cobalt allowed considers percentage composition to be worth doing.
Further：During guide digging, suitable sodium hydroxide is added in mud, the pH value of mud is made to adjust to 9；
The variation of soil layer is judged by the variation of drilling machine torque and pulling force during guide digging, so as to adjust the glutinous of mud
Degree, pH value and flow velocity；In reaming procedure, the viscosity of mud is maintained at 50s or so first, then by mud interval mud
PH value is adjusted to 10, then the positive electricity agent of addition 3%~5% and pour-point depressant into mud；It, will when reamer will reach sand bed section
The pH value of mud is adjusted to 9, and addition 2%~4% takes husky agent in mud；When reamer will reach horizontal segment section, in mud
1% cellulose is added in slurry；When reamer will reach inclination section section, mud viscosity is 50；During hole flushing, mud
Viscosity be maintained at more than 55s, 2% is added in mud and takes husky agent, during hole flushing pH is maintained at 9；Pipeline returns and is pulled through journey
In, the viscosity of mud is maintained at 50s, and pH value is maintained at 9.
Further：During guide digging, slurry situation is returned according to pilot hole, is increased between 500 meters -700 meters in drilling rod
Slurry pipe nipple is mended, the distance for mending slurry pipe nipple is adjusted according to slurry situation is returned with drilling machine torque；It mends slurry pipe nipple and is equipped with water hole, mud passes through
Water hole is injected into pilot hole, makes in pilot hole to ensure drilling rod in pilot hole all there are one mud jet port every one section
Torque will not increase.
Further：In reaming procedure, the concentration and mud pressure of Real Time Observation mud make the pressure in mud device to hole big
Pressure in hole wall device to hole.
Compared with prior art, the technology of the present invention effect includes：
The present invention by adjusting mud property and Optimizing construction technique, improve the suspension of mud, carrying, lubrication, solid hole,
Leak stopping and other effects, effectively prevent collapse hole, stratum leakage phenomena such as generation.It is appropriate to increase polymer content, improve mud
It suspends and solid hole ability；Mud rheological agent is added in, mud is made to keep good mobility at higher viscosities, improves and carries energy
Power reduces viscous force；Reduce frictional resistance, reduce frictional resistance and torque, good sealing process is played to top sand.
The use of the present invention, the brill pilot hole stage can portal sundries carrying in hole outside, while maintain the stabilization of hole wall, subtract
Few propelling resistance；Pre- reaming stage, mud have good retaining wall effect, improve mud carrying capacity；Reaming returns and drags stage mud
Slurry has good retaining capacity.
On the premise of Directional Drilling construction requirement is met, mud is thicker, and there will be no enough between mud particle and particle
More Free waters, mud at this time are actually a kind of plastic and flow regime mixture, and during grout, the mixture is from orientation
By by adjusting slip consistency, when making it by the particulate interspaces of the soil body above in the particulate interspaces of the drilling soil body above
So as to hindered and constraint, can play the role of preventing grout.
Description of the drawings
Fig. 1 is the location diagram in pipeline and river in the present invention；
Fig. 2 is the sectional view of Pipeline Crossing by Horizontal Directional Drilling river circuit in the present invention.
Specific embodiment
It elaborates below with reference to example embodiment to technical solution of the present invention.However, example embodiment can
Implement in a variety of forms, and be not understood as limited to embodiment set forth herein；On the contrary, it theses embodiments are provided so that
The design of example embodiment more comprehensively and completely, and is comprehensively communicated to those skilled in the art by the present invention.
As shown in Figure 1, it is the location diagram that track and river are passed through in the present invention；As shown in Fig. 2, it is water in the present invention
The sectional view of flat directional drilling crossing river circuit.
The lower section that track 2 is located at river 1 and ground is passed through, for A points to bury a little, F points are unearthed point, and A-C and D-F are deflecting
Section, C-D are horizontal segment, crossing length 2600m.A-C sections be farinose argillic horizon, C-D section be powder soil horizon, D-E sections be sand bed, E-
F sections are mud.
Traversing pipe line process mainly include guide digging, reaming, hole flushing, return drag four processes, directional drilling crossing river is applied
The application method of mud is applied in four processes of traversing pipe line process in work.
Step 1：Mud is prepared according to formation condition, the diameter of crossing pipeline and length, selects suitable mud-making material；
The design of mud includes following content：
1st, density, viscosity, gel strength, yield value, filter loss, cake thickness, permission sand content, pH value of mud etc. is determined
Technical performance index.
Live mud pH value general control is between 8~11.
The performance parameter of mud should be met the following requirements：
(1) density should be controlled in 1.02~1.25g/cm3, available standards mud balance or other methods are measured.
The appropriate proportion of drilling slurry can prevent from missing and maintaining the stabilization of hole wall.
(2) ability of the bigger suspension drilling cuttings of the viscosity of mud is stronger, but can increase the flow resistance of mud Xun Huan.Mud
Viscosity is preferably measured with Marsh funnel.The viscosity of mud is determined according to geological condition by geneva viscosity gauge (s).
2nd, the match ratio of mud-making material.
Mud-making material includes：Bentonite, soda ash burn magnetic and all kinds of mud conditioners, mud conditioner include fluid loss agent,
Diluent, flocculant, tackifier, inhibitor etc. should need to select suitable mud conditioner according to stratum.
Material, proportioning and the technical performance index of mud should meet construction requirement, and be wanted according to formation condition, bit technique
It asks, construction procedure is adjusted.
3rd, slurrying.
Mud is prepared in Special agitating container or stirring pool, and is used by mud circulatory pool；It is returned from drilling
Mud reuse after processing, remaining mud should be dealt carefully with.
4th, mud Xun Huan, purification, management measure are formulated.
The pressure and flow of mud should be respectively controlled by construction procedure.
(1) the fluid loss control of mud.
The fluid loss on common stratum is preferably controlled in 10~15ml/30min, and water sensitivity easily caves in suitable with scall fluid loss
Control is in below 5ml/30min.Fluid loss should use the vapour-pressure type fluid loss instrument of standard to measure.
(2) sand content through slurry purifying equipment treated mud should be less than 0.5%, be measured with sand content instrument.
(3) mud materials dosage calculates.
The calculating of mud materials dosage includes：Mud total volume, bentonite consumption, water consumption with slurry and mud conditioner are used
Amount.Drilling slurry dosage calculating should consider final counter bore diameter, drillable length, reaming number, hole leakage situation etc. because
Element can be calculated as follows：
V=k π D2L/4, V represents drilling slurry dosage (m in formula3)；D represents whole bore dia (m)；L represents drillable length
(m)；K represents proportionality coefficient, and value range is 3~5, generally takes 3.
(4) the pump amount of slush pump should be able to meet construction requirement when constructing, and can be calculated as follows：Q=AVd/We, Q is in formula
Pump amount (the m of slush pump3/min)；A is drill bit ground floor area (m2)；Vd is rate of penetration (/min)；We is that the maximum cobalt allowed is considered to be worth doing
Percentage composition, under normal circumstances, cutting content is no more than 10%.
The rotating speed of slush pump be 1500r/min, mud pressure 1.5-2.0MPa, mud speed rate 70-90m3/h, soil property
Layer is different, and the flow velocity of mud is also different, and hard soil layer is run into during guide digging can suitably increase flow velocity.
Pump amount is the important performance parameter of slush pump.When one timing of bit size and rate of penetration, generated in the unit interval
Coal powder quantity of bore be certain.At this point, the content of drilling cuttings is determined by pump amount in mud：Then cutting content is few greatly for pump amount, conversely, pump amount
Small then cutting content is big.
Step 2：During traversing pipe line, returned according to guide digging, reaming, hole flushing, pipeline and drag pushing away in different soil
Into speed and the flow velocity of mud, computation of mud and drill bit reach the different soil required time, will not in setting time point
In the mud injection hole needed with soil layer, in the mud injection mud circulatory pool returned from drilling, mud returns after processing
Use drilling.
It bores pilot hole demands the silt carrying in hole is portalled outside as far as possible, while maintains the stabilization of hole wall, reduce
Propelling resistance；Pre- reaming demands mud has good retaining wall effect, and formation damage improves mud carrying capacity；Expand
Hole, which is returned, drags demands mud to have good retaining wall, carrying capacity, while also good lubricating ability, reduces frictional resistance and torsion
Square.
(1) guide digging：During guide digging, suitable sodium hydroxide is added in mud, makes the pH value tune of mud
It saves to 9, generally using the pH of pH test paper measure mud.
The variation of soil layer is judged by the variation of drilling machine torque and pulling force during guide digging, so as to adjust mud
Viscosity, pH value and the flow velocity of slurry.
(ingredient of mud is water and bentonite to A-C sections of mud, and bentonite is 5% or so in the ratio of mud, and mud sticks
Degree is measured using mud viscosimeter, that is, Marsh funnel) viscosity be 50s；The viscosity of C-D sections of mud is 45s；D-E sections of mud it is glutinous
It spends for 55s；The viscosity of E-F sections of mud is 50s.
In pilot hole drilling process, because being influenced be subject to traverse distance, traverse distance is longer, and influence is bigger, and mud is not
It can be returned along established pilot hole, drilling rod torque can be caused to increase, the serious consequence of pilot hole failure can be caused when serious.
Concrete measure is
A) in work progress is oriented to, slurry situation is returned according to pilot hole, it is short often to creep into 600 meters or so increases, one benefit slurry
Section, the distance for increasing benefit slurry pipe nipple can be adjusted suitably according to slurry situation is returned with drilling machine torque, but minimum is not easy less than 500 meters, most
It is not easy more than 700 meters greatly.
B) water hole of a diameter of 4mm, mud can be noted by the way that water hole is continual into pilot hole there are one mending on slurry pipe nipple
Enter, make in pilot hole to ensure that torque of the drilling rod in pilot hole will not increase all there are one mud jet port every one section.
C) perforate on benefit slurry pipe nipple is not easy too small or too big, is advisable under normal circumstances with 3.5mm~5.5mm, too conference
The mud amount at starter is caused to reduce, it is too small to be blocked because of the impurity inside mud.
Guide digging demands as far as possible portal the carrying of the drilling cuttings such as the silt in hole outside, and hole wall is maintained to stablize.
The drilling starting stage will be such that rate of penetration controls in 3m/min, increase the discharge capacity of mud, the drilling cuttings in hole is made fully to be carried out
Come, ensure that annular space is unimpeded, lay a good foundation for follow-up drilling.
(2) reaming：In reaming procedure, the viscosity of mud is maintained at 50s or so first, then by F-E sections of mud
PH value is adjusted to 10, then the positive electricity agent of addition 3%~5% and pour-point depressant into mud；It, will when reamer will reach E-D sections
The pH value of mud is adjusted to 9, and husky agent is taken in addition 2%~4% in mud in advance；When reamer will reach D-C sections, in advance
1% cellulose is added in mud；When reamer will reach C-A sections, it is 50 or so that need to only ensure mud viscosity
(E-A sections of pH value is always held at 9 or so).
In order to ensure not collapse hole and hole-enlarging hole-forming rate, in reaming procedure, the concentration and mud pressure of Real Time Observation mud,
The pressure that the pressure in mud device to hole is made to be greater than in hole wall device to hole.According to geological condition, torque and pulling force size in reaming
It determines the distribution of geology difference, counts the air line distance of torque and pulling force size so as to draw the sticky of each layer of configuration mud
Degree, live mud are detected using Marsh funnel.Stringent control concentration of hydraulic mixture, ensures that concentration is not less than 85s.
(3) hole flushing：During hole flushing, the viscosity of mud is maintained at more than 55s, addition 2% takes sand in mud
Agent can (pH value be always held at 9 or so during entire hole flushing).
(4) pipeline is returned and dragged：During pipeline time drags, the viscosity of mud is maintained at 50s or so, and it is left that pH value is maintained at 9
It is right.
Stable mud Xun Huan is effective basis for excluding drilling cuttings, stablizing boring pressure, hole wall being maintained to stablize, and maintains construction
Mud Xun Huan can significantly avoid the accidents such as drilling cuttings accumulation, burying in the process.The mud returned out of drilling is sufficiently stirred, is passed through
Sedimentation basin or slurry purifying equipment, which handle and adjust rear, repeats utilization.
Should drilling hydraulic coupling and flow be selected according to formation condition in Directional Drilling work progress, and keep stable mud
Stream.If need to interrupt drilling for a long time for some reason, since mud can be leaked constantly to stratum, and drilling tool rests on bottom hole for a long time
Easily trigger engineering accident, new mud and movable drilling tool should be periodically supplemented into hole, avoids bit freezing.
Term used herein is explanation and term exemplary, and not restrictive.Since the present invention can be with a variety of
Form specific implementation without departing from the spiritual or substantive of invention, it should therefore be appreciated that above-described embodiment be not limited to it is any foregoing
Details, and should widely being explained in the spirit and scope that appended claims are limited, thus fall into claim or its etc.
Whole variations and remodeling in the range of effect all should be appended claims and covered.
Claims (10)
1. the application method of mud in a kind of directional drilling crossing river construction, including：
Mud is prepared according to formation condition, the diameter of crossing pipeline and length, selects suitable mud-making material；
During traversing pipe line, according to guide digging, reaming, hole flushing, pipeline return drag different soil fltting speed and
The flow velocity of mud, computation of mud and drill bit reach the different soil required time, need different soil in setting time point
Mud injection hole in, in the mud that is returned from drilling injection mud circulatory pool, mud is back to use drilling after processing.
2. the application method of mud in directional drilling crossing river construction as described in claim 1, it is characterised in that：The technology of mud
Performance indicator includes：Density, viscosity, gel strength, yield value, filter loss, cake thickness, permission sand content, pH value.
3. the application method of mud in directional drilling crossing river construction as claimed in claim 2, it is characterised in that：PH value control exists
Between 8~11, density domination is in 1.02~1.25g/cm3。
4. the application method of mud in directional drilling crossing river construction as described in claim 1, it is characterised in that：Mud-making material bag
It includes bentonite, soda ash, burn magnetic and mud conditioner, mud conditioner includes fluid loss agent, diluent, flocculant, tackifier, suppression
Preparation needs to select mud conditioner according to stratum.
5. the application method of mud in directional drilling crossing river construction as described in claim 1, it is characterised in that：The material of mud
Material, proportioning and technical performance index are adjusted according to formation condition, bit technique requirement, construction procedure.
6. the application method of mud in directional drilling crossing river construction as described in claim 1, it is characterised in that：Slurry consumption root
It is determined according to counter bore diameter, drillable length, reaming number, hole leakage situation, according to formula V=k π D2L/4 determines, V generations in formula
Table drilling slurry dosage；D represents whole bore dia；L represents drillable length；K represents proportionality coefficient, and value range is 3~5.
7. the application method of mud in directional drilling crossing river construction as described in claim 1, it is characterised in that：Mud during construction
The pump amount of pump determines that Q is the pump amount of slush pump in formula according to formula Q=AVd/We；A is drill bit ground floor area；Vd is drilling speed
Degree；We is that the maximum cobalt allowed considers percentage composition to be worth doing.
8. the application method of mud in directional drilling crossing river construction as claimed in claim 3, it is characterised in that：Guide digging mistake
Cheng Zhong adds suitable sodium hydroxide in mud, and the pH value of mud is made to adjust to 9；Pass through drilling machine during guide digging
The variation for changing to judge soil layer of torque and pulling force, so as to adjust the viscosity of mud, pH value and flow velocity；In reaming procedure
In, the viscosity of mud is maintained at 50s or so first, the pH value of mud interval mud is then adjusted to 10, then is added into mud
Add 3%~5% positive electricity agent and pour-point depressant；When reamer will reach sand bed section, the pH value of mud is adjusted to 9, in mud
Husky agent is taken in middle addition 2%~4%；When reamer will reach horizontal segment section, 1% cellulose is added in mud；When
When reamer will reach inclination section section, mud viscosity is 50；During hole flushing, the viscosity of mud is maintained at more than 55s,
Husky agent is taken in addition 2% in mud, and during hole flushing pH is maintained at 9；During pipeline time drags, the viscosity of mud is maintained at 50s,
PH value is maintained at 9.
9. the application method of mud in directional drilling crossing river construction as described in claim 1, it is characterised in that：In guide digging
In the process, slurry situation is returned according to pilot hole, increases between 500 meters -700 meters in drilling rod and mend slurry pipe nipple, mend the distance root of slurry pipe nipple
It is adjusted according to slurry situation is returned with drilling machine torque；It mends slurry pipe nipple and is equipped with water hole, mud is injected by water hole into pilot hole, makes guiding
Ensure that torque of the drilling rod in pilot hole will not increase all there are one mud jet port every one section in hole.
10. the application method of mud in directional drilling crossing river construction as described in claim 1, it is characterised in that：In reaming
Cheng Zhong, the concentration and mud pressure of Real Time Observation mud make the pressure in mud device to hole be more than the pressure in hole wall device to hole.
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| CN114165162A (en) * | 2021-11-30 | 2022-03-11 | 中铁八局集团第一工程有限公司 | Construction method of ultra-long downward-penetrating directional drilling and pipe-pulling method |
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| CN110922949A (en) * | 2019-10-28 | 2020-03-27 | 北京中煤矿山工程有限公司 | Low specific gravity and high performance retaining wall slurry material for long horizontal freezing drilling in muddy clay and preparation method thereof |
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| CN112103852B (en) * | 2020-07-02 | 2021-12-10 | 广东电网有限责任公司佛山供电局 | Method for crossing river channel and laying cable by using horizontal directional drilling technology |
| CN114165162A (en) * | 2021-11-30 | 2022-03-11 | 中铁八局集团第一工程有限公司 | Construction method of ultra-long downward-penetrating directional drilling and pipe-pulling method |
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