GESTUURDE BORINGEN

1
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2
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• ???????????? ????? ???????????? ??? ?????? ?
  ????? A ?? ????? B
• ???????????? ??? ???? ???????, ?????????? ??
  ???????, ?????? ??????, ??????????? ???? ?
  ??????????
• Make room to install the product
• Compacting technique, compact soils (dry / wet)
• Transport technique, remove soils (wet)
• Turn a non controllable condition in to a
  controllable condition
• ????? gt Fluid with low of sand
• ????? gt Fluid with low of clay
• ????? gt Fluid with low of rock
• ??? ?? ???????? ?????? ?????? !!!

3
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????????, ??????, ?/? ??????, ???????? ? ?.?.
????????? ????? ??? ????????????? ? ???-???????
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4
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• ????? ?? 2400 ??????
• ??????? ???? ?? 1400 ??
• ????????? ???????????, ?????, ???????? ???? ??
  ??- ??? ???????? ?????????, ??????, ???,
  ????????????? ???????, ????? ?? ??????
  ????????????,
• ?????? ??????? ? ?????????? ?? ??????? ????????
  ?????

5
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6
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• ???????? ? ?????????????
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• ??????????? ?? ????????? ??????????? ?? ????
  ??????? ??????

??????? ??????? ?????? ???? ????? ?????? ??????
!!!!!
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Flexibility

• To avoid difficulties during the entire process
  it is recommended to drill in a smooth line from
  A to B.
• ???????? ??????? stresses on the rods, tooling
  and navigation system
• ?????????? stresses on the rods, tooling and
  product
• Additional stresses on the machine
• Although the technology gives us a high
  flexibility in steering we are not really
  interested in it!

8
????????? ??????????????????

• 1. ??????????
• - 40 50 ?????? ?????? ??????!
• 2. ???????? ???????
• 3. ???????????????
• ??????????
• 4. ???????? ????????????

9
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10
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• ?????? ????? ??.?.
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11
??????? ????????? ? ??????????????

• ??????? ?????????
• ???????????? ?????????
• ??????? ???????????
• ??????? ??????
• ??????? ??????????????
• ??????? ???????
• ??????
• ???????????
• ??????? ???????
• ??????????? (Walk over)
• ?????????
• Only used for large projects

12
??????????? ????????? !

• ????? gt ?????? ????????????? ? ?????????????
• ??????? gt ???????? ??????
• ???????? gt ?????????????????? ??????
  ????????????? ????????

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HDD pullback distance capabilityEstimated
pullback force
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HDD fluid assisted transport

• Main function Turn a uncontrollable formation
  in to a controllable formation
• ????? gt Fluid with a low percentage of sand
• ????? gt Fluid with a low percentage of clay
• ????? gt Fluid with a low percentage of rock

• ?????????? ???????? ????????
• ??????????????? ?????? ??????
• ???????? ?????????? ??????
• ????????? ?????? ????????
• ??????
• ???????? ???????? ? ????????
• ?????????? (???????????)

15
??? ?????????? ? ??????? ?????? ?
B ??????? ??????? S ????? R ??????? R B
S

• ??? ????????? ??????? ?? ?????? ??????? ????????
  !
• ???????? ?????? ???????????????? ??????
  ???????????? ?????????? ?????? !
• ??????? ??????? (100) ??????? (75 )
  ????? (25)
• ??? ??????? ?3 ????????? 3 ?3 ???????? ????????
• ????????? ??????? ?????? ????? ????????????????

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Drilling fluid requirements

• Tixotropic behavior
• Fluid when in motion
• Solid when not in motion
• Transport of the cuttings (viscosity)
• Prevent fluid loss in the formation (filter cake)
• Unstable formation
• Less fluid for transport
• Hole stabilization
• Keep the cuttings in suspension (gel strength)
• Cutting encapsuling
• Prevent clay balling

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Drilling with water

• NO Tixotropic behavior
• Fluid when in motion
• Fluid when not in motion
• NO Transport of the cuttings (no viscosity)
• Fluid loss in the formation (no filter cake)
• Hole collapse
• No transport
• No hole stabilization
• No suspension (no gel strength)
• No cutting encapsuling
• Clay balling

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????

• Base component
• Common Contaminants Limits
• Calcium (hardness) 150 ppm
• Chlorides (salt) 500 ppm
• Chlorine (municipal water) 100 ppm
• Treatment
• Calcium Soda Ash at 0.5-2 lb/100 gallons
  (0.6-2.4 kg /1000 litres)
• Chlorides If high levels exist seek out new
  water source
• Chlorine Water can be aerated and contaminant
  will be released to the atmosphere

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Sodium/Wyoming Bentonite

1. High swelling clay.
2. Ability to absorb large quantities of water.
3. Composed of many stacks of platelets like a stack
   of cards.
4. Expands up to 20 times its volume.
5. One inch high contains between 35,000-40,000
   layers (stresses good mixing).

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????????
MONOMER

• Filtration Control Polymers
• Reduces filtration rate and invasion
• Improves composition and characteristics of
  filtercake (borehole stability)
• Shale and Clay Stabilizers
• Encapsulates reactive shale and clay
• Coats exposed formations

MONOMER
MONOMER
JOINED TOGETHER TO FORM A LINEAR POLYMER
MONOMER
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?????????, ?????? ? ??????? ???????????
22
???? ??????? ? ????

• ??????? ??????? (????????? ?????)
• ?????
• ??????
• ?????

• ?????? ??????? (??????? ?????)
• ?????
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23
Soil/rock properties

• ?????
• Strength Stiffness
• Grain size, particle size distribution

• ?????
• Strength Hardness
• Abrasiveness - Silica Content
• Texture - Grain Size
• Density - Porosity
• Amount of Weathering

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Cutting techniques

• Target create particles that can be
  removed/transported
• Scraping
• Soft conditions/rock
• Point load
• Soft, medium, hard rock
• Impact
• Medium, hard, very hard rock

25
???????? ??????? ???????

• Different tools for different ground conditions
• For maximum performance per condition
• RATT single drill head for all ground conditions
• Capable to drill/steer through all ground
  conditions, can be slower then other tooling in
  various ground conditions

26
????????????? ??????? ??????? ??? ???
????????????? ?????? ?????
Trihawk
??????????? ??????? ??????? ? ???????
????
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HDD Cutting edge, Point load
D18X22 Switserland
Rock
RATT
Backfill Soil mix
Rock
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TRI Cone bits
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Navigation walk over !

• ????????? ?????????
• ???????
• ?????
• ???????????
• ????????? ?? ?????
• ???????????
• ??????? ???????
• ???????????
• ??????? 5
• - ????? ?0.1- 1
• - ?? ????? 30
• (Eclipse 15)
• ??????
• ?????????
• ????????

• ?????????? ?????
• ????????? ? ???????? lt 500 m

• ???????????????? ??????l
• ???????????? ??????? lt 40 m

??????????? ??? ????????? ????
30
??????????

• ??????????????? ??????????
• ??????????? ??????????
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31
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• ????? ???????? gt 3x ????? ??????

• ??????????? ???????????
• ?????????? ?????????? ??????
• ????? ???????? ?????? ???????????? ??????

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Trenchless Cutting edge, Reamers
Cutter reamers Rock reamers Compaction reamers
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?????????? ? ??????????
34
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Soil factor
??????????? ???????? ???????? ??????? ?? ????
?????? 1 gt 3 ??? ?? ???????? ?????? (?????,
??????, ?????) 4 gt 10 ??? ???????? ??????
(?????, ????????, ?????? ?????)
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36
Jobsite equipment overview
??????? ?????????
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Slurry pump
????????????? ?????
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???????

• Setup without recycling
• Setup with recycling (entry)
• Setup with recycling (exit)

?????????
??????? ???????????
37
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• ????????? ????????? ????????
• ??????????
• ?????????? ?? ?????
• ????????? ??????????

38
???????????? ???????

• ??????????? ???????????
• Atlas boreplanner
• ??????? ???????? Fieldcalc
• ????????

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Questions?????