Singapore - Trenchless International
Singapore - Trenchless International
Singapore - Trenchless International
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dRILLING eqUIPMeNt<br />
October 2010 - <strong>Trenchless</strong> <strong>International</strong><br />
52<br />
hdd gets bigger<br />
Completing the model range of the S Series, the new Terra-Jet 8522 S is the largest<br />
HDD machine ever built by Terra AG and was exhibited successfully at BAUMA, Munich.<br />
The machine is characterised by high power and drilling fluid volume.<br />
all you need in the driller's seat<br />
the Premium model of the terra-Jet<br />
8522 s is equipped with a comfortable<br />
driver’s cabin, which sets new standards.<br />
the cabin has all-round tinted glazing,<br />
with the machine side being glazed in a<br />
single uninterrupted panel. this allows the<br />
operator to see every detail of the drilling<br />
machine.<br />
Large windscreen wipers with jets clean<br />
the front and right panels. Additionally the<br />
drilling fluid pressure inside the drill rods<br />
is automatically released just before each<br />
drill rod change, preventing bentonite from<br />
being splashed onto the glazing.<br />
the on-board computer with a large<br />
10.4 inch touch screen displays the vital<br />
information needed at any instance. It<br />
updates and saves all relevant machine<br />
data every two seconds, updating the<br />
operator on the essential drilling elements.<br />
this data is essential for efficient service<br />
diagnostics.<br />
Additionally a bore log can be printed<br />
for each bore as regulated in the German<br />
specification DVGW 321.<br />
Sitting comfortably<br />
the operator sits in a comfortable operator’s<br />
seat, which can be adjusted to suit the<br />
body shape and weight of the operator.<br />
the operator’s cab is wide, allowing the<br />
seat to rotate 180 degrees. the operator<br />
can drill looking in the drilling direction, or<br />
can rotate the seat to be at right angles<br />
to the drill and observe every detail of the<br />
drilling machine.<br />
Machine technology<br />
the terra-Jet 8522 s may drill directional<br />
bores up to 400 m long and 1,000 mm in<br />
diameter depending on ground conditions.<br />
torque and pullback force are produced<br />
by separate hydraulic circuits allowing the<br />
maximum torque of 8,500 Nm and the<br />
maximum pullback force of 220 kN to be<br />
used simultaneously under full load.<br />
Separate bentonite chamber<br />
the drilling fluid volume is 400 litre per<br />
minute. the mixing system which mixes<br />
the bentonite into the drilling fluid via<br />
an injector (venture hopper) is on board<br />
the HDD machine. this patented system<br />
removes the need for an extra mixing system<br />
and a second engine.<br />
the bentonite high pressure pump and<br />
the mixing pump are placed in a separate<br />
chamber between the driver’s cabin and<br />
engine chamber. this aesthetically pleasing<br />
solution ensures that no bentonite<br />
touches hydraulic components.<br />
automatic drilling<br />
the machine is equipped with a second<br />
generation automatic drilling and backreaming<br />
system (ADBs). this patented<br />
system automatically adjusts the working<br />
speed of the drill to suite the ground<br />
conditions.<br />
In soft ground the drill operates at maximum<br />
speed, in hard ground slowly. this<br />
allows the operator to operate the drill at<br />
maximum efficiency in a controlled and<br />
relaxed manner and prevents the drill rods<br />
and drilling tools from being overloaded.<br />
During the pilot bore the ADBs controls the<br />
thrust force. If the drill head hits an unexpected<br />
obstacle, the ADBs stops the drilling<br />
speed immediately and drills very slowly<br />
through the obstacle – all automatically!<br />
Another new feature is the automatic drill<br />
rod greasing function, which is undertaken<br />
during each drill rod change by an electrically<br />
driven grease press attached to the<br />
driving saddle.<br />
New operator’s concept<br />
the drill operator drives and operates the<br />
HDD machine using the two multifunctional<br />
joysticks installed in the left and right armrests<br />
of the operator’s seat. Driving using<br />
the joysticks allows instantaneous control<br />
and smooth movement of the terra-Jet.<br />
Promoting trenchless in Ukraine<br />
The Ukraine Association for<br />
Modern <strong>Trenchless</strong> Technology<br />
held a very successful event in<br />
Odessa on 10 September.<br />
The caLL fOr abstracts is now open.<br />
Prospective presenters are invited to submit<br />
a 300-word abstract in English outlining the<br />
scope of their paper and the principal points<br />
of benefit to the trenchless industry.<br />
the abstracts must be submitted to<br />
info@istt.com by 15 December 2010.<br />
chaIrMaN VIcTOr PrOkOPchuck<br />
and EsC member Olga Martinyuk welcomed<br />
Istt Chairman Dec Downey who<br />
gave a keynote address. some 93 delegates<br />
including 15–20 student members listened<br />
avidly to 24 excellent papers, primarily on<br />
new construction by horizontal directional<br />
drilling including contributions from local<br />
distributors for Vermeer, Ditchwitch and DCI.<br />
the merits of locally produced and<br />
imported bentonite additive and mud materials<br />
were enthusiastically discussed and<br />
No-dig Berlin<br />
latest news!<br />
the event culminated with a buffet for all<br />
and a dinner for the Ukraine Association<br />
Board where the discussion continued the<br />
lively debate.<br />
Dr Downey commented that it was good<br />
to see such a young society functioning well<br />
and encouraging healthy debate and he<br />
hoped that in future years there would be<br />
contributions from international contributors<br />
in the rehabilitation sector. On the second<br />
day delegates toured local manufacturing<br />
facilities, concluding their get together.<br />
The 2011 <strong>International</strong> No-Dig will be held in conjunction with<br />
WASSER Berlin <strong>International</strong> 2011, on 2–5 May at Exhibition<br />
Grounds Messe Berlin.<br />
Please visit the following website for more<br />
information: www.nodigberlin2011.com<br />
Furthermore the German society for<br />
trenchless technology (Gstt) has<br />
developed a special offer for Corporate<br />
Members of Affiliated societies to exhibit<br />
at No-Dig Berlin 2011.<br />
turkey joins the Istt<br />
The ISTT has recently welcomed the Turkish Society to the organisation.<br />
yaSIN TOruN, chaIrMaN of the newly<br />
formed turkish society for Infrastructure<br />
and trenchless technologies and Dec<br />
Downey Istt Chairman signed an affiliation<br />
agreement in a Istt registered<br />
office in Belgrave square, London<br />
on 21 september 2010 (pictured). Also<br />
attending the signing was Prof Dr Fevzi<br />
Yilmaz of sakarya University, Norman<br />
Howell, <strong>International</strong> Director UKstt<br />
and Ahmet Gulec, Vice Chairman of the<br />
turkish society.<br />
Corporate Members are entitled to exhibit<br />
at the “Pavilion Pipeline Construction”,<br />
which is much cheaper than exhibiting<br />
alone in the standard area.<br />
For more information please contact<br />
Ms Dagmar Eichhorn from Gstt at<br />
eichhorn@gstt.de<br />
Istt News<br />
October 2010 - <strong>Trenchless</strong> <strong>International</strong> 53