ECI supplied two 30 foot drill-collars, a downhole jet-bit drilling assembly, and oilfield drillpipe that would also serve as the conduit when the drilling was completed. A drilling rig from Drilex Environmental Services was utilized to perform the drilling procedure. CBC-Welnav, Tustin, CA, supplied lateral navigation equipment, Accu-Tracker surface locator, and directional drilling engineers. The scope of the project was to directionally drill two crossings via trenchless technology and leave a 5 in. O.D. conduit in place for fiber optic transmission cables. The crossings were to share the same exit point into a planned manhole. By using computer software developed by CBC-Welnay, ECI planned the directional crossing profiles. Profile #1 called for a basic approach: 1) Use a slant rig; 2) Directionally drill dow & horizontal; 3) Come up and out of the ground in a straight line from entry point. Profile #2, however, was a lot more innovative and optimistic. It required a grade change from 12 degrees to +10 degrees with a 130 degree lateral turn within 10000 lineal ft. of the drilled hold. The complexity of this project was in the drilling of profile #2. The jet-bit had to be navigated in a three dimensional plane. This type of project has only been approached by oilfield drilling, where no exits are involved and targets are much larger. Therefore this project was unique for two reasons: 1) 130 degree lateral turn; 2) accuracy of the drilled path to target. Crossings: The first phase of the project began October 1st. and completed by October 3rd. The drilling operation under Highway 91 South was routine and all systems performed as expected. The drilled path was installed at a depth of 40 ft. The jet-bit exited on target and the drillpipe was left in place as a conduit for a total length of 519 ft. On Oct. 4th. the drill rig was mobilized and moved to the second drill site. Profile #2 was reviewed. Practical application of drilling a 130 degree lateral turn in less than 1000 ft., began to cause both apprehension and enthusiasm. According to the profile, first few joints of drillpipe were actually drilled away from the target. The downhole jet-bit drilling assembly performed as predicted, and the curve began to take shape. The soft formation allowed for a fast penetration rate, but ECI kept the drilling speed and radius of curvature (dog-leg) in check, since profile #2 was approaching the bending limits of the drillpipe and the downhole drilling assembly. On Oct. 9th., the jet-bit exited on target 1000 ft. from the drill rig and joined up with the first phase crossing at the planned manhole site. The casing on both crossings was left in place, as a conduit for four polyethylene inner-ducts, which ECI was bundled and pulled back. ECI planned two crossing project for Connecticut Cable without having any suitable alternatives. The right-of-way, entry, and exit points were pre-determined. The project design was complicated by the state's plan.
Below are some links we recommend:
micro tunneling
gravity fed sewer
middleware tool queuing database publish
subscribe
publish-subscribe multicast
smartsockets messaging structure
smartsockets smartmq flexible
messaging pgm
message oriented middleware infrastructure
software
pgm rmtp-ii distributed programming
xml standard queuing system network IP multicast
jms software distributed
systems
high temperature insulation
heat
customer relationship management crm software
sales automation solutions crm vendors
brand naming identity development tradename
baby products infant carseat gifts stroller
uninterruptible power supply voltage
regulation
santa barbara california ynez goleta
montecito
commodities recommendations futures options
advice
macintosh computers mac imac ibook accessories
macintosh media product mac desktop products
discount mac
santa barbara california ynez lake
cachuma solvang
online sports betting sport gambling
nfl football
teen celebrities
young actors famous people boy bands
lotion skin care glycerin soaps health
beauty gifts
body care
chicago hotels discount rooms online
reservations booking
wholesale fine antique art prints limited
edition contemporary pop posters
louis icart art robert indiana jasper
johns jesus josafa steve kaufman
art liudmila peter max thomas mcknight
pablo picasso
matchmaker teen online dating services
match maker adult personals
pole barn construction builders storage
sheds kit
personals online free dating service
love finder romance
matchmaker match maker free adult personals
viagra online pharmacy order prozac information
xenical celebrex propecia vaniqa
free mortgages low cost home loans quotes
california
hotel paris france european villa rental
small business loans sba lender financing
minority
how pass detox passing drug test screening
urinalysis