Reverse and direct circulation drill drilling in piling, Civil Engineering

Assignment Help:

Q. Reverse and direct circulation drill drilling in piling?

For reverse circulation drilling and direct circulation drilling, major difference in drilling method is connected to the direction of movement of drilling fluid. For direct circulation drilling, drilling fluid is circulated from the drill stem and then flows up annulus between the outside of drill stem and borehole wall. Drilling fluid which carries the drill cuttings flows to the surface and subsequent settlement pits. Pumps are used to lift the cuttings free fluid back to the drill stem. 

For reverse circulation drilling, direction of flow of drilling flow is opposite to that of direct circulation drilling. Drilling fluid flows from the annulus amid the drill stem and hole wall to the drill stem. Drilling fluid is pumped to nearby sump pits where cuttings aredropped and settled.


Related Discussions:- Reverse and direct circulation drill drilling in piling

Find the youngs modulus of the rod, Find the Youngs modulus of the rod: ...

Find the Youngs modulus of the rod: A composite rod is made by joining a copper rod end to end with a second rod of different material but of same cross-section. At 25oC, the

Street originate in the plumbing term street ell, How did street originate ...

How did street originate in the plumbing term street ell? Ans) A "street ell" may have gotten its name due to it describes a 90° fitting particularly useful in tight, street dit

Wooden truss, which truss is suitable for 19*22m span on which mangalore ti...

which truss is suitable for 19*22m span on which mangalore tiles can be placed or shud steel truss be preferred for such span and which 1 is more profitable in rural desiggn...

Slabs, difference between flat slab and normal slab

difference between flat slab and normal slab

Assignment, do u do drawing assignment ( 3rd angle projection)

do u do drawing assignment ( 3rd angle projection)

Hydraulics, what is hydraulic grid line

what is hydraulic grid line

Illustrate the concept of load balancing, Concept of load balancing In ...

Concept of load balancing In above cases of concentric and eccentric pre-stressing, straight tendon profiles (or tendon shapes) along the beam span have been considered. If a t

Explain the design of graded filter, Q. Explain the design of graded filter...

Q. Explain the design of graded filter? Use of graded filter has been traditionally used below the revetment and protection works. The material used in the granular / graded fi

Define electrical tool for underwater inspection of bridge, Define Electric...

Define Electrical tool for underwater inspection of bridge? Electrical equipment like Rebar Scanner for scanning of rebars; underwater sonic and ultrasonic equipment for observ

Seismic joints, is the seismic joints like falling joints ? thanks :)

is the seismic joints like falling joints ? thanks :)

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd