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

Determine the weight of solids mixed in the suspension, In a hydrometer ana...

In a hydrometer analysis, the corrected hydrometer reading in a 1000 ml uniform soil suspension at the start of sedimentation was 28. After a lapse of 30 minutes, the corrected hyd

Explain the stopping sight distance, Explain the Stopping Sight Distance ...

Explain the Stopping Sight Distance Stopping Sight Distance Is the Sum of Two Distances (1) The distance traversed by the vehicle from the instant the driver sights an objec

Strength - aggregate impact test, Strength: The strength of aggregate...

Strength: The strength of aggregates is determined from one of the three tests : Aggregate Impact Test In which the aggregates in a mould are subjected to impact caus

Determine the magnetic declination at a place, Example : Determine th...

Example : Determine the declination at a place, if at noon the magnetic bearing to the sun is (a) 358° (b) 185° Solution: (a) Referring to given figure (a) since the ma

Effect of prestress in an reinforced cantilever beam, Effect of prestress i...

Effect of prestress in an reinforced cantilever beam The effect of prestress in an ordinary reinforced cantilever beam and a prestressed concrete (PSC) beam. When no load is pr

Depth of boring for multi-storeyed building, Depth of Boring  for Multi-st...

Depth of Boring  for Multi-storeyed Building Peck has recommended that first drill hole is to be made up to depth at which the presence of a thick layer of soft clay with a hig

Determine the limit states of serviceability, Limit States of Serviceabilit...

Limit States of Serviceability These are those limit states which point out to the inability of a structure or a structural component in functioning properly as per the intende

Ocf, location of hydrolic jump

location of hydrolic jump

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