Solids control in directional crossing projects

Separation point of mud solids control equipment comes out from comparing mass velocities of solid phases in different sizes and identical size discharged. Injection velocity, discharge velocity and underflow velocity are needed to test certain equipment. Mass injection velocity can be achieved if injection flow density is multiplied by volume flow rate while mass discharge velocity is given by the multiplication of discharge flow rate by volume flow rate. Apparently, aggregate discharge velocity should be the same with mass injection velocity. Usually, discharge flow is deserted while the rest stays in the mud. Prior to measuring the solid phase in liquid flows, it is primary to see if mass balance equation is well fit, i.e, if both volume velocity and mass velocity reach balance.

Solids control equipment

Horizontal directional crossing are still very young at home and even abroad. However, in recent years, thanks to the substantial development of pipeline directional crossing and large-scale construction of domestic oil & gas pipelines, crossing length and diameter have kept updating the records. Drilling fluids plays an important role in directional crossing projects for its decisive impact on the projects’ effects.

Directional crossing projects demand strong drilling fluids performance:

Drilling fluids, fairly important for directional crossing projects, is a mixture of water, bentonite, additives, etc. with its composition adjustable on actual requirements in the projects. Complex geology and large crossing diameter & length demand strong drilling fluids performance, and, correspondently, different concoction measures to ensure successful crossing.

1. Drilling fluids should have appropriate viscosity and liquidity and good ability to carry drill cuttings. In this way, it can stay suspended at the bottom of borehole and its liquidity can easily carry cuttings back to the ground.

2. Drilling fluids should be able to well protect the inner walls and better stabilize the drill hole wall, especially so for those formations of large-hole-diameter and easy-to-collapse.

3. Drilling fluids should be highly lubricative so as to well smooth drag of pipelines. It is especially effective in longer crossing projects that lubrication grease can reduce friction coefficient and back dragging force of pipelines.
4. In order to satisfy the requirements in crossing projects, the fluids pressure and flow should be adjusted from formation to formation and from phase to phase.

So drilling fluids solids control is so indispensable in drilling that we can't work in drilling without it . As one of the professional manufacturers in China solid control, KOSUN provides all the solids control equipment, such as shale shaker, decanter centrifuge,vacuum degasser, etc. KOSUN can also manufacture a whole solids control system for oil& gas drilling as the requirements of the customers.