DRILLING FLUIDS AND WELL SERVICES PRESENTATIONS
The símplest drilling fluid is a dirty mixture of water and clay, often referred to as mud. The drilling fluid in the drilling process can be seen as the equivalent to the blood in the human body, the mud pump is the heart , and the drilled out shale (cuttings) represent the slag products. At the surface, we find the rnud cleaning system which correspond to the kidney and the lungs. In the rnud cleaning system the cuttings are removed by means of a sieve, the shale shaker.
Mud is basically a fluid (water or oil) circulated
to bring cuttings out of the wellbore. Two important qualities of the fluid are
needed for mud to achieve all its tasks:
Viscosity.
water and oil has a viscosity of around 1 cP (centipoise), which is far too little
to transport the cuttings out. A component is needed to increase the viscosity.
The main viscosifyers are clay and
polymer.
Density.
water and oil have a density of around 1 kg/l. which in most cases is too little
to counter high pore pressure. It may in fact become necessary to increase it to twice
the pressure of a water column. The main density giver is Barite (BaSO) , a mineral
often found as evaporites (with a specific density of 4.2 kg/l), or, soluble
salts (brines ).
Creating a drilling fluid and giving well services can be essential in the drilling process, what else can you tell me?
This blog is especially designed for you, 5o A in drilling fluids and well services.
