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A Discussion of Low Gravity Solids Content in Drilling Mud

Posted by Steve on June 3, 2013 at 6:35 PM


A Discussion of Low Gravity Solids Content in Drilling Mud

by Steve Ridenour, Anaqua Management, Inc.

Solid content is a fraction total solid in drilling mud, and it always increases while drilling ahead

because of drilling solids (cuttings), mud chemical additives and weighting material. When we

talk about the solid content, we always mean soluble and insoluble solid content in the drilling

fluid system.


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Friction Problems

Posted by Steve on June 3, 2013 at 6:20 PM

Friction and solids have been detrimental factors to the drilling of oil and gas wells from the birth of the industry.

Friction comes from rotational resistance (torque) and vertical resistance (drag).  Together, friction and solids slow down penetration rates, increase torque and drag, cause premature wear on bits and circulating equipment, and make it difficult to maintain optimum drilling fluid properties.  All of these factors are costly and account for a maj...

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Factors Affecting Friction

Posted by Steve on June 3, 2013 at 6:10 PM

Friction in a borehole is defined as torque and drag.  Drill string drag is the incremental force required to move the drill string up and down in the hole.  Torque is the moment of force required to rotate the pipe.  Both torque and drag are primarily due to sliding friction between the drill string and the well bore and drill cuttings.  The quantity of friction experienced is a function of many mechanical, chemical, and physical variables.  The four sources of frict...

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