Clay Mortar

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Clay Mortar

 

the technical name for a suspension of clay in water, used as a flushing liquid in well drilling.

Clay mortar is prepared in a special device either from powdered clay or from lumps of clay. Sometimes, it is made in the drill hole from clay previously drilled up. The properties of clay mortar differ under the influence of drilled rock, temperature, and so on. To achieve the desired properties, various chemical reagents and heavy mineral powders (such as weighting compounds, petroleum, or other agents) are added. The clay mortar is pumped into the drill hole through the boring tube, adheres to drilled rock particles, and brings them to the surface. After the clay mortar is cleaned of rock particles, it is pumped back into the drill hole. In flux, clay mortar has the properties of a liquid; in rest, of a solid body. By being filtered to a fluid state through the porous walls of the drill hole, the clay mortar forms a thin low-permeable shield that hinders the formation of gas, oil, and water flows, prevents collapse of the wall of the drill hole and jamming of the drilling pipe, turns the face motor-turbobore, cools the bit, and allows more intense drilling.

REFERENCE

Burenie neftianykh i gazovykh skvazhin. Moscow, 1961.

S. IU. ZHUKHOVITSKII

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The square temple made of brick with clay mortar is measured 11m per side.
Clay mortar should have the same composition as clay blocks (Table 9).
We built firebricks around the grill unit and used fire clay mortar or refractory cement to joint them in place.
They were laid in clay mortar, interlocking with each other, with their flat bases plastered to form the wall surfaces.