the Thermal stream in velikobritanii. Factors of value of temperature gradients

you are: the Thermal stream in velikobritanii

Accuracy from which the temperature gradient is measured, depends also on accuracy of definition of depth to which temperature readout are carried.

Richardson and Oksburg used a cable with labels through 10 m that gives reproducibility in 0,075%. Depths between labels were interpolated by means of the counter of depths. By estimations of authors, the error in definition of a temperature gradient makes less, where In - a temperature gradient in To/km.

Values of temperature gradients are influenced by two factors connected with a condition of a chink:

1) Duration of time which has passed after a stop of drilling. Circulation of a chisel solution on a chink in the course of drilling leads to increase of temperatures in the top parts of a chink and to fall of temperatures on depth. Bullard and Oksburg, etc. have received analytical and numerical decisions accordingly for an estimation of the established temperatures on unsteady temperatures of a face of chinks. When there is enough considerable quantity of data, these estimations can be rather exact.

2) Infiltration of underground waters in a chink. This indignation can be avoided, if in appropriate way to isolate a chink from breeds surrounding it. With that end in view a chink fill with cement and then again razburivajut a drill of smaller diameter (as it is made in chink Rukhoup) or plant round a chink with a column of metal pipes and fill with cement surrounding ring space.