Method of in-situ testing of a drilling fluid

Details Method of in-situ testing of a drilling fluid Method of in-situ testing of a drilling fluid

1990-12-12

1991-08-27

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

73 641, E21B 4706

Patent

active

050422960

ABSTRACT:
The method comprises during a drilling operation wherein the drilling fluid is set moving and the drill string is stationary, monitoring the pressure of the drilling fluid pumped into the drill string depending on the volume of liquid pumped in the drill string and determining, from the pressure curve, a physical property linked to the thixotropy of the drilling fluid. An advantage of the invention is that the highest point of the pressure curve indicating the start of the fluid flow into the well is easily visible, and its maximum value can be measured to find the gel strength specific value.

REFERENCES:
patent: 4274283 (1981-06-01), Maus et al.
patent: 4341115 (1982-07-01), Alekhin et al.
patent: 4694692 (1987-09-01), Brown et al.
patent: 4726219 (1988-02-01), Pearson et al.
patent: 4879654 (1989-11-01), Bruce
P. Parigot, "Surface Recorder Can Signal Downhole Drilling Problem", World Oil 201, No. 6, pp. 71-79, Nov. 1985.

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