Optimization of wells construction by applying the adjustable pressure drilling technology
UDC: 622.24
DOI: 10.33285/0130-3872-2022-9(357)-5-8
Authors:
BABAEV MAGOMEDSHAH K.
1,
BABAEV ELMAR K.2,
ZALBEKOV MUSLIM YA.3
1 LUKOIL-Komi, Usinsk, Russia
2 Research and Design Center for Gas and Oil Technologies, Moscow, Russia
3 Peoples' Friendship University of Russia, Moscow, Russia
Keywords: rotary wellhead sealer, overbalance, underbalance, pressure, preventer, blowout, absorption, open wellheads, equivalent circulation density (ECD)
Annotation:
The proposed technology of ADJUSTABLE PRESSUREDRILLING (APD) by means of special sensors controls the density, temperature and flow rate of the drilling fluid at the inlet and outlet of the wellhead every second and provides the relevant information on-line, informing about the loss or manifestation of the well. A special electronic adjustable choke at the wellhead (located after the ADP allows adjustment of the outlet (from 0 to 100 % of opening). Thus, it becomes possible to instantly change the well pressure due to a fully open valve at the well inlet (supplying manifold), on the one hand, and a valve partially closed by the regulator at the well outlet, on the other hand. The difference in the flow rate of the drilling fluid at the well inlet and outlet creates an adjustable hydrodynamic pressure of the fluid column on the open wellbore and on the well bottom.
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