US 11,982,142 B2
Method and apparatus of smart pressures equalizer near bit sub
Mohammed M. Otaibi, Dammam (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Nov. 19, 2021, as Appl. No. 17/455,818.
Prior Publication US 2023/0160270 A1, May 25, 2023
Int. Cl. E21B 21/08 (2006.01); E21B 21/10 (2006.01); E21B 34/10 (2006.01); E21B 34/16 (2006.01)
CPC E21B 21/08 (2013.01) [E21B 21/10 (2013.01); E21B 34/10 (2013.01); E21B 34/16 (2013.01)] 19 Claims
OG exemplary drawing
 
15. A method, comprising:
controlling, by a controller, a multi-directional two-way check valve for tripping phases during drilling, wherein the tripping phases comprise of surging effects, wherein the valve is mounted along a drill string adjacent to a near bit sub on the drill string adjacent to a drill bit,
wherein the valve comprises:
a main body containing a shuttle;
a primary inlet connected to the main body;
a secondary inlet connected to the main body; and
an outlet connected to the main body, wherein the shuttle is moved by a pressure differential of the primary inlet and secondary inlet so as to control which of the primary inlet or secondary inlet is connected to the main body, wherein which one of the primary inlet or the secondary inlet is connected to the main body controls whether suction or discharge flow is applied;
controlling, by the controller, the multi-directional two-way check valve for tripping phases during drilling, wherein the tripping phases comprise of swabbing effects;
applying, by the valve, suction to counter inertial effects of mud viscosity in a wellbore; and
applying, by the valve, discharge flow to counter inertial effects of mud viscosity in a wellbore.