DEVICE FOR CONTROLLED INJECTION OF LIQUID INTO INJECTION WELL Russian patent published in 2025 - IPC E21B43/20 

FIELD: obtaining oil and gas from wells.

SUBSTANCE: invention relates to oil and gas industry and can be used for maintenance of formation pressure for controlled injection of fluid into injection wells. Device for controlled injection of liquid into injection well includes injection well with wellhead shutoff valve, supply pipeline with shutoff-bypass device equipped with shutoff element and drive connected to shutoff element via reduction gear and receiving signals from control station. Shutoff element is made with a predetermined number of longitudinal through holes and with a predetermined diameter of said through holes, configured to supply a liquid working agent to the injection well at the moment of opening the corresponding through hole, after moving in process of working agent pumping from one through hole to another. Shutoff element is made in form of drum with through holes arranged along circumference uniformly relative to axis of rotation of drum. Drive is made in the form of a stepper motor rotating in one direction and providing, by means of a reduction gear, sequential opening of through holes in response to a signal from a control station.

EFFECT: proposed device allows to simplify the design of the shutoff element-drum and the drive due to the uniform placement of the through holes around the circumference relative to the drum axis and rotation of the drive only in one direction without reversal with the same step for each signal from the control station.

2 cl, 5 dwg