ANTI-TRAP PROTECTION DEVICE Russian patent published in 2021 - IPC E21B33/37 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry and can be used to protect underwater column heads from the mechanical impact of falling objects and a passing trawl. The proposed anti-trawl protection device containing supporting elements forming a frame made in the form of a truncated pyramid with angles at the base of less than 58 degrees to protect the column head from the trawl, stiffeners, plastic protective grids located between the supporting elements and fixed to them using clamps with bolts and nuts, anodes for corrosion protection installed on the inside of these support elements. At the same time, a body with a lid is made inside the frame. On the body of the frame, a piping with a plug of the receiving device is installed to protect the receiving device from mechanical stress and to ensure the supply of the inhibitor, and inside the said housing there is a branch pipe made with the possibility of layer-by-layer filling with the inhibitor of the inner space of the casing head together with the installed casing hangers in the zone ensuring tightness constructions. Extension cords with rollers and fixed forks are additionally installed inside the support elements. Wherein, the extensions are centered inside the frame due to rollers and support-fixing mechanisms, where the fingers limit the final position of the extensions, and also prevent spontaneous rotation of the extensions around their axis.

EFFECT: increasing the functionality of the device by reducing the corrosion destruction of metal structures using electrochemical protection and replacing the silencing solution with a protection agent.

3 cl, 3 dwg