METHOD AND SYSTEM FOR SECURING PLUG OF BIT AND WELLHEAD CONTAINING SUCH SYSTEM Russian patent published in 2024 - IPC E21B23/02 E21B33/35 

FIELD: mining.

SUBSTANCE: invention relates to a method and a system for securing a bit plug, and a wellhead comprising such a system. System comprises an external element of the channel, a crown plug and a fastening device designed to fix the crown plug inside the said external element. Fastening means comprises a clamping structure activated to produce one of a first configuration and a second configuration. In the first configuration, the clamping element is in the unclamped configuration and provides the possibility of the bit plug movement in the axial direction inside the external element to the axial position, which is aligned with the clamping element of the clamping structure. In the second configuration, the clamping structure exerts a radial force on the external element, which is sufficient for deformation of the external element inwards to grip the crown plug and its fixation in an axial position inside the channel. Bit plug comprises a one-piece component. When changing from the unclamped position to the clamped position, only the positioning of the crown plug in the clamped position is required without the need to perform any manipulations with any fastening elements located on the crown plug. Crown plug is designed to be fixed in place solely by means of a clamping structure. Crown plug is made with possibility of being fixed in place solely by movement of elements located outside the external element. Bit plug comprises a main body configured to create a barrier across the outer element. Main body comprises a solid body, and the solid body provides a plug which fills the outer member within the sealing zone, and the sealing zone extends along the axial length of the outer member.

EFFECT: improved design of the crown plug which is also simple and reliable in operation.

18 cl, 4 dwg