FASTENING FLANGE CONNECTION VIA STUDS WITH SEGMENT ELEMENTS Russian patent published in 2023 - IPC E21B33/03 F16L23/36 

FIELD: mining.

SUBSTANCE: invention relates to mining, in particular to oil and gas extraction, and may be used during well workover operations in order to fix various wellhead equipment on a support flange of a well, as well as to fix the wellhead flange during well operation. Fastening flange connection via studs with segment elements contains supporting and wellhead flanges, metal sealing ring installed between them in grooves with cone-shaped surfaces, holes in the supporting and wellhead flanges for fastening under stud bolts with nuts, a number of nuts is designed in the form of segment elements rigidly connected to stud bolts with the help of thread connection, segment elements of stud bolts with their lower ends throughout the contact area with flange. The segment elements rigidly connected to the stud bolts via threaded connection are secured with retaining screws. One end of the segment elements is provided with grooves, while the opposite ends are provided with studs. The segment element stud is designed to engage with the slot of the subsequent segment element, and the slot of the segment element is designed to engage with the slot of the preceding segment element. The studs segment elements are designed to form a gap between the segment elements ends.

EFFECT: invention provides for increasing reliability, reducing labour intensity and time required for assemblying/disassemblying the flange connection via studs with segment elements, and also reducing metal consumption.

1 cl, 5 dwg