Patent ID: 11965383
Assignee: STABIL DRILL SPECIALTIES, L.L.C.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 14:
15. A downhole shock absorbing sub comprising:
(a) a tubular main stem extending through a sub housing;
(b) a lateral shock absorbing assembly positioned within the sub housing and comprising:
(i) an activator ring positioned around the main stem;
(ii) a reaction collar positioned on each side of the activator ring;
(iii) a plurality of wedge inserts and corresponding ramp surfaces acting between the activator ring and the reaction collars;
(iv) a spring system positioned to resist movement of the reaction collars away from the activator ring; and

(c) whereby lateral movement of the main stem causes interaction between the wedge inserts and ramp surfaces to move the reaction collars against the spring system.