| 摘要 |
A sliding sleeve for frac operations or the like has a housing, a sleeve, and a shock absorber. The sleeve is movable within the housing's internal passage relative to flow ports. The shock absorber, which can have a cylindrical body, positions partially in the sleeve's internal passage and h as a distal end that extends beyond the sleeve. A lip on the sleeve's end is engageable with the internal shoulder. When a ball is dropped on the sleeve' s ball seat and pumped fluid forces the sleeve to an open position, the shock absorber absorbs the movement of the sleeve. To absorber the movement, the shock absorber breaks one or more shear pin connections with the sleeve, interposes its lip between the sleeve's distal end and the internal shoulder , and fractures at least a portion of its distal end from the impact with the sleeve.
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