PROCEDURE, INSTALLATION AND VALVE FOR ADJUSTMENT OF ROCK DRILLING

摘要

FIELD: oil and gas production. ^ SUBSTANCE: according to procedure difference of pressure effecting rotation engine is applied for adjustment of guide valve which is so enabled to regulate control pressure of supply control valve. The installation consists of the guide valve adjusting control pressure of the supply control valve under effect of difference of pressure operating at a rotation engine. The valve also contains a delay element retarding return of a valve slide to a normal position at travel of the slide from the normal position under effect of pressure difference operating on the rotation engine. ^ EFFECT: facilitating more reliable and functionally improved adjustment. ^ 8 cl, 1 dwg