FIELD: construction, particularly directional drilling along with drilled well reaming and means for trenchless pipeline laying in ground.
SUBSTANCE: method involves performing directional drilling of pilot well; creating communication well bore by means of pilot well reaming. Well reaming is carried out along with grooving in lower well wall part arrangement area. Well reaming device comprises drilling string, rock-cutting reamer attached to drilling string, swivel secured to rock-cutting reamer and draft tube string pivotally connected with rock-cutting reamer by means of swivel. Device has at least one scraper means provided with bearing part made as movable link of kinematical chain, which fastens draft tube string to swivel.
EFFECT: possibility to create conditions favorable for non-removable parts deposition in recesses outside pipeline outline during communication well reaming.
5 cl, 4 dwg
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