EQUIPMENT FOR TRENCHLESS LAYING OF PIPELINES

• Main Authors: VASIN SERGEJ A,SU, GRIGOREV SERGEJ M,SU, SVECHKOPALOV ANATOLIJ P,SU, KANTOVICH LEONID I,SU
• Format: Patent
• Language: English; Russian
• Published: 15.12.1991
• Subjects: BLASTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRICITY; ENGINEERING ELEMENTS AND UNITS; FIXED CONSTRUCTIONS; GALLERIES; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERATION; HEATING; INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINEDOPTICAL AND ELECTRIC CABLES OR LINES; JOINTS OR FITTINGS FOR PIPES; LARGE UNDERGROUND CHAMBERS; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PIPES; SHAFTS; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; TUNNELS; WEAPONS

PCT No. PCT/SU89/00006 Sec. 371 Date Sep. 25, 1989 Sec. 102(e) Date Sep. 25, 1989 PCT Filed Jan. 13, 1989 PCT Pub. No. WO89/07178 PCT Pub. Date Aug. 10, 1989.Pipe sections are forced through the ground, separating from the mass of the ground its part received in these pipe sections. This part of the ground is evacuated with the sections. As the pipe sections are evacuated, a stationary pipe is layed. The pipe sections are forced into the ground by a main hydraulic power unit and an intermediate hydraulic power unit positioned between the pipe sections having each a cavity communicating with a hydraulic system and intended to exert pressure on the end of the preceding pipe section. This cavity is defined by two rings rigidly secured at the preceding section. The front end of the succeeding section having an annular sealing element is inserted in a clearance between the rings.