DEVICE FOR DIRECTIONAL DRILLING WITH CORE EXTRACTION Russian patent published in 2024 - IPC E21B7/08 E21B25/02 

FIELD: mining.

SUBSTANCE: invention relates to means for directional core drilling in exploration of solid mineral deposits. Disclosed is a device for directional drilling with core extraction, which includes a non-rotating housing of a deflector, a drive shaft, a core receiver, a curvature unit, a unit for opening into the walls of the well and a blocking unit. Blocking unit includes a housing with a drain channel connected in the upper part with the orienting sub, and in the lower part – with the drive shaft of the opening assembly into the well walls. Inside the blocking unit housing there is a piston in which a fixing pin is fixed. Piston is connected to a return mechanical spring and a sleeve with radial holes conjugated with radial holes in the drive shaft. Unit for breaking into the well walls includes three spacer plates, which are installed at angle of 120° relative to each other into holes, which are made in the middle part of the deflector housing, which is made in the form of a composite outer pipe, in the upper part of which there is a locking groove, and a rubber collar fixed by the collar attachment sleeve behind the spacer plates. Hydraulic chamber is formed between the collar and the drive shaft. Curvature assembly includes a fixed eccentric housing installed in the deflector housing through threaded connections. Movable eccentric bushing is installed on the protrusion inside the passage hole of the eccentric housing, with the possibility of rotation, inside which there is a sliding bushing, which is made of fluoroplastic. Drive shaft is made of a single pipe with the possibility of passing inside the core receiver, on the body of which there are radial holes, to the lower part of which a hinge shaft is fixed, in which the centring and locking rings are fixed. Hinge shaft is connected to the reamer bit.

EFFECT: possibility of drilling directed wells with continuous core extraction.

1 cl, 4 dwg