SU720105A1 - Device for making holes for cast-in-place piles - Google Patents

Description

rigidly connected to the rock-breaking element, and the other by means of a cam coupling with a drill string. Device image 1o in the drawing. The device consists of an intermediate stepped element 1, connected to an anchor (casing) 2 by means of a shank 3, bearing 4, thrust bearing 5, stopper 6, sealing cuffs 7 and 8. The drilling tool is rigidly fixed to the lower end of intermediate step element 1 and the upper end ends with a cam half coupling 10, the second half of the coupling coupling half 11 is attached to the drill string 12 centered with respect to the anchor (casing pipe) with a device 13 omezhutochnogo stepped portion, a check valve 14.

The intermediate stepped element 1 with the check valve 14 installed is assembled with all the other parts of the device — the shank 3, the supporting pin 4, the thrust bearing 5e, the stopper 6, the sealing cuffs 7 and 8, and the coupling half-coupling half, then it is attached to the lower end of the anchor ( casing) 2. Then the drilling tool 9 is screwed onto the lower end of the stepped intermediate element and the anchor is installed at the work flow, Subsequent technological operations into the internal cavity of the anchor 2, the drill string 12 is inserted, terminating with the cam coupling half 11. The drill string 12 with the help of tool 13 sits on the intermediate step element 1. Slowly rotating the drill string 12, the cam half couplings 1O and 11 are engaged, then proceed to drilling.

The torque is transmitted through the drill string 12 and the cam half couplings 10 and 11 to the intermediate step member 1 and the drilling tool 9, causing them to rotate, while the anchor 2 remains stationary. The flushing fluid through the drill string 12 enters under pressure into the intermediate step element, opens the check valve 14 and enters the bottom. Then, with drilled rock, it rises upward in the annulus. As you drill

wells are drilled at the drill collar} 12 and anchor 2,

After OKoiwaiiHH process is stormy) - .o

the drill string instead of the flushing fluid at the bottom of the well; i: i; tape solution and nonsteping for pipe elongation (X: tradition ",: foam of drill string 12 to the right side disengages cam couplings 10 to 11, this allows lifting of the drill string, leaving the drilling hole: on the face,

The device allows for gsykhohrs.ch: neither from the collapses of the walls of the borehole with s, drilling weapons in mkzhs unstable, flowing and crumbling grunt -; - :; It is necessary to use the anchor as casing string during drilling and refusal to use clay solutions for this purpose, which reduce the bearing capacity of the piles.

The use of this device when

the construction of bridge supports and the fixing of stationary platforms for the exploration and production of oil and gas in deep-water areas allows, at the expense of the mind

time for launching of the gfi drilling, flushing the well from the drilled rock1 1 to lowering the anchor to the other „significantly shorten the construction and installation costs; - wagons (: at the present time to mount unoi: o;:; Refusal to transfer taller ./io: rc ;. on a drilling tool through an anchor l: sash co.) allows the skill vv:, a buoyed MC.iynoCTb drilling ange::; use for drilling soil with more compact units.

a and a about b go r y

The device and the formation of skalzhp "bored with to ,. including rock-breaking eleme1 T. colonggu drill pipe and shrunk pipe about

It is provided with a view to reducing the time, and to do some work and improve the quality of demity-vania, it is equipped with XBostovik, at the end of the casing, and i /;

interstitial into scrap, sealed (permanently assembled in the shank with the possibility of its rotation, while onin the end of the shaft is rigidly connected to the porous seals, and the other - through the cam coupling with the drill string. Sources of information taken into account during the examination 1. Ganichev I. A. The device art tlh bases and foundations, M., Stroyizdat, 1973, pp. 282, 2. Japanese Patent N 51-4561, class 86 (1) В 2, 1976 (prototype).

Claims (1)

Formula invented ‘45 A device for forming wells under bored piles, including a rock cutting element, a drill pipe string and a casing, kicking about 5 ° by that. in order to reduce time for work and improve the quality of cementing, is it equipped with a shank? zeyyye flax at the end of the casing, and and, ⁵⁵ 'the intermediate shaft, hermetically installed in the liner with the possibility of rotation, with one end of the shaft rigidly tribute with rock-breaking element 20172015, and the other through a cam clutch with a drill string.