SU1654528A1 - Core barrel - Google Patents

Description

one

(21) 4622690/03 (22) 12.20.89 (46) 07.06.91. Bul №21

(71) Poltava Branch of the Ukrainian Research Geological Prospecting Institute

(72) Oh. N. Baranovsky, D. I. Melnik and A. A. Turko

(53) 622.243.64 (088.8)

(56) USSR author's certificate No. 642468. class. E 21 V 25/00, 1977.

USSR author's certificate number 1225896. class. E 21 V 25/00, 198-K

(54) COLUMN SHEET

(57) The invention relates to mining dil, namely the means for drilling with coring. The purpose of the invention is higher reliability. Kolinkovy snar d

a housing with a drill head and with a discharge channel sub for connecting it to drill pipes. Inside the body there is a pipe receiving core consisting of two end-joined parts, the bottom of which is fixed to the drill head, and the top is connected to the sub. At the lower end of the upper part core tube fixed shank with coregatel in the annular gap between it and the bottom of the core receiver tube. In this case, the lower part and the shank are connected with shears, and the sub is fastened to the body with a plug connection in the form of a foam stopper spring and a spring-loaded locking device located in the discharge channel, which has a saddle for a waste valve 1 s n f l., L or

SP

WITH

This invention relates to mining, in particular to core drilling tools.

The aim of the invention is to increase reliability.

FIG. 1 shows a shot, a slit; FIG. 2 is a section A-A in FIG. one; FIG. 3 is a section BB in FIG. 1; in fig. 4 - sn d in the position of capture and detachment xepnei.

The core projectile contains a body 1 with a drill head 2 fixed to it by means of an attachment 3 Vrhn part of body 1 in the form of a casing 4 is fastened with a diverter 5 with a detachable connection in the form of a spring-loaded spring 6 6 of the stopper 7 and a sleeve 8 which secures it and located in the discharge channel 9 of sub and having a saddle 10 under the waste valve 11 The sleeve 8 is spring-loaded spring 12

Nick 5 is made with a cam protrusion 13 for transmitting a moment of force and limiting its longitudinal movement relative to the body 1 in the form of a ring 14 connected by shear pins 15 to the support part 16.

In case 1 a core tube is installed, the tube is made of two parts adjoining the auction, the bottom 17 and the top 18. The bottom part 17 is fixed to the drill head by means of the centralizer 19. The top part 18 is connected to the sub 5 by part 18 a shank 24 is fixed by an adapter sleeve 23. In the annular azor between the shank 2A and the bottom part 17, the core 25 is installed; in this part 17 is connected to the shank 23 with 2P dowel pins

About SP Јw SL

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Channels 27-29 and drainage tube 30 are provided to ensure the circulation of the washing liquid.

The columnar works as follows.

When assembled, it is lowered to the bottom of the well and, after flushing, they start drilling with coring. The drilling fluid flows to the bottom of the well through the channel 9 through the annular space between the part 21 and the drainage tube 30 through the channels 28, through the annular space between the body 1 and the core tube and then through the holes of the centralizer 19 and the drill head 2.

After the well is drilled by the length of the core tube, valve 11 is inserted into the drill pipes. When the valve 8 overlaps the sleeve 8 by increasing the flushing pressure to the calculated compression force of the spring 12, the sleeve moves downward to align its outer annular groove with the stopper 7, which is under the influence of the springs 6 disengages from the casing 4, making it possible to move the sub 5 relative to the skin x 4.

The drill tool is lifted by the length of the cylindrical bore in the casing 4 to bring the corer into position, the shear pins 26 are cut off with the body weight, and the part 17 held by the centralizer 19 releases the core picker 25. Its release is evidenced by a decrease in pressure in the drill pipes as a result of opening channels 27.

In case of emergency (sticking), the pins 15 are cut off by the calculated force and the core tube with the core is removed to the surface.

Claims (2)

1. A column drill comprising a housing with a drill head and with a discharge channel sub for connecting the housing with drill pipes and a core-receiving pipe installed in the housing with a shank located on the outer side and with a core-holder in the annular gap between the shank and the lifting pipe, characterized in that, in order to improve reliability, the core-receiving pipe is made of two end-jointed parts, the lower part of the core-tube is attached to the drill head and connected to the shank with shear pins, the upper part of the core-tube is connected to the sub, the shank is fixed to the bottom the end of the upper part of the core tube, and the sub is fastened to the housing with a plug-in connection in the form of a spring-loaded stopper with a spring-loaded sleeve locking it in the discharge channel, which has a saddle for the discharge valve. 2. A tool according to claim 1, characterized in that the sub is made with a limiter longitudinal to move it relative to the body, wherein the limiter connected to the sub with shear pins. oo CN Yu T in id 6-6 Fig.Z