SU30230A1 - Core drill - Google Patents

Description

The invention of a karaets core drill for sampling while drilling, consisting of an inner fixed pipe and two outer rotates with drill rods. In the proposed column drill, an inner tube is used consisting of two halves and having an opening for connecting the tube with the outer space and the two outer tubes.

In FIG. 1 and 2 depict a coring drill S longitudinal section, FIG. 3 is the same bottom view; FIG. 4-section on the line AB in FIG. 1, fig. 5-section on the CD LINE in FIG. 2 and FIG. 6 is a section along the line EF in FIG. 2

The core drill consists of two external boreholes. pipes 9 8 connected with the help of a common HEAD J2 into which they are screwed and firmly fixed with the help of several locking bolts 20. The length of pipes 9 8, i.e. the entire drill, depending on the diameter of the well, can be taken from six to twelve meters (with a diameter greater than 8).

To the lower end, the outer pipe 9 is screwed with a steel shoe 5, into the end slots of which are inserted cutters 4, which are pressed tightly with a ledge screwed into the pipe 8 of the second steel shoe 2, which serves for drilling

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The shoe 5 cannot be unscrewed, since during drilling only the cutters 4 are worn out, which, when unscrewing the shoe 2, are easily knocked out and can be replaced with spare tucked cutters.

In the head J2 there is an annular recess and holes connecting space 22, where the ARMIC solution flows from the drill rod channel, with prostration 27 between the pipes P and 5, through which the mud is fed to the cutters 4 through the shoe ring 5 and washes away the mass .

In addition to pipes 9 and 8, there is still a third, internal, pipe 7, consisting of two HALF, joined together with screws 6, 19, 19 to 10 attached to it. Ring 6 lies on the steel balls that are nested above the end of the shoe 2. Rings 19 and 19 support the balls, allowing the entire borax to rotate while drilling, not dragging the pipe 7, and finally, the ring 70 is pressed to persistently:; at the ball bearing // attached to the inner surface of the heads; with drills for wells with a diameter greater than 8 above the rings J9, 19 barb: and ball bearings are being mounted.

The space 22 of the head 12 of the inner cap 21 is separated from the space 23,

which includes the column drilled rock. This space 23 is connected to the space 24 by means of a channel in the stopper 13, and the space 24 is connected to the outer space by two openings and tubes 7 7, i.e. with a well, where the fluid pressure is significantly less than in space 22 (in drills of other structures, space 24 is connected to space 22, into which the mud is pumped by a pump under high pressure).

The space 23 is connected by the channel of the plug 13 to the space 24, and this channel is closed by a ball valve 14 consisting of a ball and a spring 18, which prevents it from separating to a great height from the socket,

In the space 25, which is a continuation of the spaces 23 and 26, there is an opening 16, closed by a plug 28 screwed into it. If this plug is unscrewed, then the opening 16 can be connected to the water line by means of a nozzle and a hose. Pumping up the water, you can rinse the spaces 23 and 26 with it, and also fill them with water, closing the hole of the drill with the valve with the pin 7 at the bottom.

The cam & pan with the pin 7 is screwed into the lowermost end of the shoe 2 below the gateway 3 and provided with a right-hand thread (instead of the valve with the pin 7, the hole can be closed with a fiber circle, the edges of which are worn out after the first few tens of turns and the inside of the drill goes).

Before descending through the hole 76, the space is washed with water, inserted filled cutters 4 and then the pipe 7 are inserted and balls (or ball bearings) are inserted, after which the shoe 2 is screwed down, the lower hole of which is closed with a valve with a lance 7. After that, the whole space 23 and 26 is filled with water, the patent is turned away, and the opening 76 is closed with a stopper.

After the drill is lowered, it is not brought to the bottom of the drill, flushing begins, and the Sur is gradually lowered. When it reaches the bottom and starts drilling, the valve valve cuts into the ground, and when it rotates, the valve opens and enters the drill under the pressure of the drilled column. A valve with a pick 7, lifting up / covering the column and protecting it from water erosion, filling the space 23, the Column, the entrance to this space, first, overcomes the external pressure, not the internal pressure, which is significantly greater than the external pressure. - second, it displaces water, not the mud solution and therefore does not mask them; thirdly, because it enters the inside of the pipe 7 that does not rotate with the drill, also does not rotate, and therefore the loose rocks located between the more dense, not abraded. When the drilling is completed, when lifting the drill, the prism 3 holds the column in its lower part and it is carried out. When the drill is removed, the shoe 2 is unscrewed, the pipe 7 is removed, the rings 6, 79, 19 and 10 are removed, and the pipe is opened into two parts; thus, the column / soil is freely removed and placed in a special crate.

In the case of a storm, there may be a second pipe 7, which, upon removal of the first one, is inserted in its place, and the auger may be launched again without delay.

The proposed core drill, according to the inventor, possesses the maximum percentage of extraction of the drilled column, and also eliminates the possibility of masking the soil with clay, due to the fact that the column, the entrance upwards, displaces pure water, and not clay mud.

The subject matter of the invention.

Core drill for sampling while drilling, consisting of an inner stationary pipe and two outer, rotating together with drill rods, characterized by the use of an inner tube 7, consisting of two halves, interconnected by rings 19, 6, with balls placed above them or ball bearings, and having openings with tubes 77 for connecting the pipe to the outside, and two outer pipes 5 and P, connected by a head 72, having an opening 16 for flushing the drill and for filling it with clean water, with the pipe 8 being connected The shoe 2, which serves to drill the column, is provided with a valve with a pin 7 at the bottom, which is cut right and serves to keep clean water in the drillstorm when it goes down the well before meeting it.

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