SU1298339A1 - Drilling tool - Google Patents

Abstract

The invention is intended for drilling with the selection of monolithic core of frozen soil during engineering geological surveys. The goal is to improve the quality of the core. The rig contains a pipe (T) 1 with external spiral pins (2), along the entire length of which the slurry-guiding slots are evenly spaced at equal intervals. Between them, the mustache (L C X O) CO oo; o .1

Description

installed in pairs and symmetrically with respect to the longitudinal axis of jumper 4. A removable crown 9 with incisors is installed on T 1. 10, in which inclined sludge-removal grooves 12 and sludge-lifting grooves 13 are made. Inside T 1, pockets 14 are installed in which the core extractor is placed. The latter consists of the upper 16 tubular crosses (TK), connected by means of a ball lock 18 with Nina TC 17. In the lower part of the TC 17 is located a cross-shaped. The pusher 19.

one

This invention relates to mountainous

to the case of drilling means with the selection of monolithic core of frozen soil during engineering geological surveys.

The aim of the invention is to improve the quality of the core.

Fig. 1 shows a drill bit before drilling, the general view of Fig. 2 is view A in Fig. 1; on fig.Z - section bb in figure 1; figure 4 - section bb In figure 1; FIG. 3 shows a drill bit before a core breakdown, a general view of FIG. 6, the interposition of the drill bit and the frame of the drilling machine when removing the core from the drill shell in FIG. 7, view G of FIG. 5, FIG. Z view D. on fig.5.

The drilling projectile contains a pipe 1 with external spiral slime-guiding (slots 2, the entire length of which are evenly spaced at equal intervals of slurry-guiding slots 3, the slots 4 between which are arranged in pairs and symmetrically relative to the longitudinal axis. adapter 5 with chamfer 6 and shank 7 for connection with rod 8

At the lower end of the pipe 1, a removable crown 9 is installed with incisors 10 mounted obliquely with respect to the radius of rotation of the crown 9 and cone 11. In the crown 9 body there are also end-face slurry slots 12 inclined with respect to the radius of rotation and inclined with respect to. vertical slurry grooves 13.Vnut-

The crown 9 is connected via T 1 to an adapter 5, having a shank 7 for being coupled with a rod 8. Drilling sludge formed under the cutters 10 when drilling a well through slots 12 and 13 goes to the slot. Then it goes up to the top of the core through WD 2 it accumulates on it as the projectile deepens. When lifting, cuttings according to the NR 2, the latter fills the space between T1 and the borehole wall, as well as between T 1 and the core. 8 il. .

At the pipe, in the upper end of the screw grooves 2, pockets l4 are installed, which are, for example, pipe sections cut lengthwise into two parts and crushed, as indicated in FIG. 2, in the pockets 14 a core extractor, made in the form of a line 15, is placed the upper tubular crosspiece 16, which is rotatably connected coaxially with the lower tubular crosspiece 17 through a ball lock 18, which simultaneously acts as a rolling bearing in the connection of the crossbars 16 and 17. At the bottom of the lower tubular crosspiece 17 a cross-shaped push rod 19, staples 20 and the finger 21 is put on the shank 7, with unloading of the drill core projectile (6), wherein the crossbar 22 is inserted into an axis which at its ends communicates with the frame 23 of the glass.

The thickness of the jumpers 4, their width and height, as well as the pitch and number of screw slots 3 are selected depending on the diameter of the pipe, its wall thickness, torque and axial pressure applied to the drill string.

Snar d works as follows.

. The drill (FIG. 1) is connected to the rod 8 through the pin 21, and then with a drilling machine (not shown), the drill is lowered onto the face and core drilling is performed. Cuttings formed under the incisors

312

10, through the inclined grooves 12 and 13 enters the bottom of the screw slots 3, and under the influence of the lifting force arising when the slurry contacts the rotating screw surface of the screw slots 3 and the cylindrical surfaces of the well and core rises up the screw grooves 2 to the top of the core where the contact slurry with a cylindrical surface of the core terminated

The slurry is poured onto the top.

attached to the winch rope of the drilling machine (not shown), With this winch lift brown drill. A sniper until the ends stop, the axis 22 on the frame of the drilling rig 23 (Fig. 6). The winch is turned on to lift: the axis 22, together with the upper crosspiece 16, remains stationary relative to the frame of the drilling machine, and the drill head is lifted upward with the help of a rope, simultaneously rotating along the screw cut m 3 relative to the vertical axis of the drill shell. leaning on

the core and accumulates there as the drill string deepens. When lifting sludge along screw grooves 2, the latter fills the space between the core 15 through the cross-shaped pusher 19, the battle 1 and the wall of the wells, and also between the top and the top crosspiece 16.-

Control pipe 1 and core,

G.

After filling the drill string

the core and the sludge on the drilling projectile, stopping the rotation, apply from the drilling machine through the rod 8 an increased axial load P. In this case the following occurs. By

somewhat lower rigidity of the pipe 1 parts located between the bars 4 (as compared with the more rigid pipe sections passing through section BB in Fig. 3), these

portions are slightly arched outward (the image of the convexity of these portions in figure 5 is exaggerated). At the same time, the sludge fills the increasing gap between the pipe 1 and the core. The rotation is stopped and the vertical load P is removed from the drill string. At the same time, the convex sections of the pipe are straightened and the core is tightly compressed through the sludge over the entire height. Then include

climb snr yes In this case, the sludge found by jumpers 4, and again lifts the wedge between the conical part of the crown and the core, wedges the last one and the core breaks down. This breakdown also contributes to the fact that

With the ROBOX up to the stop axis 22 on the frame of the drilling rig 23, then the drill rig is raised with a winch in such a way that the upper crosspiece 16 of the part 1 of the pipe 1 compresses the core through the height below the first upper pair of slimes over the entire height, which in turn helps keeping the core in the hole when lifting wells.

After lifting the borehole through the upper ends of the screw holes of the cuts 3, the axis 22 is inserted into the hole of the upper tubular crosspiece 16 and with it the crane is lifted 4, and the described transition cycle through jumpers 4 is repeated until the core is completely out of the drill cage .

Since the cross-shaped pusher 19 presses the core through the slurry evenly enough (due to the pressure prism formed under the cross-shaped pusher 19), the core goes out of

Since the cross-shaped pusher 19 presses the core through the slurry evenly enough (due to the pressure prism formed under the cross-shaped pusher 19), the core goes out of

KU 15 above pockets 14 and screw slot m 3 of the axle 22 are inserted into the drill screen and intact, those with a line-up 15 on the cuttings, at the end of the core removal, the axle 15 together with the axis 22 lifts (Fig.6). Instead of the rod 8, it was installed inside the projectile along the screw grooves 2,

they wring bracket 20 and finger 21. Bracket 20

attached to the winch rope of the drilling machine (not shown). With this winch, the drill is lifted up to the ends of the stop, the axis 22 to the drilling machine 23 (Fig. 6). The winch is turned on to lift: the axis 22, together with the upper crosspiece 16, remains stationary relative to the frame of the drilling machine, and the drill head is lifted upward with the help of a rope, simultaneously rotating along the screw cut m 3 relative to the vertical axis of the drill shell. leaning on

the core through the cross-shaped plunger 19, and on the upper crossbar 16.- through

the ball lock 18 rotates along with the core and drill rig. At the same time, the core is expelled by the pushing force Q, equal to the tractive effort of the winch of the drilling machine, and each end of the axis 22 rests on the frame of the drill machine 23 with a force equal to

The lifting of the drilling rig and the winch is carried out before the axis 22 approaches the first, upper pair of jumpers 4, the Bottom cross 17 at this moment has already passed below the first upper pair of jumpers 3. The lifting of the drill string is stopped and the drill is lowered down, freeing the axis 22 from contact with the frame of the drilling machine 23, the axis 22 is taken out of the hole of the upper crosspiece 16, put it in the hole of the lower crossbar 17, located below the first, upper pair

jumpers 4, and again raise the STEAM until the axis 22 stops against the frame of the drilling rig 23, then with a winch lift the drill string so that the upper crosspiece 16 is lower than the first upper pair of e-

Mychep 4, and again described the cycle of transition through jumpers 4 until the core is completely out of the drill string.

Since the cross-shaped pusher 19 presses the core through the slurry evenly enough (due to the pressure prism formed under the cross-shaped pusher 19), the core goes out of

the drilling projectile, intact; Upon completion of the core extraction, the piston 15, together with the axle 22, is raised inside the projectile along the screw grooves 2,

At the same time through jumpers 4 transitions

d t as follows. When the axle 22 (together with the piston 15) is lifted up to the first bottom pair of bridges 4, a mounting crowbar (not shown) is inserted into the hole of the lower crosspiece 17, an axle 22 is removed from the upper crossbar and the assembly 15 is lifted off the upper crossbar by a mounting crowbar the crosses 16 have passed the lower pair of jumpers 4. After that, the axis 22 is inserted into one of the holes of the upper cross 16 And continue to lift the line 15, stepping over the pairs of jumpers 4 in the manner described. When raising the piston 15 to the upper end of the screw grooves 2 (FIG. 2), the assembly 15 is placed with the upper crosspiece 16 into the pocket 14 (FIGS. 1 and 5), the axis 22 is removed, the clip 20 is disconnected from the drill string, the rod 8 through the finger 21, lowering the drilling rig I into the well, and repeating the described drilling and core recovery cycles before the well is drilled to the design depth.

The cross-shaped shape is given to the pusher 19 in order to facilitate: its movement inside the pipe 1, as well as to pass water inside the pipe 1, which sometimes appears when the aquifers located between the frozen soil layers pass.

When squeezing the core (Fig. 6), axis 22, moving along the screw grooves 2, simultaneously clears them from cuttings. To reduce friction axis 22 o

 The slurry and screw slots 3, the cross section of the axis 22, is not circular, but rectangular. The rectangular sectional axis 22 is not shown.

Inclined with respect to the radius of rotation of the cutters 10 of the crown 9, as well as inclined with respect to the radius of rotation of the end slurry grooves 12 and inclined with respect to the vertical slime-lifting grooves 13 direct the slurry from under the cutters 10 and immediately transport it to the screw holes of the pipe 1, minimizing its grinding.

Claims (1)

Invention Formula  five A drill bit containing interconnected crown with slurry grooves, an adapter connected to a pipe having external spiral slime guide grooves and slime guide slits with jumpers, characterized in that, in order to improve the quality of the core, it is provided with a core extractor, made up as a line-up of two axial tubular crosses interconnected with the possibility of rotation one relative to the other, while the slime-guiding slots are evenly spaced at regular intervals along the entire length of the slurry is guide grooves, 35 and the jumpers in the intervals between the slots are arranged in pairs symmetrically with respect to the longitudinal axis. 20 25 FIG. 7 F1Ag.5 I fit f sa f f: f TTT Wee Shtm VidG 23 Fig, 1 & ya .1L. / f FIG. 6 Reda ktor A. Vorovich Compiled by V. Aksler Tehred L. Serdyukova DS Corrector A. Obruchar 868/31 Circulation 533 Subscription - VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 us..b