SU1221308A1 - Auger drill for rotary-percussive core drilling - Google Patents

Description

The invention relates to the drilling of large-diameter wells, in particular to the drilling of wells in strong rocks, as well as in pebble-and-scaly rocks, which are under D permafrost conditions, a core shock-rotational method.

The purpose of the invention is povepie reliability.

Figure 1 shows auger drill with a core trimming mechanism in the original nolozhen1-sh, general view} in Figure 2 - the core trimming unit node in the positioning trimming is completed, node 1 in fig .; FIG. 3 shows the core breaking mechanism J3 of the original polission, section A — A in FIG. 4 shows the stopper mechanism assembly of a kernola scarf, vnd B in FIG. 3,

The auger drill DL51 colon beats of the ar-rotational bore1 includes an external hollow and. nekovuy pipe 1, the most. connected with a large flow pipe of pipe 2, driven by the objec- tion in a known manner from the surface. The upper part of the auger tube forms the bunker 3, which serves; i1 collection I will select peHHii rock. A percussion mechanism is mounted inside the auger tube, which causes weakening of blows along the squalane axis and lateral blows. The design of this mechanism provides the transfer of axial load on the destructive tool, the application of periodic impacts on it and its intermittent rotation. ,

Inside the drill, inside the auger tube 1, a core set is placed, including a core tube 5, a drill bit- 6, equipped with carbide cutters or a slug bit, as well as a drill bit.

trimming and breaking core,

The mechanism for undercutting the core includes a double-sided wedge 7, freely installed in vertical nanoscale 8, rigidly fastened} with a central part of the inner wall of the tubular tube 5 (Fig. 2). The latter is fastened with the anvil 9 of the removal mechanism, to. Inside the wedge 7 there is a cutter 10 with a working part 11. The cutter 10 is connected to the guide 8, which is fixed to the inner wall of the core pipe, via an axis 12.

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The number of cutters for undercutting the core is equal to or a multiple of the number of rows of cutters in the crown, since the guides 8 enter into the corresponding cuts in the crown, which are located between the rows of cutters in the drill crown.

The wedge 7 can freely move in the direction of E1 and 8 and interact with the cutters 10. When moving double-sided wedges 7 upward, the lower part of each wedge deflects the corresponding cutter to the central 1H axis of the drill, pressing the working part to the core, and when moving the wedges downward, a part of each tire deflects the corresponding cutter with a working part from the core.

Each double-sided wedge 7 is connected by means of tg 13 to a base plate 14 placed in the upper part of the core tube 5. The connection of the tg 13 to the base plate 14 is made through springs 15. The support plate 14 can not be moved along the guides 16 (Fig.CH and 2), fastened to the core tube, and equipped with a gun; kinami 17, which hold the support rod in the lower position. In the central part of the base plate 14 there is an under-knot assembly, having a supporting node 18 and a ball bearing 19, ending with the release of the fifth 20.

The mechanism 21 for breaking the core (Figs. 3 and 4) includes a guide

, 22 of the spiral shape, which is fixed horizontally in the upper part of the core pipe 5 on its lateral wall, a corenolum lash 23 with a spring 24 and a stonor fixture 25. The latter is

, the latch and is equipped with a rod 26 with a spring, a gum 27 and an abutment 28 ti 13, which can interact with the latch shank 25. The work and interaction of the mechanisms is carried out as follows.

A. When drilling squalsin.

In the initial position (Fig. I), the auger bit is located at the bottom of the squalice. At the same time, the support plate 14 under the influence of its own weight and force of the springs 17 is in the lower position, as a result of which the bilateral 7 tires are also lowered, which ensures the initial position of the cutters.

The kernolom scarf 22 (FIG. 3) is also locked with the latch 25 in the initial position.

I

During the rotation of the auger drill through the flange pipes from the surface, the axial load is transmitted to the core pipe 5 and the crown 6, periodic impacts along the axis of the well and in the bottom plane.

The interaction of static and dynamic loads on the bit ensures intensive destruction of the rock. The drilled rock is pushed back to the walls of the well, where it is picked up by a rapidly rotating auger and rises up into the hopper of a 3 jHe drill.

For more intensive cleaning. bottomhole zone from the drilled rock is desirable to supply a small amount of compressed air to the bottom

During the drilling process, a core of rock 29 is formed. The construction of the elements of the auger drill does not prevent its consumption or lifting, if this is necessary in the drilling process.

B. Cutting and scrapping of the core. The cutting and scrapping of the core is carried out automatically after the column pipe is filled with the core. Kern 29 rests with its upper part on the second 20, as a result of which, as the squalene is further deepened, the support pin 14 be piled up and carry away

ti I 3 with double-sided SLEDS 7.

At the same time ush 7 begin from 08

Turn the cutters 10 with the working part 11 toward the center of the well, as a result of which the core trimming begins. Since the rotation of the drill bit 6 is carried out due to lateral impacts in the intermittent mode, a dynamic load is also transmitted to the cutters, which contributes to intensive undercutting and, possibly, also to the core layer. On fkg. 2 shows the position of the elements of the core trimming mechanism at the final stage. At this moment (Fig. 4), the anvil 28 fixed on the rige 13 approaches the latch 25 and opens it, due to which the kernolom 11a .. the plate 23 is displaced by the spring 24 in the direction of L1 22M (Fig. 3 and 4) and is wedged between the core and the guides 22, and under the action of the impact mechanism of the auger drill, the wedge of the die is carried out with a large asha, which provides for the breaking of the core, in a section weakened by undercutting. When the tool is lifted, the core is securely held in the core tube by the cutters 11, the body 10 and the wedges 7.

Technical and economic efficiency of the proposed invention is to increase productivity by automating the work of trimming and core breaking | increasing the reliability of these works and eliminating accidents and complications associated with them. .

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VNIIPI Order 1558/37 Circulation 548 Subscription Branch PPP Patent, Uzhgorod, ul. Project, 4

Claims (1)

AUGER DRILL FOR A CORE SHOCK AND ROTARY DRILLING, including a rotation drive, a screw pipe with a hammer and anvil placed in it, connected to a drill string and a core pipe with a drill crown at the end, a wedge mechanism for core cutting with guides and wedges placed in them cutters, a mechanism for core breaking with a spiral guide and a roll block installed in it with the ability to move and fix with wedges of the trimmer, characterized in that 4TOj with the aim of increasing To ensure reliable operation, it is equipped with a spring-loaded base plate with a spherical thrust bearing and a thrust bearing, additional guides on which the base plate is mounted, fixed on the top of the core pipe, longitudinal guides with an emphasis on one of them connected with the base plate, and wedges made double-sided, connected with longitudinal guides and installed in the fur guides; lowering for core cutting with the possibility of axial movement and interaction with cutters pivotally mounted in the guides of the core cutting mechanism, and the latch ^{1 of the} mechanism for core breaking is installed with the possibility of interaction with the emphasis of the longitudinal guide. ί