SU102992A1 - Coring collector - Google Patents

Description

Known core samplers with cutting and supporting core devices have the following main disadvantages:

a) cutting and supporting devices in the process of drilling are not protected by anything from cuttings, possible friction and damage to them with core;

b) to actuate a cutting device, it is necessary to rotate the string of drill pipes to the left or simultaneously use two columns of drill pipes: one for drilling and the other for trimming the core.

The pick-up device according to the invention eliminates these drawbacks due to the fact that during the burpee process, the undercutting devices are located inside the collet 1; there are 1 recesses made on the inner surface of the outer pipe of the kerco grab.

A distinctive feature of a core sampler is that its undercutting device completely overlaps the inner tube for the time of its deepening, which also serves as a core tube.

To actuate the undercutter, the inner pipe rises until the device is completely exposed by turning the drill pipes to the left side at a certain angle. After that, the drill pipes are rotated to the right side and the elements of the ycTpoiicTBa undercut are pushed out of the recesses to the direction of the center of rotation of the coring picker, 1), without cutting the core in the radial direction.

The ejection of the elements of the undercutting device is carried out by reciprocally rotating the body of the steam pipe of the sump relative to the crown.

Fig. 1 shows the image longitudinally 1) without a core picker, with the right side of the section showing the relative position of the outer and inner tubes during core drilling, in the left side when cutting the core; in fig. 2 - nsrechp 1 cut by (AA) undercutter dnafragmentogo tina in a closed pololsenpp; in fig. 3 - that a: e, in the open on. 1ol; enip; in fig. 4 - section along (AA) of the cutting device of the incisal type in the closed position; in fig. 5 is the same open position: in FIG. 6 - | 1 cut on (AA) of the undercut device of the cable type in the closed position; in fig. 7 is a section through (BB) in FIG. one; in fig. 8 shows a section but (BB) in FIG. one.

The square collector consists of a slurry pipe (1), a body (2), 1 ring, a nozzle pipe (:-), a body (4) cutting device, a barrel (5) with cutters (6), a ring (71 cutting tools (8), a shoe (9) 1 internal core-corneous pipe (10) and a mechanism for switching the drive and lifting the kerpo-receiver pipe.

The rotation of the core collector is connected to the drill pipe (11) via a drill pipe (11). A lead (12) rests on a key (13), reinforced in the base (2).

Lifting the core lifter pipe (10) to release the scoring device (8) J Occurs as a result of screwing the rod (14) connected to the core tube into the nut (15) secured in the casing (2) with multi-pass threading.

The upper position of the rod (14) is fixed by a spring lock (16).

The cutting device is made in three versions; diaphragm for loose rocks (Fig. 2 and 3), incisal for rocks (Fig. 4 and 5) and cable length for clay rocks (Fig. 6).

In the process of core drilling, the core-receiver tube (10) together with the shoe (9) is lowered down and closes the undercutter (8). In the case of using a cutter;) 01 cable type, cables (17), ONE ends attached to the body (4), and the other ends to the ring (7), oxiiaTbiBaiOT outer surface of the shoe (9) and rotating the bodies (4) are chambered for co6oii, the ring (7) II is screwed to it by a Kyronka (o), causing it to rotate with the body. Simultaneously, through the parts (14), (15), (2), (3) and (4), axial force is transmitted from the drill pipes (11) of the column to the crown.

After the crown has mashed the core, it is cut, for which the rotation of the core collector is suspended and the drill pipe string is rotated to the left at a certain angle, before the spring-loaded lock (16) enters the recess for the key (13). The axial pressure on the crown is not removed in this case.

By turning the key (13) to the left, the carpopeen tube (10) rises and the shoe. (9) it exposes iodic device. After this, there is a knockout from the core cutter.

In the process of trimming, the crown (6), resting against the bottomhole, performs the brake, and the rotating pipe (3) pulls the cables (17), causing them to grip and the radial) cut the rock. Natu

the cables force the crown to rotate, but braking it on the bottom allows the cables to penetrate deeper and deeper into the rock to be completely separated, forming a supporting mesh under the plane of the cut.

Cutting and diaphragm cutting devices (figures 2, 3, 4 and 5) work in the same way as cable. The only difference is that the first one is released by lifting the inner tube (10), the incisors (18) or parts of the diaphragm (19) are pushed out of the sockets by the cams (20) with which the braked crown body is equipped. As a drive for a core sampler, any rotary drilling and flushing machines can be used. Drill pipes for rotating the pickups are conventional with a pin or socket coupling.

P p d d-M e t and z o b e te p e

Claims (2)

1. A coring picker with a scoring device, the cutting elements of which are pushed into the working position by moving the outer tube relative to the crown, acting with the right wrap (the depth of the drill pipe is different, and in order to localize the scoring device for recess time, it completely overlaps the inner pipe of the core sampler, which is achieved by installing this pipe before lowering the core sampler into the well. 2. The chooser of claim 1, wherein the inner pipe of the core picker is moved upwards by turning it to the left in a stationary, 1 st, multi-pass cut to activate the undercutter.