SU1602968A1 - Self-sealing core- and gas-taking tool - Google Patents

Abstract

The invention relates to mining and is intended for drilling with core sampling and preservation of formation media. The goal is to improve the quality of the core and gas. For this, on the inside of the upper adapter 8 there is a tamping mechanism in the form of a hollow body 24 with a closed shell 26 placed in its cavity with components of a quick-setting mixture, cutting elements 27 for opening the shell 26 and a pressure assembly above the shell 26. It consists of a pusher 28 and a piston 29 with a bypass channel 30 and with a saddle for the discharge valve 32 connected by a rod 33 of telescopically connected links. The volume of the space between the piston 29 and the pusher 28 is equal to the volume of the free space of the fluid injection channels in the interval from the housing 24 to the rock-breaking crown 2. The slotted connection in the adapter 8 and the connection of the links are made with shear locks of the initial position. The adapter 8 is free to rotate relative to the inside in its lower position. The volume of the mixture in the buffer fluid is adjusted so that the quick-hardening mixture fills the crown 2 inside and rises to a height of 50-100 mm outside. Snar d bottom sealed. Since the part of the hardened mixture directly in contact with the bottom and its sealing crown 2 are separated by a core holder, the separation of the projectile from the bottom is carried out without breaking the seal. In the process of lifting the washing fluid from the projectile flows through the hole. 6 Il.

Description

The invention relates to the field of mining, to technical means for drilling with coring and preservation of the formation medium.

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

Fig. 1 shows a general view of the projectile in section; FIG. 2 is a general view of the kerosene part in the section; FIG. 3 is a section A-A in FIG. 1; FIG. 4 is a section BB in FIG. Fig. 5 shows the lower part in a sealed state; FIG. 6 shows a rod of telescopic links.

The core shell contains an outer tube 1 with a rock-breaking crown 2 connected to the tube 1 by a sleeve 3 and having a petal corer 4

Inside the pipe 1, the core-receiver pipe 5 and the gas collector 6 with a suspension unit on the longitudinally-movable inner part 7 of the upper adapter 8, mounted in it with a flange connection with a shear lock 9 of the initial upper position, are placed with the possibility of longitudinal movement.

The suspension unit is formed by an adapter 10 with an insulated oil-filled chamber 11, in which spring-loaded springs 12 are installed with respect to part 7 of the support 13 of the core-receiving pipe 5, which cooperates with the fifth 14 and the cone 15, the support 13

0

five

0

50

has freedom of rotation relative to the core tube and gas collector

Bottom of the adapter 10 is attached to the housing 18 with the seal 17, holding and limiting the displacement of the cone 15 down

The cone 15 is located in the conical recess on the adapter 10 and, interacting with it, forms a normally open cone coupling, transmitting the rotation from the outer tube to the core receiver,

The chamber 11 is hydrostabilized due to the connection with the bellows 18,

The core tube 5 in the lower part is equipped with a stamping crown 19 with a protective cap 20, and in the upper part it communicates with the channels of the valve 21 through which the gas enters the cavity of the gas collector.

The closure element 22 of the valve 21 is held in the open position by a rod 23, kinematically associated with a mechanism (not shown), the movement of which is due to the relative displacement of the outer tube when the crown 19 contacts the bottom surface.

The snard is provided with a plugging mechanism in the form of a hollow body 24 fixed by part 25 on the inner part 7 of the upper adapter 8 with a closed shell 26 placed in its cavity (for example, made of polyethylene) with separated components of quick-setting mixtures (for example, MF-17 resin and oxalic acid hardener), cutting elements 27 to open the shell 26 and placed above the closed shell, 26 pressure assembly, consisting of the pusher 28, the piston 29 with the bypass channel 30 and the saddle 31 under the discharge valve 32. Piston 29 and push Spruce 28 connected rod 33 of telescopically associated shear retainer 34 units 35 and 36, the volume of the space between the piston 29 and the plunger 28 equal to the volume of free space channels, forcing fluid in the range of the hollow body 24 to rock-breaking 2 bits.

For the passage of the fluid being injected during drilling, the pusher 28, the body 24 of the part 25 and the part 7 are provided with holes 37, a gap 3 and channels 39 and 40, respectively.

The upper adapter 8 has freedom of rotation relative to the inner part 7 in the lower position due to the opening of the spline joint.

The core screen operates as follows.

After top-downing of the wells, the gas collector is closed, the valve is sealed in the upper part, and the internal cavities of the core receiver and the gas collector are filled with flushing fluid, valve 32 is missing.

Soft carbon drilling is carried out in the punching mode, for harder lithotypes and rocks - in a rotational way with zero or negative crown clearance 19. The advance adjustment is carried out automatically depending on the slaughter reaction.

The drilled core, pushing through the cap 20, enters the pipe 5. The extruded gas from the core enters the gas collector 6, accumulating in its arched part and displacing the liquid into the annular space. After drilling is completed, a load of 10-15 kN is created, with the result that the core is spread in the conical inner part and held by an annular collar in the crown 19.

After the core is jammed, the projectile is detached from the bottom, then re-installed on the face. A load of about 25 kN is created, and the shear clamps 9 are cut, the drill pipes, the grouting mechanism together with the inside of the projectile are raised above the face by + 100 mm. Due to the strength, friction on the walls of the wells and under

15

20

602968

dead weight outer tube

1 is displaced relative to the inside by the same distance. The crown, from 19, is pushed inside the crown 2, and the petals of the core 4 are shifted to the center. Then, valve 32 is discharged into the drill string, closing the channel 30 for the passage of flushing

50 of the fluid in the piston 29. The drilling pump is turned on and under pressure of the flushing fluid flowing through the drill pipes into the cavity of the housing 24, the piston is displaced downwards, pushing the sheath 26 through the rod 33 to the elements 27, which force the sheath to form in several places. The passage to the channel 39 of the part 25, the channel 40 and the annular space to the face, the resin and hardener are mixed. For the reaction time of the components, the drill string remains stationary. The movement of the mixture to the bottom is provided by the volume of industrial liquid in the space between

piston and pusher. When the pusher rests on the elements 27 by increasing the pressure of the flushing fluid on the piston 29, the retainer 34 is cut off,

30, the piston 29 is lowered, pushing the calculated volume of fluid into the annular space.

The volume of the mixture in the buffer fluid is adjusted so that the quick-hardening mixture fills the outer crown. inside and climbed to a height of 50-100 mm outside. Snar d bottom sealed. Since the part of the hardened mixture directly in contact with the bottom and its sealing crown are separated by the core, the projectile is detached from the bottom without sealing. In the process of lifting flushing

Claims (1)

dd the liquid from the projectile flows through the hole. Invention Formula 35 40 Sealed core tube containing an outer pipe with a rock-cutting crown and lobe cores, placed inside the outer pipe with the possibility of longitudinal movement of the core-receiving pipe, gas collector with valves and the valve control mechanism connected to the outer pipe, the upper adapter with the fixed pipe spline joint with longitudinal under the inner part and the suspension assembly with a supporting core tube which is spring-loaded relative to the inner part of the upper adapter, has a free rotation, characterized in that, in order to increase the quality of the core and gas, it is equipped with a grouting mechanism in the form of a hollow body fixed on the inner part of the upper adapter, with a closed shell placed in its cavity with components of a quick-hardening mixture, cutting elements for opening the shell and a pressure assembly arranged above the closed shell first as a pusher and the piston with a bypass channel with a saddle for a waste valve connected by a rod of telescopically connected links, the volume of the space between the piston and the pusher being equal to the volume of the free space of the fluid injection channels in the interval from the hollow body to the rock crown, the splinter connection in the upper adapter and the connection of the telescopically connected links, the stem is made with shear clamps of the initial position, and the upper adapter has the freedom of rotation relative to the inner part in its lower lying Zo .2 four/ -BUT Fig.d FIG. 5 FIG. B