SU1682520A1 - Core equipment - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to mining, to tools for drilling with coring. The aim of the invention is to increase the yield of the core. The core projectile contains an outer tube with a chisel and an internal support socket. The core receptacle is fixed to the support nest with a core rotor at the bottom end. A removable drainage unit is located on the support socket, which is connected to the cavity of the core tube by a drainage channel. The body of the drainage assembly has a gripping head, an annular groove on the outer surface under the gripping head, and a downstream section of conical shape with a diameter decreasing downwards. The outlets of the branch duct are located in the annular groove, and the body in the interval of the conical section is made of elastic material. The flexibility of the conical section ensures that the drainage unit can easily overcome the lock zones with protrusions in the drill pipes and reach the nest. An upward flow of drilling fluid created in the pipe cavity facilitates the movement of the core drilled with chisels into the pipe cavity. 2 Il. sl C

Description

FIELD OF THE INVENTION The invention relates to mining, to tools for drilling with coring.

The purpose of the invention is to increase the core yield.

FIG. 1 shows a coroner, longitudinal section; in fig. 2-drainage unit, longitudinal section.

The column projectile consists of an outer pipe 1 with a chisel 2 and with an internal support slot 3 connected to the pipe 1 by an adapter 4 having centering fins 5. The support slot 3 is made with peripheral through channels 6. A core is attached to the support slot

pipe 7 with core 8 at the lower end. On the support collar 3 a removable drainage unit 9 is placed in the housing 10 with a gripping head 11, an annular groove 12 under the gripping head and with a downstream section 13 of conical shape with a downward decreasing diameter. The housing 10 has an outlet channel 14 communicating with the cavity of the core-receiving pipe 7. The outlets 15 from the channel 14 are located in an annular groove 12, and a check valve 16 is installed in the lower part of the channel. The housing 10 in section 13 is made of elastic material.

00

you hear about

The columnar works as follows.

At the bottom of the projectile is lowered onto the drill pipe without a drainage assembly. At the same time, the drilling fluid in the well freely flows from the well through the core tube 7 and the gap between the pipes into the drill pipes (not shown).

When the projectile reaches, by circulation of the drilling fluid, the cavity of the core-receiver tube 7 is cleaned of sludge, the circulation is stopped, and the drainage unit 9 is lowered into the pipe cavity. .

When the projectile is rotated with the bit 2 and the solution is pumped to the bottom, the drainage unit is pressed tightly against the nest 3, and the head 11 under the action of the flow oscillates in the radial plane. Under the head 11, a vacuum is created due to the flow of a high-speed annular jet into the annular space between the surface of the housing 10 and the walls of the adapter 4 and further into the expanding space between the segment 13 and the convector s 4 of the adapter. solution that facilitates the movement of 2 core drilled with chisels into the cavity of pipe 7. The vibrations from the top of pipe 7 generated by the drainage unit also contribute to x head 11, is in this case the decoupling striker vibrator. After filling the core tube 7 with the core, the shells are lifted to the surface. In this case, the core-breaker 8 tears the core from the bottom and holds it when lifting, and the check valve 16 closes the cavity of the core-receiving tube 7 from above, preventing the core from being washed away with the solution.

Claims (1)

Claims of the invention A columnar containing an outer pipe with a chisel and an inner supporting nest having peripheral through channels fixed on the supporting nest of a core receiver with a core center at the lower end and removable a drainage unit placed in a housing with a gripping head on a support nest and communicating with the core tube cavity to the drainage channels, characterized in that, in order to increase the output the core, the body of the drainage unit is made with an annular groove on the outer surface under the gripping head and with a downstream section of conical shape with a diameter decreasing from top to bottom, the outlets of the branch duct are located in the annular groove, and the body in the interval of the conical section is made of elastic material. eleven 12 sixteen