SU142240A1 - Double columnar d - Google Patents

Description

Column shells of known structures are unreliable when operating in complex geological conditions — with varying hardness.

The main drawbacks of such projectiles are that when moving from soft and adult to hard, you need to change the tip, the core is not reliably captured, detached from the bottom and held during lifting inside the projectile, etc.

To eliminate these drawbacks, the described double core projectile is made in the form of lamellar sectors located at the cut-off core, in the socket of the sleeve funnel installed in the cavity, fixed in the longitudinal direction on one side with an annular collar crown, and on the other end of the core tube.

The drawing shows the proposed projectile during drilling (left) and during the failure of the core (right).

The double core dashboard has a telescopic device. The outer movable assembly consists of a crown 1 with incisors 2, a core tube 3 and a housing 4. The inner assembly consists of a cup 5, a core receiver 6 6, an adapter 7 of the adjusting screw 8 of the sub housing 9 and a spindle 10. The adapter 11 is screwed on the upper part of the spindle with cylinder 12.

The core receiver consists of two semi-cylinders 13 and 14, on the lower part of which the cup 5 is screwed, and on the top there is a split head 6, also consisting of two halves screwed into the adapter 7. The spindle 10 has two protrusions entering the slots of the housing 4 than the transmission of torque to the projectile and the mutual axial movement of the spindle and the housing are provided.

The locking mechanism consists of a spring 15, a spool 16 and a latch / 7 with a plug 18. When the core projectile is lowered into the well, the mechanism holds the core 19 sectors in the gap between the casing 142240 2 and the cup 5. When the projectile is raised, the sectors 19 are released. -

Kernorv, a- |; -electric device consists of four lamellar sectors 19 installed in the sockets of the housing 20, which is inserted into the crown Y and freely rotates in the annular bore.

During the descent, the node is held by retainer 17, and the sectors are in the gap between the crown / and cup 5. The bottom of the well is flushed, a 2J ball is dropped into the pipes (position shown in the drawing) and drilling begins. In the process of drilling, the core receiver, the receiving cup and the core break sectors do not rotate due to the low friction of the ball 22 and the large friction of the core. The load on the bottom when drilling is transmitted from the rods to the adapter // n cylinder 12, then through the collar of the housing 4 to the outer core tube 3 and the crown. After drilling is completed, 1nar 23 is dropped into the pipes, which closes the entrance to the spool 16. Under fluid pressure, the spool compresses the spring and lowers, with the retainer sinking into the outer groove of the spool and the moving and stationary units are disconnected. Since the axial channel is blocked by the ball 23, the liquid is directed through the channels 24 to 25 and it tends to push the body 4 out of the cylinder / 2, as a result of which the pressure on the pump rises sharply. They raise the projectile over the face by 6-7 cm and the pressure drops, which indicates the release of the core-disruptive sectors from the gap; breaking the core and holding it inside the shell. After the pump stops, the spring 15 lifts the spool 16 to the initial position and the lock falls into the annular boring on the housing 4, the movable assembly on the spindle 10 locks. After lifting the projectile to the surface, the core tube 3 is unscrewed from the housing 4, then the core receiver is unscrewed from the adapter 7. Lay the core receiver horizontally, remove the half-cylinder 14 and remove the core.

Subject invention

A double core drill to obtain a core when drilling for minerals, using two core pipes inserted one into another, in the gap between which walls there is a core breaking device, automatically cutting off the core when shearing the pipes relative to each other and controlled by starting and locking ball mechanisms, characterized in that, in order to increase the reliability of the core device, when drilling intermittently hard rocks, it is made in the form of lamellar sectors located when cutting off the core in the socket of the sleeve installed in the cavity, fixed in the longitudinal direction on one side by a ring collar of the funnel, and on the other side - by the end of the core tube.