RU2235848C2 - Projectile for carrying out drilling with broken rock transportation by reverse flow of flushing agent - Google Patents

Abstract

FIELD: mining industry, particularly drilling equipment.

SUBSTANCE: projectile comprises double column with outer and inner pipes and boring head. Arranged inside outer pipe is rock-receiving collector having inlet and outlet orifices and channels for flushing agent inflow. Boring head is connected with outer pipe and has channels for rock communication with inlet orifice of rock-receiving collector. Channels for flushing agent inflow are defined by concave and convex spherical surfaces, which pass into cylindrical annular nozzle. Radial channels formed in rock-receiving collector connect channels for flushing agent inflow with inlet orifices of rock-receiving collector. Cylindrical annular nozzle communicates with outlet orifice of rock-receiving collector.

EFFECT: increased efficiency of well bottom flushing.

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Description

The invention relates to drilling equipment, specifically to shells for drilling wells with continuous transportation of the destroyed rock to the surface by a stream of treatment agent.

Known for the closest analogue adopted for the prototype, a projectile for drilling with transportation of the destroyed rock by the reverse flow of the treatment agent, containing a double column with outer and inner pipes, a rock-receiving manifold with inlet and outlet openings, input channels of the treatment agent, a crown connected with an external pipe and having pedigree channels in communication with the inlet of the rock receiving collector (a.c.SSSR No. 1802078, class E 21 B 25/00, 1990). In this drilling apparatus, the channels of the treatment agent carry out only the function of turning the stream of treatment agent from the annular channel (between the outer and inner pipes) into the central channel. The destruction of the destroyed rock occurs only due to the flow of the cleaning agent.

The process of removing the destroyed rock (cleaning the bottom of the well) is not effective enough, because this device does not provide a sufficiently high upstream speed of the treatment agent.

The objective of the invention is to increase productivity by increasing the efficiency of cleaning the bottom of the wells.

To solve this problem, in a drill for transporting destroyed rock by a reverse flow of a cleaning agent containing a double column with an external and internal pipe, a rock receiving manifold located inside the external pipe with inlet and outlet openings, input channels of the cleaning agent, a crown connected to the external pipe and having rock channels in communication with the inlet of the rock receiving collector, the input channels of the cleaning agent are formed by convex and concave spherical surfaces passing into a cylindrical annular nozzle in communication with the outlet of the rock receiving collector, in which radial channels are made connecting the input channels of the cleaning agent with the inlet of the rock receiving collector.

The invention is illustrated in the drawing.

The drilling projectile includes a double column with an outer pipe 1 and an inner pipe 2. A rock collector 3 with an inlet 4 and an outlet 5 is located inside the outer pipe 1. The channels 6 for entering the treatment agent are formed by a convex spherical surface 7 and a concave spherical surface 8, turning into a cylindrical nozzle 9 in communication with the outlet 5 of the manifold 3. In the manifold 3 there are radial channels 10 connecting the channels 6 of the input of the cleaning agent with the inlet 4 of the manifold 3. The crown 11 is connected to the outer pipe 1 has pedigree channels 12 in communication with the inlet 4 of the manifold 3.

The present invention allows to solve the problem.

Indeed, the implementation of the channels 6 input cleaning agent in the proposed form provides, in addition to the function of turning the flow of the agent, an additional function of the ejector. The flow of the cleaning agent, under pressure, passing through the channel 6 formed by the spherical surfaces 7 and 8, and the cylindrical nozzle 9, accelerates to a high speed, respectively, the pressure of the agent flow decreases and becomes less than in the cavity 4. Then there is suction (ejector function ) a cleaning agent together with the destroyed rock from the bottom of the well, forming a reverse flow. Thus, the channels 6 form an ejector, which increases productivity by increasing the efficiency of cleaning the bottom of the well.

The device operates as follows.

The cleaning agent enters through the annular channel between the outer pipe 1 and the inner pipe 2 through channels 6 into the cavity 5, and through channels 10 into the cavity 4. Through the rock channels 12 of the crown 11, the sludge and the destroyed core rocks enter cavity 4 and then into cavity 5 , and then along the inner pipe 2 to the surface. Channels 6, performing an additional function of the ejector, provide an increase in the absorption of the treatment agent along with the destroyed rock from the bottom of the well, thereby increasing productivity.

Thus, the proposed drilling tool ensures the achievement of the task - an increase in productivity by increasing the efficiency of cleaning the bottom of the well.

Claims (1)

A projectile for drilling with transportation of the destroyed rock by the reverse flow of the cleaning agent, comprising a double column with an external and internal pipe, a rock receiving manifold located inside the external pipe, inlet and outlet openings, input channels of the cleaning agent, a crown connected to the external pipe and having rock channels communicated with an inlet of the rock receiving collector, characterized in that the input channels of the cleaning agent are formed by convex and concave spherical surfaces that turn into qi indricheskoe annular nozzle, in communication with the outlet manifold porodopriemnogo defining a radial channels connecting the input channels with a cleaning agent inlet manifold porodopriemnogo.