SU901469A1 - Drill string - Google Patents

Description

The invention relates to the mining industry and can be used when drilling exploration wells in soft rocks using pneumatic impact mechanisms in flooded and dry sections.

Known pneumatic vibratory valves for drilling wells in soft rocks, consisting of a core receiver pipe, pneumatic shock mechanism, a column of gas supply pipes and a branch pipe [1].

The disadvantages of the known devices are the inability to ensure the vertical position of the core acceptor, nick with uneven bottom or bottom of the reservoir and reliable operation of the pneumatic impact mechanism.

Known drill, including a double column of drill pipes, pneumatic impact mechanism with a spool, a movable sleeve for connecting the column with a pneumatic impact mechanism and core pipe G 21 ·

The disadvantage of this device is the design complexity and, as a result, the unreliability in operation.

The purpose of the invention is to increase the reliability and productivity of drilling.

This goal is achieved by the fact that the coupling is equipped with a sleeve for connecting the inner pipe string with a spool, while the holes for spent gaseous agent are made in the sleeve.

In FIG. 1 shows a drill, a longitudinal section; in FIG. 2, 3 and 4, respectively, sections AA, BB and 8B in FIG. 1.

The drill consists of an upper adapter 1 with holes 2, connected to a double string of drill pipes, consisting of outer pipes 3 with locks 4 and inner pipes 5 with couplings 6. Outer pipes 3 of the drill string are rigidly connected to a movable coupling 7 freely positioned 3 901469 in the hollow connecting element 8 with a sliding seal 9, resting on the protrusions 10 on the body of the pneumatic impact mechanism. The inner pipes 5 are connected using a sleeve .11 with holes 12 through a sliding seal 13 with a nozzle 14 of the spool of the pneumatic impact mechanism 15. A pneumatic impact mechanism 15 is mounted above the core receiving pipe 16.

In the process of drilling, the coupling 7 zani4 contributing to the extraction of the core receiver pipe 16 from the well.

The proposed drill provides the creation of an axial load ₅ on the bottom by means of a drill string, contributing to an increase in the mechanical drilling speed and an improvement in the conditions of core formation.

Claims (2)

The invention relates to the mining industry and can be used in drilling exploration wells in soft rocks using pneumatic impact mechanisms in watered and dry cuts. Pneumatic vibrating strains for drilling wells in soft rocks are known, consisting of a core receiver, a pneumatic impact mechanism, a gas supply pipe string and a branch pipe 1. The drawbacks of the known devices are the impossibility of ensuring the vertical position of the core receiver with uneven bottom or bottom of the reservoir and reliable pneumatic impact mechanism. A drilling rig is known that includes a double string of drill pipes, a pneumatic impact mechanism with a slide valve, a movable sleeve for connecting the column with a pneumatic mechanism, and a core receiving pipe L L The disadvantage of this device is the design complexity and, therefore, unreliability in operation. The purpose of the invention is to increase the reliability of work and productivity of drilling. This goal is achieved in that the coupling is provided with a sleeve for connecting the inner pipe string with the slide, with openings for the exhaust gaseous agent in the sleeve. FIG. 1 shows a drill hole, a longitudinal section; in fig. 2, 3 and 4, respectively, sections A-A, B-B and B-B in FIG. 1. The drill string consists of an upper adapter 1 with holes 2 connected to a double string of drill pipe, consisting of outer pipes 3 with locks k and inner pipes 5 with sleeves 6. The outer pipes 3 of the drill string are rigidly connected to a movable sleeve 7, freely located in the hollow connecting element 8 with a sliding seal 9, resting with the projections 10 on the body of the air-impact mechanism. The inner tubes 5 are connected by a sleeve .11 with openings 12 through a sliding seal 13 to the nozzle 1A of the spool of the pneumatic impact mechanism 15. The pneumatic impact mechanism 15 is installed above the core receiver tube 16. During the drilling process, the coupling 7 occupies the lower position, resting with the projections 10 on the housing pneumatic impact mechanism 15 and passing through it the axial load on the core receiver tube 16. Compressed air from the compressor through the internal pipes 5 enters the pipe 14 of the hammer of the pneumatic impact mechanism 15, which clogs the core receiver pipe 1b to the ground. The exhaust air enters the annular space and out through the openings 2 into the atmosphere. After the core tube has been deepened to the required size, the pipe string is lifted up to the stop by the projections 10 of the coupling 7 into the upper part of the hollow connecting element 8. The branch pipe 14 of the spool of the pneumatic impact mechanism 15 moves upwards under the action of overpressure, as a result of which the striker strikes, directed up. 9 to assist in removing the core tube 16 from the well. The proposed drill string provides for the creation of an axial load on the face by means of a drill string, contributing to an increase in the mechanical speed of drilling and an improvement in the conditions of core formation. An invention drill bit comprising a double string of drill pipe, a pneumatic impact mechanism with a spool, a movable sleeve for connecting the column with a pneumopulary mechanism, and a core tube, characterized in that, in order to increase the reliability of operation and productivity of drilling, the sleeve is fitted with a sleeve for connecting the inner column pipes with a spool, with openings for the exhaust gaseous agent in the sleeve. Sources of information taken into account in the examination 1. Authorship Witness USSR 169461, cl. E21 B 49/02, 19b2. 2. Authors' certificate of the USSR № 679846, cl. G01 N 1/02, 1973 (prototype). / - 1l jL 5L " FIG. LA ffut.l , ,, -f " ±: Fig.Z