SU1059115A1 - Automated underwater drilling unit - Google Patents

Abstract

UNDERWATER DRILLING AUTOMATED INSTALLATION, containing a base with retractable supports, a mast with a movable rotator, drill pipes and core receivers placed in a two-section cassette, one section of which has locking locks to hold the drill pipes, and the other locking locks to hold the receiving receivers, who hold the locks in place and hold the receivers to hold the drill pipe, and hold the locking hooks to hold the receptacles and hold the locks to hold the receivers. drill pipe, characterized in that, in order to increase the productivity of the installation by reducing the drilling time with coring, the section with locking locks and core drills have locks to hold drill pipes. (L

Description

The invention relates to the field of mining, in particular to exploration drilling in the exploration and exploration of mineral deposits on the shelves of the seas.

An automated submersible drilling rig is known, which includes a base, a mast, a movable rotator, a feed mechanism, a core tube, a cassette with test receivers and a mechanism for extracting test receivers 1.

The disadvantage of this drilling machine is the limited depth of drilling, equal to the length of the core pipe. In addition, the samples have an impaired structure, since the sampling takes place after the drilling process.

A well-known underwater drill automated installation containing a base with retractable supports, a mast with a movable rotator, drill pipes and core receiver, placed in a two-section cassette, one section of which has locking locks to hold the drill pipe, and another - locking locks to hold the core receivers, mechanism for removing drill pipes from drill pipe 2.

A disadvantage of the known installation is the waste of time, expressed in the fact that, depending on whether the drill pipe is growing or when the core tube is being replaced, one or another section of the cassette is fed to the wellhead.

The purpose of the invention is to increase the productivity of the installation by reducing the drilling time with coring.

This goal is achieved by the fact that in an underwater drilling rig, containing a base with retractable supports, a mast with a movable rotator, drill pipes and core receiver, placed in a two-section cassette, one section of which has locking locks to hold the drill pipes, and the other - locking locks for retaining core lifters, a mechanism for extracting core lifters from drill pipes, a section with locking locks for core lifters has locks to hold drill pipes.

FIG. 1 shows an underwater drill; automated installation; general view; in fig. 2 - the same, side view.

The subsea drill automated installation contains a base 1 with sliding supports 2, a mast representing two hydraulic cylinders 3 of supply, on the rods 4 of which a yoke 5 with a rotator 6 located on it is fixed, a two-section cassette 7 located in

holder 8. Cassette 7 has two sections, one

9c with locking locks to hold the drill pipes 10 and a second 11 with locking locks to simultaneously hold the core receivers 12 and the drill pipes 10. The cassette 7 is mounted on the guides 13 of the longitudinal cassette feeding mechanism, and the yoke 8 is on the transverse guides 14 with transverse cylinders 15 filing cage.

The mechanism for removing core tubes from drill pipes is the guides 16 through which the carriage of the core receiver extracting unit 17 moves. The unit 17 is fed by a displacement hydraulic cylinder 18. In the carriage of the extraction unit 17, a catcher 20 is located in the holder 19, apart from the support of supports 2, a leveling system, a pump 21 for supplying a flushing fluid and a hydraulic catch 22 of the drill string are also arranged. To the actuator 6 is attached leading rod 23.

Subsurface drilling automation installation works as follows.

After descending and leveling the unit at the bottom of the production, the leading strand 23 is lifted to the extreme upper position, the cassette 7 is fed longitudinally one step, the locks of fastening of the first drill pipe 10, which is a core with rock-breaking tool, are turned off; The first drill pipe 10 is lowered through the hydraulic grip of the column 22 to the ground, while locks are turned off, holding the first core receiver 12, which falls into the core pipe and is fastened there by its snaps.

The grip of the column 22 is turned on and clamps the column pipe, the driving rod 23 is lowered and screwed into the column pipe. The hydraulic grip is turned off, the pump 21 is turned on, which supplies the flushing fluid to the bottomhole, the rotation and supply of the drill string is started. The drilling process begins.

After bouting the first drill pipe

10, the drilling process is stopped, the flush pump 21 is turned off, and the hydraulic catch 22 of the drill string is activated. The left rotation of the rotator 6 is turned on, the leading rod 23 is unscrewed from the core tube and the hydraulic cylinders 3 feeds up to the extreme upper position. The core receiver extraction unit 17 is fed until the safety device 20 is on the well axis. There is a descent of the catcher 20, the capture core receiver 12 and removing it from the well. The core receiver 12 is installed in its place in section 11 of the cassette 7, the safety device 20 at the same time

Claims (1)

AUTOMATED UNDERWATER DRILLING RIG, comprising a base with extendable supports, a mast with a movable rotator, drill pipes and core receivers located in a two-section cassette, one section of which has locking locks to hold the drill pipes, and the other has locking locks to hold the core pickups, drill pipes, characterized in that, in order to increase the productivity of the installation by reducing the time of drilling with coring, section with locking locks for core receiver has locks for holding drill pipes