SU1404632A1 - Drilling rig - Google Patents

Abstract

The invention relates to mining, in particular to the drilling of shallow large diameter wells, and makes it possible to simplify the construction of a drilling rig. It includes a rotator 1, a feed assembly 4 and a drill string that contains a carrier cable 6 associated with a rock cutting tool (PI) 7, and pipe sections (CT) 10 with smooth nipples and couplings at their joints. Moreover, the ST 10 is made in the form of pipes arranged in parallel and rigidly connected to each other, and the gland of the column has a flange 5 that responds to them. The rope 6 is placed between the pipes 10, and the rotator 1 is made in the form of a reversing mechanism, for example, a gear-type driven. In the process of drilling, the PI 7 performs reverse movements. Its delivery to the bottom is carried out by the node 4. As the well deepens by one CT 10, the oil seal is raised and the new PT 10 is put on. When the PI 7 drill is lifted, the string is held and the oil seal is disconnected from it. Further, the PI 7 is raised by an amount of CT 10 picked up by an elevator. The descent of PI 7 is carried out in reverse order. 4 il. I (L

Description

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The invention relates to the field of mining, and more specifically to the drilling of shallow wells of large diameter.

The purpose of the invention is to simplify the construction of the drilling rig.

FIG. 1 shows a drill installation, general view; in fig. 2 - separate sections of pipes, general view; in fig. 3 - the same, side view; in fig. 4 is a section A-A in FIG. 2

The drilling rig consists of a rotator 1, made in the form of a reversing mechanism with bristles 2 and a toothed rack 3, with drive cylinders located at opposite ends. The rotator is connected to the tool feeding unit 4 by means of a traverse with a bearing unit. From the lower end of the rotator is attached gland flange 5 with bushing. The gear 2 and the gland flange 5 have radial grooves into which the carrying rope 6 enters, at the bottom end of which a rock-destroying tool 7 is hung, equipped with a bottom-hole packer 8. Around the carrying rope 6 are parallel to each other and rigidly connected to each other , for example, a partition 9 of the pipe section 10, connected by means of smooth couplings. The pipes at one end have smooth nipples 11, and at the other end are smooth sleeves 12, as well as protrusions 13 at the upper ends to be lifted by the elevator of the lifting winch 14. To remove the drill pipes, the installation is equipped with a tube holder 15 with folding sectors 16 fixed in the working position x (clamps not shown). Passage nozzles of the flange 5 are made in response to the connecting elements of the pipe 10.

Burov plant works as follows.

In the process of drilling with the help of the proposed installation, the rock-destroying tool 7 does not rotate, but performs reversible movements, as the shchestern 2 performs such movements under the influence of the rack 3, which is set in motion by the hydraulic cylinders. The winch of the carrying cable 6 is braked, and the tool is fed as the well is deepened by the feed unit 4. The presence of the bottom-hole packer 8 allows for the cleaning of the bottom of the well by a direct or reverse flow of the cleaning agent. As the well deepens by the size of one section of pipe 10, the oil seal is raised by means of the tool feeding unit 4 and the new pipe section 10 is put on by sleeves 12 on the nipple

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l 11 previous pipe section. Further, the drilling process is repeated. The layout of the rock-destroying tool can be different (pneumatic impact, hydroshock, sharoshechna, carbide, diamond).

The tool is raised in the following order.

The drill string, consisting of several rigid sections of pipes 10 with a supporting cable 6, adheres in the well to the protrusions 13 by sectors 16 of the tube holder 15 due to the fixation of the sectors in the lower position. The tool feed assembly 4 is disconnected from the drill string and then the rotator 1 with the oil seal and the tool feed assembly 4 are retracted from the wellhead to the desired value. At the same time, the carrying cable 6 remains in place, since the barb 2 and the gland have a radial slot. Subsequently, with the help of a lifting winch 14 of the carrying cable 6, the tool is lifted by the size of the section of pipe 10, and the downstream sections are held in the well in the manner described. The raised section is picked up by the elevator of the lifting winch 14 and stacked on the rack. In the future, the tool lifting process continues until only rock cutting tool 7 with a bottomhole packer remains on the carrier cable 6.

The tool is lowered into the well in reverse order.

The tool launching process in the proposed drilling rig can be easily automated and is performed in the continuous tracking mode of the tool.

Claims (1)

Invention Formula A drilling rig that includes a rotator, a feed unit, a drill string containing a carrier cable associated with a rock demolition tool, and pipe sections with smooth nipples and couplings at their joints, characterized in that, in order to simplify the design, the sections the pipes are made in the form of pipes arranged in parallel and rigidly connected to each other, the gland has a flange that meets them, and the supporting cable is placed between the pipes, and the rotator is made in the form of a reversing mechanism, for example, a gear-rack type with a hydraulic cylinder vym drive. 12 h il. J: FIG. 2 FIG Fig.Z