SU1532711A1 - Expander for drilling ascending holes - Google Patents

Abstract

The invention relates to the mining industry and can be used for penetrating wells with a bottom-up method. The goal is to simplify the design. The expander includes the upper 1 and lower 3 cases (K) with rock-cutting tools (I) 2 and 4 and the drive shaft 5. The upper K 1 is mounted on the shaft 5 with the possibility of axial movement, and K 3 - with the possibility of rotation and spring-loaded. In the internal cavity K 3, horizontal 8 and vertical 9 grooves (P) are made communicating with each other. The spring mechanism for moving K 1 consists of a spring 10 and locking lugs 11 attached to the lower end of K 1 and placed in P 8 or 9. Rotation of the shaft 5 boils the first phase of the rising I 2. The axial load is transmitted through K 3, stops 11 and K 1. After the I 4 stops in the bottom of the second phase, the K 3 rotation stops, the stops 11 rotate in P 8 and are set above P 9. When the second phase 4 is drilled, both K 1 and 3 fold, and the stops 11 slide in P 9. the next drilling of the first phase, the expander is lowered and K 1 and 3 occupy the initial position. 4 il.

Description

The invention relates to the mining industry and can be used for penetrating wells with the bottom-up method.

The purpose of the invention is to simplify the design.

FIG. Figures 1 and 2 show the expander in different stages of operation, a longitudinal section; in fig. 3 shows section A-A in FIG. one; in fig. 4 shows a section BB in FIG. 2

The reamer for drilling of rising wells includes an upper body I with a rock-breaking tool 2, a lower body 3 with a rock-breaking tool 4 and a drive shaft 5. The upper body 1 is mounted on the drive shaft 5 movably by means of a splined joint. The lower body 3 is rotatably mounted on the drive shaft 5 by means of the thrust bearing 6 and spring-loaded with respect to the drive shaft by a torsion spring 7. In the inner cavity of the lower body there are horizontal 8 and 9 vertical grooves connected to each other. The spring mechanism for moving the upper body 1 is made of a spring 10 placed in the internal cavities of the body 1 and 3, and locking lugs 11 attached to the lower part of the upper body 1. The foot 11 in the free position of the expander is placed in the groove 8, and in the folded position in the grooves 9. The limiter for moving the upper housing 1 is a ring 12 attached to the shaft 5.

The expander for drilling the rebels in works as follows.

when the first phase is drilled by the tool 2 of the upper housing 1 (Fig. 1), the torque is transmitted to the housing 1 through the splines of the drive shaft 5, and the pressure force from the drive shaft 5 through the thrust bearing 6 and the housing 3 interacting with the bottom walls of the horizontal grooves 8 with lugs 11. When the case, the body 3 is rotated relative to the drive shaft 5 under the action of the spring of the torsion 7 and the lugs 11 interact with the side walls of the slots 8 (Fig. 3).

At the end of drilling, the rock cutting tool 2 of the first phase with the coring drill tools 4 rests on the face and brakes relative to it, and the body 1, continuing to rotate with the drive shaft 5, twists the spring 7 relative to the body

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3. In this case, the stops 11 move along the horizontal grooves of the stationary body 3 and abut against the walls of the grooves 8 (FIG. 4), after which the body 3 begins to rotate with the body 1 and the drive shaft 5, the second phase of the ascending drilling tool is drilled 4. Spin the moment from the drive shaft 5 to the housing 3 is transmitted through the stops And interacting with the walls of the vertical grooves 9, and the pressure force to the housing 3 from the drive shaft 5 is transmitted through the thrust bearing 6. As the drilling tool rises, the housing 1 continues to abut level tool 2 in the face, moves the stops 7 through the grooves 9 and compresses the spring 10. When the housing 1 rests with the stops 11 into the bearing 6, having selected the freewheel, they enter the drilling, except the drilling tool 4 and the tool 2 of the housing 1 (Fig. 2 and four). The load on the rotator shaft of the drilling machine (not shown) increases, after which the extender is fed down until the body 1, moving the supports 11 along the grooves 9, rests into the grooves 8. At the same time the body 3 is under the action of the spring 7 is rotated at a certain angle by moving the grooves 9 relative to the stops 11 until the walls of the grooves 9 come into contact with the stops 7 (Figs. 1 and 3), after which the revolver is drilled in the previously described sequence (first with the drilling tool 2 of the housing 1 and then 4 body 3).

Claims (1)

Invention Formula An expander for drilling of revolving wells, comprising an upper housing with a rock destructive tool, mounted on a drive shaft with the possibility of axial movement, a spring mechanism for moving the upper housing with locking lugs, and a pre-loaded lower housing with a rock fracturing tool, mounted on a drive shaft, characterized in that in order to simplify the construction, the lower housing is mounted on the drive shaft so that it can be rotated, in the inner cavity of the lower housing horizontal and vertical cial grooves communicating with each other, and locking abutments secured to the bottom of the upper housing and mounted for movement in the slots. 01 and eight } IZCS eleven Fig.Ch