SU1606683A1 - Fishing downhole device - Google Patents

Abstract

The invention relates to the mining industry and is intended to eliminate accidents with pipes, the upper end of which is deflected from the center of the well bore. The goal is to increase the reliability of the device if it is necessary to maintain a flow channel in it and to carry out subsequent fishing operations. Above and below the radial opening 3 of the housing (K) 1 of the device are located internal annular shoulders 5 and 7. Between the shoulders 5 and 7, a sleeve (B) 8 is installed with axial displacement with a saddle under the dowel plug (BP) 9. In the upper position B 8 closes the channel 3 K 1. To fix the B 8 in its upper position in K 1, the locking element 6 is located. In B 8 it can interact with the collar 5 K 1 in its upper position to unlock the BP 9 there is a row of rotary on the axis 11 in the transverse planes of locks 10 for fixing in working position BP 9. Fixi ry 10 at the moment of ingression PD 9 are pivoted at 8 on the axis 11. When aligning grooves 15 on the outer surface of the PD 10 with clamps 9 past returned to its original position, fall into the groove 15 and the axial bore 2 K 1 overlaps. When the BP 9 moves upwards, the B 8 moves with it to the collar 5. The locks 10 rotate on the axles, exit the groove 15, and the BP 9 is removed to the surface. The element 6 at the same time fixes In 8 in the top position. 3 il.

Description

The invention relates to borehole fishing tools, and more specifically, to devices used to eliminate accidents with pipes, the upper end of which is deflected from the center of the wellbore and is, for example, in a trench or cavity.

The purpose of the invention is to increase the reliability of the device if it is necessary to maintain a channel in it and to carry out subsequent cognitive operations.

FIG. Figure 1 shows the SCRP safety device in the working position, longitudinal section; Fig.2-section aa in fig. one; in fig. 3 - the same, after blocking the radial hole and removing the rejected plug, a longitudinal section.

The wellbore catching device consists of a housing 1 with an axial channel 2 and a radial hole 3 with a diffuser 4. On the inner surface of the housing 1 above the radial hole there is an upper inner ring shoulder 5. In the body of housing 1 there is a radially spring-loaded locking element 6, Under the radial bore, the housing has an inner annular shoulder 7. In the case there is a sleeve 8 with a saddle under the recessed plug 9. In the upper part of the sleeve 8, clamps 10 are installed, which have beveled edges and are swivel on the axis 11 in p torsion springs 12 on the outer surface of the sleeve 8 and a groove 13 into which the fixing element 6 is in the upper position of the sleeve fixate the sleeve 8 to 8. The recess plug 9 has a head 14 and a groove 15 on the outer surface B of the radial The hole 3 is fitted with a nozzle 16 having sealing rings 17. The sleeve 8 is also provided with sealing rings 1-8.

The fishing device is operated after it;

The drill pipes are screwed on top of the housing 1, and a gripper assembly (not shown) below. The axial channel 2 of the housing 1 is open during this period, and the sleeve 8 is in the lower position. After the tool is lowered to the top of the emergency pipes, the well is flushed. Then a plug 9 is dropped into the drill pipe, which, after reaching body 1, sits on the saddle. The clips 10 at the time of entry of the plug 9 into the sleeve 8 are turned on the axis 11 due to their chamfered edges. When combining the groove 15 of the plug 9 with the clamps 10, under the action of the spring of the torsion 12, they return to their original position and enter the groove 15. The axial channel 2 of the housing 1 thus overlaps.

A flushing fluid is supplied, which, having expired, creates a reactive force and deflects the sub from the axis of the well. Having turned the pipes, they are caught by the gripping unit, for example, by a tap, into the emergency pipe. After connection with the emergency pipe, the plug 9 is removed by the head 14, for example, with a slip. When the tube 9 moves up, the sleeve 8 moves

together with the stopper 9 to the protrusion 5. Due to the inclined surface of the protrusion 5, the latches 10 are rotated on the axle 11 and out of the groove 15 of the stopper 9. Next, remove the stopper 9 to the surface. The locking element in this case falls into the groove 13 of the sleeve 8, fixing it in the upper position. The sleeve 8 overlaps the radial hole 3 After the release of the axial channel 2, it is possible to flush through the emergency pipes and perform geophysical work in the cavity of the drill pipe

Claims (1)

Invention Formula The skayzhinnoe fishing device, which includes a housing with a radial hole and internal annular collars located above and below the radial opening, installed between the hull flanges - with the possibility of axial 0 five 0 displacement of the sleeve with the saddle under the rejected plug and the locking element located in the housing with the possibility of fixing the sleeve in its upper position, characterized in that, in order to increase the reliability of the device if it is necessary to keep the flow channel in it and to follow operations, it is equipped with a number of latches made in the transverse plane for fixing in the working positions of the waste plug and mounted on the sleeve with the possibility of interaction with the upper inner rotating arm collar body in the upper position of the sleeve for distribution of fixations knockdown tube, the locking element is spring-loaded, but the radial and the sleeve is arranged to overlap at an upper position of the radial channel of the housing. 15 ig.2 Fig.Z