SU608909A1 - Multistep face shock absorber - Google Patents

Description

it and the outer thrust disk cut the shayooi, and the inner surface of the outer thrust disk and the outer surface of the split shayoi are tapered ..;

i tiK.oe execution provides access for adjusting the height of the split bushings with the equal tension of the other elements in the polycryiic H4aiOM with a self-sticking shock absorber and in the water direction and parts in two stages.

on the nerve of ethane soorat on the trunk all internal spacers, bushings with vysgunom 1-1 thrust discs; install, installiiTb and fasten the other elements. In the second stage, to collect all outer spacers, adjust them} along the established other elements, then fix the section with the shaft and the outer stop disc.

The ria cherge is proven to offer a multi-tuned and self-contained shock absorber, OCI.

The amorgnizer contains a barrel 1, on which internal thrust bearings Dxx Zn inner spacers 6 are mounted. The sleeves with extruded 4 are assembled to the internal dissolver sleeves, the gauge diameter of which should not exceed the outer diameter of the normal discs 2 and elastic elements O, fitted between them . Elastic elements on the bottom of the check and adjustment are secured with a fixed ax. odicM made the collar of the outer expansion sleeves /, adjusting them already in accordance with the installed elastic elements-, the sleeve with the protrusion set the split shayoi and against which the outer expansion sleeves abut. Shayoi hall; they are equipped with external stop discs 9; a curb installs a 1U case connected to a non-diverter il, through which the total tightening of external end-drive disks U is produced; the torque transmission unit 12 consists of an inner coupling half 13 and an outer coupling half 14 with joint axles. end-drilling, in which the steel balls 15 are placed. To protect the internal part of the device from attaching the drill hole particles, a seal ib is installed.

The shock absorber works as follows.

In its working state, the shock absorber is rigidly connected to the lower end of the barrel 1 with a source of vibration - a chisel (not shown in the drawing), and is connected rigidly to the drill string (not shown in the drawing; above). Iodine by longitudinal action horizontally and all the parts rigidly connected with it make a longitudinal-oscillatory movement with a frequency of W-6 (Ji) 1C and amnitudum fluctuations from fractions of a millimeter to several sant and meters when amplifying movement

5-30 tons. The elastic elements, due to their ni; bosti, are compressed in tact with the specified vibration of stm. 1 and thereby contribute to the complete or partial suppression of these vibrations and prevent their further spreading and the side of the sleeves with the protrusion 4, the outer spacer sleeves 7, housing 10 and a drill string rigidly connected thereto. Thus, the trunk system commits

reciprocating relative to the hull system in the axial direction, while simultaneously the torque required for drilling is transmitted from the hull to the trunk by means of a hinge-face assembly 12 of the torque transmission unit. All the details that are above the elastic elements are protected from the longitudinal vibrations generated along the shaft with the bit, and this achieves the solution of the important technological task of vibration protection of the drilling tool I1 to protect the bit against dynamic shock overloads.

In the proposed damper, the height of the outer spacer sleeves is provided with a uniform tension of the elastic elements, which is the main condition for ensuring joint (parallel) operation of the shock absorber. Thanks to the achievement of optimal combinations of working parameters

characteristics increase the mechanical speed of drilling and reduce the risk of breakage of the drilling tool. The availability of adjustment with ensuring uniform tension of elastic elements makes it possible to increase the number of stages in multistage downhole shock absorbers to 7–10 or more, which makes it possible to correspondingly reduce the specific load on each spring and thereby increase their durability.

Claims (2)

Invention Formula Multistage downhole shock absorber containing subs, barrel, body, elastic elements, external and internal thrust disks, external and internal spacers, characterized in that, in order to increase the reliability of operation by ensuring uniform tension of the elastic elements, it is equipped with a sleeve the protrusion and the split shchaib placed between it and the outer thrust disk, and the inner surface of the outer thrust disk and the outer surface of the split shawl are tapered. Information sources taken into account during the examination 1. USSR author's certificate N ° 274028, cl. E 21B 17/06, 1966. 2. Pekhnyu MI, et al. Drilling of oil and gas wells with the use of over-long shock absorbers. Kiev, “Naukova Dumka, 1971, p. 95