RU1792481C - Dampening spindle - Google Patents

Abstract

Usage: drilling wells for oil and gas. SUMMARY OF THE INVENTION: The spindle-shock absorber comprises a housing, a hollow shaft, and supporting shock absorbers of longitudinal vibrations. The cavity between the housing and the shaft is filled with oil and sealed with seals. Pistons and a torsional vibration damper are placed inside the oil-filled cavity. The torsional vibration damper is made in the form of a sleeve with slots and gaskets made of elastic material. Holes are made in the shaft, communicating the cavity between the pistons with the shaft cavity. 3 ill. THX

Description

The invention relates to drilling equipment, and in particular to sectional Tours, and can be used for drilling oil and gas wells.

The PU-195 spindle is known, it contains a fixed housing, a rotating EEL, an axial sliding support, which is a rubber-metal bearing, while the rubber-metal thermoplastic acts as an end reinforcement, and the rubber plates of the bearings serve as shock absorbers , therefore, this spindle can be considered amortized.

A disadvantage of the known spindle is the failure of the rubber plates of the bearings, which play the role of shock absorbers.

which leads to failure of the spindle and the deterioration of the turbodrill. Motor resource spindle low.

A ShFD 195 spindle is known, comprising a fixed housing, a rotating shaft, a ball bearing, and the ball joint seal is made in the form of rubber-metal bumpers, which act as a hydraulic damper damping the longitudinal vibrations of the turbo-drill shaft, therefore this spindle can be considered shock-absorbed.

A disadvantage of the known spindle is the wear of the ball bearing due to which the bearing play increases to 8 - 9 mm, which leads to failure of the spindle.

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A spindle-shock absorber is known, comprising a stationary body, a rotating shaft, a rubber-metal radial bearing, a multi-stage ball bearing, each step of the ball bearing consisting of a stationary holder, which is a disk that is separated by spacer bushes, balls are placed on both sides of these bushings, except Moreover, the movable clip moves axially and rests on the compensator-shock absorber, while between the adjacent compensator-shock absorbers there is a disk limiter, which serves to increase Yeni their longitudinal stiffness and limited axial strain. ; : ...;. . . -.

A disadvantage of the known shock absorber spindle is the lack of a sealed oil protection of a multi-stage ball joint, which entails its wear, and as a consequence of the latter, the play increases. This leads to failure of the shock absorber spindle. :

The purpose of the invention is to increase the motor resource spindle-shock absorber;

The shock absorber spindle comprising a stationary housing, a rotating hollow shaft, bearings, elastic elements acting as shock absorbers of longitudinal vibrations is additionally equipped with a sealed oil-filled crankcase with pistons and a torsional vibration damper located in a sealed housing between the shaft and the housing, while the crankcase is made in the form of a cavity formed by a spindle-damping-spindle shaft, a housing and sealing elements, and a torsional vibration damper is made in the form of a sleeve with splines and Adhesives are made of elastic elastic material, and holes are made in the shaft of the shock absorber spindle communicating the cavity between the pistons with the shaft cavity.

In FIG. 1 shows a spindle shock absorber; : in FIG. 2 is a section AA in FIG. 1; in FIG. 3 is a section BB in FIG. 1.

The shock absorber spindle consists of a fixed housing 1, a rotating hollow shaft 2 and a rubber-metal radial support 3. The fixed housing 1 and the shaft 2 form a sealed oil-filled housing 4 made in the form of a cavity protected against penetration of drilling fluid by sealing elements 5 and 6. On the shaft 2, holes B are made that connect the cavity G of the shaft 2 with the cavity D located between the pistons 7 of the crankcase 4. In the sealed oil-filled crankcase 4 there are a spherical bearing 8, elastic elements 9 and 10, made s role longitudinal oscillation damper and the torsional vibration damper 11, constructed as a

bushings with slots and gaskets 12 of elastic elastic material. The spindle shock absorber operates as follows.

Case 1 through the upper sub 13

0 are attached to the turbodrill body, wherein shaft 2 is connected through a sleeve to the turbodrill shaft. A chisel is attached to the bottom of the shock absorber spindle through an adapter 14.

During the operation of the downhole tool assembly, the spindle-shock absorber perceives longitudinal vibrations from uneven operation of the bit cutters and from uneven axial load of the column. In addition, the shock absorbing spindle absorbs torsional vibrations from uneven supply of drilling fluid to the blades of the turbodrill turbine. All this leads to severe operating conditions of the rolling bearings of the support 8. Elastic elements 9

5 and 10, acting as shock absorbers of longitudinal vibrations, gaskets 12 made of elastic elastic material of a torsional vibration damper 11 in a support 8 perceive longitudinal and torsional

0 vibrations, shock loads and, thus, compensate for the inaccuracy of the manufacture of the support parts ..

During the operation of the drill shock absorber spindle, fluid from the turbine section of the turbo5 drill through the rubber-metal radial support 3 and through the hole E enters the cavity G of the shaft 2 and then to the bit. The passage in the cavity G part of the drilling fluid, through the hole In, enters

0 cavity D of the sealed oil-filled crankcase 4, where the oil is pre-filled through the holes with plugs 15. From the cavity D of the drilling fluid, the passage through channel G affects

5 pistons 7 and through them to the oil located in the cavities 3, which, when the sealing elements 5 and 6 are worn, maintains in the crankcase 4 the optimal environment for the rolling bearings of the support 8, elastic elements 9 and 10 to act as longitudinal shock absorbers oscillations, and gaskets 12 made of elastic elastic material of a torsional vibration damper 11.

In the lower part of the crankcase 4, part of the drilling fluid 5 from the cavity Г of the shaft 2 through the hole В enters the cavity I. The drilling fluid in the cavity And unloads the lower sealing elements 5 and b from the oil pressure inside the crankcase 4. The labyrinth seal 16 and the mechanical seal 17 prevent leakage of drilling fluid in the cavity I.

Claims (1)

: The claims The shock absorber spindle, comprising a fixed housing, a rotating hollow shaft, bearings, elastic elements, acting as a shock absorber of the longitudinal flanges, which consists in the fact that, in order to increase the spindle’s service life, it is sealed with a sealed oil filling by crankcase with pistons and shock absorption 0 a torsional vibration torch located in a sealed housing between the shaft and the housing, while the crankcase is made in the form of a cavity formed by the spindle-shock absorber shaft, the housing and sealing elements, and the torsional vibration damper is made in the form of a sleeve with slots and gaskets made of elastic material moreover, holes are made in the shaft of the shock absorber spindle communicating the cavity between the pistons with the shaft cavity. d s 5 6 -1 2. 7 9 sti AND Ji 6 FIG. 4 Aa FIG. 2. Bb FIG. 3)