CN2149514Y - Transverse shock absorber - Google Patents

Abstract

The utility model relates to a protect instrument such as pressure gauge and clock among oil gas well test operation. It is mainly composed of an upper joint and a lower joint which are connected together through a mandrel, and an elastic body is arranged on the mandrel through a sliding sleeve. The elastic body is composed of a spiral spring, a friction block and an outer cylinder, two ends of the spiral spring are respectively installed in a groove of the sliding sleeve and a groove of the friction block, the lower end of the friction block is installed in the lower end of the outer cylinder, the upper end of the friction block is installed in a movable check ring, and the movable check ring is connected with the upper end of the outer cylinder and the sliding sleeve together through screws. The device is used with a longitudinal shock absorber, and damage to the instrument due to the explosion of the perforating charge can be prevented.

Description

Vibration-damper

The utility model relates to the instrument that a kind of oil gas well surveying studies instrument such as protection pressure meter and clock thereof in the industry.

In the oil field prospecting exploitation, when the oil gas well is carried out the gun perforation process technology, instrument, parts such as perforating gun, pressure meter and clock thereof need be connected in the test string, be lowered in the pit shaft together.When the perforating ball explosion time, can produce a huge impact power, make test string produce violent vibrations, (comprising transverse vibration and vertically vibrations), tend to damage instruments such as pressure meter and clock thereof, influence normally carrying out of test job, cause test result inaccurate, influence is got and is got accurate test data entirely and to the evaluation analysis of oil gas well.Though the working site has been used vertical vibration damper at present, it only can eliminate vertical vibrations of tubing string, and transverse vibration still exists, and still can produce bigger influence to instruments such as pressure meter and clocks thereof.

The purpose of this utility model is in order to design a kind of transverse damper, to eliminate the transverse vibration that the perforating ball explosion time produces.It is used with vertical vibration damper during work, can weaken or eliminate the powerful vibrations of perforating ball explosion time to tubing string and instrument generation effectively, thus instruments such as protection pressure meter and clock thereof.

The technical solution of the utility model is to realize like this; a kind of oil gas well surveying studies the transverse damper of instrument such as protection pressure meter and clock thereof in the industry; reaching upward by the upper connection with screw thread screw thread, lower contact, the middle elastomer of lower contact constitutes; its special way is that lower contact is bound up by axle; elastomer is installed on the axle by sliding sleeve, has the free gap in the axial direction between sliding sleeve and the last lower contact.

In technique scheme, elastomer is made of helical spring, brake pad and urceolus, has vertical dead slot on the urceolus, the helical spring two ends are installed in respectively in the groove that reaches brake pad in the sliding sleeve groove, pack in the lower end of urceolus in the lower end of brake pad, pack in the activity back-up ring in the upper end, by screw with on movable back-up ring and the urceolus, sliding sleeve is bound up.

In above-mentioned technical solution, helical spring is formed a helical spring group jointly by long helix spring and short helical spring.

The utility model has the advantages that brake pad and internal surface of sleeve pipe frictional force are less in the process of going into the well, easily down go, and when producing vibrations in the down-hole, the ability of anti-transverse vibration is stronger, damping effect is obvious.Owing to have axial play between sliding sleeve and the last lower contact, avoided the influence of vertical vibrations to this transverse damper simultaneously, it and vertical electromagnetic shaker are used jointly, can prevent from effectively to damage owing to powerful vibrations make downhole instrument.

Fig. 1 is the utility model general assembly structural representation.

Fig. 2 is the sectional drawing at A--A place.

Embodiment 1: have the upper connection and the lower contact of screw thread, pass through scyewed joint with axle, evenly distribute around axle 4---12 semielliptic spring or cluster spring are installed, an end of spring is fixed on the sliding sleeve, and the other end can slide in the groove of sliding sleeve.Each cluster spring can be formed by stacking by two or three semielliptic springs different in size.

Embodiment 2, accompanying drawings: long helix spring 7 is installed in the groove uniform around the sliding sleeve 3 successively, vertically has four row's grooves in this example, eight of every rows are equipped with short helical spring 8 on the cylinder 9 in the groove.Have four vertical dead slots on the urceolus 10, urceolus 10 is enclosed within outside the sliding sleeve 3, make helical spring pass corresponding vertically dead slot on the urceolus 10, four brake pads 6 are put in 4 vertical dead slots of urceolus 10, the lower end of brake pad 6 is inserted in the ring of urceolus 10 lower ends, make length, short helical spring 7,8 the other end is put into respectively in the groove of each corresponding brake pad, movable back-up ring 5 is enclosed within the upper end of urceolus 10, entangle the upper end of four brake pads 6 simultaneously, with screw 14 with movable back-up ring 5, urceolus 10, sliding sleeve 3 is fixed together, last back-up ring 4 and following back-up ring 11 are installed in the two ends up and down of sliding sleeve 3, the elastomer of formation present embodiment respectively by screw thread.The elastomeric sliding sleeve 3 that assembling is finished is enclosed within on the axle 12, and sliding sleeve 3 can be free to slide on axle 12, and axle 12 is a hollow tubular.Last lower contact 1,13 is connected on the two ends of axle 12 by screw thread, and the upper end of upper connection 1 has the oil pipe box thread, and the lower end of lower contact 13 has the oil pipe male thread.The joint axial centre has through hole up and down.Have the gap between elastomer two ends and the last lower contact, this gap is greater than vertical maximum shock momentum.

Claims (3)

1, a kind of oil gas well surveying studies the lateral damper of instrument such as protection pressure meter and clock thereof in the industry; reaching the middle elastomer of upward lower contact by the upper connection with screw thread (1), lower contact (3) constitutes; it is characterized in that lower contact is bound up by axle (12); elastomer is installed on the axle (12) by sliding sleeve (3), has the free gap in the axial direction between sliding sleeve (3) and the last lower contact.

2, transverse damper according to claim 1, it is characterized in that elastomer is made of helical spring (7,8), brake pad (6) and urceolus (10), urceolus has vertical dead slot on (10), the helical spring two ends are installed in respectively and reach in brake pad (6) groove in sliding sleeve (3) groove, pack in the lower end of urceolus (10) in brake pad (6) lower end, packing in the activity back-up ring (5) in the upper end, by screw (14) movable back-up ring (5) and urceolus (10) upper end, sliding sleeve (3) is bound up.

3, transverse damper according to claim 2 is characterized in that helical spring forms a helical spring group jointly by long helix spring (7) and short helical spring (8).

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