CN2375759Y

CN2375759Y - Safety anti-releasing elevator pin

Info

Publication number: CN2375759Y
Application number: CN 98249193
Authority: CN
Inventors: 靳占忠; 何卫东; 刘长青; 侯加民
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-11
Filing date: 1998-12-11
Publication date: 2000-04-26
Anticipated expiration: 2008-12-11

Abstract

The utility model relates to a safety anti-releasing elevator pin which relates to a safety installation which is used for guaranteeing that an elevator is not separated from a suspension ring in well drilling and repairing work. The utility model is composed of a pin body and a safety anti-releasing device, and the poor practicality and security of other pins can be overcome. The utility model has the advantages of safety, simple manufacturing technique, low cost, and easy use and operation, which is suitable for poor operation environment in field.

Description

Safe anticreep elevator pin

The elevator pin is to be used for oil drilling, workover treatment to ensure that elevator does not break away from the safety device of suspension ring.

Existing pin reliability is not high, when workman's misoperation and when carrying suddenly, carrying firmly or putting soon, the elevator pin often takes place knock and fly phenomenon, causes suspension ring to eject thus, causes oil pipe, drilling rod to fall the well accident, and operator's personal safety is caused huge threat.

Existing pin is a straight iron rod, directly penetrates in the elevator earhole, and without any locking device, safety is very poor.Magnetic force went down during improved magnetic force pin used, and the safety meeting decreases, simultaneously, workman's period of the day from 11 p.m. to 1 a.m effort of pulling pin, workload is big, is difficult to promote.Remaining several adverse circumstances that also can't adapt to the field, as be subjected to earth, greasy dirt, wax to invade and promptly can not use.

The purpose of this utility model provides a kind of safe anticreep elevator pin, and it is in use not fragile, can ensure safety in production.

Technical solution of the present utility model is to realize like this, a kind of safe anticreep elevator pin, be bound up by axle sleeve 1 and pin main body 7 and constitute, its special character is that there is a plane b at (1) axle 2 centers, and axle 2 is contained in the axle sleeve 1, axle 2 is bound up with lock ring 6, have back-up ring 3 on the lock ring, spring 5 and pin 4 are contained in the centre bore a of pin main body 7 successively and locking bar 8 is formed locking device together.(2) there is locking bar 8 at lock ring 6 middle parts, and lock ring 6 is rotatable, fastens the elevator ear.(3) pin main body 7 heads have centre bore a, and there is groove c at the middle part, and the locking bar head can enter in the groove fully.

The utility model has the advantages that (1) has the dual fail-safe structure, improved the security performance of elevator pin.Laborsaving when (2) plugging and unplugging pin, easy to operate.(3) be not afraid of to fall and bump, be not afraid of shake, long service life is suitable for using in abominable wild environment.

Accompanying drawing 1 is a structural representation of the present utility model.

The utility model is to implement like this:

With pack in the hole a of pin main center spring 5 and pin 4, then pin main body 7 and axle sleeve 1 are welded together, axle 2 passes axle sleeve 1 and welds together with back-up ring 3 and lock ring 6, and lock ring can rotate together with axle.On the axle with pin main center hole a opposite position be milled with a plane b, lock ring 6 central authorities have one with the angled locking bar 8 in lock ring plane, a half slot c is arranged on the pin main body, locking bar 8 heads can enter in the sulculus c.

When lock ring 6 forwards to when just in time fastening the elevator ear location around axle 2, pins 4 in the pin main body 7 since the elastic force of spring 5 and on move, tightly withstand axle 2, owing on the axle plane b is arranged, because wobbler action produces a moment axle 2 is rotated, drive and axle lock ring 6 welded together are pressed on the pin main body 7, realize self-locking, make lock ring 6 fasten the elevator ear, play the anticreep effect.

In actual production, because following being inclined upwardly slightly of part suspension ring ear, in that taking place, big vibration (breaking as oil pipe) causes when scurrying on the pin, lock ring 6 might take place with the lower plane of elevator ear to slide and deviate from, and reduces the safety of pin.For this reason, sulculus c is set on pin main body 7, and there is a locking bar 8 in lock ring 6 central authorities, press to the power of pin main body 7 when utilizing lock ring 6 self-lockings, locking bar 8 is pressed in the sulculus c, when pin makes progress play,, so both can limit pin and scurry on continuing because locking bar 8 prior to lock ring 6 contact elevator ears, and inserts in the elevator ear hole stuckly, can limit pin lock ring 6 again outwards skids off, to the pin dual fail-safe, thereby thoroughly avoid pin to deviate from, reached the effect of safe anticreep.

This pin axle 2 and axle sleeve 1 cooperates closely, has the shaft shoulder and back-up ring 3 to cover again, and earth, greasy dirt and wax are difficult for entering pin inside, guaranteed spring 5 and pin 4 not reason stop up and lost efficacy.Field extreme environment to probing, well workover and other use elevator can adapt to fully, and this pin configuration is firm simultaneously, be not afraid of vibrations, fall and bump, thereby reliability is high.

Claims

A kind ofly being used to ensure that elevator does not break away from the safe anticreep elevator pin of suspension ring, is by axle sleeve (1) and pin main body (7) formation that is bound up, and it is characterized in that:

There is a plane b at a, axle (2) center, axle (2) is contained in the axle sleeve (1), and axle (2) and lock ring (6) are bound up, and have back-up ring (3) on the lock ring (6), spring (5), pin (4) are contained in the centre bore of pin main body (7) successively, and locking bar (8) is formed locking device together;

There is locking bar (8) at b, lock ring (6) middle part, and lock ring is rotatable, fastens the elevator ear;

C, pin main body (7) head have centre bore a, and there is groove c at the middle part, and the locking bar head can enter in the groove fully.