CN2367761Y

CN2367761Y - Anti-drop single spinner for sucker rod

Info

Publication number: CN2367761Y
Application number: CN 99203595
Authority: CN
Inventors: 张明
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-02-24
Filing date: 1999-02-24
Publication date: 2000-03-08
Anticipated expiration: 2009-02-24

Abstract

The utility model relates to an anti-drop single spinner of a sucker rod for a rod-pumped well of an oil field, which prevents the back-off phenomenon of the sucker rod and has high intensity. A shaft type lower joint 9 connected with the sucker rod is adopted, the shaft type lower joint 9 is sheathed with a spring 8, and an upper and a lower cylinders (4 and 5) with the same outer diameter, wherein, the lower cylinder 5 and a shaft (the lower joint) are assembled in a sliding way by a key slot 7. The upper cylinder 4 and an upper joint 1 are connected and screwed, the upper end of the lower joint 9 is screwed and connected with a pressure adjusting nut 2 which can push the upper cylinder 4, the cooperation ends of the upper and the lower cylinders (4, 5) respectively form more than two halves of helical joggled ring surfaces 12, and axial shielding surfaces 11 are formed among half ring interfaces, which forms the single spinner. The action of collapse prevention is achieved.

Description

Sucker rod anticreep single spinner

The utility model is used for sucker rod anticreep single spinner in oil field screw pump and the pumping production well, and the upper and lower joint that links to each other with sucker rod is arranged.

The oil field enters oil pumping period, and the well head of being everlasting is installed oil pumper, the sucker rod string is pumped drive the oil pumping of down-hole oil production pump, title pumping production well.Because well is darker, generally more than a km, the sucker rod string of all sucker rod to be threaded is as noodles; Because the well bore situation is not desirable vertical well, the central axis of well is not a vertical line, is added with the variation on the orientation more in addition; There is moment of torsion each other in the upper and lower part of a bite well sucker rod string, and there is the dropout phenomenon in sucker rod.Especially screw pump oil production well; it is fuel-displaced to drive shaft bottom pump rotation by the rotation of ground motor-driven sucker rod string; by above analysis; sucker rod string moment of torsion everywhere is different; after shut down on ground, the sucker rod string restored balance under the elastic reaction of steel, caused (with the last button opposite direction) rotation in the other direction of sucker rod string top; cause pumping rod disengaging, especially the phenomenon of screw bolt well pumping rod disengaging is more serious.At present, adopt double wheel ball bearing anti-dropping device, because of structural limitations, the anti-dropping device axle is thinner, phenomenon of rupture in use often occurs.

The purpose of this utility model is to avoid the weak point that occurs in the above-mentioned prior art, and the sucker rod anticreep single spinner of a kind of intensity height applicable to different wells is provided.

The purpose of this utility model can reach by the following technical programs: adopt the shaft type lower contact, it is the threaded two footpath axles in two ends, is with spring and with the upper and lower tube of external diameter on the particle size axle; Wherein doffing and axle are with key, groove slidable fit, and top cylinder is threaded with top connection; On lower contact axle upper end, be threaded and promote the look nut of top cylinder.Respectively form two halves above luer engages with anchor ring with external diameter on the upper and lower tube counterface above-mentioned, respectively encircle more than the two halves and form axial block face between the interface.

In such scheme, on two counterfaces, respectively form the above luer engages with anchor ring of two halves of left hand direction.Can between nut and top cylinder, bearing be housed.By above this anti-dropping device of forecast scheme configuration.This anti-dropping device is installed in this anti-dropping device on the sucker rod string as being used on the screw bolt well, all is in process of production to rotate by forward (clockwise rotating direction), and this anti-dropping device rotates thereupon.After shut down on ground; promptly have moment of torsion on the bar string, at this moment the bar string press instead (rotating counterclockwise) to rotation, when this moment passes on the anti-dropping device on the anti-dropping device owing to self elastic energy discharges; owing to be the engagement of spiral anchor ring between the upper and lower tube of this anti-dropping device; can produce axial thrust load and make the spring pressurized, doffing is moved down, two break away from engagement; make member formation idle running on the top cylinder; be that reactive torque can not descend to pass, can prevent to thread off, realize this purpose.

The utility model is compared with above-mentioned present technology can have following effect: this anti-dropping device can be considered the joint between the sucker rod, can rotate with sucker rod in operate as normal, because the effect of anti-dropping device upper spring can make the box cupling between the sucker rod increase pretightning force.When ground is shut down or because well bore is out of condition, and moment of torsion can not disappear immediately on the sucker rod string of down-hole, is pressed counterclockwise under sucker rod self elastic reaction and rotate; When opposing torque is delivered on the sucker rod string this anti-dropping device, because between the upper and lower tube is the luer engages with anchor ring, produce axial thrust load, the compression spring moves down doffing, upper and lower tube breaks away from engagement, make top cylinder form idle running, thereby can not form the dropout moment of torsion, promptly eliminated the phenomenon that releases on the sucker rod string with the upper boom string.Because the diameter of axle is thicker in this anti-dropping device, improved the anti-intensity that twists off.

Accompanying drawing 1 is that the utility model partly cuts open fundamental diagram;

Accompanying drawing 2 is that the internal diameter with doffing on Fig. 15 is a benchmark, is expanded view on upper and lower tube (4,5) cooperating face.

To be further described the utility model below in conjunction with accompanying drawing:

, be linked to be on the upper and lower joint (1,9) of string with sucker rod in conjunction with shown in Figure 2 by Fig. 1, wherein the body portion of lower contact 9 is an axis body, and is two footpath axles, and there is the screw thread that links to each other with sucker rod at two ends; On the particle size axle, be with spring 8 and with the upper and lower tube (4,5) of external diameter.Wherein doffing 5 and axle slide doffing 5 with key, groove 7 slidable fit vertically; Top cylinder 4 is threaded with top connection 1, and the look nut 2 that is threaded and can promotes top cylinder 4 on lower contact 9 upper ends turns nut and can make tube 4 descending.Respectively form the above luer engages with anchor ring 12 of two halves with external diameter on upper and lower tube (4,5) counterface, respectively encircling the axial block face 11 of formation between the interface more than the two halves; Can form 4 half or most luer engages with anchor ring 12.

In such scheme, on two (4,5) counterfaces, respectively form the above luer engages with anchor ring of two halves of left hand direction, upper and lower two counterfaces can circumferentially be slided in the counterclockwise direction, stop circumferentially in the clockwise direction and slide, can claim single spinner.Can between nut 2 and top cylinder 4, can adorn bearing 10, and hold-down screw (3,6) upwards is housed in the week of nut 2, doffing 5.Before the installation, cover upper spring 8 and upper and lower tube (4,5) and the nut 2 that is threaded in lower contact 9, top connection 1 is threaded with top cylinder 4 by nut 2.

Claims

1. a sucker rod anticreep single spinner that is used for oil field pumping well has the upper and lower joint (1,9) that is linked to be string with sucker rod, it is characterized in that:

A. adopt shaft type lower contact (9), it is the threaded two footpath axles in two ends, is with spring (8) and with the upper and lower tube (4,5) of external diameter on the particle size axle; Wherein doffing (5) and axle are with keyway (7) slidable fit; Top cylinder (4) is threaded with top connection (1), the look nut (2) that is threaded and can promotes top cylinder (4) on lower contact (9) upper end;

B. respectively forming the above luer engages with anchor rings of two halves (12) on upper and lower tube (4,5) counterface, between each semi-ring interface, form axial block face (11) with external diameter.

2. according to the described anticreep single spinner of claim, it is characterized in that: the above luer engages with anchor rings of two halves (11) that on two (4,5) counterfaces, respectively form left hand direction.

3. anticreep single spinner according to claim 1 is characterized in that: can adorn bearing (10) between nut (2) and top cylinder (4).