CN201016281Y

CN201016281Y - Breaking-proof polish rod clip for pumping unit rope hanger

Info

Publication number: CN201016281Y
Application number: CNU2007200114347U
Authority: CN
Inventors: 刘春和
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-30
Filing date: 2007-03-30
Publication date: 2008-02-06
Anticipated expiration: 2017-03-30

Abstract

The utility model relates to a clip for the polished rod of the pumping unit, particularly a clip for the anti-breaking polished rod used for the polished rod eye of the pumping unit. Two pieces of convex-shaped clip board with a semicircle hole in middle part are connected and fixed together by bolts, and a slip dog is fixed at the central hole location by a small screw. The slip dog is made of combination of two semicylinders with steps at two ends and a thread slip insert positioned in the central semicircle hole, the angle between the spiral line of the thread slip insert and the horizontal line is 3.6 DEG, and at least more than two vertical slots are cut on the slip insert. Because the damage line caused by clamping the device to the polished rod is a straight line, the device makes the force bearing area to reduce and the tensile strength to reduce, thereby lengthening the service life of the clip for the polished rod and preventing from the mine accident due to the fracture of the clip for the polished rod.

Description

A kind of anti-breaking polished rod clamp that is used for the oil pumper polished rod eye

Technical field:

The utility model relates to the oil-extractor polish-rod clamp, especially a kind of anti-breaking polished rod clamp that is used for the oil pumper polished rod eye.

Background technology:

In the oil field, generally use oil pumper to pump, the pumping unit horsehead upper end hangs the rope plait, and the lower end hangs polished rod eye, is being located in the polished rod clamp on the polished rod eye, the tight polished rod of polish rod clamp subcard, and the polished rod lower end is connected with deep well pump; Like this, along with the reciprocating motion of pumping unit horsehead, come transferring power by parts such as rope plait, polished rod eye, polished rod clamp and polished rods, thereby driving deep well pump moves back and forth, and crude oil is pumped into ground.

Because at viscous crude, high-solidifiability oil field, the load of oil pumper pumping crude oil is bigger, the load of oil pumper maximum reaches the 6-12 ton, under high like this load, oil pumper moves back and forth for a long time in addition, very easily cause the fatigue fracture of polished rod, and common polished rod clamp is to cause this polished rod major cause of failure.

Common polished rod clamp sees that to the damage of polished rod Figure of description 5,6 is when common polished rod clamp tightens polished rod, because the teeth of card block teeth top are parallel to each other, so the polished rod clamp also is parallel to the lesion wire of polished rod, from longitudinal profile, the cross section of lesion wire is because injury has caused the certain area damage of polished rod, and the actual bearer area of polished rod reduces.Generally, the card tooth of polished rod clamp can snap in 1mm in the polished rod body, i.e. the polished rod of a diameter 25mm in fact only is equivalent to the polished rod of 23mm, its space wastage 16%, and the axial tensile strength of injury region has increased by 19%.Because polished rod ceaselessly bears fluctuating load, this damage is subjected to the influence of fluctuating load, the polished rod damage is along with the prolongation of time, the trend that continues to increase the weight of is arranged, and the axial tensile strength of injury region continues to increase, when axial tensile strength reaches capacity, in case polished rod has disconnected, just can cause oil well stopping production accident, also will carry out fishing, can influence oil well output like this and increase the oil well production cost.

The utility model content:

The utility model purpose is to overcome above-mentioned shortcoming, and a kind of anti-breaking polished rod clamp that is used for the oil pumper polished rod eye that provides can increase the service life, and prevents that polished rod from disconnecting from Ka Yachisunshangchu.

The task of Ti Chuing for achieving the above object, the utility model adopts following technical scheme: it is to have the convex shape clamp of semicircle eyelet to after tying by two centres, be fixed together by bolt, the card block teeth are being fixed with Screw in eyelet position therebetween.

Described card block teeth have step by two two ends, and the semi-cylindrical body that the center semicircle orifice is threaded the card dental structure combines, and the helix of its screw thread card tooth and horizon angle are 3.6 degree, are carved with the vertical slot that comprises at least more than two roads on the card block teeth.

The utility model compared with prior art has distinguishing feature:

Owing to the utlity model has helicitic texture, and on the helicitic texture surface of clamp body, be carved with several vertical slot with certain width (Fig. 2), cause whole threaded line to present interruption state (Fig. 3), like this when the tight polished rod of anti-breaking polish rod clamp subcard, anti-breaking polished rod clamp only is the oblique line of segment (Fig. 2) to the lesion wire that polished rod causes, from longitudinal profile, the damaged area of polished rod is a point (Fig. 4), and polished rod effectively utilizes area not have substantially to reduce, do not exist polished rod axial location tensile strength to increase drawback, simultaneously, because the lesion wire (chucking line) that the utility model causes polished rod is interrupted, when polished rod bore high varying load, damage can not strengthen, thereby has prevented that polished rod from disconnecting from Ka Yachisunshangchu.

Description of drawings:

Fig. 1 is the utility model structural representation diagrammatic sketch of bowing.

Fig. 2 is the utility model structure A-A direction schematic diagram.

Fig. 3 is that the utility model is to the polished rod damage plan.

Fig. 4 is the A-A generalized section of Fig. 3.

Fig. 5 is that common polished rod clamp causes damage plan to polished rod.

Fig. 6 is Fig. 5 A-A generalized section.

Among the figure, 1, the card block teeth, 2, clamp, 3, bolt, 4, Screw, 5, vertical slot, 7, polished rod clamp lesion wire that polished rod is caused, 8, damage back residual area, 9, polished rod clamp damaged area that polished rod is caused, 10, polished rod forms.

The specific embodiment:

Among Fig. 1, clamp 2 is two convex shape clamps, two ends have the screwed hole centre position to have the semicircle eyelet, be drilled with the minor thread hole on the hole wall, the use ordinary steel is made, the card block teeth are that " worker " font is cylindric, two ends have step, the card block teeth are helicitic texture, its helix and horizontal sextant angle are 3.6 degree angles, are carved with the vertical slot that comprises at least more than two roads at card on the block teeth 1, and these card block teeth 1 are placed between the boss in the center hole of being made up of two clamps 2 and are close on the circular hole wall of clamp 2, in the time of fixedly, penetrate with bolt 3 in the screwed hole at clamp 2 two ends, by nut locking, in the middle of clamp 2, penetrate in the hole wall at last then with Screw 4, use bolton again, these scale block teeth just are fixed in the clamp 2.

During use, with polished rod clamp chucking polished rod, the polished rod lower end is connected with deep well pump, like this along with pumping unit horsehead moves back and forth, by polished rod eye polished rod clamp, the polished rod transferring power, thus make deep well pump carry out working in reciprocating mode, crude oil is pumped into ground, in this case because the card block teeth of anti-breaking polished rod clamp have helicitic texture, and be carved with several vertical vertical slot at screw position, so polished rod is when stressed, the damage that anti-breaking polished rod clamp causes polished rod is a point, the tensile strength that can not reduce axial polished rod is particularly when polished rod bears high varying load, damage can not strengthen, thereby prevents that polished rod from disconnecting from injury of teeth, has prolonged polished rod application life.

Claims

1. anti-breaking polished rod clamp that is used for the oil pumper polished rod eye, the convex shape clamp (2) that the semicircle eyelet is singly arranged by two centres is to after tying, be fixed together by bolt (3), eyelet position therebetween, fixing card block teeth (1) with Screw, it is characterized in that: described card block teeth (1) are that two two ends have step, the semi-cylindrical body that the center semicircle orifice is threaded the card dental structure combines, the helix of its screw thread card tooth and horizon angle are 3.6 degree, are carved with the vertical slot (5) that comprises at least more than two roads on the body surface of card block teeth (1).