CN2250416Y - Anti-slip hollow sucker rod - Google Patents

Abstract

The utility model relates to an anti-slip type hollow oil pumping rod belonging to a power transmission device in an oil pumping rod type pump well of an oil field. The anti-slip type hollow oil pumping rod is adopted in order to solve the problem of the serious rod break and the buckle slip of an oil pumping rod caused by the generation of buckle disassembly torque and the continuous large torque torsion of the oil pumping rod in the process that a screw pump is driven on the ground to be placed into a well and is stopped. The anti-slip type hollow oil pumping rod can be divided into an upper part joint, a rod body and a lower part joint, wherein, a tooth body of the lower part joint of one segment of oil pumping rod and a groove body of the upper part joint of the other segment of oil pumping rod are in embedding connection. The anti-slip type hollow oil pumping rod can bear large torque torsion and buckle disassembly torque, and is especially suitable for a screw pump well.

Description

The separation preventing hollow rod

The utility model belongs to the power transmission in the oil field oil pumping rod-type pump sump.

Introduced JI type hollow rod structure in 1993 in by " People's Republic of China's oil and gas industry standard " of national energy portion issue the 1st page; as shown in Figure 4; the two ends of this sucker rod are external screw thread and connect; when using at the scene; this sucker rod is by screw thread transferring power moment of torsion and axial load; utilize this sucker rod connected mode; especially ground driving screw pump go into the well and stopping process in; rod string does not overcome the shackle moment of torsion; and cause serious dropout phenomenon; sucker rod bear continuous high pulling torque reverse with tensile load in; cause disconnected bar easilier; the slide fastener phenomenon, this has just shortened its application life in screw bolt well greatly.

The purpose of this utility model is to overcome the weak point of above-mentioned prior art, and a kind of separation preventing hollow rod device that is applicable to sucker rod pump that provides.

The purpose of this utility model can reach by following measure:

The separation preventing hollow rod, it can be divided into three parts: top sub, the body of rod and bottom joint.

Wherein the tooth body of a joint sucker rod bottom joint is embedded the connection with the cell body of another joint sucker rod top sub.This connected mode be that tooth body and the cell body by mutual embedding comes the transferring power moment of torsion, and the screw thread between the body of rod is by continuous box cupling, only play interconnect function, transferring power moment of torsion not, the body of rod that couples together can just change counter-rotating synchronously, has anticreep, anti-skidding, anti-breaking function.

The purpose of this utility model can also reach by following measure:

The seal head of the top sub of one joint sucker rod is sealed and matched with the sealing surface of another joint sucker rod bottom joint and is connected.Wherein the seal head of top sub seals with twice O RunddichtringO.

The utility model compared with prior art has following advantage:

1. have anticreep, anti-skidding, anti-breaking function, be particularly useful for screw bolt well;

2. can bear continuous large torque reverses and the shackle torque;

3. also be applicable in the non-tubing oil extraction well.

The drawing of accompanying drawing is described as follows:

Fig. 1 is a separation preventing hollow rod structure diagram.

Fig. 2 is the cell body sectional drawing of top sub.

Fig. 3 is the tooth body sectional drawing of bottom joint.

Fig. 4 is a JI type hollow rod structure diagram.

Be described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the separation preventing hollow rod, and it can be divided into three parts: top sub, the body of rod and bottom joint.

Top sub is made up of seal head 1, cell body 2, last male thread 3, spron 4, body of rod top transition portion 5.The body of rod is 10.The bottom joint is by tooth body 9, sealing surface 8, following male thread 7, and body of rod bottom transition portion 6 is formed.

Wherein 4 pairs of the sprons box cupling that is used to connect sucker rod plays the thrust effect.Body of rod top transition portion 5 and body of rod bottom transition portion 6 can be used spanner and pipe wrench in the box cupling connection procedure.The body of rod 10 is a hollow rod body.

Fig. 2 is the sectional drawing of top sub cell body, is garden shape in the middle of the shape of cross section of cell body, and both sides are the garden arc of projection.

Fig. 3 is the sectional drawing of bottom joint tooth body, and the shape of cross section of tooth body is the two lobe garden arcs that cooperate with cell body.

When constructing at the scene, be that several same separation preventing hollow rod is coupled together use with box cupling, at first on the following male thread 7 that connects first sucker rod bottom joint of box cupling screw-in, being threaded to tooth body 9 exposes till the box cupling fully, then the tooth body 9 of first sucker rod is inserted in the cell body 2 of second sucker rod fully, make the seal head 1 of first sucker rod be threaded to sealing surface 8 places of second sucker rod simultaneously, the two is by the sealing of O RunddichtringO, again box cupling is tightened onto on the spron 4 of second sucker rod, when box cupling during by the last male thread 3 of second sucker rod of following male thread 7 precessions of first sucker rod, can regulate the position of box cupling with spanner or pipe wrench, make its correct placement.Such two sucker rods just connect to get up, and the rest may be inferred couples together for remaining sucker rod, at last the sucker rod that connects are lowered into and carry out work in the well and get final product.

The utility model is not limited to above-mentioned a kind of embodiment, and wherein the cross section interior shape of the cross section outer shape of cell body 2 and tooth body 9 can also be regular polygon or non-regular polygon, and certainly, polygonal design should be able to make both embed cooperation continuously.

Claims (2)

1, a kind of separation preventing hollow rod, it can be divided into top sub, the body of rod, bottom joint three parts, the tooth body (9) that it is characterized in that a joint sucker rod bottom joint is embedded the connection with the cell body (2) of another joint sucker rod top sub, and the seal head of top sub (1) is sealed and matched with the sealing surface (8) of bottom joint by twice O RunddichtringO and is connected.

2, separation preventing hollow rod according to claim 1, its feature is that also the shape of cross section of top sub cell body (2) is middle for circular, both sides are the circular arc body of projection, tooth body (9) shape of cross section of bottom joint is the two lobe circular arc bodies that cooperate with cell body (2), and the shape of cross section of the shape of cross section of cell body (2) and tooth body (9) can also be regular polygon or non-regular polygon.

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