CN2937449Y

CN2937449Y - Beam-pumping unit polish rod elevator

Info

Publication number: CN2937449Y
Application number: CN 200520093392
Authority: CN
Inventors: 崔广山; 崔洪志
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-09
Filing date: 2005-11-09
Publication date: 2007-08-22
Anticipated expiration: 2015-11-09

Abstract

A polished rod clamp for well pumping unit essentially eliminates the time and effort waste of prior polished rod clamp in oil recovery as well as the phenomenon that the clamping teeth has no essence of compensation and are prone to be slipped, and, due to the ingenious design, solves the problem the oil sucker rod dropping caused by wire line hanger torsion, characterized in that clamping teeth (1, 2) match with clamping seat (3, 4); the unique inclined cylinder matching surface structure may makes the clamping teeth (1, 2) leap longitudinally in the clamping seats (3, 4); a locking steel ring (6) connects via pin holes with a locking handle (8), substituting traditional screw-nut lockage; a friction-eliminating base seat (3) is mounted at bottoms of the clamping seats (3, 4). The utility model has the advantages of convenient, safe and reliable operation as well as functions of clamp slipping and oil sucker rod dropping, the utility model greatly lightens the labor intensity and reduces the occurrence of oil sucker rod break-off accidents.

Description

A kind of oil-extractor polish-rod clamp

Technical field:

The utility model relates to the plant equipment in the petroleum production engineering field, oil field, belongs to the on-the-spot oil-extractor polish-rod clamp that uses of a kind of well recovery.

Background technology:

In sucker rod pumping equipment oil recovery production scene, oil field, need to use polished rod clamp (side's of being commonly called as clamp) that polished rod is fixed on the oil pumper polished rod eye, make down-hole rod string loading on oil pumper.Present used polish rod clamp subcard tooth is a cylindrical surface structure, and deck is bolt locking, and this kind clamp has three shortcomings: the one, and inconvenient operation, labour intensity is big, and lock bolt need clamp nut screwing clamping with 18 cun spanners or 24 writing brushes, wastes time and energy; The 2nd, because the pretightning force of the wearing and tearing of card sound of baby talk line or lock bolt is not enough, the phenomenon that usually has clamp strip, polished rod to take off causes and stops well and influence output; The 3rd, because part well polished rod eye is beaten to turn round to sucker rod and applied moment of torsion and often caused bar to take off, present employed clamp can't address this problem.

The utility model content:

The purpose of this utility model provide a kind of easy to operate, prevent that sucker rod from taking off and blocking the polished rod clamp of tooth strip.Make the oil recovery worker in the process of bumping operations such as pump, accent dead space, save the operating time, reduce labour intensity; In the oil pumper running, avoid that polished rod takes off, the clamp strip, reduce the oil well ground pollution and stop the output that well causes and descend.

The technical scheme that the utility model adopted is: a kind of polished rod is fixed on the employed polished rod clamp of machine-pumped oil well on the polished rod eye, its two card tooth profiles are the cylindrical part of tiltedly cuing open, identical with the deck fitting face shape that is contacted, card tooth inside is the notched teeth line, vertically arranges along the face of cylinder; Set lever is connected on a slice deck with pin, and the locking steel loop also connects with pin with set lever, and the set lever axis angle is greater than 90 degree; The friction pedestal that disappears is installed on the deck bottom centre position, should eliminate the frictional force between clamp and the polished rod eye between clamp and polished rod eye when installing and using.

The beneficial effects of the utility model are: because Ka Ya and deck fitting face are the tilting faces of cylinder, allow the longitudinal sliding motion in deck of card tooth, two card teeth can clamp diametrically along with length travel, the clamping force of this device will increase along with the increase of clamping load like this, thereby play the anticreep effect, increased safety factor; The design of set lever and steel loop has replaced traditional bolt and nut locking, and is easy and simple to handle, greatly reduces working strength of workers; The friction pedestal that disappears utilizes thrust ball bearing to eliminate frictional force between clamp and the polished rod eye, has reduced because polished rod eye is beaten and turned round the bar that causes and take off accident.

Description of drawings:

Accompanying drawing 1 is the utility model structure sectional view.

Accompanying drawing 2 is the utility model vertical views.

Among Fig. 11,2-card tooth, the 3-friction pedestal that disappears;

Among Fig. 21,2-card tooth, the 3-friction pedestal that disappears; 4-deck (1), 5-deck (2), 6-locks steel loop, 7-attachment pegs, 8-set lever, 9-attachment pegs.

The utility model is described in further detail below in conjunction with accompanying drawing:

Embodiment 1:

As shown in fig. 1, two cards of this polished rod clamp tooth (1,2) profile is the cylindrical part of tiltedly cuing open, identical with the deck fitting face shape that is contacted (oblique circular cylinder surface), card tooth inside is the notched teeth line, vertically arrange along the face of cylinder, card tooth (1,2) vertically moving on the oblique circular cylinder face in deck (4,5), two card teeth (1,2) footpath area that is surrounded that makes progress is dwindled, clamping force increases, play the anticreep effect, deck (4,5) is connected by pin (9), and locking device (8) can be the bolt locking mode.

Embodiment 2:

Change the locking device among the embodiment 1 (8) into set lever locking easily, as shown in Figure 2, set lever (8) is connected on the deck (5) with pin (7), locking steel loop (6) connects with also pin with set lever (8), set lever (8) is " 7 " font, its axis angle should just can make device reach the self-locking purpose greater than 90 degree.

Embodiment 3:

On the basis of embodiment 2, increase the friction pedestal (3) that disappears, be installed on the deck bottom centre position, should between clamp and polished rod eye, eliminate the frictional force between clamp and the polished rod eye when installing and using.

Card tooth (1,2) should have enough intensity and hardness, requires to use the modified and heat treatment of turning black of 45# steel, and for saving processing cost, deck can use foundry goods.

During actual the use, the friction pedestal (3) that will disappear earlier penetrates from the polished rod top, place on the polished rod eye, then two decks of this clamp (4,5) and card tooth (1,2) are opened, encased polished rod, be seated on the friction pedestal (3) that disappears, pull set lever (8) clockwise, to lock steel loop (6) and be enclosed within the groove of deck (4), the another mistake hour hands are pulled set lever (8) with deck locking, get final product operate as normal.

This clamp is simple to operation, and the safety factor height significantly reduces working strength of workers, and can avoid sucker rod to take off with the accident of polished rod strip taking place.

Claims

1, a kind of oil-extractor polish-rod clamp, comprise card tooth (1,2), friction pedestal (3) disappears, deck (4,5), set lever (8), locking steel loop (6), attachment pegs (7,9), it is characterized in that two decks (4,5) connect by pin (9) is movable, card tooth (1,2) profile is identical with the deck fitting face shape that is contacted, card tooth (1,2) inside is the notched teeth line, vertically arrange along the face of cylinder, set lever (8) is connected on the deck (5) with pin (7), locking steel loop (6) connects with pin with set lever (8), and the friction pedestal (3) that disappears is installed on deck (4,5) bottom centre position.

2, oil-extractor polish-rod clamp according to claim 1 is characterized in that: set lever (8) be shaped as " 7 " font, forms by connecting body and handle two parts, its two pin-and-holes line and handle portion center line angle are spent greater than 90.

3, according to the described oil-extractor polish-rod clamp of claim 1, it is characterized in that: card tooth (1,2), to form by two identical oblique circular cylinder face wedge-like mechanisms, the fitting face between card tooth (1,2) and deck (4,5) also is an oblique circular cylinder face structure.