CN2067772U

CN2067772U - Combined head sheave type long stroke oil pumping unit

Info

Publication number: CN2067772U
Application number: CN 90203903
Authority: CN
Inventors: 岳广胜; 黄兆芝; 孟宪臣; 胡博仲; 王当芳; 高国寅; 崔旭明; 关维; 谭云; 任福山
Original assignee: OIL EXTRACTING FACTORY NO 3 DAQING PETROLEUM ADMINISTRATION; Daqing Petroleum Institute
Current assignee: OIL EXTRACTING FACTORY NO 3 DAQING PETROLEUM ADMINISTRATION; Daqing Petroleum Institute
Priority date: 1990-03-30
Filing date: 1990-03-30
Publication date: 1990-12-19

Abstract

The utility model discloses a combined head sheave type long stroke oil pumping unit. The longest stroke can reach 8 meters. The utility model primarily removes the walking beam of the original pumping unit, and the walking beam is replaced by the combined head sheaves 9, 10 rotating coaxially and synchronically. The small head sheave 10 is connected with a cross beam 7, a connecting rod 5 and a crank 4 via a steel cable 8, and the large head sheave 9 is connected with a well mouth suspensorium 15 by a steel cable 14. The length of the stroke is decided by the diameter ratio of the small head sheave 10 and the large head sheave 9. The utility model has few investment and fast effect, and long stroke oil pumping unit can be realized.

Description

Combined head sheave type long stroke oil pumping unit

The utility model relates to a kind of pumping unit, especially for the long stroke pumping unit that has on the sucker rod oil well.

Along with the development of petroleum industry, long stroke pumping unit is paid attention to widely and is studied.The long stroke pumping unit that uses is diversified at present, is to utilize the physical dimension that increases by four connecting rods as front-located mode walking beam long stroke pumping unit, realize that maximum stroke reaches 6 meters, but this machine gross weight increases.Have plenty of chain-type long stroke pumping unit, its structure is complicated.

The purpose of this utility model is to be to overcome above-mentioned shortcoming part of the prior art, both original pumping unit has not been done big change and provide a kind of, and changing walking beam is compound head sheave, reaches the compound head sheave long stroke pumping unit of the purpose that increases stroke again.But little investment, instant effect, reliable operation.

The purpose of this utility model can reach by following measure: remove walking beam and horse head on the walking beam frame, fixing coaxial and the big or small head sheave of rotating are synchronously walked around two with wire rope and are connected with well head rope hanger, crossbeam respectively after taking turns.

The purpose of this utility model can also reach by following measure: above-mentioned big or small head sheave is an one, and little head sheave is 2 and arranges in big head sheave bilateral symmetry.

Fig. 1 is compound head sheave long stroke pumping unit configuration diagram;

Fig. 2 is compound head sheave section of structure.

Below in conjunction with accompanying drawing will the utility model is described in further detail:

For little investment, instant effect is not done big change to original pumping unit equipment, removes walking beam and horse head, replaces with compound big or

small head sheave

9,10, changes the purpose that two wheel diameter ratios reach the long stroke of sucker rod pumping motor-pumped well.It is on master bracket 13 by support 12 fixing coaxials 11 and the big or

small head sheave

9,10 of rotating synchronously, walk around two with wire rope 14.8 and be connected with well head rope hanger 15, crossbeam 7 respectively after taking turns; The two rope the other ends are fixed in respectively on the wheel, and its cornerite is decided by the design stroke.Above-mentioned two take turns and can be used as one, as shown in Figure 2, can be welded; For making stress balance, little head sheave is made as 2, arranges that in big head sheave bilateral symmetry the well head center line will be cut in bull wheel 9.

Produce needs for satisfying, can design the pumping unit of different length stroke; And its stroke length takes

turns

9,10 diameter ratios by two and crank 4 turning radius decide, and stroke of the present utility model can reach 8 meters.When be fixed on motor 2 on the base 1, speed reducer 3 drives cranks 4 rotation half cycles, drives a certain angle of little head sheave 10 rotations by connecting rod 5, crossbeam 7 and the wire rope 8 that is connected, this angle decides by designing stroke; Coaxial big head sheave is also rotated this angle synchronously, utilizes two wheel diameter ratios to change, and makes the suspension point on the big head sheave be increased Cheng Changdu accordingly.Wherein leg 6 is to strengthen master bracket.

The utility model has following advantage with the ratio of prior art: it is that head sheave reaches the purpose that increases stroke that original pumping unit is changed walking beam, but small investment, instant effect, spread.

Claims

1, a kind of compound head sheave long stroke pumping unit that is configured for sucker rod by the crank 4, connecting rod 5, the crossbeam 7 that are fixed in motor 2, the speed reducer 3 on the base 1 and driven, it is characterized in that: on master bracket 13, fixing coaxial 11 and the big or small head sheave 9,10 of rotating are synchronously walked around two with wire rope 14,8 and are connected with well head rope hanger 15, crossbeam 7 respectively after taking turns.

2, compound head sheave long stroke pumping unit as claimed in claim 1 is characterized in that: big or small head sheave 9,10 is one, and little head sheave is 2 and arranges in big head sheave bilateral symmetry.