CN205503108U - A hollow lifting device for lateral liquid inlet in heavy oil well - Google Patents

Abstract

The utility model discloses a hollow lifting devices of viscous crude well side direction feed liquor, including last pump barrel, last plunger, lower pump barrel, lower plunger, go up the pump barrel lower extreme and connect pump barrel upper end down, it runs on in the pump barrel to go up the plunger, the plunger runs on down in the pump barrel down, go up the plunger center and pass a hollow connecting leg, the connection is held beyond the great wall to the lower prop the connecting leg, simultaneously down the plunger also is the open -core type structure, set up a side direction filling valve down on the pump barrel, the upper prop sets up the delivery valve beyond the great wall. The oil inlet is seted up to side direction filling valve bottom, and the upper end is then communicate the pump barrel inner chamber, and inboard department sets up the case at the oil inlet. The delivery valve sets up to the cone valve, connects at the plunger lower extreme. The utility model discloses make the viscous crude well not only can realize hollowly lifting, realize to add thinner or electrical heating the pump under, can also reduce that the viscous crude advances that valve resistance, hydraulic feed back simultaneously, aggravate increase of service life under the realization pump.

Description

A hollow lifting device for lateral liquid inlet in heavy oil well

technical field

The utility model relates to a lifting system for heavy oil wells in the petroleum industry, in particular to a hollow lifting device for side liquid inlet of heavy oil wells.

Background technique

As oilfield development enters the middle and later stages, oil prices fall, and cost reduction and efficiency increase have become the main direction of oilfield development. In heavy oil reservoirs, there are problems such as difficult wellbore fluid flow, large resistance of the rod string, slow down of the rod string, and low pump efficiency, which increase the difficulty of development. Therefore, some over-pump operations are often used in the lifting system of heavy oil wells, such as over-pump heating and over-pump injection. These operations rely on the hollow structure of the lifting system, that is, a normally open hollow channel is established from the wellhead to the pump. At present, the hollow lifting devices used in oil wells all use annular valves for the oil inlet and outlet valves. This annular valve itself has a hollow structure and is easy to build a hollow channel. However, the application of this annular valve in heavy oil wells has the problems of large oil inlet resistance, poor stability and short service life.

Utility model content

The purpose of this utility model is to provide a hollow lifting device for side liquid inlet of heavy oil well, so that the heavy oil well can not only realize hollow lifting, add viscosity reducing agent or electric heating under the pump, but also reduce the heavy oil inlet valve Resistance, hydraulic feedback, the realization of aggravation under the pump, prolonging the service life.

In order to achieve the above purpose, the utility model adopts the following technical scheme, a hollow lifting device for lateral liquid inlet of a heavy oil well, including an upper pump barrel, an upper plunger, a lower pump barrel, and a lower plunger, and the lower end of the upper pump barrel Connect the upper end of the lower pump barrel, the upper plunger runs in the upper pump barrel, the lower plunger runs in the lower pump barrel, the center of the upper plunger passes through a hollow connecting pipe, and the upper end of the lower plunger is connected to the At the same time, the lower plunger is also a hollow structure, a side oil inlet valve is arranged on the lower pump barrel, and an oil outlet valve is arranged on the upper plunger.

The bottom end of the lateral oil inlet valve is provided with an oil inlet, while the upper end is connected to the inner chamber of the upper pump cylinder, and a valve core is arranged inside the oil inlet.

The oil outlet valve is set as a cone valve, connected to the lower end of the plunger

The upper end of the upper pump cylinder is connected with an upper collar.

The lower end of the lower pump barrel is connected with the lower collar.

The upper end of the connecting pipe is connected with an upper joint.

The lower end of the lower plunger is connected with the lower joint.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The device realizes the addition of viscosity reducer under the pump or electric heating through hollow lifting, which can effectively reduce the viscosity of crude oil under the pump, improve the viscosity reduction effect and pump efficiency, and reduce the amount of viscosity reducer.

(2) The fixed valve offset can not only reduce the heavy oil inlet valve resistance and improve pump efficiency, but also prolong the service life of the oil inlet valve.

(3) Gravity aggravation technology and hydraulic boosting technology provide the down-moving force for the rod string, which can solve the problems of slow down-down and eccentric wear of the rod string in heavy oil highly deviated wells.

(4) The integration of injection and production can be realized by lifting the plunger of the device out of the pump barrel.

Description of drawings

Fig. 1 is a structural schematic diagram of a hollow lifting device for side liquid inlet of a heavy oil well of the present invention.

In the figure: 1-upper coupling, 2-upper joint, 3-upper pump barrel, 4-upper plunger, 5-oil outlet valve, 6-connecting pipe, 7-lower pump barrel, 8-lower plunger, 9 - side oil inlet valve, 10 - lower collar, 11 - lower joint.

detailed description

The detailed description and technical content of the present utility model are as follows with accompanying drawings. However, the accompanying drawings are only provided for reference and illustration, and are not used to limit the present utility model.

According to Fig. 1 , a hollow lifting device for laterally entering liquid in a heavy oil well includes an upper pump barrel 3, an upper plunger 4, a lower pump barrel 7, and a lower plunger 8, the lower end of the upper pump barrel is connected to the upper end of the lower pump barrel, The upper plunger runs in the upper pump barrel, the lower plunger runs in the lower pump barrel, the center of the upper plunger passes through a hollow connecting pipe 6, the upper end of the lower plunger is connected to the connecting pipe, and at the same time The lower plunger is also a hollow structure, a side oil inlet valve 9 is arranged on the lower pump barrel, and an oil outlet valve 5 is arranged on the upper plunger. The bottom end of the lateral oil inlet valve is provided with an oil inlet, while the upper end is connected to the inner chamber of the upper pump barrel, and a valve core is arranged inside the oil inlet. The oil outlet valve is set as a cone valve 5, which is connected to the lower end of the plunger. The upper end of the upper pump cylinder is connected with the upper collar 1 . The lower end of the lower pump cylinder is connected with the lower collar 10 . The upper end of the connecting pipe is connected with the upper joint 2 . The lower end of the lower plunger is connected to the lower joint 11 .

First, the upper end of the upper coupling 1 is connected with the tubing string, the lower end of the coupling 1 is connected with the upper end of the upper pump barrel 3, the lower end of the upper pump barrel 3 is connected with the upper end of the lower pump barrel 7, and the lower end of the lower pump barrel 7 is connected with the upper end of the side inlet valve 9 , the lower end of the side oil inlet valve 9 is connected with the upper end of the lower collar 10, the lower end of the lower collar 10 is connected with the lower tail pipe, and lowered into the designated position according to the combination design of the tubing string, and then the upper end of the upper joint 2 is connected with the hollow sucker rod, The lower end of the upper joint 2 is connected with the upper end of the upper plunger 4, the lower end of the plunger 4 is connected with the upper end of the oil outlet valve 5, the lower end of the oil outlet valve 5 is connected with the upper end of the connecting pipe 6, the lower end of the connecting pipe 6 is connected with the upper end of the lower plunger 8, and the lower joint The upper end of 11 is connected with the lower end of the lower plunger 8, and the lower end of the lower joint 11 is connected with the tool at the lower part. It is lowered into the designated position according to the combination of rods and columns, and the pump is touched, and the anti-shock distance can be lifted up to normal production. If the weight is increased under the pump, the lower end of the lower joint 11 can be connected with a weighting rod of the corresponding model and length. If the integrated technology of injection and production is adopted, during steam injection, lift the upper and lower plungers out of the upper and lower pump barrels to realize steam injection. Production.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the patent scope of the present utility model. Other equivalent changes using the patent spirit of the present utility model all belong to the patent scope of the present utility model.

Claims (7)

1. A hollow lifting device for lateral liquid inlet of a heavy oil well, characterized in that it comprises an upper pump barrel, an upper plunger, a lower pump barrel, and a lower plunger, the lower end of the upper pump barrel is connected to the upper end of the lower pump barrel, and the The upper plunger runs in the upper pump barrel, the lower plunger runs in the lower pump barrel, the center of the upper plunger passes through a hollow connecting pipe, the upper end of the lower plunger is connected to the connecting pipe, while the lower plunger It is also a hollow structure, a side oil inlet valve is arranged on the lower pump cylinder, and an oil outlet valve is arranged on the upper plunger. 2. A hollow lifting device for lateral liquid inlet of heavy oil well according to claim 1, characterized in that, the bottom end of the lateral oil inlet valve is provided with an oil inlet, while the upper end is connected to the inner chamber of the upper pump barrel, A spool is arranged inside the oil inlet. 3 . The hollow lifting device for lateral liquid inlet of heavy oil well according to claim 1 , wherein the oil outlet valve is configured as a cone valve and connected to the lower end of the plunger. 4 . 4. A hollow lifting device for lateral liquid inlet of heavy oil well according to claim 1, characterized in that, the upper end of the upper pump cylinder is connected with an upper coupling. 5 . The hollow lifting device for lateral liquid inlet of a heavy oil well according to claim 1 , wherein the lower end of the lower pump barrel is connected to a lower collar. 6 . 6 . The hollow lifting device for lateral liquid inlet of a heavy oil well according to claim 1 , wherein the upper end of the connecting pipe is connected to an upper joint. 7 . 7 . The hollow lifting device for lateral liquid inlet of heavy oil well according to claim 1 , wherein the lower end of the lower plunger is connected to the lower joint. 8 .