CN101008381A

CN101008381A - Pumping system of rodless piston pump

Info

Publication number: CN101008381A
Application number: CN 200610002093
Authority: CN
Inventors: 李文才
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-25
Filing date: 2006-01-25
Publication date: 2007-08-01

Abstract

A non-rod plug pump oil pumping system substantially is formed by a well opening, an upper pump cylinder, a smooth rod, an upper plug, a small oil tube, a lower plug, a lower pump cylinder, a correcting fixer, a fixing valve, a screen tube, and a weight. The invention is characterized in that the invention uses small oil tube, upper pump cylinder, and upper plug to replace former oil pumping rod and oil tube; the upper pump cylinder and oil tube are fixed on the well opening; the lower pump cylinder and the correcting fixer can be fixed on the inner wall of muffle, or the lower plug via the plug connecting tube is fixed on the inner wall of muffle together with the correcting fixer. The invention can realize the low load of large pump and pumping oil in deep well, with low energy consumption and low cost.

Description

Pumping system of rodless piston pump

Technical field

The present invention relates to oil extraction machinery and equipment, specifically a kind of pumping system of rodless piston pump.

Background technique

At present, most widely used aspect petroleum production is that bar plunger pump oil pumping system is arranged, this technology has the advantage of himself, also exist simultaneously certain deficiency and defective: load is big when big pump, deep-well oil pumping, need large-scale pumping unit, cause low load with strong power easily, cause dual cost height, cost height, energy consumption height, efficient low.

Summary of the invention

It is big to the objective of the invention is when solving big pump that bar plunger pump oil pumping system technology exists, deep-well oil pumping load, need large-scale pumping unit, cause cost height, energy consumption height, inefficient problem, a kind of pumping system of rodless piston pump technology is provided, the little load when realizing big pump, deep-well oil pumping, the pumping unit type selecting is little, less energy consumption, the cost cost is low, saves activity duration and operating cost, and it is wide to adapt to the hole condition scope.

The object of the present invention is achieved like this:

A kind of pumping system of rodless piston pump, it mainly is made up of well head, tubing hanger, polished rod, lower plunger, following pump barrel, standing valve, screen casing;

Pump barrel is being housed below the tubing hanger, and the spacing upper connection of plunger is equipped with in the upper end of last pump barrel, the spacing lower contact of plunger is equipped with in the lower end, and they are with screwed connection and be fixed on the well head;

The upper and lower plunger of motion is housed in upper and lower pump barrel, the upper end of upper plug be equipped with upper travelling valve and and polished rod screwed connection, lower end to lower plunger by the lower end of little oil pipe screwed connection, lower plunger lower travelling valve is housed, they are the integral body of moving;

The upper end of following pump barrel is equipped with the spacing upper connection of plunger, lower end and the standing valve organizine is housed is linked to connect and set upright fixture, and by setting upright on the inwall that fixture is fixed on sleeve pipe;

Set upright fixture below screen casing, counterweight are housed, they are one with the screwed connection.

The lower end of described down pump barrel is equipped with the spacing lower contact of plunger, upper end and the pump barrel traveling valve is housed and is connected to the integral body of motion with little oil pipe.

The described upper end of setting upright fixture through plunger connecting tube connect lower plunger, standing valve, screen casing, counterweight are equipped with in the lower end, they are one with the screwed connection by setting upright on the inwall that fixture is fixed on sleeve pipe.

Described little oil pipe is a hollow rod.

Described counterweight is solid cast or oil pipe.

The present invention has following actively useful effect:

Characteristics of the present invention, it is the function that substitutes former R a T with little oil pipe and last pump barrel, upper plug, last pump barrel and tubing hanger are fixed on the well head together, following pump barrel and lower plunger are divided into two kinds of situations, a kind of is following pump barrel and set upright fixture and be fixed on together on the internal surface of sleeve pipe, and another kind is that lower plunger is through plunger connecting tube with set upright fixture and be fixed on the internal surface of sleeve pipe together.Because of the little oil pipe volume little in light weight, fluid column weight is also light, when pumping, leans on upper and lower stroke the upper and lower motion of whole tubing string, its payload is not subjected to the influence of oil well pump size, load is less when big relatively pump, deep-well oil pumping, whole oil pumping system cost little investment, energy consumption is little, so the pumping unit type selecting is just little, the little oil pipe cost adds up to cost much lower a lot of than plain tubing and two of sucker rods, be that little pumping unit is realized the ideal selection that big pump is taken out deeply, and play next time rod string less during pump detection and workover and reduced activity duration and operating cost, it is wide to adapt to the hole condition scope.

Description of drawings:

Fig. 1 is the tubular column structure schematic representation of the embodiment of the invention;

Fig. 2 is the tubular column structure schematic representation of another embodiment of the present invention;

Embodiment

Accompanying drawing number:

1. well head 2. tubing hangers

3. go up pump barrel 301. spacing upper connection 302. spacing lower contacts

4. polished rod

Upper plug 501. (on) traveling valve

6. little oil pipe

7. lower plunger 701. (descending) 702. plunger connecting tube of traveling valve

8. descend pump barrel 801. spacing upper connection 802. spacing lower contacts

803. pump barrel traveling valve

9. set upright fixture 901. standing valves

10. screen casing 11. counterweights 12. sleeve pipes

Please refer to Fig. 1, the present invention is a kind of pumping system of rodless piston pump, and it mainly is made up of well head 1, tubing hanger 2, polished rod 4, lower plunger 7, following pump barrel 8, standing valve 901, screen casing 10; Pump barrel 3 is being housed below the tubing hanger 2, the spacing upper connection 301 of plunger is equipped with in the upper end of last pump barrel 3, the spacing lower contact 302 of plunger is equipped with in the lower end, they are with screwed connection and be fixed on the well head 1, last, following pump barrel 3, be equipped with in 8 motion on,

lower plunger

5,7, the upper end of upper plug 5 be equipped with traveling valve 501 and and polished rod 4 screwed connections, the lower end to lower plunger 7 by little oil pipe 6 screwed connections, traveling valve 701 is equipped with in the lower end of lower plunger 7, they are the integral body of motion, the spacing upper connection 801 of plunger is equipped with in the upper end of following pump barrel 8, the lower end is equipped with standing valve 901 organizine and is linked to connect and set upright fixture 9, and by setting upright on the inwall that fixture 9 is fixed on sleeve pipe 12, set upright fixture 9 below screen casing 10 is housed, counterweight 11, they are one with the screwed connection.

Please refer to Fig. 2, the lower end of described down pump barrel 8 is equipped with the spacing lower contact 802 of plunger, upper end and pump barrel traveling valve 803 is housed and is connected to the integral body of motion with little oil pipe 6.The described upper end of setting upright fixture 9 through plunger connecting tube 702 connect lower plunger 7, standing valve 901, screen casing 10, counterweight 11 are equipped with in the lower end, they are one with the screwed connection by setting upright on the inwall that fixture 9 is fixed on sleeve pipe 12.

During enforcement, described little oil pipe 6 is a hollow rod.

Described counterweight 11 is solid cast or oil pipe.

Described each traveling valve is a prior art.

Working principle of the present invention:

Pumping system of rodless piston pump embodiment shown in Figure 1 is to do upper and lower to-and-fro motion by pumping unit drive polished rod 4, upper plug 5, little oil pipe 6, lower plunger 7; When upstroke, lower plunger 7 is up in following pump barrel 8, traveling valve 701 cuts out, make down the expert one-tenth of the pump chamber negative pressure of pump barrel 8, crude oil is just entered into down in the pump barrel 8 by screen casing 10 standing valve of opening 901 of flowing through by the shaft bottom, and upper plug 5 is up in last pump barrel 3 inter-syncs, traveling valve 501 cuts out and the crude oil that will go up in the pump barrel 3 is discharged well head; When down stroke, lower plunger 7 is descending in following pump barrel 8, standing valve 901 cuts out, and traveling valve 701, flow through little oil pipe 6, the upper plug 5 of the crude oil in the following pump barrel 8 through opening, the traveling valve through opening 501 flow in the pump barrel 3 again, and so reciprocal stroke is just continuously constantly crude oil extraction ground.Another embodiment shown in Figure 2 does upper and lower to-and-fro motion by pumping unit drive polished rod 4, upper plug 5, little oil pipe 6, following pump barrel 8; When upstroke, following pump barrel 8 is outside up lower plunger 7, pump barrel traveling valve 803 cuts out, make down the expert one-tenth of the pump chamber negative pressure of pump barrel 8, crude oil is just entered into down in the pump barrel 8 through plunger connecting tube 702, lower plunger 7 by screen casing 10 standing valve of opening 901 of flowing through by the shaft bottom, and upper plug 5 is up in last pump barrel 3 inter-syncs, traveling valve 501 cuts out and the crude oil that will go up in the pump barrel 3 is discharged well head; When down stroke, following pump barrel 8 lower plunger 7 outside descending, standing valve 901 cuts out, pump barrel traveling valve 803, flow through little oil pipe 6, the upper plug 5 of crude oil in the following pump barrel 8 through opening, the traveling valve through opening 501 flow in the pump barrel 3 again, and so reciprocal stroke is just continuously constantly crude oil extraction ground.The spacing upper connection 801 of the spacing upper connection 301 of last pump barrel 3, spacing lower contact 302 and following pump barrel 8, spacing lower contact 802, one play interconnect function, and the 2nd, in playing the lower tubular column operation, work the effect of lifting.

Claims

1. pumping system of rodless piston pump, it is characterized in that mainly by well head (1), tubing hanger (2), polished rod (4), lower plunger (7), pump barrel (8), standing valve (901), screen casing (10) are formed down:

In the below of tubing hanger (2) pump barrel (3) is housed, the spacing upper connection of plunger (301) is equipped with in the upper end of last pump barrel (3), the spacing lower contact of plunger (302) is equipped with in the lower end, and they are with screwed connection and be fixed on the well head (1);

Upper and lower plunger (5), (7) of motion are housed in upper and lower pump barrel (3), (8), the upper end of upper plug (5) be equipped with traveling valve (501) and and polished rod (4) screwed connection, lower end to lower plunger (7) by the lower end of little oil pipe (6) screwed connection, lower plunger (7) traveling valve (701) is housed, they are the integral body of moving;

The upper end of following pump barrel (8) is equipped with the spacing upper connection of plunger (801), lower end and standing valve (901) organizine is housed is linked to connect and set upright fixture (9), and is fixed on the inwall of sleeve pipe (12) by setting upright fixture (9);

Screen casing (10), counterweight (11) are housed in the below of setting upright fixture (9), and they are one with the screwed connection.

2. pumping system of rodless piston pump as claimed in claim 1 is characterized in that: the lower end of described down pump barrel (8) is equipped with the spacing lower contact of plunger (802), upper end and pump barrel traveling valve (803) is housed and is connected to the integral body of motion with little oil pipe (6).

3. pumping system of rodless piston pump as claimed in claim 1, it is characterized in that: standing valve (901), screen casing (10), counterweight (11) are equipped with through plunger connecting tube (702) connection lower plunger (7), lower end in the described upper end of setting upright fixture (9), and they are that one is fixed on the inwall of sleeve pipe (12) by setting upright fixture (9) with the screwed connection.

4. pumping system of rodless piston pump as claimed in claim 1 is characterized in that: described little oil pipe (6) is a hollow rod.

5. pumping system of rodless piston pump as claimed in claim 1 is characterized in that: described counterweight (11) is solid cast or oil pipe.