CN201574746U

CN201574746U - Layered testing pump for oilfield producing well

Info

Publication number: CN201574746U
Application number: CN2009200944614U
Authority: CN
Inventors: 樊庆海; 安永民; 樊庆新; 杨玉军
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-29
Filing date: 2009-09-29
Publication date: 2010-09-08
Anticipated expiration: 2019-09-29

Abstract

The utility model provides a layered testing pump for an oilfield producing well. On the basis of the conventional oil-well pump, an outer pump cylinder is sleeved outside an inner pump cylinder and connected with an upper joint; an outer ring-shaped channel is formed between the outer pump cylinder and the inner pump cylinder; a through hole is formed at the upper part of the inner pump cylinder and communicated with the outer ring-shaped channel; an assembly part, which is formed by connecting a bottom valve cover, a core and a lower joint, is connected with the lower part of the inner pump cylinder, so as to form a liquid inlet channel from a liquid inlet hole to the inner pump cylinder, and a side hole for communicating the outer ring-shaped channel with a pump bottom; the core is connected with the bottom valve cover; the lower joint is connected with the outer pump cylinder, so as to form a ring-shaped channel between the inner pump cylinder and the outer pump cylinder; and a high-pressure branch is formed above a pump piston and below a pump. The utility model changes the traditional layered testing manner, can realize that the layered pressure restoration is tested after well shutdown in a normal flowing pressure production state, obtains the standard pressure restoration curve, accurately explains the reservoir bed seepage model and all the reservoir bed parameters under the model, and can obtain accurate liquid producing capacity and water content of partial intervals in starting to pump under the condition of distension sealing.

Description

A kind of oil well zonal testing pump

Technical field

The utility model provides a kind of oil well zonal testing pump, is used for the oil well delamination test, belongs to the oilfield monitoring technical field.

Background technology

The oil well delamination test mainly contains delaminating pressure testing and producing profile testing, these two kinds of tests are the important monitoring meanss of oil field development, be widely used, the zonal testing method of using is a lot of at present, delaminating pressure testing as widespread usage is by the test layer hop count, the packer, the piezometer tube (interior dress pressure gauge) that connect respective numbers with tubing string are lowered in the pit shaft, suppress the envelope that rises with the surface pump tank car and realize.The producing profile testing of widespread usage is to be undertaken by professional test team with special-purpose tester; The method of the two combine while test pressure and production profile also has, but process pipe string complexity, main pumping pipe string, common oil well pump, packer, piezometer tube (interior dress pressure gauge), the Piezoelectric switches etc. used, still need the pump tank car to suppress the envelope that rises, owing to once test rountrip often, cost is bigger, can't widespread usage.

From pressure measurement data quality and using value, common delaminating pressure testing stops well and job state owing to being in before surveying, can't accurately record the afterflow section of the nearly wellblock of reaction reservoir characteristic, be difficult to explain the reservoir flow model in porous media, can only use late-time portion data interpretation strata pressure and a small amount of reservoir parameter, benefit is lower, demands finding out better zonal testing method urgently.

Summary of the invention

The utility model provides a kind of oil well zonal testing pump, uses by this pump, changes the zonal testing mode, reduces testing cost, improves the zonal testing data quality, and has the value of generally applying.

Technical solution of the present utility model comprises: by top connection, transiting rod, piston head, on move about valve ball, on move about valve seat, transition segment, interior pump barrel, piston body, down the travelling valve cover, down move about valve ball, move about valve seat, piston tail, O type circle, bottom valve cover, bottom valve ball, bottom valve seat, fuse, lower contact constitutes the zonal testing pump down, wherein: the outside of pump barrel was connected with top connection in outer pump barrel was enclosed within, constitute the outer ring passage between outer pump barrel and the interior pump barrel, interior pump barrel top is provided with through hole and outer ring channel connection; Interior pump barrel bottom connects bottom valve cover, fuse and lower contact and connects into composite member, formed the side opening that inlet opening to the feed pathway and the outer annular passage of interior pump barrel is communicated with bottom pump, fuse top and bottom valve cover screwed connection, lower contact and outer pump barrel screwed connection, more than connect supporting relation and formed circular passage between inside and outside pump barrel, constitute the above high pressure branch road to pump of pump piston.

Test job principle of the present utility model

The utility model combined string structure: the drawing liquid tubing string+zonal testing pump+envelope that rises piston+piezometer tube+pressure reduction packer+piezometer tube+pressure reduction packer+piezometer tube+plug.

Testing procedure:

1, the ordinary production stage: liquid enters the pump inner chamber by test pump inlet opening in the pit shaft, the pump discharge opeing that makes progress, lifting liquid enters outer ring passage (envelope that rises passage) by intercommunicating pore, enter in the above tubing string of envelope piston that rises under the pump by the bottom side opening, before the envelope that rises piston is not opened, below the piston empty tube column, the packer envelope that do not rise.After the above tubing string of envelope piston that rises was full of, pump lifting liquid was discharged well head by pumping pipe string, realizes ordinary production, and can record stable stratified flow and press this moment.

2, the envelope that rises that builds the pressure: after producing fluid level in the pit shaft is normal, close well head and produce gate, open to take out and build the pressure, when well head pressure reaches design pressure, the envelope that rises piston shear pin is opened under the pressure differential effect up and down at piston, and the envelope that rises piston is with the lower tubular column feed liquor, this moment the pressure reduction packer in oil pipe with oil pipe outer ring space differential pressure action under the envelope that rises, each oil reservoir of packing, the beginning zonal testing.

3, survey zonal pressure and production profile: rising is honored as a queen stops each interval pressure recovery data of well surveying; Rising is honored as a queen, and a period of time that drives a well can record one section production fluid amount and moisture.

4,, also can realize attachedly helping certain downhole tool to carry out functions such as full well section producing profile testing and water blockoff because this pumping function.With other method of testing ratio, cost is minimum under the effect same condition.

5, this pump has been realized the zonal testing function through practical application.

Good effect of the present utility model is: change traditional zonal testing mode, zonal testing process pipe string and corresponding detection method are provided, can realize that beginning to stop the well surveying zonal pressure under ordinary production stream pressure condition recovers, can obtain the pressure build-up curve of standard, this pressure build-up curve can accurately be explained the reservoir flow model in porous media, and all reservoir parameters under this model, open the production fluid amount that can obtain part interval accurately and moisture of taking out under the strip of paper used for sealing spare that rises.Utilize in oil pumper swabbing pressure and the pit shaft pressure reduction ground artificial envelope that rises that builds the pressure, reduced the pump tank car envelope step that rises, reduced cost.

Description of drawings

Fig. 1 is the utility model structure principle chart;

1, top connection; 2, transiting rod; 3, outer pump barrel; 4, piston head; 5, valve ball moves about on; 6, valve seat moves about on; 7, transition segment; 8, interior pump barrel; 9, piston body; 10, following travelling valve cover; 11, the valve ball that moves about down; 12, the valve seat that moves about down; 13, piston tail; 14, O type circle; 15, bottom valve cover; 16, bottom valve ball; 17, bottom valve seat; 18, fuse; 19, lower contact; 20, outer ring passage; 21, inner chamber and outer ring passage top through hole; 22, the outer ring passage is communicated with side opening with the pump lower tubular column; 23, test pump inlet opening.

The specific embodiment

According to shown in Figure 1, the utility model is by top connection 1, transiting rod 2, outer pump barrel 3, piston head 4, on the valve ball 5 that moves about, on the valve seat 6 that moves about, transition segment 7, interior pump barrel 8, piston body 9, following travelling valve cover 10, under the valve ball 11 that moves about, under the valve seat 12 that moves about, piston tail 13, O type circle 14, bottom valve cover 15, bottom valve ball 16, bottom valve seat 17, fuse 18, lower contact 19 constitutes, wherein: the outside of pump barrel 8 was connected with top connection 1 in outer pump barrel 3 was enclosed within, constitute outer ring passage 20 between outer pump barrel 3 and the interior pump barrel 8, interior pump barrel 8 tops are provided with through hole 21 and are communicated with outer ring passage 20; Interior pump barrel 8 bottoms connect bottom valve cover 15, fuse 18 connects into composite member with lower contact 19, formed the side opening 22 that inlet opening 23 to the feed pathway and the outer annular passage 20 of interior pump barrel 8 is communicated with the pump bottom, fuse 18 tops and bottom valve cover 15 screwed connections, lower contact 19 and outer pump barrel 3 screwed connections, more than connect supporting relation and formed circular passage between inside and outside pump barrel, constitute the above high pressure branch road to pump of pump piston.

Claims

1. oil well zonal testing pump, comprise: top connection (1), transiting rod (2), piston head (4), on the valve ball (5) that moves about, on the valve seat (6) that moves about, transition segment (7), interior pump barrel (8), piston body (9), following travelling valve cover (10), under the valve ball (11) that moves about, under the valve seat (12) that moves about, piston tail (13), O type circle (14), bottom valve cover (15), bottom valve ball (16), bottom valve seat (17), fuse (18), lower contact (19), it is characterized in that: the outside that outer pump barrel (3) is enclosed within interior pump barrel (8) is connected with top connection (1), constitute outer ring passage (20) between outer pump barrel (3) and the interior pump barrel (8), interior pump barrel (8) top has through hole (21) and is communicated with outer ring passage (20); Interior pump barrel (8) bottom connects bottom valve cover (15), fuse (18) connects into composite member with lower contact (19), has formed the side opening (22) that inlet opening (23) to the feed pathway and the outer annular passage (20) of interior pump barrel (8) is communicated with bottom pump; Fuse (18) top and bottom valve cover (15) screwed connection, lower contact (19) and outer pump barrel (3) screwed connection form circular passage between inside and outside pump barrel, constitute the above high pressure branch road to pump of pump piston.