CN2687335Y

CN2687335Y - Dual-packing-cup hanging flow-measuring sealing section

Info

Publication number: CN2687335Y
Application number: CNU200420004718XU
Authority: CN
Inventors: 尹婷; 刘国君; 李安君; 王庆钢
Original assignee: 尹婷
Priority date: 2004-02-26
Filing date: 2004-02-26
Publication date: 2005-03-23
Anticipated expiration: 2014-02-26

Abstract

The utility model relates to a dual-packing-cup hanging flow-measuring sealing section, which solves the problems of the bad sealed effect and the short service life of the sealing section caused by the existing brittle sealing section packing-cup. The dual-packing-cup hanging flow-measuring sealing section is characterized in that a collection fluid (2) is hermetically arranged at the lower part of an upper contact (1) of a built-in flow meter (20) through a packing set (22), and overflowing holes (3, 8) and an overflowing channel (21) are arranged on the collection fluid (2). A collecting sheathing (7) is hermetically arranged on the external wall of the collection fluid (2) which is between the lower end of the overflowing (21) and the overflowing hole (8) through a packing set (6), a body (14) with steps (12) and a groove (13) is arranged outside the lower part of the collection fluid (2) and a hang paw (16), and a spring (10) which is sheathed outside the hang paw (16) is clipped with the body (14). Through a packing-cup (5), at the corresponding position of the lower end of the overflowing channel (21) and the overflowing holes (3, 8), the collection fluid (2) is connected with the collection sheathing (7), and the collection sheathing (7) is connected with the body (14). The dual-packing-cup hanging pressure-measuring sealing section has the advantages of good sealing effect of the sealing section, convenient throw and fetching, large born differential pressure, long service life and high accuracy of flow test.

Description

Double leather cup hanging flow rate test seal section

Technical field:

The utility model relates to a kind of oilfield test downhole tool, particularly double leather cup hanging flow rate test seal section.

Background technology:

In oilfield development process, water filling is to keep formation pressure, realizes oil field stable high yield and improves the effective ways of oil field development effect.Oil-field flooding divides commingled water injection and seperated layer water injection dual mode, seperated layer water injection is exactly in a bite water injection well, utilize packer that multiple zone is divided into some intervals, make it when adding persistent erection, low-permeability oil-bearing stratum flooding, by adjusting the size of downhole choke, the high permeability oil reservoir is controlled water filling.

Stratified flow rate test is by being lowered to flow meter and the flow rate test seal section is finished, what the bridge-type eccentric water filling was adopted is that the Chinese patent patent No. is the testing seal section of 01260125.X, this testing seal section is that two groups of leather cups that are positioned at logical liquid two ends are swallow-tail form, between two leather cups of every group spacer ring is housed, the diameter of leather cup can pass through threaded adjusting.The leather cup of sealing section must be that interference fit just can play sealing function with the seating nipple of injection well downhole flow regulator, therefore when dropping into seal section, be easy to damage leather cup, make leather cup lose due sealing function, the liquid that is injected flows through from seal cavity, cause test traffic inaccurate, moreover under the situation of downhole tool in fouling, seal section also is difficult to reach normal delivery status and plays sealing function.

The utility model content:

Cause for the leather cup that overcomes existing seal section is fragile seal section sealing effectiveness difference and application life short deficiency, the utility model provides a kind of double leather cup hanging flow rate test seal section, the sealing section adopts two-stage leather cup up and down, and it is gapped with the seating nipple center-aisle of injection well downhole flow regulator, the liquid spreading that leather cup imports by flowing hole is realized sealing, inject liquid all by flow meter, flow rate test is accurate; The sealing section has good sealing effect, pulling convenience, bears the characteristics that pressure reduction reaches long service life greatly.

The technical solution of the utility model is: a kind of double leather cup hanging flow rate test seal section comprises top connection and hangs pawl, the lower end of the top connection of built-in flow meter is equipped with collector by packing_seal, have two flowing holes and flow channels on the collector, the lower end of flow channels and the collector outer wall between the flowing hole are equipped with the afflux cover by packing_seal; Collector bottom and extension pawl are equipped with the band step outward and have the main body of groove, are enclosed within the spring of hanging outside the pawl and block mutually with main body; The lower end of corresponding flow channels and flowing hole place are by the continuous collector of leather cup and afflux cover and afflux cover and main body.

Above-mentioned leather cup can be fixed by the leather cup seat.

The beneficial effect that the utlity model has is: because the sealing section is equipped with collector in the lower end of the top connection of built-in flow meter by packing_seal, have two flowing holes and a flow channels on the collector, the lower end of flow channels and the collector outer wall between the flowing hole are equipped with the afflux cover by packing_seal, collector bottom and extension pawl are equipped with the band step outward and have the main body of groove, are enclosed within the spring of hanging outside the pawl and block mutually with main body; Under the effect of spring force, make and hang pawl and stretch out groove outside and collector is located; Corresponding flowing hole place is by the continuous collector of leather cup and afflux cover and afflux cover and main body, behind the collector location, the liquid spreading leather cup that imports through flowing hole has played the effect of sealing, injects liquid and all injects through flow meter, do not have leakage phenomenon, write down the injection rate of liquid really.

Description of drawings:

Accompanying drawing 1 is a structure sectional view of the present utility model.

1-top connection among Fig. 1,2-collector, 3-flowing hole, 4-leather cup seat, the 5-leather cup, 6-packing, 7-afflux cover, 8-flowing hole, 9-hangs pawl pin axle, 10-spring, 11-Ka Tai, 12-step, the 13-groove, the 14-main body, the 15-spring, 16-hangs pawl, the 17-locating detent, 18-bearing pin, 19-spring, the 20-flow meter, 21-flow channels, 22-packing.

The specific embodiment:

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

By shown in Figure 1, double leather cup hanging flow rate test seal section comprises top connection 1 and hangs pawl 16, the lower end of the top connection 1 of built-in flow meter 20 is equipped with collector 2 by packing 22 sealings, have flowing hole (3 on the collector 2,8) and flow channels 21, flowing hole (3,8) and flow channels 21 are liquid entrance hole and passage, and collector 2 outer walls between the lower end of flow channels 21 and the flowing hole 8 are equipped with afflux cover 7 by packing 6 sealings; Guaranteed the sealing between collector 2 and the afflux cover 7; Collector 2 bottoms are by hanging two symmetry extension pawls 16 that pawl pin axle 9 is connected with band card platform 11, symmetry is hung between the pawl 16 and is equipped with spring 15, collector 2 bottoms and the extension pawl 16 outer main bodys 14 that are equipped with band step 12 and have groove 13, being enclosed within the springs of hanging outside the pawl 16 10 blocks mutually with main body 14, the elastic force that extension pawl 16 overcomes spring 10 makes card platform 11 block mutually with step 12, hang pawl 16 and stretch out outside the groove 13, under the effect of spring 15 elastic force, make collector 2 be positioned at the seating nipple inwall of injection well downhole flow regulator; The lower end of corresponding flow channels 21 and flowing hole 8 places are by leather cup 5 continuous collectors 2 and afflux cover 7 and afflux cover 7 and main body 14, be equipped with spring 19 between two symmetrical locating detents 17, locating detent 17 is fixed on the main body 14 by bearing pin 18, and seal section is positioned in the seating nipple of injection well downhole flow regulator; Leather cup 5 can be fixing by leather cup seat 4, and the liquid spreading that leather cup 5 imports through flowing hole (3,8) is realized sealing function, therefore, injects liquid and all inject through flow meter 20, do not have leakage phenomenon, can record the injection rate of liquid really.

In real work, during delivery, when external force acts in the top connection 1, driving collector 2 moves down, locating detent 17 makes seal section be positioned at the inwall of injection well downhole flow regulator seating nipple under the effect of spring 19 elastic force, and collector 2 drives extension pawl 16 to be continued to move down, card platform 11 is blocked mutually with step 12, hang pawl 16 and stretch out outside the groove 13, under the effect of spring 15 elastic force, hang pawl 16 and block mutually with the seating nipple of injection well downhole flow regulator, make collector 2 location, the liquid that this moment, leather cup 5 imported through flowing hole (3,8) and spreading plays sealing function injects liquid all to inject through flow meter 20, do not have leakage phenomenon, can record the injection rate of liquid really.

During bailing, hang pawl 16 and overcome spring 15 elastic force at the undergauge place, in the withdrawal groove 13, card platform 11 is thrown off with step 12, drives on the collector 2 and moves, and leather cup 5 is regained untied sealing, the elastic force that this moment, locating detent 17 overcame spring 19 is regained and to be untied the location, makes the smooth bailing of seal section.

Since use this flow rate test seal section, leather cup 5 good sealing effects, flow is surveyed the accuracy height, and it is convenient to deliver, and it is big to bear pressure reduction, long service life.

Claims

1, a kind of double leather cup hanging flow rate test seal section, comprise top connection (1) and hang pawl (16), it is characterized in that: the lower end of the top connection (1) of built-in flow meter (20) is equipped with collector (2) by packing (22) sealing, collector has flowing hole (3 on (2), 8) and flow channels (21), collector (2) outer wall between the lower end of flow channels (21) and the flowing hole (8) is equipped with afflux cover (7) by packing (6) sealing; The outer main body (14) that is equipped with band step (12) and has groove (13) of collector (2) bottom and extension pawl (16) is enclosed within the spring of hanging outside the pawl (16) (10) and blocks mutually with main body (14); The lower end of corresponding flow channels (21) and flowing hole (3,8) are located by the continuous collector (2) of leather cup (5) and afflux cover (7) and afflux cover (7) and main body (14).

2, double leather cup hanging flow rate test seal section according to claim 1 is characterized in that: leather cup (5) can be fixing by leather cup seat (4).