CN2908776Y - Double-pipe filling technological tube column - Google Patents
Double-pipe filling technological tube column Download PDFInfo
- Publication number
- CN2908776Y CN2908776Y CN 200520126744 CN200520126744U CN2908776Y CN 2908776 Y CN2908776 Y CN 2908776Y CN 200520126744 CN200520126744 CN 200520126744 CN 200520126744 U CN200520126744 U CN 200520126744U CN 2908776 Y CN2908776 Y CN 2908776Y
- Authority
- CN
- China
- Prior art keywords
- packer
- seal
- valve
- tubing string
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a dual string injection pipe string comprising an outer tube, an inner tube, a packer with a channel, a balance packer, a safety filling valve, a well cleanup packer, a support slip, a recycle valve, a sieve vessel, a pipe plug, a flow dividing check valve connected between the packer with a channel and the balance packer. The outer tube is connected to the packer with a channel, and the inner tube passes through the packer with a channel and is equipped in the flow dividing check valve. The balance packer is connected with the safety filling valve, the well cleanup packer, the support slip, the recycle valve, the sieve tube and the pipe plug in turn below. The utility model is capable of effective and precise division and filling, filling corrosion inhibitor, and is characterized in small amount of work and low cost, and is applied in gas injection or water injection process in oil extraction.
Description
One, technical field
The utility model relates to oil exploitation down-hole gas injection tubing string, particularly a kind of two-tube injection technology tubing string.
Two, background technology
At present, field use is in the process pipe string of gas injection, adopts the permanent packer of external import to add the structure of airtight button oil pipe mostly, and this tubing string shortcoming or deficiency are: 1. can not add corrosion inhibiter, make tubing string and the supporting tool of going up be subjected to corrosion and damage, reduce its intensity and application life; 2. can not layering inject, can only generally inject the gas injection poor effect; 3. the packer tubing string can't deblocking, by brill mill, well workover, replace tubes post need carry out large repairs operation, operation is many, the cost height.
Three, summary of the invention
The purpose of this utility model provides a kind of improved two-tube injection technology tubing string, and shortcoming or deficiency that it can overcome effectively or avoid existing in the above-mentioned prior art improve the gas injection effect effectively, carry out deblocking easily, discharge packer and repair the replace tubes post.
Two-tube injection technology tubing string described in the utility model, comprise outer tube, interior pipe, tape channel packer, balance packer, safe injection valve, flushing packer, supporting slip, circulating valve, screen casing and plug, also comprise the branch flow check valve that is connected between described tape channel packer and the balance packer, described outer tube is connected on the packer of tape channel, interior pipe passes the tape channel packer, install in minute flow check valve, be connected with safe injection valve, flushing packer, supporting slip, circulating valve, screen casing and plug in turn under the described balance packer.
Wherein, described minute flow check valve comprise top connection and on distributary base, lower contact, seal, piston and the piston seat and the spring that connect and install, install branch fluid, baffle ring, seal and diaphragm ring on distributary base in turn.Fluid top connected seal receptacle in described minute, was installed on baffle ring, seal and diaphragm ring on it, lower end closed, and lower part wall is provided with the interconnection hole, divides between fluid and seal receptacle and distributary base and the top connection to constitute the vertical passageway.Described piston is installed on the piston seat under the spring.Described seal is " V " shape structure that accompanies cloth, wire fabric.Described seal is " L " shape structure, installs in the piston lower end.
The utility model has following advantage compared with prior art:
1, owing to adopted the tape channel packer and divided the combined string of flow check valve, can carry out effectively, layered gas-injection accurately, improve injection efficiency;
2, each layer gas injection rate can at any time, in time be adjusted gas injection rate according to strata condition and design by the well head Ground Control, need not operation allotment down-hole valve, reduces flow chart, reduces operating cost;
3, can inject corrosion inhibiter easily, protective casing and injection string are avoided or corrosion mitigation;
4, divide flow check valve to open when gas injection, and close when stopping annotating, can prevent from that injecting gas from returning to tell, keep the stratum calmness, injection pressure is steady.
5, can replace separate layer water injection string.
Four, description of drawings
Fig. 1 is the utility model structural representation,
Fig. 2 is for pressing shunting check valve structure schematic diagram shown in Figure 1.
Five, the specific embodiment
Consult accompanying drawing, a kind of two-tube injection technology tubing string, comprise outer tube 1, interior pipe 2, tape channel packer 3, balance packer 5, safe injection valve 6, flushing packer 7, supporting slip 8, circulating valve 9, screen casing 10 and plug 11, also comprise the branch flow check valve 4 that is connected between described tape channel packer 3 and the balance packer 5, outer tube 1 is connected on the tape channel packer 3, interior pipe 2 passes tape channel packer 3, install in minute flow check valve 4, the balance packer is connected with safe injection valve 6 for 5 times in turn, flushing packer 7, supporting slip 8, circulating valve 9, screen casing 10 and plug 11.
Divide flow check valve 4 comprise top connection 41 and on distributary base 47, lower contact 412, seal 411, piston 49 and the piston seat 410 and the spring 48 that connect and install, install branch fluid 46, baffle ring 45, seal 43 and diaphragm ring 44 on distributary base 47 in turn.Divide fluid 46 tops to connect seal receptacle 42, be installed on baffle ring 45, seal 411 and diaphragm ring 44 on it, lower end closed, lower part wall is provided with the interconnection hole, divides between fluid 46 and seal receptacle 42 and distributary base 47 and the top connection 41 to constitute the vertical passageway.Piston 49 is installed on the piston seat under the spring 48 410.Seal 43 is for accompanying " V " shape structure of cloth, wire fabric.Seal 411 is " L " shape structure, installs in the piston lower end.
Claims (6)
1, a kind of two-tube injection technology tubing string, comprise outer tube, interior pipe, tape channel packer, balance packer, safe injection valve, flushing packer, supporting slip, circulating valve, screen casing and plug, it is characterized in that also comprising the branch flow check valve that is connected between described tape channel packer and the balance packer, described outer tube is connected on the packer of tape channel, interior pipe passes the tape channel packer, install in minute flow check valve, be connected with safe injection valve, flushing packer, supporting slip, circulating valve, screen casing and plug in turn under the described balance packer.
2, two-tube injection technology tubing string according to claim 1, it is characterized in that described minute flow check valve comprise top connection and on distributary base, lower contact, seal, piston and the piston seat and the spring that connect and install, install branch fluid, baffle ring, seal and diaphragm ring on distributary base in turn.
3, two-tube injection technology tubing string according to claim 2, it is characterized in that described minute fluid top connects seal receptacle, be installed on baffle ring, seal and diaphragm ring on it, lower end closed, lower part wall is provided with the interconnection hole, divides between fluid and seal receptacle and distributary base and the top connection to constitute the vertical passageway.
4, two-tube injection technology tubing string according to claim 2 is characterized in that described piston installs on the piston seat under the spring.
5, two-tube injection technology tubing string according to claim 2 is characterized in that described seal is " V " shape structure that accompanies cloth, wire fabric.
6, two-tube injection technology tubing string according to claim 2 is characterized in that described seal is " L " shape structure, installs in the piston lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520126744 CN2908776Y (en) | 2005-12-31 | 2005-12-31 | Double-pipe filling technological tube column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520126744 CN2908776Y (en) | 2005-12-31 | 2005-12-31 | Double-pipe filling technological tube column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2908776Y true CN2908776Y (en) | 2007-06-06 |
Family
ID=38127987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520126744 Expired - Fee Related CN2908776Y (en) | 2005-12-31 | 2005-12-31 | Double-pipe filling technological tube column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2908776Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377125B (en) * | 2008-10-08 | 2012-09-05 | 中国石化股份胜利油田分公司现河采油厂 | Water well acidizing and sand prevention liquid replacing apparatus |
| CN109184647A (en) * | 2018-08-24 | 2019-01-11 | 中国石油天然气股份有限公司 | Layered fireflood ignition gas injection pipe column and layered fireflood method |
| CN110685642A (en) * | 2018-06-20 | 2020-01-14 | 中国石油天然气股份有限公司 | Method for determining anti-corrosion process of acid gas well |
-
2005
- 2005-12-31 CN CN 200520126744 patent/CN2908776Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377125B (en) * | 2008-10-08 | 2012-09-05 | 中国石化股份胜利油田分公司现河采油厂 | Water well acidizing and sand prevention liquid replacing apparatus |
| CN110685642A (en) * | 2018-06-20 | 2020-01-14 | 中国石油天然气股份有限公司 | Method for determining anti-corrosion process of acid gas well |
| CN110685642B (en) * | 2018-06-20 | 2021-09-28 | 中国石油天然气股份有限公司 | Method for determining anti-corrosion process of acid gas well |
| CN109184647A (en) * | 2018-08-24 | 2019-01-11 | 中国石油天然气股份有限公司 | Layered fireflood ignition gas injection pipe column and layered fireflood method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |