CN202900258U - Oilwell underpit pressure testing system - Google Patents
Oilwell underpit pressure testing system Download PDFInfo
- Publication number
- CN202900258U CN202900258U CN 201220584070 CN201220584070U CN202900258U CN 202900258 U CN202900258 U CN 202900258U CN 201220584070 CN201220584070 CN 201220584070 CN 201220584070 U CN201220584070 U CN 201220584070U CN 202900258 U CN202900258 U CN 202900258U
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- tubule
- current limliting
- switch
- sleeve pipe
- testing system
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Abstract
The utility model discloses an oilwell underpit pressure testing system which comprises a sleeve and a sealing pipe column going down into the sleeve. The bottom of the sealing pipe column is hermetically packed to form a closed part, an annulus between the sealing pipe column and an oilwell is formed by means of packing between the same through a hydraulic packer, an underpit quick switch is mounted on the sealing pipe column, and a memory piezometer is mounted at the bottom of the sealing pipe column. The oilwell underpit pressure testing system can switch on the switch within microtime (0.1s) to form rectangular wave of relationship between flow and time so as to measure stratal information, especially near wellbore pollution area information which can be of guiding significance for taking acidizing or other oilwell production increasing measures afterwards.
Description
Technical field
The utility model relates to a kind of oil well pressure testing system, belongs to the oil well Well Test Technology field of Oil-Gas Field Development Engineering.
Background technology
At present, Oil-Gas Field Development Engineering need to be tested subsurface pressure, and Oil/gas Well test method commonly used is well testing.
Well testing is to put into sensor in the down-hole, carries out the switch well, tests out pressure signal, i.e. time dependent a series of data of pressure are then according to the anti-formation information of asking of Mathematical Modeling.
Conventional oil well test is to carry out switch at well head.But because pit shaft preserves the impact of effect, the elasticity on stratum is large, and is very large on the impact of test result.
Preserve effect in order to exempt well pit shaft, existing a kind of technical method is that sensor is put into the down-hole, then carries out switch in the down-hole.But because hydraulic line is longer, opening and closing need a process, and passing time is slow, about 2 minutes.Although this mode is better than well head switch in the past, the information that we are understood the near wellbore zone not enough.Because in 2 minutes, formation wave is passed 10m already with interior near wellbore zone, just has a lot of important informations not to be found, particularly the contaminated zone.And the judgement of the contaminated zone degree of depth determines that to us the measure of taking acidifying, pressure break etc. to separate depollution is very important.Also need to judge in addition the situation in crack, near wellbore zone.Because compression wave passes the near wellbore zone for a long time in the time of 2 minutes, and can't diagnose.
The utility model content
The utility model technical issues that need to address just are to overcome the defective of prior art, and a kind of oil well pressure testing system is provided, and it can open switch in instantaneous (0.1s), form the square wave of flow and time relationship.Thereby measure formation information, the information in nearly well contaminated zone particularly is for taking later on acidifying or other stimulation of well to have directive significance.
For addressing the above problem, the utility model adopts following technical scheme:
The utility model provides a kind of oil well pressure testing system, comprise sleeve pipe, be lowered to the sealing tubing string of sleeve pipe, sealed tube column bottom seal pack, form obturator, form the annular space that seals between tubing string and the sleeve pipe by the hydraulic packer packing between sealing tubing string and the sleeve pipe, on the sealing tubing string down-hole high-speed switch is installed, the sealed tube column bottom is equipped with the memory-type pressure meter.
Described down-hole high-speed switch comprises the switch urceolus, is provided with a current limliting tubule in the switch urceolus, and the annular space of described current limliting tubule top and sleeve pipe is connected, and is provided with the Current limited Control device in the current limliting tubule, and current limliting tubule bottom is by a diaphragm seal.
Perhaps, described down-hole high-speed switch comprises the switch urceolus, be provided with a current limliting tubule in the switch urceolus, the annular space of described current limliting tubule top and sleeve pipe is connected, be provided with the Current limited Control device in the current limliting tubule, current limliting tubule bottom is equipped with a magnet ring, and described magnet ring is connected with a movable iron plate, described movable iron plate sealing current limliting tubule bottom is provided with a limited block in the current limliting tubule of movable iron plate top.
Hydraulic packer is pressurizeed by hydraulic line by the ground hydraulic pump, realizes packing.
Down-hole of the present utility model high-speed switch can be opened switch in instantaneous (0.1s), form the square wave of flow and time relationship.Thereby measure formation information, the information in nearly well contaminated zone particularly is for taking later on acidifying or other stimulation of well to have directive significance.
Thereby, the utility model is a kind of simple to operate and can realize that the down-hole produces the novel well testing system of changes in flow rate fast, can open switch at instantaneous (in the 0.1s), form time and the discharge relation curve of rectangle, thereby solved the problem that is difficult to test the degree of depth in contaminated zone in the well testing process and realizes the accuracy of test curve.
The utility model has following beneficial effect compared with the prior art:
(1) thin-film material is applied in the design of down-hole switch, will realize opening with first few minutes, shorten to and realize fast changes in flow rate in the 0.1s, form flow and the time curve of rectangle, reach the expected test purpose, take fast data.
(2) cost easy and simple to handle is low, and test process need not to use the complex apparatus such as cable.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model embodiment 1 described high-speed switch sectional drawing.
Fig. 3 is the utility model embodiment 2 described high-speed switch sectional drawings.
Flow and the time history of Fig. 4 for using the utility model high-speed switch, common hydraulic downhole switch and conventional well head switch to record respectively.
The specific embodiment
Embodiment 1
As shown in Figure 1, the utility model provides a kind of oil well pressure testing system, comprise sleeve pipe 1, be lowered to the sealing tubing string 2 of sleeve pipe, sealed tube column bottom seal pack forms obturator, forms the annular space 4 that seals between tubing string and the sleeve pipe by hydraulic packer 3 packings between sealing tubing string and the sleeve pipe, hydraulic packer by hydraulic line 6 pressurizations, is realized packing by ground hydraulic pump 5.On the sealing tubing string down-hole high-speed switch 7 is installed, the sealed tube column bottom is equipped with memory-type pressure meter 8.
As shown in Figure 2, described down-hole high-speed switch comprises switch urceolus 10, is provided with a current limliting tubule 11 in the switch urceolus, and the annular space of described current limliting tubule top and sleeve pipe is connected, be provided with Current limited Control device 12 in the current limliting tubule, current limliting tubule bottom is by a diaphragm seal 13.
As shown in Figure 1, the utility model provides a kind of oil well pressure testing system, comprise sleeve pipe 1, be lowered to the sealing tubing string 2 of sleeve pipe, sealed tube column bottom seal pack forms obturator, forms the annular space 4 that seals between tubing string and the sleeve pipe by hydraulic packer 3 packings between sealing tubing string and the sleeve pipe, hydraulic packer by hydraulic line 6 pressurizations, is realized packing by ground hydraulic pump 5.On the sealing tubing string down-hole high-speed switch 7 is installed, the sealed tube column bottom is equipped with memory-type pressure meter 8.
As shown in Figure 3, described down-hole high-speed switch comprises switch urceolus 10, be provided with a current limliting tubule 11 in the switch urceolus, the annular space of described current limliting tubule top and sleeve pipe is connected, be provided with Current limited Control device 12 in the current limliting tubule, current limliting tubule bottom is equipped with a magnet ring 14, and described magnet ring is connected with a movable iron plate 15, described movable iron plate sealing current limliting tubule bottom is provided with a limited block 16 in the current limliting tubule of movable iron plate top.
Hydraulic packer is pressurizeed by hydraulic line by the ground hydraulic pump, realizes packing.
Down-hole of the present utility model high-speed switch can be opened switch in instantaneous (0.1s), form the square wave of flow and time relationship.Thereby measure formation information, the information in nearly well contaminated zone particularly is for taking later on acidifying or other stimulation of well to have directive significance.
Flow and the time history of Fig. 4 for using the utility model high-speed switch, common hydraulic downhole switch and conventional well head switch to record respectively.Among Fig. 4,100 is flow and the time curve that uses the utility model high-speed switch to record, and forms the square wave of flow and time relationship.200 is flow and the time history that uses common hydraulic downhole switch to record, and 300 is flow and the time history that uses conventional well head switch to record.
It should be noted that at last: obviously, above-described embodiment only is for the utility model example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being amplified out thus or change still are among the protection domain of the present utility model.
Claims (3)
1. oil well pressure testing system, it is characterized in that: comprise sleeve pipe, be lowered to the sealing tubing string of sleeve pipe, sealed tube column bottom seal pack, form obturator, form the annular space that seals between tubing string and the sleeve pipe by the hydraulic packer packing between sealing tubing string and the sleeve pipe, on the sealing tubing string down-hole high-speed switch is installed, the sealed tube column bottom is equipped with the memory-type pressure meter.
2. oil well pressure testing system as claimed in claim 1, it is characterized in that: described down-hole high-speed switch comprises the switch urceolus, be provided with a current limliting tubule in the switch urceolus, the annular space of described current limliting tubule top and sleeve pipe is connected, be provided with the Current limited Control device in the current limliting tubule, current limliting tubule bottom is by a diaphragm seal.
3. oil well pressure testing system as claimed in claim 1, it is characterized in that: described down-hole high-speed switch comprises the switch urceolus, be provided with a current limliting tubule in the switch urceolus, the annular space of described current limliting tubule top and sleeve pipe is connected, be provided with the Current limited Control device in the current limliting tubule, current limliting tubule bottom is equipped with a magnet ring, described magnet ring is connected with a movable iron plate, described movable iron plate sealing current limliting tubule bottom is provided with a limited block in the current limliting tubule of movable iron plate top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220584070 CN202900258U (en) | 2012-11-08 | 2012-11-08 | Oilwell underpit pressure testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220584070 CN202900258U (en) | 2012-11-08 | 2012-11-08 | Oilwell underpit pressure testing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202900258U true CN202900258U (en) | 2013-04-24 |
Family
ID=48120941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220584070 Expired - Fee Related CN202900258U (en) | 2012-11-08 | 2012-11-08 | Oilwell underpit pressure testing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202900258U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806901A (en) * | 2012-11-08 | 2014-05-21 | 中国石油大学(北京) | Oil well downhole rapid test system and test method |
| CN111364957A (en) * | 2020-04-09 | 2020-07-03 | 中国石油天然气股份有限公司 | Miniaturized constant-current water distribution structure and detection device thereof |
-
2012
- 2012-11-08 CN CN 201220584070 patent/CN202900258U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806901A (en) * | 2012-11-08 | 2014-05-21 | 中国石油大学(北京) | Oil well downhole rapid test system and test method |
| CN103806901B (en) * | 2012-11-08 | 2016-06-08 | 中国石油大学(北京) | The method of testing of oil well fast testing system |
| CN111364957A (en) * | 2020-04-09 | 2020-07-03 | 中国石油天然气股份有限公司 | Miniaturized constant-current water distribution structure and detection device thereof |
| CN111364957B (en) * | 2020-04-09 | 2024-03-01 | 中国石油天然气股份有限公司 | Miniaturized constant-current water distribution structure and detection device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20131108 |