CN201635719U - Downhole instrument pressure equalizer - Google Patents
Downhole instrument pressure equalizer Download PDFInfo
- Publication number
- CN201635719U CN201635719U CN2010201072521U CN201020107252U CN201635719U CN 201635719 U CN201635719 U CN 201635719U CN 2010201072521 U CN2010201072521 U CN 2010201072521U CN 201020107252 U CN201020107252 U CN 201020107252U CN 201635719 U CN201635719 U CN 201635719U
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- CN
- China
- Prior art keywords
- piston
- piston rod
- adapter
- waveguide filament
- magnetic ring
- 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 downhole instrument pressure equalizer, which comprises an equalizing shell, a waveguide wire, a magnetic ring and an electronic compartment; an upper adapter is mounted on one end of the equalizing shell, a lower adapter is mounted on the other end of the equalizing shell, a piston rod is coaxially mounted in the equalizing shell through the upper adapter and the lower adapter, and a piston is mounted on the piston rod; the waveguide wire is axially mounted in the piston rod; the magnetic ring is mounted in the piston, and is sleeved on the piston rod; and the electronic compartment, which is arranged in the upper adapter, locates the position of the magnetic ring by detecting the signal on the waveguide wire, and transmits the position signal to a ground-based system. Since the magnetic ring is arranged in the piston and the waveguide wire is arranged in the piston rod and used for detecting the position of the magnetic ring, the position of the piston in the equalizing shell can be located, whether the operation of the downhole equalizer is normal or not can be judged, and an instrument can be prevented from being injured due to the overhigh difference between the internal pressure and the external pressure of the instrument when the piston moves to an extreme position.
Description
Technical field
The utility model relates to a kind of downhole instrument pressurizer.
Background technology
The downhole instrument pressurizer is a telescoping ram class well logging downhole instrument important component part.The present pressurizer that uses, the dummy piston position can not be detected, run into that seizure of piston, equilibrium oil leak and equilibrium oil in cause piston motion to arrive limiting case during entrained gas, the terrestrial operation personnel can't know, the instrument inside and outside differential pressure increases, may cause the tool housing explosion, cause instrument damage.
The utility model content
The technical problems to be solved in the utility model provides a kind of downhole instrument pressurizer that can monitor the dummy piston position in real time.
In order to address the above problem, the utility model provides a kind of downhole instrument pressurizer to comprise:
The balance shell, an end of this balance shell is equipped with adapter, and the other end is equipped with down adapter, and piston rod is installed in the described balance shell with following adapter is coaxial by last adapter, and described upper cover of piston rod is equipped with piston;
Waveguide filament axially is installed in the described piston rod;
Magnet ring is installed on the described piston, and on the described piston rod of suit;
Electronic compartment is arranged on described going up on the adapter, and described electronic compartment is by detecting signal on the described waveguide filament determining the position of described magnet ring, and this position signalling is sent to ground system.
Preferably, be provided with the waveguide filament protection tube of protection waveguide filament in the described piston rod vertically, described waveguide filament protection tube is installed in the piston rod by leading truck.
The utility model is by being provided with magnet ring in piston; and waveguide filament is set in piston rod; detect the position of magnet ring by waveguide filament; thereby can determine the position of piston in the balance shell; again itself and theoretical piston position are compared; whether the work that just can judge the down-hole equalizer is normal; avoided because extreme position is arrived in piston motion; make the inside and outside two ends of instrument pressure reduction excessive and cause instrument damage; thereby help the terrestrial operation personnel and in time judge seizure of piston; equilibrium oil leak and equilibrium oil in entrained gas and cause the piston motion abnormal conditions; guaranteed the inside and outside reasonable pressure of instrument, thus the protection downhole instrument.
Description of drawings
Fig. 1 is the utility model structural representation.
The specific embodiment
As shown in Figure 1, the utility model comprises: balance shell 3, waveguide filament 15, magnet ring 8 and electronic compartment 13, concrete structure is as described below.
As shown in Figure 1, an end of balance shell 3 is equipped with adapter 1, and the other end is equipped with down adapter 9, and piston rod 7 is set with piston 5 by last adapter 1 and following adapter 9 coaxial being installed in the balance shell 3 on the piston rod 7.The end face of last adapter 1 is equipped with spring firmware 4, between piston 5 and spring firmware 4 piston spring 6 is installed.What piston 5 left ends (duty is the upper end) were filled is equilibrium oil, and right-hand member is (lower end) mud.Piston 5 slides along piston rod 7 under the medium differential pressure effect of two ends, realizes internal and external pressure balance.
Waveguide filament protection tube 10 is installed in the piston rod 7 vertically; waveguide filament 15 is installed in the waveguide filament protection tube 10; waveguide filament protection tube 10 is installed in the piston rod 7 by last leading truck 11 and following leading truck 12; last leading truck 11 is positioned at an end of the close last adapter 1 of waveguide filament protection tube 10, and following leading truck 12 is positioned at a close end of adapter 9 down of waveguide filament protection tube 10.Magnet ring 8 is installed on the piston 5, and on the piston set bar 7.Electronic compartment 13 is arranged on the adapter 1, and electronic compartment 13 is by detecting signal on the waveguide filament 15 determining the position of magnet ring 8, thereby just can determine piston 5 in the axial position of balance shell 3, and electronic compartment 13 is sent to ground system with this position signalling in real time.
During the utility model work, electronic compartment 13 will motivate pulse current on waveguide filament 15, and this electric current can produce pulse electromagnetic field around waveguide filament 15 when waveguide filament 15 is propagated.Coaxial assembling magnet ring 8 on piston 5, this magnet ring 8 can move at differential pressure action lower edge piston rod 7 with piston 5.When meet in the magnetic field of pulse current magnetic field and magnet ring 8 generations, thereby the magnetic field around the magnet ring changes and makes the waveguide filament of being made by magnetostriction materials 15 produce a torsional wave pulse in the position at magnet ring 8 places, and this pulse is passed back and detected by electronic compartment 13 along waveguide filament 15 with fixing speed.Can accurately determine the position at magnet ring 8 places, i.e. 5 positions of piston by the time difference of measuring pulse current and torsional wave.And with the pressure that shows by ground system, theoretical position that temperature calculates relatively, judge that whether normal piston 5 work, in time find potential faults.When piston 5 moves to when the upper and lower extreme position, the ground system prompting that gives the alarm, operating personnel take appropriate measures, and prevent that piston 5 from moving to extreme position.
In sum; it below only is preferred embodiment of the present utility model; be not to be used to limit protection domain of the present utility model; therefore; all any modifications of within spirit of the present utility model and principle, being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (2)
1. a downhole instrument pressurizer is characterized in that, comprising:
The balance shell, an end of this balance shell is equipped with adapter, and the other end is equipped with down adapter, and piston rod is installed in the described balance shell with following adapter is coaxial by last adapter, and described upper cover of piston rod is equipped with piston;
Waveguide filament axially is installed in the described piston rod;
Magnet ring is installed on the described piston, and on the described piston rod of suit;
Electronic compartment is arranged on described going up on the adapter, and described electronic compartment is by detecting signal on the described waveguide filament determining the position of described magnet ring, and this position signalling is sent to ground system.
2. downhole instrument pressurizer as claimed in claim 1 is characterized in that, is provided with the waveguide filament protection tube of protection waveguide filament in the described piston rod vertically, and described waveguide filament protection tube is installed in the piston rod by leading truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201072521U CN201635719U (en) | 2010-02-02 | 2010-02-02 | Downhole instrument pressure equalizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201072521U CN201635719U (en) | 2010-02-02 | 2010-02-02 | Downhole instrument pressure equalizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201635719U true CN201635719U (en) | 2010-11-17 |
Family
ID=43080208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201072521U Expired - Fee Related CN201635719U (en) | 2010-02-02 | 2010-02-02 | Downhole instrument pressure equalizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201635719U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389838A (en) * | 2014-10-23 | 2015-03-04 | 西安思坦仪器股份有限公司 | Hydraulic driving system for driving electrode telescoping ram |
| CN106979003A (en) * | 2017-05-09 | 2017-07-25 | 中国海洋石油总公司 | A kind of downhole instrument bypass type balanced structure |
| WO2021056951A1 (en) * | 2019-09-23 | 2021-04-01 | 中海油田服务股份有限公司 | Downhole oil level detection device |
-
2010
- 2010-02-02 CN CN2010201072521U patent/CN201635719U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389838A (en) * | 2014-10-23 | 2015-03-04 | 西安思坦仪器股份有限公司 | Hydraulic driving system for driving electrode telescoping ram |
| CN106979003A (en) * | 2017-05-09 | 2017-07-25 | 中国海洋石油总公司 | A kind of downhole instrument bypass type balanced structure |
| WO2021056951A1 (en) * | 2019-09-23 | 2021-04-01 | 中海油田服务股份有限公司 | Downhole oil level detection device |
| RU2761421C1 (en) * | 2019-09-23 | 2021-12-08 | Чайна Ойлфилд Сервисез Лимитед | Device for determining the oil level in a well |
| US11788405B2 (en) | 2019-09-23 | 2023-10-17 | China Oilfield Services Limited | Downhole oil level detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20180202 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |