CN201041039Y - Microelectrode array for measuring downhole shallow slurry electrical resistivity - Google Patents
Microelectrode array for measuring downhole shallow slurry electrical resistivity Download PDFInfo
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- CN201041039Y CN201041039Y CNU2007201041038U CN200720104103U CN201041039Y CN 201041039 Y CN201041039 Y CN 201041039Y CN U2007201041038 U CNU2007201041038 U CN U2007201041038U CN 200720104103 U CN200720104103 U CN 200720104103U CN 201041039 Y CN201041039 Y CN 201041039Y
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Abstract
A micro-electrode system of the utility model measuring the resistivity of shallow level mud in wells is used on oil logging tools, characterized in that: the base of the micro-electrode system and a pressing ring are shaped as circular cylinder made of metal. The outer wall of the base of the micro-electrode system is provided with a step, and an inner hole of the pressing ring is sleeved on the step of the outer wall of the micro-electrode system base. An insulation cushion is sleeved on the step of the micro-electrode system base, and an electrode ring is sleeved on the insulation cushion. The tightening screws are used to fixedly connect the micro-electrode system base, the insulation cushion and the pressing ring together. The electrode ring is connected with wire which passes through a cord-through hole on the wall of the micro-electrode system base. The effect is that: the utility model has precise structure, high bearing capability and good insulation performance, as well as good sealing performance; the welding of the electrode ring and wire is firm. Thus the utility model can accurately measure the resistivity of shallow level mud in wells and enhance the successful cases of well logging.
Description
Technical field
The utility model relates to oil exploration logging technique field, and particularly oil well logging instrument is a kind of microelectrode system of shallow-layer mud resistivity under the measuring well that is used on the logging instrument.Can accurately measure the resistivity of shallow-layer mud in the well.
Technical background
At present, in the well logging process, what measure the use of shallow-layer mud resistivity is a kind of microelectrode system.Its structure is shown in Fig. 1 a, Fig. 1 b and Fig. 1 c.Form by insulator foot 6 cylindraceous, main electrode 5, measurement electrode 4, measurement electrode 3, three groups of sealing contact pins 1 and O-ring seals 2.Three groups of sealing contact pins 1 are arranged side by side.Between sealing contact pin 1 and insulator foot 6, O-ring seals 2 is arranged.5 road annular recess are arranged on the outer wall of insulator foot 6.Main electrode 5 is to be that 1.6 millimeters iron wire twines 8 circles and forms on the annular recess of insulator foot 6 with diameter, and promptly an end of iron wire is connected with sealing contact pin 1 usefulness a high temperature scolding tin, after winding 8 is enclosed, with high temperature scolding tin each is enclosed iron wire and welds.In the groove of the both sides of main electrode 5 measurement electrode 4 is arranged respectively, it is 1.6 millimeters iron wire coiling two circles that measurement electrode 4 adopts diameters, and an end of iron wire is connected with another sealing contact pin 1 usefulness high temperature scolding tin respectively.A measurement electrode 3 is arranged respectively in the groove of measurement electrode 4 both sides, and measurement electrode 3 employing diameters are 1.6 millimeters iron wire coiling two circles, and an end of iron wire is connected with the 3rd sealing contact pin 1 usefulness high temperature scolding tin respectively.In the well logging process, the signal of main electrode 5 and two groups of measurement electrode 3,4 is passed to logger inside by 3 sealing contact pins 1 and matching component respectively and is handled.
Because insulator foot 6 adopts non-metal insulating material to make, it is low to bear pressure, the difficulty of conducting heat; The groove structure size of insulator foot 6 is narrow, makes welding procedure difficulty height, and the weld connection reliability is poor, causes the logging signal transfer reliability poor.After each in addition well logging, clean, maintain,, make troubles for on-the-spot the use to guarantee the insulating properties of electrode system to the electrode system position.The microelectrode system logging effect that well logging is at present used is poor, uses satisfaction rate low.
Summary of the invention
The purpose of this utility model is: the microelectrode system that shallow-layer mud resistivity under a kind of measuring well is provided, change the structure of original electrode system, improve the insulating properties and the bearing capacity of electrode system, can accurately measure the resistivity of shallow-layer mud in the well, improve the well logging success rate, reduce logging cost.Overcome the problem of existing electrode system functional reliability difference.
The technical solution adopted in the utility model is: the microelectrode system of shallow-layer mud resistivity under the measuring well comprises electrode system base 7, hold-down ring 12, felt pad 8, electrode retaining collar 9, sealing ring 10 and trip bolt 11.Electrode system base 7 and hold-down ring 12 are that employing is metal cylindric.On electrode system base 7 outer walls step is arranged, hold-down ring 12 inner hole sleeves are on the step of electrode system base 7 outer walls.On the step of electrode system base 7, be with felt pad 8, on felt pad 8, be with electrode retaining collar 9.Trip bolt 11 is connected and fixed electrode system base 7, felt pad 8 and hold-down ring 12.Electrode retaining collar 9 is connected with lead 13.Lead 13 passes the through wires hole 14 on electrode system base 7 walls.Lead can be connected with the matching component of logging instrument, signal is passed to logger inside handle.
The quantity of described felt pad 8 is 7, and the quantity of electrode retaining collar 9 is 6.There is an electrode retaining collar 9 position of electrode retaining collar 9 between per two felt pads 8 in the groove of felt pad 8 outer walls.Felt pad 8 is identical with the external diameter of electrode retaining collar 9.
Through wires hole 14 on described electrode system base 7 walls has 6, and the opening part of through wires hole 14 is on the inner face of electrode system base 7, and through wires hole 14 and trip bolt 11 holes are on same end face.
In order to make sealing, between electrode system base 7 and felt pad 8, between felt pad 8 and electrode retaining collar 9.Between felt pad 8 and hold-down ring 12, have 14 sealing rings 10.
The quantity of described trip bolt 11 screws is 3-6.
The beneficial effects of the utility model: the overall structure precision of the microelectrode system of shallow-layer mud resistivity under the utility model measuring well, bearing capacity and insulating properties height, good seal performance, electrode retaining collar and wire bonds are firm, the well logging back is rinsed well with clear water and is got final product, and does not need meticulous maintenance.The utility model electrode system can be worked under 155 ℃, the condition of 100MPa, and insulaion resistance is greater than 100M Ω under the HTHP, and measurement category is 0.01 Ω～10 Ω, and certainty of measurement is ± 3%.Overcome the deficiency of existing electrode system functional reliability difference.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Description of drawings
Fig. 1 a is existing microelectrode system external structure schematic diagram; Fig. 1 b is the lateral view of Fig. 1 a; Fig. 1 c is the schematic cross-section of Fig. 1 a.
Fig. 2 a is the cross-sectional view of the microelectrode system of shallow-layer mud resistivity under the utility model measuring well; Fig. 2 b is the lateral view of Fig. 2 a; Fig. 2 c is the local enlarged diagram of Fig. 2 a.
The specific embodiment
Embodiment 1: consult Fig. 2 c.The microelectrode system of shallow-layer mud resistivity under the utility model measuring well, its electrode system base 7 and hold-down ring 12 are to adopt cylindric that high-strength stainless steel makes, 75 millimeters of polar system base 7 maximum outside diameters, 36 millimeters of internal diameters.70 millimeters of hold-down ring 12 maximum outside diameters, 45 millimeters of internal diameters.On electrode system base 7 outer walls step is arranged, 45 millimeters of the external diameters of step.Hold-down ring 12 inner hole sleeves are on the step of electrode system base 7 outer walls.Be with 7 felt pads 8 on the step of electrode system base 7, the internal diameter of felt pad 8 also is 45 millimeters.Be with electrode retaining collar 9 on felt pad 8, the quantity of electrode retaining collar 9 is 6.There is an electrode retaining collar 9 position of electrode retaining collar 9 between per two felt pads 8 in the groove of felt pad 8 outer walls.Felt pad 8 is identical with the external diameter of electrode retaining collar 9, is 75 millimeters.Between electrode system base 7 and felt pad 8, between felt pad 8 and electrode retaining collar 9.Between felt pad 8 and hold-down ring 12, have 14 sealing rings 10.Consult Fig. 2 a and Fig. 2 b.5 trip bolts 11 are connected and fixed electrode system base 7, felt pad 8 and hold-down ring 12.Electrode retaining collar 9 is connected with lead 13.Lead 13 passes the through wires hole 14 on electrode system base 7 walls.Consult Fig. 2 b.Through wires hole 14 on electrode system base 7 walls has 6, and the opening part of through wires hole 14 is on the inner face of electrode system base 7, and through wires hole 14 and trip bolt 11 holes are on same end face.Corresponding through wires hole 14 is porose on felt pad 8, and lead 13 can be connected with the matching component of logging instrument with through wires hole 14 by the hole on the felt pad 8, signal is passed to logger inside handle.
Claims (7)
1. the microelectrode system of shallow-layer mud resistivity under the measuring well, comprise electrode system base (7), hold-down ring (12), felt pad (8), electrode retaining collar (9), sealing ring (10) and trip bolt (11), it is characterized in that: electrode system base (7) and hold-down ring (12) are that employing is metal cylindric, on electrode system base (7) outer wall step is arranged, hold-down ring (12) inner hole sleeve is on the step of electrode system base (7) outer wall, on the step of electrode system base (7), be with felt pad (8), on felt pad (8), be with electrode retaining collar (9), trip bolt (11) is with electrode system base (7), felt pad (8) and hold-down ring (12) are connected and fixed, electrode retaining collar (9) is connected with lead (13), and lead (13) passes the through wires hole (14) on electrode system base (7) wall.
2. the microelectrode system of shallow-layer mud resistivity under the measuring well according to claim 1, it is characterized in that: the quantity of described felt pad (8) is 7, the quantity of electrode retaining collar (9) is 6, the position of electrode retaining collar (9) is in the groove of felt pad (8) outer wall, an electrode retaining collar (9) is arranged between per two felt pads (8), and felt pad (8) is identical with the external diameter of electrode retaining collar (9).
3. the microelectrode system of shallow-layer mud resistivity under the measuring well according to claim 1, it is characterized in that: the through wires hole (14) on described electrode system base (7) wall has 6, the opening part of through wires hole (14) is on the inner face of electrode system base (7), and through wires hole (14) and trip bolt (11) hole are on same end face.
4. the microelectrode system of shallow-layer mud resistivity under the measuring well according to claim 1, it is characterized in that: between electrode system base (7) and felt pad (8), between felt pad (8) and electrode retaining collar (9), between felt pad (8) and hold-down ring (12), have 14 sealing rings (10).
5. the microelectrode system of shallow-layer mud resistivity under the measuring well according to claim 1 is characterized in that: the quantity of described trip bolt (11) screw is 3-6.
6. according to the microelectrode system of shallow-layer mud resistivity under claim 1 or 2 or 3 or the 4 or 5 described measuring wells, it is characterized in that: electrode system base (7), hold-down ring (12) and trip bolt (11) adopt stainless steel material to make.
7. according to the microelectrode system of shallow-layer mud resistivity under claim 1 or 2 or 3 or the 4 or 5 described measuring wells, it is characterized in that: it is porose to go up corresponding through wires hole (14) at felt pad (8), and the hole that lead (13) can pass through on the felt pad (8) is connected with the matching component of logging instrument with through wires hole (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201041038U CN201041039Y (en) | 2007-04-03 | 2007-04-03 | Microelectrode array for measuring downhole shallow slurry electrical resistivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201041038U CN201041039Y (en) | 2007-04-03 | 2007-04-03 | Microelectrode array for measuring downhole shallow slurry electrical resistivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201041039Y true CN201041039Y (en) | 2008-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201041038U Expired - Lifetime CN201041039Y (en) | 2007-04-03 | 2007-04-03 | Microelectrode array for measuring downhole shallow slurry electrical resistivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201041039Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337886A (en) * | 2010-07-22 | 2012-02-01 | 中国石油天然气集团公司 | System of performing down-hole measurement on oil gas in slurry while drilling |
| CN107060743A (en) * | 2016-12-29 | 2017-08-18 | 中国石油天然气集团公司 | A kind of mud resistivity probe |
| CN107489416A (en) * | 2017-10-09 | 2017-12-19 | 吴尽生 | The containment member and its installation method of a kind of microelectrode |
| CN108150159A (en) * | 2017-12-21 | 2018-06-12 | 中国电子科技集团公司第二十二研究所 | Logging instrument |
| CN111335883A (en) * | 2018-12-19 | 2020-06-26 | 河北环鼎石油设备有限责任公司 | Novel wire feeding pipe |
-
2007
- 2007-04-03 CN CNU2007201041038U patent/CN201041039Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337886A (en) * | 2010-07-22 | 2012-02-01 | 中国石油天然气集团公司 | System of performing down-hole measurement on oil gas in slurry while drilling |
| CN102337886B (en) * | 2010-07-22 | 2014-11-26 | 中国石油天然气集团公司 | System of performing down-hole measurement on oil gas in slurry while drilling |
| CN107060743A (en) * | 2016-12-29 | 2017-08-18 | 中国石油天然气集团公司 | A kind of mud resistivity probe |
| CN107489416A (en) * | 2017-10-09 | 2017-12-19 | 吴尽生 | The containment member and its installation method of a kind of microelectrode |
| CN108150159A (en) * | 2017-12-21 | 2018-06-12 | 中国电子科技集团公司第二十二研究所 | Logging instrument |
| CN111335883A (en) * | 2018-12-19 | 2020-06-26 | 河北环鼎石油设备有限责任公司 | Novel wire feeding pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080326 |