CN103573248B - Magnetic interference measuring device for borehole - Google Patents
Magnetic interference measuring device for borehole Download PDFInfo
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- CN103573248B CN103573248B CN201210260678.4A CN201210260678A CN103573248B CN 103573248 B CN103573248 B CN 103573248B CN 201210260678 A CN201210260678 A CN 201210260678A CN 103573248 B CN103573248 B CN 103573248B
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- measurement apparatus
- magnetic disturbance
- disturbance measurement
- inner core
- guide shoe
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Abstract
The invention discloses a magnetic interference measuring device for a borehole. The magnetic interference measuring device comprises an electronic multi-point probe tube (1), an inner barrel (2), an outer barrel (3) and a guiding shoe (4), the electronic multi-point probe tube (1) is fixedly mounted in the inner barrel (2), the outer barrel (3) is nested outside the inner barrel (2), and the guiding shoe (4) is mounted at the lower end of the outer barrel (3). The active lag distance of the magnetic interference measuring device can be shortened within the measuring range of the magnetic interference measuring device, so that downhole data of the borehole can be accurately measured, and smooth construction of the borehole is ensured.
Description
Technical field
A kind of the present invention relates to exploitation field in oil field, in particular it relates to the magnetic disturbance measurement apparatus of drilling well.
Background technology
Due to the restriction of the seventies and eighties in last century drilling measuring technology, at present much still in the rail of the OW producing
There is very large deviation in track data, or even the OW having does not have orbital data.Carry out new directional well, level in OW region
In the work progress of well, new drilling well has become as a key technology in wellbore construction with offset well around barrier, anti-collision.Because
Once touching sleeve pipe accident in wellbore construction（Newly bore the oil well digging to come in contact with adjacent OW, lead to stepout well
Drill bit and offset well sleeve pipe collision, lead to the casing failure of offset well）, not only can affect the normal production of OW, or even lead
Cause this well can not produce, and the normal construction progress of drilling well can be slowed down, cause huge economic loss.Particularly in High angle
Directional well, in the construction of horizontal well, intersect anti-collision point due to existing between oil well, once going out near the position of anti-collision point
Existing abnormal conditions, that is, the measurement data of electronics multiple spot inserting tube is abnormal.In order to provide accurate basis for estimation to ground policymaker, that is,
The situation of sleeve pipe will be touched or ferromagnetic material in underground（Such as magnetic iron ore etc.）Deng thus reach to avoid touching sleeve pipe
Purpose it is therefore desirable to a kind of real information to provide down-hole for quick detection means.
At present, commonly used wireless while-drilling measuring device in drilling well and Multi point measuring apparatus, due to its installation site
Limit（Be typically only capable to be arranged on 3m above shaft bottom about position, in order to avoid being subject to the magnetic interference of drill bit）, its measurement result is all
With downhole data exist more than 3m delayed away from the accurate information in shaft bottom cannot be provided exactly, can only measure above shaft bottom
The well data of 3m right position.Due to currently use measurement inserting tube detect magnetic metal magnetic disturbance measurement range be about
2m, so existing measurement apparatus cannot be for there being the drilling well intersecting anti-collision point to provide accurate down-hole information.When wellbore construction mistake
When reaching the position near anti-collision point in journey, occur slow bore, drilling tool suppress jump etc. in the case of it is impossible to accurately judge shaft bottom and
The distance between sleeve pipe of offset well, leads to wellbore construction to there is very big risk.Accordingly, it would be desirable to one kind can solve the problem that the problems referred to above
Drilling well magnetic disturbance measurement apparatus.
Content of the invention
It is an object of the invention to provide a kind of magnetic disturbance measurement apparatus of drilling well, this magnetic disturbance measurement apparatus can shorten magnetic
Interferometry device delayed in the measurement range to magnetic disturbance measurement apparatus such that it is able to accurately measure the shaft bottom number of drilling well
According to it is ensured that being smoothed out of wellbore construction.
To achieve these goals, the present invention provides a kind of magnetic disturbance measurement apparatus of drilling well, and wherein, this magnetic disturbance measures
Device includes electronics multiple spot inserting tube, inner core, outer tube and guide shoe, and described electronics multiple spot inserting tube is fixedly mounted in described inner core, institute
State outer tube to be nested in outside described inner core, described guide shoe is arranged on the lower end of described outer tube.
Preferably, this magnetic disturbance measurement apparatus also includes overhead gage and lower baffle plate, and described overhead gage is arranged on described outer tube
Upper end, described lower baffle plate is arranged in described guide shoe, and described inner core is connected between described overhead gage and described lower baffle plate.
Preferably, described overhead gage and described lower baffle plate are provided with through hole.
Preferably, the bottom of described guide shoe is provided with the passage connecting with described through hole.
Preferably, this magnetic disturbance measurement apparatus also includes upper plug head and lower end cap, and this upper plug head and lower end cap are respectively provided with
At the two ends of described inner core, and described electronics multiple spot inserting tube is fixedly mounted on described lower end cap.
Preferably, this magnetic disturbance measurement apparatus also includes shock absorber part, the two ends of this shock absorber part respectively with described electronics multiple spot
Inserting tube and described lower end cap connect.
Preferably, described upper plug head and lower end cap are threadeded with the two ends of described inner core respectively, and described shock absorber part
Threaded with described lower end cap.
Preferably, described inner core, outer tube, guide shoe, overhead gage, lower baffle plate, upper plug head and lower end cap are all using non magnetic material
Material is made.
Preferably, described inner core, outer tube and guide shoe are made using 42CrMo, described overhead gage, lower baffle plate, upper plug head and under
Plug is made of copper.
Preferably, the lower end of described guide shoe is formed with chamfering.
Preferably, the length of described guide shoe is 0.2-1m.
Preferably, described guide shoe is connected using tapered tread with the lower end of described inner core, and the upper end of described outer tube is formed with
Tapered tread, for threadeding with non magnetic drill collar.
By technique scheme, because the lower end of outer tube is mounted directly guide shoe, and the length of guide shoe is shorter, is arranged on
Electronics multiple spot inserting tube in inner core can reach shaft bottom with being lowered into of drill bit, thus shortening the delayed of magnetic disturbance measurement apparatus
Away from so that delayed in the measurement range in magnetic disturbance measurement apparatus, with can accurately measure the downhole data of drilling well it is ensured that bore
Being smoothed out of well construction.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the sectional view of the magnetic disturbance measurement apparatus of the drilling well of the present invention；And
Fig. 2 is the partial enlarged drawing at the I of magnetic disturbance measurement apparatus of the drilling well shown in Fig. 1.
Description of reference numerals
1 electronics multiple spot inserting tube 2 inner core
3 outer tube 4 guide shoe
5 overhead gage 6 lower baffle plate
7 through hole 8 passage
9 upper plug head 10 lower end cap
11 shock absorber part 12 non magnetic drill collar
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
In the present invention, in the case of illustrating on the contrary, the noun of locality such as " upper and lower " of use typically refers to drill collar and exists
The higher position of motion or lower position in drilling well.
As shown in figure 1, the specific embodiment of the present invention provides a kind of magnetic disturbance measurement apparatus of drilling well, wherein, this magnetic
Interferometry device includes electronics multiple spot inserting tube 1, inner core 2, outer tube 3 and guide shoe 4, and described electronics multiple spot inserting tube 1 is fixedly mounted on
In described inner core 2, described outer tube 3 is nested in outside described inner core 2, and described guide shoe 4 is arranged on the lower end of described outer tube 3.
Because the lower end of outer tube 3 is mounted directly guide shoe 4, and the length of guide shoe 4 is shorter, is arranged on the electronics in inner core 2
Multiple spot inserting tube 1 can reach shaft bottom with being lowered into of drill bit, thus shorten magnetic disturbance measurement apparatus delayed away from so that delayed
In the measurement range in magnetic disturbance measurement apparatus, with can accurately measure the downhole data of drilling well it is ensured that wellbore construction suitable
Profit is carried out.
Specifically, magnetic disturbance measurement apparatus of the present invention delayed away from less than 2m, typically can reach 0.8m, i.e. electronics multiple spot
Inserting tube 1 can measure the downhole data of 0.8m position above the minimum point of drilling well, and electronics multiple spot inserting tube 1 can detect 2m model
Magnetic disturbance in enclosing is it is clear that shaft bottom is included within this measurement range.Therefore, abnormal conditions occur during wellbore construction
When, for example bore slowly, drilling tool is not jumped, terrestrial operation person can accurately analyze shaft bottom according to the measurement data of electronics multiple spot inserting tube 1
Magnetic disturbance, thus judging whether drill bit has reached the position near anti-collision point, that is, counter pushing away judges the sleeve pipe of offset well and new well
, whether within 2m, there is touching the situation of sleeve pipe it is ensured that construction is smoothed out to avoid and to face in the distance in shaft bottom between well.
In order to ensure that position in outer tube 3 for the inner core 2 fixes, as illustrated in fig. 1, it is preferred that this magnetic disturbance measurement apparatus is also
Including overhead gage 5 and lower baffle plate 6, described overhead gage 5 is arranged on the upper end of described outer tube 3, described lower baffle plate 6 be arranged on described in draw
In footwear 4, described inner core 2 is connected between described overhead gage 5 and described lower baffle plate 6.Can be in the upper end of outer tube 3 and guide shoe 4
Respectively machine table terrace, to install overhead gage 5 and lower baffle plate 6, and ensure the distance between overhead gage 5 and lower baffle plate 6 with interior
The length of cylinder 2 is of substantially equal, thus inner core 2 can be fixed between them being firmly held in outer tube 3 so that drilling well
During inner core 2 will not shake and height and position will not change.
As shown in Fig. 2 in order to ensure the circulation of the fluid in magnetic disturbance measurement apparatus it is preferable that described overhead gage 5 and described
Through hole 7 is provided with lower baffle plate 6.Through hole 7 generally arranges multiple, flows to the fluid in outer tube 3 from non magnetic drill collar 12（Such as mud
Slurry, drilling fluid etc.）Flow in the circular passage between outer tube 3 and inner core 2 by the through hole 7 on overhead gage 5, under then passing through again
Through hole 7 on baffle plate 6 flows out guide shoe 4 and reaches in drilling well, thus forming fluid circulation it is ensured that being smoothed out of wellbore construction.
In order to be more convenient the circulation of fluid, as shown in Figure 2 it is preferable that the bottom of described guide shoe 4 is provided with and described through hole
The passage 8 of 7 connections.Passage 8 is from the outside with magnetic disturbance measurement apparatus for the bottom of the downward insertion in the position of lower baffle plate 6 guide shoe 4
Space connects, thus the fluid flowing through the through hole 7 on lower baffle plate 6 can flow to space outerpace by passage 8, forms fluid and leads to
Road is it is ensured that being smoothed out of wellbore construction.
During measuring due to magnetic disturbance measurement apparatus, the position ensureing electronics multiple spot inserting tube 1 is needed to fix, with
Ensure the accurate of measurement data.As illustrated in fig. 1, it is preferred that this magnetic disturbance measurement apparatus also includes upper plug head 9 and lower end cap 10,
This upper plug head 9 and lower end cap 10 are separately positioned on the two ends of described inner core 2, and described electronics multiple spot inserting tube 1 is fixedly mounted on
On described lower end cap 10.By upper plug head 9 and lower end cap 10, electronics multiple spot inserting tube 1 is enclosed in inner core 2, high pressure resistant to be formed
Closing space, and the lower end of electronics multiple spot inserting tube 1 is fixedly connected with lower end cap 10, to ensure electronics multiple spot inserting tube 1 along interior
Cylinder 2 axially extending without there is larger motion so that the measurement data of magnetic disturbance measurement apparatus is accurate.
As depicted in figs. 1 and 2, during the use of magnetic disturbance measurement apparatus, in order to avoid collision etc. is to electronics multiple spot
Inserting tube 1 causes to damage it is preferable that this magnetic disturbance measurement apparatus also includes shock absorber part 11, the two ends of this shock absorber part 11 respectively with institute
State electronics multiple spot inserting tube 1 and described lower end cap 10 connects.Shock absorber part 11 can be made, for example using the material with necessarily elasticity
Rubber etc., thus play the effect of shock absorbing when magnetic disturbance measurement apparatus collide, prevents electronics multiple spot inserting tube 1 to be subject to
Clash into and damage, it is played a protective role.
For convenience install and connect, as depicted in figs. 1 and 2 it is preferable that described upper plug head 9 and lower end cap 10 respectively with
The two ends of described inner core 2 are threaded, and described shock absorber part 11 is threadeded with described lower end cap 10.Upper plug head 9 and lower stifled
Various connected modes between 10 and inner core 2, can be adopted, the suitable mode of such as riveting, clamping etc., made using threaded
Being connected firmly of upper plug head 9 and lower end cap 10, easy accessibility, cooperation is closely.In addition, upper plug head 9 and lower end cap 10 and inner core 2
Between sealing ring can also be set, to ensure the sealing of inner core 2.
Because magnetic disturbance measurement apparatus are to carry out Data acquisition and issuance by detecting the magnetic disturbance of magnetisable material, because
This, in order to avoid the magnetic disturbance measurement apparatus all parts of itself to the interference of its measurement result it is preferable that described inner core 2, outer
Cylinder 3, guide shoe 4, overhead gage 5, lower baffle plate 6, upper plug head 9 and lower end cap 10 are all made using nonmagnetic substance.Nonmagnetic substance can
Think rustless steel, copper, aluminum etc., it does not have magnetic and is difficult to be magnetized, the inner core 2 be therefore made up, outer tube of nonmagnetic substance
3rd, guide shoe 4, overhead gage 5, lower baffle plate 6, upper plug head 9 and lower end cap 10 will not cause magnetic disturbance to the measurement of electronics multiple spot inserting tube 1,
Ensure the accuracy of measurement data.
It is further preferred that described inner core 2, outer tube 3 and guide shoe 4 are made using 42CrMo, described overhead gage 5, lower baffle plate
6th, upper plug head 9 and lower end cap 10 are made of copper.42CrMo is unimach, has higher intensity and toughness so that interior
Cylinder 2（Its length is about 2.5m）, outer tube 3 and guide shoe 4 have higher fatigue strength and impact resistance, better mechanical property, fit
Underground work in drilling well.Copper has preferable processability, and cheap so that overhead gage 5, lower baffle plate 6, upper plug head 9
Manufacture with lower end cap 10 and processing are simple.
Because guide shoe 4 is arranged on the lower end of outer tube 3, as illustrated in fig. 1, it is preferred that the lower end of described guide shoe 4 is formed with down
Angle.Chamfering is preferably 45 °, thus can be good at playing guiding function during lower boring, reduces the resistance in drilling process
Power.
In order to shorten as much as possible magnetic disturbance measurement apparatus delayed away from thus ensureing the accurate of measurement data.Preferably,
The length of described guide shoe 4 be 0.2-1m so that magnetic disturbance measurement apparatus delayed away from for 0.8-1.5m, in magnetic disturbance measurement apparatus
Measurement range in such that it is able to magnetic disturbance near accurately detecting.
In order to ensure the connection fastening between guide shoe 4 and inner core 2 and between outer tube 3 and non magnetic drill collar 12, as Fig. 1 institute
Show that the upper end of described outer tube 3 is formed with circle it is preferable that described guide shoe 4 is connected using tapered tread with the lower end of described inner core 2
Taper thread, for threadeding with non magnetic drill collar 12.The button-type that tapered tread between guide shoe 4 and inner core 2 connects is 4A10, outward
Cylinder 3 and non magnetic drill collar 12 between tapered tread connect button-type be 4A11 × 4A10 so that between guide shoe 4 and inner core 2 and
Being connected firmly between outer tube 3 and non magnetic drill collar 12, good airproof performance, stabilized structure.
Describe the preferred embodiment of the present invention above in association with accompanying drawing in detail, but, the present invention is not limited to above-mentioned reality
Apply the detail in mode, in the range of the technology design of the present invention, multiple letters can be carried out to technical scheme
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy no longer separately illustrates.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it equally should be considered as content disclosed in this invention.
Claims (10)
1. a kind of magnetic disturbance measurement apparatus of drilling well are it is characterised in that this magnetic disturbance measurement apparatus includes electronics multiple spot inserting tube
(1), inner core (2), outer tube (3) and guide shoe (4), described electronics multiple spot inserting tube (1) is fixedly mounted in described inner core (2), described
Outer tube (3) is nested in described inner core (2) outward, and described guide shoe (4) is arranged on the lower end of described outer tube (3), described outer tube (3) upper
End be formed with tapered tread, for threadeding with non magnetic drill collar (12), this magnetic disturbance measurement apparatus also include overhead gage (5) and
Lower baffle plate (6), described overhead gage (5) is arranged on the upper end of described outer tube (3), and described lower baffle plate (6) is arranged on described guide shoe (4)
Interior, described inner core (2) is connected between described overhead gage (5) and described lower baffle plate (6), described overhead gage (5) and described lower block
Through hole (7) is provided with plate (6).
2. the magnetic disturbance measurement apparatus of drilling well according to claim 1 are it is characterised in that the bottom of described guide shoe (4) sets
It is equipped with the passage (8) connecting with described through hole (7).
3. the magnetic disturbance measurement apparatus of drilling well according to claim 1 are it is characterised in that this magnetic disturbance measurement apparatus is also wrapped
Include upper plug head (9) and lower end cap (10), this upper plug head (9) and lower end cap (10) are separately positioned on the two ends of described inner core (2), and
And described electronics multiple spot inserting tube (1) is fixedly mounted on described lower end cap (10).
4. the magnetic disturbance measurement apparatus of drilling well according to claim 3 are it is characterised in that this magnetic disturbance measurement apparatus is also wrapped
Include shock absorber part (11), the two ends of this shock absorber part (11) are connected with described electronics multiple spot inserting tube (1) and described lower end cap (10) respectively.
5. the magnetic disturbance measurement apparatus of drilling well according to claim 4 are it is characterised in that described upper plug head (9) and lower stifled
Head (10) is threadeded with the two ends of described inner core (2) respectively, and described shock absorber part (11) and described lower end cap (10) screw thread
Connect.
6. the magnetic disturbance measurement apparatus of the drilling well according to any one in claim 3-5 are it is characterised in that described inner core
(2), outer tube (3), guide shoe (4), overhead gage (5), lower baffle plate (6), upper plug head (9) and lower end cap (10) are all using nonmagnetic substance
Make.
7. the magnetic disturbance measurement apparatus of drilling well according to claim 6 are it is characterised in that described inner core (2), outer tube (3)
Made using 42CrMo with guide shoe (4), described overhead gage (5), lower baffle plate (6), upper plug head (9) and lower end cap (10) adopt copper
Become.
8. the magnetic disturbance measurement apparatus of drilling well according to claim 1 are it is characterised in that the lower end shape of described guide shoe (4)
Become to have chamfering.
9. the magnetic disturbance measurement apparatus of drilling well according to claim 1 are it is characterised in that the length of described guide shoe (4) is
0.2-1m.
10. the magnetic disturbance measurement apparatus of drilling well according to claim 1 are it is characterised in that described guide shoe (4) is interior with described
The lower end of cylinder (2) adopts tapered tread to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210260678.4A CN103573248B (en) | 2012-07-25 | 2012-07-25 | Magnetic interference measuring device for borehole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210260678.4A CN103573248B (en) | 2012-07-25 | 2012-07-25 | Magnetic interference measuring device for borehole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103573248A CN103573248A (en) | 2014-02-12 |
| CN103573248B true CN103573248B (en) | 2017-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210260678.4A Active CN103573248B (en) | 2012-07-25 | 2012-07-25 | Magnetic interference measuring device for borehole |
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Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2426132Y (en) * | 2000-06-01 | 2001-04-04 | 北京海蓝科技开发有限责任公司 | Float tube type electronic single-point inclination measuring instrument |
| GB0313281D0 (en) * | 2003-06-09 | 2003-07-16 | Pathfinder Energy Services Inc | Well twinning techniques in borehole surveying |
| CN2700556Y (en) * | 2004-04-16 | 2005-05-18 | 辽河石油勘探局 | Wireline steering tool for horizontal well with ultra-short radius |
| WO2008030982A2 (en) * | 2006-09-06 | 2008-03-13 | Multi-Shot Llc | Casing detection |
| US8322462B2 (en) * | 2008-12-22 | 2012-12-04 | Halliburton Energy Services, Inc. | Proximity detection system for deep wells |
| CN101482003A (en) * | 2009-02-09 | 2009-07-15 | 兴和鹏能源技术(北京)有限公司 | Drilling method for steam assisted gravity draining oil well |
| US20110080807A1 (en) * | 2009-10-02 | 2011-04-07 | Clampon, Inc. | Method for collision risk mitigation using intelligent non-invasive ultrasonic sensors for directional drilling |
| EP2317069A1 (en) * | 2009-10-30 | 2011-05-04 | Welltec A/S | Magnetic ranging system for controlling a drilling process |
| CN101713286B (en) * | 2009-11-04 | 2013-05-01 | 中国石油大学(北京) | Electromagnetic system for detecting distance between adjacent wells while drilling |
| US8917094B2 (en) * | 2010-06-22 | 2014-12-23 | Halliburton Energy Services, Inc. | Method and apparatus for detecting deep conductive pipe |
| CN102373917A (en) * | 2010-08-12 | 2012-03-14 | 刘永军 | Anti-collision system for monitoring casing pipe on wellhead |
| CN201874554U (en) * | 2010-11-02 | 2011-06-22 | 中国石油集团川庆钻探工程有限公司 | Shock absorber applicable to measurement-while-drilling probes |
| CN202031574U (en) * | 2011-04-15 | 2011-11-09 | 北京海蓝石油技术开发有限公司 | Probe of electronic single-shot multi-shot inclinometer |
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2012
- 2012-07-25 CN CN201210260678.4A patent/CN103573248B/en active Active
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