CN103573248A - Magnetic interference measuring device for borehole - Google Patents
Magnetic interference measuring device for borehole Download PDFInfo
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- CN103573248A CN103573248A CN201210260678.4A CN201210260678A CN103573248A CN 103573248 A CN103573248 A CN 103573248A CN 201210260678 A CN201210260678 A CN 201210260678A CN 103573248 A CN103573248 A CN 103573248A
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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
The present invention relates to the exploitation field in oil field, particularly, relate to a kind of magnetic disturbance measurement mechanism 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 orbital data of the OW of producing, there is very large deviation, the OW even having does not have orbital data.In OW region, carry out in the work progress of new directional well, horizontal well, new drilling well and offset well around barrier, anti-collision become a key technology in wellbore construction.Once because touch sleeve pipe accident in wellbore construction, (oil well that new brill digs and adjacent OW come in contact, cause the drill bit of stepout well and the collision of the sleeve pipe of offset well, the casing failure that causes offset well), not only can affect the normal production of OW, even cause this well not produce, and can slow down the normal construction progress of drilling well, cause huge economic loss.Particularly at the large directional well of gradient, in the construction of horizontal well, owing to existing between oil well, intersect anti-collision point, once there are abnormal conditions in the position of close anti-collision point, the survey data of electronics multiple spot inserting tube is abnormal.For basis for estimation being accurately provided to ground policymaker, will touch the situation of sleeve pipe or ferromagnetic material of underground appearance (such as magnetic iron ore etc.) etc., thereby reach the object of avoiding touching sleeve pipe, therefore need a kind of checkout gear fast that the real information of down-hole is provided.
At present, the wireless while-drilling measuring device and the Multi point measuring apparatus that in drilling well, generally adopt, because the restriction of its installation site (can only be arranged on the position of 3m left and right, top, shaft bottom conventionally, in order to avoid be subject to the magnetic interference of drill bit), all there is hysteresis distance more than 3m with shaft bottom data in its measurement result, cannot provide exactly the accurate information in shaft bottom, can only measuring well at the bottom of the well data of position, 3m left and right, top.The measurement category of surveying magnetic metal magnetic disturbance due to the measurement inserting tube using is now approximately 2m, so existing measurement mechanism cannot be for there being the drilling well of intersection anti-collision point that down-hole information is accurately provided.While arriving the position of the most close anti-collision point in wellbore construction process, occurring boring slowly, drilling tool is suppressed jumping etc. in the situation that, cannot accurately judge the distance between shaft bottom and the sleeve pipe of offset well, cause the very large risk of wellbore construction existence.Therefore the magnetic disturbance measurement mechanism that, needs a kind of drilling well that can address the above problem.
Summary of the invention
The magnetic disturbance measurement mechanism that the object of this invention is to provide a kind of drilling well, this magnetic disturbance measurement mechanism can shorten the hysteresis of magnetic disturbance measurement mechanism apart to the measurement category of magnetic disturbance measurement mechanism, thereby shaft bottom data that can Measurement accuracy drilling well, guarantee carrying out smoothly of wellbore construction.
To achieve these goals, the invention provides a kind of magnetic disturbance measurement mechanism of drilling well, wherein, this magnetic disturbance measurement mechanism comprises electronics multiple spot inserting tube, inner core, urceolus and guide shoe, described electronics multiple spot inserting tube is fixedly mounted in described inner core, described urceolus is nested in outside described inner core, and described guide shoe is arranged on the lower end of described urceolus.
Preferably, this magnetic disturbance measurement mechanism also comprises overhead gage and lower baffle plate, and described overhead gage is arranged on the upper end of described urceolus, and 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, on described overhead gage and described lower baffle plate, be provided with through hole.
Preferably, the bottom of described guide shoe is provided with the passage being communicated with described through hole.
Preferably, this magnetic disturbance measurement mechanism also comprises upper plug head and lower end cap, and this upper plug head and lower end cap are separately positioned on 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 mechanism also comprises shock absorber part, and the two ends of this shock absorber part are connected with described lower end cap with described electronics multiple spot inserting tube respectively.
Preferably, described upper plug head and lower end cap are threaded with the two ends of described inner core respectively, and described shock absorber part is threaded with described lower end cap.
Preferably, described inner core, urceolus, guide shoe, overhead gage, lower baffle plate, upper plug head and lower end cap all adopt nonmagnetic substance to make.
Preferably, described inner core, urceolus and guide shoe adopt 42CrMo to make, and described overhead gage, lower baffle plate, upper plug head and lower end cap are 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 adopts tapered tread to be connected with the lower end of described inner core, and the upper end of described urceolus is formed with tapered tread, for being threaded with non magnetic drill collar.
Pass through technique scheme, because guide shoe is directly installed in the lower end of urceolus, and the length of guide shoe is shorter, the electronics multiple spot inserting tube being arranged in inner core can arrive shaft bottom along with being lowered to of drill bit, thereby shortened the hysteresis distance of magnetic disturbance measurement mechanism, make to lag behind apart from the measurement category of magnetic disturbance measurement mechanism, the shaft bottom data with can Measurement accuracy drilling well, guarantee carrying out smoothly of wellbore construction.
Other features and advantages of the present invention partly in detail are described the specific embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for manual, is used from explanation the present invention, but is not construed as limiting the invention with the specific embodiment one below.In the accompanying drawings:
Fig. 1 is the sectional view of the magnetic disturbance measurement mechanism of drilling well of the present invention; And
Fig. 2 is the partial enlarged drawing at I place of the magnetic disturbance measurement mechanism of the drilling well shown in Fig. 1.
Description of reference numerals
1 electronics multiple spot inserting tube 2 inner cores
3 urceolus 4 guide shoes
5 overhead gage 6 lower baffle plates
7 through hole 8 passages
9 upper plug head 10 lower end caps
11 shock absorber part 12 non magnetic drill collars
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, the specific embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
In the present invention, in the situation that not doing contrary explanation, the noun of locality of use typically refers to as " upper and lower " higher position or the lower position that drill collar moves in drilling well.
As shown in Figure 1, the specific embodiment of the present invention provides a kind of magnetic disturbance measurement mechanism of drilling well, wherein, this magnetic disturbance measurement mechanism comprises electronics multiple spot inserting tube 1, inner core 2, urceolus 3 and guide shoe 4, described electronics multiple spot inserting tube 1 is fixedly mounted in described inner core 2, described urceolus 3 is nested in outside described inner core 2, and described guide shoe 4 is arranged on the lower end of described urceolus 3.
Because guide shoe 4 is directly installed in the lower end of urceolus 3, and the length of guide shoe 4 is shorter, the electronics multiple spot inserting tube 1 being arranged in inner core 2 can arrive shaft bottom along with being lowered to of drill bit, thereby shortened the hysteresis distance of magnetic disturbance measurement mechanism, make to lag behind apart from the measurement category of magnetic disturbance measurement mechanism, with shaft bottom data that can Measurement accuracy drilling well, guarantee carrying out smoothly of wellbore construction.
Particularly, the hysteresis of magnetic disturbance measurement mechanism of the present invention is apart from being less than 2m, generally can reach 0.8m, be the shaft bottom data that electronics multiple spot inserting tube 1 can be measured the 0.8m position, minimum point top of drilling well, and the magnetic disturbance that electronics multiple spot inserting tube 1 can detect within the scope of 2m, within obviously shaft bottom is included in this measurement category.Therefore, while there are abnormal conditions in the process of wellbore construction, for example brill, drilling tool are not jumped slowly, terrestrial operation person can be according to the magnetic disturbance in the survey data accurate analysis shaft bottom of electronics multiple spot inserting tube 1, thereby judge whether drill bit has arrived the position of close anti-collision point, whether the anti-distance that pushes away the sleeve pipe that judges offset well and the shaft bottom of new well in 2m, to avoid and to face the situation that occurs touching sleeve pipe between well, guarantees that construction carries out smoothly.
In order to guarantee the position of inner core 2 in urceolus 3, fix, as shown in Figure 1, preferably, this magnetic disturbance measurement mechanism also comprises overhead gage 5 and lower baffle plate 6, described overhead gage 5 is arranged on the upper end of described urceolus 3, described lower baffle plate 6 is arranged in described guide shoe 4, and described inner core 2 is connected between described overhead gage 5 and described lower baffle plate 6.Can be at upper end and the interior machine table terrace respectively of guide shoe 4 of urceolus 3, to install baffle plate 5 and lower baffle plate 6, and guarantee that the distance between overhead gage 5 and lower baffle plate 6 equates substantially with the length of inner core 2, thereby inner core 2 can be fixed between them, firmly remain in urceolus 3, make in the process of drilling well inner core 2 can not shake and height and position can not change.
As shown in Figure 2, in order to guarantee the fluid circulation in magnetic disturbance measurement mechanism, preferably, on described overhead gage 5 and described lower baffle plate 6, be provided with through hole 7.Through hole 7 arranges a plurality of conventionally, in the circular passage that fluid in non magnetic drill collar 12 flows to urceolus 3 (such as mud, drilling fluid etc.) flows between urceolus 3 and inner core 2 by the through hole 7 overhead gage 5, and then arrive in drilling well by the through hole 7 outflow guide shoes 4 on lower baffle plate 6, thereby formation Fluid Circulation, guarantees carrying out smoothly of wellbore construction.
For the circulation of more convenient fluid, as shown in Figure 2, preferably, the bottom of described guide shoe 4 is provided with the passage 8 being communicated with described through hole 7.Passage 8 connects the bottom of guide shoe 4 downwards and is communicated with the space outerpace of magnetic disturbance measurement mechanism from the position of lower baffle plate 6, thereby the fluid that flows through the through hole 7 on lower baffle plate 6 can flow to space outerpace by passage 8, form fluid passage, guarantee carrying out smoothly of wellbore construction.
In the process of measuring due to magnetic disturbance measurement mechanism, need to guarantee that the position of electronics multiple spot inserting tube 1 is fixed, with guarantee survey data accurately.As shown in Figure 1, preferably, this magnetic disturbance measurement mechanism also comprises upper plug head 9 and lower end cap 10, and 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 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, to form high voltage bearing enclosure space, and the lower end of electronics multiple spot inserting tube 1 is fixedly connected with lower end cap 10, to guarantee that electronics multiple spot inserting tube 1, along extending axially of inner core 2, larger moving can not occur, and makes the survey data of magnetic disturbance measurement mechanism accurate.
As depicted in figs. 1 and 2, in the process that magnetic disturbance measurement mechanism uses, for fear of collision etc., electronics multiple spot inserting tube 1 is caused to damage, preferably, this magnetic disturbance measurement mechanism also comprises shock absorber part 11, and the two ends of this shock absorber part 11 are connected with described lower end cap 10 with described electronics multiple spot inserting tube 1 respectively.Shock absorber part 11 can adopt to be had certain flexible material and makes, and such as rubber etc., thereby when magnetic disturbance measurement mechanism bumps, plays the effect of shock absorbing, prevents that electronics multiple spot inserting tube 1 from being clashed into and damaging, and plays a protective role to it.
For convenient, install and be connected, as depicted in figs. 1 and 2, preferably, described upper plug head 9 and lower end cap 10 are threaded with the two ends of described inner core 2 respectively, and described shock absorber part 11 is threaded with described lower end cap 10.Between upper plug head 9 and lower end cap 10 and inner core 2, can adopt various connected modes, suitable modes such as riveted joint, clamping, adopting is threaded makes being connected firmly of upper plug head 9 and lower end cap 10, and easy accessibility coordinates closely.In addition, between upper plug head 9 and lower end cap 10 and inner core 2, sealing ring can also be set, to guarantee the sealing of inner core 2.
Because magnetic disturbance measurement mechanism is to carry out data acquisition and analysis by detecting the magnetic disturbance of magnetisable material, therefore, interference for fear of all parts of magnetic disturbance measurement mechanism itself to its measurement result, preferably, described inner core 2, urceolus 3, guide shoe 4, overhead gage 5, lower baffle plate 6, upper plug head 9 and lower end cap 10 all adopt nonmagnetic substance to make.Nonmagnetic substance can be stainless steel, copper, aluminium etc., it does not have magnetic and is difficult for being magnetized, therefore inner core 2, urceolus 3, guide shoe 4, overhead gage 5, lower baffle plate 6, upper plug head 9 and the lower end cap 10 by nonmagnetic substance, made can not cause magnetic disturbance to the measurement of electronics multiple spot inserting tube 1, guarantee the accuracy of survey data.
Further preferably, described inner core 2, urceolus 3 and guide shoe 4 adopt 42CrMo to make, and described overhead gage 5, lower baffle plate 6, upper plug head 9 and lower end cap 10 are made of copper.42CrMo is unimach, has higher intensity and toughness, makes its length of inner core 2(be about 2.5m), urceolus 3 and guide shoe 4 have higher fatigue strength and impact resistance, better mechanical property, is suitable for the underground work of drilling well.Copper has good processability, and cheap, makes the manufacture of overhead gage 5, lower baffle plate 6, upper plug head 9 and lower end cap 10 and processing simple.
Because guide shoe 4 is arranged on the lower end of urceolus 3, as shown in Figure 1, preferably, the lower end of described guide shoe 4 is formed with chamfering.Chamfering is preferably 45 °, thereby in the process of lower brill, can be good at bringing into play guiding function, reduces the resistance in drilling process.
In order to shorten as much as possible the hysteresis distance of magnetic disturbance measurement mechanism, thereby guarantee the accurate of survey data.Preferably, the length of described guide shoe 4 is 0.2-1m, makes the hysteresis of magnetic disturbance measurement mechanism apart from for 0.8-1.5m, in the measurement category of magnetic disturbance measurement mechanism, thus near the magnetic disturbance can accurately detecting.
Fastening in order to guarantee the connection between guide shoe 4 and inner core 2 and between urceolus 3 and non magnetic drill collar 12, as shown in Figure 1, preferably, described guide shoe 4 adopts tapered tread to be connected with the lower end of described inner core 2, the upper end of described urceolus 3 is formed with tapered tread, for being threaded with non magnetic drill collar 12.The button-type that tapered tread between guide shoe 4 and inner core 2 connects is 4A10, the button-type that tapered tread between urceolus 3 and non magnetic drill collar 12 connects is 4A11 * 4A10, make being connected firmly between guide shoe 4 and inner core 2 and between urceolus 3 and non magnetic drill collar 12, good airproof performance, stabilized structure.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characterictic described in the above-mentioned specific embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible combinations.
In addition, between various embodiment of the present invention, also can be combined, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (12)
1. the magnetic disturbance measurement mechanism of a drilling well, it is characterized in that, this magnetic disturbance measurement mechanism comprises electronics multiple spot inserting tube (1), inner core (2), urceolus (3) and guide shoe (4), described electronics multiple spot inserting tube (1) is fixedly mounted in described inner core (2), described urceolus (3) is nested in outside described inner core (2), and described guide shoe (4) is arranged on the lower end of described urceolus (3).
2. the magnetic disturbance measurement mechanism of drilling well according to claim 1, it is characterized in that, this magnetic disturbance measurement mechanism also comprises overhead gage (5) and lower baffle plate (6), described overhead gage (5) is arranged on the upper end of described urceolus (3), described lower baffle plate (6) is arranged in described guide shoe (4), and described inner core (2) is connected between described overhead gage (5) and described lower baffle plate (6).
3. the magnetic disturbance measurement mechanism of drilling well according to claim 2, is characterized in that, on described overhead gage (5) and described lower baffle plate (6), is provided with through hole (7).
4. the magnetic disturbance measurement mechanism of drilling well according to claim 3, is characterized in that, the bottom of described guide shoe (4) is provided with the passage (8) being communicated with described through hole (7).
5. the magnetic disturbance measurement mechanism of drilling well according to claim 1, it is characterized in that, this magnetic disturbance measurement mechanism also comprises 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 described lower end cap (10).
6. the magnetic disturbance measurement mechanism of drilling well according to claim 5, is characterized in that, this magnetic disturbance measurement mechanism also comprises shock absorber part (11), and the two ends of this shock absorber part (11) are connected with described lower end cap (10) with described electronics multiple spot inserting tube (1) respectively.
7. the magnetic disturbance measurement mechanism of drilling well according to claim 6, it is characterized in that, described upper plug head (9) and lower end cap (10) are threaded with the two ends of described inner core (2) respectively, and described shock absorber part (11) is threaded with described lower end cap (10).
8. according to the magnetic disturbance measurement mechanism of the drilling well described in any one in claim 1-7, it is characterized in that, described inner core (2), urceolus (3), guide shoe (4), overhead gage (5), lower baffle plate (6), upper plug head (9) and lower end cap (10) all adopt nonmagnetic substance to make.
9. the magnetic disturbance measurement mechanism of drilling well according to claim 8, it is characterized in that, described inner core (2), urceolus (3) and guide shoe (4) adopt 42CrMo to make, and described overhead gage (5), lower baffle plate (6), upper plug head (9) and lower end cap (10) are made of copper.
10. the magnetic disturbance measurement mechanism of drilling well according to claim 1, is characterized in that, the lower end of described guide shoe (4) is formed with chamfering.
The magnetic disturbance measurement mechanism of 11. drilling wells according to claim 1, is characterized in that, the length of described guide shoe (4) is 0.2-1m.
The magnetic disturbance measurement mechanism of 12. drilling wells according to claim 1, it is characterized in that, described guide shoe (4) adopts tapered tread to be connected with the lower end of described inner core (2), and the upper end of described urceolus (3) is formed with tapered tread, for being threaded with non magnetic drill collar (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210260678.4A CN103573248B (en) | 2012-07-25 | 2012-07-25 | Magnetic interference measuring device for borehole |
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| CN201210260678.4A CN103573248B (en) | 2012-07-25 | 2012-07-25 | Magnetic interference measuring device for borehole |
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| CN103573248B CN103573248B (en) | 2017-02-08 |
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