CN101644136A - Combination of reaming stabilizer and bottom drilling device - Google Patents
Combination of reaming stabilizer and bottom drilling device Download PDFInfo
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- CN101644136A CN101644136A CN200810117784A CN200810117784A CN101644136A CN 101644136 A CN101644136 A CN 101644136A CN 200810117784 A CN200810117784 A CN 200810117784A CN 200810117784 A CN200810117784 A CN 200810117784A CN 101644136 A CN101644136 A CN 101644136A
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- stabilizer
- reaming hole
- reaming
- hole stabilizer
- cutting edge
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Abstract
The invention relates to a combination of a reaming stabilizer and a bottom drilling device. The reaming stabilizer comprises a hollow main body of the reaming stabilizer, wherein the periphery of themain body of the reaming stabilizer is evenly distributed with at least three blades which are arranged along the axis of the reaming stabilizer; and the upper and lower ends of the reaming stabilizer are provided with connecting threaded parts capable of being connected with an upper connector and a lower connector respectively. The combination of the invention overcomes the defects of the priortechnique; in a drilling process, the diameter of an initial borehole drilled by a bit is smaller than a preset borehole diameter and a cutting edge on the lower part of the reaming stabilizer is pressed against the upper end of the initial borehole, so that when borehole deviation occurs during the reaming of the initial borehole, a strong 'deviation reduction bending moment' is generated on thecutting edge on the lower part of the reaming stabilizer to balance the formation deviating effect and a quite big deviation reducing force is generated on the bit to realize deviation prevention andfast drilling.
Description
Technical field
The invention relates to a kind of drilling tool, especially a kind of in drilling process, can when creeping into fast, prevent to produce the reaming hole stabilizer and the Bottom Hole Assembly (BHA) of hole deviation.
Background technology
Drilling well is the basic means of petroleum natural gas exploration, and the anti-oblique problem of oil/gas drilling is a ubiquity but always fail a great technical barrier of fine solution in the oil/gas drilling engineering.Vertical drilling is anti-tiltedly to be one of key technical problem of drilling technology, and the straight well section of complex structural wells such as directional well, horizontal well, extended reach well is same to exist anti-oblique problem, and hole deviation is required strict more.High steep structure etc. is when easily tiltedly layer carries out drilling well in front of the mountains, the hole deviation problem is very serious, becoming a big technical bottleneck of the easy tiltedly layer of restriction for a long time bottom petroleum resources exploration and development process, also has been one of spinning DRILLING APPLICATION century-old technical barrier since petroleum industry.
Traditional anti-oblique technology comprises packed hole assembly and pendulum assembly.As shown in Figure 1, be a known rigidity packed hole assembly structural representation, constitute by drill bit 9 and stabilizer 91, and be connected by rigidity drill collar 92 between drill bit 9 and the stabilizer 91.This packed hole assembly can adopt bigger the pressure of the drill to creep into based on the rigidity of itself, helps improving drilling speed, and hole curvature is less, but does not produce drop angle power, therefore can not well straightening.
As shown in Figure 2, be a known pendulum assembly structural representation, constitute by drill bit 9 ' and stabilizer 91 ', and be connected by drill collar 92 ' between drill bit 9 ' and the stabilizer 91 '.This pendulum assembly can only produce very little drop angle power based on " pendulum principle ", is sacrificing the pressure of the drill even " the light pressure hung up and beaten " guarantees hole deviation control quality when bore meeting easily tiltedly layer, thereby makes the contradiction of creeping into fast with deviation control with drilling straight well more outstanding.
No. 200620124597.1 Chinese patent also discloses " a kind of combined type deviation prevention and fast instrument ", in the hope of addressing the above problem, but this combined type deviation prevention and fast instrument still exists not possess to produce powerful major defect of preventing oblique or drop angle moment of flexure effect owing to the anti-deflection drilling tool that is a kind of conventional belt bent sub makes up.
Summary of the invention
The purpose of this invention is to provide a kind of in drillng operation in case hole deviation occurs and can produce bigger drop angle power, when guaranteeing rapid drilling, can prevent to produce the reaming hole stabilizer and the Bottom Hole Assembly (BHA) of hole deviation.
A kind of reaming hole stabilizer of proposing of the present invention for this reason, wherein, described reaming hole stabilizer comprises: the reaming hole stabilizer body portion of hollow, the periphery of described reaming hole stabilizer body portion is evenly equipped with at least three wings, and described wing axially is provided with along described reaming hole stabilizer; The upper/lower terminal of described reaming hole stabilizer body portion has the connecting thread portion that can be connected with upper and lower joint respectively.
Aforesaid reaming hole stabilizer, wherein, described wing be straight sheet or in the shape of a spiral shape be arranged on the periphery of described reaming hole stabilizer body portion; The upper/lower terminal of described wing length direction tilts to the periphery wall of reaming hole stabilizer body portion respectively, forms the top cutting edge and the bottom cutting edge of inclination; The interlude of described wing forms the support portion.
Aforesaid reaming hole stabilizer, wherein, described top cutting edge and bottom cutting edge place are welded with composite polycrystal-diamond or diamond.
Aforesaid reaming hole stabilizer, wherein, the borehole diameter that the external diameter of described reaming hole stabilizer equals to stipulate.
The present invention also proposes a kind of Bottom Hole Assembly (BHA), and wherein, described Bottom Hole Assembly (BHA) comprises: reaming hole stabilizer, the upper end of described reaming hole stabilizer are provided with a common stabilizer, and the bottom is connected with drill bit; Wherein, described reaming hole stabilizer comprises the reaming hole stabilizer body portion of hollow, and the periphery of described reaming hole stabilizer body portion is evenly equipped with at least three wings, and described wing axially is provided with along described reaming hole stabilizer; The upper/lower terminal of described reaming hole stabilizer body portion has the connecting thread portion that can be connected with upper and lower joint respectively.
Aforesaid Bottom Hole Assembly (BHA), wherein, described bit diameter is less than the external diameter of described reaming hole stabilizer.
Aforesaid Bottom Hole Assembly (BHA) wherein, is connected by drill collar between described drill bit and reaming hole stabilizer, reaming hole stabilizer and the common stabilizer.
Aforesaid Bottom Hole Assembly (BHA), wherein, described wing be straight sheet or in the shape of a spiral shape be arranged on the periphery of described reaming hole stabilizer body portion; The upper/lower terminal of described wing length direction tilts to the periphery wall of reaming hole stabilizer body portion respectively, forms the top cutting edge and the bottom cutting edge of inclination; The interlude of described wing forms the support portion.
Aforesaid Bottom Hole Assembly (BHA), wherein, the top cutting edge of described reaming hole stabilizer and bottom cutting edge place are welded with composite polycrystal-diamond or diamond.
Aforesaid Bottom Hole Assembly (BHA), wherein, the borehole diameter that the external diameter of described reaming hole stabilizer equals to stipulate.
The present invention is provided with the reaming hole stabilizer by adopting on the top of drill bit, makes anti-oblique principle of the present invention be different from known anti-oblique principle fully, has overcome the anti-oblique major defect of poor efficiency that known anti-oblique technology exists in drilling process.Adopt reaming hole stabilizer of the present invention and Bottom Hole Assembly (BHA), in drilling process, because the diameter of the initial wellhole that drill bit bored is less than the well diameter of regulation, and the bottom cutting edge of reaming hole stabilizer is connected to the upper end of initial wellhole, when initial wellhole is carried out reaming, in case hole deviation occurs, can produce brute force " drop angle moment of flexure " at cutting edge place, the bottom of reaming hole stabilizer with balance stratum deflecting effect, and produce a very big drop angle power at the drill bit place, thereby can reach the purpose of deviation prevention and fast effectively.
Reaming hole stabilizer of the present invention is at drilling process, rotates with drill bit under the drive of drive unit and moves down, and the following cutting edge that is arranged on the wing on the reaming hole stabilizer body portion periphery expands initial wellhole to the borehole diameter of drilling engineering regulation.In the process that continues to creep into, the support portion that the interlude by wing forms constitutes the borehole wall to be supported, and plays the effect of stabilizer.The degree of depth and engine request according to institute's drilling well eye can be provided with one or more common stabilizers on the top of described reaming hole stabilizer, along with deepening continuously of creeping into, only the reaming hole stabilizer can produce the powerful drop angle moment of flexure of anti-hole deviation, and the common stabilizer of its interlude and portion disposed thereon can support well jointly.Wherein the reaming hole stabilizer has the function of " meeting the eye on every side stabilizer ", can eliminate the influence that hole diameter enlarges, overcome in present known drilling process at the common stabilizer of the whole uses in the top of drill bit, when hole deviation occurring, can produce the defective of bigger radial clearance between common stabilizer and the well, the defective of uncontrollable hole deviation.
Can suitably cut finishing to the borehole wall by the top cutting edge that is arranged on the reaming hole stabilizer, have the advantage of conveniently carrying brill.
Description of drawings
The following drawings only is intended to the present invention done and schematically illustrates and explain, not delimit the scope of the invention.Wherein,
Fig. 1 is positioned at the structural representation of well for known rigidity packed hole assembly;
Fig. 2 is positioned at the structural representation of well for known pendulum assembly;
Fig. 3 is the structural representation of an embodiment of reaming hole stabilizer of the present invention;
Fig. 4 is the structural representation of an embodiment of Bottom Hole Assembly (BHA) of the present invention;
Fig. 5 is the structural representation of another embodiment of reaming hole stabilizer of the present invention;
Fig. 6 is the partial schematic sectional view along A-A line among Fig. 3 or Fig. 5, schematically shows the structural relation of composite polycrystal-diamond and cutting edge.
The specific embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.Wherein, identical parts adopt identical label.
As shown in Figure 4, a kind of Bottom Hole Assembly (BHA) that the present invention proposes comprises: reaming hole stabilizer 2, and the bottom of described reaming hole stabilizer 2 is connected with drill bit 3, and the upper end is connected with common stabilizer 1.The quantity that described common stabilizer 1 is provided with is decided according to the degree of depth and the engine request of institute's drilling well eye, and definite method is identical with known method.
Wherein, the outside diameter d of reaming hole stabilizer 2 of the present invention (seeing also Fig. 3) equals the borehole diameter D of drilling engineering regulation.And the external diameter Φ of drill bit 3 is less than the external diameter of reaming hole stabilizer 2, the size drill bit is owed in formation, its model is carried out preferably according to the anti-characteristic of boring in stratum in known manner, and the difference of its diameter and institute's drilling well eye diameter is generally in 0.25～1.00 inch (1 inch=25.4 millimeters) scope.The borehole diameter D that the external diameter of described common stabilizer 1 is stipulated less than described drilling engineering, and have gap 8 between the borehole wall 4.
In the Bottom Hole Assembly (BHA) of the present invention, be connected by drill collar 5,6 between described drill bit 3 and reaming hole stabilizer 2, reaming hole stabilizer 2 and the common stabilizer 1, the specification of each drill collar 5,6 and each span length's degree are with known method, require to determine according to actual well drilled.The passage that described reaming hole stabilizer 2, common stabilizer 1 and each drill collar 5,6 inside all have hollow circulates for drilling fluid.
As shown in Figure 3, a kind of reaming hole stabilizer 2 that the present invention proposes, comprise: the reaming hole stabilizer body portion 20 of hollow, the periphery of described reaming hole stabilizer body portion 20 is evenly equipped with at least three wings 22, and the upper/lower terminal of described reaming hole stabilizer body portion 20 has the connecting thread portion 27,25 that can be connected with upper and lower joint 21,28 respectively.Wherein, described each wing 22 is the axial settings along described reaming hole stabilizer 2, wing 22 is the periphery that straight sheet is arranged on described reaming hole stabilizer body portion 20, and the periphery wall that the two ends of wing 22 length directions form respectively to reaming hole stabilizer body portion 20 tilts, and forms the top cutting edge 29 and the bottom cutting edge 23 of inclination.In order to improve the cutting hardness of cutting edge, preferably be welded with composite polycrystal-diamond at described top cutting edge 29 and bottom cutting edge 23 places, or other known high strength cutting blade, as: diamond etc.In the specific embodiment of the present invention, preferably 6 wings are set in that the periphery of described reaming hole stabilizer body portion 20 is uniform, to improve its cutting force.Adopt straight sheet wing 22 to have the advantage that is easy to process simple in structure.
As shown in Figure 5, another feasible embodiment is, described wing 22 ' also in the shape of a spiral shape be arranged on the periphery of described reaming hole stabilizer body 20, the periphery wall that the two ends of wing 22 ' length direction form respectively to reaming hole stabilizer body portion 20 tilts, form the top cutting edge 29 ' and the bottom cutting edge 23 ' that tilt, its interlude 201 ' forms the support portion of supporting the borehole wall.Described helical form wing 22 ' is compared with straight sheet wing 22, and its cutting force is more even.
As shown in Figure 3, be arranged on the top cutting edge 29 of described each wing 22 and the external diameter that the interlude 201 between the bottom cutting edge 23 has constituted reaming hole stabilizer 2 among the present invention.And in drilling process, each wing 22 interlude 201 forms the support portion, supports the borehole wall, has played the effect of stabilizer.Interlude 201 its structures of described wing 22 can with known stabilizer to the borehole wall support, the structure of stable support portion is identical, make by Hardmetal materials, also can be welded with composite polycrystal-diamond at described interlude 201 places, so that the support of 2 pairs of boreholes wall of reaming hole stabilizer of the present invention is more stable, improve its abrasion resistance.
As shown in Figure 6, be straight sheet or in the shape of a spiral shape be arranged on the bottom cutting edge 23,23 ' of the wing 22 of described reaming hole stabilizer body portion 20 peripheries or wing 22 ' and be provided with breach 231 (231 '), described composite polycrystal-diamond 232 (232 ') is provided with and is fixed in the described breach 231 (231 '), and end face and side that composite polycrystal-diamond 232 (232 ') protrudes cutting edge are provided with, form the cutwork sword, thereby can improve the abrasion resistance of cutting edge and the application life of reaming hole stabilizer 2.The structure of representing among described composite polycrystal-diamond and top cutting edge 29,29 ' structural relation and Fig. 7 is identical, repeats no more.
The top of described top connection 21 is connected with drill collar 5 by inside tapered thread 26, and the bottom is connected with reaming hole stabilizer body portion 20 by connecting thread portion 27.Described lower contact 28 tops are connected with reaming hole stabilizer body portion 20 by connecting thread portion 25, and the bottom is connected with drill collar 6 by inside tapered thread 24.
The course of work of the present invention and principle are: in drilling process, described drill bit 3 gets out the initial wellhole 7 that diameter is Φ under the drive of drive unit, and the reaming hole stabilizer 2 that is arranged on drill bit 3 tops rotates with drill bit 3 under the drive of drive unit and moves down, and the following cutting edge 23 that is arranged on the wing 22 on reaming hole stabilizer body portion 20 peripheries expands initial wellhole 7 to the borehole diameter D of drilling engineering regulation.In the process that continues to creep into,, play the effect of stabilizer by 201 pairs of boreholes wall formations of interlude support of wing 22.Along with deepening continuously of creeping into, reaming hole stabilizer 2 supports the borehole wall 4 jointly with the common stabilizer 1 of portion disposed thereon, and can produce the powerful drop angle moment of flexure of anti-hole deviation.Wherein the reaming hole stabilizer has the function of " meeting the eye on every side stabilizer ", can eliminate the influence that hole diameter enlarges, overcome in present known drilling process at the common stabilizer of the whole uses in the top of drill bit, when hole deviation occurring, can produce the defective of bigger radial clearance between common stabilizer and the well, the defective of uncontrollable hole deviation.
Carrying in the brill process after finishing drillng operation, the bit freezing for the local distortion that prevents the borehole wall, the present invention can suitably cut finishing to the borehole wall by the top cutting edge 29 of reaming hole stabilizer 2, conveniently to carry brill.
In order to overcome the anti-oblique major defect of poor efficiency that known anti-oblique technology exists in drilling process, Bottom Hole Assembly (BHA) of the present invention is provided with reaming hole stabilizer 2 by the top at drill bit 3, makes anti-oblique principle of the present invention be different from known anti-oblique principle fully.In drilling process, because the external diameter Φ of drill bit 3 is less than the maximum outside diameter d of reaming hole stabilizer, and less than the borehole diameter D that stipulates, the difference of two differences is in 0.25～1.00 inch scope, the size drill bit is owed in formation, then the diameter of the drill bit 3 initial wellhole 7 of being bored is less than the well diameter D of regulation, and the bottom cutting edge 23 of reaming hole stabilizer 2 is connected to the upper end of initial wellhole 6, in the moment that initial wellhole 6 is carried out reaming, in case hole deviation occurs, can produce brute force " drop angle moment of flexure " with balance stratum deflecting effect at the bottom of reaming hole stabilizer 2 cutting edge 23 places, and in very big drop angle power of drill bit place generation, thereby can guarantee that the drilling tool center overlaps with the well center, can effectively realize the purpose of deviation prevention and fast.
The above only is the schematic specific embodiment of the present invention, is not in order to limit scope of the present invention.Any those skilled in the art, equivalent variations and the modification done under the prerequisite that does not break away from design of the present invention and principle all should belong to the scope of protection of the invention.
Claims (10)
1, a kind of reaming hole stabilizer is characterized in that, described reaming hole stabilizer comprises: the reaming hole stabilizer body portion of hollow, and the periphery of described reaming hole stabilizer body portion is evenly equipped with at least three wings, and described wing axially is provided with along described reaming hole stabilizer; The upper/lower terminal of described reaming hole stabilizer body portion has the connecting thread portion that can be connected with upper and lower joint respectively.
2, reaming hole stabilizer as claimed in claim 1 is characterized in that, described wing be straight sheet or in the shape of a spiral shape be arranged on the periphery of described reaming hole stabilizer body portion; The upper/lower terminal of described wing length direction tilts to the periphery wall of reaming hole stabilizer body portion respectively, forms the top cutting edge and the bottom cutting edge of inclination; The interlude of described wing forms the support portion.
3, reaming hole stabilizer as claimed in claim 2 is characterized in that, described top cutting edge and bottom cutting edge place are welded with composite polycrystal-diamond or diamond.
4, as each described reaming hole stabilizer of claim 1-3, it is characterized in that the borehole diameter that the external diameter of described reaming hole stabilizer equals to stipulate.
5, a kind of Bottom Hole Assembly (BHA) is characterized in that, described Bottom Hole Assembly (BHA) comprises: reaming hole stabilizer, the upper end of described reaming hole stabilizer are provided with a common stabilizer, and the bottom is connected with drill bit; Wherein, described reaming hole stabilizer comprises the reaming hole stabilizer body portion of hollow, and the periphery of described reaming hole stabilizer body portion is evenly equipped with at least three wings, and described wing axially is provided with along described reaming hole stabilizer; The upper/lower terminal of described reaming hole stabilizer body portion has the connecting thread portion that can be connected with upper and lower joint respectively.
6, Bottom Hole Assembly (BHA) as claimed in claim 5 is characterized in that, described bit diameter is less than the external diameter of described reaming hole stabilizer.
7, as claim 5 or 6 described Bottom Hole Assembly (BHA), it is characterized in that, be connected by drill collar between described drill bit and reaming hole stabilizer, reaming hole stabilizer and the common stabilizer.
8, Bottom Hole Assembly (BHA) as claimed in claim 5 is characterized in that, described wing be straight sheet or in the shape of a spiral shape be arranged on the periphery of described reaming hole stabilizer body portion; The upper/lower terminal of described wing length direction tilts to the periphery wall of reaming hole stabilizer body portion respectively, forms the top cutting edge and the bottom cutting edge of inclination; The interlude of described wing forms the support portion.
9, Bottom Hole Assembly (BHA) as claimed in claim 8 is characterized in that, the top cutting edge of described reaming hole stabilizer and bottom cutting edge place are welded with composite polycrystal-diamond or diamond.
10, as claim 5 or 6 described Bottom Hole Assembly (BHA), it is characterized in that the borehole diameter that the external diameter of described reaming hole stabilizer equals to stipulate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810117784A CN101644136B (en) | 2008-08-06 | 2008-08-06 | Combination of reaming stabilizer and bottom drilling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810117784A CN101644136B (en) | 2008-08-06 | 2008-08-06 | Combination of reaming stabilizer and bottom drilling device |
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| CN101644136A true CN101644136A (en) | 2010-02-10 |
| CN101644136B CN101644136B (en) | 2012-09-05 |
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| CN200810117784A Active CN101644136B (en) | 2008-08-06 | 2008-08-06 | Combination of reaming stabilizer and bottom drilling device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373884A (en) * | 2010-08-17 | 2012-03-14 | 淮南矿业(集团)有限责任公司 | Borehole-enlarging and bottom-enlarging drill |
| CN103924927A (en) * | 2014-05-14 | 2014-07-16 | 衢州市易凡设计有限公司 | Pile hole intelligent expanding method |
| CN104120978A (en) * | 2013-04-28 | 2014-10-29 | 中国石油化工股份有限公司 | PDC drill bit and combined drill |
| CN109555488A (en) * | 2019-01-15 | 2019-04-02 | 济源华新石油机械有限公司 | Spherical spiral wing stabilizer |
| CN113882805A (en) * | 2021-08-31 | 2022-01-04 | 中国石油天然气集团有限公司 | Drilling tool combination capable of drilling easily-inclined and difficultly-drilled stratum quickly |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2637702Y (en) * | 2003-07-15 | 2004-09-01 | 新疆石油管理局钻井工艺研究院 | Pressure difference type drilling micro underreamer |
| CN201050304Y (en) * | 2007-05-31 | 2008-04-23 | 辽河石油勘探局 | Horizontal well diamond composite slices kickoff bit |
| CN101225736B (en) * | 2008-02-01 | 2011-05-25 | 西南石油大学 | Hydraulic double-acting drilling reamer |
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2008
- 2008-08-06 CN CN200810117784A patent/CN101644136B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102373884A (en) * | 2010-08-17 | 2012-03-14 | 淮南矿业(集团)有限责任公司 | Borehole-enlarging and bottom-enlarging drill |
| CN102373884B (en) * | 2010-08-17 | 2013-12-04 | 淮南矿业(集团)有限责任公司 | Borehole-enlarging and bottom-enlarging drill |
| CN104120978A (en) * | 2013-04-28 | 2014-10-29 | 中国石油化工股份有限公司 | PDC drill bit and combined drill |
| CN103924927A (en) * | 2014-05-14 | 2014-07-16 | 衢州市易凡设计有限公司 | Pile hole intelligent expanding method |
| CN103924927B (en) * | 2014-05-14 | 2016-02-10 | 衢州市易凡设计有限公司 | A kind of stake holes intelligence diameter enlarging method |
| CN109555488A (en) * | 2019-01-15 | 2019-04-02 | 济源华新石油机械有限公司 | Spherical spiral wing stabilizer |
| CN113882805A (en) * | 2021-08-31 | 2022-01-04 | 中国石油天然气集团有限公司 | Drilling tool combination capable of drilling easily-inclined and difficultly-drilled stratum quickly |
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| Publication number | Publication date |
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| CN101644136B (en) | 2012-09-05 |
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