CN104727760A - Spherical friction and resistance reduction stabilizer - Google Patents
Spherical friction and resistance reduction stabilizer Download PDFInfo
- Publication number
- CN104727760A CN104727760A CN201510123593.5A CN201510123593A CN104727760A CN 104727760 A CN104727760 A CN 104727760A CN 201510123593 A CN201510123593 A CN 201510123593A CN 104727760 A CN104727760 A CN 104727760A
- Authority
- CN
- China
- Prior art keywords
- spherical
- stabilizer
- jacket
- rubs
- grinding set
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003381 stabilizer Substances 0.000 title claims abstract description 39
- 239000000956 alloy Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 230000004323 axial length Effects 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 11
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 239000003208 petroleum Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1085—Wear protectors; Blast joints; Hard facing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to the technical field of petroleum drilling equipment, and particularly relates to a spherical friction and resistance reduction stabilizer. The spherical friction and resistance reduction stabilizer comprises a body. The body is sequentially sleeved with a lower grinding sleeve, double spherical jackets and an upper grinding sleeve from bottom to top. The lower grinding sleeve and the upper grinding sleeve are fixedly arranged on the body in a sleeving mode. The double spherical jackets are movably arranged on the body in a sleeving mode. The outer surfaces of the double spherical jackets are provided with a plurality of spherical centralizing edges. The spherical friction and resistance reduction stabilizer is simple in structure and reliable in performance, the effective contact area of the stabilizer and a well wall is reduced through the spherical centralizing edges, the sliding frictional force is lowered, the rotatable double spherical jackets can further replace the rotating friction between a traditional stabilizer and the well wall through the peripheral rotating friction to a certain degree, the torque generated in the drilling process can be lowered, and the working efficiency of pulling out of a hole, drilling down and drilling work is improved.
Description
Technical field
The invention belongs to oil-well drilling equipment technical field, be specifically related to a kind of spherically fall the drag reduction stabilizer that rubs.
Background technology
In oil drilling, frictional resistance is present in processes such as making a trip, creep into all the time, can by optimizing drilling assembly and improving the methods such as property of drilling fluid to reach the object reducing frictional resistance.
Optimizing drilling assembly adopts increase conventional stabilisers (also claiming centralizer) to reduce the contact area of drill string and the borehole wall usually, thus reduces frictional resistance.Make a trip, in drilling process, be sliding friction, and the borehole wall be coarse between the centering edge of conventional stabilisers and the borehole wall, frictional resistance is still very large, and rig and drill string load are still comparatively large, and especially in horizontal well and extended reach well, this phenomenon is more obvious.
For this problem, patent " a kind of drag reduction falls and turns round double-acting stabilizer " (patent No.: ZL200920079144.5) proposes solution, this stabilizer body adopts split type, overcoat is arranged between two sections of bodies, overcoat is axially distributed with roller, and roller is installed on the coat by bearing pin.The advantage of this stabilizer is the sliding friction rotational slide friction of stabilizer and the borehole wall being converted into overcoat and body, the sliding axially to rub of stabilizer and the borehole wall is converted into the rolling friction of overcoat upper roller and the borehole wall, reaches the frictional resistance reducing whole drill string and the borehole wall.The shortcoming of this stabilizer is that structure is comparatively complicated, Structural Design Requirement is met by the strength factor of sacrificing stabilizer body, moreover when down-hole is complicated and changeable, overcoat directly weares and teares with stabilizer bulk material, easily occurs the seriously down-hole accident such as drilling tool fracture under alternating stresses effect; Because formation lithology is different, the contact condition of overcoat upper roller and the borehole wall is also different, roller in drill string sliding process is very easily caused to there will not be rolling friction relative to the borehole wall, remain sliding friction, moreover roller pin axle subjects larger load, also easily cause the fracture of bearing pin, roller falls into shaft bottom, thus causes the complete accident in down-hole that bit freezing is even larger.
Summary of the invention
The object of the invention is to overcome between the centering edge of conventional stabilisers and the borehole wall is sliding friction, and the borehole wall is coarse, the problem that frictional resistance is very large.
For this reason, the invention provides and a kind of spherically fall the drag reduction stabilizer that rubs, comprise body, described external is from bottom to top set with lower grinding set, two spherical jacket, upper grinding set successively, described lower grinding set and upper grinding set fixed cover are on body, two spherical jacket movable set, on body, described two spherical jacket external surfaces has multiple spherical centering edge.
The external surface of described two spherical jacket is provided with helicla flute.
Spherical centering edge on described two spherical jacket external surfaces has two, and helicla flute is greater than the distance between two spherical centering edges around the axial length that two spherical jacket external surface circles.
The two position of spherical jacket of described body fits and the sphere of the spherical centering edge of two spherical jacket all to be inlayed or welding-on has carbide alloy.
Described upper grinding set and lower grinding set are all sleeved on body, and are fixed by Dogbolt.
Described body is provided with the projection of multiple tracks projection, described multiple tracks projection circumference is distributed in position body corresponding to lower grinding set lower surface, and lower grinding set lower surface is provided with multiple groove, and described groove and projection one_to_one corresponding are arranged.
Described projection and groove are three, distribute in the mode that hoop is uniform.
Beneficial effect of the present invention:
1, simple, the dependable performance of structure of the present invention, wherein body adopts monolithic, is provided with carbide alloy, both ensure that bulk strength, in turn ensure that the abrasion resistance of body in the middle part of body.
2, spherical jacket of the present invention adopts two spherical, and is provided with helicla flute, both ensure that sufficient drilling fluid runner, and in turn ensure that between stabilizer with the borehole wall effective contacts, and contact area is less, and the frictional resistance that therefore slides axially is less.
Rotating in a circumferential direction 3, between body of the present invention and two spherical jacket is rubbed and is replaced the spin friction of conventional stabilizer and the borehole wall, and moment of torsion in drilling process is reduced.
4, the present invention is uniformly distributed and is connected in drilling assembly, falls and rubs drag-reduction effect obviously, be specially adapted to horizontal well or extended reach well drilling process, solve and creep into the drilling problems such as moment of torsion is large, backing pressure serious, the frictional resistance that makes a trip is large.
5, after the present invention trips out well head, depending on degree of wear difference, replaceable accessory or directly reuse.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present invention.
Fig. 2 is projection and groove fit schematic diagram.
Description of reference numerals: 1, body; 2, upper grinding set; 3, Dogbolt; 4, two spherical jacket; 5, carbide alloy; 6, helicla flute; 7, lower grinding set; 8, projection; 9, groove.
Detailed description of the invention
The object of the invention is to overcome deficiency of the prior art, provide one to be specially adapted to horizontal well and extended reach well, simple, safe and reliable the falling of structure rubs drag reduction stabilizer.
Embodiment 1:
The present embodiment provides a kind of and spherically falls the drag reduction stabilizer that rubs, as shown in Figure 1, comprise body 1, described body 1 is outer is from bottom to top set with lower grinding set 7, two spherical jacket 4, upper grinding set 2 successively, described lower grinding set 7 and upper grinding set 2 fixed cover are on body 1, two spherical jacket 4 movable set, on body 1, described two spherical jacket 4 external surface has multiple spherical centering edge.
Making a trip, when the operation such as to creep into, this stabilizer of the present invention is concatenated in pipe string, because the spherical centering edge outside two spherical jacket 4 is more outer than general position, so the position contacted with the borehole wall can only be the spherical centering edge outside two spherical jacket 4, make a trip, to creep into etc. in process, stabilizer only has the outermost end sphere of spherical centering edge, compared to the centering edge of conventional stabilisers, effective contact area is less, the contact surface producing friction is just very little, the force of sliding friction produced is just smaller, frictional resistance reduces, be conducive to making a trip, creep into the carrying out of operation.
Embodiment 2:
On the basis of embodiment 1, the present embodiment is provided with helicla flute 6 on the external surface of two spherical jacket 4.Spherical centering edge on two spherical jacket 4 external surface has two, and helicla flute 6 is greater than the distance between two spherical centering edges around the axial length that two spherical jacket 4 external surface circles.
The setting of helicla flute 6, ensure that sufficient drilling fluid runner.Because helicla flute 6 is greater than the distance between two spherical centering edges around the axial length that two spherical jacket 4 external surface circles, so just can ensure that two spherical jacket 4 all has at least a spherical centering edge to contact with the borehole wall under circumference goes to any angle case, the setting of this length is only used to meet above-mentioned purpose, to be most preferably worth, make two spherical jacket 4 under circumference goes to any angle case, all have at least a spherical centering edge to contact this condition with the borehole wall as long as can meet, the angle of lead angle can be arranged arbitrarily.
Embodiment 3:
In the present embodiment, except the structure of embodiment 1 and embodiment 2, be set with at body 1 and two position of spherical jacket 4 and the sphere of the spherical centering edge of two spherical jacket 4 all inlay or welding-on has carbide alloy 5.
Sphere due to the spherical centering edge on stabilizer is the position contacted with the borehole wall, so the friction of this position is the most serious, tungsten carbide button 5 on sphere, carbide alloy 5 has that hardness is high, wear-resisting, intensity and a series of premium properties such as toughness is better, heat-resisting, corrosion-resistant, the infringement rubbing and bring can be reduced to a certain extent, increase the service life.
Upper grinding set 2 of the present invention and lower grinding set 7 are fixedly set in outside body 1, in the present embodiment, as shown in Figure 2, body 1 is provided with the projection 8 of multiple tracks projection, described multiple tracks projection 8 circumference is distributed in position body 1 corresponding to lower grinding set 7 lower surface, lower grinding set 7 lower surface is provided with multiple groove 9, and described groove 9 and projection 8 one_to_one corresponding are arranged.The setting of projection 8, can prevent lower grinding set, the downward play of two spherical jacket, and the corresponding matching of projection 8 and groove 9 is arranged, and lower grinding set 7 circumference is more fixed, prevents the circumference of lower grinding set from rotating.
Most preferably, projection 8 and groove 9 are all set to three, projection 8 is distributed on body 1 in the mode that hoop is uniform, and groove 9 coordinates with projection 8 and realizes it and act on.
Further, upper grinding set 2 and lower grinding set 7 are sleeved on outside body 1, and are fixed by Dogbolt 3, and the setting of Dogbolt 3 plays auxiliary effect for the structure function of projection 8 and groove 9.
In operation process, upper grinding set 2 and lower grinding set 7 are fixed, and two spherical jacket 4 is unfixing, so two spherical jacket 4 can rotate around body 1, rotating in a circumferential direction between such body 1 and two spherical jacket 4 is rubbed and is replaced the spin friction of conventional stabilizer and the borehole wall, and moment of torsion in drilling process is reduced.The position being set with two spherical jacket 4 at body 1 arranges carbide alloy 5, can reduce the friction damage between body 1 and two spherical jacket 4, increase the service life.
In sum, of the present invention thisly spherical the drag reduction stabilizer that rubs falls, structure is simple, dependable performance, spherical centering edge is utilized to reduce effective contact area of stabilizer and the borehole wall, reduce force of sliding friction, rotatable pair of spherical jacket to a certain extent, can also replace the spin friction of conventional stabilizer and the borehole wall with the friction that rotates in a circumferential direction, moment of torsion in drilling process is reduced.
The present invention is connected in drilling assembly, can be evenly arranged several, reduces the frictional resistance of drilling assembly in pit shaft, is specially adapted to horizontal well and extended reach well, solves and creeps into the drilling problems such as moment of torsion is large, backing pressure serious, the frictional resistance that makes a trip is large.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (7)
1. one kind is spherically fallen the drag reduction stabilizer that rubs, comprise body (1), it is characterized in that: described body (1) is from bottom to top set with lower grinding set (7), two spherical jacket (4), upper grinding set (2) outward successively, described lower grinding set (7) and upper grinding set (2) fixed cover are on body (1), two spherical jacket (4) movable set, on body (1), described two spherical jacket (4) external surface has multiple spherical centering edge.
2. spherically as claimed in claim 1 fall the drag reduction stabilizer that rubs, it is characterized in that: the external surface of described two spherical jacket (4) is provided with helicla flute (6).
3. spherical as claimed in claim 2 the drag reduction stabilizer that rubs falls, it is characterized in that: the spherical centering edge on described two spherical jacket (4) external surface has two, and helicla flute (6) is greater than the distance between two spherical centering edges around the axial length that two spherical jacket (4) external surface circles.
4. the drag reduction stabilizer that rubs falls in spherical as described in claim 1 or 2 or 3, it is characterized in that: the described two position of spherical jacket (4) of body (1) suit and the sphere of two spherical jacket (4) spherical centering edge are all inlayed or welding-on has carbide alloy (5).
5. spherically as claimed in claim 1 fall the drag reduction stabilizer that rubs, it is characterized in that: described upper grinding set (2) and lower grinding set (7) are sleeved on body (1), and be fixed by Dogbolt (3).
6. spherical as claimed in claim 5 the drag reduction stabilizer that rubs falls, it is characterized in that: the projection (8) described body (1) being provided with multiple tracks projection, described multiple tracks projection (8) circumference is distributed in the upper position corresponding to lower grinding set (7) lower surface of body (1), lower grinding set (7) lower surface is provided with multiple groove (9), and described groove (9) and projection (8) one_to_one corresponding are arranged.
7. spherically as claimed in claim 5 fall the drag reduction stabilizer that rubs, it is characterized in that: described projection (8) and groove (9) are three, distribute in the mode that hoop is uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510123593.5A CN104727760A (en) | 2015-03-20 | 2015-03-20 | Spherical friction and resistance reduction stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510123593.5A CN104727760A (en) | 2015-03-20 | 2015-03-20 | Spherical friction and resistance reduction stabilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104727760A true CN104727760A (en) | 2015-06-24 |
Family
ID=53452102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510123593.5A Pending CN104727760A (en) | 2015-03-20 | 2015-03-20 | Spherical friction and resistance reduction stabilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104727760A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401479A (en) * | 2016-11-25 | 2017-02-15 | 西南石油大学 | Friction reducing and resistance lowering tool |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201306127Y (en) * | 2008-11-10 | 2009-09-09 | 郑文光 | Double curved surface protective sucker rod coupling |
| CN201351463Y (en) * | 2009-02-11 | 2009-11-25 | 成都恩承油气有限公司 | Integral drag-reduction casing centralizer |
| CN201433724Y (en) * | 2009-04-30 | 2010-03-31 | 中国石油集团川庆钻探工程有限公司钻采工艺技术研究院 | Drilling tool stabilizer suitable for gas drilling horizontal well |
| CN201851036U (en) * | 2010-11-21 | 2011-06-01 | 中国石油集团西部钻探工程有限公司 | Antifriction and resistance-diminishing centralizing short piece |
| CN103912223A (en) * | 2014-04-12 | 2014-07-09 | 山东陆海石油装备有限公司 | Swivel bearing type drag reduction tool |
| US20140238659A1 (en) * | 2013-02-28 | 2014-08-28 | Guy Wheater | Articulated Wireline Hole Finder |
| CN204571871U (en) * | 2015-03-20 | 2015-08-19 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | One is spherical falls the drag reduction stabilizer that rubs |
-
2015
- 2015-03-20 CN CN201510123593.5A patent/CN104727760A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201306127Y (en) * | 2008-11-10 | 2009-09-09 | 郑文光 | Double curved surface protective sucker rod coupling |
| CN201351463Y (en) * | 2009-02-11 | 2009-11-25 | 成都恩承油气有限公司 | Integral drag-reduction casing centralizer |
| CN201433724Y (en) * | 2009-04-30 | 2010-03-31 | 中国石油集团川庆钻探工程有限公司钻采工艺技术研究院 | Drilling tool stabilizer suitable for gas drilling horizontal well |
| CN201851036U (en) * | 2010-11-21 | 2011-06-01 | 中国石油集团西部钻探工程有限公司 | Antifriction and resistance-diminishing centralizing short piece |
| US20140238659A1 (en) * | 2013-02-28 | 2014-08-28 | Guy Wheater | Articulated Wireline Hole Finder |
| CN103912223A (en) * | 2014-04-12 | 2014-07-09 | 山东陆海石油装备有限公司 | Swivel bearing type drag reduction tool |
| CN204571871U (en) * | 2015-03-20 | 2015-08-19 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | One is spherical falls the drag reduction stabilizer that rubs |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401479A (en) * | 2016-11-25 | 2017-02-15 | 西南石油大学 | Friction reducing and resistance lowering tool |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150624 |
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| RJ01 | Rejection of invention patent application after publication |