CN101566052B - Pipe expander for spherical corrugated pipe - Google Patents
Pipe expander for spherical corrugated pipe Download PDFInfo
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- CN101566052B CN101566052B CN2008101049541A CN200810104954A CN101566052B CN 101566052 B CN101566052 B CN 101566052B CN 2008101049541 A CN2008101049541 A CN 2008101049541A CN 200810104954 A CN200810104954 A CN 200810104954A CN 101566052 B CN101566052 B CN 101566052B
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Abstract
The invention provides a pipe expander for a spherical corrugated pipe, which relates to the field of oil drilling. The pipe expander comprises a roller body, a roller shaft and a pipe expander sphere, wherein the lower end face of the roller shaft is a tapered plane; a cylindrical convex shaft perpendicular to the lower end face is arranged downwardly on the lower end face; the convex shaft is provided with a through hole along the central axial line of the convex shaft; the pipe expander sphere is provided with a through hole along the central axial line of the pipe expander sphere; the convex shaft is inserted into the through hole of the pipe expander sphere from the upper end; a dowel is inserted into the through hole of the convex shaft from the lower end of the through hole of the pipe expander sphere; the pipe expander sphere is locked tightly onto the roller shaft through build-up welding; the lower end face of the roller body and the upper end face of the roller shaft are adhered with each other and are welded and fixed together; and the horizontal distance between the center of the pipe expander sphere and the central axial line of the roller body is more than 0 mm to form an eccentric structure. The pipe expander can trim the corrugated pipe to obtain reasonable roundness and surface smoothness under the condition of a lower torque; and simultaneously a structure ofa bearing part greatly improves the strength of the pipe expander so as to ensure the safety in underground construction.
Description
Technical field
The tube expander that the present invention relates to adopt in the field of oil drilling, saying so further relates to a kind of spherical tube expander that is applied to inflatable metal bellows.
Background technology
As everyone knows, the complicated well section of metal bellows packing technology has significant effect at aspects such as oil drilling, completion and well workovers, and has obtained promoting the use widely.This techniques make use plastic deformation of metal, with large diameter pipe through the rolling less bellows of external diameter that becomes, be lowered into use the well section after; Utilize waterpower and mechanical force with its distending to the pipe state; So that borehole diameter remains unchanged, simplified the oil well casing programme thus greatly, improved bit speed; Reduced drilling cost; Simultaneously solve the wellbore stability problem of complicated well section also simple and effectively, even can realize the single borehole size drilling well and the single casing size completion of deep-well, thereby can bore darker straight well and extended reach well.
The finishing of bellows ovality is very crucial in the complicated well section of metal bellows packing technology.Under the metal bellows lower going-into-well, under the effect of hydraulic expansion power, changed to circle by corrugated, because the influence of metal residues distortion, bellows still has certain ovality and surface irregularity after by hydraulic expansion, needs repair with the bellows shaping tool.
Field of oil drilling uses tube expander to be mainly used in the finishing to damaged sleeve pipe at present; Like the disclosed ball-type tube expander of Chinese patent ZL98248355.4; Continuous tube expander is used in the disclosed workover operation of Chinese patent ZL200320105440.0; The disclosed tube expander of Chinese patent ZL200520134117.5, Chinese patent ZL200420031229.3 provides a kind of multistage tube expander of ball-type that Eccentric casing roller that oil well casing repairs and Chinese patent ZL03213313.8 provide etc. that is used for.
Chinese patent CN 1050076A discloses a kind of spherical pipe expander, and this device comprises the drilling rod head and be angle expander element mounted thereto with its geometric longitudinal axis that the expander element is contained on the bearing of axle journal.
Because bearing is a ball bearing, therefore need open and annotate the hole that lubrication oil is used, and in order to prevent that mud from getting into bearing, the surface of the connection place of axle journal and expander element also is provided with sealing mat and obturages at the expander element.Because the restriction of ball bearing self structure, its abrasion resistance and mechanical strength can not well adapt to the requirement of probing expander technology, and its expander element is easy to come off from the ball bearing of axle journal.
Summary of the invention:
Shaping effect, increase bellows tube expander intensity and abrasion resistance in order to improve the bellows tube expander the purpose of this invention is to provide a kind of ball-type bellows tube expander that adopts thrust bearing.The bellows tube expander of this structure can be trimmed to rational circularity and surface finish with bellows under less torque conditions; The structure of bearing portions makes tube expander intensity and abrasion resistance be greatly improved simultaneously; To guarantee the downhole safety construction; The tube expander processing technology of this structure is simple simultaneously, is suitable for applying.
A kind of spherical bellows tube expander of the present invention comprises roller body, roller shaft and tube expander spheroid.Wherein roller body is one the tubular structure of bottom face to be arranged, and its internal chamber wall is provided with drill rod thread, so that be connected with drilling rod.The same central axis of roller body and roller shaft, its bottom face fits together with the upper surface of roller shaft and connects through built-up welding.Said roller shaft lower surface is a tapered plane, and the axis angle of itself and roller shaft is preferably 15～50 °.Perpendicular to the roller shaft lower surface to the protruding axle that has a Cylinder shape; Have through hole along protruding axle central axis and run through whole roller shaft; Through hole is suitable for reading to be opened on the edge rib of roller shaft cone upper surface, fixes with the pin that guarantees to adopt welding method will insert this through hole.Said tube expander spheroid has through hole along its ball centre axis.Said protruding axle is inserted in it from the through hole upper end of tube expander spheroid, pin is inserted in the through hole of protruding axle from the through hole lower end of tube expander spheroid.In the through hole that the edge of pin ends and roller shaft and roller body binding face is fixed together through built-up welding; Thereby the tube expander spheroid is locked on the roller shaft; Protruding thus axle constitutes thrust bearing with pin, and the tube expander spheroid is limited to move vertically, but it can rotate around protruding axle.The said tube expander spheroid centre of sphere forms eccentric structure with the horizontal range between the roller body central axis greater than 0mm, and its horizontal range (eccentric distance) is preferably 1～4mm.Adopt eccentric structure can make the actual expander size of tube expander expand tube bigger, more help later creeping into than the diameter of spheroid.Promptly under the condition of small size tube expander, realize big expansion.The particular location of above-described protruding axle on the roller shaft tapered plane then can be confirmed according to the axial location of required eccentric distance, roller body, the sphere center position of tube expander spheroid.
Consider that to ensure slurry channel unobstructed, the above roller shaft is preferably a up-narrow and down-wide cone.
The above tube expander spheroid; The through hole of being opened on its ball centre axis preferably is made up of last through hole, middle through hole and lower through-hole; Wherein the aperture of middle through hole is less than the aperture of last through hole and lower through-hole; And, in the spheroid through hole, constitute upper shoulder and lower shoulder thus more than or equal to the internal diameter of protruding shaft through-hole.The internal diameter of through hole is identical with the external diameter of protruding axle on the spheroid, and in the last through hole with protruding axle insertion tube expander spheroid, the lower surface of protruding axle is against on the upper shoulder in the tube expander spheroid through hole, and through-hole wall is a matched in clearance on protruding axle outer wall and the tube expander spheroid.Said pin is made up of pin axle and lug cap.Its pin axle external diameter is identical with the through hole internal diameter of protruding axle, and the external diameter of its lug cap is equal to or less than tube expander spheroid lower through-hole internal diameter, but greater than middle through hole internal diameter in the spheroid.Insert the lower through-hole of tube expander spheroid from tube expander spheroid through hole lower end with pinning, its lug cap is stuck in lower shoulder in the through hole, and it is pinned in the through hole of the protruding axle of middle through hole insertion that passes the tube expander spheroid.This moment, pin axle outer wall was that clearance-type cooperates with protruding shaft through-hole inwall; If through-hole aperture equals protruding shaft through-hole internal diameter in said, then middle through-hole wall is that clearance-type cooperates with a pin axle outer wall; If the external diameter of lug cap equals tube expander spheroid lower through-hole internal diameter, then the lower through-hole inwall is that clearance-type cooperates with the lug cap outer wall.Be fixed in the roller shaft through hole through the built-up welding shaft end of will pinning, thereby the tube expander spheroid is locked on the roller shaft, can rotate flexibly again.
Said roller body bottom face is with preferably being provided with at least two alignment pin location on the binding face of roller shaft upper surface.Center, roller body lower surface is provided with an oblique through hole and runs through roller body inner chamber and roller shaft simultaneously.This oblique through hole is used for carrying out expand tube construction circulating fluid.The port of this oblique through hole communicates with the bottom face of roller body; Its lower port is opened on roller shaft lower surface or side; The central axis of oblique through hole does not have particular restriction with the angle of roller body central axis, as long as can make the opening of oblique through hole on roller shaft avoid the tube expander spheroid; But consider processing problems, generally be preferably 15～50 °.
Spherical bellows tube expander of the present invention; The preferred top of wherein said tube expander spheroid is whittled into the plane with the roller shaft axis normal; So that contact applying, prevent mud infiltration thrust bearing thereby be beneficial to the contact area that increases spheroid and roller shaft with the lower surface of roller shaft.
Spherical bellows tube expander of the present invention, the protruding axle root of wherein said roller shaft lower surface preferably is provided with ring-shaped base, and the upper end of through hole is provided with endless groove on the tube expander spheroid accordingly, and its internal diameter is with the ring-shaped base external diameter.Its degree of depth is stuck in the endless groove when the tube expander spheroid is enclosed within protruding axle ring-shaped base of last time with the axial length of ring-shaped base thus, and the endless groove inwall is that clearance-type cooperates with the ring-shaped base outer wall.Said ring-shaped base is got in the axle by rubbing surface from when rotation with limiting mud cooperating of endless groove, and ring-shaped base contacts end face and can transmit the active force in the expand tube process better with spheroid simultaneously.
Spherical bellows tube expander of the present invention, wherein said tube expander spheroid is preferably: outer surface of spheroid has the groove at the end of falling the ball from the ball top along the axis direction of protruding axle on spheroid, be beneficial to the mud circulation.
Spherical bellows tube expander of the present invention, the position that wherein said protruding axle, pin and tube expander spheroid contact in twos, and the equal wall of tube expander spheroid and the contacted position of roller shaft applies antifriction alloy.Preferably the bearing pin outer wall at said protruding shaft through-hole inwall and pin applies antifriction alloy.Said antifriction alloy can be selected from disclosed antifriction alloy in the prior art, is preferably carbide alloy, tungsten carbide.
Spherical bellows tube expander of the present invention has effect:
(1) tube expander spheroid and thrust bearing structure all adopt the open type slide construction, need not sealing, also need not lubrication oil, and be simple and reliable for structure; Slidingsurface at bearing applies antifriction alloy, and bearing load carrying capacity is big, surface abrasion resistance, and the life-span is long;
(2) the tube expander spheroid adopts the formula of structure, can simplify the bearing arrangement structure significantly, fixedly is connected on the roller shaft with the mode of welding behind the spheroid through bearing pin simultaneously, has strengthened the intensity of retaining mechanism greatly, has eliminated the hidden danger that the tube expander spheroid is easy to come off;
(3) tube expander of the present invention is repaired bellows after being expanded in advance by waterpower based on bellows again, and the bellows core position is without hindrance, and the tube expander spheroid need not to cover the centre;
(4) tube expander ball centre of the present invention and roller body central axis have designed eccentric distance, the obvious more and optimization of its expansion repairing effect;
(5) the tube expander sphere structure adopts the spherical structure design that has corner angle, makes finishing effect better;
(6) in the expandable bellows lower going-into-well, be lowered to this tube expander pressurization rotation behind the hydraulic expansion and be adjacent to the borehole wall until bellows, can be effectively to the expandable bellows reparation of expanding, effect is remarkable.
Description of drawings
Fig. 1 is the vertical section sketch map of spherical bellows tube expander of the present invention.
The specific embodiment:
Below in conjunction with embodiment, further specify the present invention.
Implementation step is following:
(1) be lowered to expandable bellows in the 215.9mm well, the shape of expandable bellows is the figure of eight;
(2) dropping into the copper ball sealing, suppress about 20MPa through cementing truck or slush pump.This moment, the tubular form of expandable bellows still had certain ovality and body surface irregularity;
(3) back-off pulls out of hole, and is lowered to the spherical tube expander of the present invention, pressurization, and turn on pump, rotation presses down;
(4) end face up to expandable bellows can guarantee that drilling tool passes through smoothly, proposes tube expander.
The spherical tube expander of the described the present invention of above step is as shown in Figure 1, comprises roller body 1, roller shaft 2 and tube expander spheroid 3.
Wherein said roller shaft 2 is a up-narrow and down-wide cone shape, and roller shaft 2 cone lower surfaces are a tapered plane, and its angle of inclination is 30 °.To the protruding axle 8 that has a Cylinder shape, protruding axle 8 roots are provided with ring-shaped base 10 perpendicular to the lower surface.Have the cone that a through hole runs through whole roller shaft 2, the through hole edge of opening in roller shaft cone upper surface suitable for reading along protruding 8 at central axis.
Said tube expander spheroid 3, its top is whittled into the plane with roller shaft 2 axis normal, so that contact with roller shaft 2 cone lower surfaces.Have through hole on its ball centre axis, through hole is made up of last through hole, middle through hole and lower through-hole, wherein in the aperture of through hole less than the aperture of last through hole and lower through-hole, and, in through hole, form upper shoulder 9 and lower shoulder 11 thus greater than the internal diameter of protruding shaft through-hole.Corresponding with the ring-shaped base 10 of the above protruding axle 8 root; The upper end of through hole is provided with endless groove on tube expander spheroid 3; Its internal diameter is with ring-shaped base 10 external diameters of the above protruding axle root, and its inwall is that clearance-type cooperates with ring-shaped base 10 outer walls, and its degree of depth is with the axial length of ring-shaped base.The internal diameter of through hole is identical with the external diameter of protruding axle 8 on the spheroid; Protruding axle 8 is inserted in the last through hole of tube expander spheroid 3; The ring-shaped base 10 of protruding axle 8 bottoms is stuck in the endless groove of spheroid; The lower surface of protruding axle 8 is against in tube expander spheroid 3 through holes on the upper shoulder 9, and through-hole wall is that clearance-type cooperates on protruding axle 8 outer walls and the tube expander spheroid 3.Other is provided with a pin 4, is made up of pin axle and lug cap, and its pin axle external diameter is identical with protruding axle 8 internal diameters, and the external diameter of its lug cap equals tube expander spheroid 3 lower through-hole internal diameters.With the lower through-hole of pin 4 insertion tube expander spheroids 3, its lug cap is stuck on the interior lower shoulder 11 of through hole, and the lug cap outer wall is that clearance-type cooperates with tube expander spheroid 3 lower through-hole inwalls; The middle through hole that its bearing pin passes tube expander spheroid 3 inserts in the through hole of protruding axle, and the pin axle is that clearance-type cooperates with protruding shaft through-hole inwall.And be fixed in the through hole of protruding axle 8, thereby the tube expander spheroid is locked on the roller shaft through the built-up welding shaft end of will pinning.Constitute thrust bearing by protruding axle 8 and pin 4, tube expander spheroid 3 can rotate around protruding axle 8, moves vertically but limit tube expander spheroid 3.
Said roller body 1 is one the tubular structure of bottom face to be arranged, and its internal chamber wall is provided with drill rod thread 7, so that be connected with drilling rod.Roller body 1 and roller shaft 2 same central axis.Its bottom face fits together with the upper surface of roller shaft 3 and connects through built-up welding, and binding face is provided with two alignment pins, 5 location.Roller body 1 bottom face center is provided with the cone that an oblique through hole 6 runs through roller body 1 inner chamber and roller shaft 2 simultaneously.The port of this oblique through hole 6 communicates with the bottom face of roller body 1, and its lower port is opened on the position of the non-tube expander spheroid contact surface of roller shaft 2 lower surfaces, and the angle of the axis of oblique through hole 6 and roller body 1 axis is 45 °.This oblique through hole 6 is used for circulating fluid.
The above protruding axle 8 position on roller shaft cone lower surface makes the centre of sphere of tube expander spheroid be 3.5mm with the horizontal range (eccentric distance) that exists between the axis of roller body, forms eccentric structure.
Its external surface of the above tube expander spheroid is convenient to the mud circulation along the axis direction of protruding axle at the groove that spheroid had from the end of falling the ball, ball top.
Described spherical bellows tube expander, the bearing pin outer wall coated with tungsten carbide of wherein said protruding axle 8 through-hole walls and pin 4.
The tube expander that present embodiment provides can be trimmed to rational circularity and surface finish with bellows under less torque conditions; The structure of bearing portions makes tube expander intensity be greatly improved simultaneously; To guarantee the downhole safety construction, this structure processing technology is simple simultaneously.
Claims (12)
1. spherical bellows tube expander; Comprise roller body [1], roller shaft [2] and tube expander spheroid [3]; Wherein roller body [1] is one the tubular structure of bottom face to be arranged, and its internal chamber wall is provided with drill rod thread [7], so that be connected with drilling rod; It is characterized in that: roller body [1] and the same central axis of roller shaft [2], the upper surface of the same roller shaft of its bottom face [2] fits together and connects through built-up welding; Said roller shaft [2] lower surface is a tapered plane,, has through hole along protruding axle [8] central axis and runs through whole roller shaft [2] to the protruding axle [8] that has a cylindrical shape perpendicular to its lower surface, and said through hole is suitable for reading to be opened on the edge of roller shaft upper surface rib; Said tube expander spheroid [3]; Have through hole along its ball centre axis; Said protruding axle [8] is inserted in it from the through hole upper end of tube expander spheroid [3], and insert in the through hole of protruding axle [8] from the through hole lower end of tube expander spheroid [3] will pin [4], is fixed together through will pin binding face edge of [4] end and roller shaft [2] and roller body [1] of built-up welding; Thereby tube expander spheroid [3] is locked on the roller shaft [2]; Protruding thus axle [8] and pin [4] constitute thrust bearing, and tube expander spheroid [3] is limited to move vertically, but it can rotate around protruding axle [8]; Horizontal range between the same roller body of said tube expander spheroid [3] centre of sphere [1] central axis forms eccentric structure greater than 0mm.
2. spherical bellows tube expander according to claim 1 is characterized in that said roller shaft [2] is a up-narrow and down-wide cone.
3. spherical bellows tube expander according to claim 1 is characterized in that the central axis angle of said roller shaft [2] roller shaft [2] lower surface and roller shaft [2] is 15～50 °.
4. spherical bellows tube expander according to claim 1; It is characterized in that the through hole on said tube expander spheroid [3] central axis; Constitute by last through hole, middle through hole and lower through-hole; Wherein the aperture of middle through hole is less than the aperture of last through hole and lower through-hole, and more than or equal to the internal diameter of protruding axle [8] through hole, in the spheroid through hole, constitutes upper shoulder [9] and lower shoulder [11] thus; The internal diameter of through hole is identical with the external diameter of protruding axle [8] on the spheroid; Protruding axle [8] is inserted in the last through hole of tube expander spheroid [3]; The lower surface of protruding axle [8] is against on the upper shoulder [9] in tube expander spheroid [3] through hole, and it is matched in clearance that protruding axle [8] outer wall and tube expander spheroid [3] are gone up through-hole wall; Said pin [4] is made up of pin axle and lug cap, and its pin axle external diameter is identical with the through hole internal diameter of protruding axle [8], and the external diameter of its lug cap is less than or equal to tube expander spheroid [3] lower through-hole internal diameter, but greater than middle through hole internal diameter in the spheroid; To pin [4] insert through hole from the lower through-hole of tube expander spheroid [3]; Its lug cap is stuck in lower shoulder [11] in the through hole; The middle through hole that its pin axle passes tube expander spheroid [3] inserts in the through hole of protruding axle [8], and the pin axle is that clearance-type cooperates with protruding axle [8] through-hole wall.
5. spherical bellows tube expander according to claim 1 is characterized in that the binding face of the upper surface of said roller body [1] bottom face and roller shaft [2] is provided with at least two alignment pins [5] location; Roller body [1] center, lower surface is provided with an oblique through hole [6] and runs through roller body [1] inner chamber and roller shaft simultaneously, and its opening of opening on roller shaft [2] is avoided tube expander spheroid [3].
6. spherical bellows tube expander according to claim 5, the axis that it is characterized in that said oblique through hole [6] is 15～50 ° with the angle of roller body axis.
7. spherical bellows tube expander according to claim 1 is characterized in that the horizontal range between the axis of the same roller body of the centre of sphere [1] of said tube expander spheroid [3] is 1～4mm.
8. spherical bellows tube expander according to claim 2 is characterized in that said tube expander spheroid [3] top is whittled into the plane with protruding axle [8] axis normal, so that contact applying with the lower surface of cone.
9. spherical bellows tube expander according to claim 1; The protruding axle root that it is characterized in that said roller shaft [2] lower surface is provided with ring-shaped base [10]; Upward be provided with endless groove in the upper end of through hole at tube expander spheroid [3] accordingly, its internal diameter is with the ring-shaped base external diameter; Its degree of depth is with the axial length of ring-shaped base, is stuck in the endless groove when tube expander spheroid [3] is enclosed within protruding axle [8] ring-shaped base of last time [10] thus, cooperates for clearance-type between said endless groove inwall and the ring-shaped base outer wall.
10. spherical bellows tube expander according to claim 1, it is characterized in that said tube expander spheroid [3] external surface along the axis direction of protruding axle [8] on the spheroid evenly, strip projected parts rib and strip depression at the bottom of pushing up ball from ball distribute alternately.
11. spherical bellows tube expander according to claim 1 is characterized in that the position that said protruding axle [8], pin [4] and tube expander spheroid [3] contact in twos, and the equal wall of tube expander spheroid and the contacted position of roller shaft applies antifriction alloy.
12. spherical bellows tube expander according to claim 11 is characterized in that said antifriction alloy is carbide alloy or tungsten carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101049541A CN101566052B (en) | 2008-04-25 | 2008-04-25 | Pipe expander for spherical corrugated pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101049541A CN101566052B (en) | 2008-04-25 | 2008-04-25 | Pipe expander for spherical corrugated pipe |
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| CN101566052A CN101566052A (en) | 2009-10-28 |
| CN101566052B true CN101566052B (en) | 2012-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101049541A Active CN101566052B (en) | 2008-04-25 | 2008-04-25 | Pipe expander for spherical corrugated pipe |
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| CN113006725B (en) * | 2021-04-19 | 2022-08-26 | 东北石油大学 | Rolling shaping mechanism and sleeve shaping tool |
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| CN2347694Y (en) * | 1998-11-10 | 1999-11-10 | 刘鸿一 | Ball tube expander |
| CN2845951Y (en) * | 2005-11-29 | 2006-12-13 | 张国荣 | Tube expansion device |
| US7258165B1 (en) * | 2005-01-15 | 2007-08-21 | Williams Donald L | Hole opener and drillable casing guide and methods of use |
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2008
- 2008-04-25 CN CN2008101049541A patent/CN101566052B/en active Active
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| US2237538A (en) * | 1939-02-25 | 1941-04-08 | John A Zublin | Swedge |
| US3191677A (en) * | 1963-04-29 | 1965-06-29 | Myron M Kinley | Method and apparatus for setting liners in tubing |
| CN1050076A (en) * | 1989-09-05 | 1991-03-20 | 鞑靼国立石油工业科学研究所设计院 | Pipe expander |
| CN2347694Y (en) * | 1998-11-10 | 1999-11-10 | 刘鸿一 | Ball tube expander |
| US7258165B1 (en) * | 2005-01-15 | 2007-08-21 | Williams Donald L | Hole opener and drillable casing guide and methods of use |
| CN2845951Y (en) * | 2005-11-29 | 2006-12-13 | 张国荣 | Tube expansion device |
Non-Patent Citations (3)
| Title |
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| 《第六届石油钻井院所长会议论文集》编委会.《波纹管堵漏技术研究》.《第六届石油钻井院所长会议论文集》.石油工业出版社,2007,439-443. * |
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