CN200992957Y - Saw tooth thread connecting mechanism - Google Patents
Saw tooth thread connecting mechanism Download PDFInfo
- Publication number
- CN200992957Y CN200992957Y CN 200620166410 CN200620166410U CN200992957Y CN 200992957 Y CN200992957 Y CN 200992957Y CN 200620166410 CN200620166410 CN 200620166410 CN 200620166410 U CN200620166410 U CN 200620166410U CN 200992957 Y CN200992957 Y CN 200992957Y
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- CN
- China
- Prior art keywords
- pipe fitting
- saw shape
- internal thread
- tube piece
- male element
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a saw shape thread connection mechanism, comprising an outside thread pipe fitting and an inside thread pipe fitting, wherein the outside thread pipe fitting and the inside thread pipe fitting are connected through a saw shape thread; an angle, namely a bearing angle between the stress surface of the saw shape thread and a vertical direction is less than 3 degrees, an angle Alpha between a non stress surface and the vertical direction is 15 to 45 degrees; the middle of the inside thread pipe fitting is provided with an interval step whose head face is a plane, an inclined plane or a V-shaped groove, the terminal of the outside thread pipe fitting is a sphere cylinder, the interval step of the inside thread pipe fitting is hermetically fitted with an interference alignment of the outside thread pipe fitting sphere cylinder. The thread depth of the utility model is lower than the thread depth of a normal rope thread, correspondingly the wall thickness of the pipe is added. The middle of the inside thread pipe fitting is added with the interval step, so the pipe fitting will not be damaged by the torsion of an oversize mechanical force, the outside thread pipe fitting and the inside thread pipe fitting are transitionally matched for sealing and marking with the center and form into an integration after being screwed down, the utility model has a great effect in use.
Description
Technical field
The utility model relates to a kind of bindiny mechanism, particularly a kind of saw shape screw thread that has, described screw thread stressed bigger, the saw shape threaded connection that the tooth of the tooth height ratio regular screw threads of screw thread is short.
Background technology
Saw shape screw thread is mainly used in stressed bigger, and is single load bearing, and screw efficiency is the same with trapezoid buckle, belongs to the high efficiency screw thread.
All be threaded on petroleum oil and the sleeve pipe, major part is a round thread, and this screw thread is exactly a single load bearing, and is stressed sometimes very big, analyzes from stressed, and it not only bears very big axial force but also bigger axial tension is arranged.When pipe surpassed the limit of deformation, radial load impelled the chance of pipe deformation many, and the accident of corresponding slippage is just many.Adopt pier to forge the wall thickness that increases tube head with Technology for Heating Processing and solve the problems referred to above, but pier is forged with heat treated complicated technology and new problem can be occurred again.
The utility model content
In order to overcome defective of the prior art, the utility model provides that a kind of tooth of screw thread is short, the angle of stress surface has a saw shape threaded connection less than 90 degree, as petroleum oil, sleeve pipe and drilling rod.
To achieve these goals, the utility model provides a kind of saw shape threaded connection, comprise male element and internal thread tube piece, have corresponding saw shape screw thread on described male element and the internal thread tube piece, male element and internal thread tube piece are threaded by saw shape.
The stress surface of described saw shape screw thread and the angle of vertical direction are promptly carried angle less than 3 degree, and the angle [alpha] of non-stress face and vertical direction is between 15～45 degree.
The centre of described internal thread tube piece is provided with step at interval, the end face of step is plane, inclined-plane or V-shaped groove at interval, the end of described male element is spherical cylinder, and the spherical cylinder interference centering of the interval step of internal thread tube piece and male element is sealed and matched.
The introducing of male element for convenience, the mouth of pipe inboard, end of described internal thread tube piece is provided with the inclined plane.
The screw thread of described male element and body joint are provided with step.Realized twice sealing of male element and internal thread tube piece.
One or more teeth in described male element or the internal thread tube piece are bigger than other teeth
Advantage of the present utility model is:
1, the common round thread of the tooth height ratio of the utility model saw shape screw thread is short a lot, and tooth is short, and corresponding strength has just increased, and the wall of the short pipe comparatively speaking of tooth has just thickened.
2, the angle of the utility model stress surface has increased interactional power less than 90 degree, and endurance has increased, and intensity has increased relatively, and the effect that is threaded is better than original, has saved resource.
3, adopt saw shape to be threaded, in the middle of internal thread tube piece, set up step at interval, after having determined torsion, just can not occur because of the excessive phenomenon of turning round bad pipe fitting of machine power.
4, male element and internal thread tube piece have the interference fits of one section cylinder to do sealing and centering, so almost become one after tightening, can not only use on normal well like this, even use on horizontal well extraordinary effect are arranged also.
5, not only in the middle of the internal thread tube piece step at interval is set, step also is set on male element, owing to adopt two steps, the fatigue problem of the internal thread tube piece that former separate unit rank cause has just been reduced greatly, adopt the tapering of this saw shape screw thread little simultaneously, the height of the thread that the aspect ratio of thread is original is short half, can cutted thread on the pipe fitting that directly pier is thick, saved the operation of friction welding, reduce the problem that welding occurs, solved incompressible, counter-bending, resisted torsion strong, reduced fatigue, increased sealing.
Description of drawings
Fig. 1 is the utility model one example structure schematic diagram.
Fig. 2 is the utility model saw shape helicitic texture schematic diagram.
Fig. 3 is another example structure schematic diagram of the utility model.
Fig. 4 is the partially sealed structural representation of the utility model.
Fig. 5 is another partially sealed structural representation of the utility model.
Fig. 6 is the another partially sealed structural representation of the utility model.
Fig. 7 is the utility model partially sealed structural representation again.
The accompanying drawing sign
1-male element 2-internal thread tube piece 3-saw shape screw thread
4-is step 5-step 6-inclined plane at interval
7-V shape groove 8-inclined-plane 9-body
The specific embodiment
Below in conjunction with accompanying drawing the utility model is elaborated, but not as the qualification novel to the utility model.
As shown in Figure 1, described internal thread tube piece 2 is all screwed box cuplings in two ends, box cupling one end shown in the figure is threaded by 3 saw shapes with 1 male element, the centre of box cupling is provided with step 4 at interval, the thread head of male element 1 is spherical cylinder, be against on the step 4 of interval, between interval step surface in the middle of the box cupling and the saw shape screw thread 3 certain distance L arranged, male element 1 forms interference fit with box cupling on this segment distance of L.
It is plane, sphere and flat, inclined-plane, the sealing of V-type groove that plane cylinder, curved surface cylinder end face are adopted in the sealing of oil pipe and sleeve pipe, puts in order multi-form compound seals such as clasp type interference.The sealing of this threaded drillpipe two steps, inside pipe wall are the design of concordant connection.
As shown in Figure 2, the stress surface of described saw shape screw thread 3 and the angle of vertical direction are promptly carried angle less than 3 degree, and the angle [alpha] of non-stress face and vertical direction is between 15～45 degree.
As shown in Figure 3, described saw shape threaded connection is a drilling rod, comprise male element 1 and internal thread tube piece 2, the screw thread front end of internal thread tube piece 2 is provided with step 4 at interval, the screw thread 3 and body 9 contact positions of male element 1 are provided with step 5, make drilling rod form two sealings, first is sealed in the pipe end formation of step 5 with the internal thread tube piece 2 of male element 1, form between the interval step 4 of second end that is sealed in male element 1 and internal thread tube piece 2, be approximated to one after tightening, overcome the deficiency that former drilling rod single load bearing and big torsion occur.With Fig. 3 is example, the tooth height of saw shape screw thread is 2.5mm, the tapering of saw shape screw thread is 1: 14, per inch 4 teeth, the inclined plane horizontal length of the end mouth of pipe inside wall of described internal thread tube piece 2 is 10mm, the horizontal length that has saw shape threaded portion of internal thread tube piece 2 and male element 1 is 110mm, the outer tube diameter of internal thread tube piece is 150mm, big mouthful of end caliber of interior caliber is 133mm, and osculum one end caliber is 108, and the caliber of male element 1 is corresponding with the caliber of internal thread tube piece 2.As shown in Figure 2, the diameter R2 of the stress surface end fillet of ridge is that the diameter R1 of 0.3mm non-stress face end fillet is 0.6mm.Because the tapering of saw shape screw thread 3 is little, the height of the original drill rod thread of aspect ratio of thread is short a greater part of, and is therefore incompressible, counter-bending, resisted torsion strong.
As Fig. 4, Fig. 5, Fig. 6, shown in Figure 7, show several seal form between male element 1 and the internal thread tube piece 2.Fig. 4 is inclined-plane and spherical cylinder interference centering sealing, and the end of the male element 1 among the figure is spherical cylinder, and the end face of the interval step 4 of internal thread tube piece 2 is inclined-plane 8, and end face inclined-plane 8 forms interference with spherical cylinder and is sealed and matched; Fig. 5 is cylinder centering, interference fit end face flat seal, and the end of male element 1 is spherical cylinder among the figure, and the end face of the interval step 4 of internal thread tube piece 2 is the plane, and spherical cylinder and planar end form interference and be sealed and matched; Fig. 6 is that end face is spherical column sealed with the V-type groove, and the end of male element 1 is spherical cylinder among the figure, and the end face of the interval step 4 of internal thread tube piece 2 is the V-type groove, and V-type groove and spherical cylinder form sealing; The end of Fig. 7 male element 1 is spherical cylinder, the end face of the interval step 4 of internal thread tube piece 2 is inclined-plane 8, end face inclined-plane 8 forms interference with spherical cylinder and is sealed and matched, one or more ridges with internal thread tube piece 2 or male element 1 screw thread are a bit larger tham other ridge simultaneously, form interference fit section S than major thread tooth touching position, reach better sealing.
The degree of depth of all size internal thread tube piece 2 with male element 1 screw-in has been shown in the table 1
Table 1
The utility model is pressed metric system, and pitch is 2.5,3,4,5,6mm.By S made in Great Britain is every cun 10 teeth, 8 teeth, 6 teeth, 5 teeth, 4 teeth.
The metric system that uses of tapering is diameter taper 25,22,19/300mm.English system is 1in, 7/8in, 3/4in/ft.
The utility model can be applicable to open well, deep-well, ultradeep well, high pressure oil wells, scaled high-pressure natural gas well, horizontal well, directional well, extended reach well, high pressure Fractured Oil Well.
Claims (6)
1, a kind of saw shape threaded connection comprises male element and internal thread tube piece, it is characterized in that, has corresponding saw shape screw thread on described male element and the internal thread tube piece, and male element and internal thread tube piece are threaded by saw shape.
2, saw shape threaded connection according to claim 1 is characterized in that, the stress surface of described saw shape screw thread and the angle of vertical direction are promptly carried angle less than 3 degree, and the angle [alpha] of non-stress face and vertical direction is between 15～45 degree.
3, saw shape threaded connection according to claim 1, it is characterized in that, the centre of described internal thread tube piece is provided with step at interval, the end face of step is plane, inclined-plane or V-shaped groove at interval, the end of described male element is spherical cylinder, and the spherical cylinder interference centering of the interval step of internal thread tube piece and male element is sealed and matched.
4, saw shape threaded connection according to claim 1 is characterized in that, the mouth of pipe inboard, end of described internal thread tube piece is provided with the inclined plane.
5, the direct-connected structure of meeting sb. at the airport of saw shape screw thread according to claim 1, it is characterized in that: the screw thread pipe end and the body joint of described inside and outside pipe fitting are respectively equipped with step, reach the requirement of double seal.
6, saw shape threaded connection according to claim 1 is characterized in that: two whole circle screw threads in described male element or the internal thread tube piece reasonably increase with respect to other teeth, thereby reach the effect of sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620166410 CN200992957Y (en) | 2006-12-19 | 2006-12-19 | Saw tooth thread connecting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620166410 CN200992957Y (en) | 2006-12-19 | 2006-12-19 | Saw tooth thread connecting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200992957Y true CN200992957Y (en) | 2007-12-19 |
Family
ID=38946034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620166410 Expired - Fee Related CN200992957Y (en) | 2006-12-19 | 2006-12-19 | Saw tooth thread connecting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200992957Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015909A (en) * | 2012-12-25 | 2013-04-03 | 江苏和信石油机械有限公司 | 14-3/4 inch oversized caliber prospecting drill pipe |
| CN103292076A (en) * | 2013-06-04 | 2013-09-11 | 无锡金顶石油管材配件制造有限公司 | Petroleum pipeline with taper structures |
| CN104653123A (en) * | 2015-02-05 | 2015-05-27 | 江苏常宝钢管股份有限公司 | Coupling-free direct connecting spinning joint oil pipe |
| CN111299978A (en) * | 2020-03-20 | 2020-06-19 | 贵州合纵达钢结构有限责任公司 | Preparation method of drilling follow-up casing |
-
2006
- 2006-12-19 CN CN 200620166410 patent/CN200992957Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015909A (en) * | 2012-12-25 | 2013-04-03 | 江苏和信石油机械有限公司 | 14-3/4 inch oversized caliber prospecting drill pipe |
| CN103292076A (en) * | 2013-06-04 | 2013-09-11 | 无锡金顶石油管材配件制造有限公司 | Petroleum pipeline with taper structures |
| CN104653123A (en) * | 2015-02-05 | 2015-05-27 | 江苏常宝钢管股份有限公司 | Coupling-free direct connecting spinning joint oil pipe |
| CN111299978A (en) * | 2020-03-20 | 2020-06-19 | 贵州合纵达钢结构有限责任公司 | Preparation method of drilling follow-up casing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071219 Termination date: 20111219 |