CN106639907A - Connecting structure of steel joint and aluminum alloy drilling rod pipe body - Google Patents
Connecting structure of steel joint and aluminum alloy drilling rod pipe body Download PDFInfo
- Publication number
- CN106639907A CN106639907A CN201510735649.2A CN201510735649A CN106639907A CN 106639907 A CN106639907 A CN 106639907A CN 201510735649 A CN201510735649 A CN 201510735649A CN 106639907 A CN106639907 A CN 106639907A
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- China
- Prior art keywords
- steel joint
- face
- aluminium
- pipe body
- aluminium alloy
- 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.)
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Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 128
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 111
- 239000010959 steel Substances 0.000 title claims abstract description 111
- 238000005553 drilling Methods 0.000 title abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 60
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 6
- 210000002445 nipple Anatomy 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 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
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
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)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The invention discloses a connecting structure of a steel joint and an aluminum alloy drilling rod pipe body. The connecting structure of the steel joint and the aluminum alloy drilling rod pipe body comprises an aluminum alloy pipe body external thread, an aluminum alloy pipe body sealing end face, an aluminum alloy pipe body end face shoulder, a steel joint internal thread, a steel joint sealing end face and a steel joint end face shoulder. The aluminum alloy pipe body sealing end face is connected to the end of the aluminum alloy pipe body external thread; the aluminum alloy pipe body end face shoulder is connected to the end of the aluminum alloy pipe body sealing end face; the steel joint internal thread is connected with the aluminum alloy pipe body external thread; the steel joint sealing end face is connected to the end of the steel joint internal thread; the steel joint end face shoulder is connected to the end of the steel joint sealing end face; and the steel joint sealing end face is connected between the steel joint internal thread and the steel joint end face shoulder. The aluminum alloy pipe body sealing end face and the steel joint sealing end face each are a conical sealing face and are cooperated with each other, and the aluminum alloy pipe body end face shoulder and the steel joint end face shoulder form sealing connection.
Description
Technical field
The present invention relates to the aluminium drill pipe used during oil-gas exploration and development, in particular to a kind of aluminium drill pipe of steel joint, more particularly to the attachment structure of steel joint and aluminium alloy drill pipe body.
Technical background
Aluminium drill pipe is divided to two kinds of steel joint aluminium drill pipe and type all-aluminum alloy drill stem, and in the processing technology of steel joint aluminium drill pipe, steel joint is usually attached with aluminium alloy drill pipe body by the way of being threadedly coupled.Due to aluminium drill pipe in use, not only to bear pulling force, simultaneously drill pipe bore is also the circulation canal of drilling fluid, therefore, threaded connection will not only ensure that bonding strength is not less than the bonding strength of body, and require that threaded connection will have enough sealing properties, to ensure that drilling rod interior or exterior space can bear enough pressure differentials.Meanwhile, being threadedly coupled than being threaded with higher break-out torque between steel joint between aluminium alloy drill pipe body and joint, to guarantee during drilling rod use, being threadedly coupled between aluminium alloy body and steel joint do not occur shackle.And current, poor sealing performance between existing aluminium alloy body and steel joint, in addition aluminium alloy body and steel joint also have that bonding strength is low.
The content of the invention
The present invention is intended to provide the attachment structure of a kind of steel joint and aluminium alloy drill pipe body, to solve the problems, such as poor sealing performance between existing aluminium alloy body and steel joint.Additionally, the present invention will also solve the problems, such as that aluminium alloy body is low with steel joint bonding strength.
For this purpose, the present invention provides the attachment structure of a kind of steel joint and aluminium alloy drill pipe body, the steel joint includes with the attachment structure of aluminium alloy drill pipe body：Aluminium-alloy pipe extracorporeal thread, is arranged on the aluminium alloy drill pipe body；Aluminium alloy body seal face, is arranged on the aluminium alloy drill pipe body and is connected to the end of the aluminium-alloy pipe extracorporeal thread；Aluminium-alloy pipe body end face shoulder, is arranged on the aluminium alloy drill pipe body and is connected to the end of the aluminium alloy body seal face, and the aluminium alloy body seal face is connected between the aluminium-alloy pipe extracorporeal thread and the aluminium-alloy pipe body end face shoulder；Steel joint internal thread, is arranged on the steel joint and is spirally connected with the aluminium-alloy pipe extracorporeal thread；Steel joint sealing end face, is arranged on the steel joint and is connected to the end of the steel joint internal thread；Steel joint end face shoulder, is arranged on the steel joint and is connected to the end of the steel joint sealing end face, and the steel joint sealing end face is connected between the steel joint internal thread and the steel joint end face shoulder；The aluminium alloy body seal face and the steel joint sealing end face are the conical seal (contact) face for cooperating, and the aluminium-alloy pipe body end face shoulder is formed with the steel joint end face shoulder and is tightly connected.
Further, the taper of the aluminium alloy body seal face is 1: 8.
Further, the length of the aluminium alloy body seal face is 8mm.
Further the aluminium alloy body seal face and the steel joint sealing end face are interference fit, and the aluminium-alloy pipe body end face shoulder forms interference fit with the steel joint end face shoulder.
Further, the aluminium-alloy pipe extracorporeal thread is hook screw thread.
Further, the hook screw thread includes：Contact surface and spigot surface are carried, the carrying contact surface is 2 to 5 ° with the angle of the body normal of the aluminium alloy drill pipe body, and the spigot surface is 8 to 12 ° with the angle of the body normal.
Further, the carrying contact surface and the angle of the body normal of the aluminium alloy drill pipe body are 3 °, and the spigot surface is 10 ° with the angle of the body normal
Further, the attachment structure of the steel joint and aluminium alloy drill pipe body hot charging in the following way：First the aluminium-alloy pipe extracorporeal thread is heated to into 200 ± 10 DEG C, is incubated 30 minutes, then assembled with the aluminium-alloy pipe extracorporeal thread.
Present invention employs double sealing structure, one is the sealing structure between aluminium alloy body seal face and the steel joint sealing end face, two is the sealing structure that aluminium-alloy pipe body end face shoulder is formed with the steel joint end face shoulder, by the sealing of the two different parts and different angles, make sealing surface and circular bead surface produce sufficiently large contact, realize high sealing performance.
Further, the loading end of aluminium-alloy pipe extracorporeal thread is designed using hook-shape structure, the structure design increased the stress of threaded connection and forward face, improve the carrying direction of stress, make threaded connection that there is higher bonding strength, elastic elongation amount of the nipple during tension is reduced, contributes to the sealing of sealing surface and circular bead surface.Additionally, the screw thread takes the spigot surface of wide-angle, and it is more smooth during upper button, thread alternating and the thread gluing of screw thread are not susceptible to, the engagement process enabled aluminum alloy between body and steel joint is safer, efficiently.
Description of the drawings
Fig. 1 is the overall structure diagram of the steel joint according to the embodiment of the present invention and the attachment structure of aluminium alloy drill pipe body；
Fig. 2 is the structure of the amplification in Fig. 1 at A；
Fig. 3 is the structure of the amplification in Fig. 1 at B.
Drawing reference numeral explanation：
1st, aluminium-alloy pipe extracorporeal thread 2, steel joint internal thread 3, aluminium-alloy pipe body end face shoulder 4, steel joint end face shoulder 5, aluminium alloy body seal face 6, steel joint sealing end face 7, carrying contact surface 8, spigot surface 9, carrying contact surface 10, spigot surface.
Specific embodiment
In order to be more clearly understood to the technical characteristic of the present invention, purpose and effect, now control illustrates the specific embodiment of the present invention.
As shown in figure 1, the steel joint includes with the attachment structure of aluminium alloy drill pipe body：
Aluminium-alloy pipe extracorporeal thread 1, is arranged on the aluminium alloy drill pipe body；Aluminium alloy body seal face 5, is arranged on the aluminium alloy drill pipe body and is connected to the end (right-hand member) of the aluminium-alloy pipe extracorporeal thread 1；Aluminium-alloy pipe body end face shoulder 3, the end (right-hand member) of the aluminium alloy body seal face 5 is arranged on the aluminium alloy drill pipe body and is connected to, the aluminium alloy body seal face 5 is connected between the aluminium-alloy pipe extracorporeal thread 1 and the aluminium-alloy pipe body end face shoulder 3；Steel joint internal thread 2, is arranged on the steel joint and is spirally connected with the aluminium-alloy pipe extracorporeal thread 1；Steel joint sealing end face 6, is arranged on the steel joint and is connected to the end (right-hand member) of the steel joint internal thread 2；Steel joint end face shoulder 4, is arranged on the steel joint and is connected to the end (right-hand member) of the steel joint sealing end face 6, and the steel joint sealing end face 6 is connected between the steel joint internal thread 2 and the steel joint end face shoulder 4；The aluminium alloy body seal face 5 and the steel joint sealing end face 6 are the conical seal (contact) face that cooperates, and the aluminium-alloy pipe body end face shoulder 3 is formed with the steel joint end face shoulder 4 and is tightly connected.
Aluminium-alloy pipe body end face shoulder 3, is arranged on the end of the aluminium alloy drill pipe body, is the end face of aluminium alloy drill pipe body, with the angle of seal face 5 up to more than 60 degree, even up to 90 degree；Steel joint end face shoulder 4, is arranged on the end of the steel joint, is the inner step of steel joint, with the angle of steel joint sealing end face 6 up to more than 60 degree, even up to 90 degree.Present invention employs double sealing structure, one is the sealing structure between aluminium alloy body seal face and the steel joint sealing end face, two is the sealing structure that aluminium-alloy pipe body end face shoulder is formed with the steel joint end face shoulder, by the sealing of the two different parts and different angles, make sealing surface and circular bead surface produce sufficiently large contact, realize high sealing performance.Especially when each end face shoulder 3 reaches 90 degree or so with the angle of each seal face, the sealing in the mutually perpendicular direction in seal face direction and circular bead surface direction is defined, not only increase the series of sealing, and increased the direction of sealing.In addition, aluminium-alloy pipe body end face shoulder 3 is formed while being tightly connected with the steel joint end face shoulder 4, yet forms both increases the effect of the connection moment of torsion between aluminium alloy drill pipe body and steel joint, greatly increases screw thread break-out torque, improves concatenation ability.
Further, the taper of the aluminium alloy body seal face is 1: 8.This taper, can increase the length of screw thread in the case where wall thickness is constant, increase the engagement tooth number of effective thread, and from face the sealing property and bonding strength of the threaded connection after assembling are improved.
Further, the length of the aluminium alloy body seal face is 8mm.Primary seal between steel joint and aluminium alloy drill pipe body is contact sealing of the face for adopting with face, and the length of seal section is too short, and very little, sealing effectiveness is bad for sealing contact surface；If the length of seal section is oversize, the contact effect of sealing contact surface can be also affected, cause sealing property to be deteriorated.Length using 8mm be the result that drawn after structure optimization, the length is engaged for 1: 8 with the taper of aluminium alloy body seal face, realizes and preferably combined of both sealing angle and seal length.
Further the aluminium alloy body seal face and the steel joint sealing end face are interference fit, the aluminium-alloy pipe body end face shoulder forms interference fit with the steel joint end face shoulder, greatly increase screw thread break-out torque, and the contact stress of nipple sealing contact surface is strengthened, realize the high-intensity sealing of nipple.
Further, as shown in Fig. 2 aluminium-alloy pipe extracorporeal thread 1 is hook screw thread, as shown in figure 3, steel joint internal thread 2 is hook screw thread, steel joint internal thread 2 cooperates with aluminium-alloy pipe extracorporeal thread 1, and hook screw thread can provide the bearing capacity of screw thread cooperation.There is aluminium-alloy pipe extracorporeal thread 1 hook-type to carry contact surface 7 and spigot surface 8, and there is steel joint internal thread 2 hook-type to carry contact surface 9 and spigot surface 10.The carrying contact surface is 2 to 5 ° with the angle α of the body normal of the aluminium alloy drill pipe body, and the spigot surface is 8 to 12 ° with the angle of the body normal, and body normal is vertical with the axis of aluminium alloy drill pipe body.Hook-type carries contact surface 7 and hook-type carries contact surface 9 after engagement, can effectively increase contact surface, improves contact stress direction, increases the tensile strength of joint, resists the elongation strain amount of joint.
It is preferred that the carrying contact surface 7 and the angle of the body normal of the aluminium alloy drill pipe body are 3 °, the spigot surface 8 is 10 ° with the angle of the body normal.The angle one of spigot surface is the smooth of impact importing, and two is the transverse tooth thickness for affecting screw thread, it is often more important that, different angles cause stress intensity of the flank under identical outer load different.This angle is also the result drawn by structural dimension optimization.
Further, the attachment structure of the steel joint and aluminium alloy drill pipe body hot charging in the following way：First the aluminium-alloy pipe extracorporeal thread is heated to into 200 ± 10 DEG C, is incubated 30 minutes, then assembled with the aluminium-alloy pipe extracorporeal thread.Using the expanded by heating attribute of Steel material, realize that the gap in assembling process coordinates or slight interference coordinates.When gradually air cooling is to normal temperature for the temperature of steel joint, because the volume of steel joint bounces back, screw thread hook-type loading end, the cooperation between conical surface seal face and torque shoulder is set to realize interference fit, not only greatly increase screw thread break-out torque, and connection and the sealing property of nipple are effectively strengthened, realize the high switching performance and seal pressure of nipple.
Schematically specific embodiment of the invention is the foregoing is only, the scope of the present invention is not limited to.Each part for the present invention can be mutually combined under conditions of not conflicting, any those skilled in the art, and done equivalent variations and modification, all should belong to the scope of protection of the invention on the premise of the design without departing from the present invention and principle.
Claims (8)
1. the attachment structure of a kind of steel joint and aluminium alloy drill pipe body, it is characterised in that the steel joint includes with the attachment structure of aluminium alloy drill pipe body：
Aluminium-alloy pipe extracorporeal thread, is arranged on the aluminium alloy drill pipe body；
Aluminium alloy body seal face, is arranged on the aluminium alloy drill pipe body and is connected to the end of the aluminium-alloy pipe extracorporeal thread；
Aluminium-alloy pipe body end face shoulder, is arranged on the aluminium alloy drill pipe body and is connected to the end of the aluminium alloy body seal face, and the aluminium alloy body seal face is connected between the aluminium-alloy pipe extracorporeal thread and the aluminium-alloy pipe body end face shoulder；
Steel joint internal thread, is arranged on the steel joint and is spirally connected with the aluminium-alloy pipe extracorporeal thread；
Steel joint sealing end face, is arranged on the steel joint and is connected to the end of the steel joint internal thread；
Steel joint end face shoulder, is arranged on the steel joint and is connected to the end of the steel joint sealing end face, and the steel joint sealing end face is connected between the steel joint internal thread and the steel joint end face shoulder；
The aluminium alloy body seal face and the steel joint sealing end face are the conical seal (contact) face for cooperating, and the aluminium-alloy pipe body end face shoulder is formed with the steel joint end face shoulder and is tightly connected.
2. the attachment structure of steel joint as claimed in claim 1 and aluminium alloy drill pipe body, it is characterised in that the taper of the aluminium alloy body seal face is 1: 8.
3. the attachment structure of steel joint as claimed in claim 1 and aluminium alloy drill pipe body, it is characterised in that the length of the aluminium alloy body seal face is 8mm.
4. the attachment structure of steel joint as claimed in claim 1 and aluminium alloy drill pipe body, it is characterized in that, the aluminium alloy body seal face is interference fit with the steel joint sealing end face, and the aluminium-alloy pipe body end face shoulder forms interference fit with the steel joint end face shoulder.
5. the attachment structure of steel joint as claimed in claim 1 and aluminium alloy drill pipe body, it is characterised in that the aluminium-alloy pipe extracorporeal thread is hook screw thread.
6. the attachment structure of steel joint as claimed in claim 5 and aluminium alloy drill pipe body, it is characterised in that the hook screw thread includes：Contact surface and spigot surface are carried, the carrying contact surface is 2 to 5 ° with the angle of the body normal of the aluminium alloy drill pipe body, and the spigot surface is 8 to 12 ° with the angle of the body normal.
7. the attachment structure of steel joint as claimed in claim 6 and aluminium alloy drill pipe body, it is characterised in that the carrying contact surface is 3 ° with the angle of the body normal of the aluminium alloy drill pipe body, and the spigot surface is 10 ° with the angle of the body normal.
8. the attachment structure of the steel joint as any one of claim 1 to 7 and aluminium alloy drill pipe body, it is characterised in that the attachment structure of the steel joint and aluminium alloy drill pipe body hot charging in the following way：First the aluminium-alloy pipe extracorporeal thread is heated to into 200 ± 10 DEG C, is incubated 30 minutes, then assembled with the aluminium-alloy pipe extracorporeal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510735649.2A CN106639907A (en) | 2015-11-03 | 2015-11-03 | Connecting structure of steel joint and aluminum alloy drilling rod pipe body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510735649.2A CN106639907A (en) | 2015-11-03 | 2015-11-03 | Connecting structure of steel joint and aluminum alloy drilling rod pipe body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106639907A true CN106639907A (en) | 2017-05-10 |
Family
ID=58810106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510735649.2A Withdrawn CN106639907A (en) | 2015-11-03 | 2015-11-03 | Connecting structure of steel joint and aluminum alloy drilling rod pipe body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106639907A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108460229A (en) * | 2018-03-21 | 2018-08-28 | 武汉理工大学 | The method of adjustment of continuous deck structural bridge drag-line internal force |
-
2015
- 2015-11-03 CN CN201510735649.2A patent/CN106639907A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108460229A (en) * | 2018-03-21 | 2018-08-28 | 武汉理工大学 | The method of adjustment of continuous deck structural bridge drag-line internal force |
| CN108460229B (en) * | 2018-03-21 | 2020-08-25 | 武汉理工大学 | Method for adjusting internal force of continuous bridge deck structure bridge guy cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170510 |