CN102900378A - Connecting structure of steel joint and aluminium alloy drill pipe body - Google Patents
Connecting structure of steel joint and aluminium alloy drill pipe body Download PDFInfo
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- CN102900378A CN102900378A CN2012103261409A CN201210326140A CN102900378A CN 102900378 A CN102900378 A CN 102900378A CN 2012103261409 A CN2012103261409 A CN 2012103261409A CN 201210326140 A CN201210326140 A CN 201210326140A CN 102900378 A CN102900378 A CN 102900378A
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Abstract
The invention discloses a connecting structure of a steel joint and an aluminium alloy drill pipe body. The connecting structure of a steel joint and an aluminium alloy drill 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, wherein the aluminum alloy pipe body sealing end face is connected to the end part of the aluminum alloy pipe body external-thread; the aluminum alloy pipe body end-face shoulder is connected to the end part of the aluminum alloy pipe body sealing end face; the steel joint internal-thread is in threaded connection with the aluminum alloy pipe body external-thread; the steel joint sealing end face is connected to the end part of the steel joint internal-thread; the steel joint end-face shoulder is connected to the end part 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; and the aluminum alloy pipe body sealing end face and the steel joint sealing end face are mutually cooperated cone-shaped sealing surfaces, and the aluminum alloy pipe body end-face shoulder is in seal connection with the steel joint end-face shoulder.
Description
Technical field
The present invention relates to the aluminium drill pipe that uses in the oil-gas exploration and development process, in particular to a kind of aluminium drill pipe of steel joint, relate in particular to the syndeton of steel joint and aluminium alloy drill pipe body.
Background technology
Aluminium drill pipe divides two kinds on steel joint aluminium drill pipe and all aluminium alloy drilling rod, and in the processing technology of steel joint aluminium drill pipe, the steel joint usually adopts the mode that is threaded to be connected with aluminium alloy drill pipe body.Because aluminium drill pipe in use, not only want bearing tension, drill pipe bore also is the circulation canal of drilling fluid simultaneously, therefore, be threaded and guarantee that not only bonding strength is not less than the bonding strength of body, and require to be threaded to have enough sealing performancies, can bear enough pressure differentials to guarantee the drilling rod interior or exterior space.Simultaneously, being threaded than the shackle moment of torsion that is threaded higher between steel joint between aluminium alloy drill pipe body and joint, guaranteeing in the drilling rod use procedure, shackle does not occur in being threaded between aluminium alloys body and steel joint.And at present, poor sealing performance between existing aluminium alloys body and steel joint, also there are the low problem of bonding strength in aluminium alloys body and steel joint in addition.
Summary of the invention
The present invention aims to provide the syndeton of a kind of steel joint and aluminium alloy drill pipe body, to solve the problem of poor sealing performance between existing aluminium alloys body and steel joint.In addition, the present invention also will solve the low problem of aluminium alloys body and steel joint bonding strength.
For this reason, the invention provides the syndeton of a kind of steel joint and aluminium alloy drill pipe body, the syndeton of described steel joint and aluminium alloy drill pipe body comprises: the aluminium-alloy pipe extracorporeal thread is arranged on the described aluminium alloy drill pipe body; Aluminium alloys body seal face is arranged on the described aluminium alloy drill pipe body and is connected to the end of described aluminium-alloy pipe extracorporeal thread; Aluminium alloys body end face shoulder, be arranged on the described aluminium alloy drill pipe body and be connected to the end of described aluminium alloys body seal face, described aluminium alloys body seal face is connected between described aluminium-alloy pipe extracorporeal thread and the described aluminium alloys body end face shoulder; Steel joint internal thread is arranged on the described steel joint and with described aluminium-alloy pipe extracorporeal thread and is spirally connected; Steel joint sealing end face is arranged on the described steel joint and is connected to the end of described steel joint internal thread; Steel joint end face shoulder is arranged on the described steel joint and is connected to the end of described steel joint sealing end face, and described steel joint sealing end face is connected between described steel joint internal thread and the described steel joint end face shoulder; Described aluminium alloys body seal face and described steel joint sealing end face are the conical seal (contact) face that cooperatively interacts, and described aluminium alloys body end face shoulder and described steel joint end face shoulder form and be tightly connected.
Further, the tapering of described aluminium alloys body seal face is 1: 8.
Further, the length of described aluminium alloys body seal face is 8mm.
Described aluminium alloys body seal face and described steel joint sealing end face are interference fit further, and described aluminium alloys body end face shoulder and described steel joint end face shoulder form interference fit.
Further, described aluminium-alloy pipe extracorporeal thread is hook screw thread.
Further, described hook screw thread comprises: carrying contact surface and spigot surface, and the angle of the body normal of described carrying contact surface and described aluminium alloy drill pipe body is 2 to 5 °, the angle of described spigot surface and described body normal is 8 to 12 °.
Further, the angle of the body normal of described carrying contact surface and described aluminium alloy drill pipe body is 3 °, and the angle of described spigot surface and described body normal is 10 °
Further, the syndeton of described steel joint and aluminium alloy drill pipe body is hot charging in the following way: first described aluminium-alloy pipe extracorporeal thread is heated to 200 ± 10 ℃, is incubated 30 minutes, then with described aluminium-alloy pipe extracorporeal thread assembling.
The present invention has adopted double sealing structure, the one, the hermetically-sealed construction between aluminium alloys body seal face and the described steel joint sealing end face, the 2nd, the hermetically-sealed construction that aluminium alloys body end face shoulder and described steel joint end face shoulder form, sealing by these two different parts and different angles, make sealing surface and circular bead surface produce enough large contact, realize high sealing performance.
And then, the bearing surface of aluminium-alloy pipe extracorporeal thread adopts the hook-shape structure design, this structure design has increased the stress that is threaded and has forwarded face, the loading side of having improved stress to, making is threaded has higher bonding strength, reduce the elastic elongation amount of nipple in the tension process, helped the sealing of sealing surface and circular bead surface.In addition, this screw thread is taked the spigot surface of wide-angle, and is more smooth and easy in upper button process, is difficult for occuring thread alternating and the thread gluing of screw thread, makes the engagement process between aluminium alloys body and steel joint safer, efficient.
Description of drawings
Fig. 1 is the overall structure schematic diagram according to the syndeton of the steel joint of the embodiment of the invention and aluminium alloy drill pipe body;
Fig. 2 is the structure of the amplification at A place among Fig. 1;
Fig. 3 is the structure of the amplification at B place among Fig. 1.
The drawing reference numeral explanation:
1, aluminium-alloy pipe extracorporeal thread 2, steel joint internal thread 3, aluminium alloys body end face shoulder 4, steel joint end face shoulder 5, aluminium alloys body seal face 6, steel joint sealing end face 7, carrying contact surface 8, spigot surface 9, carrying contact surface 10, spigot surface
The specific embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.
As shown in Figure 1, the syndeton of described steel joint and aluminium alloy drill pipe body comprises:
Aluminium-alloy pipe extracorporeal thread 1 is arranged on the described aluminium alloy drill pipe body; Aluminium alloys body seal face 5 is arranged on the described aluminium alloy drill pipe body and is connected to the end (right-hand member) of described aluminium-alloy pipe extracorporeal thread 1; Aluminium alloys body end face shoulder 3, be arranged on the described aluminium alloy drill pipe body and be connected to the end (right-hand member) of described aluminium alloys body seal face 5, described aluminium alloys body seal face 5 is connected between described aluminium-alloy pipe extracorporeal thread 1 and the described aluminium alloys body end face shoulder 3; Steel joint internal thread 2 is arranged on the described steel joint and with described aluminium-alloy pipe extracorporeal thread 1 and is spirally connected; Steel joint sealing end face 6 is arranged on the described steel joint and is connected to the end (right-hand member) of described steel joint internal thread 2; Steel joint end face shoulder 4 is arranged on the described steel joint and is connected to the end (right-hand member) of described steel joint sealing end face 6, and described steel joint sealing end face 6 is connected between described steel joint internal thread 2 and the described steel joint end face shoulder 4; Described aluminium alloys body seal face 5 and the conical seal (contact) face of described steel joint sealing end face 6 for cooperatively interacting, described aluminium alloys body end face shoulder 3 form with described steel joint end face shoulder 4 and are tightly connected.
Aluminium alloys body end face shoulder 3 is arranged on the end of described aluminium alloy drill pipe body, is the end face of aluminium alloy drill pipe body, can reach more than 60 degree with the angle of seal face 5, even reach 90 degree; Steel joint end face shoulder 4 is arranged on the end of described steel joint, is the inner step of steel joint, can reach more than 60 degree with the angle of steel joint sealing end face 6, even reach 90 degree.The present invention has adopted double sealing structure, the one, the hermetically-sealed construction between aluminium alloys body seal face and the described steel joint sealing end face, the 2nd, the hermetically-sealed construction that aluminium alloys body end face shoulder and described steel joint end face shoulder form, sealing by these two different parts and different angles, make sealing surface and circular bead surface produce enough large contact, realize high sealing performance.Especially when the angle of each end face shoulder 3 and each seal face reaches the 90 degree left and right sides, formed the sealing on the mutually perpendicular direction of seal face direction and circular bead surface direction, not only improve the progression of sealing, and increased the direction of sealing.In addition, when aluminium alloys body end face shoulder 3 and described steel joint end face shoulder 4 form and be tightly connected, also form the effect that is connected moment of torsion that increases between aluminium alloy drill pipe body and the steel joint, screw thread shackle moment of torsion is increased greatly, improved concatenation ability.
Further, the tapering of described aluminium alloys body seal face is 1: 8.This tapering can increase the engagement tooth number of effective thread in the situation that the length of the constant increase of wall thickness screw thread, improves the sealing performance that is threaded and bonding strength after the assembling from face.
Further, the length of described aluminium alloys body seal face is 8mm.Steel joint and primary seal between the aluminium alloy drill pipe body are the faces that adopt and the sealing that contacts of face, and the length of seal section is too short, sealing contact surface very little, sealing effectiveness is bad; If the length of seal section is oversize, also can affect the contact effect of sealing contact surface, cause the sealing performance variation.The length that adopts 8mm be result by drawing after the structure optimization, this length and the tapering of aluminium alloys body seal face are to match at 1: 8, have realized sealing the better combination of angle and seal length two aspects.
Described aluminium alloys body seal face and described steel joint sealing end face are interference fit further, described aluminium alloys body end face shoulder and described steel joint end face shoulder form interference fit, screw thread shackle moment of torsion is increased greatly, and strengthened the contact stress of nipple sealing contact surface, realize the high-intensity sealing of nipple.
Further, as shown in Figure 2, aluminium-alloy pipe extracorporeal thread 1 is hook screw thread, and as shown in Figure 3, steel joint internal thread 2 is hook screw thread, and steel joint internal thread 2 cooperatively interacts with aluminium-alloy pipe extracorporeal thread 1, and hook screw thread can provide the supporting capacity of threaded engagement.Aluminium-alloy pipe extracorporeal thread 1 has hook-type carrying contact surface 7 and spigot surface 8, and steel joint internal thread 2 has hook-type carrying contact surface 9 and spigot surface 10.The angle α of the body normal of described carrying contact surface and described aluminium alloy drill pipe body is 2 to 5 °, and the angle of described spigot surface and described body normal is 8 to 12 °, and the body normal is vertical with the axis of aluminium alloy drill pipe body.Hook-type carrying contact surface 7 and hook-type carrying contact surface 9 can increase contact surface effectively after engagement, improve the contact stress direction, increase the tensile strength of joint junction, the elongation strain amount of opposing joint.
Preferably, described carrying contact surface 7 is 3 ° with the angle of the body normal of described aluminium alloy drill pipe body, and described spigot surface 8 is 10 ° with the angle of described body normal.The angle one of spigot surface be impact import smooth and easy, the 2nd, affect the transverse tooth thickness of screw thread, the more important thing is, different angles cause the stress intensity difference of flank under identical outside year.This angle also is the result who draws by structural dimension optimization.
Further, the syndeton of described steel joint and aluminium alloy drill pipe body is hot charging in the following way: first described aluminium-alloy pipe extracorporeal thread is heated to 200 ± 10 ℃, is incubated 30 minutes, then with described aluminium-alloy pipe extracorporeal thread assembling.Utilize the expanded by heating attribute of Steel material, realize that matched in clearance or the slight interference in the assembling process cooperates.In the temperature of steel joint when air cooling is to normal temperature gradually, because the volume of steel joint retraction, make cooperating between screw thread hook-type bearing surface, conical surface seal face and torque shoulder realize interference fit, screw thread shackle moment of torsion is increased greatly, and effectively strengthened the joint and seal performance of nipple, realize high switching performance and the sealing load of nipple.
The above only is the schematic specific embodiment of the present invention, is not to limit scope of the present invention.For each ingredient of the present invention can make up under the condition of not conflicting mutually, any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.
Claims (8)
1. the syndeton of a steel joint and aluminium alloy drill pipe body is characterized in that, the syndeton of described steel joint and aluminium alloy drill pipe body comprises:
The aluminium-alloy pipe extracorporeal thread is arranged on the described aluminium alloy drill pipe body;
Aluminium alloys body seal face is arranged on the described aluminium alloy drill pipe body and is connected to the end of described aluminium-alloy pipe extracorporeal thread;
Aluminium alloys body end face shoulder, be arranged on the described aluminium alloy drill pipe body and be connected to the end of described aluminium alloys body seal face, described aluminium alloys body seal face is connected between described aluminium-alloy pipe extracorporeal thread and the described aluminium alloys body end face shoulder;
Steel joint internal thread is arranged on the described steel joint and with described aluminium-alloy pipe extracorporeal thread and is spirally connected;
Steel joint sealing end face is arranged on the described steel joint and is connected to the end of described steel joint internal thread;
Steel joint end face shoulder is arranged on the described steel joint and is connected to the end of described steel joint sealing end face, and described steel joint sealing end face is connected between described steel joint internal thread and the described steel joint end face shoulder;
Described aluminium alloys body seal face and described steel joint sealing end face are the conical seal (contact) face that cooperatively interacts, and described aluminium alloys body end face shoulder and described steel joint end face shoulder form and be tightly connected.
2. the syndeton of steel joint as claimed in claim 1 and aluminium alloy drill pipe body is characterized in that, the tapering of described aluminium alloys body seal face is 1: 8.
3. the syndeton of steel joint as claimed in claim 1 and aluminium alloy drill pipe body is characterized in that, the length of described aluminium alloys body seal face is 8mm.
4. the syndeton of steel joint as claimed in claim 1 and aluminium alloy drill pipe body, it is characterized in that, described aluminium alloys body seal face and described steel joint sealing end face are interference fit, and described aluminium alloys body end face shoulder and described steel joint end face shoulder form interference fit.
5. the syndeton of steel joint as claimed in claim 1 and aluminium alloy drill pipe body is characterized in that, described aluminium-alloy pipe extracorporeal thread is hook screw thread.
6. the syndeton of steel joint as claimed in claim 5 and aluminium alloy drill pipe body, it is characterized in that, described hook screw thread comprises: carrying contact surface and spigot surface, the angle of the body normal of described carrying contact surface and described aluminium alloy drill pipe body is 2 to 5 °, and the angle of described spigot surface and described body normal is 8 to 12 °.
7. the syndeton of steel joint as claimed in claim 6 and aluminium alloy drill pipe body is characterized in that, the angle of the body normal of described carrying contact surface and described aluminium alloy drill pipe body is 3 °, and the angle of described spigot surface and described body normal is 10 °.
8. such as the syndeton of each described steel joint and aluminium alloy drill pipe body in the claim 1 to 7, it is characterized in that, the syndeton of described steel joint and aluminium alloy drill pipe body is hot charging in the following way: first described aluminium-alloy pipe extracorporeal thread is heated to 200 ± 10 ℃, be incubated 30 minutes, then with described aluminium-alloy pipe extracorporeal thread assembling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103261409A CN102900378A (en) | 2012-09-05 | 2012-09-05 | Connecting structure of steel joint and aluminium alloy drill pipe body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103261409A CN102900378A (en) | 2012-09-05 | 2012-09-05 | Connecting structure of steel joint and aluminium alloy drill pipe body |
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| CN102900378A true CN102900378A (en) | 2013-01-30 |
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| CN2012103261409A Pending CN102900378A (en) | 2012-09-05 | 2012-09-05 | Connecting structure of steel joint and aluminium alloy drill pipe body |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104108000A (en) * | 2013-12-19 | 2014-10-22 | 吉林大学 | Internal cooling system for aluminum alloy drill pipe joint hot assembling |
| CN104533311A (en) * | 2014-12-05 | 2015-04-22 | 中国石油天然气集团公司 | Connection structure for aluminum drill stem pipe and connectors |
| CN107146714A (en) * | 2017-07-03 | 2017-09-08 | 中国西电集团公司 | One kind is used to bond insulating cylinder and metal joint attachment structure and assembly method |
| US10196863B2 (en) | 2014-11-12 | 2019-02-05 | China National Petroleum Corporation | Connection structure between pipe body and steel joint of aluminum alloy drill pipe |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104108000A (en) * | 2013-12-19 | 2014-10-22 | 吉林大学 | Internal cooling system for aluminum alloy drill pipe joint hot assembling |
| CN104108000B (en) * | 2013-12-19 | 2016-10-19 | 吉林大学 | Aluminium drill pipe joint heat assembles internal cooling system |
| US10196863B2 (en) | 2014-11-12 | 2019-02-05 | China National Petroleum Corporation | Connection structure between pipe body and steel joint of aluminum alloy drill pipe |
| CN104533311A (en) * | 2014-12-05 | 2015-04-22 | 中国石油天然气集团公司 | Connection structure for aluminum drill stem pipe and connectors |
| US10036213B2 (en) | 2014-12-05 | 2018-07-31 | China National Petroleum Corporation | Connection structure between pipe body and joint of aluminum alloy drill pipe |
| CN107146714A (en) * | 2017-07-03 | 2017-09-08 | 中国西电集团公司 | One kind is used to bond insulating cylinder and metal joint attachment structure and assembly method |
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Application publication date: 20130130 |