CN209369742U - A kind of tubing and casing Hermetical connecting structure - Google Patents
A kind of tubing and casing Hermetical connecting structure Download PDFInfo
- Publication number
- CN209369742U CN209369742U CN201822162668.2U CN201822162668U CN209369742U CN 209369742 U CN209369742 U CN 209369742U CN 201822162668 U CN201822162668 U CN 201822162668U CN 209369742 U CN209369742 U CN 209369742U
- Authority
- CN
- China
- Prior art keywords
- tube body
- casing
- tubing
- conical surface
- box cupling
- 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.)
- Active
Links
Landscapes
- Earth Drilling (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model relates to a kind of tubing and casing Hermetical connecting structures.Including tubing and casing tube body and oil casing collar；External screw thread is arranged in tubing and casing tube body one end, and tube body conical surface seal face, tube end torque shoulder is arranged in the externally threaded front end of tube body；Oil casing collar offers the connecting hole of fuel feeding casing pipe insertion, is disposed with coupling inner thread, box cupling conical surface seal face and box cupling torque shoulder from the outside to the core in connecting hole.The conical surface seal face of the utility model internal screw thread and external screw thread engagement, tube body conical surface seal face and oil casing collar is interference fitted, and is greatly enhanced the leakproofness of tubing and casing, is improved sealing effect；The torque shoulder in torque shoulder and oil casing collar end in tubing and casing tube end cooperates, and can play the role of torque resistant well when external force applies torque, improve incompressible, the reaction torque of tubing and casing junction, enhance concatenation ability.
Description
Technical field
The utility model belongs to oil exploitation drilling equipment technical field, is related to the oil casing threaded connection skill of drilling equipment
Art, in particular to a kind of novel metal of API buttress thread optimization seal special thread oil casing structure.
Background technique
As oil exploration technology is continuously improved, high temperature well, high-pressure well, deep-well are largely developed, down-hole string Service Environment
Constantly deteriorate, to the switching performance of oil casing collar, sealing performance and anti-galling performance, more stringent requirements are proposed for this.Oil at present
The box cupling that gas field scene uses can be divided into API threaded collar joint and special thread box cupling two major classes.API threaded collar joint passes through screw thread
Between interference fit and thread compound block realize envelope, and special thread box cupling by independent sealing surface and torque shoulder realization it is more
Grade sealing, therefore special thread box cupling ratio API box cupling bonding strength with higher and preferable gas tightness.Research and practice
Show that the connection of common API threaded collar joint and sealing performance are no longer satisfied the requirement of high temperature high pressure deep well, for pressure
Higher oil/gas well, it is proposed that select special thread box cupling.
Utility model content
The purpose of this utility model is carried out to API buttress thread excellent for technological deficiency existing in the prior art
Change, increase metal sealing, a kind of novel metal sealing special thread oil casing structure is provided.
The technical solution adopted in the utility model is thus: a kind of tubing and casing Hermetical connecting structure, including tubing and casing tube body
(1) and with tubing and casing tube body (1) oil casing collar (5) connecting；
Tube body external screw thread (2) are arranged in described tubing and casing tube body (1) one end, are arranged in the front end of the tube body external screw thread (2)
Tube body conical surface seal face (3) is arranged in the joint of tube body conical surface seal face (3) front end and tubing and casing tube body (1) end face
Tube end torque shoulder (4)；
The oil casing collar (5) offers the connecting hole for the tubing and casing tube body (1) insertion, and the connecting hole is interior certainly
Coupling inner thread (6), box cupling conical surface seal face (7) and box cupling torque shoulder (8), the tubing and casing is disposed with outside to inside to connect
It binds round and stepped hole is set in (5), the corner of two stepped hole joints is arranged in the box cupling torque shoulder (8)；
The tube body external screw thread (2) and coupling inner thread (6) are correspondingly arranged, tube body conical surface seal face (3) and box cupling
Conical surface seal face (7) is correspondingly arranged, and the tube end torque shoulder (4) and box cupling torque shoulder (8) are correspondingly arranged.
Adopting conical surface interference is taken to match with oil casing collar (5) box cupling conical surface seal face (7) in tube body conical surface seal face (3)
It closes, the angle of the conical surface and horizontal plane is 28 °~33 °.
The tube end torque shoulder (4) takes circular bead surface interference to match with oil casing collar (5) box cupling torque shoulder (8)
Close, the angle of circular bead surface and vertical plane be that tube end torque shoulder (4) are 18 °~22 °, box cupling torque shoulder (8) for 13 °~
17°。
The tube body external screw thread (2) and coupling inner thread (6) use novel partially trapezoidal tapered tread, pitch P setting pipe
It is 8 teeth/in that extracorporeal thread (2), which is 2-3/8~2-7/8, and it is 6 teeth/in that tube body external screw thread (2), which is 3-1/2~4-1/2, in box cupling
Screw thread (6) is that 5~13-3/8 is 5 teeth/in, and thread crest is parallel to element of cone.
The carrying face angle L of the novel partially trapezoidal tapered tread be set in the clockwise direction angle of vertical plane be 0 °~
3 °, guiding face angle S is set between 10 °~13 °.
Tube body conical surface seal face (3) and the primary sealing area that oil casing collar (5) box cupling conical surface seal face (7) is formed are straight
Diameter tolerance+0.05mm, primary sealing area length >=0.5mm, tube body and box cupling primary sealing area magnitude of interference 0.3mm.
Pitch diameter of thread magnitude of interference 0.1mm, pitch diameter of thread measurement point to shoulder apart from tube body and box cupling range difference≤
0.05mm。
The utility model has the advantages that: as internal screw thread and external screw thread engage, tube body conical surface seal face and oil casing collar
Conical surface seal face interference fit, greatly enhance the leakproofness of tubing and casing, improve sealing effect；Torsion in tubing and casing tube end
Torque shoulder on square shoulder and oil casing collar end cooperates, and can play the role of torque resistant well when external force applies torque,
The incompressible of tubing and casing junction, reaction torque effect are improved, concatenation ability is enhanced.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram of the utility model tube body male end.
Fig. 3 is the structural schematic diagram of the utility model tube body female end.
Fig. 4 is the enlarged diagram of the utility model helicitic texture.
In figure, 1- tubing and casing tube body, 2- tube body external screw thread, 3- tube body conical surface seal face, 4- tube end torque shoulder, 5- oil
Casing coupling, 6- coupling inner thread, 7- box cupling conical surface seal face, 8- box cupling torque shoulder, α-primary sealing area conical surface and horizontal plane
Angle, β-circular bead surface and vertical plane angle, L- carry face angle, and S- is oriented to face angle, P- screw pitch.
Specific embodiment
Further explanation is made to the utility model with reference to the accompanying drawing, more preferably to understand the utility model:
To realize the purpose of this utility model, the technical scheme adopted by the utility model is a kind of novel metal seals
Special buckle vitta structure, including tubing and casing tube body 1 and oil casing collar 5,1 one end of tubing and casing tube body are tube body female ends, separately
One end is tube body male end and is successively arranged tube body external screw thread 2, tube body conical surface seal face 3, tube end torque shoulder 4；Oil jacket
5 one end of pipe box cupling is box cupling male end, and the other end is coupling inner thread end and is successively arranged coupling inner thread 6, the box cupling conical surface
Sealing surface 7, box cupling torque shoulder 8, as internal screw thread and external screw thread engage, tube body conical surface seal face 3 and oil casing collar 5
Box cupling conical surface seal face 7 cooperates；The box cupling in tube end torque shoulder 4 and 5 end of oil casing collar on 1 end of tubing and casing tube body is turned round
Square shoulder 8 cooperates.
Wherein, tube body conical surface seal face 3 and the box cupling conical surface seal face 7 of oil casing collar 5 take adopting conical surface interference to match
It closes, the angle of the conical surface and horizontal plane is 28 °~33 °.
Wherein, the tube end torque shoulder 4 and the box cupling torque shoulder 8 of oil casing collar 5 take circular bead surface interference to match
It closes, the angle of circular bead surface and vertical plane is 18 °~22 ° of HDT1 oil pipe, 13 °~17 ° of HDC1 casing.
Wherein, the tube body external screw thread 2 and coupling inner thread 6 use novel partially trapezoidal tapered tread, pitch P setting
HDT1 oil pipe 2-3/8~2-7/8 is 8 teeth/in, and HDT1 oil pipe 3-1/2~4-1/2 is 6 teeth/in, and 5~13-3/8 of HDC1 casing is
5 teeth/in, thread crest are parallel to element of cone.
Wherein, the carrying face angle L of the novel partially trapezoidal tapered tread is set in the clockwise direction angle with vertical plane
It is 0 °~3 °, guiding face angle S is set between 10 °~13 °.
Oil casing threaded box cupling sealing structure includes main seal structure, auxiliary sealing structure and thread seal, primary seal knot
Structure forms (i.e. corresponding conical surface seal face) by metal/metal radial seal structure, and auxiliary sealing structure is torque shoulder, screw thread
It is sealed into the sealing of buttress thread radial interference, structural parameters include primary sealing area diameter, primary sealing area length, primary seal face cone
Degree, primary sealing area magnitude of interference, circular bead surface angle, circular bead surface length, circular bead surface magnitude of interference, sealing structure position and arc radius,
The distance of pitch diameter of thread magnitude of interference, pitch diameter of thread measurement point to shoulder.
Wherein, primary sealing area diameter tolerance ± 0.05mm, primary sealing area length >=0.5mm, tube body and box cupling primary sealing area
Magnitude of interference 0.3mm.
Wherein, pitch diameter of thread magnitude of interference 0.1mm, pitch diameter of thread measurement point to shoulder apart from tube body and box cupling range difference≤
0.05mm。
It should be noted that " connection " described herein and the word for expressing " connection ", as " being connected ",
" connected " etc. had both included that a certain component is directly connected to another component, and had also included that a certain component passes through other component and another portion
Part is connected.
Claims (7)
1. a kind of tubing and casing Hermetical connecting structure, which is characterized in that even including tubing and casing tube body (1) and with tubing and casing tube body (1)
The oil casing collar (5) connect；
Tube body external screw thread (2) are arranged in described tubing and casing tube body (1) one end, and tube body is arranged in the front end of the tube body external screw thread (2)
Tube body is arranged in the joint of tube body conical surface seal face (3) front end and tubing and casing tube body (1) end face in conical surface seal face (3)
It holds torque shoulder (4)；
The oil casing collar (5) offers the connecting hole for the tubing and casing tube body (1) insertion, and the connecting hole is interior from export-oriented
Inside it is disposed with coupling inner thread (6), box cupling conical surface seal face (7) and box cupling torque shoulder (8), the oil casing collar
(5) stepped hole is set in, and the corner of two stepped hole joints is arranged in the box cupling torque shoulder (8)；
The tube body external screw thread (2) and coupling inner thread (6) are correspondingly arranged, tube body conical surface seal face (3) and the box cupling conical surface
Sealing surface (7) is correspondingly arranged, and the tube end torque shoulder (4) and box cupling torque shoulder (8) are correspondingly arranged.
2. a kind of tubing and casing Hermetical connecting structure according to claim 1, which is characterized in that tube body conical surface seal face
(3) adopting conical surface interference is taken to cooperate with oil casing collar (5) box cupling conical surface seal face (7), the angle of the conical surface and horizontal plane is 28 °
~33 °.
3. a kind of tubing and casing Hermetical connecting structure according to claim 1, which is characterized in that the tube end torque shoulder
(4) circular bead surface is taken to be interference fitted with oil casing collar (5) box cupling torque shoulder (8), the angle of circular bead surface and vertical plane is
Tube end torque shoulder (4) is 18 °~22 °, and box cupling torque shoulder (8) is 13 °~17 °.
4. a kind of tubing and casing Hermetical connecting structure according to claim 1, which is characterized in that the tube body external screw thread (2)
Novel partially trapezoidal tapered tread is used with coupling inner thread (6), pitch P sets tube body external screw thread (2) as 2-3/8~2-7/8
For 8 teeth/in, it is 6 teeth/in that tube body external screw thread (2), which is 3-1/2~4-1/2, coupling inner thread (6) be 5~13-3/8 be 5 teeth/
In, thread crest are parallel to element of cone.
5. a kind of tubing and casing Hermetical connecting structure according to claim 4, which is characterized in that the novel partially trapezoidal circular cone
It is 0 °~3 ° that the carrying face angle L of screw thread, which is set in the clockwise direction angle of vertical plane, and guiding face angle S is set in 10 °~13 °
Between.
6. a kind of tubing and casing Hermetical connecting structure according to claim 2, which is characterized in that tube body conical surface seal face
(3) the primary sealing area diameter tolerance ± 0.05mm formed with oil casing collar (5) box cupling conical surface seal face (7), primary sealing area are long
Degree >=0.5mm, tube body and box cupling primary sealing area magnitude of interference 0.3mm.
7. a kind of tubing and casing Hermetical connecting structure according to claim 5, which is characterized in that pitch diameter of thread magnitude of interference
0.1mm, pitch diameter of thread measurement point to shoulder apart from tube body and box cupling range difference≤0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822162668.2U CN209369742U (en) | 2018-12-23 | 2018-12-23 | A kind of tubing and casing Hermetical connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822162668.2U CN209369742U (en) | 2018-12-23 | 2018-12-23 | A kind of tubing and casing Hermetical connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209369742U true CN209369742U (en) | 2019-09-10 |
Family
ID=67830193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822162668.2U Active CN209369742U (en) | 2018-12-23 | 2018-12-23 | A kind of tubing and casing Hermetical connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209369742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488223A (en) * | 2018-12-23 | 2019-03-19 | 扬州龙川钢管有限公司 | A kind of novel seal button oil annular tube structure |
-
2018
- 2018-12-23 CN CN201822162668.2U patent/CN209369742U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488223A (en) * | 2018-12-23 | 2019-03-19 | 扬州龙川钢管有限公司 | A kind of novel seal button oil annular tube structure |
| CN109488223B (en) * | 2018-12-23 | 2024-05-28 | 扬州龙川能源装备有限公司 | Novel sealing oil-buckling sleeve structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202946041U (en) | Zigzag air-sealed oil well pipe thread joint structure | |
| CN104453738A (en) | Airtight seal sleeve joint | |
| CN202380985U (en) | Tubular air seal thread joint | |
| UA94640C2 (en) | Tightened threaded joint of oil-field tubes | |
| CN201322148Y (en) | High performance oil pipe hermetic seal threaded connection structure | |
| CN209369742U (en) | A kind of tubing and casing Hermetical connecting structure | |
| CN102678065A (en) | High-airtightness special buttress thread pipe joint | |
| CN207278200U (en) | Air-tight seal screw joint | |
| CN109505530A (en) | A kind of tubing and casing Hermetical connecting structure | |
| CN202125258U (en) | Oil sleeve connector with high sealing performance and thread-gluing resistance | |
| CN201874485U (en) | Metal sealed casing threaded connecting structure based on API (American Petroleum Institute) standard round threads | |
| CN207647476U (en) | Double-sealing face Special threading connector | |
| CN202090850U (en) | Pipeline connecting piece between thread and conical seal surface with limited circular bead | |
| CN201502336U (en) | Special thread oil casing connector | |
| CN203403832U (en) | Air-tight seal screwed joint | |
| JP2005240888A (en) | Threaded joint for oil well pipe | |
| CN102352727A (en) | 8TPI oil or casing pipe threaded connector | |
| CN206329284U (en) | A kind of dual hermetic seal special buckle oil pipe of metallic elastic | |
| CN201705230U (en) | Special threading connector for sleeve with small external diameter | |
| CN209855720U (en) | Novel sealed oil casing structure that detains | |
| CN201778676U (en) | Low pressure-resistant air-tight seal sleeve joint | |
| CN109488223A (en) | A kind of novel seal button oil annular tube structure | |
| CN205532356U (en) | Petroleum casing joint | |
| CN203188922U (en) | Hermetic seal buckle profile | |
| CN102996079A (en) | Tubular air sealing screwed joint and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |