CN202578549U - Special knuckle-thread high anti-torque oil sleeve tube connector - Google Patents
Special knuckle-thread high anti-torque oil sleeve tube connector Download PDFInfo
- Publication number
- CN202578549U CN202578549U CN 201220119476 CN201220119476U CN202578549U CN 202578549 U CN202578549 U CN 202578549U CN 201220119476 CN201220119476 CN 201220119476 CN 201220119476 U CN201220119476 U CN 201220119476U CN 202578549 U CN202578549 U CN 202578549U
- Authority
- CN
- China
- Prior art keywords
- face
- cylinder
- tooth
- sealing
- thread
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 51
- 244000309464 bull Species 0.000 claims description 15
- 239000002184 metal Substances 0.000 abstract 3
- 238000005452 bending Methods 0.000 description 5
- 210000002445 nipple Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Images
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model relates to a special knuckle-thread high anti-torque oil sleeve tube connector comprising a connecting hoop and a tube body which are in threading connection. The tooth form of a thread is the special knuckle-thread with an arc-shaped tooth top and an arc-shaped tooth bottom. The flank angle of a guiding face is different from that of a loading face. A middle column face is arranged in the middle of the inner wall of the connecting hoop, and a metal sealing structure is respectively arranged between two end faces of the middle column face and the end portion of the tube body. The metal sealing structure comprises an inner sealing face and an outer sealing face, wherein the inner sealing face is composed of an inner sealing column face and an inner sealing end face, wherein the inner sealing column face is disposed between the middle column face end face and the end portion of a connecting hoop knuckle-thread, and the inner sealing end face is perpendicular to the inner sealing column face. The outer sealing face comprises an outer sealing column face and an outer sealing end face, wherein the outer sealing column face is arranged on the outer wall of the end portion of the tube body, and the outer sealing end face is perpendicular to the outer sealing column face. Due to the fact that the unsymmetrical special knuckle-thread is adopted and the plane-type metal sealing structure is arranged, the tube connector is strong in intensify, good in sealing property, and high in anti-torque property and bend-resistant property.
Description
Technical field
The utility model relates to the oil well pipe thread joint that is applied to petroleum industry, the high torque resistant tubing and casing of specifically a kind of special round thread jointing.
Background technology
Tubing and casing in the oil well pipe industry mainly is to couple together through nipple, forms oil casing, and length reaches thousands of rice, the requirement of strength, the sealing performance that connect of nipple wherein, the having relatively high expectations of each side such as tensile load and torque resistant performance.
At present, the structure that existing tubing and casing round thread connects all is API (American Petroleum Institute (API)) standard round screw thread basically, technological comparative maturity, but result of use is not ideal enough.The sealing surface poor performance of this standard round nipple a little less than the counter-bending ability, often causes revealing at screw connection point, quality accident such as fracture, slippage.
Summary of the invention
The utility model provides the high torque resistant tubing and casing of a kind of special round thread jointing to the problems referred to above, and this joint bonding strength is high, good seal performance, and counter-bending ability is strong, and it is good to go into to detain performance.
Technical scheme according to the utility model: the high torque resistant tubing and casing of a kind of special round thread jointing; Comprise box cupling and body through being threaded; The tooth form of said screw thread is the special round thread that has at the bottom of circular arc tooth top and the circle-arc tooth; Its spigot surface tooth side angle is 40 ° ~ 50 °, and its bearing surface tooth side angle is 1 ° ~ 5 °, and its tapering is 1:8 ~ 1:20; The axial middle part of said box cupling inwall is provided with the middle cylinder of ring-type; Be respectively arranged with shape metallic leak-proof structure between the end of both ends of the surface and the said body of cylinder in the middle of said, said shape metallic leak-proof structure comprises and is arranged on the inner sealing surface on the said box cupling and is arranged on the external seal face on the said body; Said inner sealing surface comprise be arranged on said in the middle of between cylinder end face and the said box cupling internal threaded end interior sealing cylinder and with the said interior vertical interior seal face of cylinder that seals; Said external seal face comprises external seal cylinder and the external seal end face vertical with said external seal cylinder that is arranged on the outer wall of said body end.
Be provided with the inner face fillet between seal face and the said interior sealing cylinder in said; Be provided with the outer face bull nose between said external seal end face and the said external seal cylinder.
The radius of said inner face fillet is 0.2 ~ 0.8mm, the big 0 ~ 0.2mm of radius of the said inner face fillet of radius ratio of said outer face bull nose.
Be provided with the inner face bull nose between the inwall of seal face and said middle cylinder in said; Be provided with the outer face fillet between the inwall of said external seal end face and said body, said inner face bull nose equates with said outer face fillet and is 0.3 ~ 1mm.
The length of sealing cylinder is 5 ~ 20mm in said, and the length of said external seal cylinder is than the long half pitch of length of sealing cylinder in said.
The thickness of seal face is 3 ~ 10mm in said, and the thickness of said external seal end face equates with the thickness of said interior seal face.
The pitch of said screw thread is 6.5 tooth/inches ~ 4 tooth/inches, and its tooth form tooth depth is 1.5 ~ 2. 5mm.
The radius of circular arc and tooth top circular arc is 0.20 ~ 1.0mm at the bottom of the tooth of said screw thread.
The technique effect of the utility model is: the utility model adopts asymmetrical special round thread, and the spigot surface tooth side angle of tooth form is bigger than standard round screw thread, screw thread to go into to detain performance good, when machine is tight, be difficult for thread alternating; The bearing surface tooth side angle of tooth form forms barb, has improved the bonding strength of screw thread, has increased the tooth form sealing performance, has improved the counter-bending ability of joint simultaneously, and its anti-leakage performance is increased greatly; Between box cupling and body, increase the plane shape metallic leak-proof structure, make it after interference fit, can effectively improve torque resistant performance and sealing performance.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the structural representation of the utility model after decomposing.
Fig. 3 is the form of thread figure in the utility model.
Fig. 4 is the enlarged drawing of the inner sealing surface in the utility model.
Fig. 5 is the enlarged drawing of the external seal face in the utility model.
The specific embodiment
Be further described below in conjunction with the specific embodiment of accompanying drawing the utility model.
Among Fig. 1 ~ Fig. 5, comprise circular arc 8 at the bottom of box cupling 1, body 2, body 3, screw thread 4, tooth form tooth depth 5, spigot surface tooth side angle 6, bearing surface tooth side angle 7, the tooth, tooth top circular arc 9, tapering 10, pitch 11, tooth form angle 12, external seal cylinder 13, interior sealing cylinder 14, external seal end face 15, interior seal face 16, outer face bull nose 17, inner face fillet 18, outer face fillet 19, inner face bull nose 20, inner sealing surface 21, external seal face 22, middle cylinder 23, middle line 24 etc.
Like Fig. 1, shown in Figure 2, the utility model is the high torque resistant tubing and casing of an a kind of special round thread jointing, comprises the box cupling 1 and the body 2,3 that connect through screw thread 4.Box cupling 1 and body 2 are be that benchmark closely cooperates with virtual middle line 24, reach body 2 and body 3 through box cupling 1 carry out somely being connected to form oil, casing string satisfies oil gas field production instructions for use.
The tooth form of the screw thread 4 in the utility model is the special round thread that has at the bottom of circular arc tooth top and the circle-arc tooth, is changed into the asymmetric tooth form of deflection bearing surface by the tooth form of symmetry.As shown in Figure 3, the spigot surface tooth side angle 6 of screw thread 4 is 40 ° ~ 50 °, and its bearing surface tooth side angle 7 is 1 ° ~ 5 °, and the scope at tooth form angle 12 is the poor of spigot surface tooth side angle 6 and bearing surface tooth side angle 7.
The tapering 10 of screw thread 4 is 1:8 ~ 1:20; Pitch 11 is 6.5 tooth/inches ~ 4 tooth/inches (25.4 mm); Tooth form tooth depth 5 is 1.5 ~ 2.5mm.
The radius of circular arc 8 and tooth top circular arc 9 is 0.20 ~ 1.0mm at the bottom of the tooth of screw thread 4.
Referring to Fig. 1 and Fig. 2, be provided with the middle cylinder 23 of ring-type at the axial middle part of box cupling 1 inwall again, be respectively arranged with shape metallic leak-proof structure between the end of the both ends of the surface of middle cylinder 23 and body 2,3.Shape metallic leak-proof structure comprises the inner sealing surface 21 that is arranged on the box cupling 1 and is arranged on the external seal face 22 on the body 2,3.
As shown in Figure 4, inner sealing surface 21 comprise be arranged in the middle of cylinder 23 end faces and interior sealing cylinder 14 between box cupling 1 internal threaded end reach the interior seal face 16 vertical with interior sealing cylinder 14.Be provided with inner face fillet 18 between interior seal face 16 and the interior sealing cylinder 14, the radius of inner face fillet 18 is 0.2 ~ 0.8mm; Be provided with inner face bull nose 20 between the inwall of interior seal face 16 and middle cylinder 23, inner face bull nose 20 is 0.3 ~ 1mm.The length of interior sealing cylinder 14 is 5 ~ 20mm, and the thickness of interior seal face 16 is 3 ~ 10mm.
As shown in Figure 5, external seal face 22 comprises the external seal cylinder that is arranged on body 2, the 3 end outer walls 13 and the external seal end face 15 vertical with external seal cylinder 13.External seal cylinder 13 and interior sealing cylinder 14 interference fit, the magnitude of interference requires the external diameter according to body 2,3, and it is 0.20 ~ 0.8mm that the interior sealing of control cylinder 14 external diameters deduct external seal cylinder 13 external diameter scopes.Be provided with outer face bull nose 17 between external seal end face 15 and the external seal cylinder 13, the big 0 ~ 0.2mm of radius of the radius ratio inner face fillet 18 of outer face bull nose 17; Be provided with outer face fillet 19 between the inwall of external seal end face 15 and body 2,3, outer face fillet 19 equates with inner face bull nose 20.The length of external seal cylinder 13 is than the long half pitch 11 of the length of interior sealing cylinder 14, and the thickness of external seal end face 15 equates with the thickness of interior seal face 16, any interference do not take place after the interference fit and gets final product to reach.
The utility model when operation, earlier the external screw thread of body 2 is put into earlier and carried out machine behind internal thread 3 ~ 7 buttons of box cupling 1 and twist and connect.Because spigot surface tooth side angle 6 gradients are bigger, be lowered to button in action of gravity when putting button and be very easy to, can not cause internal thread tooth top and external screw thread tooth top top button, cause the tight phenomenon of thread alternating machine.Box cupling 1 has inner sealing surface 21; Twist when machine and to have bigger torque resistant effect after taking over that being full of screws and cooperating; The tight position of machine and torque can be made separate stipulations according to the tight identical or technical papers of deduction on the API standard round screw thread, but must satisfy closely cooperating of inner sealing surface 21 and external seal face 22 and internal and external threads 4.Same fastening method; Is that benchmark closely cooperate with body 3 with virtual middle line 24 with box cupling 1; Reach body 2 and body 3 through box cupling 1 carry out somely being connected to form oil, casing string satisfies oil gas field production instructions for use, when going into the well in the oil field its connector machine stressed joint is one by one formed thousands of meters oil casing.
The utility model adopts asymmetrical special round thread, and the spigot surface tooth side angle of tooth form is bigger than standard round screw thread, screw thread to go into to detain performance good, when machine is tight, be difficult for thread alternating; The bearing surface tooth side angle of tooth form forms barb, has improved the bonding strength of screw thread, has increased the tooth form sealing performance, has improved the counter-bending ability of joint simultaneously, and its anti-leakage performance is increased greatly; Between box cupling and body, increased a shape metallic leak-proof structure, made it after interference fit, can effectively improve torque resistant performance and sealing performance; Shape metallic leak-proof structure adopts plane sealing structure, and processing is simple; Increase the overall length of box cupling, improved the counter-bending ability of joint.
The utility model processing is simple and convenient, and the scope of application is wide, and is safe and reliable; Can bear the complicated power of extraneous high strength and apply and do not reveal or damage, satisfy the instructions for use in oil field.
Claims (8)
1. the high torque resistant tubing and casing of special round thread jointing; Comprise the box cupling (1) and the body (2,3) that connect through screw thread (4); It is characterized in that: the tooth form of said screw thread (4) is the special round thread that has at the bottom of circular arc tooth top and the circle-arc tooth; Its spigot surface tooth side angle (6) is 40 ° ~ 50 °, and its bearing surface tooth side angle (7) is 1 ° ~ 5 °, and its tapering (10) is 1:8 ~ 1:20; The axial middle part of said box cupling (1) inwall is provided with the middle cylinder (23) of ring-type; Be respectively arranged with shape metallic leak-proof structure between the end of the both ends of the surface of cylinder (23) and said body (2,3) in the middle of said, said shape metallic leak-proof structure comprises the inner sealing surface (21) that is arranged on the said box cupling (1) and is arranged on the external seal face (22) on the said body (2,3); Said inner sealing surface (21) comprise be arranged on said in the middle of between cylinder (23) end face and said box cupling (1) internal threaded end interior sealing cylinder (14) and with the said interior vertical interior seal face (16) of cylinder (14) that seals; Said external seal face (22) comprises external seal cylinder (13) and the external seal end face (15) vertical with said external seal cylinder (13) that is arranged on said body (2,3) the end outer wall.
2. according to the high torque resistant tubing and casing of the described special round thread of claim 1 jointing, it is characterized in that: be provided with inner face fillet (18) between seal face (16) and the said interior sealing cylinder (14) in said; Be provided with outer face bull nose (17) between said external seal end face (15) and the said external seal cylinder (13).
3. according to the high torque resistant tubing and casing of the described special round thread of claim 2 jointing; It is characterized in that: the radius of said inner face fillet (18) is 0.2 ~ 0.8mm, the big 0 ~ 0.2mm of radius of the said inner face fillet of the radius ratio of said outer face bull nose (17) (18).
4. according to the high torque resistant tubing and casing of the described special round thread of claim 1 jointing, it is characterized in that: be provided with inner face bull nose (20) between the inwall of seal face (16) and said middle cylinder (23) in said; Be provided with outer face fillet (19) between the inwall of said external seal end face (15) and said body (2,3), said inner face bull nose (20) equates with said outer face fillet (19) and is 0.3 ~ 1mm.
5. according to the high torque resistant tubing and casing of the described special round thread of claim 1 jointing; It is characterized in that: the length of sealing cylinder (14) is 5 ~ 20mm in said, and the length of said external seal cylinder (13) is than the long half pitch (11) of length of sealing cylinder (14) in said.
6. according to the high torque resistant tubing and casing of the described special round thread of claim 1 jointing, it is characterized in that: the thickness of seal face (16) is 3 ~ 10mm in said, and the thickness of said external seal end face (15) equates with the thickness of said interior seal face (16).
7. according to the high torque resistant tubing and casing of the described special round thread of claim 1 jointing, it is characterized in that: the pitch (11) of said screw thread (4) is 6.5 tooth/inches ~ 4 tooth/inches, and its tooth form tooth depth (5) is 1.5 ~ 2. 5mm.
8. according to claim 1 or the high torque resistant tubing and casing of 7 described special round threads jointing, it is characterized in that: the radius of circular arc (8) and tooth top circular arc (9) is 0.20 ~ 1.0mm at the bottom of the tooth of said screw thread (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220119476 CN202578549U (en) | 2012-03-27 | 2012-03-27 | Special knuckle-thread high anti-torque oil sleeve tube connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220119476 CN202578549U (en) | 2012-03-27 | 2012-03-27 | Special knuckle-thread high anti-torque oil sleeve tube connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202578549U true CN202578549U (en) | 2012-12-05 |
Family
ID=47247970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220119476 Expired - Fee Related CN202578549U (en) | 2012-03-27 | 2012-03-27 | Special knuckle-thread high anti-torque oil sleeve tube connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202578549U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587843A (en) * | 2012-03-27 | 2012-07-18 | 无锡西姆莱斯石油专用管制造有限公司 | Special round thread highly-torque-resistant oil casing coupling |
| CN110374522A (en) * | 2019-06-28 | 2019-10-25 | 中国石油天然气集团有限公司 | A kind of shale gas exploitation nipple |
-
2012
- 2012-03-27 CN CN 201220119476 patent/CN202578549U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587843A (en) * | 2012-03-27 | 2012-07-18 | 无锡西姆莱斯石油专用管制造有限公司 | Special round thread highly-torque-resistant oil casing coupling |
| CN110374522A (en) * | 2019-06-28 | 2019-10-25 | 中国石油天然气集团有限公司 | A kind of shale gas exploitation nipple |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202946041U (en) | Zigzag air-sealed oil well pipe thread joint structure | |
| CN202673174U (en) | High seal special buttress thread pipe connector | |
| CN102678071A (en) | High-airtightness special buttress thread sleeve connection joint | |
| CN202578555U (en) | Special buttress thread oil casing joint | |
| CN102678065B (en) | The special buttress thread union of high sealability | |
| CN103362450B (en) | Non-coupling multi-sealing tooth-width-variable wedge type threaded oil well pipe structure | |
| CN202578549U (en) | Special knuckle-thread high anti-torque oil sleeve tube connector | |
| CN203531775U (en) | Straight-thread connector with three torque shoulders | |
| CN202673178U (en) | High-sealing buttress threaded conduit connecting joint | |
| CN202578548U (en) | Special knuckle threaded pipe joint | |
| CN102852466A (en) | Special buttress thread oil sleeve connecting joint | |
| CN102587842A (en) | Special round thread highly-torque-resistant pipe coupling | |
| CN202578545U (en) | High-resistance torque tube joint with special knuckle threads | |
| CN202578552U (en) | Connecting joint with special knuckle threads for oil casing | |
| CN102606086A (en) | Connecting joint with special knuckle threads for oil casing | |
| CN202673175U (en) | High seal special buttress thread sleeve pipe connector | |
| CN102852468B (en) | High-sealing special circular thread oil sleeve connection connector | |
| CN202483470U (en) | Special-round-thread joint for oil casing pipes | |
| CN102587843A (en) | Special round thread highly-torque-resistant oil casing coupling | |
| CN103362459A (en) | Arc-shaped conical surface sealed variable tooth wide wedge-type coupling structure and oil well pipe structure | |
| CN202578554U (en) | Special buttress thread oil sleeve connection joint | |
| CN103321587B (en) | Plane-shoulder planoconic sealing surface variable-tooth-width wedge-type coupling structure and oil well pipe structure | |
| CN103362455A (en) | Bending-resistant high-sealing variable-tooth-width wedge type coupling structure and oil well pipe structure | |
| CN103321586B (en) | Curved-surface ledge flat-cone-shaped sealing-surface tooth-change wide-wedge-shaped coupling structure and oil well pipe structure | |
| CN202673177U (en) | High sealing partial trapezoidal thread casing pipe connector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20140922 Granted publication date: 20121205 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20150322 Granted publication date: 20121205 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20180327 |