CN202578554U - Special buttress thread oil sleeve connection joint - Google Patents
Special buttress thread oil sleeve connection joint Download PDFInfo
- Publication number
- CN202578554U CN202578554U CN 201220181547 CN201220181547U CN202578554U CN 202578554 U CN202578554 U CN 202578554U CN 201220181547 CN201220181547 CN 201220181547 CN 201220181547 U CN201220181547 U CN 201220181547U CN 202578554 U CN202578554 U CN 202578554U
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- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract 4
- 238000010168 coupling process Methods 0.000 abstract 4
- 238000005859 coupling reaction Methods 0.000 abstract 4
- 238000005452 bending Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model relates to a special buttress thread oil sleeve connection joint, which comprises a coupling and a sleeve body that are connected through a thread; the axial middle part of the inner wall of the coupling is provided with an annular inner stepped cylindrical surface; a standard inner buttress thread is respectively machined at two ends of the coupling; the rear end of each standard inner buttress thread, which is close to the inner stepped cylindrical surface, is provided with an inner sealing thread; a standard outer buttress thread is machined on the outer wall of the end part of the sleeve body; the front end of the outer buttress thread is provided with an outer sealing thread; and the inner sealing thread and the outer sealing thread are special buttress threads of which flank angles of bearing surfaces are negative angles. According to the special buttress thread oil sleeve connection joint, the special buttress threads of which the flank angles of the bearing surfaces are negative angles are additionally arranged on the end parts of the standard buttress threads of the coupling and the sleeve body to form a barbed-type thread-form acme thread structure, and in addition, the compressive load-resistant bearing contact surface is additionally arranged at the end parts of the thread respectively, therefore the connection strength and the compressive load-resistant capability of the joint are greatly increased, and meanwhile, the anti-torque property of the joint is improved.
Description
Technical field
The utility model relates to the oil well pipe thread joint that is applied to petroleum industry, specifically a kind of special buttress thread tubing and casing 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.
Existing API (American Petroleum Institute (API)) buttress thread joint, exist the torque resistant performance a little less than, bonding strength is low, the anti-deficiencies such as ruining ability of squeezing makes oil well pipe company or oil field seek the better and reliable special thread syndeton of performance gradually.
Summary of the invention
The utility model provides a kind of special buttress thread tubing and casing jointing to the problems referred to above, and this joint bonding strength is high, and incompressible load can be strong, and the torque resistant performance is high simultaneously.
Technical scheme according to the utility model: a kind of special buttress thread tubing and casing jointing; Comprise box cupling and body through being threaded; The axial middle part of said box cupling inwall is provided with the interior step cylinder of ring-type; The two ends of said box cupling are processed with the inclined to one side trapezoidal internal thread of standard, and said inclined to one side trapezoidal internal thread is provided with interior sealing thread near the rear end of step cylinder in said, is processed with the trapezoidal partially external screw thread of standard on the outer wall of said body end; Said trapezoidal partially externally threaded front end is provided with the external seal screw thread, and it is the special buttress thread of negative angle that said interior sealing thread and said external seal screw thread adopt bearing surface tooth side angle.
The value of said bearing surface tooth side angle is-3 ° ~-10 °.
The tooth number of sealing thread and said external seal screw thread is 2 ~ 5 teeth in said.
The tooth number of sealing thread and said external seal screw thread is 2 teeth or 3 teeth in said.
The end of step cylinder is provided with the internal torque shoulder in the said box cupling, and said internal torque shoulder is provided with recessed interior shoulder angle, and said interior shoulder angle is near chamfering in the outward-dipping formation in one side of said box cupling axis; The end of said body is provided with the outer torque shoulder that matches with said internal torque shoulder, and said outer torque shoulder is provided with the outer shoulder angle of protrusion, one side said outer shoulder angle forms outer chamfering near sloping inwardly of said body axis.
The value of shoulder angle is 110 ° ~ 160 ° in said, and the value of said outer shoulder angle is bigger 0 ~ 2 ° than the value of shoulder angle in said, and the value of said interior chamfering is 10 ° ~ 60 °, and the value of said outer chamfering equates with the value of said interior chamfering.The value of said outer shoulder angle than the value of shoulder angle in said big 0.5 ° ~ 1 °.
Distance in said between the summit of shoulder angle and the said interior step cylinder inwall is interior shoulder vertex distance, and said interior shoulder vertex distance is 1/2 of interior shoulder thickness and a tooth depth sum; Distance between the summit of said outer shoulder angle and the said inboard wall of tube body is outer shoulder vertex distance, and said outer shoulder vertex distance is 1/2 of outer shoulder thickness and a tooth depth sum.Said outer shoulder thickness equates with said interior shoulder thickness, is 5 ~ 15mm.
Place, the summit of shoulder angle is provided with the inner vertex circular arc in said, and the radius of said inner vertex circular arc is 1.0 ~ 5.0mm; The place, summit of said outer shoulder angle is provided with outer dead centre circular arc, the big 0.2 ~ 1.0mm of radius of the said inner vertex circular arc of the radius ratio of said outer dead centre circular arc.
The technique effect of the utility model is: the utility model has increased the special buttress thread of bearing surface tooth side angle employing negative angle in the end of the standard buttress thread of box cupling and body; Form fluking type tooth form acme thread structure; And increased the carrying contact surface of incompressible load in the end of screw thread; Increase the bonding strength and the incompressible load-carrying ability of joint greatly, improved its torque resistant performance simultaneously.
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 tooth form figure of the sealing thread in the utility model.
Fig. 4 is the enlarged drawing of the internal torque shoulder in the utility model.
Fig. 5 is the enlarged drawing of the outer torque shoulder 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 box cupling 1, body 2, circular arc 16, spigot surface crest circular arc 17, interior shoulder thickness 18, outer shoulder thickness 19, interior shoulder vertex distance 20, outer shoulder vertex distance 21, interior shoulder angle 22, outer shoulder angle 23, inner vertex circular arc 24, outer dead centre circular arc 25, interior chamfering 26, outer chamfering 27, interior step cylinder 28, middle line 29, body 30 etc. at the bottom of circular arc 15, the spigot surface tooth at the bottom of trapezoidal internal thread 3, trapezoidal partially external screw thread 4, interior sealing thread 5, external seal screw thread 6, internal torque shoulder 7, outer torque shoulder 8, tapering 9, pitch 10, tooth depth 11, spigot surface tooth side angle 12, bearing surface tooth side angle 13, bearing surface crest circular arc 14, the bearing surface tooth partially.
Like Fig. 1, shown in Figure 2; The utility model is a kind of special buttress thread tubing and casing jointing; Comprise box cupling 1 and body 2,30 through being threaded, box cupling 1 and body the 2, the 30th are benchmark with virtual middle line 29, screw with internal and external threads; Carry out some oil, casing strings of being connected to form with body 2 and body 30 through box cupling 1, satisfy oil gas field production instructions for use.
The axial middle part of box cupling 1 inwall is provided with the interior step cylinder 28 of ring-type, and the length range of step cylinder 28 is 50 ~ 200mm in the box cupling, increases the bonding strength and the counter-bending ability of joint.The two ends of box cupling 1 are processed with the inclined to one side trapezoidal internal thread 3 of standard, and trapezoidal internal thread 3 is provided with interior sealing thread 5 near the rear end of interior step cylinder 28 partially.Be processed with the trapezoidal partially external screw thread 4 of standard on the outer wall of body 2,30 ends, the front end of trapezoidal partially external screw thread 4 is provided with external seal screw thread 6.Trapezoidal internal thread 3 adopts the API standard with trapezoidal partially external screw thread 4 partially.
As shown in Figure 3; It is the special buttress thread of negative angle that interior sealing thread 5 adopts bearing surface tooth side angle 13 with external seal screw thread 6; All the other parameters, as: at the bottom of tapering 9, pitch 10, tooth depth 11, spigot surface tooth side angle 12, bearing surface crest circular arc 14, the bearing surface tooth at the bottom of circular arc 15, the spigot surface tooth circular arc 16, spigot surface crest circular arc 17 all with trapezoidal internal thread 3 partially and identical with trapezoidal partially external screw thread 4.
The value of bearing surface tooth side angle 13 is-3 ° ~-10 °, forms the fluking type tooth form, because after bearing surface tooth side angle 13 is negative angle, it is wide that its tooth form width is less than the tooth of API standard buttress thread, can not cause any interference of internal and external threads when screwing.Interior sealing thread 5 is 2 ~ 5 teeth with the tooth number of external seal screw thread 6, is preferably 2 teeth or 3 teeth.Adding man-hour; The form of thread angle should seamlessly transit when-3 ° of transition by+3 °; Transition face length can not be greater than 1 pitch; And the tooth of its external seal screw thread 6 count total length than the tooth of interior sealing thread 5 count big (0.3 ~ 1) the individual pitch of total length apart from length, the best is the distance of 0.5 tooth, guarantees that like this it leaves enough surpluses when cooperating and can not interfere.
As shown in Figure 4, the end of step cylinder 28 is provided with internal torque shoulder 7 in the box cupling 1.Internal torque shoulder 7 is provided with recessed interior shoulder angle 22, and interior shoulder angle 22 is near chamfering 26 in the outward-dipping formation in one side of box cupling 1 axis.The value of interior shoulder angle 22 is 110 ° ~ 160 °, and the value of interior chamfering 26 is 10 ° ~ 60 °.Distance between the summit of interior shoulder angle 22 and interior step cylinder 28 inwalls is interior shoulder vertex distance 20, and interior shoulder vertex distance 20 is interior shoulder thickness 18 and 1/2 of tooth depth 11 sums, and interior shoulder thickness 18 is 5 ~ 15mm.The place, summit of interior shoulder angle 22 is provided with inner vertex circular arc 24, and the radius of inner vertex circular arc 24 is 1.0 ~ 5.0mm.
As shown in Figure 5, the end of body 2,30 is provided with the outer torque shoulder 8 that matches with internal torque shoulder 7.Outer torque shoulder 8 is provided with the outer shoulder angle 23 of protrusion, one side outer shoulder angle 23 forms outer chamfering 27 near sloping inwardly of body 2,30 axis.The value of outer shoulder angle 23 is bigger 0 ~ 2 ° than the value of interior shoulder angle 22, and is preferably big 0.5 ° ~ 1 °, satisfies the state of plastic deformation that inside and outside shoulder causes and be issued to interference fit under the tight situation of machine.The value of outer chamfering 27 equates with the value of interior chamfering 26.Distance between the summit of outer shoulder angle 23 and body 2,30 inwalls is outer shoulder vertex distance 21, and outer shoulder vertex distance 21 is outer shoulder thickness 19 and 1/2 of tooth depth 11 sums, and outer shoulder thickness 19 equates with interior shoulder thickness 18, is 5 ~ 15mm.The place, summit of outer shoulder angle 23 is provided with outer dead centre circular arc 25, the big 0.2 ~ 1.0mm of radius of the radius ratio inner vertex circular arc 24 of outer dead centre circular arc 25.
During the utility model operation; Any end of box cupling 1 is inserted in earlier on the body 2, overlaps and fashionablely should the external screw thread of the internal thread of box cupling 1 and body 2 be inserted in 3 ~ 7 buttons earlier, should be light and slow during hitch; With the internal and external threads make-up then manpower screw in; Till screwing when motionless with manpower, hand-tight box cupling that spins together 1 and body 2 usefulness petroleum pipeline screw-on machine devices are carried out further machine twist and connect, reach the interference fit state when machine is stubborn to be connect.
When box cupling 1 and body 2 machine twist take over that being full of screws and cooperate after; Sealing thread 5, external seal screw thread 6 have reached the interference fits state and have formed certain sealing in it; Shoulder thickness 18 has reached interference fit with outer shoulder thickness 19 simultaneously; Both shoulder thickness and tooth depth spigot surface are on same plane because of it, and contact surface is bigger, have increased its high torque resistant performance and compressive load ability greatly.Position that machine is tight and torque can be made separate stipulations according to API standard operation or technical papers, but shoulder thickness 18 must not have any gap with outer shoulder thickness 19 in must satisfying after machine tightly screws.Same fastening method is that benchmark closely cooperate with body 30 with virtual middle line 29 with box cupling 1; Reach body 30 and body 2 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 has increased the special buttress thread of bearing surface tooth side angle employing negative angle in the end of the standard buttress thread of box cupling 1 and body 2,30; Form fluking type tooth form acme thread structure; Improved the bonding strength of screw thread; Increased the tooth form sealing performance, improved the counter-bending ability of joint simultaneously, its anti-leakage performance is increased greatly; Adopted from the direct transition of spigot surface tooth side angle at tooth form angle at thread head and be the pipe end face, increased the thickness of pipe end face, improved its incompressible load that is threaded and torque resistant performance; Increase the overall length of box cupling, improved the bonding strength and 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 (10)
1. special buttress thread tubing and casing jointing; Comprise box cupling (1) and body (2,30) through being threaded; The axial middle part of said box cupling (1) inwall is provided with the interior step cylinder (28) of ring-type; It is characterized in that: the two ends of said box cupling (1) are processed with the inclined to one side trapezoidal internal thread of standard (3); Said inclined to one side trapezoidal internal thread (3) is provided with interior sealing thread (5) near the rear end of step cylinder (28) in said; Be processed with the trapezoidal partially external screw thread of standard (4) on the outer wall of said body (2,30) end, the front end of said trapezoidal partially external screw thread (4) is provided with external seal screw thread (6), and it is the special buttress thread of negative angle that said interior sealing thread (5) adopts bearing surface tooth side angle (13) with said external seal screw thread (6).
2. according to the described special buttress thread tubing and casing jointing of claim 1, it is characterized in that: the value of said bearing surface tooth side angle (13) is-3 ° ~-10 °.
3. according to the described special buttress thread tubing and casing jointing of claim 1, it is characterized in that: sealing thread (5) is 2 ~ 5 teeth with the tooth number of said external seal screw thread (6) in said.
4. according to the described special buttress thread tubing and casing jointing of claim 3, it is characterized in that: sealing thread (5) is 2 teeth or 3 teeth with the tooth number of said external seal screw thread (6) in said.
5. according to the described special buttress thread tubing and casing jointing of claim 1; It is characterized in that: the end of the interior step cylinder of said box cupling (1) (28) is provided with internal torque shoulder (7); Said internal torque shoulder (7) is provided with recessed interior shoulder angle (22), and said interior shoulder angle (22) is near chamfering (26) in the outward-dipping formation in one side of said box cupling (1) axis; The end of said body (2,30) is provided with the outer torque shoulder (8) that matches with said internal torque shoulder (7); Said outer torque shoulder (8) is provided with the outer shoulder angle (23) of protrusion, said outer shoulder angle (23) near said body (2,30) one side sloping inwardly of axis forms outer chamfering (27).
6. according to the described special buttress thread tubing and casing jointing of claim 5; It is characterized in that: the value of shoulder angle (22) is 110 ° ~ 160 ° in said; The value of said outer shoulder angle (23) is bigger 0 ~ 2 ° than the value of shoulder angle (22) in said; The value of chamfering (26) is 10 ° ~ 60 ° in said, and the value of said outer chamfering (27) equates with the value of said interior chamfering (26).
7. according to the described special buttress thread tubing and casing jointing of claim 6, it is characterized in that: the value of said outer shoulder angle (23) than the value of shoulder angle (22) in said big 0.5 ° ~ 1 °.
8. according to the described special buttress thread tubing and casing jointing of claim 5; It is characterized in that: the distance in said between the summit of shoulder angle (22) and said interior step cylinder (28) inwall is an interior shoulder vertex distance (20), and said interior shoulder vertex distance (20) is interior shoulder thickness (18) and 1/2 of tooth depth (11) sum; Distance between the summit of said outer shoulder angle (23) and said body (2, the 30) inwall is an outer shoulder vertex distance (21), and said outer shoulder vertex distance (21) is outer shoulder thickness (19) and 1/2 of tooth depth (11) sum.
9. according to the described special buttress thread tubing and casing jointing of claim 8, it is characterized in that: said outer shoulder thickness (19) equates with said interior shoulder thickness (18), is 5 ~ 15mm.
10. according to the described special buttress thread tubing and casing jointing of claim 5, it is characterized in that: place, the summit of shoulder angle (22) is provided with inner vertex circular arc (24) in said, and the radius of said inner vertex circular arc (24) is 1.0 ~ 5.0mm; The place, summit of said outer shoulder angle (23) is provided with outer dead centre circular arc (25), the big 0.2 ~ 1.0mm of radius of the said inner vertex circular arc of the radius ratio of said outer dead centre circular arc (25) (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220181547 CN202578554U (en) | 2012-04-25 | 2012-04-25 | Special buttress thread oil sleeve connection joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220181547 CN202578554U (en) | 2012-04-25 | 2012-04-25 | Special buttress thread oil sleeve connection joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202578554U true CN202578554U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220181547 Expired - Fee Related CN202578554U (en) | 2012-04-25 | 2012-04-25 | Special buttress thread oil sleeve connection joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202578554U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720439A (en) * | 2012-06-16 | 2012-10-10 | 无锡西姆莱斯石油专用管制造有限公司 | High-tightness buttress thread sleeve joint |
| CN110529055A (en) * | 2019-08-30 | 2019-12-03 | 江苏璞腾油气装备有限公司 | A kind of high antitorque air-tight oil casing nipple |
-
2012
- 2012-04-25 CN CN 201220181547 patent/CN202578554U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720439A (en) * | 2012-06-16 | 2012-10-10 | 无锡西姆莱斯石油专用管制造有限公司 | High-tightness buttress thread sleeve joint |
| CN102720439B (en) * | 2012-06-16 | 2015-09-02 | 无锡西姆莱斯石油专用管制造有限公司 | High sealability BCSG jointing |
| CN110529055A (en) * | 2019-08-30 | 2019-12-03 | 江苏璞腾油气装备有限公司 | A kind of high antitorque air-tight oil casing nipple |
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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: 20180425 |