CN203403831U - Direct-connecting oil casing pipe threaded connector - Google Patents
Direct-connecting oil casing pipe threaded connector Download PDFInfo
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- CN203403831U CN203403831U CN201320414875.7U CN201320414875U CN203403831U CN 203403831 U CN203403831 U CN 203403831U CN 201320414875 U CN201320414875 U CN 201320414875U CN 203403831 U CN203403831 U CN 203403831U
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- 238000007789 sealing Methods 0.000 claims abstract description 32
- 239000011324 bead Substances 0.000 abstract 4
- 239000007789 gas Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000013475 authorization Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 208000010040 Sprains and Strains Diseases 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
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Abstract
The utility model relates to a direct-connecting oil casing pipe threaded connector. The direct-connecting oil casing pipe threaded connector comprises a first pipe body (1) and a second pipe body (2), wherein the first pipe body (1) and the second pipe body (2) are arranged left and right. The direct-connecting oil casing pipe threaded connector is characterized in that a first inner torque circular bead (1.1), a first inner sealing tapered surface (1.2), external threads (1.3), a first outer sealing tapered surface (1.4) and a first outer torque circular bead (1.5) are sequentially arranged on the outer surface of the right end of the first pipe body (1) from outside to inside, and a second outer torque circular bead (2.5), a second outer sealing tapered surface (2.4), internal threads (2.3), a second inner sealing tapered surface (2.2) and a second inner torque circular bead (2.1) are arranged sequentially on the inner surface of the left end of the second pipe body (2) from outside to inside. Therefore, the direct-connecting oil casing pipe threaded connector has the advantages of being good in sealing performance, high in connecting strength and strong in over torque resisting ability.
Description
Technical field
The utility model relates to a kind of oil bushing threaded connector, relates in particular to a kind of direct linkage type oil bushing threaded connector, belongs to oil pipe thread link technique field.
Background technology
Tubing and casing is the oil country tubular good of recover petroleum and natural gas, and tubing and casing is one by one threaded connection, and forms the oil casing that reaches thousands of meters.Oil casing will be born tensile load, internal gas pressure power, external pressure, bending and temperature loading etc., and stressed very harsh, wherein connecting thread is the weakest link.The tubing and casing that oil gas field is used at present, adopts API to be threaded mostly, and API screw thread is a kind of standard thread, and according to the processing of API standard and check, API screw thread is divided into again API round thread and API buttress thread.Adopt this connected mode, box cupling external diameter is greater than body external diameter, and box cupling internal diameter is also greater than internal diameter of tube body.This connected mode can meet general operational requirement, but when drilling well annular clearance hour, there is following problem: 1, little, the distortion of tubing and casing at crooked hole place of borehole gap makes to be lowered to difficulty; 2, little annular clearance causes cement sheath attenuate, and cement strength designing requirement is higher; 3, little, the easy bending of the rigidity of little gap sleeve, bias and adherent, decline displacement efficiency; 4, flow resistance obviously increases during cementing job, and operation pressure is high, easily sprains stifled or misses.For API screw thread, although box cupling only accounts for a very little part for whole tubing string length, because box cupling external diameter is greater than tube outer diameter, make in the well cementation gap at box cupling position very little.Therefore need to use special nipple just can address this problem.
Find by prior art documents, Chinese patent notice of authorization number is CN 2386183 Y, and notice of authorization day is on July 5th, 2000, and utility model patent name is called " direct connecting type oil casing pipe ", and this patent is improved above-mentioned API screw thread.This utility model is a kind of direct connecting type oil casing pipe, and it comprises: body and have internal thread and the externally threaded part that is threaded, and the D outer diameter m of the part that is threaded is greater than body D outer diameter, and the profile of tooth of the described part that is threaded is complete buckle-shaped.The screw initial thread end of internal thread and externally threaded screw thread disappear to hold anti-torque shoulder, and screw thread is more than 2 or 2 changing values along diametric tapering, and body D outer diameter is less than 5 inches.This joint does not have box cupling, compares with API screw thread, and the external diameter of joint obviously reduces, and annular clearance is increased, and cementing quality improves.But also there is following problem in this structure: the external diameter of the part that 1, is threaded is still greater than body external diameter, does not meet some drilling well requirement; 2, only have a torque shoulder, anti-torque capability is poor excessively; 3, there is no metal/metal hermetically-sealed construction, sealing effectiveness is bad, does not especially possess hermetic seal ability.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of good seal performance is provided, and bonding strength is higher, the anti-strong direct linkage type oil bushing threaded connector of torque capability of crossing.
The purpose of this utility model is achieved in that
A kind of direct linkage type oil bushing threaded connector, it comprises the first body and the second body that left and right is arranged, the right-hand member external surface of described the first body is disposed with the first internal torque shoulder from outside to inside, the first interior sealing cone, external screw thread, the first external seal conical surface and the first outer torque shoulder, the left end inner surface of described the second body is disposed with the second outer torque shoulder from outside to inside, the second external seal conical surface, internal thread, the second interior sealing cone and the second internal torque shoulder, the right-hand member external surface of described the first body and the left end inner surface of the second body screw up mutually, the first outer torque shoulder contacts with the second outer torque shoulder, the first internal torque shoulder contacts with the second internal torque shoulder, the first interior sealing cone, the first external seal conical surface and external screw thread respectively with the second interior sealing cone, the second external seal conical surface and internal thread form interference fit.
As a kind of preferred, the external diameter of the first body and the second body, internal diameter are identical with external diameter, the internal diameter of its joint, the bore hole internal diameter of female end is d1, and corresponding male end face of cylinder external diameter is d2, and the two meets following relation: d1-d2=0.4～0.6mm.
As a kind of preferred, the joint overall length of the second body is that L1, the second body outer face are that N1, bore hole length are M1 to internal thread right-hand member distance; The joint overall length of the first body is that L2, the second outer torque shoulder for N2, nose length are M2, meet following relation: L1=L2, N1-N2=1.2～2.4mm, M1=M2=10～12mm to external screw thread right-hand member distance between above parameter.
As a kind of preferred, the reverse shoulder that the first outer torque shoulder and the second outer torque shoulder are angle [alpha], α=15～20 °, the first internal torque shoulder and the second internal torque shoulder are right angle shoulder, the first external seal conical surface and the second external seal conical surface are β with axial angle, the first interior sealing cone and the second interior sealing cone are θ with axial angle, β=25～30 °, θ=5～10 °.
As a kind of preferred, external screw thread and internal thread are taper thread, tapering 1:10～1:16, and the profile of tooth of screw thread is barb-shaped, tooth depth 0.8mm～1.2mm, 30～45 ° of spigot surface angles, bearing surface angle-3～-15 °.
Compared with prior art, the beneficial effects of the utility model are:
1, screw thread adopts fluking type screw thread, and joint efficiency is high.
2, the inside and outside footpath of connecting thread is completely concordant with the inside and outside footpath of body, is lowered to conveniently in Oil/gas Well.
3, have inside and outside two torque shoulder, anti-torque capability is strong excessively.
Therefore this direct linkage type oil bushing threaded connector has good seal performance, and bonding strength is higher, the anti-strong advantage of torque capability of crossing.
Accompanying drawing explanation
Fig. 1 is the utility model direct linkage type oil bushing threaded connector structural representation.
Fig. 2 is the second body internal thread place structural representation of the utility model direct linkage type oil bushing threaded connector.
Fig. 3 is the first body external screw thread place structural representation of the utility model direct linkage type oil bushing threaded connector.
Wherein:
The first body 1, the interior sealing cone 1.2 of the first internal torque shoulder 1.1, first, external screw thread 1.3, the outer torque shoulder 1.5 of the first external seal conical surface 1.4, first
The second body 2, the interior sealing cone 2.2 of the second internal torque shoulder 2.1, second, internal thread 2.3, the outer torque shoulder 2.5 of the second external seal conical surface 2.4, second.
The specific embodiment
Referring to Fig. 1 ~ Fig. 3, a kind of direct linkage type oil bushing threaded connector that the utility model relates to, it comprises the first body 1 and the second body 2 that left and right is arranged, the right-hand member external surface of described the first body 1 is disposed with the first internal torque shoulder 1.1 from outside to inside, the first interior sealing cone 1.2, external screw thread 1.3, the first external seal conical surface 1.4 and the first outer torque shoulder 1.5, the left end inner surface of described the second body 2 is disposed with the second outer torque shoulder 2.5 from outside to inside, the second external seal conical surface 2.4, internal thread 2.3, the second interior sealing cone 2.2 and the second internal torque shoulder 2.1, the left end inner surface of the right-hand member external surface of described the first body 1 and the second body 2 screws up mutually, after tightening, the first outer torque shoulder 1.5 contacts with the second outer torque shoulder 2.5, the first internal torque shoulder 1.1 contacts with the second internal torque shoulder 2.1, share torque wrench moment simultaneously, and play auxiliary seal effect.The first interior sealing cone 1.2 and the second interior sealing cone 2.2 form interference fit, can prevent that internal flow (comprising oil and natural gas) from leaking into body outside, the first external seal conical surface 1.4 and the second external seal conical surface 2.4 also form interference fit, can prevent that external fluid from leaking in body.Meanwhile, external screw thread 1.3 also forms interference fit with internal thread 2.3, mainly provides joint enough bonding strengths, plays the function of connection.
The utility model screw thread is directly processed on body, and pier bulk processing is not carried out at body two ends, and the external diameter of body, internal diameter are identical with external diameter, the internal diameter of joint, are respectively D and d.Come from the appearance, just as joint does not exist, thereby guaranteed the maximal clearance of body.The bore hole internal diameter of female end is d1, and corresponding male end face of cylinder external diameter is d2, and the two meets following relation: d1-d2=0.4～0.6mm.After joint is connected, at this position, form a cavity, can store unnecessary thread compound, keep the contact of the first external seal conical surface 1.4 and the second external seal conical surface 2.4 sealings, be conducive to improve gas sealing ability.
The screw thread overall length of the utility model female end be L1(the joint overall length of the second body be L1), the second body outer face is that N1, bore hole length are M1 to internal thread right-hand member distance; The screw thread overall length of male end be L2(the joint overall length of the first body be L2), the second outer torque shoulder is that N2, nose length are M2 to external screw thread right-hand member distance.Between these parameters, meet following relation: L1=L2, N1-N2=1.2～2.4mm, M1=M2=10～12mm.L1=L2 can be so that inside and outside shoulder comes in contact simultaneously, N1 > N2 guaranteed the reasonable engagement of internal and external threads, M1=M2=10～12mm can be so that can there is larger elastic deformation in nose herein and bore hole face, favourable to sealing.
The reverse shoulder that the first outer torque shoulder 1.5 and the second outer torque shoulder 2.5 are angle [alpha], α=15～20 °, oppositely shoulder and the external seal conical surface form a wedge shape, are conducive to improve hermetic seal ability in the situation that crossing moment of torsion.The first internal torque shoulder 1.1 and the second internal torque shoulder are 2.1 right angle shoulders, be convenient to measure and location, the first external seal conical surface 1.4 and the second external seal conical surface 2.4 are β with axial angle, the first interior sealing cone 1.2 and the second interior sealing cone 2.2 are θ with axial angle, β=25～30 °, θ=5～10 °, different sealing taperings makes the contact on the conical surface distribute more even.
External screw thread 1.3 is taper thread with internal thread 2.3, tapering 1:10～1:16, and the profile of tooth of screw thread is barb-shaped, tooth depth 0.8mm～1.2mm, 30～45 ° of spigot surface angles, bearing surface angle-3～-15 °.Lower tooth depth and barb-shaped screw thread have reduced the radial component that joint produces under Axial Loads to greatest extent, have improved to greatest extent the joint efficiency of joint.
Embodiment mono-
This joint is for the oil pipe of 88.9 * 7.34mm, and grade of steel is P110.The external diameter of body is 88.9mm, and internal diameter is 74.22mm, and wall thickness is 7.34mm.The yield strength σ s=758Mpa of material, tensile strength is σ b=862Mpa.The external diameter of joint, internal diameter are identical with body.Screw thread overall length L1=L2=80mm, M1=M2=12mm, N1=68mm, N2=66mm, the height of internal and external screw thread is 1.0mm, spigot surface angle 450, bearing surface angle-150, internal and external screw thread all carries out phosphatization processing.This product bonding strength reaches 784kN, and hermetic seal ability reaches 109MPa, goes up, unloads performance and can reach on 5 times, unload and not thread gluing.
Embodiment bis-
This joint is for the sleeve pipe of 177.8 * 11.51mm, and grade of steel is Q125.The external diameter of body is 177.8mm, and internal diameter is 154.78mm, and wall thickness is 11.51mm.The yield strength σ s=862Mpa of shell material, tensile strength is σ b=946Mpa.The external diameter of joint, internal diameter are identical with body.Screw thread overall length L1=L2=109.5mm, M1=M2=12mm, N1=97.5mm, N2=95.5mm, the height of internal and external screw thread is 1.0mm, spigot surface angle 450, bearing surface angle-150, internal and external screw thread all carries out phosphatization processing.This product bonding strength reaches 3110kN, and hermetic seal ability reaches 98MPa, goes up, unloads performance and can reach on 5 times, unload and not thread gluing.
Claims (7)
1. a direct linkage type oil bushing threaded connector, it comprises the first body (1) and the second body (2) that left and right is arranged, the right-hand member external surface that it is characterized in that described the first body (1) is disposed with the first internal torque shoulder (1.1) from outside to inside, the first interior sealing cone (1.2), external screw thread (1.3), the first external seal conical surface (1.4) and the first outer torque shoulder (1.5), the left end inner surface of described the second body (2) is disposed with the second outer torque shoulder (2.5) from outside to inside, the second external seal conical surface (2.4), internal thread (2.3), the second interior sealing cone (2.2) and the second internal torque shoulder (2.1), the left end inner surface of the right-hand member external surface of described the first body (1) and the second body (2) screws up mutually, the first outer torque shoulder (1.5) contacts with the second outer torque shoulder (2.5), the first internal torque shoulder (1.1) contacts with the second internal torque shoulder (2.1), the first interior sealing cone (1.2), the first external seal conical surface (1.4) and external screw thread (1.3) respectively with the second interior sealing cone (2.2), the second external seal conical surface (2.4) and internal thread (2.3) form interference fit.
2. a kind of direct linkage type oil bushing threaded connector according to claim 1, the external diameter, the internal diameter that it is characterized in that the first body (1) and the second body (2) are identical with external diameter, the internal diameter of its joint, the bore hole internal diameter of female end is d1, corresponding male end face of cylinder external diameter is d2, and the two meets following relation: d1-d2=0.4～0.6mm.
3. a kind of direct linkage type oil bushing threaded connector according to claim 1 and 2, the joint overall length that it is characterized in that the second body (2) be L1, the second body (2) outer face to internal thread right-hand member distance for N1, bore hole length be M1; The joint overall length of the first body (1) is that L2, the second outer torque shoulder for N2, nose length are M2, meet following relation: L1=L2, N1-N2=1.2～2.4mm, M1=M2=10～12mm to external screw thread right-hand member distance between above parameter.
4. a kind of direct linkage type oil bushing threaded connector according to claim 1 and 2, it is characterized in that the first outer torque shoulder (1.5) and the second outer torque shoulder (2.5) are the reverse shoulder of angle [alpha], α=15～20 °, the first internal torque shoulder (1.1) is (2.1) right angle shoulder with the second internal torque shoulder, the first external seal conical surface (1.4) and the second external seal conical surface (2.4) are β with axial angle, the first interior sealing cone (1.2) and the second interior sealing cone (2.2) are θ with axial angle, β=25～30 °, θ=5～10 °.
5. a kind of direct linkage type oil bushing threaded connector according to claim 3, it is characterized in that the first outer torque shoulder (1.5) and the second outer torque shoulder (2.5) are the reverse shoulder of angle [alpha], α=15～20 °, the first internal torque shoulder (1.1) is (2.1) right angle shoulder with the second internal torque shoulder, the first external seal conical surface (1.4) and the second external seal conical surface (2.4) are β with axial angle, the first interior sealing cone (1.2) and the second interior sealing cone (2.2) are θ with axial angle, β=25～30 °, θ=5～10 °.
6. a kind of direct linkage type oil bushing threaded connector according to claim 1 and 2, it is characterized in that external screw thread (1.3) and internal thread (2.3) are taper thread, tapering 1:10～1:16, the profile of tooth of screw thread is barb-shaped, tooth depth 0.8mm～1.2mm, 30～45 ° of spigot surface angles, bearing surface angle-3～-15 °.
7. a kind of direct linkage type oil bushing threaded connector according to claim 3, it is characterized in that external screw thread (1.3) and internal thread (2.3) are taper thread, tapering 1:10～1:16, the profile of tooth of screw thread is barb-shaped, tooth depth 0.8mm～1.2mm, 30～45 ° of spigot surface angles, bearing surface angle-3～-15 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320414875.7U CN203403831U (en) | 2013-07-12 | 2013-07-12 | Direct-connecting oil casing pipe threaded connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320414875.7U CN203403831U (en) | 2013-07-12 | 2013-07-12 | Direct-connecting oil casing pipe threaded connector |
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| Publication Number | Publication Date |
|---|---|
| CN203403831U true CN203403831U (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320414875.7U Expired - Fee Related CN203403831U (en) | 2013-07-12 | 2013-07-12 | Direct-connecting oil casing pipe threaded connector |
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| CN (1) | CN203403831U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075048A (en) * | 2014-06-20 | 2014-10-01 | 聊城安泰石油机械有限公司 | Connection type direct connecting buckle for petroleum and mine pipelines |
| US10184596B2 (en) | 2014-12-05 | 2019-01-22 | China National Petroleum Corporation | Connection structure between pipe body and joint of aluminum alloy drill pipe |
| CN112879087A (en) * | 2021-03-12 | 2021-06-01 | 攀枝花贝氏体耐磨管道有限公司 | Direct-connection type filling sleeve |
-
2013
- 2013-07-12 CN CN201320414875.7U patent/CN203403831U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075048A (en) * | 2014-06-20 | 2014-10-01 | 聊城安泰石油机械有限公司 | Connection type direct connecting buckle for petroleum and mine pipelines |
| US10184596B2 (en) | 2014-12-05 | 2019-01-22 | China National Petroleum Corporation | Connection structure between pipe body and joint of aluminum alloy drill pipe |
| CN112879087A (en) * | 2021-03-12 | 2021-06-01 | 攀枝花贝氏体耐磨管道有限公司 | Direct-connection type filling sleeve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20140712 |
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| EXPY | Termination of patent right or utility model |