IE54076B1 - New joint for steel pipe which is oil tight at high pressure and insensitive to the phenomenon of seizure - Google Patents
New joint for steel pipe which is oil tight at high pressure and insensitive to the phenomenon of seizureInfo
- Publication number
- IE54076B1 IE54076B1 IE333/83A IE33383A IE54076B1 IE 54076 B1 IE54076 B1 IE 54076B1 IE 333/83 A IE333/83 A IE 333/83A IE 33383 A IE33383 A IE 33383A IE 54076 B1 IE54076 B1 IE 54076B1
- Authority
- IE
- Ireland
- Prior art keywords
- joint
- sealing surfaces
- sealing
- contact
- sealing surface
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 9
- 239000010959 steel Substances 0.000 title claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 86
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 241000220450 Cajanus cajan Species 0.000 claims 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
- F16L15/004—Screw-threaded joints; Forms of screw-threads for such joints with conical threads with axial sealings having at least one plastically deformable sealing surface
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/0423—Threaded with plural threaded sections, e.g. with two-step threads
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Gasket Seals (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Seal Device For Vehicle (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Earth Drilling (AREA)
- Sealing Material Composition (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Heat Treatment Of Articles (AREA)
- External Artificial Organs (AREA)
- Press Drives And Press Lines (AREA)
- Measuring Fluid Pressure (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Steroid Compounds (AREA)
Abstract
The invention relates to a joint for steel pipe, which is oil-tight at high pressure, being of the type including at least one pair of slightly conical sealing surfaces arranged at at least one end of the male member or of the female member, and is insensitive to seizure. This joint is characterized by the fact that the first contact 5 of the sealing zone lying at the end of one member occurs against the corresponding sealing surface of the other member and that at the time of this first contact the taper of the sealing surface which is situated at the end of one of the members of the joint is less than the taper of the corresponding sealing surface which is situated on the other member of the joint, the sealing surfaces at the time of tightening the joint, becoming applied against one another with a contact pressure sufficient to ensure oiltightness. <IMAGE>
Description
The present Invention relates to a new joint for steel pipes and 1n particular for pipes Intended for the oil Industry. The Invention refers store especially to joints In which olltlghtness 1s ensured by pairs of sealing surfaces of slightly conical shape which cone Into contact with one another upon tightening up the joint.
In this known type of jolntthere Is employed on the male Maher a sealing surface the dlaMter of which Is slightly greater than the corresponding dlaMter of the sealing surface on the female meafcer, so that at the tlM of tightening up the joint high contact pressures are exerted between the two sealing surfaces, these being pressures which oust be sufficient to ensure olltlghtness under the highest pressure which the assembly of pipes must withstand.
Known joints of this type may Include only one pair of sealing surfaces, situated either at the end of the male merter or at the end of the female member. They may equally well Include two pairs of sealing surfaces arranged on opposite sides of the threads which are respectively on the end of the male member and on the end of the female member.
Furthermore the conditions of exploitation of oil fields are at present sueh that one 1s led to collect the petroleua at greater and greater depths, which Mkes It essential to achieve joints which remain olltlght at working pressures which may exceed 1,000 kg/cm . -25' 4 ο ο Again 1t my likewise happen that one Is led to exploit oil fields at great depth, which contain high contents of corrosive agents such as sulpheretted hydrogen or carbon dioxide, and that one 1s obliged to employ stainless steels containing chromium nickel as well as other additive elements. These two requirements which are met more and more often simultaneously cause the joints which are known at present, not to give satisfaction. That Is, the stainless steels the employment of which Is necessary 1n order to be able to withstand corrosive agents have a natural tendency to seizure which becomes considerably Increased by the necessity of· employing high contact pressures at the level of the metal sealing surfaces.
This Is the reason why the only joints known today which enable this problem to be solved, Include very steeply Inclined sealing surfaces ( of the order of 30°) with respect to the axis of the pipe, a stop for restricting screwing up Immediately becoming opposed to further screwing as soon as contact has been obtained at the level of the sealing surfaces. It will be understood that this type of joint 1s difficult to put Into use and to machine, because the stop for restricting screwing up must be positioned extremely precisely with respect to the steeply conical sealing surfaces.
The present Invention relates to a metal-to-metal oiltight joint which Includes slightly conical sealing surfaces and which Is olltlght at high pressures without there being any risk of giving rise to seizure phenomena even when these joints are produced from steel or from steel which 1s stainless or heavily loaded with chromium, with nickel and with other additive elements. -3According to the present Invention 1s a joint for pipes, especially of steel alloy, which 1s olltlght at high pressure, being the type Including at least one pair of slightly conical sealing surfaces arranged at at least one end of the Mie member or of the feMle aenber, In which pair the first contact of the sealing zone lying at the end of one aeaber occurs against the corresponding sealing surface of the other member, 1n which at the time of this first contact the taperof the sealing surface which 1s situated at the end of one of the rnembeis of the joint 1s less than the taper of the corresponding sealing surface which 1s situated on the other aeaber of the joint, the generatrices of said pair of conical sealing surfaces having an angular difference which corresponds with a slope of 0.5 to 2Ϊ, the sealing surfaces at the tlae of tightening the joint, becoalng applied as a whole against one another with a contact pressure sufficient to ensure olltlghtness, the said joint being Insensitive to seizure.
Tests which have been Mde by the Applicant Company have revealed that for a reason which 1t has been been possible to determine with certainly, the joints which exhibit the characteristics which have just been defined above, may be screwed up to apply the sealing surfaces against one another with very high pressures without harmful seizure occurring and with satisfactory olltlghtness and with preservation of the good quality of these surfaces, this being even when the members of the joint are produced from steel or alloy heavily loaded with chromium, nickel and other adddltlve elements and consequently having a particular propensity to seizure. -45 4 Ο 7 6 Preferably the angular difference between the generatrices of the two sealing surfaces 1s the greater, the lower the ratio of thickness to dlaaeter of the pipes.
In accordance with the Invention the joint advantageously 5 includes a stop for restricting screwlpg-up so that excessive tightening does not engage the wale aeaber too deeply 1n the feaale aeaber, so exceeding uselessly the necessary contact pressures between the sealing surfaces and risking 1apa1r1ng thea.
The present Invention aay be eaployed on joints having taper 10 threads or cylindrical threads. It aay likewise be eaployed on joints which include only one pair of sealing surfaces or on those which include two pairs of sealing surfaces arranged one at the end of the aale aeaber and the other at the end of the feaale aeaber on opposite sides of the threads.
With the ala of letting the Invention be better understood, there will now be described by way of Illustration and without any restrictive character, a number of eabodlaents given by way of exaaple and represented 1n the drawings 1n which: Figure 1 1s a dlagraaaatlc section showing how the first contact of the sealing zone lying at the end of one of the members aust occur againtt the conical sealing surface on the other aeaber; Figure 2 corresponds with Figure 1 but In the case in which the first contact does not occur in accordance with the Invention: Figures 3 and 4 represent dlagranaatlcally the differences In disaster which the pairs of sealing surfaces aust -55 4 0 7 6 exhibit In order that the first contact shall occur 1n accordance with the Invention; Figures 5 and 6 represent diagrammatically a joint 1n accordance with the Invention in which the sealing surfaces are situated at the end of the female member; Figures 7 and 8 represent dlagramtically a joint 1n accordance with the invention in which the sealing surfaces are situated at the end of the male member; Figures 9 and 10 represent diagrammatically a joint having a 10 double cylindrical thread and 1n accordance with the Invention, 1n which the sealing surfaces are situated at the end of the male member; Figures 11 and 12 represent a joint 1n accordance with the Invention equipped with a frustoconical thread and two pairs of sealing surfaces situated at the end of the female member; Figures 13, 14 and 15 represent a joint In accordance with the invention equipped with a frustoconical thread and Including a first pair of sealing surfaces at the end of the female member and a second pair of sealing surfaces 1n the vicinity of the end of the male member.
In Figure 1 there 1s shown diagrammatically how the first 20 contact must occur between two sealing surfaces of a joint In accordance with the invention.
In the embodiment shown in Figure 1 the sealing is effected at the end of the male member. In this Figure are found the male member 1, the female member 2, the frustoconical sealing surface 3 of the Bale member 1 and the frustoconical sealing surface 4 of the female member 2. In accordance with the Invention the first contact between -65 4 0 7 6 the sealing zone at the end of the male member and the sealing furface on the female member must take place on the frustocontcal surface 4 of the female member 2 as 1s seen shorn at 5 1n Figure 1.
In Figure 2 1s shown the way In which on the contrary the first contact occurs between the end of the male member and the female member In a manner which Is not In accordance with the Invention. In this case the point of first contact 5 Is not situated on the frustoconlcal sealing surface 4 of the feamle member but on the zone which connects this frustoconlcal surface with the thread.
In Figure 3 the portions are shown again which concern the sealing of the joint as Figure 1. The point 6 has likewise been plotted which 1s the end of the theoretical line of the generatrix of the conical surface 3 of the male member 1 as well as the point 7 which is the theoretical end of the generatrix of the frustum of the cone of the sealing surface 4 of the female member 2.
In order that the condition 1n accordance with the Invention represented in Figure 1 shall be achieved 1t 1s sufficient that the diameter M of the male member at the point 6 1s slightly less than the diameter 02 of the female member at the point 7.
It will be understood that under these conditions the first contact of the male member occurs against the frustoconlcal sealing surface 4 of the female member.
In Figure 4 the case shown In which the sealing 1n accordance with the Invention occurs at the end of the female member 8, the male member being shown diagrammatically at 9.
The end point of the theoretical line of the generatrix °f the frustoconlcal sealing surface 10 of the female member 1s shown -75 4 0 7 6 at 12 whereas the corresponding point of the theoretical line of the generatrix of the frustoconical surface 11 of the Mie member 1s shown at 13. In order that the condition 1n accordance with the Invention shall be achieved 1t is sufficient that the diameter DH corresponding with the point 13 shall be slightly less than the dlamter D'2 corresponding with the point 12.
It goes without spying that both 1n the case of Figure 3 and In that of Figure 4 the difference existing between the 'diameters Dl, D2 and DH, D'2 mist be sufficiently smII to enable a force fit of the two sealing surfaces Into one another 1n order to obtain the contact pressure necessary to the olltlghtness which 1t is desired to Impart to them.
In Figure 5 a joint 1n accordance with the Invention 1s shown, in which the sealing surfaces are situated on the outside of the pipe at the end of the female member 8. The thread 14 1s shown dlagramaetlcally, which enables the assembly of the two tubular members as well as the stop 15 created Inside the female member, against which the end of the Mie member comes to bear 1n order to avoid excessive screwing up of the joint.
Figure 6 repeats on a larger scale the portion VI from Figure . It represents the joint at the Instant at which the end of the feMle member 8 comes Into contact at 5 with the frustoconical sealing surface 11 of the Mie member 9 In accordance with one of the characteristics of the Invention.
In Figure 6 there are shown at Al^ and A2 the angles which the generatrices of the frustoconical sealing surfaces 11 of the Mie member 9 and 10 of the feMle member 8, Mke with respect to the axis of the pipe. -85 4 0 7 6 In accordance with the Invention the slope te of the sealing surface 10 which lies at the end of the female member 8 1s less than the slope of the sealing surface 11 on the male member 9 which Is separated from the end of the male member by the whole length of the threads 14. That Is shown 1n Figure 6 by the fact that the angle Al. Is greater than the angle te, which at the time at which first contact occurs at 5, leaves between the two sealing surfaces 10 and 11 an angle B equal to Αχ - te.
It 1s clear that when screwing up 1s continued so that the end of the male member 9 comes Into contact with the stop 15, this angular difference B tends progressively towards zero, the sealing surface 10 of the female member becoming completely applied against the sealing surface 11 of the male member.
In Figure 7 an embodiment of the Invention 1s shown 1n which the sealing occurs Inside the joint at the end of the male member 1 which at the end of tightening up comes to bear against the stop 15 for restriction of screwing up, which Is situated on the female member 2.
As may be seen In Figure 8 which represents on a larger scale the portion VIII from Figure 7, the first contact of the male member occurs at 5 against the frustoconical sealing surface 4 of the female member 2.
As has been shown on the drawing and In accordance with the Invention the angle Al. which the generatrix of the sealing surface 3 which Is at the end of the male menber 1, makes with the axis of the pipe, Is less than the angle te which the generatrix of the surface 4 of the female member, makes with the axis of the pipe, -95 4 0 7 6 the difference A2 - Al. being represented by the angle jl .
In this case likewise, of course, when the joint has been tightened up and the end of the male member 1 has come to bear against the stop for restriction of screwing up 15, the surfaces 3 and 4 are applied against one another along their whole length with the contact pressure which 1s sufficient to ensure olltlghtness even at high pressures.
In Figure 9 1s shown, half 1n axial section, a joint 1n accordance with the Invention in the state screwed home, which Includes a g cylindrical thread 14 having two stages, a stop for restriction of screwing up 15 arranged at the end of the male member 1 and a sealing zone arranged at the end of the male member and consisting of the sealing surface 3 on the male member 1 and the sealing surface 4 on the female member 2.
In Figure 10 on a larger scale the portions of the male members 1 and 2 are shown, which surround the sealing zone.
As Indicated 1n Figure 10 and In accordance with the Invention the slope of the surface 3 of the male member Is less than the slope of the surface 4 of the' female «ember .2. 2o In the embodiment shown and with a pipe of which the outer diameter 1s 180 millimetres and the thickness 9 millimetres, produced from a steel having a chromium content higher than 20X the slope of the sealing surface 3 on the male member, represented by the angle Al_ 1s equal to 4.25X whereas the slope of the surface 4 of the female member represented by the angle A2 1s equal to 5t which 1n -105 4 0 7 6 accordance with the Inventloncorresponds before tightening up, to a difference of angular slope 0.75X.
In Figure 11 a particular embodiment of the Invention 1s shown, which Includes a joint having a frustoconical thread with sealing surfaces arranged at the end of the female member, which likewise includes a stop 15 for restriction of screwing up, against which the end of the female member 8 comes to bear.
As may be seen In Figure 12, the slope of the sealing surface 10 on the female member 8, which 1s represented by the angle A2 1$ equal to 24X, whereas the slope of the sealing surface 11 on the male member 9 Is represented by the angle Αχ which 1s equal to 25X.
In accordance with the Invention the slope of the surface 10 which Is at the end of the female member 8 1s less by IX than the slope of the sealing surface 11 on the male member.
Finally 1n Figure 13 an embodiment is shown, of a joint in accordance with the Invention which Include two sealing zones arranged respectively at the end of the male member 1 and at the end of the female member 2.
In Figures 14 and 15 these two sealing zones are shown on a larger scale.
In Figure 14 may be seen the slopes A'X and K'2 of the sealing surfaces 11 and 10 and 1n Figure 15 the slopes AM and AM of the sealing surfaces 3 and 4. In accordance with the Invention AM corresponds with a slope of 25X (or 14 degrees), A'2 corresponds with a slope of 24X (or 13.5 degrees) and Α**χ corresponds with a slope of 5.25X (or 3 degrees) and AM corresponds with a slope of 6X (or 3.5 degrees). -11a 4 ϋ 7 6 It will be observed that the difference 1n angular slope 1s equal to lt In the case of Figure 14 and that 1n the case of Figure 15 1t Is equal to 0.75Ϊ.
In both cases 1n accordance with the Invention 1t 1s the 5 sealing surfaces which are situated at the end of a member (10 1n Figure 14 and 3 In Figure 15) which have the smaller tapers.
It 1s quite clear that the embodiments which have been described above are Indicated only by way of example and that they might be modified without thereby departing from the scope of the Invention.
In particular the Invention nay be applied to any pipe and Is not restricted to certain grades of steel.
Claims (8)
1. A joint for pipes especially of steel or alloy, which 1s olltlght at high pressure, being of the type Including at least one pair of slightly conical sealing surfaces arranged at at least 5 one end of the male member or of the female member, 1n which pair the first contact of the sealing zone lying at the end of one member occurs against the corresponding sealing surface of the other member, 1n which at the time of this first contact the taper of the sealing surface which Is situated at the end of one of the members of 10 the joint 1s less than the taper of the corresponding sealing surface which Is situated on the other member of the joint, the generatrices of said pair of conical sealing surfaces having an angular difference which corresponds with a slope of 0.5 to 22, the sealing surfaces at the time of tightening the joint, becoming applied as a whole 15 against one another with a contact pressure sufficient to ensure olltlghtness, the said joint being Insensitive to seizure.
2. A joint as in claim 1, 1n which the angular difference corresponds with a slope of about 0.75 to IX.
3. A joint as claimed 1n claim 1 or claim 2, which Includes 20 a stop for restricting screwing up, which restricts tightening of the joint as soon as the necessary pressures have been obtained between the various points on the sealing surfaces.
4. A joint as claimed 1n any one of the preceding claims, which has taper threads. -135 4 0 7 6
5. A joint as claimed 1n any one of the dales 2 and 3 and which has cylindrical threads.
6. A joint as claimed 1n one of the claims 1 to 5, which Includes two pairs of sealing surfaces arranged one at the end of 5 the male member and the other at the end of the female member on opposite sides of the threads.
7. A joint as claimed 1n any one of the preceding claims 1n which the angular difference between the generatrices of the two sealing surfaces 1s the greater, the lower the ratio of 10 thickness to the diameter of the pipes.
8. A joint for pipes substantially as described herein with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8202697A FR2521675A1 (en) | 1982-02-18 | 1982-02-18 | NEW SEAL FOR STEEL TUBES SEALED WITH HIGH PRESSURES AND LITTLE SENSITIVE TO THE PHENOMENON OF GRIPPING |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE830333L IE830333L (en) | 1983-08-18 |
| IE54076B1 true IE54076B1 (en) | 1989-06-07 |
Family
ID=9271115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE333/83A IE54076B1 (en) | 1982-02-18 | 1983-02-17 | New joint for steel pipe which is oil tight at high pressure and insensitive to the phenomenon of seizure |
Country Status (25)
| Country | Link |
|---|---|
| EP (1) | EP0089253B1 (en) |
| JP (1) | JPS58152994A (en) |
| AT (1) | ATE21542T1 (en) |
| AU (1) | AU560228B2 (en) |
| BR (1) | BR8300752A (en) |
| CA (1) | CA1214481A (en) |
| CS (1) | CS258111B2 (en) |
| DD (1) | DD207748A5 (en) |
| DE (2) | DE89253T1 (en) |
| DK (1) | DK154173C (en) |
| DZ (1) | DZ508A1 (en) |
| EG (1) | EG16454A (en) |
| ES (1) | ES278066Y (en) |
| FR (1) | FR2521675A1 (en) |
| GB (1) | GB2116276B (en) |
| GE (1) | GEP19970670B (en) |
| HK (1) | HK5987A (en) |
| IE (1) | IE54076B1 (en) |
| IN (1) | IN159012B (en) |
| MX (1) | MX156310A (en) |
| MY (1) | MY8700267A (en) |
| NO (1) | NO162167C (en) |
| NZ (1) | NZ203320A (en) |
| SG (1) | SG88386G (en) |
| SU (1) | SU1602403A3 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5423579A (en) * | 1983-01-17 | 1995-06-13 | Hydril Company | Tubular coupling with metal to metal seal |
| US4629224A (en) * | 1983-04-26 | 1986-12-16 | Hydril Company | Tubular connection |
| JPS60116994A (en) * | 1983-11-29 | 1985-06-24 | 川崎製鉄株式会社 | Coupling structure of tapered screw for pipe |
| GB8617827D0 (en) * | 1986-07-22 | 1986-08-28 | British Steel Corp | Joints for tubular members |
| US4736967A (en) * | 1986-12-04 | 1988-04-12 | The Hydril Company | Tubular pin configuration to prevent galling while ensuring sealing |
| US6070912A (en) * | 1989-08-01 | 2000-06-06 | Reflange, Inc. | Dual seal and connection |
| US5498035A (en) * | 1990-01-19 | 1996-03-12 | Blose; Thomas L. | Pipe coupling |
| US5330239A (en) * | 1990-01-19 | 1994-07-19 | Ipsco Enterprises Inc. | Pipe coupling |
| US5468029A (en) * | 1990-01-19 | 1995-11-21 | Ipsco Enterprises Inc. | Pipe coupling |
| JP3057857B2 (en) * | 1991-11-08 | 2000-07-04 | 日本鋼管株式会社 | High torque tool joint |
| IT1272733B (en) * | 1993-10-19 | 1997-06-26 | Agip Spa | COMPLETE JUNCTION PERFECTED BY TWO PIPES |
| GB2323145B (en) * | 1995-02-22 | 1999-09-22 | Victaulic Plc | A process for forming a pipe joint |
| US6024646A (en) * | 1997-10-02 | 2000-02-15 | Ipsco Enterprises Inc. | Swaged pin end of pipe connection |
| EP0949441A4 (en) * | 1997-10-08 | 2006-09-06 | Sumitomo Metal Ind | Screw joint for oil well pipes and method of manufacturing same |
| CN1651712A (en) * | 2000-03-30 | 2005-08-10 | 住友金属工业株式会社 | Slim type oil well pipe fitting |
| EP1323971A1 (en) * | 2001-12-12 | 2003-07-02 | Maria Agnese Franchini | Modular tubular element for manufacturing ducts for gases |
| US7690697B2 (en) * | 2007-05-09 | 2010-04-06 | Gandy Technologies Corp. | Thread form for tubular connections |
| FR2917805B1 (en) * | 2007-06-25 | 2009-09-04 | Vallourec Mannesmann Oil & Gas | ANTAGONIST THREADED THREADED COMPONENT ELEMENT AND CORRESPONDING TUBULAR THREADED SEAL |
| FR2961576B1 (en) * | 2010-06-17 | 2012-08-03 | Vallourec Mannesmann Oil & Gas | THREADED JOINT AND METHOD OF MAKING |
| FR2984395B1 (en) * | 2011-12-19 | 2013-12-27 | Vallourec Mannesmann Oil & Gas | TUBULAR COMPONENT FOR DRILLING AND OPERATING HYDROCARBON WELLS AND RESULTING THREAD |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2154037A (en) * | 1936-08-15 | 1939-04-11 | Nat Supply Co | Method of making joints |
| US2258066A (en) * | 1940-03-11 | 1941-10-07 | Youngstown Sheet And Tube Co | Pipe joint |
| FR58553E (en) * | 1947-09-04 | 1954-01-27 | Cie De Pont A Mousson | Screw joint for pipes |
| FR972216A (en) * | 1948-09-23 | 1951-01-26 | Hughes Tool Co | Sealed junction device for rotary well drilling rod |
| DE2438387C3 (en) * | 1974-08-07 | 1978-03-09 | Mannesmannroehren-Werke Ag, 4000 Duesseldorf | Threaded connection for oilfield pipes |
| FR2367322A1 (en) * | 1974-10-31 | 1978-05-05 | Denoe Ginette | Automatic mail sorting system coding grid - consists of five columns of ten digits with individual digits erased to make code |
| JPS5211767A (en) * | 1975-07-17 | 1977-01-28 | Matsushita Electric Ind Co Ltd | Semiconductor device |
| DE2641767B2 (en) * | 1976-09-14 | 1979-05-31 | Mannesmann Ag, 4000 Duesseldorf | Threaded connection for oil field pipes |
-
1982
- 1982-02-16 DZ DZ826776A patent/DZ508A1/en active
- 1982-02-18 FR FR8202697A patent/FR2521675A1/en active Granted
-
1983
- 1983-02-16 EG EG98/83A patent/EG16454A/en active
- 1983-02-17 MX MX196306A patent/MX156310A/en unknown
- 1983-02-17 ES ES1983278066U patent/ES278066Y/en not_active Expired
- 1983-02-17 DK DK069383A patent/DK154173C/en not_active IP Right Cessation
- 1983-02-17 NZ NZ203320A patent/NZ203320A/en unknown
- 1983-02-17 CS CS831079A patent/CS258111B2/en unknown
- 1983-02-17 SU SU833555593A patent/SU1602403A3/en active
- 1983-02-17 AU AU11606/83A patent/AU560228B2/en not_active Expired
- 1983-02-17 NO NO830566A patent/NO162167C/en not_active IP Right Cessation
- 1983-02-17 CA CA000421777A patent/CA1214481A/en not_active Expired
- 1983-02-17 BR BR8300752A patent/BR8300752A/en unknown
- 1983-02-17 JP JP58025482A patent/JPS58152994A/en active Pending
- 1983-02-17 IE IE333/83A patent/IE54076B1/en not_active IP Right Cessation
- 1983-02-17 GB GB08304374A patent/GB2116276B/en not_active Expired
- 1983-02-18 DE DE198383400346T patent/DE89253T1/en active Pending
- 1983-02-18 DE DE8383400346T patent/DE3365380D1/en not_active Expired
- 1983-02-18 DD DD83248079A patent/DD207748A5/en not_active IP Right Cessation
- 1983-02-18 EP EP83400346A patent/EP0089253B1/en not_active Expired
- 1983-02-18 AT AT83400346T patent/ATE21542T1/en not_active IP Right Cessation
- 1983-02-22 IN IN110/DEL/83A patent/IN159012B/en unknown
-
1986
- 1986-11-05 SG SG883/86A patent/SG88386G/en unknown
-
1987
- 1987-01-15 HK HK59/87A patent/HK5987A/en not_active IP Right Cessation
- 1987-12-30 MY MY267/87A patent/MY8700267A/en unknown
-
1994
- 1994-01-20 GE GEAP19941742A patent/GEP19970670B/en unknown
Also Published As
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| IE54076B1 (en) | New joint for steel pipe which is oil tight at high pressure and insensitive to the phenomenon of seizure | |
| US7621034B2 (en) | Tubular threaded joint which is impervious to the external environment | |
| US4988127A (en) | Threaded tubing and casing joint | |
| US4802695A (en) | Pipe screwed connection | |
| JP2005214423A (en) | Threaded joint for tube | |
| CA2477335A1 (en) | Wedgethread pipe connection | |
| CA2163282A1 (en) | Threaded joint for oil well pipes | |
| IE871881L (en) | Screw pipe connection | |
| US5330239A (en) | Pipe coupling | |
| US2389377A (en) | Lock nut | |
| US6464439B1 (en) | Low tolerance threaded fastener | |
| EP0108980B1 (en) | Tubular connection | |
| US1092256A (en) | Coupling or lock-nut. | |
| JPH0210315B2 (en) | ||
| GB2485360A (en) | Thread-type pipe connector | |
| EP1431645A1 (en) | Threaded joint | |
| GB2197410A (en) | Pipe coupling | |
| IN164262B (en) | ||
| CA2128060C (en) | Pipe coupling | |
| US954496A (en) | Flexible pipe-joint. | |
| CA2059594C (en) | Pipe coupling | |
| GB189703392A (en) | Improvements in Bulkheads, Partitions, Berths, Cabin Furniture, and the like, constructed of Aluminium or Alloys thereof. | |
| DE2450126A1 (en) | Compression fitting screwed pipe coupling - has insert with reinforcing sleeve and screwed clamp ring with tapered surfaces | |
| DE2735604A1 (en) | Sleeve joint externally threaded at its ends - in which elastic seal ring is arranged between elongated rings and abutment surface | |
| NO161473B (en) | PROCEDURE FOR SOFTENING HARD ELASTOMES FOR SUBSEQUENT USE IN MANUFACTURE OF CHEMICAL GUM BASE. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK9A | Patent expired |