GB2033518A - Improvements in and relating to pipe connectors - Google Patents

Improvements in and relating to pipe connectors Download PDF

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Publication number
GB2033518A
GB2033518A GB7844120A GB7844120A GB2033518A GB 2033518 A GB2033518 A GB 2033518A GB 7844120 A GB7844120 A GB 7844120A GB 7844120 A GB7844120 A GB 7844120A GB 2033518 A GB2033518 A GB 2033518A
Authority
GB
United Kingdom
Prior art keywords
grooves
projections
frusto
members
pipe connector
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.)
Granted
Application number
GB7844120A
Other versions
GB2033518B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunting Oilfield Services Ltd
Hunting Oilfield Services UK Ltd
Original Assignee
Hunting Oilfield Services Ltd
Hunting Oilfield Services UK Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hunting Oilfield Services Ltd, Hunting Oilfield Services UK Ltd filed Critical Hunting Oilfield Services Ltd
Priority to GB7844120A priority Critical patent/GB2033518B/en
Priority to US05/965,095 priority patent/US4298221A/en
Priority to NO793387A priority patent/NO156216C/en
Priority to CA338,871A priority patent/CA1112262A/en
Priority to DE19797931005U priority patent/DE7931005U1/en
Priority to DE19792944238 priority patent/DE2944238A1/en
Priority to FR7927737A priority patent/FR2441785A2/en
Priority to JP14597079A priority patent/JPS5572978A/en
Publication of GB2033518A publication Critical patent/GB2033518A/en
Application granted granted Critical
Publication of GB2033518B publication Critical patent/GB2033518B/en
Priority to JP1983137895U priority patent/JPS5985484U/en
Expired legal-status Critical Current

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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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/16—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars
    • F16L13/168—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars for screw threaded pipes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B17/08—Casing joints

Abstract

The present invention relates to improvements in pipe connectors particularly but not exclusively for use in the drilling and/or completion of off-shore oil and/or gas wells and comprises a tubular pin member (1) and a tubular box member (3) telescopically engageable with the pin member, the members having corresponding frusto- conical surfaces (5, 6) which are provided with interengageable annular grooves (7) and projections (12) having planar root and crest surfaces lying on common frusto- conical surfaces having the same conicity as the frusto-conical surfaces (5, 6) of the pin and box members. In assembling the pin and box members, the end projections make metal-to-metal contact with the surfaces adjacent the corresponding grooves and the projections and grooves intermediate the end projections and grooves are of lesser axial dimensions and spacing than the end projections and grooves. <IMAGE>

Description

SPECIFICATION Improvements in and relating to pipe connectors The present invention relates to improvements in pipe connectors particularly but not exclusively designed and adapted for use in connecting pipes and other tubular structures for use in the drilling and/or completion of offshore oil and/or gas wells.
In copending application no. 3227/77 there is described a pipe connector comprising a tubular pin member and a tubular box member which are telescopically engageable, the pin and box members having corresponding frusto-conical outer and inner peripheral surfaces which overlie each other when the members are engaged. To axially lock the pin and box members together, the frusto-conical surfaces have interengageable annular projections and grooves. To engage the members together, the box member is forced over the pin member, the box member expanding and/or the pin member contracting to enable the projections to ride into the grooves. The pin and box members are, in the preferred embodiment, made of metal and engagement is facilitated by supplying liquid under pressure between the frusto-conical surfaces to expand the box member and/or contract the pin member.For the liquid to be effective, seals have to be provided between the overlapped parts of the frusto-conical surfaces of the members and this is simply obtained by arranging the frusto-conical surfaces so that metal-to-metal contact is obtained sufficient to seal or at least restrict the flow of the liquid between the overlapping parts of the surfaces.
In the above referred to application, the projections and grooves of the frusto-conical surfaces are substantially equally axially spaced apart along the axial length of the frusto conical surfaces and of equal axial extent. The members are dimensioned so that when the members are pushed together each projection comes into metal-to-metal contact with the part of the frusto-conical surface upstrem of its groove so that a seal is initially provided by each projection and the projection has merely to slide over the upstream part of the frusto-conical surface into its groove.
It has now been appreciated that it is unnecessary to provide this metal-to-metal contact between all projections and grooves, metal-to-metal sealing contact being merely required at each end of the surfaces. As will become apparent, this enables a substantial reduction in the axial length of the frustoconical surfaces and therefore of the pin and box members with a consequent substantial saving in material.
According to one aspect of the present invention there is provided a pipe connector comprising a tubular pin member and a tubular box member telescopically engageable with the pin member, the pin member having a frusto-conical outer peripheral surface and the box member having a corresponding frusto-conical inner peripheral surface which overlies the frusto-conical surface of the pin member when the members are engaged, the frusto-conical surfaces having a plurality of axially spaced interengageable projections and grooves extending circumferentially thereof and interengageable to axially lock the pin and box members together, wherein the projections and grooves are dimensioned so that initial metal-to-metal contact is made between the crest surfaces of the end projections at each end of the one frusto-conical surface provided with the projections and the surfaces of the other frusto-conical surface adjacent the end grooves, the projections and grooves intermediate the end projections and grooves being of lesser axial dimensions and spacing than the end projections and grooves, and the radial dimensions of the projections and grooves are such that the expansion of the box member and/or contraction of the pin member resulting from forcing the projections into the corresponding grooves during engagement of the members does not exceed the elastic limit of the material of the members.
Advantageously the root and crest surfaces of the projections and grooves lie on frustoconical surfaces parallel to the frusto-conical surfaces of the pin and box members. The projection may be provided on the pin or the box member, with the corresponding grooves being provided on the other member. Preferably the projections and grooves and surfaces therebetween are arranged so that, considering one of the frusto-conical surfaces it can be said to have either projections or grooves.
The radially extending end surfaces at one end of the projections and grooves can be arranged to transmit forces of compression through the connector and are, for this reason, arranged to extend radially or at a small angle to the radial plane. The members may be arranged so that these end surfaces of the projections and grooves are in positive abutment when the members are engaged.
For the input of liquid under pressure between the surfaces of the members during engagement, a radial inlet duct may be provided in the box member intermediate the ends of the frusto-conical surface thereof.
Further features and advantages of the present invention will become apparent from the following description of embodiments thereof, given by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a diagrammatic sectional view showing part of an embodiment of a connector according to the invention; Figure 2 is a part sectional, part side view of the box member of the connector of Fig. 1; Figure 3 is an enlarged view of part of one end of the connector of Fig. 1 during engagement of the pin and box members; and Figure 4 is a view corresponding to that of Fig. 3 showing the pin and box members when engaged.
As shown in the drawings, the pipe connector comprises a tubular pin member 1, for connection, e.g. by welding, to the end of a pipe 2, and a tubular box member 3 for connection, e.g. by welding, to the end of a pipe 4 to be connected to pipe 2. The pin and box members are telescopically engageable and have corresponding frusto-conical outer and inner peripheral surfaces 5, 6 respectively which overlie one another when the pin member 1 is fully telescoped into the box member 2.
To axially lock the pin member to the box member, the box member is provided with a plurality of circumferentially extending annular grooves, 7a, .... .71 each groove extending in a radial plane and having radially extending end surfaces 8, 9 separated by root surface 10. The grooves are axially spaced apart by surfaces 11 a, 11 b. 1 informing the frustoconical surface 6. The pin member has a plurality of axially spaced circumferentially extending annular projections 12a, 12b. .. 12j corresponding to the grooves ..... 7j, each projection having radially extending surfaces 13, 14 separated by crest surface 15, the grooves being spaced by surfaces 1 6a, 16b... 1 6jforming the frusto conical surface 5.
As shown, the root and crest surfaces 10, 15 lie on frusto-conical surfaces parallel to the surfaces 11, 16 so that all the projections and the grooves are of equal depth. The projections and grooves may, as shown, extend over substantially the entire extent of the surfaces 5, 6 but may extend over a lesser part of the surface.
The box member is provided with a radial passage 17 communicating with an axially extending recess 18 intersecting some of the grooves centrally of the grooved region. The passage is adapted for connection to a source of liquid, e.g. oil, under pressure, e.g. at about 175.7 to 210.9 Kg/m2 where the pin and box members are made of high tensile steel.
As shown, the connector is intended to transmit compressive forces, e.g. pile driving forces, between the pipes to which it is connected and to this end the surfaces 8, 13 at one end of each projection and groove are radially extending, or extend at a small angle to the radial plane. Additionally the connector is arranged so that, when the members are engaged, these surfaces 8, 13 are in abutment. As shown this is obtained by arranging the projections and grooves so that a radial end surface 20 on the box member comes into abutment with a corresponding radial surface 19 on the pin member to create a force fit between these surface 19, 20 and the surfaces 8, 13. As shown, the projections and grooves are dimensioned so that there is a slight radial clearance between the other overlying surfaces 15, 16, 10, 11 and radial and axial clearance between surfaces 9, 14.
In modifications, the radial clearances between the surfaces 15, 16 and 10, 11 may be omitted so that the pin member is a force fit in the box member.
The frusto conical surfaces 5, 6 and end grooves 7a, 7jand projections 12a, 12jar arranged and dimensioned so that, when the pin and box members are pushed together, initial metal-to-metal contact is obtained, as shown in Fig. 3, between the crest surfaces 15 of the end projections 12a, 1 2j of the pin member and the surfaces 1 1 a, 1 it of the box member adjacent the end grooves 7a, 7j. The projections and grooves intermediate these end projections and grooves need not provide metal-to-metal contact.
The connector is assembled by telescoping the members together until metal-to-metal contact is obtained as shown in Fig. 3. At this point liquid under pressure is supplied to the duct 17 and flows along recess 18 between the members up to the regions of metal to metal contact. The pressure of the liquid is set at a level sufficient to produce expansion of the box member and/or contraction of the pin member sufficient to permit the members to be pushed together on application of further axial force. It is found that in effect the liquid not only expands the box member and/or contracts the pin member but also lubricates the contacting surfaces of the members which then form a hydrostatic bearing so that contact is lost.Whilst there is a consequent slight leakage of the liquid at the ends of overlap of the members, the leakage is not sufficient to render the application of the liquid ineffective.
It will be appreciated that the frusto-conical surfaces with their projections and grooves are arranged so that, in expanding the box member and/or contracting the pin member, the elastic limit of the material of the pin and box members is not exceeded.
When the members are assembled, it is essential to ensure that no liquid is trapped in any of the grooves. Should liquid be trapped, the corresponding projection will be unable to engage fully in the groove and there will therefore be a risk of the connector coming apart. To avoid this possibility, the recess 18 connected to the liquid inlet duct 17 is extended axially so that liquid in the intermediate grooves can be drained through the recess and duct 17. Any liquid in the end grooves can escape round the end of the pin member and box member respectively.
Seals 21, 22 may be provided in the surface of the pin adjacent the ends thereof, seal 22 is provided primarily to render the interior of the connector fluid tight. Seal 21 is provided in conjunction with seal 22 to trap oil, not under pressure, between the surfaces to reduce corrosion of the surfaces 5, 6. Under these circumstances the duct 17 is also closed.
As has been mentioned above, it has now been appreciated that the intermediate projections and grooves do not have to be arranged to provide initial metal-to-metal contact between a crest of a projection and the surface upstream of the corresponding groove. They can therefore have a lesser axial extent and spacing than the end projections and grooves.
In the embodiment described above, the minimum axial extent and spacing of the projections and grooves must merely be such that there is sufficient metal behind each of the force transmitting surfaces 8, 13 that the surfaces can withstand the force to be applied thereto. It is found that this requirement produces intermediate protection and grooves which have substantially smaller axial extent of spacing so that the overall length of the frusto-conical surfaces can be substantially reduced with a substantial reduction in the material in the pin and box members and therefore a substantial cost saving.As shown, the intermediate projections and grooves have approximately half the axial extent and spacing of the end projections and grooves which produces a connector which is less than half the length of connectors in accordance with application no. 3227/77, when considering connectors for transmitting the same axial force and therefore requiring the same number of force transmitting surfaces 8, 13 of the same radial extent.
As a consequence of this reduction in axial extent of the intermediate projections and grooves, during assembly of the members and after initial metal-to-metal contact has been made, an intermediate projection may, as shown, have to be moved past one or more grooves upstream of its corresponding groove.
To assist movement of a projection out of the groove and onto the downstream surface separating the grooves, the end surfaces 14 of the grooves and the corresponding end surfaces 9 of the projections are inclined at a relatively small angle to the axis.
In a preferred embodiment, the pin and box members are made of high tensile steel and have external and internal diameters of approximately 71 cm. The conicity of the frustoconical surfaces 5, 6 and of the roots and crests of the grooves and projections is 2 .
Each projection has a height of 0.122cm and each groove has a depth of 0.112cm. The end grooves have a length at the surface of 2.133 cm and the end projections have a length at their base of 2.032 cm. The surfaces upstream of the end projections and grooves are correspondingly dimensioned. The intermediate grooves and projections may have, for example, half the dimensions of the end grooves and projection so that the overall length of the frusto conical surfaces of the members is 12.70 cm with an overall connector length of 21.13 cm. This compares with a corresponding connector as described in application no. 3227/77 which would have a frusto conical surface length of about 42 cm and an overall length of about 53 cm.
The force transmitting surfaces 8, 13 of the projections and grooves preferably are inclined at 12 to the radial plane and the other end faces 9, 14 may be inclined at an angle of 75 to the radial plane.
It will be appreciated that by using a different angle for the conicity of the frusto conical surfaces of the members and different materials for the members, the foregoing dimensions and numbers of the projections and grooves may be varied.
It will also be appreciated that, while the above described connector has been described in terms of projections provided on the pin member and grooves provided in the box member, this is exactly equivalent to the provision of grooves in the pin member and projections in the box member. Indeed, while the surfaces 13, 14 and 15 have been described as defining a projection on the pin member, the surfaces 13, 14 and 16 could equally be described as providing a groove on the pin member with the corresponding surfaces on the box member providing a projection.
There is thus provided a pipe connector which has a simple construction, is easy to assemble and does not rely on moving parts to ensure interengagement between the pin and box members.
It will be appreciated that many different devices may be provided to apply the axial force to the members to bring them into metal-to-metal contact and during application of liquid under pressure between the frustoconical surfaces. One such device is described in the above application no. 3227/77 and comprises two plates which are split diametrically and arranged to be engaged around a respective one of the members, for example in abutment with surfaces 23, 24. A plurality of hydraulic jacks are arranged to act between the plates, the jacks being angularly spaced apart around the axis of the members.
Should the above described connector be required to transmit torque, as well as compressive forces, an inwardly projecting pin may be provided at the inner end of the frusto conical surface of the box member for engagement in a recess provided in the leading edge of the pin member.

Claims (17)

1. A pipe connector comprising a tubular pin member and a tubular box member telescopically engageable with the pin member, the pin member having a frusto-conical outer peripheral surface and the box member having a corresponding frusto-conical inner peripheral surface which overlies the frustoconical surface of the pin member when the members are engaged, the frusto-conical surfaces having a plurality of axially spaced interengageable projections and grooves extending circumferentially thereof and interengageable to axially lock the pin and box members together, wherein the projections and grooves are dimensioned so that initial metal-to-metal contact is made between the crest surfaces of the end projections at each end of the one frusto-conical surface provided with the projections and the surfaces of the other frustoconical surface adjacent the end grooves, the projections and grooves intermediate the end projections and grooves being of lesser axial dimensions and spacing than the end projections and grooves, and the radial dimensions of the projections and grooves are such that the expansion of the box member and/or contraction of the pin member resulting from forcing the projections into the corresponding grooves during engagements of the members does not exceed the elastic limit of the material of the members.
2. A pipe connector as claimed in claim 1, wherein the projections have planar crest surfaces and the grooves have corresponding planar root surfaces.
3. A pipe connector as claimed in either claim 1 or claim 2, wherein the crest and root surfaces of the projections and grooves respectively lie on common frusto-conical surfaces.
4. A pipe connector as claimed in claim 3, wherein the frusto-conical surfaces of the crest and root surfaces of the projections and grooves respectively are parallel to the frustoconical surfaces of the pin and box members.
5. A pipe connector as claimed in any one of the preceding claims, wherein the angle of conicity of the frusto-conical surfaces of the members is of the order of 2 .
6. A pipe connector as claimed in any one of the preceding claims, wherein the projections and grooves intermediate the end projections and grooves are equally spaced apart along the length of the frusto-conical surfaces.
7. A pipe connector as claimed in any one of the preceding claims, wherein the pin member is a force fit in the box member when fully engaged therewith.
8. A pipe connector as claimed in any one of the preceding claims, wherein the box member is provided with a radial passage for connection to a supply of fluid under pressure, the passage communicating with an axially extending groove in the frusto-conical surface of the box member and extending centrally of the region provided with the projections and grooves of the assembled pin and box members, for communicating fluid under pressure to the projections and grooves for causing expansion of the box member and/or contraction of the pin member for assisting in the assembly of the connector.
9. A pipe connector as claimed in claim 8, wherein the box member is provided with the annular grooves and the axially extending groove extends axially to communicate with that annular groove adjacent the end groove at each end of the box member.
10. A pipe connector as claimed in any one of the preceding claims, wherein the pin and box members are adapted for connection to means external thereto for applying an axial force thereto for assisting in assembly of the connector.
11. A pipe connector as claimed in any one of the preceding claims, wherein each groove in one of the frusto-conical surfaces is defined by a pair of spaced radially extending end surfaces interconnected by a root surface extending parallel to the one frusto-conical surface, and each projection in the other frusto-conical surface is defined by a pair of spaced radially extending end surfaces corresponding to the end surfaces of the corresponding groove and inter-connected by a crest surface extending parallel to the other frusto-conical surface.
12. A pipe connector as claimed in claim 11, wherein the radially extending end surfaces of the grooves and projections respectively intermediate the end grooves and projections are equally spaced apart.
13. A pipe connector as claimed in either claim 11 or claim 12, comprising a pair of radially extending faces provided one on the pin member and one on the box member for abutment when the members are engaged and arranged relative to the projections and grooves such that one of the end surfaces of each projection is maintained in metal-tometal contact with the corresponding end surface of the corresponding groove by abutment between said radially extending faces for transmission of axial forces between the members when engaged.
14. A pipe connector as claimed in claim 13, wherein a clearance is provided between the other end surfaces of the projections and grooves when inter-engaged.
15. A pipe connector as claimed in either claim 13 or claim 14, wherein the one radially extending end surface of each projection and the corresponding end surface of each groove is inclined at an angle of the order of 12 to a plane perpendicular to the axis of the connector.
16. A pipe connector as claimed in any one of claims 13 to 15, wherein the other end surfaces of the projections and grooves are inclined at an angle of the order of 75 to said plane.
17. A pipe connector substantially as herein described with reference to the accom panying drawings.
GB7844120A 1977-01-26 1978-11-10 Pipe connectors Expired GB2033518B (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB7844120A GB2033518B (en) 1978-11-10 1978-11-10 Pipe connectors
US05/965,095 US4298221A (en) 1977-01-26 1978-11-30 Pipe connectors
NO793387A NO156216C (en) 1978-11-10 1979-10-22 PIPE CONNECTION INCLUDING A PIPE SHAPE PART AND A PIPE SHAPE PART.
CA338,871A CA1112262A (en) 1978-11-10 1979-10-31 Pipe connectors
DE19797931005U DE7931005U1 (en) 1978-11-10 1979-11-02 PIPE CONNECTION DEVICE
DE19792944238 DE2944238A1 (en) 1978-11-10 1979-11-02 PIPE CONNECTION DEVICE
FR7927737A FR2441785A2 (en) 1978-11-10 1979-11-09 TUBE CONNECTION
JP14597079A JPS5572978A (en) 1978-11-10 1979-11-10 Pipe connector
JP1983137895U JPS5985484U (en) 1978-11-10 1983-09-07 pipe connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7844120A GB2033518B (en) 1978-11-10 1978-11-10 Pipe connectors

Publications (2)

Publication Number Publication Date
GB2033518A true GB2033518A (en) 1980-05-21
GB2033518B GB2033518B (en) 1983-01-26

Family

ID=10500969

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7844120A Expired GB2033518B (en) 1977-01-26 1978-11-10 Pipe connectors

Country Status (6)

Country Link
JP (2) JPS5572978A (en)
CA (1) CA1112262A (en)
DE (2) DE2944238A1 (en)
FR (1) FR2441785A2 (en)
GB (1) GB2033518B (en)
NO (1) NO156216C (en)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508970A1 (en) * 1981-07-06 1983-01-07 Dril Quip Inc CONNECTING ASSEMBLY, CONNECTING APPARATUS, JOINT OF TUBES AND METHOD OF MAKING A SCREW CONNECTION BETWEEN TWO LONGITUDINAL ELEMENTS
DE3301016A1 (en) * 1982-01-18 1983-07-28 Hunting Oilfield Services (UK) Ltd., Aberdeen PIPE CONNECTION
FR2526079A2 (en) * 1982-04-29 1983-11-04 Dril Quip Inc CONNECTOR ASSEMBLY
FR2544049A1 (en) * 1983-04-05 1984-10-12 Hunting Oilfield Services Ltd FITTING FOR PIPING
US4525001A (en) * 1982-01-18 1985-06-25 Hunting Oilfield Services (Uk) Limited Pipe connector with interengagable tubular pin and tubular box members
US4720124A (en) * 1985-08-02 1988-01-19 Cameron Iron Works, Inc. Telescoping joint
US5044676A (en) * 1990-01-05 1991-09-03 Abbvetco Gray Inc. Tubular threaded connector joint with separate interfering locking profile
EP0803637A2 (en) * 1996-04-26 1997-10-29 Oil States Industries (UK) Ltd. Pipe connector device with pin and box members having corresponding frusto-conical surfaces
US5964486A (en) * 1997-03-24 1999-10-12 Oil States Industries (Uk) Limited Pipe connectors
US6056324A (en) * 1998-05-12 2000-05-02 Dril-Quip, Inc. Threaded connector
EP1167852A2 (en) * 2000-05-18 2002-01-02 Daido Tokushuko Kabushiki Kaisha Diffusion bonded metal pipe, diffusion bonded metal pipe expansion method, and method for inspecting diffusion bonded metal pipes
WO2002012773A1 (en) 2000-08-08 2002-02-14 Oil States Industries (Uk) Ltd Pipe assembly
WO2007098965A1 (en) * 2006-03-04 2007-09-07 Mashinenbau Kolk Gmbh Tube protection with plugged tube cladding
WO2011128658A1 (en) 2010-04-15 2011-10-20 Oil States Industries (U.K.) Limited Pipe connector device
US8056940B2 (en) 2008-06-27 2011-11-15 Oil States Industries (Uk) Ltd. Pipe connector device
WO2014184681A2 (en) 2013-05-03 2014-11-20 Oil States Industries (Uk) Ltd. Merlin drilling riser assembly
WO2017058014A1 (en) * 2015-09-30 2017-04-06 Victor Jan De Waal Pile
WO2020225545A1 (en) 2019-05-03 2020-11-12 Oil States Industries (Uk) Limited Pipe coupling
US11156313B2 (en) 2015-04-16 2021-10-26 Krzysztof Jan Wajnikonis Mechanical connectors
US11434699B2 (en) 2015-04-16 2022-09-06 Krzysztof Jan Wajnikonis Mechanical connector of long torsional and bending fatigue life
US11781682B2 (en) 2015-04-16 2023-10-10 Krzysztof Jan Wajnikonis Enhancements of mechanical connector technology
US11906079B2 (en) 2015-04-16 2024-02-20 Krzysztof Jan Wajnikonis Telescopically assembled mechanical connector

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5360242A (en) * 1992-10-07 1994-11-01 Argent Michael F Pipe connecting assembly and method for joining two lengths of steel pipe by a press-fit connection
JPH1122880A (en) * 1997-07-02 1999-01-26 Nkk Corp Antiseismic pipe fitting and pipe equipped with antiseismic fitting
WO2009044775A1 (en) * 2007-10-01 2009-04-09 Toki Engineering Co., Ltd. Method of joining metal tubes, joint structure, flanged tube, and method of forming the flanged tube
JP6870430B2 (en) * 2017-03-30 2021-05-12 株式会社オンダ製作所 Pipe fitting

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1867430A (en) * 1931-10-03 1932-07-12 Josiah B Wisner Lockable joint for hose sections
US2371784A (en) * 1943-11-18 1945-03-20 New England Foundation Company Sectional pile shell
US2704153A (en) * 1952-08-26 1955-03-15 Florman Irving Receptacle for dispensing cosmetics and the like
US2924949A (en) * 1954-06-03 1960-02-16 Raymond Int Inc Plastic pile shells
US3326006A (en) * 1964-05-01 1967-06-20 Tecon Corp Pile shells and couplings
DE7723698U1 (en) * 1977-01-26 1977-11-03 Hunting Oilfield Services Ltd., Great Yarmouth, Norfolk (Grossbritannien) PIPE CONNECTING DEVICE
US4124232A (en) * 1977-05-04 1978-11-07 Vetco, Inc. Rigid pipe connector with lock elements and method of making the same

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508970A1 (en) * 1981-07-06 1983-01-07 Dril Quip Inc CONNECTING ASSEMBLY, CONNECTING APPARATUS, JOINT OF TUBES AND METHOD OF MAKING A SCREW CONNECTION BETWEEN TWO LONGITUDINAL ELEMENTS
DE3301016A1 (en) * 1982-01-18 1983-07-28 Hunting Oilfield Services (UK) Ltd., Aberdeen PIPE CONNECTION
US4525001A (en) * 1982-01-18 1985-06-25 Hunting Oilfield Services (Uk) Limited Pipe connector with interengagable tubular pin and tubular box members
US4561683A (en) * 1982-01-18 1985-12-31 Hunting Oilfield Services (Uk) Limited Pipe connector with interengageable tubular pin and tubular box members
FR2526079A2 (en) * 1982-04-29 1983-11-04 Dril Quip Inc CONNECTOR ASSEMBLY
FR2544049A1 (en) * 1983-04-05 1984-10-12 Hunting Oilfield Services Ltd FITTING FOR PIPING
US4720124A (en) * 1985-08-02 1988-01-19 Cameron Iron Works, Inc. Telescoping joint
US5044676A (en) * 1990-01-05 1991-09-03 Abbvetco Gray Inc. Tubular threaded connector joint with separate interfering locking profile
EP0803637A2 (en) * 1996-04-26 1997-10-29 Oil States Industries (UK) Ltd. Pipe connector device with pin and box members having corresponding frusto-conical surfaces
US5954374A (en) * 1996-04-26 1999-09-21 Oil States Industries (Uk) Ltd. Pipe connectors
EP0803637A3 (en) * 1996-04-26 1999-09-22 Oil States Industries (UK) Ltd. Pipe connector device with pin and box members having corresponding frusto-conical surfaces
US5964486A (en) * 1997-03-24 1999-10-12 Oil States Industries (Uk) Limited Pipe connectors
US6056324A (en) * 1998-05-12 2000-05-02 Dril-Quip, Inc. Threaded connector
EP1167852A2 (en) * 2000-05-18 2002-01-02 Daido Tokushuko Kabushiki Kaisha Diffusion bonded metal pipe, diffusion bonded metal pipe expansion method, and method for inspecting diffusion bonded metal pipes
EP1167852A3 (en) * 2000-05-18 2003-11-12 Daido Tokushuko Kabushiki Kaisha Diffusion bonded metal pipe, diffusion bonded metal pipe expansion method, and method for inspecting diffusion bonded metal pipes
WO2002012773A1 (en) 2000-08-08 2002-02-14 Oil States Industries (Uk) Ltd Pipe assembly
WO2007098965A1 (en) * 2006-03-04 2007-09-07 Mashinenbau Kolk Gmbh Tube protection with plugged tube cladding
US8056940B2 (en) 2008-06-27 2011-11-15 Oil States Industries (Uk) Ltd. Pipe connector device
WO2011128658A1 (en) 2010-04-15 2011-10-20 Oil States Industries (U.K.) Limited Pipe connector device
EP3569811A1 (en) 2013-05-03 2019-11-20 Oil States Industries (UK) Ltd Merlin single drilling riser assembly
WO2014184681A2 (en) 2013-05-03 2014-11-20 Oil States Industries (Uk) Ltd. Merlin drilling riser assembly
US9121229B2 (en) 2013-05-03 2015-09-01 Oil States Industries (Uk) Ltd. Merlin drilling riser assembly
US11613937B2 (en) 2015-04-16 2023-03-28 Krzysztof Jan Wajnikonis Mechanical connector utilizing keys to transfer torque
US11156313B2 (en) 2015-04-16 2021-10-26 Krzysztof Jan Wajnikonis Mechanical connectors
US11434699B2 (en) 2015-04-16 2022-09-06 Krzysztof Jan Wajnikonis Mechanical connector of long torsional and bending fatigue life
US11739595B2 (en) 2015-04-16 2023-08-29 Krzysztof Jan Wajnikonis Mechanical connector utilizing shear pins to transfer torque
US11781682B2 (en) 2015-04-16 2023-10-10 Krzysztof Jan Wajnikonis Enhancements of mechanical connector technology
US11821267B2 (en) 2015-04-16 2023-11-21 Krzysztof Jan Wajnikonis Mechanical connector utilizing interlocked threads to transfer torque
US11906079B2 (en) 2015-04-16 2024-02-20 Krzysztof Jan Wajnikonis Telescopically assembled mechanical connector
US11905767B2 (en) 2015-04-16 2024-02-20 Krzysztof Jan Wajnikonis Mechanical connector utilizing dog-clutch teeth to transfer torque
WO2017058014A1 (en) * 2015-09-30 2017-04-06 Victor Jan De Waal Pile
WO2020225545A1 (en) 2019-05-03 2020-11-12 Oil States Industries (Uk) Limited Pipe coupling

Also Published As

Publication number Publication date
DE2944238C2 (en) 1989-06-22
DE7931005U1 (en) 1980-03-20
CA1112262A (en) 1981-11-10
NO793387L (en) 1980-05-13
JPS5985484U (en) 1984-06-09
GB2033518B (en) 1983-01-26
NO156216C (en) 1987-08-19
DE2944238A1 (en) 1980-05-22
FR2441785A2 (en) 1980-06-13
JPS5572978A (en) 1980-06-02
FR2441785B2 (en) 1985-04-26
NO156216B (en) 1987-05-04

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732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19981109