CN203939447U

CN203939447U - A kind of turn variable buckle joint inside and outside EUB oil pipe with footpath NUP

Info

Publication number: CN203939447U
Application number: CN201420282644.XU
Authority: CN
Inventors: 王振华
Original assignee: TIANJIN JINGGONG PETROLEUM PIPE FITTINGS Co Ltd
Current assignee: TIANJIN JINGGONG PETROLEUM PIPE FITTINGS Co Ltd
Priority date: 2014-05-28
Filing date: 2014-05-28
Publication date: 2014-11-12
Anticipated expiration: 2024-05-28

Abstract

The utility model relates to and a kind of turns variable buckle joint inside and outside EUB oil pipe with footpath NUP, adapter body is cylindrical tube, the axial side inside of described body is coaxially shaped with 2-7/8 " EU thickening box internal thread; this 2-7/8 ", and EU thickening box internal thread per inch 8 is detained, the axial opposite side outer, coaxial of body is shaped with 2-7/8, and " NU does not thicken pin thread external screw thread, this 2-7/8 " NU do not thicken pin thread external screw thread per inch 10 detains; Make female body inner wall of end and be coaxially embedded with a lip-type packing, the outside, body stage casing between external screw thread and internal thread is shaped with the outside transition conical surface, and the body stage casing inwall between external screw thread and internal thread is shaped with the inner transition conical surface.The utility model has carried out deformation design on the basis of the isometrical box cupling product of API5CT standard normal, has directly realized the inside and outside reducing transition of screw thread, has further been suitable for oil pipe and has connected the requirement that reducing uses.

Description

A kind of turn variable buckle joint inside and outside EUB oil pipe with footpath NUP

Technical field

The utility model belongs to oil pipe connector, especially a kind ofly turns variable buckle joint inside and outside EUB oil pipe with footpath NUP.

Background technology

At present, conventional oil pipe is all generally the oil pipe that adopts " API " technical standard to produce both at home and abroad, in reality exploitation is produced, actual production technique becomes increasingly complex for the requirement of vitta structure, and the oil pipe of different-diameter need to be installed at different job positions, therefore needs different model oil pipe to connect, sometimes often need multiple adapters just can reach connection technological requirement, to reach the requirement of production technology, connect comparatively complexity, and connection precision is difficult to ensure card.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of same footpath NUP simple in structure, that precision is high, bonding strength is high, safe and reliable to turn the inside and outside variable buckle joint of EUB oil pipe.

The utility model solves its technical problem and takes following technical scheme to realize:

A kind of turn variable buckle joint inside and outside EUB oil pipe with footpath NUP, adapter body is cylindrical tube, it is characterized in that: the axial side inside of described body is coaxially shaped with 2-7/8 " EU thickening box internal thread; " EU thickeies box internal thread per inch 8 and detains this 2-7/8, the axial opposite side outer, coaxial of body is shaped with 2-7/8, and " NU does not thicken pin thread external screw thread, this 2-7/8 " NU do not thicken pin thread external screw thread per inch 10 detains; Make female body inner wall of end and be coaxially embedded with a lip-type packing, the outside, body stage casing between external screw thread and internal thread is shaped with the outside transition conical surface, and the body stage casing inwall between external screw thread and internal thread is shaped with the inner transition conical surface.

And the taper angle of the described outside transition conical surface is 30 °, the taper angle of the inner transition conical surface is 30 °.

Advantage of the present utility model and good effect are:

1, two of this joint kinds of helicitic texture combined outside positions adopt conical surface transition, have avoided because of the impact of reduced outer diameter on product bonding strength.

2, two of this joint kinds of threaded interior binding sites adopt conical surface transition, have ensured each specification reach, have avoided again reducing because of internal diameter the flow damping phenomena causing.

3, the utility model has carried out deformation design on the basis of the isometrical box cupling product of API5CT standard normal, has directly realized the inside and outside reducing transition of screw thread, has further been suitable for oil pipe and has connected the requirement that reducing uses.

Brief description of the drawings

Fig. 1 is structural front view of the present utility model.

Detailed description of the invention

Below in conjunction with accompanying drawing and by specific embodiment, the utility model is described in further detail, and following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.

A kind of turn variable buckle joint inside and outside EUB oil pipe with footpath NUP, adapter body is cylindrical tube 2, the axial side inside of this body is coaxially shaped with 2-7/8 " EU thickening box internal thread 6; this 2-7/8 ", and EU thickening box internal thread per inch 8 is detained, the axial opposite side outer, coaxial of body is shaped with 2-7/8, and " NU does not thicken pin thread external screw thread 4; this 2-7/8 " NU do not thicken pin thread external screw thread per inch 10 detains, and thickening external screw thread can promote its bonding strength;

Make female body inner wall of end and be coaxially embedded with a lip-type packing 1, this lip-type packing is along with connector is progressively tightened the tightness of strengthening oil pipe;

Making female body outer end diameter is greater than and is shaped with externally threaded body outer end diameter, outside, body stage casing between external screw thread and internal thread is shaped with the outside transition conical surface 3, the taper angle a of this outside transition conical surface is 30 °, and this outside transition conical surface has been avoided because of the impact of reduced outer diameter on product bonding strength;

Body middle-end inwall between external screw thread and internal thread is shaped with the inner transition conical surface 5, and the taper angle b of this inner transition conical surface is 30 °, and the inner transition conical surface has ensured each specification reach, has avoided again reducing because of internal diameter the flow damping phenomena causing; Body inside between the inner transition conical surface and internal thread is coaxially shaped with an escape, further improves the assembling fitness of joint and oil pipe, and leaves withdrawing size for processing.

The present embodiment is not thickeied pin thread external screw thread by internal thread specification by 2-7/8 " the direct reducing of EU thickening box internal thread is to 2-7/8 " NU, effectively reduces by the cost of oil pipe reducing.Thread parameter described in the present embodiment is carried out API5B standard, keeps versatility and the interchangeability of product.

EU represents the oil pipe button-type of external upset (EU), and NU represents not have the oil pipe button-type of external upset (EU), and P represents pin thread, and B represents female mouthful; 3-1/2 " and 2-7/8 " all belongs to the thread parameter of API5B standard.

Although disclose for the purpose of illustration embodiment of the present utility model and accompanying drawing, but it will be appreciated by those skilled in the art that: not departing from the spirit and scope of the utility model and claims, various replacements, variation and amendment are all possible, therefore, scope of the present utility model is not limited to embodiment and the disclosed content of accompanying drawing.

Claims

1. one kind turns variable buckle joint inside and outside EUB oil pipe with footpath NUP, adapter body is cylindrical tube, it is characterized in that: the axial side inside of described body is coaxially shaped with 2-7/8 " EU thickening box internal thread; " EU thickeies box internal thread per inch 8 and detains this 2-7/8, the axial opposite side outer, coaxial of body is shaped with 2-7/8, and " NU does not thicken pin thread external screw thread, this 2-7/8 " NU do not thicken pin thread external screw thread per inch 10 detains; Make female body inner wall of end and be coaxially embedded with a lip-type packing, the outside, body stage casing between external screw thread and internal thread is shaped with the outside transition conical surface, and the body stage casing inwall between external screw thread and internal thread is shaped with the inner transition conical surface.

2. same footpath NUP according to claim 1 turns variable buckle joint inside and outside EUB oil pipe, it is characterized in that: the taper angle of the described outside transition conical surface is 30 °, and the taper angle of the inner transition conical surface is 30 °.