CN201705230U - Special threading connector for sleeve with small external diameter - Google Patents

Special threading connector for sleeve with small external diameter Download PDF

Info

Publication number
CN201705230U
CN201705230U CN2010201217198U CN201020121719U CN201705230U CN 201705230 U CN201705230 U CN 201705230U CN 2010201217198 U CN2010201217198 U CN 2010201217198U CN 201020121719 U CN201020121719 U CN 201020121719U CN 201705230 U CN201705230 U CN 201705230U
Authority
CN
China
Prior art keywords
thread
buttress thread
sealing surface
torque shoulder
threading 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.)
Expired - Lifetime
Application number
CN2010201217198U
Other languages
Chinese (zh)
Inventor
申昭熙
上官丰收
林凯
潘志勇
王建军
刘文红
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.)
China National Petroleum Corp
CNPC Tubular Goods Research Institute
Original Assignee
China National Petroleum Corp
CNPC Tubular Goods Research Institute
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 China National Petroleum Corp, CNPC Tubular Goods Research Institute filed Critical China National Petroleum Corp
Priority to CN2010201217198U priority Critical patent/CN201705230U/en
Application granted granted Critical
Publication of CN201705230U publication Critical patent/CN201705230U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a special threading connector for a sleeve with a small external diameter. The buttress thread A of an external threading connector is an API buttress thread, a seal surface A is connected with the buttress thread A through a cylindrical surface, a torsion circular bead A is positioned at the position of the end surface of the external threading connector, the end surface of the torsion circular bead is inclined towards in the inner wall of a pipe for 20 degrees, and is connected with the seal surface A through an arc surface, the buttress thread B of a coupling threading connector is positioned at the corresponding position in a coupling, which corresponds to the buttress thread of the external threading connector, a tool withdrawal groove is positioned at the disappearing position of the buttress threading connector, a seal surface B is connected with the tool withdrawal groove, a torsion bead B is connected with the seal surface B through the cylindrical surface, the end surface of the torsion circular bead B is inclined towards the outer wall of the pipe for 20 degrees, the external threading connector is meshed with the upper buckle of the coupling thread connector, the structure of the seal surface A and the structure of the seal surface B tightly correspond to each other, the structure of the torsion circular bead A and the structure of the torsion circular bead tightly correspond to each other, the arc surface of the external threading connector is meshed with the cylindrical surface of the coupling threading connector to form a thread compound cavity, the tightness is good, and the processing cost is low.

Description

A kind of little external diameter overlaps effective special thread joint
Technical field
The utility model relates to a kind of little external diameter of external diameter 110mm-150mm that is applicable to and overlaps effective special thread joint.
Background technology
Sleeve pipe is the important component part in the oilfield prospecting developing, and the exploitation of oil gas well is played an important role.In order to improve the hermetic seal reliability that these joints are used in the down-hole, used special joint in a large number.Special joint in the market all belongs to high performance hermetic seal joint, and the processing cost height is not suitable for hyposmosis low yield oil gas well.Hyposmosis low yield oil gas well production is low, and pressure belongs to mesolow oil gas well, adopts high performance special thread joint, and cost is too high, causes whole mouthful of well benefit low, even does not have benefit.
The utility model content
The purpose of this utility model is that a kind of little external diameter of external diameter 110mm-150mm that is applicable to of design overlaps effective special thread joint, this special joint is to increase a metallic sealing section to form on the buttress thread basis of standard, improve the gas sealing ability of buttress thread, processing cost increases few simultaneously.
What the utility model related to is applicable to that the little external diameter of external diameter 110mm-150mm overlaps effective special thread joint and is made up of male connection and box cupling nipple; Male connection is made of buttress thread A, sealing surface A and torque shoulder A, buttress thread A is an API standard buttress thread, sealing surface A links to each other with buttress thread A by cylinder, torque shoulder A is positioned at the end of male connection, end face becomes 20 degree to tilt to inside pipe wall, links to each other with sealing surface A by arc surface;
The box cupling nipple is made of buttress thread B, sealing surface B, escape and torque shoulder B, buttress thread B is positioned at box cupling and male connection buttress thread A corresponding section, escape is positioned at buttress thread disappearance position, and sealing surface B links to each other with escape; Torque shoulder B links to each other by cylinder with sealing surface B, torque shoulder B end face becomes 20 degree to tilt to the pipe outer wall, button engagement on male connection and the box cupling nipple, sealing surface A and the corresponding driving fit of sealing surface B structure, torque shoulder A and the corresponding driving fit of torque shoulder B structure, the cylinder engagement back of the arc surface of male connection and box cupling nipple constitutes a thread compound chamber.
API standard buttress thread is used for male connection and is connected with the box cupling nipple; Sealing surface is the metal to metal seal face that is used to guarantee the joint gas sealing ability; Torque shoulder is used to control the joint position on the buckle, as auxiliary seal; Behind the button, the buttress thread of engagement provides link strength for joint on box cupling and the body external screw thread, and the sealing surface of engagement provides the hermetic seal ability for joint.When the contact pressure on the torque shoulder of male connection and box cupling nipple after to a certain degree, promptly think to be anchored to the position on the joint.Unnecessary thread compound can be stored at escape and place, thread compound chamber in the button back on the joint, reduces the negative effect of thread compound pressure butt joint sealing performance.20 ° torque shoulder still can keep the auxiliary seal effect under certain tensile load effect.
Description of drawings
The little external diameter of Fig. 1 overlaps effective different nipple male connection structural representation.
The little external diameter of Fig. 2 overlaps effective different nipple box cupling nipple structural representation.
The little external diameter of Fig. 3 overlaps the male connection and the box cupling nipple combination schematic diagram of effective different nipple.
Wherein:
1, male connection 2, box cupling nipple 3, buttress thread A 4, torque shoulder A 5, sealing surface A 6, escape 7, buttress thread B 8, torque shoulder B 9, sealing surface B 10, thread compound chamber
The specific embodiment
The little external diameter that is applicable to external diameter 110mm-150mm that the utility model relates to overlaps effective special thread joint and is made up of male connection 1 and box cupling nipple 2; Male connection is made of buttress thread A3, sealing surface A 5 and torque shoulder A 4, buttress thread A is an API standard buttress thread, sealing surface A links to each other with buttress thread A by cylinder, torque shoulder A is positioned at the end of male connection, end face becomes 20 degree to tilt to inside pipe wall, links to each other with sealing surface A by arc surface;
The box cupling nipple is made of buttress thread B7, sealing surface B9, escape 6 and torque shoulder B8, buttress thread B is positioned at box cupling and male connection buttress thread A corresponding section, escape is positioned at buttress thread B disappearance position, and sealing surface B links to each other with escape; Torque shoulder B links to each other by cylinder with sealing surface B, torque shoulder B end face becomes 20 degree to tilt to the pipe outer wall, button engagement on male connection 1 and the box cupling nipple 2, sealing surface A5 and the corresponding driving fit of sealing surface B9 structure, torque shoulder A 4 and the corresponding driving fit of torque shoulder B8 structure, the cylinder engagement back of the arc surface of male connection and box cupling nipple constitutes a thread compound chamber 10.

Claims (1)

1. a little external diameter overlaps effective special thread joint, it is characterized in that: be made up of male connection and box cupling nipple; Male connection is made of buttress thread A, sealing surface A and torque shoulder A, buttress thread A is an API standard buttress thread, sealing surface A links to each other with buttress thread A by cylinder, torque shoulder A is positioned at the end of male connection, end face becomes 20 degree to tilt to inside pipe wall, links to each other with sealing surface A by arc surface;
The box cupling nipple is made of buttress thread B, sealing surface B, escape and torque shoulder B, buttress thread B is positioned at box cupling and male connection buttress thread A corresponding section, escape is positioned at buttress thread disappearance position, and sealing surface B links to each other with escape; Torque shoulder B links to each other by cylinder with sealing surface B, and torque shoulder B end face becomes 20 degree to tilt to the pipe outer wall;
Button engagement on male connection and the box cupling nipple, sealing surface A and the corresponding driving fit of sealing surface B structure, torque shoulder A and the corresponding driving fit of torque shoulder B structure, the cylinder engagement back of the arc surface of male connection and box cupling nipple constitutes a thread compound chamber.
CN2010201217198U 2010-02-26 2010-02-26 Special threading connector for sleeve with small external diameter Expired - Lifetime CN201705230U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201217198U CN201705230U (en) 2010-02-26 2010-02-26 Special threading connector for sleeve with small external diameter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010201217198U CN201705230U (en) 2010-02-26 2010-02-26 Special threading connector for sleeve with small external diameter

Publications (1)

Publication Number Publication Date
CN201705230U true CN201705230U (en) 2011-01-12

Family

ID=43442385

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010201217198U Expired - Lifetime CN201705230U (en) 2010-02-26 2010-02-26 Special threading connector for sleeve with small external diameter

Country Status (1)

Country Link
CN (1) CN201705230U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102720439A (en) * 2012-06-16 2012-10-10 无锡西姆莱斯石油专用管制造有限公司 High-tightness buttress thread sleeve joint
CN102720440A (en) * 2012-06-16 2012-10-10 无锡西姆莱斯石油专用管制造有限公司 High-sealed BCSG joint
CN104847282A (en) * 2015-05-12 2015-08-19 天津商业大学 Special buckle oil casing sealing structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102720439A (en) * 2012-06-16 2012-10-10 无锡西姆莱斯石油专用管制造有限公司 High-tightness buttress thread sleeve joint
CN102720440A (en) * 2012-06-16 2012-10-10 无锡西姆莱斯石油专用管制造有限公司 High-sealed BCSG joint
CN104847282A (en) * 2015-05-12 2015-08-19 天津商业大学 Special buckle oil casing sealing structure

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GR01 Patent grant
CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20110112