CN203201491U - Metal air-tight seal rotary bead type drill rod joint - Google Patents

Metal air-tight seal rotary bead type drill rod joint Download PDF

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Publication number
CN203201491U
CN203201491U CN 201320096700 CN201320096700U CN203201491U CN 203201491 U CN203201491 U CN 203201491U CN 201320096700 CN201320096700 CN 201320096700 CN 201320096700 U CN201320096700 U CN 201320096700U CN 203201491 U CN203201491 U CN 203201491U
Authority
CN
China
Prior art keywords
circular bead
face
bead surface
thread piece
drill rod
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 - Fee Related
Application number
CN 201320096700
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Chinese (zh)
Inventor
张小燕
高连新
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.)
Wuxi Seamless Oil Pipe Co Ltd
Original Assignee
Wuxi Seamless Oil Pipe Co 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 Wuxi Seamless Oil Pipe Co Ltd filed Critical Wuxi Seamless Oil Pipe Co Ltd
Priority to CN 201320096700 priority Critical patent/CN203201491U/en
Application granted granted Critical
Publication of CN203201491U publication Critical patent/CN203201491U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a drill rod for oil drilling, in particular to a metal air-tight seal rotary bead type drill rod joint. The metal air-tight seal rotary bead type drill rod joint comprises an outer threaded part and an inner threaded part which are connected together in a threaded mode. The outer threaded part is provided with a first outer circular bead face and a first inner circular bead face. Outer threads which axially extend are arranged at the position, between the first outer circular bead face and the first inner circular bead face, of the outer threaded part. The inner threaded part is provided with a second outer circular bead face and a second inner circular bead face, wherein the second outer circular bead face is outwards arranged in the radial direction, and the second inner circular bead face is inwards arranged in the radial direction. Inner threads which axially extend are arranged at the position, between the second outer circular bead face and the second inner circular bead face, of the inner threaded part. The metal air-tight seal rotary bead type drill rod joint is characterized in that a cone-shaped metal sealing face and a cylindrical face are sequentially arranged between the first inner circular bead face and the outer threads. A spherical metal sealing face is arranged between the second inner circular bead face and the inner threads. The spherical metal sealing face and the cone-shaped metal sealing face are in interference sealing fit. The metal air-tight seal rotary bead type drill rod joint is good in sealing capacity and capable of achieving interchange with an API standard drill rod.

Description

The tool joint of shoulder formula is revolved in the metal hermetic seal
Technical field
The utility model relates to the oil drilling drilling rod, is that the tool joint of shoulder formula is revolved in a kind of metal hermetic seal specifically.
Background technology
At present, the normally API modular connection of tool joint that the petroleum industry drilling well is adopted, the advantage of this joint is according to the API standard manufacture, and technology maturation is processed easily and is detected, and cost is lower, has therefore obtained extensive use.But also have a lot of shortcomings simultaneously, its most outstanding shortcoming is exactly that sealing performance is bad, is not suitable for the exploitation of complex hydrocarbon well.
In order to improve bad this shortcoming of API standard tool joint sealing performance, a lot of researchers have carried out research work.Find that by prior art documents the Chinese patent publication number is CN 2764922Y, open day is on March 19th, 2006, and the utility model patent name is called " two shoulder metal hermetic seal tool joint ", and this patent is improved the API standard tool joint.This utility model is formed by being threaded by external thread piece and inner thread piece.The external thread piece joint has a radially outer outer shoulder and a conical surface metal sealing; The inner thread piece joint has a radially inner outer shoulder and a sphere metal sealing.By the inside and outside shoulder between male connection and the female adapter and metal to metal interference sealing, improve hermetic seal ability and the bonding strength of joint.
Its weak point is: though this joint has improved the hermetic seal ability of joint, but because being still the API modular connection, the tool joint that adopt in present petroleum industry drilling well field accounts for main flow, this joint can not exchange with the API standard tool joint, and inconvenient oil drilling is on-the-spot to be used.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of metal hermetic seal simple in structure, ingenious, rational to revolve the tool joint of shoulder formula, this tool joint structure is simple relatively, easy to install, good sealing effect has prolonged the application life of tool joint, reduces use cost, applied widely, safe and reliable.
The technical scheme that provides according to the utility model: the tool joint of shoulder formula is revolved in a kind of metal hermetic seal, comprise the external thread piece and the inner thread piece that are threaded togather, described external thread piece has circular bead surface in radially outer first an outer circular bead surface and radially inner first, is provided with axially extended external screw thread between the circular bead surface in the circular bead surface and first outside first on external thread piece; Described inner thread piece has circular bead surface in radially outer second an outer circular bead surface and radially inner second, is provided with axially extended internal thread between the circular bead surface in the circular bead surface and second outside second on inner thread piece; It is characterized in that: in first, be disposed with spherical metal sealing surface and the face of cylinder between circular bead surface and the external screw thread; Be provided with the cone-shape metallic leak-proof face in second between circular bead surface and the internal thread, described cone-shape metallic leak-proof face and spherical metal sealing surface form interference and are sealed and matched.
As further improvement of the utility model, the distance L of the described face of cylinder and external thread piece inwall is 4mm-8mm.
As further improvement of the utility model, the length on the described face of cylinder is 10mm-20mm.
As further improvement of the utility model, the radial interference amount is 0.05mm-0.25mm between described cone-shape metallic leak-proof face and spherical metal sealing surface.
As further improvement of the utility model, the radian of described spherical metal sealing surface circular arc is 15 °.
The utility model compared with prior art, advantage is: when this practical external thread piece is threaded with inner thread piece, be sealed and matched by spherical metal sealing surface and the interference of cone-shape metallic leak-proof face, and the face of cylinder and the distance of external thread piece inwall and the distance (length on the face of cylinder) of external thread piece end and external screw thread front end on the control external thread piece, not only can improve sealability, can also realize exchanging with API standard drilling rod.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is API standard tool joint structural representation.
Fig. 3 is the structural representation that the utility model female end and API modular connection male end are exchanged.
Fig. 4 is the structural representation that the utility model male end and API modular connection female end are exchanged.
Fig. 5 is the utility model external thread piece end construction enlarged diagram.
The specific embodiment
The utility model is described in further detail below in conjunction with concrete drawings and Examples.
As shown in Figure 1, comprise circular bead surface 5 in external thread piece 1, the first outer circular bead surface 2, external screw thread 3, the spherical metal sealing surface 4, first, inner thread piece 6, the second interior circular bead surface 7, cone-shape metallic leak-proof face 8, internal thread 9, the second outer circular bead surface 10, the face of cylinder 11 etc.
As shown in Figure 1, the utility model is that the tool joint of shoulder formula is revolved in a kind of metal hermetic seal, comprise the external thread piece 1 and the inner thread piece 6 that are threaded togather, described external screw thread 3 is consistent with the API standard external, namely, external screw thread 3 parameters: thread taper, pitch, tooth depth, tooth form angle, in through etc. consistent with the API standard external, external thread piece 1 has circular bead surface 5 in radially outer first an outer circular bead surface 2 and radially inner first; Described internal thread 9 is consistent with the API standard female, be internal thread 9 parameters comprise thread taper, pitch, tooth depth, tooth form angle, in through etc. consistent with the API standard female, on external thread piece 1, be provided with axially extended external screw thread 3 between the circular bead surface 5 in the circular bead surface 2 and first outside first; Inner thread piece 6 has circular bead surface 7 in radially outer second an outer circular bead surface 10 and radially inner second, is provided with axially extended internal thread 9 between the circular bead surface 7 in the circular bead surface 10 and second outside second on inner thread piece 6; In first, be disposed with spherical metal sealing surface 4 and the face of cylinder 11 between circular bead surface 5 and the external screw thread 3; Be provided with cone-shape metallic leak-proof face 8 between circular bead surface 7 and the internal thread 9 in second, described cone-shape metallic leak-proof face 8 forms interference with spherical metal sealing surface 4 and is sealed and matched.
The described face of cylinder 11 is 4mm-8mm with the distance L of external thread piece 1 inwall.
The length on the described face of cylinder 11 is 10mm-20mm, and external thread piece 1 end and API standard female produce and interfere when avoiding exchanging, and satisfy the requirement of exchanging with the API standard tool joint.
4 radial interference amounts of described cone-shape metallic leak-proof face 8 and spherical metal sealing surface are 0.05mm-0.25mm.
The radian of described spherical metal sealing surface 4 circular arcs is 15 °.
Select the NC38 standard tool joint for use, its external diameter is 120.7mm, internal diameter is 68.26mm, distance L between specification the utility model of the same race joint face of cylinder and external thread piece 1 inwall be 5mm and external thread piece end and external screw thread 3 front ends be 16mm apart from S, the maximum interference amount of metal interference sealed diameter direction is 0.2mm.As shown in Figure 3 and Figure 4, Fig. 3 is the structural representation that the utility model female end and API modular connection male end are exchanged, and Fig. 4 is the structural representation that the utility model male end and API modular connection female end are exchanged.
When this practical external thread piece is threaded with inner thread piece, be sealed and matched by spherical metal sealing surface and the interference of cone-shape metallic leak-proof face, and the face of cylinder and the distance of external thread piece inwall and the distance (length on the face of cylinder) of external thread piece end and external screw thread front end on the control external thread piece, not only can improve sealability, can also realize exchanging with API standard drilling rod.

Claims (5)

1. the tool joint of shoulder formula is revolved in a metal hermetic seal, comprise the external thread piece (1) and the inner thread piece (6) that are threaded togather, described external thread piece (1) has radially outer first an outer circular bead surface (2) and one radially inner first interior circular bead surface (5), is provided with axially extended external screw thread (3) outside external thread piece (1) last first in the circular bead surface (2) and first between the circular bead surface (5); Described inner thread piece (6) has radially outer second an outer circular bead surface (10) and one radially inner second interior circular bead surface (7), is provided with axially extended internal thread (9) outside inner thread piece (6) last second in the circular bead surface (10) and second between the circular bead surface (7); It is characterized in that: be disposed with spherical metal sealing surface (4) and the face of cylinder (11) between circular bead surface in first (5) and the external screw thread (3); Be provided with cone-shape metallic leak-proof face (8) between circular bead surface in second (7) and the internal thread (9), described cone-shape metallic leak-proof face (8) forms interference with spherical metal sealing surface (4) and is sealed and matched.
2. the tool joint of shoulder formula is revolved in metal hermetic seal as claimed in claim 1, it is characterized in that: the described face of cylinder (11) are 4mm-8mm with the distance L of external thread piece (1) inwall.
3. the tool joint of shoulder formula is revolved in metal hermetic seal as claimed in claim 1, it is characterized in that: the length of the described face of cylinder (11) is 10mm-20mm.
4. the tool joint of shoulder formula is revolved in metal hermetic seal as claimed in claim 1, it is characterized in that: the radial interference amount is 0.05mm-0.25mm between described cone-shape metallic leak-proof face (8) and spherical metal sealing surface (4).
5. the tool joint of shoulder formula is revolved in metal hermetic seal as claimed in claim 1, it is characterized in that: the radian of described spherical metal sealing surface (4) circular arc is 15 °.
CN 201320096700 2013-03-01 2013-03-01 Metal air-tight seal rotary bead type drill rod joint Expired - Fee Related CN203201491U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320096700 CN203201491U (en) 2013-03-01 2013-03-01 Metal air-tight seal rotary bead type drill rod joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320096700 CN203201491U (en) 2013-03-01 2013-03-01 Metal air-tight seal rotary bead type drill rod joint

Publications (1)

Publication Number Publication Date
CN203201491U true CN203201491U (en) 2013-09-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320096700 Expired - Fee Related CN203201491U (en) 2013-03-01 2013-03-01 Metal air-tight seal rotary bead type drill rod joint

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103556955A (en) * 2013-11-01 2014-02-05 南通永大管业股份有限公司 Sealing part structure for high sealing performance oil pipe
CN104074472A (en) * 2014-07-22 2014-10-01 江苏和信石油机械有限公司 Ultra torsion resistance multi-shoulder full-enclosed taper pipe thread connecting device
CN106194052A (en) * 2016-09-05 2016-12-07 天津钢管集团股份有限公司 High-performance nipple special buckle oil well pipe metal to metal seal structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103556955A (en) * 2013-11-01 2014-02-05 南通永大管业股份有限公司 Sealing part structure for high sealing performance oil pipe
CN103556955B (en) * 2013-11-01 2016-08-17 南通永大管业股份有限公司 A kind of sealing structure of high leakproofness oil pipe
CN104074472A (en) * 2014-07-22 2014-10-01 江苏和信石油机械有限公司 Ultra torsion resistance multi-shoulder full-enclosed taper pipe thread connecting device
CN104074472B (en) * 2014-07-22 2015-05-13 江苏和信石油机械有限公司 Ultra torsion resistance multi-shoulder full-enclosed taper pipe thread connecting device
CN106194052A (en) * 2016-09-05 2016-12-07 天津钢管集团股份有限公司 High-performance nipple special buckle oil well pipe metal to metal seal structure

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C14 Grant of patent or utility model
GR01 Patent grant
PP01 Preservation of patent right

Effective date of registration: 20140922

Granted publication date: 20130918

RINS Preservation of patent right or utility model and its discharge
PD01 Discharge of preservation of patent

Date of cancellation: 20150322

Granted publication date: 20130918

RINS Preservation of patent right or utility model and its discharge
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130918

Termination date: 20140301

EXPY Termination of patent right or utility model