CN107575169A - The joint processing method of oil well pipe and oil well pipe - Google Patents
The joint processing method of oil well pipe and oil well pipe Download PDFInfo
- Publication number
- CN107575169A CN107575169A CN201710737165.0A CN201710737165A CN107575169A CN 107575169 A CN107575169 A CN 107575169A CN 201710737165 A CN201710737165 A CN 201710737165A CN 107575169 A CN107575169 A CN 107575169A
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- Prior art keywords
- oil well
- well pipe
- pin thread
- box portion
- pipe
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- 239000003129 oil well Substances 0.000 title claims abstract description 91
- 238000003672 processing method Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 73
- 230000008569 process Effects 0.000 claims abstract description 44
- 238000012545 processing Methods 0.000 claims description 42
- 230000008719 thickening Effects 0.000 description 8
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides the joint processing method of a kind of oil well pipe and oil well pipe, oil well pipe includes pipe main body, and oil well pipe also includes：Pin thread portion, pin thread portion are arranged on one end of pipe main body；Box portion, box portion are arranged on the other end of pipe main body；Wherein, pin thread portion is process by necking down process, to be plugged in the box portion of a corresponding oil well pipe；And/or box portion is process by enlarging technique, to be set in the pin thread portion of another corresponding oil well pipe.Oil well pipe in the present invention solves the problems, such as that the method cost that the joint of the prior art to oil well pipe is processed is higher.
Description
Technical field
The present invention relates to oil well pipe manufacture field, in particular to the joint processing side of a kind of oil well pipe and oil well pipe
Method.
Background technology
At present, oil field ensures the oil well of cementing quality, and slim hole well and windowing side for needing to increase annular clearance
Drilling well, direct-connected type joint can be typically selected, i.e., pin thread, other end processing box, two branch pipe body phases are processed in body both ends one end
The external diameter of connecting portion joint is identical with outer tube diameter or slightly larger than body, the internal diameter and internal diameter of tube body of connecting portion joint when even
Same as or slightly smaller than body.
Direct-connected type joint is due to being that male and female button is directly processed on body, to the dimension precision requirement of body both ends pipe end
Compare it is high, if directly in tube end maching screw thread, when processing pin end sealing structure and box end shoulder structure, the internal diameter of pipe end
Its processing dimension requirement is not reached with outside dimension, in order to solve this problem, existing method is used to body pipe end
Carry out internal-external thickening processing.Thickening processing need to be equipped with thickening machine and thickening mould, and thickening machine and thickening mould input cost are high.Add
Thickness processing need to be repeatedly molded, complex process.Also, to because of the underproof body of screw thread process, thickening need to be re-started to pipe end,
Thickening processing after also need heat treatment is re-started to body, efficiency is low, cost is high.
The content of the invention
It is a primary object of the present invention to provide a kind of joint processing method of oil well pipe and oil well pipe, to solve existing skill
The problem of method cost being processed to the joint of oil well pipe in art is higher.
To achieve these goals, according to an aspect of the invention, there is provided a kind of oil well pipe, including pipe main body, oil
Well casing also includes：Pin thread portion, pin thread portion are arranged on one end of pipe main body；Box portion, box portion are arranged on the other end of pipe main body；
Wherein, pin thread portion is process by necking down process, to be plugged in the box portion of a corresponding oil well pipe；And/or box portion
It is process by enlarging technique, to be set in the pin thread portion of another corresponding oil well pipe.
Further, pin thread portion is process by necking down process, and the span of the necking angle in pin thread portion is 1 degree to 7
Degree.
Further, the span of pin thread minister degree is 10mm to 100mm.
Further, box portion is process by enlarging technique, and the span of the flaring angle in box portion is 1 degree to 7
Degree.
Further, the span of box minister degree is 10mm to 100mm.
Further, external screw thread is provided with the outer wall in pin thread portion, is provided with the inwall in box portion and is mutually fitted with external screw thread
The internal thread matched somebody with somebody.
Further, first shoulder structure is formed between the outer wall in pin thread portion and the outer wall of pipe main body；The inwall in box portion
The second shoulder structure is formed between the inwall of pipe main body.
According to another aspect of the present invention, there is provided a kind of joint processing method of oil well pipe, suitable for above-mentioned oil
Well casing, joint processing method include：Necking processing is carried out to the pin thread portion of oil well pipe, so that pin thread portion inserts a corresponding oil
In the box portion of well casing；And/or enlarging processing is carried out to the box portion of oil well pipe, so that pin thread portion is enclosed on another corresponding oil
In the pin thread portion of well casing.
Further, joint processing method also includes：After necking processing is carried out to pin thread portion, on the outer wall in pin thread portion
Process the external screw thread for being connected with box portion.
Further, joint processing method also includes：After expanding is carried out to box portion, on the inwall in box portion
Process the internal thread for being connected with pin thread portion.
Oil well pipe in the present invention includes pipe main body and is arranged on the pin thread portion and box portion at pipe main body both ends, oil well pipe peace
During dress, multiple oil well pipes are arranged successively, and the pin thread portion of each oil well pipe is connected with the box portion of its upstream or the oil well pipe in downstream,
The box portion of each oil well pipe is with downstream or the pin thread portion of the oil well pipe of upstream is connected, and then realizing between multiple oil well pipes
Assembling.Herein, pin thread portion is process by necking down process, and box portion is process by enlarging technique, this necking down process and expansion
Mouth technique can more easily process the pin thread portion of shrink mouth shape and the box portion of enlarging shape, and processing cost is relatively low, so as to solve
The problem of method cost that the joint of the prior art to oil well pipe is processed of having determined is higher.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the structural representation of one embodiment of the oil well pipe according to the present invention；And
Fig. 2 shows the structural representation of another embodiment of the oil well pipe according to the present invention.
Wherein, above-mentioned accompanying drawing marks including the following drawings：
10th, pipe main body；20th, pin thread portion；21st, external screw thread；22nd, first shoulder structure；23rd, the first sealing structure；30th, box
Portion；31st, internal thread；32nd, the second shoulder structure；33rd, second seals structure.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The invention provides a kind of oil well pipe, including pipe main body 10, Fig. 1 and Fig. 2 are refer to, oil well pipe also includes：Pin thread
Portion 20, pin thread portion 20 are arranged on one end of pipe main body 10；Box portion 30, box portion 30 are arranged on the other end of pipe main body 10；Its
In, pin thread portion 20 is process by necking down process, to be plugged in the box portion 30 of a corresponding oil well pipe；And/or box
Portion 30 is process by enlarging technique, to be set in the pin thread portion 20 of another corresponding oil well pipe.
Oil well pipe in the present invention includes pipe main body 10 and is arranged on the pin thread portion 20 and box portion 30 at the both ends of pipe main body 10,
When oil well pipe is installed, multiple oil well pipes are arranged successively, pin thread portion 20 and the oil well pipe in its upstream or downstream of each oil well pipe
Box portion 30 connects, the box portion 30 of each oil well pipe with downstream or the pin thread portion 20 of the oil well pipe of upstream is connected, Jin Ershi
Assembling between existing multiple oil well pipes.Herein, pin thread portion 20 is process by necking down process, and box portion 30 is processed by enlarging technique
Form, this necking down process and enlarging technique can more easily process the pin thread portion 20 of shrink mouth shape and the box of enlarging shape
Portion 30, processing cost is relatively low, higher so as to solve the method cost that the joint of the prior art to oil well pipe is processed
The problem of.
In the present embodiment, pin thread portion 20 is process by necking down process, the span of the necking angle in pin thread portion 20
For 1 degree to 7 degree.Preferably, the necking angle in pin thread portion 20 is 3 degree.So, another oil well pipe can more easily be inserted
Box portion 30 in.
In the present embodiment, the span of the length of pin thread portion 20 is 10mm to 100mm.Preferably, the length of pin thread portion 20
For 30mm.In this manner it is ensured that the connective stability with the box portion 30 of another oil well pipe.
In the present embodiment, box portion 30 is process by enlarging technique, the span of the flaring angle in box portion 30
For 1 degree to 7 degree.Preferably, the flaring angle in box portion 30 is 3 degree.So, another oil well can be more easily set in
In the pin thread portion 20 of pipe.
In the present embodiment, the span of the length of box portion 30 is 10mm to 100mm.Preferably, the length of box portion 30
For 20mm.In this manner it is ensured that the connective stability with the pin thread portion 20 of another oil well pipe.
In order to ensure the connective stability in pin thread portion 20 and box portion 30, as shown in Fig. 2 being set on the outer wall in pin thread portion 20
There is external screw thread 21, the internal thread 31 being adapted with external screw thread 21 is provided with the inwall in box portion 30.By making an oil well pipe
Pin thread portion 20 be threadedly coupled with the box portion 30 of another oil well pipe, can compare makes pin thread portion 20 be connected with box portion 30
It is more stable.
In the present embodiment, first shoulder structure 22 is formed between the outer wall in pin thread portion 20 and the outer wall of pipe main body 10；It is female
The second shoulder structure 32 is formed between the inwall of buckle 30 and the inwall of pipe main body 10.
In addition, the end set in pin thread portion 20 has the first sealing structure 23, the end set in box portion 30 has the second sealing
Structure 33.So, after pin thread portion 20 and box portion 30 connect, it is ensured that sealing between the two is preferable.
Present invention also offers a kind of joint processing method of oil well pipe, suitable for above-mentioned oil well pipe, joint processing side
Method includes：Necking processing is carried out to the pin thread portion of oil well pipe, so that pin thread portion is inserted in the box portion of a corresponding oil well pipe；
And/or enlarging processing is carried out to the box portion of oil well pipe, so that pin thread portion is enclosed in the pin thread portion of another corresponding oil well pipe.
Herein, pin thread portion 20 is process by necking down process, and box portion 30 is process by enlarging technique, this necking work
Skill and enlarging technique can more easily process the pin thread portion 20 of shrink mouth shape and the box portion 30 of enlarging shape, processing cost compared with
It is low, so as to solve the problems, such as that the method cost that the joint of the prior art to oil well pipe is processed is higher.
In the present embodiment, joint processing method also includes：After necking processing is carried out to pin thread portion, in the outer of pin thread portion
The external screw thread for being connected with box portion is processed on wall.
In the present embodiment, joint processing method also includes：After expanding is carried out to box portion, in box portion
The internal thread for being connected with pin thread portion is processed on wall.
In view of the shortcomings of the prior art, the invention provides a kind of direct-connected type joint (joints at oil well pipe both ends) of processing
Processing method.The processing method of this direct-connected type joint, necking processing, box end are carried out using to pin end (pin thread portion 20)
(box portion 30) carries out enlarging processing, then carries out screw thread process again, efficiency high simple using this processing method technique, processing
Cost is low.
Pin end necking processing is carried out on necking machine, is equipped with necking die according to specification, necking machine and necking die are thrown
It is low to enter cost.One-shot forming during necking, efficiency high.Body after necking is not required to be heat-treated again, and technique is simple.
As shown in figure 1, the male thread end reducing die necking angle [alpha] of pin end, α angles are according to the direct-connected type joint that need to be processed
Type is set, 1 °~7 ° of α scopes.Necking length L1, L1 are set according to the internal diameter requirement for the direct-connected type joint that need to be processed, L1
Scope 10mm~100mm.
Box end enlarging processing is carried out on pipe-expanding machine, is equipped with flaring die according to specification, pipe-expanding machine and flaring die are thrown
It is low to enter cost.One-shot forming during enlarging, efficiency high.Body after enlarging is not required to be heat-treated again, and technique is simple.
As shown in figure 1, box thread end flaring die flaring angle β, the β angle of box end is according to the direct-connected type joint that need to be processed
Type is set, 1 °~7 ° of β scopes.Necking length L2, L2 require to set according to the external diameter footpath for the direct-connected type joint that need to be processed,
L2 scopes 10mm~100mm.
D represents the outer warp of body in Fig. 1, and t represents body wall thickness.
The processing method of oil well pipe in the present invention compared with prior art the advantages of：
1st, by innovative approach, process is simplified, can effectively ensure product quality.
2nd, using this processing method, equipment is simple, and input cost is low, high to the treatment effeciency of body end, can be effective
Production cost is saved.
Illustrated with reference to specific implementation experiment：
Embodiment one
Some type of 88.90 × 6.45mm of specification, grade of steel L80-1 direct linkage type joint pipe body are handled, specific place
Reason method is as follows：
The necking processing of pipe end one end, necking angle [alpha] is 3 °, and necking length L1 is 30mm.
Other end enlarging is handled, and flaring angle β is 3 °, and enlarging length L2 is 20mm.
Using the body after this processing method, necking end outside dimension at pipe end is 85.76mm, and internal diameter size is
72.86mm, 3 ° of necking angle, this size meet the size requirement of processing the type direct linkage type pin thread.Flared end is at pipe end
Outside dimension is 91.00mm, internal diameter size 78.10mm：3 ° of flaring angle, this size meet processing the type direct linkage type box
Size requirement.
If necking end is after pin thread is processed, or flared end is unqualified in processing box rear joint processing, by unqualified joint
Excision, corresponding necking or enlarging are carried out after excision to pipe end and is handled, is not required to be heat-treated after processing, can directly carry out screw thread
Processing.
Embodiment two
The present embodiment to some type of 177.80 × 8.05mm of specification, grade of steel N80-1 direct linkage type joint pipe body at
Reason, specific processing method are as follows：
The necking processing of pipe end one end, necking angle [alpha] is 1.79 °, and necking length L1 is 50mm.
Other end enlarging is handled, and flaring angle β is 1.79 °, and enlarging length L2 is 40mm.
Using the body after this processing method, necking end outside dimension at pipe end is 174.67mm, and internal diameter size is
158.57mm：, 1.79 ° of necking angle, the size requirement of this size satisfaction processing the type direct linkage type pin thread.Flared end is close to pipe
Outside dimension is at end：180.30mm, internal diameter size 164.20mm, 1.79 ° of flaring angle, this size meet processing the type
The size requirement of direct linkage type box thread.
If necking end is after pin thread is processed, or flared end is unqualified in processing box rear joint processing, by unqualified joint
Excision, corresponding necking or enlarging are carried out after excision to pipe end and is handled, is not required to be heat-treated after processing, can directly carry out screw thread
Processing.
As can be seen from the above description, the above embodiments of the present invention realize following technique effect：
Oil well pipe in the present invention includes pipe main body 10 and is arranged on the pin thread portion 20 and box portion 30 at the both ends of pipe main body 10,
When oil well pipe is installed, multiple oil well pipes are arranged successively, pin thread portion 20 and the oil well pipe in its upstream or downstream of each oil well pipe
Box portion 30 connects, the box portion 30 of each oil well pipe with downstream or the pin thread portion 20 of the oil well pipe of upstream is connected, Jin Ershi
Assembling between existing multiple oil well pipes.Herein, pin thread portion 20 is process by necking down process, and box portion 30 is processed by enlarging technique
Form, this necking down process and enlarging technique can more easily process the pin thread portion 20 of shrink mouth shape and the box of enlarging shape
Portion 30, processing cost is relatively low, higher so as to solve the method cost that the joint of the prior art to oil well pipe is processed
The problem of.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of oil well pipe, including pipe main body (10), it is characterised in that the oil well pipe also includes：
Pin thread portion (20), the pin thread portion (20) are arranged on one end of the pipe main body (10)；
Box portion (30), the box portion (30) are arranged on the other end of the pipe main body (10)；
Wherein, the pin thread portion (20) is process by necking down process, to be plugged in the box portion of a corresponding oil well pipe
(30) in；And/or the box portion (30) is process by enlarging technique, to be set in the public affairs of another corresponding oil well pipe
On buckle (20).
2. oil well pipe according to claim 1, it is characterised in that the pin thread portion (20) is process by necking down process,
The span of the necking angle of the pin thread portion (20) is 1 degree to 7 degree.
3. oil well pipe according to claim 1, it is characterised in that the span of pin thread portion (20) length is 10mm
To 100mm.
4. oil well pipe according to claim 1, it is characterised in that the box portion (30) is process by enlarging technique,
The span of the flaring angle of the box portion (30) is 1 degree to 7 degree.
5. oil well pipe according to claim 1, it is characterised in that the span of box portion (30) length is 10mm
To 100mm.
6. oil well pipe according to claim 1, it is characterised in that be provided with external screw thread on the outer wall of the pin thread portion (20)
(21) internal thread (31) being adapted with the external screw thread (21), is provided with the inwall of the box portion (30).
7. oil well pipe according to claim 1, it is characterised in that the outer wall of the pin thread portion (20) and the pipe main body
(10) first shoulder structure (22) is formed between outer wall；The inwall of the box portion (30) and the inwall of the pipe main body (10)
Between form the second shoulder structure (32).
A kind of 8. joint processing method of oil well pipe, suitable for the oil well pipe any one of claim 1 to 7, its feature
It is, the joint processing method includes：
Necking processing is carried out to the pin thread portion of oil well pipe, so that the pin thread portion inserts the box portion of a corresponding oil well pipe
It is interior；And/or
Enlarging processing is carried out to the box portion of the oil well pipe, so that the pin thread portion is enclosed on the public affairs of another corresponding oil well pipe
On buckle.
9. joint processing method according to claim 8, it is characterised in that the joint processing method also includes：
After necking processing is carried out to the pin thread portion, processed on the outer wall in the pin thread portion for being connected with the box portion
External screw thread.
10. joint processing method according to claim 8 or claim 9, it is characterised in that the joint processing method also includes：
After expanding is carried out to the box portion, processed on the inwall in the box portion for being connected with the pin thread portion
Internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710737165.0A CN107575169A (en) | 2017-08-24 | 2017-08-24 | The joint processing method of oil well pipe and oil well pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710737165.0A CN107575169A (en) | 2017-08-24 | 2017-08-24 | The joint processing method of oil well pipe and oil well pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107575169A true CN107575169A (en) | 2018-01-12 |
Family
ID=61035373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710737165.0A Pending CN107575169A (en) | 2017-08-24 | 2017-08-24 | The joint processing method of oil well pipe and oil well pipe |
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| Country | Link |
|---|---|
| CN (1) | CN107575169A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040251686A1 (en) * | 2003-06-10 | 2004-12-16 | Otten Gregory K. | Multi-taper and multi-pitch diameter API eight round thread coupling |
| CN101270445A (en) * | 2007-03-23 | 2008-09-24 | 宝山钢铁股份有限公司 | Steel for heat-resistant and heat-insulated oil pipe, heat-insulated oil pipe and manufacturing method thereof |
| CN202706935U (en) * | 2012-07-12 | 2013-01-30 | 唐山市金石超硬材料有限公司 | Drill rod structure with reinforced end part |
| CN102937005A (en) * | 2012-12-04 | 2013-02-20 | 江苏常宝普莱森钢管有限公司 | Steel pipe direct-connection and rotary-connection lengthening structure with threaded and radial sealing |
| CN203052018U (en) * | 2012-12-04 | 2013-07-10 | 江苏瑞腾涂装科技有限公司 | Metal tube connection kit |
-
2017
- 2017-08-24 CN CN201710737165.0A patent/CN107575169A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040251686A1 (en) * | 2003-06-10 | 2004-12-16 | Otten Gregory K. | Multi-taper and multi-pitch diameter API eight round thread coupling |
| CN101270445A (en) * | 2007-03-23 | 2008-09-24 | 宝山钢铁股份有限公司 | Steel for heat-resistant and heat-insulated oil pipe, heat-insulated oil pipe and manufacturing method thereof |
| CN202706935U (en) * | 2012-07-12 | 2013-01-30 | 唐山市金石超硬材料有限公司 | Drill rod structure with reinforced end part |
| CN102937005A (en) * | 2012-12-04 | 2013-02-20 | 江苏常宝普莱森钢管有限公司 | Steel pipe direct-connection and rotary-connection lengthening structure with threaded and radial sealing |
| CN203052018U (en) * | 2012-12-04 | 2013-07-10 | 江苏瑞腾涂装科技有限公司 | Metal tube connection kit |
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Application publication date: 20180112 |
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