CN103962802B - Warm extrusion forming process of internal thread joint of petroleum drill rod - Google Patents
Warm extrusion forming process of internal thread joint of petroleum drill rod Download PDFInfo
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- CN103962802B CN103962802B CN201410171999.6A CN201410171999A CN103962802B CN 103962802 B CN103962802 B CN 103962802B CN 201410171999 A CN201410171999 A CN 201410171999A CN 103962802 B CN103962802 B CN 103962802B
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- Prior art keywords
- blank
- forging
- warm
- extrusion forming
- drilling rod
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000003208 petroleum Substances 0.000 title claims abstract description 26
- 238000000304 warm extrusion Methods 0.000 title claims abstract description 25
- 238000005242 forging Methods 0.000 claims abstract description 45
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000004080 punching Methods 0.000 claims abstract description 8
- 239000000314 lubricant Substances 0.000 claims abstract description 6
- 238000003618 dip coating Methods 0.000 claims abstract description 4
- 238000005553 drilling Methods 0.000 claims description 27
- 238000007493 shaping process Methods 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 238000010791 quenching Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
- 235000007164 Oryza sativa Nutrition 0.000 claims description 4
- 235000009566 rice Nutrition 0.000 claims description 4
- 229910001339 C alloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 14
- 238000001125 extrusion Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000003754 machining Methods 0.000 abstract description 6
- 238000007254 oxidation reaction Methods 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000005520 cutting process Methods 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 2
- 230000006698 induction Effects 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000005422 blasting Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 241000209094 Oryza Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 210000001215 vagina Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/11—Joints, e.g. ball joints, universal joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B17/042—Threaded
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention belongs to the technical field of metal plastic forming, and particularly relates to a warm extrusion forming process of an internal thread joint of a petroleum drill rod. The forming process comprises the following steps of (1) cutting, (2), surface cleaning, (3), lubricating agent dip-coating, (4) induction heating, (5) warm extrusion forming of a prefabricated blank, (6), warm extrusion forming of a forging, (7), wad punching, (8), heat treatment, (9), machining and (10), appearance coating. In the forming process, the metal plastic performance of the blank is improved under the action of three-direction pressure stress, the metal internal streamline is improved, the quality and mechanical property of the forging are improved from the microstructure, and the quality of the prefabricated blank and the forging is improved. According to the forming process, strong oxidization is not generated, extrusion is carried out through a mold, the blank is formed, the utilization rate of raw materials is improved, the manufacturing period is shortened, the oxidization degree of the metal blank and the deformation after blank forming are reduced, the quality of the forging is improved, and production cost is lowered.
Description
Technical field
The invention belongs to metal forming technical field, more particularly to a kind of Warm Extrusion of petroleum drilling rod female adapter
Forming technology.
Background technology
With global energy supply shortage, Ge great industrial states are stepping up the probing to underground energies such as oil, natural gass
With exploitation production.It is more and more vigorous to the demand of drilling tool in oil exploitation, performance requirement more and more higher.Oil drilling tools are main
Be made up of drilling rod, adapter sleeve, regulator and drill collar etc., be primarily adapted for use in deep-well during oil-gas exploration and development, horizontal well and
The construction of extended reach well, work under bad environment, typically in hundreds of rice even underground activities of several kms, needs bear drawing, pressure,
The motive power such as turn round, rush, cutting, or even will also bear the mutation load of moment.Wherein joint of petroleum drill rod is oil drill rocker
Important connection member, wants Jing often to dismantle at drilling process center tap, and joint surface bears sizable tong gmatjpdumamicss, and
In drilling process, joint bears in itself the effect of the composite forces such as distortion, stretching, compression, and stress condition is complicated, so drilling rod connecting
Head is the weak link of oil drill rocker, and the material and mechanical property of butt joint blank have strict requirements, will to process choice
Seek also more and more higher.
Currently, the general forming process of joint of petroleum drill rod is that joint prefabricated blank, Jing are manufactured by way of machining
Sensing heating, finally by closed die forging extrusion molding.In order to ensure the shaping of deep hole forging, machining is adopted the manufacturing process
Increase forging surplus, the mode of remaining block to improve yield rate, increased amount of metal, so that stock utilization only reaches 20-
30%, while producing a large amount of waste materials, long the production cycle, production cost are high.And metal is machined, metal itself is destroyed
Streamline, reduce the forming property and mechanical property of metal, affect forging quality.Joint of petroleum drill rod material is high intensity conjunction
Jin Gang, this alloy rigidity is big, and intensity is high, and machined prefabricated blank could not improve the forming property of metal, to metal stream
The destruction of line style increased shaping difficulty.
Prefabricated blank shape and gross weight position have a significant impact to forging quality and forming process, the general prefabricated blank shape for adopting
Shape is two kinds, and one kind is that gross weight is located in the middle of prefabricated blank, causes forging bottom to be difficult to fill with；Another kind is that gross weight position is located in advance
Base bottom, causes load big, and stroke is long, and punch easily bends, and forging is easy to locking on punch.
The content of the invention
It is an object of the invention to provide a kind of warm-extrusion forming technique of petroleum drilling rod female adapter, this process increases
The utilization rate of raw material, the quality of forging and forming accuracy, extend the service life of petroleum drilling rod female adapter, reduce
Production cost.
The purpose of the present invention is realized by technical scheme once：
A kind of warm-extrusion forming technique of petroleum drilling rod female adapter, it is characterised in that：The forming technology includes following
Operation：(1) blanking；(2) surface clean；(3) dip-coating lubricant；(4) sensing heating；(5) warm-extrusion forming prefabricated blank；(6) temperature
Extrusion molding forging；(7) punching the wad；(8) heat treatment；(9) machine；(10) outward appearance application.
In the operation (1), according to the volume of petroleum drilling rod female adapter, by the circular rod that material is medium carbon alloy steel
Material is sawed into the blank that length is 4-6 rice.
In warm-extrusion forming technique, the requirement of dimensional accuracy and surface quality to extrusion is higher.So to carry out table
Face is cleared up, and the method for removing surface is using shot-blasting machine Shot Blasting.Blank after process answers surface finishing, without greasy dirt, tiny
The foreign body such as burr, surface is presented tiny pit, to be firmly attached lubricant.
In the operation (3), first blank is preheated to into 150-170 DEG C, then blank is immersed in into colloidal graphite mixed with water
In until formed one layer of uniform and thin graphite linings till.
In the operation (4), blank is put in intermediate frequency furnace and is heated to 800-900 DEG C.Preferably, blank is put into
850 DEG C are heated in intermediate frequency furnace.
In the operation (5), the blank for heating is put in the die cavity of ready made closed die forging extrusion die, into
Shape prefabricated blank.Closed die forging extrusion die is to carry out molding according to the prefabricated blank shape of wanted extrusion molding.
In the operation (6), prefabricated blank is put in the die cavity of ready made closed die forging extrusion die, forms forging
Part.Closed die forging extrusion die is to carry out molding according to the forging shape of wanted extrusion molding.
In the operation (8), the forging after punching the wad is put in quenching oil and is quickly cooled to room temperature, be then again heated to
550-650 DEG C, 3-5min is incubated, finally places in quenching oil and be cooled to room temperature.
In the operation (9), the forging after heat treatment is carried out rough turn, removal allowance, reprocess out spiral shell in forging
Stricture of vagina, is obtained petroleum drilling rod female adapter.
In the operation (10), petroleum drilling rod female adapter is carried out into plated film, paint, application process.
The invention has the beneficial effects as follows：
1st, the warm-extrusion forming technique of petroleum drilling rod female adapter of the invention, effect of the blank in three-dimensional compressive stress
Under, plastic deformation is improve, it is streamlined to improve metal inside, and forging quality and mechanical property are improve from microstructure, carries
High prefabricated blank quality, is conducive to the shaping of forging, also further increases the forming quality of forging.
2nd, this forming technology does not produce strong oxidation, is extruded by mould, realizes that blank shapes, and improves raw material
Utilization rate, shortens manufacturing cycle, and reduces the deflection after the degree of oxidation and blank shaping of metal stock, improves
Forging quality, reduces production cost.
3rd, evenly, ess-strain is reduced the Temperature Distribution of the forging of this forming technology, and need not be carried out before processing
The annealing heat-treats of blank, technique is easier.
4th, the surface quality of the petroleum drilling rod female adapter obtained by the forming technology of the present invention is good, high precision, material
Material utilization rate is high, and mold use life-span length, low cost.
Description of the drawings
Fig. 1 is the forming process figure using the petroleum drilling rod female adapter in forming technology of the present invention, wherein under (a) is
Material shaping figure, is (b) the shaping figure of warm-extrusion forming prefabricated blank, is (c) the shaping figure of warm-extrusion forming forging, (d) is connected for punching
The shaping figure of skin, is (e) machining shaping figure.
Fig. 2 is a kind of process flow diagram of the warm-extrusion forming technique of petroleum drilling rod female adapter of the invention.
Specific embodiment
With reference to embodiment, the invention will be further described：
Embodiment 1
(1) blanking, the size of its blank is calculated according to the volume of specified petroleum drilling rod female adapter, selectes circle
The 37CrMnMo medium carbon alloy steels in section are raw material, adopt scale band saw sawing length to be blank for the circular bar of 4-6 rice
Length.Shown in the concrete figure (a) as in Fig. 1.
(2) surface clean, Warm Extrusion is that a kind of metal material is few without the forming technology for cutting, the dimensional accuracy to extrusion
It is higher with the requirement of surface quality.So needing to clear up blank surface so that greasy dirt, burr, the oxidation of blank surface can be removed
Skin and dirt etc..The method of the removing surface in this operation adopts shot-blasting machine Shot Blasting, the blank after process to answer surface finishing,
Without the foreign body such as greasy dirt and tiny burr, surface is presented tiny pit, to be firmly attached lubricant.
(3) dip-coating lubricant, by the blank for cleaning up 160 DEG C are preheated to, and are then submerged in colloidal graphite mixed with water, are made
Obtain blank surface and form one layer of uniform and thin graphite linings, prevent oxidation during blank heating.
(4) sensing heating, by removing surface and scribble graphite blank load barrel, subsequently into Medium Frequency Induction Heating Furnace
Inside preheated, heat penetration is come out of the stove to 850 DEG C after insulation 3-5min.
(5) warm-extrusion forming prefabricated blank, by preheated blank the shape of the prefabricated blank previously according to required shaping is put into
And direct forming prefabricated blank in the die cavity of the closed die forging temperature extension mould for designing.Carried out using cooling back installation in mould cold
But.Shown in the concrete figure (b) as in Fig. 1.
(6) warm-extrusion forming forging, by the prefabricated blank of shaping the closing for designing previously according to required forging shape is put into
Direct forming forging in the die cavity of formula die forging temperature extension mould.Cooled down using cooling back installation in mould.In concrete such as Fig. 1
Figure (c) shown in
(7) punching the wad, removes gross weight on the hydraulic press equipped with perforating die.Shown in the concrete figure (d) as in Fig. 1.
(8) heat treatment, the forging after punching the wad is put in quenching oil to carry out being quickly cooled to room temperature, then forging is heated
To 600 DEG C, 3-5min is incubated, places in quenching oil and cool down.
(9) machine, it is rough turn：Forging after heat treatment is carried out into rough turn, removal allowance on lathe, size is reached
Require；Cutting thread：Forging female thread is processed by required precision in internal thread machining lathe, oil drill rocker female thread is obtained and is connect
Head.Shown in the concrete figure (e) as in Fig. 1.
(10) outward appearance application, carries out petroleum drilling rod female adapter the applications such as plated film, paint and processes.
Fig. 2 is a kind of process flow diagram of the warm-extrusion forming technique of petroleum drilling rod female adapter of the invention.
Compared with machining shaping technique, blank is in impression in three-dimensional compressive stress state for the forming technology of the present invention
Under so that intensity, plasticity of part etc. are significantly improved, and organize finer and close, and with streamlined, and raw material
Utilization rate is improved, low production cost.
The gross weight of the prefabricated blank of the present invention is in centre position, it is to avoid punch long brought harm.Forging can be improved
Quality, reduces ess-strain, improve metal flow situation, and can shorten stroke, it is therefore prevented that actual production convex mould bending shows
As improve the mold use life-span.
Above-described embodiment is interpreted as being merely to illustrate the present invention rather than limits the scope of the invention.Reading
After the content of record of the present invention, those skilled in the art can make various changes or modifications to the present invention, these equivalent changes
Change and modification equally falls into the scope of the claims in the present invention.
Claims (5)
1. the warm-extrusion forming technique of a kind of petroleum drilling rod female adapter, it is characterised in that：The forming technology includes following work
Sequence：(1) blanking；(2) surface clean；(3) dip-coating lubricant；(4) sensing heating；(5) warm-extrusion forming prefabricated blank；(6) warm extrusion
It is pressed into shape Forging；(7) punching the wad；(8) heat treatment；(9) machine；(10) outward appearance application；
In the operation (3), first blank is preheated to into 150-170 DEG C, then blank is immersed in colloidal graphite mixed with water directly
One layer of uniform and thin graphite linings being formed to blank surface；
In the operation (5), the blank for heating is put in the die cavity of ready made closed die forging temperature extension mould, is shaped
Prefabricated blank；
In the operation (6), prefabricated blank is put in the die cavity of ready made closed die forging temperature extension mould, shaping gross weight exists
Middle forging.
2. the warm-extrusion forming technique of petroleum drilling rod female adapter according to claim 1, it is characterised in that：The work
In sequence (1), according to the volume of petroleum drilling rod female adapter, material is sawed into into length for the circular bar of medium carbon alloy steel is
The blank of 4-6 rice.
3. the warm-extrusion forming technique of petroleum drilling rod female adapter according to claim 1, it is characterised in that：The work
In sequence (4), blank is put in intermediate frequency furnace and is heated to 800-900 DEG C.
4. the warm-extrusion forming technique of petroleum drilling rod female adapter according to claim 1, it is characterised in that：The work
In sequence (8), the forging after punching the wad is put in quenching oil and is quickly cooled to room temperature, be then again heated to 550-650 DEG C, insulation
3-5min, finally places in quenching oil and is cooled to room temperature.
5. the warm-extrusion forming technique of petroleum drilling rod female adapter according to claim 1, it is characterised in that：The work
In sequence (9), the forging after heat treatment is carried out rough turn, removal allowance, reprocess out forging female thread, oil drill rocker is obtained
Female adapter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410171999.6A CN103962802B (en) | 2014-04-25 | 2014-04-25 | Warm extrusion forming process of internal thread joint of petroleum drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410171999.6A CN103962802B (en) | 2014-04-25 | 2014-04-25 | Warm extrusion forming process of internal thread joint of petroleum drill rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103962802A CN103962802A (en) | 2014-08-06 |
| CN103962802B true CN103962802B (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410171999.6A Expired - Fee Related CN103962802B (en) | 2014-04-25 | 2014-04-25 | Warm extrusion forming process of internal thread joint of petroleum drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103962802B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493033B (en) * | 2014-10-31 | 2016-08-17 | 西北有色金属研究院 | A kind of integral forming technique of TC4 titanium alloy jet pipe |
| CN104668300B (en) * | 2015-01-30 | 2018-04-27 | 深圳市江为五金螺丝有限公司 | Aluminum alloy extrusion processing technology |
| CN104759847A (en) * | 2015-03-31 | 2015-07-08 | 常州大学 | Thermal extruding forming method and device for chain wheel |
| CN105327961B (en) * | 2015-10-23 | 2018-03-02 | 成都现代万通锚固技术有限公司 | A kind of connector female thread machining method of spiral anchor rod |
| CN105689611B (en) * | 2016-03-06 | 2018-08-21 | 江苏海宇机械有限公司 | A kind of single head hub splines processing technology |
| CN107350752A (en) * | 2017-08-30 | 2017-11-17 | 如皋市双亚环保科技有限公司 | A kind of processing method of valve member |
| CN109604488B (en) * | 2018-12-21 | 2020-11-03 | 哈尔滨理工大学 | Extrusion processing method of magnesium alloy AZ91D internal thread |
| CN111069289B (en) * | 2019-12-09 | 2024-08-09 | 江苏朗瑞精锻有限公司 | Steel pipe perforating plug and manufacturing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1187531A (en) * | 1981-03-26 | 1985-05-21 | Ernest P. Garratt | Composite threaded tubular connector |
| CN1208144C (en) * | 2001-02-15 | 2005-06-29 | 华北工学院 | Gear precision plastic forming process and its forming mould |
| CN1317088C (en) * | 2003-07-10 | 2007-05-23 | 河南科技大学 | Precision forming method for spur gear |
| CN102896471B (en) * | 2012-10-22 | 2015-05-06 | 江苏和信石油机械有限公司 | Automatic production method of oil drill rod joints |
| CN103522024B (en) * | 2013-09-27 | 2016-04-13 | 盐城金刚星精密锻造有限公司 | The forming technology of middle large modulus roller gear and particular manufacturing craft thereof |
| CN103567247A (en) * | 2013-11-26 | 2014-02-12 | 山东建筑大学 | Novel warm extrusion method for efficiently processing internal-tooth cylindrical gears |
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2014
- 2014-04-25 CN CN201410171999.6A patent/CN103962802B/en not_active Expired - Fee Related
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| CN103962802A (en) | 2014-08-06 |
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