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 PDF

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Publication number
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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CN
China
Prior art keywords
blank
forging
warm
forming
extrusion forming
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
CN201410171999.6A
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Chinese (zh)
Other versions
CN103962802A (en
Inventor
徐新成
田娇
袁鹏斌
周永其
杨向东
晏彬彬
赵旺初
李培耀
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.)
SHANGHAI HAILONG PETROLEUM PIPE MATERIAL INSTITUTE
Shanghai University of Engineering Science
Original Assignee
SHANGHAI HAILONG PETROLEUM PIPE MATERIAL INSTITUTE
Shanghai University of Engineering Science
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Application filed by SHANGHAI HAILONG PETROLEUM PIPE MATERIAL INSTITUTE, Shanghai University of Engineering Science filed Critical SHANGHAI HAILONG PETROLEUM PIPE MATERIAL INSTITUTE
Priority to CN201410171999.6A priority Critical patent/CN103962802B/en
Publication of CN103962802A publication Critical patent/CN103962802A/en
Application granted granted Critical
Publication of CN103962802B publication Critical patent/CN103962802B/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02Die forging; Trimming by making use of special dies ; Punching during forging
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P2700/00Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
    • B23P2700/11Joints, e.g. ball joints, universal joints
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02Couplings; joints
    • E21B17/04Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042Threaded

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

A kind of warm-extrusion forming technique of petroleum drilling rod female adapter
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.
CN201410171999.6A 2014-04-25 2014-04-25 Warm extrusion forming process of internal thread joint of petroleum drill rod Expired - Fee Related CN103962802B (en)

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

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CN103962802B true CN103962802B (en) 2017-04-19

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
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

Family Cites Families (6)

* Cited by examiner, † Cited by third party
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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