CN103962801B - A kind of forming technology of joint of petroleum drill rod - Google Patents
A kind of forming technology of joint of petroleum drill rod Download PDFInfo
- Publication number
- CN103962801B CN103962801B CN201410171985.4A CN201410171985A CN103962801B CN 103962801 B CN103962801 B CN 103962801B CN 201410171985 A CN201410171985 A CN 201410171985A CN 103962801 B CN103962801 B CN 103962801B
- Authority
- CN
- China
- Prior art keywords
- joint
- drill rod
- forming technology
- petroleum drill
- forging
- 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
Links
- 239000003208 petroleum Substances 0.000 title claims abstract description 37
- 238000005516 engineering process Methods 0.000 title claims abstract description 28
- 238000005242 forging Methods 0.000 claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims abstract description 10
- 238000007689 inspection Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000003754 machining Methods 0.000 claims abstract description 7
- 238000004080 punching Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 16
- 230000006698 induction Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 229910001339 C alloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 abstract description 14
- 239000002184 metal Substances 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 description 8
- 238000001192 hot extrusion Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004836 empirical method Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000003466 welding Methods 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention belongs to metal forming technical field, particularly to the forming technology of a kind of joint of petroleum drill rod, this forming technology includes following operation: (1) raw material quality is checked；(2) blanking；(3) jumping-up；(4) preheat；(5) preform；(6) removing surface；(7) two fire heating；(8) secondary extrusion shapes；(9) gross weight is cut in punching；(10) heat treatment；(11) forging quality inspection；(12) machining.The forming technology of the joint of petroleum drill rod of the present invention, employing substep shapes, and what often step used is all Closed Extrusion forming technology, and without determining the position of gross weight, so can save early investment fund when designing mould and time.The tapered end dense structure of the joint of petroleum drill rod of the shaping in this forming technology, improves the forming quality of tapered end, and the surface quality of the joint of petroleum drill rod obtained is good, and precision is high, and stock utilization is high, low cost.
Description
Technical field
The invention belongs to metal forming technical field, particularly to the shaping work of a kind of joint of petroleum drill rod
Skill.
Background technology
Along with the increase of drilling depth, mine operating mode is all the more severe, to the performance requirement of oil drilling tools increasingly
High.It is subjected to huge external and internal pressure during drilling tool work, reverses, bend and vibration etc., its quality,
Performance And Reliability, especially drill rod pipe end bonding strength, the safe and reliable work to drilling tool plays to closing weight
The effect wanted.The drill rod pipe end thickeied is connected to one piece with tool joint by the way of welding, drilling rod even
It is connected into an entirety, to reach desired depth, and moment of torsion can be transmitted, creep into transmission power for drill bit,
So, joint of petroleum drill rod is the joint of drilling rod.
Joint of petroleum drill rod forging mainly uses flat-die forging, point mould die forging, the two-way hot extrusion of horizontal parting etc.
Technique forging and molding.But although the joint forging part of free_forging process forming can forge centre bore forging matter
Measure poor, dimensional accuracy is low, there is forging trace on surface and poor quality, is reserved with bigger allowance.And
And production efficiency is low, resource utilization is low；Mould contour forging technique is divided to produce, although tool joint forging part surface
Quality is good, and dimensional accuracy is high, and centre bore forges, but forging outer surface axially has obvious parting line trace,
All having a surplus feed bin in termination, two ends, allowance is big, and stock utilization is relatively low；Horizontal parting two-way hot extrusion work
The forging consumptive material of skill is low, mechanical strength is higher, life, the coaxial accuracy of crowded blind hole significantly carry
High.But, in the two-way hot extrusion process of horizontal parting, the gross weight position of forging not only with tool joint two
The deformation extent of end is relevant, is also affected by factors such as the mobility of metal and mould structures, particularly drilling rod
Joint is the asymmetric parts in two ends, and during shaping, two ends deformation extent, different this of mould structure result in forging
Gross weight position is difficult to determine.And the determination of gross weight position at present is also formed without theory, empirical method can only be passed through
Constantly test is groped, and determines the position of gross weight.This means that the employing two-way hot extrusion technique of horizontal parting
Production cycle long, early investment fund is many, and in process of production for ensure forging quality often add
Big allowance, causes unnecessary waste.
The shaping of joint of petroleum drill rod tapered end is the difficult point that joint of petroleum drill rod shapes.Use freely
Forging, the joint of petroleum drill rod of point process forming such as mould die forging, the two-way hot extrusion of horizontal parting are all bored by increase
The allowance of shape end guarantees forming quality, not only wastes material, and affects the morphoplasm of forging
Amount.
Summary of the invention
It is an object of the invention to provide the forming technology of a kind of joint of petroleum drill rod, this process increases raw material
Utilization rate, the quality of forging and forming accuracy, extend the service life of joint of petroleum drill rod, reduce
Production cost.
The purpose of the present invention is realized by technical scheme once:
A kind of forming technology of joint of petroleum drill rod, it is characterised in that: this forming technology includes following operation:
(1) raw material quality inspection；(2) blanking；(3) jumping-up；(4) preheat；(5) preform；(6)
Removing surface；(7) two fire heating；(8) secondary extrusion shapes；(9) gross weight is cut in punching；(10) at heat
Reason；(11) forging quality inspection；(12) machining.
In described operation (1), raw material is the cylindrical bar of medium carbon alloy steel material, is entered by raw material
Row ultrasonic examination quality inspection.
In described operation (4), blank is placed in medium frequency electric induction heater and is heated to 1100-1200 DEG C.
Preferably, blank is placed in medium frequency electric induction heater and is heated to 1150 DEG C.
In described operation (5), pre-warmed blank is put into mold cavity hot-pressed, form stone
The tapered end of oil tool joint.
In described operation (7), the forging that removing surface is good is placed in medium frequency electric induction heater heating
To 1100-1200 DEG C.Preferably, the forging that removing surface is good is placed in medium frequency electric induction heater adds
Heat is to 1150 DEG C.
In described operation (8), the forging after heating is put into mold cavity the most hot-pressed, formed
Finish-forging part.
In described operation (10), finish-forging part is carried out modifier treatment.Modulating treatment process is: hardening heat
880 DEG C, temperature retention time 2.5h, oil is cold；Temperature 605-610 DEG C insulation 4h, water-cooled.
Machining in described operation (12) is, first car removes finish-forging part allowance, then car goes out tapered end
Screw thread, obtain required joint of petroleum drill rod.
The invention has the beneficial effects as follows:
1, the forming technology of the joint of petroleum drill rod of the present invention, uses substep to shape, and what often step used is all
Closed Extrusion forming technology, and without determining the position of gross weight, before so can saving when designing mould
Phase infusion of financial resources and time.
2, the tapered end of joint of petroleum drill rod shaped in the preform operation in this forming technology, the
Being acted on by three-dimensional compressive stress during secondary extrusion, its tissue will become finer and close, even can eliminate
Defect during one step forming, improves the forming quality of tapered end.
3, in the forming technology operation of the present invention, when forging is machined cutting thread, due to the shape of forging
Shape closer to part so that metal streamline is along conical distribution, and chip adds can reduce metal streamline dew man-hour
Head, is conducive to improving the intensity of screw thread at taper, extends the service life of joint of petroleum drill rod, save
Cost.
4, the surface quality of the joint of petroleum drill rod obtained by the forming technology of the present invention is good, and precision is high,
Stock utilization is high, low cost.
Accompanying drawing explanation
Fig. 1 is the forming process figure using the joint of petroleum drill rod in forming technology of the present invention, wherein (a)
Shaping figure for blanking, (b) is upsetting formation figure, and (c) is preformed shaping figure, and (d) is secondary extrusion
Shaping figure, (e) is that gross weight shaping figure is cut in punching, and (f) shapes figure for machining.
Fig. 2 is the process flow diagram of the forming technology of a kind of joint of petroleum drill rod of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1
(1) inspection of raw and process materials, is that 37CrMnMO medium carbon alloy steel material section carries out ultrasonic examination and looks into material
See if there is the defects such as micro-flaw, it is ensured that forging quality detection in subsequent handling.The shaping figure of this operation
As shown in the figure (a) in Fig. 1.
(2) blanking, according to the volume of joint of petroleum drill rod, choosing the bar that cross section is circular is blank,
Being cut to the long cylindrical bar of 5-8 rice on scale band saw equipment is blank.
(3) jumping-up, by the blank jumping-up in operation (1) to the blank of a diameter of 120mm.This operation
Shape figure as shown in the figure (b) in Fig. 1.
(4) preheat, the blank of jumping-up is heated in medium frequency electric induction heater, makes blank temperature reach
To 1150 DEG C.
(5) preform, puts into the mold cavity interior-heat on multi-ram forging hydraulic press by the blank preheated
Extrusion molding, forms the tapered end of joint of petroleum drill rod.Shaping of this operation is schemed such as the figure (c) in Fig. 1
Shown in.
(6) removing surface, employing shot-blasting machine Shot Blasting, the spalling of oxide film on the forging surface after process,
Any surface finish, prepares for extrusion molding.
(7) two fire heating, are placed in medium frequency electric induction heater the forging that removing surface is good and again add
Heat is to 1150 DEG C.
(8) secondary extrusion shapes, and the forging after heating is put into the mold cavity on multi-ram forging hydraulic press
The most hot-pressed, form finish-forging part.Shaping of this operation is schemed as shown in the figure (d) in Fig. 1.
(9) gross weight is cut in punching, is put on the perforating die being contained on hydraulic press by finish-forging part, washes out gross weight.
Shaping of this operation is schemed as shown in the figure (e) in Fig. 1.
(10) heat treatment, finish-forging part carries out modifier treatment, and hardening and tempering process is: hardening heat 880 DEG C, protects
Temperature time 2.5h oil is cold；Temperature 605-610 DEG C, is incubated 4h, water-cooled.
(11) forging quality inspection, utilizes ultrasonic examination, and detection forging is the most defective.
(12) machining, is machined as car and removes finish-forging part allowance, and car goes out the screw thread of tapered end,
Being 65.1mm to aperture, maximum outside diameter is the joint of petroleum drill rod of 127.2mm.The shaping figure of this operation such as figure
Shown in figure (f) in 1.
Fig. 2 is the process flow diagram of the forming technology of a kind of joint of petroleum drill rod of the present invention.
The present invention uses substep forming technology, is not required to determine the position of gross weight, the joint of petroleum drill rod of shaping
The tissue of tapered end is finer and closely woven, and intensity is high, good toughness.Finish-forging part machine cutting thread time, due to
The shape of forging is closer to the shape of part so that metal streamline is along conical distribution, and chip adds and can reduce man-hour
Metal streamline is appeared, and is conducive to improving the intensity of screw thread at taper, improves the life-span of oil drilling tools joint, and
And scrap rate reduces, save raw material.The joint of petroleum drill rod that the present invention shapes avoids overlap, impression,
Fill the defects such as deficiency.
Above-described embodiment is interpreted as being merely to illustrate the present invention rather than limiting the scope of the invention.
Read the present invention record content after, those skilled in the art the present invention can be made various change or
Amendment, these equivalence changes and modification fall into the scope of the claims in the present invention equally.
Claims (7)
1. the forming technology of a joint of petroleum drill rod, it is characterised in that: this forming technology includes following operation:
(1) raw material quality inspection；(2) blanking；(3) jumping-up；(4) preheat；(5) preform, will be pre-
It is hot-pressed that mold cavity put into by the blank of heating, forms the tapered end of joint of petroleum drill rod；(6) table
Face is cleared up；(7) two fire heating；(8) secondary extrusion shapes；(9) gross weight is cut in punching；(10) heat treatment；
(11) forging quality inspection；(12) machining.
The forming technology of joint of petroleum drill rod the most according to claim 1, it is characterised in that: described work
In sequence (1), raw material is the cylindrical bar of medium carbon alloy steel material, and raw material is carried out ultrasonic examination
Quality inspection.
The forming technology of joint of petroleum drill rod the most according to claim 1, it is characterised in that: described work
In sequence (4), blank is placed in medium frequency electric induction heater and is heated to 1100-1200 DEG C.
The forming technology of joint of petroleum drill rod the most according to claim 1, it is characterised in that: described work
In sequence (7), the forging that removing surface is good is placed in medium frequency electric induction heater and is heated to 1100-1200 DEG C.
The forming technology of joint of petroleum drill rod the most according to claim 1, it is characterised in that: described work
In sequence (8), the forging after heating is put into mold cavity the most hot-pressed, form finish-forging part.
The forming technology of joint of petroleum drill rod the most according to claim 1, it is characterised in that: described work
In sequence (10), finish-forging part being carried out modifier treatment, modulating treatment process is hardening heat 880 DEG C, during insulation
Between 2.5h, oil cold；Temperature 605-610 DEG C insulation 4h, water-cooled.
The forming technology of joint of petroleum drill rod the most according to claim 1, it is characterised in that: described work
Machining in sequence (12) is, first car removes finish-forging part allowance, then car goes out the screw thread of tapered end, obtains
Required joint of petroleum drill rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410171985.4A CN103962801B (en) | 2014-04-25 | 2014-04-25 | A kind of forming technology of joint of petroleum drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410171985.4A CN103962801B (en) | 2014-04-25 | 2014-04-25 | A kind of forming technology of joint of petroleum drill rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103962801A CN103962801A (en) | 2014-08-06 |
| CN103962801B true CN103962801B (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410171985.4A Expired - Fee Related CN103962801B (en) | 2014-04-25 | 2014-04-25 | A kind of forming technology of joint of petroleum drill rod |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889686A (en) * | 2015-05-26 | 2015-09-09 | 成都高普石油工程技术有限公司 | Method for forging oil drill pipe joint |
| CN107186149B (en) * | 2017-07-19 | 2023-09-12 | 无锡双马钻探工具有限公司 | One-die two-piece forging die and method for drill pipe joint |
| CN111230416B (en) * | 2020-01-18 | 2021-03-23 | 上海兴道锻造有限公司 | Chain plate forging process |
| CN111673024B (en) * | 2020-04-27 | 2022-05-20 | 上海盈豪锻造有限公司 | Forging and pressing processing technology of hydraulic joint |
| CN112708733A (en) * | 2020-12-16 | 2021-04-27 | 无锡华信石油机械有限公司 | Processing technology of petroleum drill rod joint |
| CN114055101A (en) * | 2021-12-23 | 2022-02-18 | 沧州中星石油器材有限公司 | Novel titanium alloy drill rod joint forging production process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4146060A (en) * | 1977-07-25 | 1979-03-27 | Smith International, Inc. | Drill pipe wear belt assembly |
| JP2006266286A (en) * | 2005-03-22 | 2006-10-05 | Honda Motor Co Ltd | Manufacturing method for outer ring member for constant velocity joint and its intermediate molded body |
| CN101100027A (en) * | 2006-07-07 | 2008-01-09 | 唐建军 | Petroleum drilling rod joint extrusion forming technology method |
| CN101181730A (en) * | 2007-12-07 | 2008-05-21 | 江阴隆澄钻采机械制造有限公司 | Drill pipe joint precision die forging process |
| CN102896471A (en) * | 2012-10-22 | 2013-01-30 | 江苏和信石油机械有限公司 | Automatic production method of oil drill rod joints |
| CN103706744A (en) * | 2013-12-31 | 2014-04-09 | 海隆石油钻具（无锡）有限公司 | Petroleum drill rod joint horizontal die forging technology and die forging device |
-
2014
- 2014-04-25 CN CN201410171985.4A patent/CN103962801B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4146060A (en) * | 1977-07-25 | 1979-03-27 | Smith International, Inc. | Drill pipe wear belt assembly |
| JP2006266286A (en) * | 2005-03-22 | 2006-10-05 | Honda Motor Co Ltd | Manufacturing method for outer ring member for constant velocity joint and its intermediate molded body |
| CN101100027A (en) * | 2006-07-07 | 2008-01-09 | 唐建军 | Petroleum drilling rod joint extrusion forming technology method |
| CN101181730A (en) * | 2007-12-07 | 2008-05-21 | 江阴隆澄钻采机械制造有限公司 | Drill pipe joint precision die forging process |
| CN102896471A (en) * | 2012-10-22 | 2013-01-30 | 江苏和信石油机械有限公司 | Automatic production method of oil drill rod joints |
| CN103706744A (en) * | 2013-12-31 | 2014-04-09 | 海隆石油钻具（无锡）有限公司 | Petroleum drill rod joint horizontal die forging technology and die forging device |
Non-Patent Citations (1)
| Title |
|---|
| 石油钻杆接头成形工艺研究;邓飞;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》;20070815(第2期);第B022-170页 * |
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| Publication number | Publication date |
|---|---|
| CN103962801A (en) | 2014-08-06 |
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