CN103752630A - Preparation method of variable cross-section aluminum alloy drill rod pipe body - Google Patents
Preparation method of variable cross-section aluminum alloy drill rod pipe body Download PDFInfo
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- CN103752630A CN103752630A CN201310731939.0A CN201310731939A CN103752630A CN 103752630 A CN103752630 A CN 103752630A CN 201310731939 A CN201310731939 A CN 201310731939A CN 103752630 A CN103752630 A CN 103752630A
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Abstract
The invention discloses a preparation method of a variable cross-section aluminum alloy drill rod pipe body. The wall thicknesses of two ends of the prepared aluminum alloy drill rod pipe body are greater than the middle wall thickness. The preparation method of the variable cross-section aluminum alloy drill rod pipe body comprises the following steps: putting preheated aluminum alloy hollow cast ingots into an extruding cylinder by adopting a double-acting extruder, pushing an extruding pad on an extruding shaft by the extruding shaft to extrude the aluminum alloy hollow cast ingots, controlling the displacement of an extruding needle in an extruding mold, and regulating the clearance fit between a working tape of the extruding needle and a sizing tape of the extruding mold to extrude the drill rod pipe body according to the thicknesses of a thickening part, a transition part and a thinned wall section of a drill rod so as to produce the variable cross-section aluminum alloy drill rod pipe body with wall thicknesses conforming to the requirement. According to the method disclosed by the invention, the defects for extruding pipes by a sectional mold are overcome, secondary processing of the pipe body at the thickened end is not needed, the production efficiency is greatly improved, and the production cost is reduced.
Description
Technical field
The present invention relates to a kind of preparation method of variable cross-section aluminium alloy drill pipe body.
Background technology
Traditional steel drilling rod, under the operating modes such as horizontal well, high corrosive medium well, ultradeep well, often runs into the problems such as drilling rod friction hot tearing, hydrogen embrittlement, stress corrosion fracture, bit speed and Efficiency Decreasing, hook load be excessive.These problems are determined by the characteristic of material itself, if fundamentally improve the performance of drilling rod, just must improve the material of drill pipe body, and aluminium drill pipe arises at the historic moment at this point.
Aluminium alloy is compared with traditional steel, and density and elastic modelling quantity are 1/3 of steel, and its intensity is 1.5～2 times of steel.Aluminium drill pipe quality is light, under the certain condition of drill capacity, can reach the degree of depth that drill steel cannot arrive with aluminium drill pipe.In corrosive environment, because stoping, the stable oxide-film of aluminium drill pipe surface coverage one deck reacts with the further of environment, can be used for hydrogen sulfide and the carbon dioxide environment of any concentration.The buoyancy coefficient of aluminium drill pipe is less than steel, can alleviate the blocked portion making a trip, and saves for 20～25% trip time, fuel saving.Under identical hole curvature, the bending stress of aluminium drill pipe is much smaller than drill steel, thereby is applicable to directional well that off-angle drilling, radius of curvature are little and horizontal segment length's horizontal well.
Aluminium alloy drill pipe body is divided into thick section, changeover portion and thin segment, is a kind of variable cross-section tubing, and the preparation of drill steel is by realizing seamless pipe two ends jumping-up conventionally.The intensity of aluminium drill pipe, lower than drill steel, therefore needs the length of upset end long compared with drill steel, if adopt the method for jumping-up cannot realize long upset end, texturing quality is difficult to control.
The method of making at present variable cross-section tubing has substep extrusion and first makes equal pipe and then two ends are thickeied to the method for processing.The shortcomings such as these methods need segmentation, and artificial die change, exists error larger, and production efficiency is low.Therefore, the variable cross-section pressing method of development of new is made aluminium drill pipe upset end, is very necessary work.
Chinese patent CN102019303A has proposed a kind of preparation facilities and method of aluminium alloy drill pipe body, but its squeezing needle complex structural designs, processing difficulties, cost of manufacture and maintenance cost are high.
Summary of the invention
The object of the invention is to for above-mentioned existing problems and deficiency, a kind of defect that can overcome bridge die extrusion tubing is provided, and without thick section body is carried out to secondary operations, greatly improved the preparation method of the variable cross-section aluminium alloy drill pipe body of production efficiency.
Technical scheme of the present invention is achieved in that
The preparation method of variable cross-section aluminium alloy drill pipe body of the present invention, is characterized in comprising the steps:
A, aluminium alloy hollow cast ingot is carried out to pretreatment;
B, pretreated aluminium alloy hollow cast ingot is put into recipient, and after extrusion axis being moved into recipient by one end of recipient by the extrusion axis control system of double-acting extruding machine, squeezing needle control system by double-acting extruding machine is squeezed into squeezing needle in aluminium alloy hollow cast ingot through the central through hole of extrusion axis, by squeezing needle control system control squeezing needle, continued axially to move forward along the direction of extrusion simultaneously, until position during the poor thick section wall thickness that equals aluminium alloy drill pipe body of the work band of squeezing needle and the diameter between the calibrating strap of the extrusion die of the recipient other end, start extrusion axis control system, start extruding, at this position aluminium alloy hollow cast ingot, under extruding force effect, by squeezing needle, squeeze out the thick section A of aluminium alloy drill pipe body one end,
C, reach after the length of designing requirement when the length of the thick section of aluminium alloy drill pipe body, extrusion axis control system control aluminium alloy hollow cast ingot, squeezing needle control system continues squeezing needle to move forward, gap smaller between work band and the calibrating strap of extrusion die of squeezing needle, start extrusion axis control system, make squeezing needle and extrusion axis interlock, start extruding, this process extruding forms the changeover portion A of aluminium alloy drill pipe body one end;
D, extrusion axis control system continue extruding aluminium alloy hollow cast ingot, squeezing needle control system continues reach by squeezing needle, make gap between work band and the calibrating strap of extrusion die of squeezing needle equal the wall thickness of the thin segment of aluminium alloy drill pipe body, this position is for squeezing out the thin segment of aluminium alloy drill pipe body;
E, extrusion axis system control extruding aluminium alloy hollow cast ingot, when the length of the thin segment of the aluminium alloy drill pipe body squeezing out reaches after designing requirement, squeezing needle control system moves squeezing needle backward, between the work band of squeezing needle and the calibrating strap of extrusion die, again form the gap equating with changeover portion wall thickness, now squeeze out the changeover portion B of the aluminium alloy drill pipe body other end;
F, extrusion axis system continue to control aluminium alloy hollow cast ingot, squeezing needle control system continues to move backward, when squeezing needle moves to the gap that between its work band and the calibrating strap of extrusion die, formation equates with thick section wall thickness, stop, now squeezing out the thick section B of the aluminium alloy drill pipe body other end;
G, when the length dimension of the thick section of the aluminium alloy drill pipe body other end reaches designing requirement, cutting machine cuts the aluminium alloy drill pipe body of shaping, completes the squeeze job of whole variable cross-section aluminium alloy drill pipe body.
Wherein, in above-mentioned steps A, the pretreated method of aluminium alloy hollow cast ingot is: first aluminium alloy hollow cast ingot is cut into required length, then aluminium alloy hollow cast ingot is preheated to 460 ℃～490 ℃, and through machined peeling.
Before carrying out above-mentioned steps B, can first recipient be preheating to 430 ℃～460 ℃.
Before carrying out above-mentioned steps B, can first extrusion die be preheating to 430 ℃～460 ℃.
The calibrating strap diameter of above-mentioned extrusion die is greater than the work band diameter of squeezing needle, and the calibrating strap of described extrusion die is along the axial setting of extrusion die, and the work band of described squeezing needle is arranged on the front end of squeezing needle.
Technical scheme tool of the present invention has the following advantages:
Adopt method of the present invention to make variable cross-section aluminium alloy drill pipe body, both overcome the defect of bridge die extrusion tubing, again without secondary operations is carried out in body thick section, thereby greatly improved production efficiency, reduced production cost.
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Accompanying drawing explanation
Fig. 1 is the structural representation of variable cross-section aluminium alloy drill pipe body of the present invention.
Fig. 2 is the structural representation of the preparation facilities of variable cross-section aluminium alloy drill pipe body of the present invention.
Fig. 3 is the extruding schematic diagram of extruding aluminium alloy drill pipe body of the present invention thick section.
Fig. 4 is the extruding schematic diagram of extruding aluminium alloy drill pipe body changeover portion of the present invention.
Fig. 5 is the extruding schematic diagram of extruding aluminium alloy drill pipe body thin segment of the present invention.
Fig. 6 is the extruding schematic diagram of another changeover portion of extruding aluminium alloy drill pipe body of the present invention.
Fig. 7 is the extruding schematic diagram of another thick section of extruding aluminium alloy drill pipe body of the present invention.
The specific embodiment
As shown in Figure 1, variable cross-section aluminium alloy drill pipe body 1 of the present invention is comprised of thin segment 11, the one-body molded changeover portion A12 in thin segment 11 one end, the one-body molded thick section A13 in changeover portion A12 outer end, the one-body molded changeover portion B14 at thin segment 11 other ends and one-body molded thick section B15 in changeover portion B14 outer end.
As shown in Figure 2, for variable cross-section aluminium alloy drill pipe body extrusion equipment structure chart, described extruder is double-acting extruding machine, described extruding tool and mould comprises recipient 4, extrusion axis 5, squeezing needle 2 and extrusion die 3, described extrusion axis 5 can be plugged in recipient 4, and the front end of described extrusion axis 5 is provided with dummy block, described squeezing needle 2 can be plugged in the central through hole of described extrusion axis 5, described extrusion die 3 is positioned at recipient 4 terminations, described extruder is to independent control of described squeezing needle 2, described squeezing needle 2 under the control of described extruder in the interior movement of extrusion die 3, described squeezing needle 2 front ends are provided with work band 21, described work is comprised of round platform part and the column part that is positioned at round platform part front end with 21, described extrusion die 3 is provided with calibrating strap 31 vertically, 21 diameters are with in the work that described calibrating strap 31 diameters are greater than described squeezing needle 2, thick section, changeover portion and the thin-walled end of variable cross-section aluminium alloy drill pipe body 1 respectively by the work of squeezing needle 2 with 21 and the calibrating strap 31 of extrusion die 3 between poor control of diameter.
Adopt above-mentioned preparation facilities to make the method for variable cross-section aluminium alloy drill pipe body of the present invention, comprise the steps:
First, aluminium alloy hollow cast ingot 6 is cut into required length, then aluminium alloy hollow cast ingot 6 is preheated to 460 ℃～490 ℃, and through machined peeling, recipient 4 is preheating to 430 ℃～460 ℃ simultaneously, extrusion die 3 is preheating to 430 ℃～460 ℃;
Then, as shown in Figure 2, pretreated aluminium alloy hollow cast ingot 6 is put into recipient 4, and after extrusion axis 5 being moved into recipient 4 by one end of recipient 4 by the extrusion axis control system of double-acting extruding machine, squeezing needle control system by double-acting extruding machine is squeezed into squeezing needle 2 in aluminium alloy hollow cast ingot 6 through the central through hole of extrusion axis 5, by squeezing needle control system control squeezing needle 2, continued axially to move forward along the direction of extrusion simultaneously, until the work of squeezing needle 2 is with 21 and position during the poor thick section wall thickness that equals aluminium alloy drill pipe body of diameter between the calibrating strap 31 of the extrusion die 3 of recipient 4 other ends, start extrusion axis control system, start extruding, as shown in Figure 3, at this position aluminium alloy hollow cast ingot 6, under extruding force effect, by squeezing needle 2, squeeze out the thick section A13 of aluminium alloy drill pipe body one end,
Then, when the length of the thick section 13 of aluminium alloy drill pipe body reaches after the length of designing requirement, extrusion axis control system control aluminium alloy hollow cast ingot 6, squeezing needle control system continues squeezing needle 2 to move forward, the work of squeezing needle 2 with 21 and the calibrating strap 31 of extrusion die 3 between gap smaller, start extrusion axis control system, squeezing needle 2 and extrusion axis 5 are linked, start extruding, as shown in Figure 4, this process extruding forms the changeover portion A12 of aluminium alloy drill pipe body one end;
Then, extrusion axis control system continues extruding aluminium alloy hollow cast ingot 6, squeezing needle control system continues reach by squeezing needle 2, the work that makes squeezing needle 2 with 21 and the calibrating strap 31 of extrusion die 3 between gap equal the wall thickness of the thin segment of aluminium alloy drill pipe body, as shown in Figure 5, this position is for squeezing out the thin segment 11 of aluminium alloy drill pipe body;
Then, extrusion axis system control extruding aluminium alloy hollow cast ingot 6, when the length of the thin segment 11 of the aluminium alloy drill pipe body squeezing out reaches after designing requirement, squeezing needle control system moves squeezing needle 2 backward, the work of squeezing needle 2 with 21 and the calibrating strap 31 of extrusion die 3 between again form the gap equating with changeover portion wall thickness, as shown in Figure 6, now squeeze out the changeover portion B14 of the aluminium alloy drill pipe body other end;
Then, extrusion axis system continues to control aluminium alloy hollow cast ingot 6, squeezing needle control system continues to move backward, when moving to the gap that between its work band 21 and the calibrating strap 31 of extrusion die 3, formation equates with thick section wall thickness, squeezing needle 2 stops, as shown in Figure 7, now squeeze out the thick section B15 of the aluminium alloy drill pipe body other end;
Finally, when the length dimension of the thick section of aluminium alloy drill pipe body other end B15 reaches designing requirement, cutting machine cuts the aluminium alloy drill pipe body of shaping, completes the squeeze job of whole variable cross-section aluminium alloy drill pipe body 1.
After above-mentioned extrusion process completes, through Overheating Treatment, aligning, cuts sizing, has just prepared satisfactory variable cross-section aluminium alloy drill pipe body 1.
The present invention describes by embodiment, but the present invention is not construed as limiting, with reference to description of the invention, other variations of the disclosed embodiments, as the professional person for this area easily expects, within such variation should belong to the scope of the claims in the present invention restriction.
Claims (5)
1. a preparation method for variable cross-section aluminium alloy drill pipe body, is characterized in that comprising the steps:
A, aluminium alloy hollow cast ingot (6) is carried out to pretreatment;
B, pretreated aluminium alloy hollow cast ingot (6) is put into recipient (4), and by the extrusion axis control system of double-acting extruding machine, extrusion axis (5) is moved into recipient (4) afterwards by one end of recipient (4), squeezing needle control system by double-acting extruding machine is squeezed into squeezing needle (2) in aluminium alloy hollow cast ingot (6) through the central through hole of extrusion axis (5), by squeezing needle control system control squeezing needle (2), continued axially to move forward along the direction of extrusion simultaneously, until the work band (21) of squeezing needle (2) and the position while being positioned at the poor thick section wall thickness that equals aluminium alloy drill pipe body of diameter between the calibrating strap (31) of extrusion die (3) of recipient (4) other end, start extrusion axis control system, start extruding, at this position aluminium alloy hollow cast ingot (6), under extruding force effect, by squeezing needle (2), squeeze out the thick section A(13 of aluminium alloy drill pipe body one end),
C, reach after the length of designing requirement when the length of the thick section (13) of aluminium alloy drill pipe body, extrusion axis control system control aluminium alloy hollow cast ingot (6), squeezing needle control system continues squeezing needle (2) to move forward, gap smaller between the work band (21) of squeezing needle (2) and the calibrating strap (31) of extrusion die (3), start extrusion axis control system, make squeezing needle (2) and extrusion axis (5) interlock, start extruding, this process extruding forms the changeover portion A(12 of aluminium alloy drill pipe body one end);
D, extrusion axis control system continue extruding aluminium alloy hollow cast ingot (6), squeezing needle control system continues reach by squeezing needle (2), make gap between the work band (21) of squeezing needle (2) and the calibrating strap (31) of extrusion die (3) equal the wall thickness of the thin segment of aluminium alloy drill pipe body, this position is for squeezing out the thin segment (11) of aluminium alloy drill pipe body;
E, extrusion axis system control extruding aluminium alloy hollow cast ingot (6), when the length of the thin segment (11) of the aluminium alloy drill pipe body squeezing out reaches after designing requirement, squeezing needle control system moves squeezing needle (2) backward, between the work band (21) of squeezing needle (2) and the calibrating strap (31) of extrusion die (3), again form the gap equating with changeover portion wall thickness, now squeeze out the changeover portion B(14 of the aluminium alloy drill pipe body other end);
F, extrusion axis system continue to control aluminium alloy hollow cast ingot (6), squeezing needle control system continues to move backward, when squeezing needle (2) moves to the gap that between its work band (21) and the calibrating strap (31) of extrusion die (3), formation equates with thick section wall thickness, stop, now squeezing out the thick section B(15 of the aluminium alloy drill pipe body other end);
G, as the thick section of aluminium alloy drill pipe body other end B(15) length dimension while reaching designing requirement, cutting machine cuts the aluminium alloy drill pipe body of shaping, completes the squeeze job of whole variable cross-section aluminium alloy drill pipe body (1).
2. the preparation method of variable cross-section aluminium alloy drill pipe body according to claim 1, it is characterized in that in above-mentioned steps A, the pretreated method of aluminium alloy hollow cast ingot (6) is: first aluminium alloy hollow cast ingot (6) is cut into required length, then aluminium alloy hollow cast ingot (6) is preheated to 460 ℃～490 ℃, and through machined peeling.
3. the preparation method of variable cross-section aluminium alloy drill pipe body according to claim 1, is characterized in that before carrying out above-mentioned steps B, can first recipient (4) be preheating to 430 ℃～460 ℃.
4. the preparation method of variable cross-section aluminium alloy drill pipe body according to claim 1, is characterized in that before carrying out above-mentioned steps B, can first extrusion die (3) be preheating to 430 ℃～460 ℃.
5. the preparation method of variable cross-section aluminium alloy drill pipe body according to claim 1, it is characterized in that calibrating strap (31) diameter of above-mentioned extrusion die (3) is greater than work band (21) diameter of squeezing needle (2), the calibrating strap (31) of described extrusion die (3) is along the axial setting of extrusion die (3), and the work band (21) of described squeezing needle (2) is arranged on the front end of squeezing needle (2).
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| CN201310731939.0A CN103752630A (en) | 2013-12-27 | 2013-12-27 | Preparation method of variable cross-section aluminum alloy drill rod pipe body |
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| CN201310731939.0A CN103752630A (en) | 2013-12-27 | 2013-12-27 | Preparation method of variable cross-section aluminum alloy drill rod pipe body |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104275358A (en) * | 2014-09-22 | 2015-01-14 | 吉林利源精制股份有限公司 | Extrusion molding method for aluminum alloy inner diameter-changeable seamless tube |
| CN105537308A (en) * | 2016-01-26 | 2016-05-04 | 中国重型机械研究院股份公司 | External variable-diameter aluminum alloy seamless pipe extrusion production method |
| CN105642690A (en) * | 2014-11-28 | 2016-06-08 | 财团法人金属工业研究发展中心 | Method for manufacturing steel section, extrusion device and steel extrusion ingot |
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| US4845972A (en) * | 1986-12-15 | 1989-07-11 | Nippon Steel Corp. | Method for working the ends of steel pipe by upsetting and pressing |
| US5184495A (en) * | 1991-12-03 | 1993-02-09 | Prideco, Inc. | Method of internally and externally upsetting the end of a metal tube |
| CN101543946B (en) * | 2008-03-28 | 2012-05-09 | 上海海隆石油管材研究所 | Method for preparing aluminium alloy drill pipe body with over-long upset ends |
| CN102019303B (en) * | 2009-09-14 | 2012-07-04 | 上海海隆石油管材研究所 | Device and method for preparing aluminum alloy drill rod tube body |
| CN202555618U (en) * | 2012-02-28 | 2012-11-28 | 上海海隆石油管材研究所 | Extrusion die for making variable cross-section aluminium alloy pipe in internal upset form |
| CN202715641U (en) * | 2012-08-28 | 2013-02-06 | 淄博斯壮铝业有限公司 | Machining device for internal upset aluminum alloy drill pipe body |
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2013
- 2013-12-27 CN CN201310731939.0A patent/CN103752630A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4845972A (en) * | 1986-12-15 | 1989-07-11 | Nippon Steel Corp. | Method for working the ends of steel pipe by upsetting and pressing |
| US5184495A (en) * | 1991-12-03 | 1993-02-09 | Prideco, Inc. | Method of internally and externally upsetting the end of a metal tube |
| CN101543946B (en) * | 2008-03-28 | 2012-05-09 | 上海海隆石油管材研究所 | Method for preparing aluminium alloy drill pipe body with over-long upset ends |
| CN102019303B (en) * | 2009-09-14 | 2012-07-04 | 上海海隆石油管材研究所 | Device and method for preparing aluminum alloy drill rod tube body |
| CN202555618U (en) * | 2012-02-28 | 2012-11-28 | 上海海隆石油管材研究所 | Extrusion die for making variable cross-section aluminium alloy pipe in internal upset form |
| CN202715641U (en) * | 2012-08-28 | 2013-02-06 | 淄博斯壮铝业有限公司 | Machining device for internal upset aluminum alloy drill pipe body |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104275358A (en) * | 2014-09-22 | 2015-01-14 | 吉林利源精制股份有限公司 | Extrusion molding method for aluminum alloy inner diameter-changeable seamless tube |
| CN105642690A (en) * | 2014-11-28 | 2016-06-08 | 财团法人金属工业研究发展中心 | Method for manufacturing steel section, extrusion device and steel extrusion ingot |
| CN105537308A (en) * | 2016-01-26 | 2016-05-04 | 中国重型机械研究院股份公司 | External variable-diameter aluminum alloy seamless pipe extrusion production method |
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