CN202544762U - 2<7/8> large-inner-diameter oil pipe - Google Patents
2<7/8> large-inner-diameter oil pipe Download PDFInfo
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- CN202544762U CN202544762U CN2012201804618U CN201220180461U CN202544762U CN 202544762 U CN202544762 U CN 202544762U CN 2012201804618 U CN2012201804618 U CN 2012201804618U CN 201220180461 U CN201220180461 U CN 201220180461U CN 202544762 U CN202544762 U CN 202544762U
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- box cupling
- oil pipe
- thread
- diameter
- pipe
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Abstract
The utility model discloses a 2<7/8> large-inner-diameter oil pipe, which belongs to the technical field of an oil extraction oil pipe and comprises a pipe body and a connecting hoop in threaded connection, wherein the pipe body is provided with an overflow passage, the inner diameter of the overflow passage is 67mm, the pipe body comprises a middle part with uniform wall thickness, the outer diameter of the middle part is 77.5mm, the wall thickness of the middle part is 5.25mm, two ends of the pipe body are thickened parts, and the outer diameter of the thickened parts is 78.59mm. The 2<7/8> large-inner-diameter oil pipe replaces the standard oil pipe with the specification being 73.02*5.51, the same intensity requirement can be reached, the overflow area of the oil pipeline can also be obviously improved, in addition, the weight in each meter is similar to that of the 73.02*5.51 standard oil pipe, the similar total weight of pipe posts after downward combination is ensured, and the 2<7/8> large-inner-diameter oil pipe is widely applied to oilfield oil extraction operation.
Description
Technical field
The utility model relates to oil recovery oil pipe technical field, relates in particular to a kind of 2
7/
8The large diameter oil pipe.
Background technology
The oil field is in the thickened oil recovery process; Normal screw pump or the oil well pump thermal recovery technology of adopting; Domestic tubing string commonly used is configured to: casing string adopts external diameter 177.8mm, wall thickness 8.05mm, endoporus 161.7mm, and it is 108 or 114mm that tubing string adopts external diameter 88.9mm, wall thickness 6.45mm, its box cupling external diameter.This pipe string combination, 1000 mitron post weight reach 48 tons.In order to reduce the oil field cost of investment, part Oilfield using casing string is external diameter 139.7mm, wall thickness 7.72mm, endoporus 124.3mm, and it is 107～108mm that tubing string adopts external diameter 88.9mm, wall thickness 6.45mm, its box cupling external diameter.This pipe string combination, 1000 mitron post weight drop to 38 tons.This is combined in and has some problems in the production run, and is little like annular clearance between the tubing and casing, and about 17.3mm (124.3-107) causes difficulty to carrying out of technology such as later stage well workover, hot-washing wax remover, viscosity reducings.For this reason, adopted 2 of routine
7/
8Oil pipe, its external diameter are that 73.02mm, wall thickness are that 5.51mm, internal diameter are 62mm; But after adopting this oil pipe, because the oil pipe endoporus is 62mm, internal diameter is little, and the supporting rod collar external diameter that uses is 58mm, exists gap little (62-58=4) between rod collar and the oil pipe endoporus, and area of passage is little, the big problem of production moment of torsion.
The utility model content
The utility model technical problem to be solved is: provide a kind of 2
7/
8The large diameter oil pipe replaces specification and is 73.02 * 5.51 standard oil pipe, can either reach identical requirement of strength, can reach enough area of passages again, and every meter weight is approximate with 73.02 * 5.51 standard oil pipe, and afterwards the tubing string gross weight is close to guarantee to go into the well.
For solving the problems of the technologies described above, the technical scheme of the utility model is: 2
7/
8The large diameter oil pipe comprises the body and the box cupling that are threaded together, and said body is provided with flow channels, and the internal diameter of said flow channels is 67mm; Said body comprises the uniform pars intermedia of wall thickness, and the external diameter of said pars intermedia is 77.5mm, and the wall thickness of said pars intermedia is 5.25mm; The two ends of said body are the thickening part, and the external diameter of said thickening part is 78.59mm.
As a kind of improvement, the thickening part of said body is provided with the body external screw thread, and the two ends of said box cupling are equipped with the box cupling internal thread.
As further improvement, the tooth form of said body external screw thread and box cupling internal thread is round thread.
As further improvement, the geometric parameter of said thickening part is:
Body external screw thread tapering is 1: 16;
Every 25.4mm body external screw thread tooth number is 8 teeth;
Body external screw thread thread height is 1.81mm;
Body external screw thread tooth form angle is 60 °;
Outside diameter D4:78.59mm;
Locate middle footpath E1:76.397mm for hand-tight;
Pipe end is to hand-tight face length degree L1:34.06mm;
Effective thread length L 2:48.01mm;
Pipe end to end point total length L 4:53.98mm;
Minimum complete thread length: 28.58mm.
As further improvement, the geometric parameter of said box cupling is:
Box cupling internal thread tapering: 1: 16;
Every 25.4mm box cupling internal thread tooth number is 8 teeth;
Box cupling internal thread thread height is 1.81mm;
Box cupling internal thread tooth form angle is 60 °;
Box cupling external diameter W:93.17mm;
Box cupling minimum length NL:130.18mm;
Box cupling bore diameter Q:80.2mm;
Box cupling boring depth q:9.53mm;
Bearing surface width: 5.56mm.
Mechanical performance is calculated:
1, body yield strength:
PY＝0.7854*(D*D-d*d)*Yp＝0.7854*(77.5*77.5-67*67)*620＝738820(N)；
2, yield pressure in the body:
p＝0.875*(2*Yp*t)/D＝0.875*2*620*5.25/77.5＝73.5(MPa)
3, joint bonding strength (calculating) based on screw thread dangerouse cross-section root area:
p＝0.7854*{(78.59-2*1.810)2-672)}*620＝550980N
4, crowded intensity: the D/t=77.5/5.25=14.76 that ruins, calculate by plasticity collapsing pressure formula:
Pp＝620*{3.071/(77.5/5.25)-0.0667}-1955/145＝74.2MPa
Owing to adopted technique scheme; The beneficial effect of the utility model is: specification is 77.5 * 5.25 non-standard oil pipe with specification is that 73.02 * 5.51 standard oil pipe is compared, and external diameter increases, and wall thickness reduces; Endoporus increases; Actual oil flow channel effective diameter is 67mm, has guaranteed to cross oily efficient, and its performance is relatively like following table:
Above data are with the N80 steel level oil conduit, and SMYS is that 620MPa calculates.The crowded intensity of ruining can be through improving raisings such as oil pipe body ovality, evenness of wall thickness.
Evidence when the ovality that improves the oil pipe body, evenness of wall thickness, can improve its anti-squeezing greatly and ruin performance, so during actual production, it is anti-to squeeze and ruin performance and be far longer than 74.2MPa.
Can find out that from last table though specification is 77.5 * 5.25 non-standard oil pipe tube body wall thickness, its mechanical performance does not reduce, can replace specification fully and be 73.02 * 5.51 standard oil pipe and in the oil field, use.
For guaranteeing oilfield economic, efficient exploitation; Reduce the production management difficulty in oil field; To above problem, optimize the design of tubular column structure, through tubing size and screw thread design; Having developed the oil pipe external diameter is the non-API standard of the large diameter oil pipe of 77.5mm, wall thickness 5.25mm, endoporus 67mm, and the box cupling external diameter is 93mm.With traditional internal diameter be 2 of 62mm
7/
8Little internal diameter oil pipe is compared, adopt this scheme after, annular clearance is increased to 31.3mm by 17.3mm between tubing coupling and the sleeve pipe, the gap is increased to 9mm by 4mm between oil pipe and the rod collar, has thoroughly solved annular space area for cutting between the tubing string.
Because the tooth form of body external screw thread and box cupling internal thread is basic-profile, after screw thread processing, detect and adopt general testing tool to realize, need not increase new measurer, saved cost of production; Simultaneously, through the connecting thread design, adopt API 5B standard 2
7/
8The EUE screw thread can guarantee that the nipple bonding strength satisfies the oil field instructions for use.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the structural representation of body;
Fig. 3 is the structural representation of box cupling;
Among the figure: 1, body, 11, pars intermedia, 12, the thickening part, 121, the body external screw thread, 13, flow channels, 2, box cupling, 21, the box cupling internal thread.
The specific embodiment
As shown in Figure 1, a kind of 2
7/
8The large diameter oil pipe comprises the body 1 and box cupling 2 that are threaded together, and said body 1 is provided with flow channels 13, and the internal diameter of said flow channels 13 is 67mm; Said body 1 comprises the uniform pars intermedia 11 of wall thickness, and the external diameter of said pars intermedia 11 is 77.5mm, and the wall thickness of said pars intermedia 11 is 5.25mm; The two ends of said body 1 are thickening part 12, and the external diameter of said thickening part 12 is 78.59mm.
The thickening part 12 of said body 1 is provided with body external screw thread 121, and the two ends of said box cupling 2 are equipped with box cupling internal thread 21, and said body external screw thread 121 is round thread with the tooth form of box cupling internal thread 21.
As shown in Figure 2, the geometric parameter of said thickening part 12 is:
Body external screw thread tapering is 1: 16;
Every 25.4mm body external screw thread tooth number is 8 teeth;
Body external screw thread thread height is 1.81mm;
Body external screw thread tooth form angle is 60 °;
Outside diameter D4:78.59mm;
Locate middle footpath E1:76.397mm for hand-tight;
Pipe end is to hand-tight face length degree L1:34.06mm;
Effective thread length L 2:48.01mm;
Pipe end to end point total length L 4:53.98mm;
Minimum complete thread length: 28.58mm.
As shown in Figure 3, the geometric parameter of said box cupling 2 is:
Box cupling internal thread tapering: 1: 16;
Every 25.4mm box cupling internal thread tooth number is 8 teeth;
Box cupling internal thread thread height is 1.81mm;
Box cupling internal thread tooth form angle is 60 °;
Box cupling external diameter W:93.17mm;
Box cupling minimum length NL:130.18mm;
Box cupling bore diameter Q:80.2mm;
Box cupling boring depth q:9.53mm;
Bearing surface width: 5.56mm.
During use, with the box cupling internal thread of body external screw thread 121 and box cupling 2 21 be linked together, one one connects G.I.H; Like this, specification is 77.5 * 5.25 non-standard oil pipe with specification is that 73.02 * 5.51 standard oil pipe is compared, and has approximate bonding strength; Tubing string weight is identical; Do not improve from cost of production, installation cost, improve oil recovery efficiency, obtained good result of use.Owing to adopted API 5B2
7/
8EUE heavy wall tubing screw thread can directly be connected with other downhole tool, makes things convenient for the oil field to use.
The utility model is not limited to above-mentioned concrete embodiment, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within the protection domain of the utility model.
Claims (5)
1.2
7/
8The large diameter oil pipe comprises the body and the box cupling that are threaded together, and it is characterized in that: said body is provided with flow channels, and the internal diameter of said flow channels is 67mm; Said body comprises the uniform pars intermedia of wall thickness, and the external diameter of said pars intermedia is 77.5mm, and the wall thickness of said pars intermedia is 5.25mm; The two ends of said body are the thickening part, and the external diameter of said thickening part is 78.59mm.
2. as claimed in claim 12
7/
8The large diameter oil pipe is characterized in that: the thickening part of said body is provided with the body external screw thread, and the two ends of said box cupling are equipped with the box cupling internal thread.
3. as claimed in claim 22
7/
8The large diameter oil pipe is characterized in that: the tooth form of said body external screw thread and box cupling internal thread is round thread.
4. as claimed in claim 32
7/
8The large diameter oil pipe is characterized in that: the geometric parameter of said thickening part is:
Body external screw thread tapering is 1: 16;
Every 25.4mm body external screw thread tooth number is 8 teeth;
Body external screw thread thread height is 1.81mm;
Body external screw thread tooth form angle is 60 °;
Outside diameter D4:78.59mm;
Locate middle footpath E1:76.397mm for hand-tight;
Pipe end is to hand-tight face length degree L1:34.06mm;
Effective thread length L 2:48.01mm;
Pipe end to end point total length L 4:53.98mm;
Minimum complete thread length: 28.58mm.
5. as claimed in claim 32
7/
8The large diameter oil pipe is characterized in that: the geometric parameter of said box cupling is:
Box cupling internal thread tapering: 1: 16;
Every 25.4mm box cupling internal thread tooth number is 8 teeth;
Box cupling internal thread thread height is 1.81mm;
Box cupling internal thread tooth form angle is 60 °;
Box cupling external diameter W:93.17mm;
Box cupling minimum length NL:130.18mm;
Box cupling bore diameter Q:80.2mm;
Box cupling boring depth q:9.53mm;
Bearing surface width: 5.56mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201804618U CN202544762U (en) | 2012-04-20 | 2012-04-20 | 2<7/8> large-inner-diameter oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201804618U CN202544762U (en) | 2012-04-20 | 2012-04-20 | 2<7/8> large-inner-diameter oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202544762U true CN202544762U (en) | 2012-11-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201804618U Expired - Lifetime CN202544762U (en) | 2012-04-20 | 2012-04-20 | 2<7/8> large-inner-diameter oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202544762U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110640396A (en) * | 2018-06-27 | 2020-01-03 | 宝山钢铁股份有限公司 | Method for controlling drift diameter of thick line thickened oil pipe |
-
2012
- 2012-04-20 CN CN2012201804618U patent/CN202544762U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110640396A (en) * | 2018-06-27 | 2020-01-03 | 宝山钢铁股份有限公司 | Method for controlling drift diameter of thick line thickened oil pipe |
| CN110640396B (en) * | 2018-06-27 | 2022-03-18 | 宝山钢铁股份有限公司 | Method for controlling drift diameter of thick line thickened oil pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121121 |