CN2898260Y - Drill rod with externally thickened circular arc transition structure - Google Patents
Drill rod with externally thickened circular arc transition structure Download PDFInfo
- Publication number
- CN2898260Y CN2898260Y CN 200620113015 CN200620113015U CN2898260Y CN 2898260 Y CN2898260 Y CN 2898260Y CN 200620113015 CN200620113015 CN 200620113015 CN 200620113015 U CN200620113015 U CN 200620113015U CN 2898260 Y CN2898260 Y CN 2898260Y
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- Prior art keywords
- drill rod
- thickening
- intermediate zone
- external upset
- external
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- Expired - Lifetime
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- 230000007704 transition Effects 0.000 title claims abstract description 19
- 238000005553 drilling Methods 0.000 claims abstract description 27
- 230000008719 thickening Effects 0.000 claims abstract description 24
- 230000008034 disappearance Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract 2
- 238000005452 bending Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000008859 change Effects 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
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
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Abstract
The drill rod for the exploration and development of the oil and gas well and the drill rod with the external thickening circular arc transition structure for the underground engineering comprises a drill rod joint (1), a welding seam (2) of the drill rod joint and a drill rod body, a drill rod thickening transition zone (3), a drill rod body (4), a drill rod joint (1) and a drill rod thickening transition zone (3) which are connected through the welding seam (2) of the drill rod joint and the drill rod body, wherein the drill rod thickening transition zone (3) is connected with the drill rod body (4), the external thickening circular arc transition can reduce the stress at the disappearance position of the external thickening transition zone, the maximum stress appears at the disappearance position of the external thickening transition zone of the drill rod in the drilling process of the directional well, and the structure is designed for preventing the drilling rod of the directional; the outer thickening transition belt is forged by a profile modeling during manufacturing, and the improvement only needs to re-process a set of outer thickening profile modeling without changing the prior process.
Description
Technical field
The utility model relates to oil gas Jing Kantankaifajing uses drilling rod with drilling rod and underground construction a kind of external upset (EU) arc transition structure drilling rod.
Background technology
For many years, the oil drill rocker premature failure is perplexing drilling well circle always, and in drilling rod inefficacy case, the barbed leakage fracture of drill pipe thickening transition accounts for very big ratio.Its main cause is, when drilling rod rotates in well, not only bear tension and compression and torsional load, and the bending load of bearing alternation, because the outside dimension of drilling rod body and joint is different, its crassitude intermediate belt becomes a weak link of drilling tool, and this position forms stress easily and concentrates, especially concentrate at the higher stress of the end point appearance of crassitude intermediate belt, cause thorn to leak or fracture failure.At directional well, especially in, in the Short Radius Horizontal Wells drilling process, the main load of drilling rod in the bending section well is bending load, maximum stress appears at drilling-rod external wall.Present used drilling rod external upset (EU) intermediate zone is that straight line adds arc transition, and the circular arc radius of curvature is limited, and it is quite a few that on-the-spot detection is opened the drilling rod that splits from the external upset (EU) intermediate zone.
Summary of the invention
The purpose of this utility model is to provide a kind of external upset (EU) arc transition structure drilling rod, thereby can significantly reduce the stress of external upset (EU) intermediate zone disappearance place.
The utility model is achieved in that weld seam 2, drill pipe thickening intermediate zone 3, drill pipe body 4, the external upset (EU) face of cylinder 5, the external upset (EU) intermediate zone 6 that comprises tool joint 1, tool joint and body, tool joint 1 is connected with drill pipe thickening intermediate zone 3 by the weld seam 2 of tool joint and body, and drill pipe thickening intermediate zone 3 is connected with drill pipe body 4.
Drill pipe thickening intermediate zone 3 comprises the external upset (EU) face of cylinder 5, external upset (EU) intermediate zone 6, and the external upset (EU) face of cylinder 5 is connected with external upset (EU) intermediate zone 6 circular arcs, and the external upset (EU) face of cylinder 5 is a cylindrical shape.
The utility model has the advantages that: (1) external upset (EU) arc transition can reduce the stress of external upset (EU) intermediate zone disappearance place, in the directional well drilling process, maximum stress appears at disappearance place of drilling rod external upset (EU) intermediate zone, and this structure is that directional well drilling drilling rod anti-pricked designs; Be that pattern forges when (2) the external upset (EU) intermediate zone is made, this improvement only need be processed a cover external upset (EU) pattern again and be got final product, and does not change current technology; (3) this arc transition can reduce the stress of drilling rod external upset (EU) intermediate zone disappearance place, when the drilling rod manufacturing does not reach designing requirement because of the restriction of equipment, can adopt this structure to remedy.
Description of drawings
Fig. 1 is the utility model drilling rod schematic diagram;
Fig. 2 is the structural representation at the utility model drill pipe thickening intermediate zone 3 positions.
The specific embodiment
As shown in Figure 1, weld seam 2, drill pipe thickening intermediate zone 3, drill pipe body 4 by tool joint 1, tool joint and body are called oneself, tool joint 1 is connected with drill pipe thickening intermediate zone 3 by the weld seam 2 of tool joint and body, and drill pipe thickening intermediate zone 3 is connected with drill pipe body 4.
As shown in Figure 2, drill pipe thickening intermediate zone 3 comprises the external upset (EU) face of cylinder 5, external upset (EU) intermediate zone 6, and the external upset (EU) face of cylinder 5 is connected with external upset (EU) intermediate zone 6 circular arcs, and the external upset (EU) face of cylinder 5 is a cylindrical shape.
The structure of drill pipe thickening intermediate zone 3 comprises the external upset (EU) face of cylinder 5, external upset (EU) intermediate zone 6, and the external upset (EU) intermediate zone lays respectively at the outer wall of drilling rod body end.The external upset (EU) intermediate zone is an arc transition.The geometry of crassitude intermediate belt significantly reduces external upset (EU) intermediate zone disappearance place stress and concentrates, and prevents when helping directional well drilling that thorn from leaking and fracture.
Claims (2)
1, a kind of external upset (EU) arc transition structure drilling rod, the weld seam (2), drill pipe thickening intermediate zone (3), drill pipe body (4), the external upset (EU) face of cylinder (5), the external upset (EU) intermediate zone (6) that comprise tool joint (1), tool joint and body, it is characterized in that: tool joint (1) is connected with drill pipe thickening intermediate zone (3) by the weld seam (2) of tool joint and body, and drill pipe thickening intermediate zone (3) is connected with drill pipe body (4).
2, a kind of external upset (EU) arc transition structure drilling rod according to claim 1, it is characterized in that: drill pipe thickening intermediate zone (3) comprises the external upset (EU) face of cylinder (5), external upset (EU) intermediate zone (6), the external upset (EU) face of cylinder (5) is connected with external upset (EU) intermediate zone (6) circular arc, and the external upset (EU) face of cylinder (5) are cylindrical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620113015 CN2898260Y (en) | 2006-04-21 | 2006-04-21 | Drill rod with externally thickened circular arc transition structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620113015 CN2898260Y (en) | 2006-04-21 | 2006-04-21 | Drill rod with externally thickened circular arc transition structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2898260Y true CN2898260Y (en) | 2007-05-09 |
Family
ID=38073596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620113015 Expired - Lifetime CN2898260Y (en) | 2006-04-21 | 2006-04-21 | Drill rod with externally thickened circular arc transition structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2898260Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103481038A (en) * | 2013-09-24 | 2014-01-01 | 上海海隆石油管材研究所 | Machining method for high-station structure of drill rod |
-
2006
- 2006-04-21 CN CN 200620113015 patent/CN2898260Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103481038A (en) * | 2013-09-24 | 2014-01-01 | 上海海隆石油管材研究所 | Machining method for high-station structure of drill rod |
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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 |
Granted publication date: 20070509 |
|
| EXPY | Termination of patent right or utility model |