CN203097740U - Curved-surface internal-upset intermediate-belt drill pipe - Google Patents
Curved-surface internal-upset intermediate-belt drill pipe Download PDFInfo
- Publication number
- CN203097740U CN203097740U CN 201220702352 CN201220702352U CN203097740U CN 203097740 U CN203097740 U CN 203097740U CN 201220702352 CN201220702352 CN 201220702352 CN 201220702352 U CN201220702352 U CN 201220702352U CN 203097740 U CN203097740 U CN 203097740U
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- drill pipe
- upset
- belt
- intermediate belt
- internal
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Abstract
The utility model provides a curved-surface internal-upset intermediate-belt drill pipe, and belongs to the technical fields of drill pipes for oil and gas field exploration and development wells and underground engineering. The curved-surface internal-upset intermediate-belt drill pipe comprises a drill pipe joint, a welding line, a drill pipe upset intermediate belt, and a drill pipe body. The drill pipe joint is connected with the drill pipe upset intermediate belt through the welding line, and the drill pipe upset intermediate belt is connected with the drill pipe body. The drill pipe upset intermediate belt comprises an internal-upset cylindrical surface and an inner curved surface. The arc intermediation radius of arc intermediation of the internal-upset cylindrical surface and the inner curved surface is larger than 300mm, and the arc intermediation radius of arc intermediation of the inner curved surface and the drill pipe body is also larger than 300mm. The curved-surface internal-upset intermediate-belt drill pipe has the advantages that wall thickness of the internal-upset disappearance position of the drill pipe intermediate belt is increased, the length of the internal-upset intermediate belt is increased, and stress concentration of the internal-upset intermediate belt disappearance position is reduced; and intermediation of the upset intermediate belt and the drill pipe body is performed gently, deformation amount of the upset intermediate belt is reduced, processing quality of the drill pipe upset intermediate belt is guaranteed, and service life of the drill pipe is prolonged.
Description
Technical field
The utility model relates to crassitude intermediate belt drilling rod in a kind of curved surface.Belong to the oilfield prospecting developing well with drilling rod and underground construction technical field.
Background technology
Large quantities of directional wells, high angle hole, horizontal well and underbalance well appear in oil field at present, and the degree of depth constantly increases, and the drilling engineering difficulty is increasing, and technology also requires more and more higher.When ordering goods at present drill pipe thickening intermediate zone place has been required to increase the radius of curvature (greater than 300 millimeters) of inner conical surface length (greater than 100 millimeters) and the conical surface and body, still pierced through even rupture when still using at the scene in crassitude intermediate belt disappearance place generation fatigue.Through analysing in depth and calculating, think that crassitude intermediate belt structure self-defect can not satisfy the demand under drilling parameter reinforcement, the drilling condition complexity, needs to improve crassitude intermediate belt place structure.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides crassitude intermediate belt drilling rod in a kind of curved surface.
Crassitude intermediate belt drilling rod in a kind of curved surface improves under the situation of API standard drilling rod order condition not needing, and can significantly reduce inner conical surface disappearance place stress level and stress and concentrate, thereby help preventing that drilling rod from piercing through and fracture failure.
Crassitude intermediate belt drilling rod in a kind of curved surface comprises tool joint, weld seam, drill pipe thickening intermediate zone and drill pipe body; Tool joint is connected with the drill pipe thickening intermediate zone by weld seam, and the drill pipe thickening intermediate zone is connected with drill pipe body; The thickening face of cylinder and negative camber in the drill pipe thickening intermediate zone comprises.
The arc transition radius of the interior thickening face of cylinder and negative camber arc transition is greater than 300 millimeters, and the arc transition radius of negative camber and drill pipe body arc transition is greater than 300 millimeters.
Beneficial effect:
(1) this structure has not only increased thickening disappearance place wall thickness in the drilling rod intermediate zone place, and the length that has prolonged interior crassitude intermediate belt, and the stress that has reduced crassitude intermediate belt disappearance position is concentrated.
(2) improve crassitude intermediate belt place, back and the mild transition of drill pipe body, reduce crassitude intermediate belt place deflection, guarantee the crudy of drill pipe thickening intermediate zone, improve the service life of drilling rod.
Description of drawings
When considered in conjunction with the accompanying drawings, by the reference following detailed, can more completely understand the utility model better and learn wherein many attendant advantages easily, but accompanying drawing described herein is used to provide further understanding of the present utility model, constitute a part of the present utility model, illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model, as figure wherein:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the utility model drill pipe thickening intermediate zone schematic diagram.
Below in conjunction with drawings and Examples the utility model is further specified.
The specific embodiment
Obviously, the many modifications and variations done based on aim of the present utility model of those skilled in the art belong to protection domain of the present utility model.
Embodiment 1: as shown in Figure 1, tool joint 1 is connected with drill pipe thickening intermediate zone 3 by weld seam 2, and drill pipe thickening intermediate zone 3 is connected with drill pipe body 4.
As shown in Figure 2, the thickening face of cylinder 5 and negative camber 6 in drill pipe thickening intermediate zone 3 comprises.
In the thickening face of cylinder 5 be cylindrical shape, with negative camber 6 arc transition radiuses greater than 300 millimeters.
When forming negative camber 6, with crassitude intermediate belt former in the thickening face of cylinder and former inner conical surface intersection point 7 and former inner conical surface and inboard wall of tube body intersection point 8 be axis, be symmetrically formed with dotted portion among the figure (former crassitude intermediate belt structure) and thicken the position.
The circular arc chamfering radius of the inner cylinder face 5 and the conical surface is greater than 300 millimeters, and the conical surface and inboard wall of tube body arc transition radius form negative camber 6 greater than 300 millimeters through twice arc transition.
This mild transition in structure crassitude intermediate belt place can reduce crassitude intermediate belt place stress and concentrate.
In Fig. 2, wherein dotted portion is former crassitude intermediate belt structure, and point 7 is the former interior thickening face of cylinder and former inner conical surface intersection point, and point 8 is former inner conical surface and inboard wall of tube body intersection point.
As mentioned above, embodiment of the present utility model is explained, but as long as not breaking away from inventive point of the present utility model and effect in fact can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation also all is included within the protection domain of the present utility model.
Claims (2)
1. the interior crassitude intermediate belt drilling rod of curved surface is characterized in that: comprise tool joint, weld seam, drill pipe thickening intermediate zone and drill pipe body; Tool joint is connected with the drill pipe thickening intermediate zone by weld seam, and the drill pipe thickening intermediate zone is connected with drill pipe body; The thickening face of cylinder and negative camber in the drill pipe thickening intermediate zone comprises.
2. crassitude intermediate belt drilling rod in a kind of curved surface according to claim 1, it is characterized in that: the arc transition radius of the interior thickening face of cylinder and negative camber arc transition is greater than 300 millimeters, and the arc transition radius of negative camber and drill pipe body arc transition is greater than 300 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220702352 CN203097740U (en) | 2012-12-18 | 2012-12-18 | Curved-surface internal-upset intermediate-belt drill pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220702352 CN203097740U (en) | 2012-12-18 | 2012-12-18 | Curved-surface internal-upset intermediate-belt drill pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203097740U true CN203097740U (en) | 2013-07-31 |
Family
ID=48849149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220702352 Expired - Fee Related CN203097740U (en) | 2012-12-18 | 2012-12-18 | Curved-surface internal-upset intermediate-belt drill pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203097740U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106567679A (en) * | 2015-10-13 | 2017-04-19 | 中国石油天然气股份有限公司 | Oil drill rod |
-
2012
- 2012-12-18 CN CN 201220702352 patent/CN203097740U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106567679A (en) * | 2015-10-13 | 2017-04-19 | 中国石油天然气股份有限公司 | Oil drill rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20211218 |