CN203097742U - S-shaped internal thickening transition belt drill rod - Google Patents
S-shaped internal thickening transition belt drill rod Download PDFInfo
- Publication number
- CN203097742U CN203097742U CN 201220702357 CN201220702357U CN203097742U CN 203097742 U CN203097742 U CN 203097742U CN 201220702357 CN201220702357 CN 201220702357 CN 201220702357 U CN201220702357 U CN 201220702357U CN 203097742 U CN203097742 U CN 203097742U
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- Prior art keywords
- drill rod
- drilling fluid
- thickening
- thickening transition
- reduced
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- Expired - Fee Related
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- 230000008719 thickening Effects 0.000 title claims abstract description 21
- 230000007704 transition Effects 0.000 title abstract description 9
- 238000005553 drilling Methods 0.000 claims abstract description 34
- 239000012530 fluid Substances 0.000 abstract description 15
- 230000008034 disappearance Effects 0.000 abstract description 9
- 230000003139 buffering effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The utility model relates to a thickening transition area drilling rod in S type belongs to drilling rod and underground works technical field for oil gas field exploration and development well. The lower part of the drill rod joint is a drill rod pipe body, the top of the drill rod joint is connected with a drill rod thickening transition belt through a welding seam, and the upper part of the drill rod joint is provided with an S-shaped inner conical surface and an inner thickening cylindrical surface. The utility model discloses beneficial effect: (1) and the stress concentration at the disappearance position of the inner thickening transition zone is reduced. (2) Under high rotating speed, the resistance of the drilling fluid flowing from the drill rod joint to the pipe wall is increased, the buffering is provided for the drilling fluid, and the acting force of the drilling fluid on the disappearance position of the thickening transition zone is reduced. (3) The viscosity coefficient of the drilling fluid at the thickening transition zone is reduced, the residual drilling fluid on the pipe wall is reduced, and the drill pipe is prevented from leaking at the disappearance position of the thickening transition zone.
Description
Technical field
The utility model relates to crassitude intermediate belt drilling rod in a kind of S type.Belong to the oilfield prospecting developing well with drilling rod and underground construction technical field.
Background technology
Existing drill pipe thickening intermediate zone structure generally is to carry out the transition to internal diameter of tube body by the interior thickening face of cylinder by inner conical surface to constitute, because inner conical surface has tapering and liquid flows from top to bottom, drilling parameter is continually strengthened at present in addition, the drawback of its structure highlights day by day, causing inner conical surface and drill pipe body connecting portion is that drilling fluid is to the strongest point of tube wall souring power, this place also is the most concentrated position of stress, the tired source of the terminal easily generation of crassitude intermediate belt promptly, under mud-corrosion medium and alternating stresses effect, pierce through inefficacy through expanding final formation drill pipe thickening intermediate zone.The drilling rod of imitating in the thorn leakage of this position accounts for 52.1% of all inefficacy drilling rods in recent years by statistics.
Summary of the invention
In order to overcome existing technical deficiency, the utility model provides crassitude intermediate belt drilling rod in a kind of S type, concentrate by crassitude intermediate belt disappearance place stress in the crassitude intermediate belt structure reduces in the improvement drilling rod, strengthening under the drilling parameter condition simultaneously, increase drilling fluid is flow to tube wall by tool joint resistance, reduce the active force of drilling fluid, improve the service life of drilling rod crassitude intermediate belt disappearance place.
Crassitude intermediate belt drilling rod in a kind of S type, the bottom of tool joint 1 is a drill pipe body 4, and the top of tool joint 1 is connected with drill pipe thickening intermediate zone 3 by weld seam 2, and the S type inner conical surface 6 and the interior thickening face of cylinder 5 are arranged at the top of tool joint 1.
The interior thickening face of cylinder 5 is a cylindrical shape, and S type inner conical surface 6 is a curve form.
The utility model beneficial effect:
(1) reducing interior crassitude intermediate belt disappearance place stress concentrates.
(2) under high rotating speed, increase drilling fluid and flow to the resistance of tube wall by tool joint, for drilling fluid provides buffering, reduce the active force of drilling fluid to crassitude intermediate belt disappearance place.
(3) reduce drilling fluid at the crassitude intermediate belt place coefficient of viscosity, reduce the residual drilling fluid of tube wall, prevent that disappearance place of drill pipe thickening intermediate zone from thorn taking place leak.
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 a tool joint structural representation of the present utility model.
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 and Figure 2, crassitude intermediate belt drilling rod in a kind of S type, the bottom of tool joint 1 is a drill pipe body 4, and the top of tool joint 1 is connected with drill pipe thickening intermediate zone 3 by weld seam 2, and the S type inner conical surface 6 and the interior thickening face of cylinder 5 are arranged at the top of tool joint 1.
The interior thickening face of cylinder 5 is a cylindrical shape, and S type inner conical surface 6 is a curve form.
S type inner conical surface 6 is protruding near weld seam 2 position nicks near drill pipe body 4 positions.
Crassitude intermediate belt drilling rod in a kind of S type adds man-hour, enters near the joint area nick, and near body position dimpling, the slick and sly smooth transition of connecting place forms " S " type.When liquid when female adapter flows to, the dimpling position forms certain resistance to drilling fluid, can well protect crassitude intermediate belt disappearance place.When liquid from top to bottom, when flowing to male end, the nick position play the buffering drilling fluid effect, can well protect the screw thread position, can reduce drilling tool failure.
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 (3)
1. the interior crassitude intermediate belt drilling rod of S type is characterized in that the bottom of tool joint is a drill pipe body, and the top of tool joint is connected with the drill pipe thickening intermediate zone by weld seam, and the S type inner conical surface and the interior thickening face of cylinder are arranged at the top of tool joint.
2. crassitude intermediate belt drilling rod in a kind of S type according to claim 1, the thickening face of cylinder is a cylindrical shape in it is characterized in that, S type inner conical surface is a curve form.
3. crassitude intermediate belt drilling rod in a kind of S type according to claim 1 is characterized in that: S type inner conical surface is protruding near weld seam position nick near the drill pipe body position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220702357 CN203097742U (en) | 2012-12-18 | 2012-12-18 | S-shaped internal thickening transition belt drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220702357 CN203097742U (en) | 2012-12-18 | 2012-12-18 | S-shaped internal thickening transition belt drill rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203097742U true CN203097742U (en) | 2013-07-31 |
Family
ID=48849151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220702357 Expired - Fee Related CN203097742U (en) | 2012-12-18 | 2012-12-18 | S-shaped internal thickening transition belt drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203097742U (en) |
-
2012
- 2012-12-18 CN CN 201220702357 patent/CN203097742U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20130731 Termination date: 20211218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |