CN201474624U - Drill rod joint with double steps - Google Patents
Drill rod joint with double steps Download PDFInfo
- Publication number
- CN201474624U CN201474624U CN2009201730449U CN200920173044U CN201474624U CN 201474624 U CN201474624 U CN 201474624U CN 2009201730449 U CN2009201730449 U CN 2009201730449U CN 200920173044 U CN200920173044 U CN 200920173044U CN 201474624 U CN201474624 U CN 201474624U
- Authority
- CN
- China
- Prior art keywords
- joint
- drill rod
- slope
- joint body
- right angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000007704 transition Effects 0.000 claims description 20
- 238000003466 welding Methods 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 14
- 239000012141 concentrate Substances 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a drill rod joint with double steps, which is applied to a drill rod and a heavy weight drill rod for producing petroleum drill wells and mainly comprises a joint welding neck and a joint body. The joint body is cylindrical and internally provided with API inner threads; and the joint welding neck is cylindrical and internally provided with a central hole. The drill rod joint is characterized in that the outer surface between the joint welding neck and the joint body is provided with a right-angled step and a slope step; a chamfer is formed between the joint body and the right-angled step; an upper transitional arc is arranged at the connected part of the right-angled step and the slope step; and a lower transitional arc is arranged at the connected part of the slope step and the outer surface of the joint welding neck. The utility model has the advantages that: novel double steps formed by compounding the ring-angled step and the 18-degree slop step are suitable for a hanging tag of the drill rod, ensure that the drill rod joint has good stress distribution, effectively reduces failure accidents and simultaneously improves the safe reliability of the drill rod when a drill stand is packed in a seat.
Description
Technical field
The utility model relates to the petroleum drilling technology field, the joint of needed drilling rod and heavy weight drill pipe in particularly a kind of oil exploration and the cbm exploration engineering.
Background technology
Drilling rod is a kind of important tool in oil and gas exploration and the exploitation, it is the important component part of DRILL-STRING SYSTEM, be positioned at the top of whole drill string, account for 80%～90% of whole drill string length, it is not only the circulation canal of drilling fluid, and in rotary drilling transfer torque, bear tension and compression, bending such as reverses at the compound action of multiple load, in creeping into production, usually lost efficacy, caused down-hole accident.Drilling rod commonly used at present is the drilling rod that friction is welded into, and is linked together by the tool joint at two ends and the mode of drill pipe body employing friction welding.Make a trip or add in the single process at drilling rod, need use a kind of important rig tool-elevator, make drill string set on the rig floor so that drilling rod carry out on, the shackle operation.Set on rig floor for the ease of drill string, the step of drilling rod female end joint the earliest generally adopts the right-angle plane form, and corresponding elevator bearing surface also is a right-angle plane.The step of tool joint adopts the largest benefit of right angle step form of structure to be that the following contact surface (lower plane) of elevator all is that horizontal plane contacts with the last contact surface of rig floor plane, elevator (going up the plane) with the step surface of tool joint with elevator, when setting, only bears in rig floor the axial load of vertical direction, the hinge jaw of elevator because of being collapsed, is held lateral force overload elevator, cause taking place security incident, can carry out round trip convenient, safely, quickly.The step of tool joint adopts this structure design to make the elevator stepped portions of tool joint exist very big stress to concentrate, and usually can produce and bore the root fatigue crack, becomes the multiple point of thorn leakage effect accident.In order to improve the stress distribution of drilling rod root, reduce stress and concentrate, the someone has designed the ramp stage structure.Show that through the The field practice thorn leakage effect accident of tool joint slope step is starkly lower than right angle step.It is the inclined-plane that but tool joint slope step sets contact surface, because of stressed excessive, causes the drop accident in shaft bottom of drill string when elevator hinge lock in use taking place opening.
The utility model content
The purpose of this utility model is: a kind of tool joint of double step is provided, changes the structure of external surface step between tool joint body and the joint weldering neck, can make cooperation between tool joint step and the elevator, the stress that overcomes drilling rod is concentrated the generation fatigue crack.The elevator hinge lock pin that overcomes slope step existence jumps to convince by patient analysis and causes the drilling string not well braked risk.
The technical solution adopted in the utility model is: the tool joint of double step, mainly to form by joint weldering neck and joint body, and joint body is that the API internal thread is arranged in the cylinder bodily form, joint weldering neck has centre bore for the cylinder bodily form.It is characterized in that: the external surface between joint weldering neck and joint body has right angle step and slope step.Between joint body and right angle step, chamfering is arranged.Transition arc on the junction of right angle step and slope step has has following transition arc at slope step and joint weldering neck external surface junction.
Described right angle step is the annular plane, and right angle step is perpendicular to joint weldering neck and joint body center line.
Described slope step is the circular cone mesa shape, and the gradient of slope step is 18 ° (angle of slope step surface axis and joint weldering neck and joint body center line is 18 °).The length of slope step is 25mm.
The described radius of going up transition arc is 6.4mm; The radius of following transition arc is 38mm.
Slope step and joint weldering neck external surface carry out roll extrusion to following transition arc after the fine finishining and handle by transition arc is smooth excessively down; Last transition arc smooth transition is arranged between right angle step and the slope step, after the fine finishining last transition arc is carried out cold rolling and handle, effectively improve herein the stress of physical dimension catastrophe point and concentrate, improve the ability of antifatigue, reduce the risk of germinating fatigue crack.
The beneficial effects of the utility model: the utility model double step tool joint box, existing right angle step has 18 ° of slope steps again, compound ledge structure makes tool joint box have good stress distribution, and the step chamfering circular arc that has the fatigue failure risk is carried out cold rolling handle, effectively reduce failure accidents, improved the security reliability of drilling rod when rig floor sets simultaneously.
Description of drawings
Fig. 1 is the tool joint structural profile schematic diagram of the utility model double step.
Among the figure, 1. right angle step, 2. chamfering 3. goes up transition arc, and 4. the slope step 5. descends transition arc, 6. joint weldering neck, 7. joint body.
The specific embodiment
Embodiment 1: the tool joint with a double step is an example, and the utility model is described in further detail.
Consult Fig. 1.The tool joint of the utility model double step mainly is made up of joint weldering neck 6 and joint body 7, and joint body 7 is for having the API internal thread in the cylinder bodily form, and joint weldering neck 6 has centre bore for the cylinder bodily form.
External surface between joint weldering neck 6 and joint body 7 has right angle step 1 and slope step 4.Right angle step 1 is the annular plane, and right angle step 1 is perpendicular to joint weldering neck 6 and joint body 7 center lines.Between joint body 7 and right angle step 1, chamfering 2 is arranged.Chamfering 2 is 45 ° of chamferings, chamfer dimesion 2 * 2mm.There is transition arc 3 on junction at right angle step 1 and slope step 4, and the radius of last transition arc 3 is 6.4mm; Last transition arc 3 connects slope step 4.Slope step 4 is the circular cone mesa shape, and the gradient of slope step 4 is 18 °.Slope step 4 is 18 ° with the angle of joint weldering neck 6 and joint body 7 center lines.The height of slope step 4 (vertical length) is 25mm.In slope step 4 and joint weldering neck 6 external surface junctions following transition arc 5 is arranged, the radius of following transition arc 5 is 38mm.
Claims (4)
1. the tool joint of a double step, mainly form by joint weldering neck (6) and joint body (7), joint body (7) has the API internal thread in the cylinder bodily form, joint weldering neck (6) has centre bore for the cylinder bodily form, it is characterized in that: the external surface between joint weldering neck (6) and joint body (7) has right angle step (1) and slope step (4), between joint body (7) and right angle step (1), chamfering (2) is arranged, there is last transition arc (3) junction at right angle step (1) and slope step (4), in slope step (4) and joint weldering neck (6) external surface junction following transition arc (5) is arranged.
2. the tool joint of double step according to claim 1 is characterized in that: described right angle step (1) is the annular plane, and right angle step (1) is perpendicular to joint weldering neck (6) and joint body (7) center line.
3. the tool joint of double step according to claim 1 is characterized in that: described slope step (4) is the circular cone mesa shape, and the gradient of slope step (4) is 18 °, and the length of slope step (4) is 25mm.
4. the tool joint of double step according to claim 1 is characterized in that: the described radius of going up transition arc (3) is 6.4mm; Following transition arc (5) be 38mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201730449U CN201474624U (en) | 2009-09-02 | 2009-09-02 | Drill rod joint with double steps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201730449U CN201474624U (en) | 2009-09-02 | 2009-09-02 | Drill rod joint with double steps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201474624U true CN201474624U (en) | 2010-05-19 |
Family
ID=42410872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201730449U Expired - Lifetime CN201474624U (en) | 2009-09-02 | 2009-09-02 | Drill rod joint with double steps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201474624U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003153A (en) * | 2010-11-02 | 2011-04-06 | 中国石油化工股份有限公司 | Method for suspending trip and device thereof |
| CN102877797A (en) * | 2011-07-15 | 2013-01-16 | 中国石油天然气集团公司 | Elevator-step free directional crossing dedicated tool joint |
-
2009
- 2009-09-02 CN CN2009201730449U patent/CN201474624U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003153A (en) * | 2010-11-02 | 2011-04-06 | 中国石油化工股份有限公司 | Method for suspending trip and device thereof |
| CN102003153B (en) * | 2010-11-02 | 2013-03-27 | 中国石油化工股份有限公司 | Method for suspending trip and device thereof |
| CN102877797A (en) * | 2011-07-15 | 2013-01-16 | 中国石油天然气集团公司 | Elevator-step free directional crossing dedicated tool joint |
| CN102877797B (en) * | 2011-07-15 | 2015-12-02 | 中国石油天然气集团公司 | Without elevator step directional traversing drill rod special joint |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201650256U (en) | Ball seat type cracking slide sleeve | |
| CN201705226U (en) | Integral type double-shoulder sulfur resistant drill rod | |
| CN201474624U (en) | Drill rod joint with double steps | |
| CN109236194B (en) | Titanium alloy drill rod for steel joint | |
| CN202900066U (en) | Externally-flush geological drill rod using double-top double-cone connection form | |
| CN202039785U (en) | Durable drill pipe joint with ultrahigh torsional strength | |
| CN202810736U (en) | Thermal recovery horizontal well expansion pipe hanger | |
| CN201013259Y (en) | High torsion resistance tubing | |
| CN204827306U (en) | Give up safely | |
| CN203081365U (en) | Horizontal well logging anti-top unlocking device | |
| CN201943597U (en) | Hydraulic safety connector | |
| CN201851031U (en) | Thick-walled drill pipe | |
| CN202325408U (en) | Outer sliding sleeve reverse circulation short section | |
| CN201756919U (en) | Threaded connection structure for operation oil pipe | |
| CN201671572U (en) | Novel elevator | |
| CN110359859A (en) | A kind of quickly upper button varying pitch ultrahigh anti-torsion tool joint | |
| CN201723189U (en) | Multi-way releasing device | |
| CN202273635U (en) | Climbing type reducing blowout preventer | |
| CN201972629U (en) | Threaded structure of drill rod | |
| CN203729903U (en) | Extremely-high anti-torsional thread connection device | |
| CN105888572A (en) | Double-shoulder drilling tool screwed joint | |
| CN215485902U (en) | Alloy wear-resistant drill rod for coal mining | |
| CN203403830U (en) | Aluminum alloy drill pipe structure for wire-line coring drilling | |
| CN201474626U (en) | Reverse buckle double joint | |
| CN202325288U (en) | Back-off safety joint |
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: 20100519 |