CN107939303A - High strength safe type drilling rod - Google Patents
High strength safe type drilling rod Download PDFInfo
- Publication number
- CN107939303A CN107939303A CN201711173898.2A CN201711173898A CN107939303A CN 107939303 A CN107939303 A CN 107939303A CN 201711173898 A CN201711173898 A CN 201711173898A CN 107939303 A CN107939303 A CN 107939303A
- Authority
- CN
- China
- Prior art keywords
- drilling rod
- thread
- shoulder
- drilling
- small end
- 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.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 75
- 238000005728 strengthening Methods 0.000 claims abstract description 5
- 239000011324 bead Substances 0.000 abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 3
- 230000006870 function Effects 0.000 abstract description 3
- 230000009993 protective function Effects 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- 230000009977 dual effect Effects 0.000 abstract description 2
- 239000011593 sulfur Substances 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1042—Elastomer protector or centering means
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of high strength safe type drilling rod, using CY120N high strength safe type drilling rods, requirement of the sulfur resistance more than IRP1.8 standards；It is by adding a secondary shoulder in the engagement place of pin thread small end and female thread big end at the same time; secondary shoulder forms dual stage shoulder structure with main shoulder; main circular bead surface and thread segment produce certain interference fit; and secondary shoulder then just has in certain auxiliary and anchors bit function; so as to ensure the accurate realization of main circular bead surface and thread segment interference fit; in addition; secondary shoulder can also bear fractional load in working status; play certain overload protective function; and the torsional strength of drilling rod can also be improved, ensure that the security of drilling rod；The pin thread small end of drilling rod body is bucking ladder at the same time, and the bucking ladder forms the strengthening segment of pin thread small end, can improve the bulk strength of drilling rod.The outside of drilling rod adds spring centralizer at the same time, and spring centralizer is used to position on drilling rod, reduces rocking for drilling rod, improve the drilling results of drilling rod.
Description
Technical field
The present invention relates to a kind of high strength safe type drilling rod, belong to oil drill rocker technical field.
Background technology
In the drilling process of oil, natural gas, water source and mineral reserve, it is required for using drilling rod.Drilling rod passes through tool joint
Connect, in During regular rotation, drilling rod will bear the effect of external and internal pressure, axial force, moment of flexure and moment of torsion at the same time.
But common drilling rod intensity is not high, after long-time service, failure accidents can frequently occur for tool joint, make its into
For the principal mode of drilling rod failure.For conventional drilling rod in probing, shaking amplitude is larger, have impact on the drilling results of drilling rod.
The content of the invention
High the purpose of the present invention is to overcome the above shortcomings and to provide a kind of intensity, security is good, small high-strength of shaking amplitude
Spend safety-type drilling rod.
The object of the present invention is achieved like this：
A kind of high strength safe type drilling rod, it includes drilling rod body, and the periphery of the pin thread small end of the drilling rod body is provided with outside
Screw thread, the inner wall of the female thread big end of drilling rod body are provided with internal thread, and the external screw thread of adjacent two drilling rods is engaged with internal thread, made
Obtain two drilling rods to connect, and drilling rod body opens up step in the upper and lower ends of externally threaded upper and lower ends and internal thread
Face, the wherein step of external screw thread lower end and internal thread lower end are main shoulder, and the step of external screw thread upper end and internal thread upper end is pair
Shoulder, while the pin thread small end of drilling rod body is bucking ladder, the bucking ladder forms the strengthening segment of pin thread small end, the drilling rod sheet
The outside of body is cased with multiple spring centralizers, and the spring centralizer is used to position drilling rod body.
High strength safe type drilling rod of the present invention has the following advantages：
High strength safe type drilling rod of the present invention uses CY120N high strength safe type drilling rods, and sulfur resistance is more than IRP1.8 standards
It is required that reducing the harmful element such as P, S in material, the content of the element such as Mo, Cr in steel is improved, can resist the entirety of drilling rod
Sulphur performance is further enhanced；
It is by adding a secondary shoulder, secondary shoulder and main shoulder, that is, shape in the engagement place of pin thread small end and female thread big end at the same time
Shoulder structure in pairs, main circular bead surface and thread segment produce certain interference fit, and secondary shoulder then just has certain auxiliary
On anchor bit function, so as to ensure the accurate realization of main circular bead surface and thread segment interference fit, in addition, secondary shoulder is in working status
In can also bear fractional load, play certain overload protective function, and the torsional strength of drilling rod can also be improved, ensure that drilling rod
Security；
The pin thread small end of drilling rod body is bucking ladder at the same time, and the bucking ladder forms the strengthening segment of pin thread small end, can improve brill
The bulk strength of bar.
The outside of drilling rod adds spring centralizer at the same time, and spring centralizer is used to position on drilling rod, reduces the rolling of drilling rod
It is dynamic, improve the drilling results of drilling rod.
Brief description of the drawings
Fig. 1 is the structure diagram of high strength safe type drilling rod of the present invention.
Fig. 2 is the external screw thread of drilling rod body in Fig. 1, the enlarged drawing at internal thread.
Fig. 3 is the fiting relation figure of drilling rod and spring centralizer in high strength safe type drilling rod of the present invention.
In figure：Drilling rod body 1, external screw thread 2, internal thread 3, main shoulder 4, secondary shoulder 5, bucking ladder 6, spring centralizer 7.
Embodiment
Referring to Fig. 1 to Fig. 3, the present invention relates to a kind of high strength safe type drilling rod, including drilling rod body 1, the drilling rod sheet
The periphery of the pin thread small end of body 1 is provided with external screw thread 2, and the inner wall of the female thread big end of drilling rod body 1 is provided with internal thread 3, adjacent
The external screw thread 2 of two drilling rods is engaged with internal thread 3 so that two drilling rods connect, and drilling rod body 1 is in external screw thread 2
Upper and lower ends and the upper and lower ends of internal thread 3 open up step surface, and the step of wherein 3 lower end of 2 lower end of external screw thread and internal thread is
Main shoulder 4, the step of 3 upper end of 2 upper end of external screw thread and internal thread is secondary shoulder 5, and the outside of the drilling rod body 1 is cased with multiple bullets
Spring centralizer 7, the spring centralizer 7 are used to position drilling rod body 1, prevent drilling rod from rocking.
The main shoulder 4 forms dual stage shoulder structure with secondary shoulder 5, and main shoulder 4 and thread segment produce certain interference and match somebody with somebody
Close, and secondary shoulder 5 then just has in certain auxiliary and anchors bit function, so as to ensure that the interference of main shoulder 4 and thread segment is matched somebody with somebody
The accurate realization closed, in addition, secondary shoulder 5 can also bear fractional load in working status, plays certain overload protective function, and
And the torsional strength of drilling rod can also be improved, it ensure that the security of drilling rod.
The pin thread small end of drilling rod body 1 be bucking ladder 6 at the same time, the strengthening segment of the formation of the bucking ladder 6 pin thread small end, can be with
Improve the bulk strength of drilling rod.
Claims (1)
- A kind of 1. high strength safe type drilling rod, it is characterised in that：It includes drilling rod body（1）, the drilling rod body（1）Pin thread The periphery of small end is provided with external screw thread（2）, drilling rod body（1）The inner wall of female thread big end be provided with internal thread（3）, adjacent two The external screw thread of drilling rod（2）With internal thread（3）Engagement so that two drilling rods connect, and drilling rod body（1）In external screw thread （2）Upper and lower ends and internal thread（3）Upper and lower ends open up step surface, wherein external screw thread（2）Lower end and internal thread（3）Under The step at end is main shoulder（4）, external screw thread（2）Upper end and internal thread（3）The step of upper end is secondary shoulder（5）, while drilling rod sheet Body（1）Pin thread small end be bucking ladder（6）, the bucking ladder（6）Form the strengthening segment of pin thread small end, the drilling rod body（1） Outside be cased with multiple spring centralizers（7）, the spring centralizer（7）For by drilling rod body（1）Positioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711173898.2A CN107939303A (en) | 2017-11-22 | 2017-11-22 | High strength safe type drilling rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711173898.2A CN107939303A (en) | 2017-11-22 | 2017-11-22 | High strength safe type drilling rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107939303A true CN107939303A (en) | 2018-04-20 |
Family
ID=61930704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711173898.2A Pending CN107939303A (en) | 2017-11-22 | 2017-11-22 | High strength safe type drilling rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107939303A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397407A (en) * | 2018-06-19 | 2019-11-01 | 中国地质大学（北京） | A kind of dual stage shoulder conduction drilling rod |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0196339A1 (en) * | 1985-03-07 | 1986-10-08 | Weatherford Oil Tool GmbH | Centralizer for casings and drill pipes |
| CN105804667A (en) * | 2016-05-10 | 2016-07-27 | 江阴德玛斯特钻具有限公司 | Oil drill rod with built-in oil pipes |
| CN205532370U (en) * | 2016-05-04 | 2016-08-31 | 成都德勤精机科技有限公司 | Oil drill pipe's centralizer suitable for different diameters |
| CN106014279A (en) * | 2016-07-13 | 2016-10-12 | 江阴德玛斯特钻具有限公司 | High-strength anti-sulfur drill rod |
-
2017
- 2017-11-22 CN CN201711173898.2A patent/CN107939303A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0196339A1 (en) * | 1985-03-07 | 1986-10-08 | Weatherford Oil Tool GmbH | Centralizer for casings and drill pipes |
| CN205532370U (en) * | 2016-05-04 | 2016-08-31 | 成都德勤精机科技有限公司 | Oil drill pipe's centralizer suitable for different diameters |
| CN105804667A (en) * | 2016-05-10 | 2016-07-27 | 江阴德玛斯特钻具有限公司 | Oil drill rod with built-in oil pipes |
| CN106014279A (en) * | 2016-07-13 | 2016-10-12 | 江阴德玛斯特钻具有限公司 | High-strength anti-sulfur drill rod |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397407A (en) * | 2018-06-19 | 2019-11-01 | 中国地质大学（北京） | A kind of dual stage shoulder conduction drilling rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180420 |
|
| RJ01 | Rejection of invention patent application after publication |