CN2213835Y - Tooth insert type pump-absorb positive and negative circulation special joint - Google Patents
Tooth insert type pump-absorb positive and negative circulation special joint Download PDFInfo
- Publication number
- CN2213835Y CN2213835Y CN 94207247 CN94207247U CN2213835Y CN 2213835 Y CN2213835 Y CN 2213835Y CN 94207247 CN94207247 CN 94207247 CN 94207247 U CN94207247 U CN 94207247U CN 2213835 Y CN2213835 Y CN 2213835Y
- Authority
- CN
- China
- Prior art keywords
- joint
- utility
- model
- tooth
- negative
- 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 - Fee Related
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- Rotary Pumps (AREA)
Abstract
The utility model relates to a tooth insert type pump-absorb positive and negative circulation special joint, which is composed of an upper joint, a lower joint, a sealed tube and an outer sleeve. The utility model is characterized in that the tooth form of the joint is changed into a rectangle from the original trapezoid, the jointing thickness between the teeth of the joint is increased to 15 to 25 millimeters, and the tooth surfaces of the joint are processed by high frequency hardening. The utility model is reasonable in integral structure, the joint between teeth is enhanced, thus the strength of the utility model is enhanced, ensuring that the strength of the tooth root is unchanged and increasing the hardness of friction surfaces. The utility model is high-efficiency and time-saving, is good in sealing performance and long in service life, and is suitable for drilling in positive circulations and negative circulations, especially for negative-circulation drilling.
Description
The utility model relates to a kind of rig tool joint, relates in particular to a kind of castellated pump and inhales positive and negative circulation special joint.
The thread form of existing castellated tool joint is the design of trapezoidal tooth, causes its root link surface too little and form the some contact, makes unbalance stress, and wearing and tearing are very fast.In addition, a little less than the connection too, thickness only has 8 millimeters, tooth is worn and torn easily, and the part that connects between two teeth is fragile between its tooth, and especially top connection often makes whole tooth all be struck off.The heat treatment of alligator fitting in the past is that the root from tooth begins to carry out integral quenching, and the easy like this intensity of tooth root that causes weakens, and fragility increases, and causes whole tooth to be struck off.
The purpose of this utility model is: overcome the defective of prior art, provide a kind of efficient, save time, castellated pump durable in use, that intensity is high inhales positive and negative circulation special joint.
The purpose of this utility model realizes by following scheme: change the thread form of joint into rectangle like, and increase the thickness that connects between tooth.For strengthening the intensity of tooth root, only its tooth surface is carried out high-frequency quenching and handle simultaneously, can reach optimum efficiency of the present utility model.
Accompanying drawing 1: be the utility model top connection and the lower contact half sectional view when chimeric.
Accompanying drawing 2: be the A-A sectional view of accompanying drawing 1.
Below in conjunction with accompanying drawing the utility model is elaborated.
The utility model by top connection 1, lower contact 2, close tube sealing and overcoat is formed, the double wedge 3 of its top connection 1 and the recessed tooth of lower contact 24 are rectangle like.The connection thickness that top connection 1 of the present utility model and lower contact are 2 can be 15 millimeters～25 millimeters.The tooth surface of top connection 1 of the present utility model and lower contact 2 is handled through high-frequency quenching.
The utility model reasonable integral structure has strengthened between tooth and has connect, thereby has improved its intensity greatly, has both guaranteed that the intensity of tooth root was constant, can improve the hardness of attrition surface again, can reach HRC45-50.The utility model is efficient, save time, good airproof performance, long service life, be applicable to positive reverse circulation drilling, is particularly useful for reverse circulation drilling.
Claims (2)
1, a kind of castellated pump is inhaled positive and negative circulation special joint, it by upper and lower joint (1,2), close tube sealing and overcoat is formed, it is characterized in that: the double wedge (3) of top connection (1) is rectangle with the recessed tooth (4) of lower contact (2).
2, castellated pump according to claim 1 is inhaled positive and negative circulation special joint, it is characterized in that: the scope that connects thickness between the tooth of top connection (1) and lower contact (2) is 15 millimeters～25 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94207247 CN2213835Y (en) | 1994-03-15 | 1994-03-15 | Tooth insert type pump-absorb positive and negative circulation special joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94207247 CN2213835Y (en) | 1994-03-15 | 1994-03-15 | Tooth insert type pump-absorb positive and negative circulation special joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2213835Y true CN2213835Y (en) | 1995-11-29 |
Family
ID=33825627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94207247 Expired - Fee Related CN2213835Y (en) | 1994-03-15 | 1994-03-15 | Tooth insert type pump-absorb positive and negative circulation special joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2213835Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080506A (en) * | 2010-12-13 | 2011-06-01 | 郭振国 | Drill rod used for engineering driller |
| CN102536129A (en) * | 2011-12-30 | 2012-07-04 | 中国地质大学（武汉） | Quick connector used for intelligent flexible pipe drilling device |
-
1994
- 1994-03-15 CN CN 94207247 patent/CN2213835Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080506A (en) * | 2010-12-13 | 2011-06-01 | 郭振国 | Drill rod used for engineering driller |
| CN102536129A (en) * | 2011-12-30 | 2012-07-04 | 中国地质大学（武汉） | Quick connector used for intelligent flexible pipe drilling device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |