CN201671552U - Depth marking ring of oil well casing - Google Patents
Depth marking ring of oil well casing Download PDFInfo
- Publication number
- CN201671552U CN201671552U CN2010201773428U CN201020177342U CN201671552U CN 201671552 U CN201671552 U CN 201671552U CN 2010201773428 U CN2010201773428 U CN 2010201773428U CN 201020177342 U CN201020177342 U CN 201020177342U CN 201671552 U CN201671552 U CN 201671552U
- Authority
- CN
- China
- Prior art keywords
- oil well
- well casing
- depth
- marking ring
- depth marking
- 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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Abstract
The utility model relates to a depth marking ring of an oil well casing, which is characterized in that the walls of two semicircular cylinders (2) are respectively processed with a screw hole along the direction parallel to the tangent line, and are connected by bolts (3) to form a whole cylinder. The depth marking ring has the advantages of simple structure, convenient processing and reliable working, is installed on the oil well casing to establish a depth datum mark in operation of drilling completion, and can realize no-clearance fit with the outer diameter of the casing (1), thus ensuring normal working of monitoring instruments and accuracy of underground depth positioning.
Description
Technical field: the utility model relates to a kind of oil field downhole tool, especially for a kind of oil well casing depth mark ring of drilling completion.
Background technology: before the utility model, each oil field is in drillng operation, for guaranteeing the construction precision of completion all kinds of underground work of oil well later on, the general method that is adopted is marker loop cylindraceous of (in the certain depth scope) suit on casing string, benchmark as the down-hole depth monitoring, because the needs of installing, marker loop internal diameter cylindraceous must be greater than the cover external diameter of pipe, make and produce certain clearance between the two, thereby cause the monitoring instrument error to increase, had a strong impact on the degree of accuracy of down-hole depth localization.
Summary of the invention: the purpose of this utility model is to provide a kind of oil well casing depth mark ring for oil drilling, because this device is two semicircular cylinder structures, connect and be fixed on the casing string by bolt, realized that the marker loop internal diameter cooperates with the no gap of cover external diameter of pipe, thereby guaranteed the operate as normal of monitoring instrument and the degree of accuracy of down-hole depth localization.
The purpose of this utility model realizes by following measure: a kind of oil well casing depth mark ring, be to constitute by semicircle cylindrical shell and bolt, the barrel upper edge tangent line parallel direction that it is characterized in that two semicircle cylindrical shells all is processed with screw, and connects and composes a complete cylinder by bolt.
The utility model is reasonable in design, simple in structure, easy to process, reliable operation, be installed in and set up on the oil well casing in the depth datum sign being used for completion practice, can realize that the marker loop internal diameter cooperates with the no gap of cover external diameter of pipe, thereby guarantee the operate as normal of monitoring instrument and the degree of accuracy of down-hole depth localization.
Description of drawings: Fig. 1 is the structural representation of oil well casing depth mark ring.
Oil well casing depth mark ring is to be made of semicircle cylindrical shell 2 and bolt 3, and the barrel upper edge tangent line parallel direction of two semicircle cylindrical shells 2 all is processed with screw, and connects and composes a complete cylinder by bolt 3.
The specific embodiment: the operating principle and the using method of oil well casing depth mark ring are: earlier two semicircle cylindrical shells 2 are buckled on sleeve pipe 1 outer tube wall, then by bolt 3 connections and fixing, again by desired depth position under the setting of casing construction lower going-into-well; When needs carry out the down-hole depth monitoring,, thereby the operate as normal of monitoring instrument and the degree of accuracy of down-hole depth localization have been guaranteed owing to oil well casing depth mark ring cooperates with the no gap of sleeve pipe 1 external diameter.
Claims (1)
1. an oil well casing depth mark ring is to be made of semicircle cylindrical shell and bolt, it is characterized in that: the barrel upper edge tangent line parallel direction of two semicircle cylindrical shells all is processed with screw, and connects and composes a complete cylinder by bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201773428U CN201671552U (en) | 2010-04-03 | 2010-04-03 | Depth marking ring of oil well casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201773428U CN201671552U (en) | 2010-04-03 | 2010-04-03 | Depth marking ring of oil well casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201671552U true CN201671552U (en) | 2010-12-15 |
Family
ID=43328964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201773428U Expired - Fee Related CN201671552U (en) | 2010-04-03 | 2010-04-03 | Depth marking ring of oil well casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201671552U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298474A (en) * | 2014-07-28 | 2016-02-03 | 中国石油天然气股份有限公司 | Sound marker |
-
2010
- 2010-04-03 CN CN2010201773428U patent/CN201671552U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298474A (en) * | 2014-07-28 | 2016-02-03 | 中国石油天然气股份有限公司 | Sound marker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20140403 |