CN203129973U - Small-dimension drill stem - Google Patents
Small-dimension drill stem Download PDFInfo
- Publication number
- CN203129973U CN203129973U CN 201320149159 CN201320149159U CN203129973U CN 203129973 U CN203129973 U CN 203129973U CN 201320149159 CN201320149159 CN 201320149159 CN 201320149159 U CN201320149159 U CN 201320149159U CN 203129973 U CN203129973 U CN 203129973U
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- Prior art keywords
- drill stem
- joint
- small
- female joint
- drilling rod
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Abstract
The utility model relates to a slim-hole workover treatment tool, in particular to a small-dimension drill stem. A female joint is designed at the upper end of the drill stem; a male joint is designed at the lower end of the drill stem; screw threads on the female joint and the male joint are number style connection threads-23 (NC23) threads of the API (American petroleum institute) standard; seal circular beads are respectively designed on the female joint and the male joint; the external diameter of the female joint is 76mm; and the drill stem is 8700mm long. According to the small-dimension drill stem provided by the utility model, threaded connection points are reduced, the connection tightness is good, and an annular space between the joints and a sleeve is enlarged. The defects of an existing geological drill stem that the drill stem is short, the connection is troublesome, the threaded connection points are numerous, the connection tightness is poor, a gap between the joints and the wall of the sleeve is small, and the sleeve can be easily abraded are overcome.
Description
Technical field:
The utility model relates to a kind of slim-hole workover treatment instrument, particularly a kind of small-sized drilling rod.
Background technology:
The drilling rod that operation team uses in the slim-hole workover treatment generally is the geologic drilling rod of gas thread button-type made in Great Britain at present, the average every length of this drilling rod has only 4 meters, two ends are the pin thread screw thread, the strap wrenches groove, all " common gas thread made in Great Britain was converted to the NC23 button-type, uses very trouble and inapplicable with 2 with crossover sub when its per two geologic drilling rods connected.Because geologic drilling rod length is shorter, causes usage quantity bigger, the crossover sub usage quantity is just very many like this, and the number of spots that is threaded is numerous, occurs the accident of drilling tool thread failure in drillng operation probably.Do not have sealing shoulder during its screw thread conversion simultaneously, use the unsintered tape sealing usually, there is very big risk in this drilling assembly mode in drillng operation, is easy to cause sealing bad and cause the appearance of drilling fluid leakage phenomenon.Owing to transform joint external diameter bigger (joint external diameter 79mm, cover external diameter of pipe 85mm), cause its gap with casing wall narrow and small, easy wear sleeve causes sleeve pipe damage phenomenon.
The utility model content:
The technical problems to be solved in the utility model provides a kind of small-sized drilling rod, and this device has been realized reducing and has been threaded a little, connects good airproof performance, increases the annular space between joint and the sleeve pipe.It is short to have overcome existing geologic drilling rod length, connects trouble, and it is a little many to be threaded, and it is poor to connect sealing, and the gap of joint and casing wall is little, the deficiency of sleeve pipe easy to wear.
Technical solution adopted in the utility model is: a kind of small-sized drilling rod, this drilling rod external diameter 60.3mm; The design of this drilling rod upper end has female joint, and the lower end design has male joint, and the screw thread in female joint and the male joint adopts API standard N C23 button-type, in female joint and the male joint all design sealing shoulder, female joint external diameter are arranged is 76mm, this run of steel is 8700mm.
This drilling rod adopts low-alloy structural steel to make.
The beneficial effects of the utility model are: the utility model is because design length is 8700mm, thereby has and reduce the effect be threaded a little; Owing to adopted the mode that in female joint and male joint, all designs sealing shoulder, thereby had the advantage that connects good airproof performance; Owing to the female joint external diameter is designed to 76mm, thereby has the advantage that increases the annular space between joint and the sleeve pipe.
Description of drawings:
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is structural representation of the present utility model.
The specific embodiment:
As shown in Figure 1, a kind of small-sized drilling rod, this drilling rod external diameter 60.3mm; The design of this drilling rod upper end has female joint, and the lower end design has male joint, and the screw thread in female joint and the male joint adopts API standard N C23 button-type, in female joint and the male joint all design sealing shoulder, female joint external diameter are arranged is 76mm, this run of steel is 8700mm.This drilling rod adopts low-alloy structural steel to make.
Be understandable that, more than about specific descriptions of the present utility model, only for the utility model being described and being not to be subject to the described technical scheme of the utility model embodiment, those of ordinary skill in the art is to be understood that, still can make amendment or be equal to replacement the utility model, to reach identical technique effect; Use needs as long as satisfy, all within protection domain of the present utility model.
Claims (2)
1. small-sized drilling rod, this drilling rod external diameter 60.3mm; It is characterized in that: this drilling rod upper end design has female joint, the lower end design has male joint, and the screw thread in female joint and the male joint adopts API standard N C23 button-type, and all designing in female joint and the male joint has sealing shoulder, the female joint external diameter is 76mm, and this run of steel is 8700mm.
2. according to the described small-sized drilling rod of claim 1, it is characterized in that: described this drilling rod adopts low-alloy structural steel to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149159 CN203129973U (en) | 2013-03-28 | 2013-03-28 | Small-dimension drill stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149159 CN203129973U (en) | 2013-03-28 | 2013-03-28 | Small-dimension drill stem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203129973U true CN203129973U (en) | 2013-08-14 |
Family
ID=48937964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320149159 Expired - Fee Related CN203129973U (en) | 2013-03-28 | 2013-03-28 | Small-dimension drill stem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203129973U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696948A (en) * | 2016-04-08 | 2016-06-22 | 中石化石油工程技术服务有限公司 | Drill rod for well repair side tracking |
-
2013
- 2013-03-28 CN CN 201320149159 patent/CN203129973U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105696948A (en) * | 2016-04-08 | 2016-06-22 | 中石化石油工程技术服务有限公司 | Drill rod for well repair side tracking |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20160328 |