CN202970521U - Dual-function combined joint with right-hand threads and left-hand threads - Google Patents
Dual-function combined joint with right-hand threads and left-hand threads Download PDFInfo
- Publication number
- CN202970521U CN202970521U CN 201220712616 CN201220712616U CN202970521U CN 202970521 U CN202970521 U CN 202970521U CN 201220712616 CN201220712616 CN 201220712616 CN 201220712616 U CN201220712616 U CN 201220712616U CN 202970521 U CN202970521 U CN 202970521U
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- hand thread
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Abstract
The utility model discloses a dual-function combined joint with right-hand threads and left-hand threads. The dual-function combined joint is composed of an upper joint body and lower joint bodies, wherein the upper joint body is connected with a square drill pipe, lower joint bodies are connected with the upper joint body and a drill pipe, an inner thread which is connected with a thread at the lower end of the square drill pipe is arranged at the upper end of the upper joint body, and an outer thread is arranged at the lower end of the upper joint body. The dual-function combined joint is characterized in that the first left-hand thread is arranged inside a nozzle of the upper joint body, a first thread which is connected with the outer thread of the upper joint body is arranged at the upper end of the first lower joint body, a second thread which is connected with a right-hand thread drill pipe is arranged at the lower end of the first lower joint body, the second left-hand thread which is connected with the left-hand thread of the upper joint body is arranged at the upper end of the second lower joint body, and the third left-hand thread which is connected with a left-hand thread drill pipe is arranged at the lower end of the second lower joint body. The dual-function combined joint is applicable to field operation such as casing milling, fishing and upturning treatment of underground 'fishes' during underground drilling tool jamming accidents in well drilling and trial maintenance operation.
Description
Technical field
The utility model relates to joint, is specifically related to the difunctional built-up joint of positive left-hand thread.
Background technology
In drillng operation, the phenomenons such as drilling tool is disconnected, bit freezing easily appear usually, and cause thus drilling tool fall in well or be stuck in well.In order to process such down-hole accident, usually at drilling tool bottom joint, then mill fishing tool in joint bottom female connector.During processing, at first need to can connect the top connection of right-hand drill pipe in kelly bar lower end welding, realization is milled the cover of down-hole bit freezing drilling tool " fish ", after cover mills and completes, need to unload the top connection that is connected with kelly bar, again welding can connect the top connection of left-hand screw drill pipe, completes the salvaging to down-hole equipment " fish ".So Rewelding, easily damage kelly bar and joint, extends the time of processing accident.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of positive left-hand thread difunctional built-up joint.
In order to address the above problem, according to the technical solution of the utility model, the positive difunctional built-up joint of left-hand thread forms with top connection and the joining lower contact of drilling rod by reaching with the joining top connection of kelly bar; Wherein the top connection upper end is provided with and the joining internal thread of kelly bar lower end screw thread, the top connection lower end is provided with external screw thread, it is characterized in that: be provided with left hand thread one in the hydrophthalmia of top connection, lower contact one upper end is provided with and the joining screw thread one of the external screw thread of top connection, and lower contact one lower end is provided with and the joining screw thread two of right-hand drill pipe; Lower contact two upper ends are provided with and the joining left hand thread two of the left hand thread of top connection, and lower contact two lower ends are provided with and the joining left hand thread three of left-hand screw drill pipe.This built-up joint can be when underground drill stem generation bit freezing; do not need to unload by the lower contact of changing built-up joint dextrorotation and the derotation that the top connection that is connected with kelly bar realizes drilling rod; reach to satisfy with right-hand drill pipe, the cover of down-hole bit freezing drilling tool " fish " to be milled and to overlap and mill rear purpose of down-hole equipment " fish " being salvaged back-off with left-hand screw drill pipe; thereby avoided the Rewelding between kelly bar and crossover sub; both protect kelly bar, saved again the time of processing accident
According to the preferred version of the difunctional built-up joint of positive left-hand thread described in the utility model, described left hand thread one is 4
1/
2FH left hand thread; Described external screw thread is 6
5/
8The FH screw thread.
The beneficial effect of the difunctional built-up joint of positive left-hand thread described in the utility model is: when the utility model is used alternatingly positive left-hand screw drill pipe in processing the down-hole lock of tool drilling, only need to change the lower contact of built-up joint, do not need to unload the top connection that is connected with kelly bar and can realize that the drill string cover mills, salvages the dual-use function of back-off, avoided the Rewelding between kelly bar and crossover sub, kelly bar and joint have been protected, save the time of processing accident, reduced labour intensity; The utility model is applicable to drilling well, examination is repaiied when occurring the down-hole lock of tool drilling in operation, needs down-hole " fish " overlapped to mill, salvage the construction operation that back-off is processed.
Description of drawings
Fig. 1 is the structural representation that the difunctional built-up joint of positive left-hand thread described in the utility model connects right-hand drill pipe.
Fig. 2 is the structural representation that the difunctional built-up joint of positive left-hand thread described in the utility model connects left-hand screw drill pipe.
The specific embodiment
Referring to Fig. 1, the positive difunctional built-up joint of left-hand thread forms with top connection 1 and joining lower contact one 2a of drilling rod, lower contact two 2b by reaching with the joining top connection 1 of kelly bar; Wherein top connection 1 upper end is provided with and the joining internal thread 3 of kelly bar lower end screw thread, top connection 1 lower end is provided with external screw thread 4, be provided with left hand thread 5 in the hydrophthalmia of top connection 1, lower contact one 2a upper end is provided with and the joining screw thread 1 of the external screw thread 4 of top connection 1, and lower contact one 2a lower end is provided with and the joining screw thread 27 of right-hand drill pipe; Lower contact two 2b upper ends are provided with and the joining left hand thread 28 of the left hand thread 5 of top connection 1, and lower contact two 2b lower ends are provided with and the joining left hand thread 39 of left-hand screw drill pipe.
Wherein, described left hand thread 5 is 4
1/
2FH left hand thread; Described external screw thread 4 is 6
5/
8The FH screw thread; Screw thread 27 is 4
1/
2The IF screw thread; Described left hand thread 28 is 4
1/
2FH left hand thread; Described left hand thread 39 is 4
1/
2IF left hand thread.
During concrete the use, at first after the lower contact screw thread of the top connection internal thread 3 of the difunctional built-up joint of positive left-hand thread and kelly bar being linked closely by the standard torque value, be symmetrically welded in top connection 1 and outside enforcement of kelly bar lower contact by two block length bar shaped iron blocks, both are connected as a single entity.Implementing cover, when right-hand drill pipe is used in milling operation, linking with screw thread 1 and the top connection external screw thread 4 of lower contact one 2a, screw thread 27 and the right-hand drill pipe of lower contact one 2a link, and realize positive pivoted housing, the milling operation of drill string; When implementing back-off operation use left-hand screw drill pipe, left hand thread 28 and the top connection left hand thread 5 of lower contact two 2b link, and lower contact 2b left hand thread 39 links with left-hand screw drill pipe, realizes the counter-rotating back-off operation of drill string.
Claims (2)
1. the positive difunctional built-up joint of left-hand thread, form with top connection (1) and the joining lower contact of drilling rod (2a, 2b) by reaching with the joining top connection of kelly bar (1); Wherein top connection (1) upper end is provided with and the kelly bar joining internal thread of lower end screw thread (3), top connection (1) lower end is provided with external screw thread (4), it is characterized in that: be provided with left hand thread one (5) in the hydrophthalmia of top connection (1), lower contact one (2a) upper end is provided with and the joining screw thread one (6) of the external screw thread (4) of top connection (1), and lower contact one (2a) lower end is provided with and the joining screw thread two (7) of right-hand drill pipe; Lower contact two (2b) upper end is provided with and the joining left hand thread two (8) of the left hand thread one (5) of top connection (1), and lower contact two (2b) lower end is provided with and the joining left hand thread three (9) of left-hand screw drill pipe.
2. the difunctional built-up joint of positive left-hand thread according to claim 1, it is characterized in that: described left hand thread is 4
1/
2FH left hand thread; Described external screw thread (4) is 6
5/
8The FH screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712616 CN202970521U (en) | 2012-12-21 | 2012-12-21 | Dual-function combined joint with right-hand threads and left-hand threads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712616 CN202970521U (en) | 2012-12-21 | 2012-12-21 | Dual-function combined joint with right-hand threads and left-hand threads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202970521U true CN202970521U (en) | 2013-06-05 |
Family
ID=48511609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220712616 Expired - Fee Related CN202970521U (en) | 2012-12-21 | 2012-12-21 | Dual-function combined joint with right-hand threads and left-hand threads |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202970521U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869847A (en) * | 2015-12-11 | 2017-06-20 | 贵州高峰石油机械股份有限公司 | A kind of underground right-hand thread drilling tool Refloatation method and the back-off joint for being used |
| CN107080604A (en) * | 2016-02-16 | 2017-08-22 | 微创心脉医疗科技（上海）有限公司 | Quick union component, induction system and its application process |
| CN107605414A (en) * | 2017-11-02 | 2018-01-19 | 北京泰利新能源科技发展有限公司 | A kind of back-off joint |
-
2012
- 2012-12-21 CN CN 201220712616 patent/CN202970521U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869847A (en) * | 2015-12-11 | 2017-06-20 | 贵州高峰石油机械股份有限公司 | A kind of underground right-hand thread drilling tool Refloatation method and the back-off joint for being used |
| CN107080604A (en) * | 2016-02-16 | 2017-08-22 | 微创心脉医疗科技（上海）有限公司 | Quick union component, induction system and its application process |
| CN107605414A (en) * | 2017-11-02 | 2018-01-19 | 北京泰利新能源科技发展有限公司 | A kind of back-off joint |
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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 |
Granted publication date: 20130605 Termination date: 20151221 |
|
| EXPY | Termination of patent right or utility model |