CN105239931A - Safety joint - Google Patents
Safety joint Download PDFInfo
- Publication number
- CN105239931A CN105239931A CN201510727218.1A CN201510727218A CN105239931A CN 105239931 A CN105239931 A CN 105239931A CN 201510727218 A CN201510727218 A CN 201510727218A CN 105239931 A CN105239931 A CN 105239931A
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- CN
- China
- Prior art keywords
- joint
- top connection
- lower contact
- pins
- sphere
- 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.)
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Abstract
The invention relates to the technical field of drilling and production of oil fields and oil wells, in particular to a safety joint. The safety joint comprises an upper joint, a lower joint, pins and a sphere, wherein an annular clamping table is arranged at the periphery of the lower joint; the lower joint is inserted in the upper joint; the lower part of the upper joint is clamped on the annular clamping table; and the pins are fixed on the side walls of the upper joint and the lower joint for connecting the upper joint with the lower joint. Compared with the prior art, when the sphere dose not enter, inner cavities of the upper and lower joints are in a communicated state; when the sphere enters, the inner cavities of the upper and lower joints are in a sealed state; and when the pressure reaches a certain degree, the pins are shortened, and the upper and lower joints realize the separation. The condition of insufficient torque cannot be generated; the upper and lower joints can be quickly separated; and the part above the upper joint can quickly leave from a well for maintenance.
Description
Technical field
The present invention relates to oilfield drilling and production technology field, particularly relate to a kind of safety joint.
Background technology
Oil well casing causes sleeve pipe to occur leakage phenomena because of reasons such as cementing quality, connecting thread, ground movement, corrosions, brings unfavorable factor to oil well measure construction and affects crude output.Once leakage situation appears in the non-payzone of oil well, must leakage points be determined before enforcement is repaired, now verify that the method for casing leakage point generally adopts packer, close oil jacket annular space at the above position of payzone, by sleeve pipe pressuring method, sleeve pipe is verified.But existing a few money packers are tested in cover work progress in enforcement, have unfavorable factor in varying degrees, cause construction to have some setbacks, can not accurately judge leak position problem.In addition, the joint connecting packer, due to generally all below three kms, if joint bottom is damaged, just needs to mention upper part, existing upper lower contact is that left-hand thread connects, when well chin-deep, during the degree of depth of such as down-hole three km, torque should not be sent to, and causes lower contact, separation difficulty.
Summary of the invention
The object of the invention is to the deficiency overcoming above-mentioned technology, and a kind of safety joint is provided, be convenient to lower contact and be separated.
The present invention for achieving the above object, by the following technical solutions: a kind of safety joint, comprise top connection, lower contact, pin and spheroid, the ring week of described lower contact is provided with annular chuck, described lower contact is inserted in described top connection, the bottom of described top connection is locked in described annular chuck, and described pin is fixed on the sidewall of described top connection and lower contact, is linked together by described upper and lower joint.Relative to prior art, this device is not when spheroid enters, and upper and lower joint inner chamber is UNICOM's state, when spheroid enters, becomes sealing state, and when pressure reaches a timing, pin is cut short, and upper lower contact realizes being separated.The situation of moment of torsion deficiency can not be gone out, can fast upper and lower joint be separated, ensure that top connection can be keeped in repair from well fast with upper part.
Preferably, sealing ring is provided with between described upper and lower joint.Ensure the sealing of upper and lower joint at sealing state.
The invention has the beneficial effects as follows: relative to prior art, this device is not when spheroid enters, and upper and lower joint inner chamber is UNICOM's state, when spheroid enters, becomes sealing state, and when pressure reaches a timing, pin is cut short, and upper lower contact realizes being separated.The situation of moment of torsion deficiency can not be gone out, can fast upper and lower joint be separated, ensure that top connection can be keeped in repair from well fast with upper part.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is sealing state schematic diagram in the present invention;
Fig. 3 is released state schematic diagram in the present invention.
Detailed description of the invention
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing and preferred embodiment.As shown in Figure 1 to Figure 3, a kind of safety joint, comprise top connection 1, lower contact 2, pin 3 and spheroid 4, described lower contact be provided with annular chuck 5 ring week, described lower contact is inserted in described top connection, the bottom of described top connection is locked in described annular chuck, and described pin is fixed on the sidewall of described top connection and lower contact, is linked together by described upper and lower joint.Relative to prior art, this device is not when spheroid enters, and upper and lower joint inner chamber is UNICOM's state, when spheroid enters, becomes sealing state, and when pressure reaches a timing, pin is cut short, and upper lower contact realizes being separated.The situation of moment of torsion deficiency can not be gone out, can fast upper and lower joint be separated, ensure that top connection can be keeped in repair from well fast with upper part.Sealing ring 6 is provided with between described upper and lower joint.Ensure the sealing of upper and lower joint at sealing state.
Relative to prior art, this device is not when spheroid enters, and upper and lower joint inner chamber is UNICOM's state, when spheroid enters, becomes sealing state, and when pressure reaches a timing, pin is cut short, and upper lower contact realizes being separated.The situation of moment of torsion deficiency can not be gone out, can fast upper and lower joint be separated, ensure that top connection can be keeped in repair from well fast with upper part.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. a safety joint, it is characterized in that: comprise top connection, lower contact, pin and spheroid, the ring week of described lower contact is provided with annular chuck, described lower contact is inserted in described top connection, the bottom of described top connection is locked in described annular chuck, described pin is fixed on the sidewall of described top connection and lower contact, is linked together by described upper and lower joint.
2. safety joint according to claim 1, is characterized in that: be provided with sealing ring between described upper and lower joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510727218.1A CN105239931A (en) | 2015-10-30 | 2015-10-30 | Safety joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510727218.1A CN105239931A (en) | 2015-10-30 | 2015-10-30 | Safety joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105239931A true CN105239931A (en) | 2016-01-13 |
Family
ID=55037725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510727218.1A Pending CN105239931A (en) | 2015-10-30 | 2015-10-30 | Safety joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105239931A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538134A (en) * | 2017-09-15 | 2019-03-29 | 刘玉友 | The application method of apparatus for work under a kind of oil well |
-
2015
- 2015-10-30 CN CN201510727218.1A patent/CN105239931A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538134A (en) * | 2017-09-15 | 2019-03-29 | 刘玉友 | The application method of apparatus for work under a kind of oil well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160113 |
|
| WD01 | Invention patent application deemed withdrawn after publication |