CN105178881A - Oil tube test joint - Google Patents
Oil tube test joint Download PDFInfo
- Publication number
- CN105178881A CN105178881A CN201510730695.3A CN201510730695A CN105178881A CN 105178881 A CN105178881 A CN 105178881A CN 201510730695 A CN201510730695 A CN 201510730695A CN 105178881 A CN105178881 A CN 105178881A
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- CN
- China
- Prior art keywords
- tee
- ball seat
- joint
- lower contact
- 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 filed of drilling and production of oil fields and oil wells, and particularly to an oil tube test joint. The oil tube test joint comprises a lower joint, an upper joint, a tee, a sphere and a pin. The lower portion of the upper joint is connected to the upper portion of the lower joint, the middle portion of the lower joint is connected to the tee via the pin, the internal periphery of the inner side of the middle portion of the lower joint is provided with a liquid inlet groove the internal diameter of the lower joint above the liquid inlet groove is less than the internal diameter of the lower joint under the liquid inlet groove, the external diameter of the tee is equal to the internal diameter of the lower joint above the liquid inlet groove, the internal periphery and the upper portion of the tee are coated with anticorrosion layers, and the sphere cooperates with the tee. The sphere and tee of the oil tube test joint are made from degradable material, and the internal periphery of the tee is coated with an anticorrosion layer, the sphere and the tee fall at the same time only after the sphere is inserted and the pin is cut short, liquid in a well enters from a side of the tee, the sphere and the tee can degrade in the liquid in the well. subsequent salvage is needless, the operation is simple.
Description
Technical field
The present invention relates to oilfield drilling and production technology field, particularly relate to a kind of coiled tubing test 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.
As slip-type packer: because of slip-type packer by put and put tubing string, conversion slips track back seat card forms fulcrum, utilize release tubing string suspending weight compression packing element setting, but this kind of packer is not suitable for verifying that leakage points is constructed apart from the position that well head is more shallow and darker, during shallow-layer construction, because tubing string suspending weight deficiency causes setting bad, because of slips contrail difficulty during deep layer construction, cause setting difficulty.Particularly in horizontal well and high angle hole, the problems referred to above are particularly outstanding.
Fluid pressure type and inflatable packer: must can ensure that it is setting when keeping the large and casing pressure of tubing pressure when constructing.Test cover construction to terminate, when above extracting tubing string, the liquid in oil pipe must take ground out of, makes troubles to construction operation.
Packer in where no matter using, all needs to seal bottom oil pipe, and packer so just can be made to produce pressure and carry out packing, traditional joint needs the later stage to reclaim, and salvages loaded down with trivial details.
Summary of the invention
The object of the invention is to the deficiency overcoming above-mentioned technology, and provide a kind of coiled tubing test joint, plugging effect is good, reclaims without the need to the later stage.
The present invention for achieving the above object, by the following technical solutions: a kind of coiled tubing test joint, comprise lower contact, top connection, ball seat, spheroid and pin, the bottom of described top connection is connected with the top of described lower contact, the middle part of described lower contact is connected with described ball seat by described pin, the inside middle portion ring week of described lower contact is provided with lead channel, the internal diameter of the lower contact on described lead channel top is less than the internal diameter of lead channel bottom, the external diameter of described ball seat is identical with the internal diameter of the lower contact on described lead channel top, inner circumference and the top of described ball seat are coated with corrosion-inhibiting coating, described spheroid coordinates with described ball seat.When spheroid drops into well, be in sealing state, when pressure continues to increase, pin is cut short, and spheroid and ball seat together fall, and upper and lower joint is connected.In the present invention because spheroid and ball seat are degradation material and around scribble corrosion-inhibiting coating in ball seat, like this, under normal circumstances, ball seat can not be corroded, after only having spheroid to drop into, after pin is cut short, spheroid and ball seat together fall, well liquid enters from ball seat side, and spheroid and ball seat are exposed in well liquid and degrade.Without the need to follow-up salvage, simple to operate.
Preferably, sealing ring is provided with between described ball seat and described lower contact.Improve the sealing of ball seat and lower contact, prevent from leaking gas during work.
Preferably, the upper cross section of described ball seat is horn-like.Realize perfect sealing.
The invention has the beneficial effects as follows: relative to prior art, when spheroid drops into well, be in sealing state, when pressure continues to increase, pin is cut short, and spheroid and ball seat together fall, and upper and lower joint is connected.In the present invention because spheroid and ball seat are degradation material and around scribble corrosion-inhibiting coating in ball seat, like this, under normal circumstances, ball seat can not be corroded, after only having spheroid to drop into, after pin is cut short, spheroid and ball seat together fall, well liquid enters from ball seat side, and spheroid and ball seat are exposed in well liquid and degrade.Without the need to follow-up salvage, simple to operate.
Accompanying drawing explanation
Fig. 1 is sealing state schematic diagram in the present invention;
Fig. 2 is connected state schematic diagram in the present invention;
Fig. 3 is the rear view of degraded 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 coiled tubing test joint, comprise lower contact 1, top connection 2, ball seat 3, spheroid 4 and pin 5, the bottom of described top connection is connected with the top of described lower contact, the middle part of described lower contact is connected with described ball seat by described pin, the inside middle portion ring week of described lower contact is provided with lead channel 6, the internal diameter of the lower contact on described lead channel top is less than the internal diameter of lead channel bottom, the external diameter of described ball seat is identical with the internal diameter of the lower contact on described lead channel top, inner circumference and the top of described ball seat are coated with corrosion-inhibiting coating, described spheroid coordinates with described ball seat.When spheroid drops into well, be in sealing state, when pressure continues to increase, pin is cut short, and spheroid and ball seat together fall, and upper and lower joint is connected.In the present invention because spheroid and ball seat are degradation material and around scribble corrosion-inhibiting coating in ball seat, like this, under normal circumstances, ball seat can not be corroded, after only having spheroid to drop into, after pin is cut short, spheroid and ball seat together fall, well liquid enters from ball seat side, and spheroid and ball seat are exposed in well liquid and degrade.Without the need to follow-up salvage, simple to operate.
Sealing ring is provided with between described ball seat and described lower contact.Improve the sealing of ball seat and lower contact, prevent from leaking gas during work.The upper cross section of described ball seat is horn-like.Realize perfect sealing.
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 (3)
1. a coiled tubing test joint, it is characterized in that: comprise lower contact, top connection, ball seat, spheroid and pin, the bottom of described top connection is connected with the top of described lower contact, the middle part of described lower contact is connected with described ball seat by described pin, the inside middle portion ring week of described lower contact is provided with lead channel, the internal diameter of the lower contact on described lead channel top is less than the internal diameter of lead channel bottom, the external diameter of described ball seat is identical with the internal diameter of the lower contact on described lead channel top, inner circumference and the top of described ball seat are coated with corrosion-inhibiting coating, described spheroid coordinates with described ball seat.
2. coiled tubing test joint according to claim 1, is characterized in that: be provided with sealing ring between described ball seat and described lower contact.
3. coiled tubing test joint according to claim 2, is characterized in that: the upper cross section of described ball seat is horn-like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510730695.3A CN105178881A (en) | 2015-10-30 | 2015-10-30 | Oil tube test joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510730695.3A CN105178881A (en) | 2015-10-30 | 2015-10-30 | Oil tube test joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105178881A true CN105178881A (en) | 2015-12-23 |
Family
ID=54901239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510730695.3A Pending CN105178881A (en) | 2015-10-30 | 2015-10-30 | Oil tube test joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105178881A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209317A (en) * | 2017-07-04 | 2019-01-15 | 中国石油化工股份有限公司 | A kind of pressure break pipe nipple and the fracturing string comprising it |
| CN109209318A (en) * | 2017-07-04 | 2019-01-15 | 中国石油化工股份有限公司 | A kind of fracturing sliding bush and the fracturing string comprising it |
| CN109209319A (en) * | 2017-07-04 | 2019-01-15 | 中国石油化工股份有限公司 | A kind of fracturing sliding bush and the fracturing string comprising it |
-
2015
- 2015-10-30 CN CN201510730695.3A patent/CN105178881A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209317A (en) * | 2017-07-04 | 2019-01-15 | 中国石油化工股份有限公司 | A kind of pressure break pipe nipple and the fracturing string comprising it |
| CN109209318A (en) * | 2017-07-04 | 2019-01-15 | 中国石油化工股份有限公司 | A kind of fracturing sliding bush and the fracturing string comprising it |
| CN109209319A (en) * | 2017-07-04 | 2019-01-15 | 中国石油化工股份有限公司 | A kind of fracturing sliding bush and the fracturing string comprising it |
| CN109209317B (en) * | 2017-07-04 | 2021-02-26 | 中国石油化工股份有限公司 | Fracturing nipple and fracturing pipe string comprising same |
| CN109209318B (en) * | 2017-07-04 | 2021-09-10 | 中国石油化工股份有限公司 | Fracturing sliding sleeve and fracturing pipe string comprising same |
| CN109209319B (en) * | 2017-07-04 | 2021-09-10 | 中国石油化工股份有限公司 | Fracturing sliding sleeve and fracturing pipe string comprising same |
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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: 20151223 |
|
| WD01 | Invention patent application deemed withdrawn after publication |