CN205206783U - Abrupt structure is prevented to packer packing element - Google Patents
Abrupt structure is prevented to packer packing element Download PDFInfo
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- CN205206783U CN205206783U CN201521054702.4U CN201521054702U CN205206783U CN 205206783 U CN205206783 U CN 205206783U CN 201521054702 U CN201521054702 U CN 201521054702U CN 205206783 U CN205206783 U CN 205206783U
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- lug structure
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Abstract
The utility model provides a packer packing element prevent abrupt structure, including spiral extension spring (1) and ring type filling (2), ring type filling (2) are filled up in proper order by a plurality of packing fritters and are constituted in spiral extension spring (1) hole space, it is inflection cranked circular arc stick fritter to fill the fritter, then will spiral extension spring (1) head and the tail end welds, forms a complete ring, just can wholly process an abrupt structure is prevented to packer packing element of compression packing element shoulder. The utility model discloses compression packer packing element can be satisfied and highly compressed demand is born at higher warm purgation, under the condition that the sizing material performance is the same of packing element, the bearing capacity of improvement packing element that can be by a wide margin, simple structure, safe and reliable, low cost. Through the test, under 204 DEG C of temperature, the bearing capacity is increased to 80MPa from the highest 25MPa originally, improves working life and improves to about 3 years from 4~5 hours.
Description
Technical field
The utility model belongs to petroleum drilling and mining technical field, relates to the packer in formation testing, is specifically related to the anti-lug structure of a kind of packing element.
Background technology
In formation testing, testing equipment is connected by drilling rod or oil pipe to be transferred in well, in test process, by the operation on ground, these equipment can drive a well or closing well, and various pressure, the temperature data in each period on stratum is obtained by switch well surveying, fluid sample can also be taken out simultaneously, by the data such as fluid type, character and oil-gas ratio can be obtained to the analysis of sample, and in-place permeability and other characteristics can be estimated, for the formation production in later stage is submitted necessary information according to data such as pressure, flow velocity and liquid viscosities.Formation test tool comprises circle core shaft expansion joint, circulating valve, bumper jar, testing valve, safety joint, packer, manometer, the parts such as perforating gun.Complete test, first the producing zone of underground must be separated, and the instrument completing this function is exactly packer.
Packer has elastic sealing elements, and the annular space between the tubing string of packing various sizes whereby and well and between tubing string and tubing string, isolated payzone, to control product fluid or to inject liquid, protective casing.
Packer is used for annular space between packing tubing string and well, isolated payzone elastic sealing elements be exactly packing element.Packing element is as the core component of packer, and its quality directly affects result of use and the life-span of packer.Along with the increase of oil well depth, the heat resisting and pressure resisting performance requirement of packing element also improves thereupon.And packing element in the market in use often there will be also not to the sealing load required, the situation that its shoulder is just torn, final mistake is sealed and causes test crash.
Some structures are increased at shoulder, such as gauze wire cloth or easily by the copper ring structure of compressive strain during present some packing elements design.Permanent deformation is there is in these gauze wire cloths or copper ring structure after by compression, fill the annular space between sleeve pipe and instrument completely, but setting after pressure is cancelled and can not rebound, the danger that there will be bit freezing is easy to like this when pulling out of hole, or packing element to be destroyed could pull out of hole in trip-out process, after packing element destroys, pulling out of hole also can be risky, which also limits the scope of application of this structure packing element.
Also has a kind of structure of packing element, an annular spiral stretching spring is increased at shoulder, the inside of spring overlaps an annular spiral stretching spring again, but this structure is when packing element shoulder is subject to large extruding, because the gap that spring inner is very large, often spring squeezed flat or disconnect from certain position, cause packing element bearing capacity inadequate, cause test crash, the annular space that the spring sometimes squeezed off even can be snapped to sleeve pipe and top footwear goes, and causes security incident.
Utility model content
The purpose of this utility model is to provide a kind of packing element preventing shoulder parts lug structure that can bear compared with strong pressure; can along with the annular space applying setting force and Sealed casing pipe and Tool Room; along with pressure spot is cancelled and automatic rebounding; thus not only play a protective role; can also recover, to ensure that work progress is safe and reliable before playing well.
For realizing above-mentioned functions, the concrete technical scheme of design packing element protrusion-dispelling new construction is:
The anti-lug structure of packing element, comprises the spiral stretching spring (1) being assemblied in packing element shoulder, it is characterized in that: also comprise the ring type filling (2) being filled in described spiral stretching spring (1) pore space.
Further, described ring type filling (2) is filled in spiral stretching spring (1) pore space successively by multiple filling fritter and forms.
Further, described filling fritter is interior bending circular arc rod fritter, and its diameter is consistent with described spiral stretching spring (1) interior diameter, is 2 × R1; Its outer arc radius is its diameter and described ring type filling (2) inner arc radius (R2) sum.
Further, described ring type filling (2) is filled by 25 ~ 70 described filling fritters and is formed.
Further, described filling fritter diameter is 3 ~ 25mm, and inner arc radius (R2) is 40 ~ 380mm.
Further, described filling small pieces of material is make with withstand voltage metal or nonmetal round bar.
Further, the material of described filling fritter is Q235 or polyimides.
Further, described spiral stretching spring (1) be loaded by described ring type filling (2) full after, two ends are welded, and form a complete annulus.
Further, before packing element is shaping, this anti-lug structure to be placed in mould the overall sulfidization molding with packing element.
Advantageous Effects of the present utility model, compared with prior art, has the following advantages:
1, structure is simple, and dependable performance, can prevent packing element from tearing from shoulder.Have the packing rubber sleeve test of this anti-lug structure in 400 experiments, there is the situation of packing element shoulder camber of spring or fracture in none example, and after test, packing element is intact, achieves the recycling of packing rubber sleeve.Therefore, packing element performance and reliability significantly improve.
2, packing element bearing capacity and significantly improve application life.The packing element of this structure is under the high temperature of 204 DEG C, and bearing capacity is increased to 80MPa from the highest original 25MPa, and working life was increased to about 3 years from 4 ~ 5 hours.
3, transform easy to process, distinguish very little with original packing element processing mold, only need improve a little and just can produce, shorten the product up-gradation cycle, increase economic benefit.
4, significantly reduce costs.The single-piece packing rubber sleeve cost of the utility model structure only increases about 100 yuan, if produce in enormous quantities reduction about 70%, functional performance but significantly improves, and therefore has significant economic benefit.
Accompanying drawing explanation
Fig. 1 is the spiral stretching spring schematic diagram before the utility model processing.
Fig. 2 is filling fritter elevation of the present utility model.
Fig. 3 is filling fritter schematic cross-section of the present utility model.
Fig. 4 is schematic diagram of the present utility model.
Fig. 5 is the schematic diagram that the utility model is installed on packing element.
In figure, half warp, R2--ring type filling inside radius, R3--ring type filling outer radius in 1-spiral stretching spring, 2--ring type filling, R1--spring.
Detailed description of the invention
Embodiment of the present utility model is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, be the spiral stretching spring schematic diagram before the utility model processing.Spiral stretching spring is intercepted certain length, two of spring silk is carried out repairing stranding, just in time can connect into a complete annulus from beginning to end.The inner radial of this spiral stretching spring is R1, and diameter is then 2 × R1.
As shown in Figure 2 to 3, be filling fritter elevation of the present utility model and schematic cross-section.Filling fritter is interior bending circular arc rod fritter, and its diameter is consistent with spring 1 interior diameter or mate.Its outer arc radius is its diameter and ring type filling 2 inner arc radius R 2 sum, and consistent with ring type filling 2 outer arc radius R 3, i.e. R3=2 × R1+R2.
As shown in Figure 4, be assembly schematic diagram of the present utility model.Comprise spring 1, ring type filling 2, by the filling fritter matched with spring 1 size, fill one by one successively in spring 1 with suitable quantity, under frock is fixing, the two ends of spring 1 is moved to together and welds.
As shown in Figure 5, be schematic diagram that the utility model is installed on packing element.Before packing element is shaping, this structure is placed in mould, shaping together with packing element, finally machine packing element.
Specifically, according to the model needs of packing element, by one section of appropriate length, it is the circle of 40 ~ 380mm that the round metal bars of diameter to be R1 be 3 ~ 25mm curves a complete inside radius R2, and then Precision Machining is divided into 25 ~ 70 circular arc fritters or circular arc segment.
This circular arc fritter is the annulus of R2 according to forming again a complete inside radius after the arrangement of end to end order, namely forms ring type filling 2.This round metal bars material also can be replaced by the withstand voltage nonmetals with sufficient intensity.The preferred Q235 of metal material, if not metal material then preferred polyimides.
Ring type filling 2 is contained in spiral stretching spring 1, fill the whole pore space of full spring 1, then its two ends are welded by spring 1 after installing 25 ~ 70 filling fritters, form a complete main assemblage of spring (as shown in Figure 4), be namely fixed on the anti-lug structure of a kind of packing element of compression type glue barrel shoulder.
And when reality uses; packing element is according to method installation as shown in Figure 5; when packing element is compressed; will outwards expand, spring will be softened and cling on internal surface of sleeve pipe, due to the supporting role of ring type filling 2; ring type filling 2 in spring 1 can be protected packing element shoulder can not be pressed against in the gap of top footwear and sleeve pipe and go; spring 1 also can not be crushed, thus guarantees that the shoulder of packing element can not damage, and then improves the bearing capacity of packing element.
Setting after pressure cancels, packing element starts resilience, and spring also can follow resilience, and size will return in the scope of the safety required by well, can ensure that testing tool safety plays well smoothly.
Take single-piece packing rubber sleeve cost of the present utility model only to increase about 100 yuan, then can drop to about 70% in batch production, functional performance then promotes at double.After tested, under 204 DEG C of high temperature, bearing capacity is increased to 80MPa from the highest original 25MPa, improves working life and is increased to about 3 years from 4 ~ 5 hours.In 400 experiments, there is the accident of packing element shoulder camber of spring or fracture in none example.
Claims (8)
1. the anti-lug structure of packing element, comprises the spiral stretching spring (1) being assemblied in packing element shoulder, it is characterized in that: also comprise the ring type filling (2) being filled in described spiral stretching spring (1) pore space.
2. the anti-lug structure of packing element as claimed in claim 1, is characterized in that: described ring type filling (2) is filled in spiral stretching spring (1) pore space successively by multiple filling fritter and forms.
3. the anti-lug structure of packing element as claimed in claim 2, is characterized in that: described filling fritter is interior bending circular arc rod fritter, and its diameter is consistent with described spiral stretching spring (1) interior diameter; Its outer arc radius is its diameter and described ring type filling (2) inner arc radius (R2) sum.
4. the anti-lug structure of packing element as claimed in claim 2 or claim 3, is characterized in that: described ring type filling (2) is filled by 25 ~ 70 described filling fritters and formed.
5. the anti-lug structure of packing element as claimed in claim 4, is characterized in that: described filling fritter diameter is 3 ~ 25mm, and inner arc radius (R2) is 40 ~ 380mm.
6. the anti-lug structure of packing element as described in claim 2,3 or 5, is characterized in that: described filling small pieces of material is that withstand voltage metal or nonmetal round bar are made.
7. the anti-lug structure of packing element as claimed in claim 6, is characterized in that: the material of described filling fritter is Q235 or polyimides.
8. the anti-lug structure of packing element as claimed in claim 1, is characterized in that: described spiral stretching spring (1) be loaded by described ring type filling (2) full after, two ends are welded, and form a complete annulus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521054702.4U CN205206783U (en) | 2015-12-18 | 2015-12-18 | Abrupt structure is prevented to packer packing element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521054702.4U CN205206783U (en) | 2015-12-18 | 2015-12-18 | Abrupt structure is prevented to packer packing element |
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| Publication Number | Publication Date |
|---|---|
| CN205206783U true CN205206783U (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521054702.4U Active CN205206783U (en) | 2015-12-18 | 2015-12-18 | Abrupt structure is prevented to packer packing element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401913A (en) * | 2015-12-18 | 2016-03-16 | 宝鸡市元亨石油设备有限责任公司 | Packer rubber sleeve outburst prevention structure |
-
2015
- 2015-12-18 CN CN201521054702.4U patent/CN205206783U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401913A (en) * | 2015-12-18 | 2016-03-16 | 宝鸡市元亨石油设备有限责任公司 | Packer rubber sleeve outburst prevention structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |