CN103105271A - Upper-lower differential pressure test method for packer - Google Patents
Upper-lower differential pressure test method for packer Download PDFInfo
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- CN103105271A CN103105271A CN 201110370185 CN201110370185A CN103105271A CN 103105271 A CN103105271 A CN 103105271A CN 201110370185 CN201110370185 CN 201110370185 CN 201110370185 A CN201110370185 A CN 201110370185A CN 103105271 A CN103105271 A CN 103105271A
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Abstract
The invention discloses an upper-lower differential pressure test method for a packer. The upper-lower differential pressure test method for the packer includes the following steps: (a) continually pressurizing after the packer is set, enabling the packer to be with stable rated working pressure, and closing a medium-pressure control valve; (b) opening an upper-pressure control valve, pressurizing an upper oil jacket annulus of a rubber sleeve of the packer to reach a set working pressure, stabilizing pressure for a certain time, and achieving qualification if the pressure of an upper-pressure gage and a middle-pressure gage do not drop; and (c) setting the packer, opening a lower-pressure control valve, pressurizing a lower oil jacket annulus of the rubber sleeve of the packer, stabilizing the pressure for a certain time, and achieving qualification if the pressure of the middle-pressure gage and a lower-pressure gage do not drop, proving that quality of the packer is qualified and the downhole working demand is satisfied, otherwise, proving that the upper oil jacket annulus and the lower oil jacket annulus are not totally sealed by the rubber sleeve. According to the upper-lower differential pressure test method for the packer, through the simulation of downhole working states of the packer, upper-lower differential pressure of the packer is tested, and factory use quality of the packer is guaranteed.
Description
Technical field
The present invention relates to a kind of pressure difference test method up and down for packer.
Background technology
At home and abroad in crude production, production on artificial lift has occupied space of top prominence, and in production on artificial lift take oil well pump as main.Oil well pump is the most basic, the most reliable a kind of, usable range pumping tool the most widely.According to statistics, shared ratio is more than 90% in mechanical oil well for oil well pump, and oil well pump equipment plays vital effect to whole crude production, due to oil rig particularly the economic loss that causes of the fault of downhole hardware be extremely huge.Therefore, in time and the working condition of monitor and judgement oil well pump, and the fault that occurs is processed effectively and timely, not only can greatly be reduced the production cost of crude oil, obtain higher economic benefit, and will help further to improve the level of scientific management in oil field.
The most manual work that rely on of traditional oil pumping well detection and diagnosis mode are completed, and namely by patrolling the mode of well, then the manual critical data that gathers oil well work is passed through to calculate, or rule of thumb judged the working condition of oil well.This mode obviously can't satisfy the active demand of oil field development.Current, the collection of well data, detection and diagnosis have become the major reform target that realizes that digitizing oil field " cost efficiency " raises the management level, by setting up the field produces monitoring diagnosis system, realize the real-time analysis transmission of well on the beam data and the seamless link of information network, progressively form the information network of producing control integration, become the ideal solution of oilfield well network monitoring and Production scheduling management.
Subsurface tool is that oilfield enterprise has bored workover treatment and carries out smoothly one of important guarantee.The subsurface tool management of field produces enterprise has its uniqueness: the production operation circumstance complication is changeable, and the behaviour in service of subsurface tool also is among continuous variation, and effective enforcement of having bored workover treatment depends on subsurface tool and is in good working order; The subsurface tool kind is many, it is wide to distribute, and a large amount of mobile subsurface tools is wherein arranged, the containing much information of management; The subsurface tool value ratio is more expensive, help enterprise to carry out detection and the reparation of subsurface tool, change the present situation that in the past only detected by artificial experience, strengthen to greatest extent subsurface tool in the information system management of field produces enterprises, improve the subsurface tool service efficiency, can bring direct economic benefit for enterprise.
Subsurface tool is the down-hole process pipe string important component part of oil field layered production practice, is divided three classes by function: packer class, control tool class, workover tool class.Zonal injection is exactly in a bite water injection well, utilize packer that multiple zone is divided into some intervals, when adding persistent erection, low-permeability oil-bearing stratum flooding, by adjusting the restriction loss of downhole choke, the high permeability oil reservoir is controlled water filling, enable keeping under the relatively stable water injection pressure of well head, high, medium and low permeability oil reservoir is a technological measure of energy water filling all.
Oil well pump, subsurface tool (packer and water injection allocator) are the nucleus equipments of oil recovery, water filling, and its quality good or not is most important for the normal production of oil-water well.Especially be oil recovery factory's service as one, undertake that oil well pump, subsurface tool detect, the grass-roots unit of repair, improve constantly repair rate, strengthen quality control and guarantee its outgoing qualified be the most important thing of work in every.
During packer uses at the scene, sit deblocking flexibly, reliably, indeformable under the differential pressure action of up and down, the lasting load-bearing capacity of packing element is strong, just can play packing oil jacket annular space and guarantee job execution purpose smoothly, therefore, the set pressure, deblocking pulling force, packing element sealing property of packer are its crucial technical indicators.But owing to lacking necessary pick-up unit, control technological means in the outgoing of packer single, only have one of overall sealing performance test, can not effectively guarantee the outgoing of packer, easily cause the packer rear appearance of going into the well:
(1) seat deblocking very flexible, not setting or deblocking is difficult, affect job execution;
(2) reach not deblocking of predetermined deblocking pulling force packer, pull out of hole by force and cause packing element to damage or the tubing string dropout;
(3) the packing element fatigue resistance is low, and under the effect of high pressure, high temperature, packing element damages or be poorly sealed, causes packer to lose efficacy in the short time.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of pressure difference test method up and down for packer is provided, this test method is checked the pressure reduction up and down of packer by the duty of simulation packer in the down-hole, has guaranteed the service property (quality) of dispatching from the factory of packer.
Purpose of the present invention is achieved through the following technical solutions: be used for the pressure difference test method up and down of packer, comprise the following steps:
(a) after packer set, continue pressurization, make it be stable at rated operating pressure, and close middle pressure-controlled valve;
(b) open the pressure-controlled valve, to packing element top oil jacket applied pressure by annulus to stipulating working pressure, the voltage stabilizing certain hour, upper, that middle tensimeter pressure is not reduced to is qualified;
(c) after packer set, open and press down by-pass valve control, to packing element bottom oil jacket applied pressure by annulus to stipulating working pressure, the voltage stabilizing certain hour, in, that the downforce gauge pressure is not reduced to is qualified, prove that this packer is up-to-standard, can satisfy the underground work needs, otherwise, the tensimeter ANOMALOUS VARIATIONS can appear, three gauge hands fluctuate up and down, after stable, reading is consistent, proves the complete packing of packing element oil jacket annular space up and down, that is: the packer steel part can't bear high pressure distortion or packer leakage, cause tubing and casing to be communicated with, packer lost efficacy.
In described step (a), rated operating pressure is 25MPa.
In described step (b), the voltage stabilizing time is 5min.
In described step (c), the voltage stabilizing time is 3min.
The packer ground simulation test device that is used for above-mentioned test method, mainly by bracing frame, be arranged on the suspender on bracing frame and the packer that is connected with suspender consists of, described packer is arranged in simulation oil well; Also comprise and the inner heating bath that is connected of simulation oil well.
Described suspender mainly by the jack that connects with bracing frame, the weight indicator that connects with jack and the action pressure-testing joint that is connected with weight indicator consist of, described action pressure-testing joint is connected with packer.
Described packer connects by pressure cap and action pressure-testing joint.
Described jack is the 10t jack.
Also be provided with ebullator between described heating bath and simulation oil well.
On described heating bath, thermometer is installed.
In sum, the invention has the beneficial effects as follows: by the duty of simulation packer in the down-hole, check the pressure reduction up and down of packer, guaranteed the service property (quality) of dispatching from the factory of packer.
Description of drawings
Fig. 1 is the structural representation of equipment therefor of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
The pressure difference test method up and down that is used for packer that the present invention relates to comprises the following steps:
(a) after packer set, continue pressurization, make it be stable at rated operating pressure, and close middle pressure-controlled valve;
(b) open the pressure-controlled valve, to packing element top oil jacket applied pressure by annulus to stipulating working pressure, the voltage stabilizing certain hour, upper, that middle tensimeter pressure is not reduced to is qualified;
(c) after packer set, open and press down by-pass valve control, to packing element bottom oil jacket applied pressure by annulus to stipulating working pressure, the voltage stabilizing certain hour, in, that the downforce gauge pressure is not reduced to is qualified, prove that this packer is up-to-standard, can satisfy the underground work needs, otherwise, the tensimeter ANOMALOUS VARIATIONS can appear, three gauge hands fluctuate up and down, after stable, reading is consistent, proves the complete packing of packing element oil jacket annular space up and down, that is: the packer steel part can't bear high pressure distortion or packer leakage, cause tubing and casing to be communicated with, packer lost efficacy.
In described step (a), rated operating pressure is 25MPa.
In described step (b), the voltage stabilizing time is 5min.
In described step (c), the voltage stabilizing time is 3min.
Above-mentioned test method equipment therefor as shown in Figure 1, mainly by bracing frame 1, be arranged on the suspender on bracing frame 1 and the packer 2 that is connected with suspender consists of, described packer 2 is arranged in simulation oil well 3; Also comprise and the inner heating bath 4 that is connected of simulation oil well 3.
Described suspender mainly is made of the jack 5 that is connected with bracing frame 1, the weight indicator 6 that is connected with jack 5 and the action pressure-testing joint 7 that is connected with weight indicator 6, and described action pressure-testing joint 7 is connected with packer 2.
Described packer 2 is connected with action pressure-testing joint 7 by pressure cap 10.
Described jack 5 is the 10t jack.
Also be provided with ebullator 8 between described heating bath 4 and simulation oil well 3.
On described heating bath 4, thermometer 9 is installed.
The above is only preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations that above embodiment is done are within all falling into protection scope of the present invention.
Claims (4)
1. be used for the pressure difference test method up and down of packer, it is characterized in that, comprise the following steps:
(a) after packer set, continue pressurization, make it be stable at rated operating pressure, and close middle pressure-controlled valve;
(b) open the pressure-controlled valve, to packing element top oil jacket applied pressure by annulus to stipulating working pressure, the voltage stabilizing certain hour, upper, that middle tensimeter pressure is not reduced to is qualified;
(c) after packer set, open and press down by-pass valve control, to packing element bottom oil jacket applied pressure by annulus to stipulating working pressure, the voltage stabilizing certain hour, in, that the downforce gauge pressure is not reduced to is qualified, prove that this packer is up-to-standard, can satisfy the underground work needs, otherwise, the tensimeter ANOMALOUS VARIATIONS can appear, three gauge hands fluctuate up and down, after stable, reading is consistent, proves the complete packing of packing element oil jacket annular space up and down, that is: the packer steel part can't bear high pressure distortion or packer leakage, cause tubing and casing to be communicated with, packer lost efficacy.
2. test method according to claim 1, is characterized in that, in described step (a), rated operating pressure is 25MPa.
3. test method according to claim 1, is characterized in that, in described step (b), the voltage stabilizing time is 5min.
4. test method according to claim 1, is characterized in that, in described step (c), the voltage stabilizing time is 3min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110370185 CN103105271A (en) | 2011-11-10 | 2011-11-10 | Upper-lower differential pressure test method for packer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110370185 CN103105271A (en) | 2011-11-10 | 2011-11-10 | Upper-lower differential pressure test method for packer |
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| CN103105271A true CN103105271A (en) | 2013-05-15 |
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| CN 201110370185 Pending CN103105271A (en) | 2011-11-10 | 2011-11-10 | Upper-lower differential pressure test method for packer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389282A (en) * | 2017-07-19 | 2017-11-24 | 青岛中瑞泰软控科技股份有限公司 | A kind of gas pressure test method and pilot system |
| CN108225687A (en) * | 2017-12-11 | 2018-06-29 | 中盐金坛盐化有限责任公司 | A kind of detection method of salt hole air reserved storeroom packer setting effect |
| CN111042760A (en) * | 2018-10-11 | 2020-04-21 | 中国石油化工股份有限公司 | Seal testing device and method for underground packer of intelligent measurement and control water injection well |
| CN113820107A (en) * | 2020-06-12 | 2021-12-21 | 中国石油化工股份有限公司 | Performance testing method for expandable packer and pipe string |
-
2011
- 2011-11-10 CN CN 201110370185 patent/CN103105271A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389282A (en) * | 2017-07-19 | 2017-11-24 | 青岛中瑞泰软控科技股份有限公司 | A kind of gas pressure test method and pilot system |
| CN107389282B (en) * | 2017-07-19 | 2023-09-08 | 青岛中瑞泰软控科技股份有限公司 | Air seal test method and test system |
| CN108225687A (en) * | 2017-12-11 | 2018-06-29 | 中盐金坛盐化有限责任公司 | A kind of detection method of salt hole air reserved storeroom packer setting effect |
| CN111042760A (en) * | 2018-10-11 | 2020-04-21 | 中国石油化工股份有限公司 | Seal testing device and method for underground packer of intelligent measurement and control water injection well |
| CN113820107A (en) * | 2020-06-12 | 2021-12-21 | 中国石油化工股份有限公司 | Performance testing method for expandable packer and pipe string |
| CN113820107B (en) * | 2020-06-12 | 2024-05-07 | 中国石油化工股份有限公司 | Performance test method and string for expanding packer |
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Application publication date: 20130515 |