CN202611649U - Pressure return type well opening movable sealing device capable of running with pressure - Google Patents
Pressure return type well opening movable sealing device capable of running with pressure Download PDFInfo
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- CN202611649U CN202611649U CN 201220021604 CN201220021604U CN202611649U CN 202611649 U CN202611649 U CN 202611649U CN 201220021604 CN201220021604 CN 201220021604 CN 201220021604 U CN201220021604 U CN 201220021604U CN 202611649 U CN202611649 U CN 202611649U
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- sealing device
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Abstract
The utility model discloses a pressure return type well opening movable sealing device capable of running with pressure. The device comprises a through hole upper slide and a through hole lower slide for a cable to penetrate, a sealing grease pressure cabin arranged on one side of the through hole upper slide and the through hole lower slide, a transition channel arranged between the through hole upper slide and the through hole lower slide, a well pressure connection pipe sleeved outside the through hole lower slide and a guide pipe. One end of the guide pipe is connected with the well pressure connection pipe, and the other end of the guide pipe is connected with the sealing grease pressure cabin. The pressure return type well opening movable sealing device is simple in structure and high in reliability, facilitates underground data collection, improves working efficiency and reduces cost.
Description
Technical field
The utility model relates to a kind of Operating Pressure back pressure formula well head dynamic sealing device.
Background technology
Down-hole electronic thermometer and electronic pressure gauge are generally adopted in the formation testing test of domestic oil field, obtain bottom hole flowing pressure, static pressure, barometric gradient, pressure build-up curve, drop of pressure curve and technical data such as temperature curve, interference and Well Test Curve.Accomplishing the technology of downhole parameters direct reading test at present, all is to adopt armored cable connection collector and weight linear meter band pressure to rely on gravity to sink to the down-hole to implement test.Armored cable is to have installed a circle steel wire sheath additional in the cable periphery, and main effect is tension strength and the abrasion resistance in order to strengthen cable.The diameter of the armored cable that now uses is 5.56mm; Weight is about 150kg/1000m; Ignore down-hole weight linear meter length gradient pressure that produces and the buoyancy that the weight linear meter volume produces and disregard, because the cable that connects collector and weight linear meter is outside well, the axial pressure of cable along the line is zero; Make cable and collector junction pressure disappearance and produced pressure reduction; So collector and weight linear meter sink must overcome the buoyancy that pressure reduction causes, the basal area of armored cable causes the pressure reduction of collector and weight linear meter to equal cable basal area * pressure (cable diameter * 3.14 * pressure), is 5.56mm by cable diameter; Pressure is that 10MPa calculates, and the buoyancy that is produced is 28.26kg.When if the pressure at down-hole measuring point place is 60MPa, buoyancy is 169.56kg, so counterweight must just can make collector sink greater than 170kg.The diameter of weight linear meter generally can not surpass diameter 36mm on request, and the proportion of weight material is generally 11～15, and the length of weight linear meter will be about 17 meters～13 meters so.The practical implementation method of oil well formation testing test Operating Pressure is: cable is connected collector in elder generation and weight linear meter is encased in the lubricator of production tree top sealing; And then open production tree oil well valve passage; Let the collector and the weight linear meter of suspention crash in the well; Through winch cable and sealing chute, rely on gravity that collector is put into the oil well shaft bottom.If weight linear meter length is 15 meters; The lubricator length of Operating Pressure just is greater than 15 meters so; The open-air completion presses 15 meters long weight linear meters into the such job engineering in shaft bottom from the high lubricator band of erectting more than 15 meters, must multiple main equipment (cable car, generator, crane, high-pressure pump and equipment are transported car) and a large amount of engineering staff cooperate and could ensure enforcement.The construction operation in the desert region of remoteness, its engineering cost is very high, and the site operation personnel is dangerous and labour intensity is big, so generally seldom use in the reality.In most cases, all be to adopt the steel wire of diameter 3mm to hitch to store in the down-hole after collector is put into the shaft bottom image data earlier in the reality, treat that pressure gauge and thermometer proposition ground is handled to obtain downhole data again.The data that the method obtains lag behind, and are easy to miss the chance of obtaining achievement, and need frequent in oil well, removing, and it is many to employ train number, and operating efficiency is very low, can not satisfy the actual demand on the modern production.Obviously, this technology is not suitable for the test of horizontal well.
This shows that causing the heavy main cause with a large amount of expenses of generation of downhole parameters direct access mode test jobs engineering is diameter and weight into the well cable.In downhole parameters direct reading test technology, the effect first load-bearing of cable is wanted to bear several kms and is gone into the deadweight of well cable and the weight of collector and weight linear meter.When carrying on the cable, cable also will bear well head sealing chute frictional resistance and down-hole fluid and cable and weight linear meter and produce the resistance that friction causes cable; Its two be the power supply, working power is provided for the down-hole collector; It three is communication, signalling channel is provided for down-hole collector and GDHS.The deadweight of cable is a principal element in the factor of cable load-bearing, because the weight of weight linear meter can reduce through reducing the line footpath significantly; Well head seal friction power can reduce through adding packing grease; Fluid can reduce through the control upward strain speed the frictional force of down-hole cable and weight linear meter; How developing thus and can sustain several times of cables to five km cables deadweights, is the key of the simple and easy to do downhole parameters direct-reading all-in-one of development.Next is the long-range direct current supply and the communication technology; Secondly be again into well cable well head slipper seal technology; Horizontal well down-hole crawl device carries cable and passes horizontal pipeline section technology besides.
At home in the oil field formation testing test; In most cases be to adopt steel wire to connect collector and weight linear meter; Rely on gravity collector to be sent into the down-hole, store in the down-hole after the image data, treat that pressure gauge and thermometer propose ground and handle the acquisition downhole data again through the well head slipper seal.The shortcoming of this method is to obtain the hysteresis data, misses the chance of obtaining achievement easily, needs frequent rising to obtain needed data; Employ construction team and vehicle arrangement operation often; The accumulative total expense is high, and operating efficiency is very low, can not adapt to China oil field and bring in a well in a large number every year; Particularly the operation of horizontal well increases year by year, to the increasingly high actual needs that requires of testing efficiency.Obviously, this method can not be inserted collector the shaft bottom of horizontal well, so can not be used for the test of horizontal well.
When the hole condition conditions permit, formation testing test also can be adopted an electronic pressure gauge and thermometer to link to each other with the communications cable to carry out real-time wired direct-reading collecting test at the bottom of the lower going-into-well.The practical implementation method is to connect electron temperature and pressure acquisition device and weight linear meter to the cable of making sheath with many wire rope; Utilize gravity to pass through well head sliding sealing device and the stifled cable deformation gap of high-pressure pump injection stop-leak compound benefit; Band is pressed collector is sent into the down-hole, accomplishes thus and obtains the test data that gather the down-hole in real time.But existing this method of testing; The problem that has several aspects technically: first cable can not be meticulous; In order enough electric energy and guarantee its communication ability to be provided for the down-hole collector; The communications cable is at least two cores and can not be meticulous, and the meticulous line loss of lead long-range transmission of electric energy of excessive several kms and transfer of data just are difficult to realize technically.The meticulous pulling force that it bears of cable is just big inadequately, just can not sustain the gravity of a few km cables and collector and weight linear meter; It two is that cable can not be thick excessively, and cable is thick under high pressure deformation can to take place, and when the cable band that connects the electronics collector is pressed into well, adopts the via hole slipper seal just to be difficult to realize high pressure sealing; It three is that counterweight is wanted suitably, and basal area that cable is thick is just big, under down-hole high pressure; The basal area of cable can cause a rising buoyancy to down-hole collector and weight linear meter, and the bigger buoyancy that is under high pressure produced in line footpath is big more, and line footpath one regularly; Collector is sunk just must strengthen counterweight; Will increase the volume of weight linear meter and the bearing capacity of cable and strengthen counterweight, so just need increase cable pull again, just can only increase the line footpath when material is confirmed.This shows, adopt wired direct reading test mode, cable is crossed and slightly or meticulous is all had problems.In the actual Test Application in oil field, the cable footpath that wired direct reading test engineering is used is about 5mm～6mm at present, and outer is the many sheaths that the steel wire stranding is processed; Because of cable diameter is bigger, counterweight is generally all more than 100 kilograms, and this test mode is because the site operation operation is very complicated; Receive hole condition restriction (well presses big more counterweight big more, and the down-hole collector is difficult to), engineering cost is very high; The site operation personnel is dangerous and labour intensity is big, and operating efficiency is low, can only obtain the hysteresis data in addition; Miss the chance of obtaining achievement easily, need frequent rising to obtain needed data, employ construction team and vehicle arrangement operation often; The accumulative total expense is high, and operating efficiency is very low, can not adapt to China oil field and bring in a well in a large number every year; Particularly the operation of horizontal well increases year by year, to testing efficiency require increasingly high.
Summary of the invention
The utility model purpose is: a kind of Operating Pressure back pressure formula well head dynamic sealing device is provided.
In order to solve the problems of the technologies described above; The technical scheme of the utility model is following: a kind of Operating Pressure back pressure formula well head dynamic sealing device, it comprises: allow the upper and lower slideway of via hole, the stop-leak compound pressure storehouse that is arranged on upper and lower slideway one side of via hole that cable passes, be arranged on the transition passage between the upper and lower slideway of via hole, the well aluminium hydraulic pressed connecting pipe that is set in the via hole glide path outside and an end link to each other with the well aluminium hydraulic pressed connecting pipe other end then with the conduit in stop-leak compound pressure storehouse.
On the basis of technique scheme, further comprise following attached technical scheme:
Said stop-leak compound pressure storehouse comprises the container cavity of accommodating stop-leak compound, be used to add the warehouse entry mouth of stop-leak compound and can be in container cavity movable and by the conduit feedback and amplify the piston that well is pressed.
Said transition passage is provided with the adapter cavity that is connected with container cavity, and piston to be tail end big and head end is little.
It comprises that further the counterweight that links to each other with the well aluminium hydraulic pressed connecting pipe prolongs pipe.
The utility model advantage is:
The utility model is simple in structure, and reliability is higher, and is convenient to the downhole data collection, and increasing work efficiency reduces cost.
Description of drawings
Fig. 1 is used for the sketch map of downhole data acquisition system for the utility model;
Fig. 2 is the internal construction sketch map of the utility model;
Fig. 3 is the decomposing schematic representation of the utility model.
The specific embodiment
Embodiment: shown in Fig. 1-3; It is the specific embodiment of a kind of Operating Pressure back pressure formula well head dynamic sealing device of the utility model; It is used for the downhole data acquisition system, and this downhole data acquisition system comprises collector 20, the Operating Pressure back pressure formula well head dynamic sealing device 30 that is arranged on well head 1 top that cable 10, an end link to each other with cable 10, be positioned at the well casing of Operating Pressure back pressure formula well head dynamic sealing device 30 belows, link to each other with the other end of cable 10 and be positioned at automatic control winch 40 and the controller 50 of wireless remote control automatic control winch 40 on the bottom surface.
Operating Pressure back pressure formula well head dynamic sealing device 30 comprises the upper and lower slideway of the via hole that allows cable 10 to pass 31,32, be arranged on the stop-leak compound pressure storehouse 33 of upper and lower slideway 31,32 1 sides of via hole, be arranged on the upper and lower slideway of via hole 31, the transition passage between 32 34, the well aluminium hydraulic pressed connecting pipe 35 that is set in via hole glide path 32 outsides, an end link to each other with well aluminium hydraulic pressed connecting pipe 35, and the other end then manages 37 with the conduit 36 in stop-leak compound pressure storehouse 33 and the counterweight prolongation that links to each other with well aluminium hydraulic pressed connecting pipe 35.Wherein stop-leak compound pressure storehouse 33 comprises the container cavity 330 of accommodating stop-leak compound, is used to add the warehouse entry mouth 332 of stop-leak compound and can be in container cavity 330 movable and by conduit 36 feedbacks and amplify the piston 334 that well is pressed.Wherein via hole sliding way 31 is provided with locking wire knob 310, and transition passage 34 is provided with the adapter cavity 340 that is connected with container cavity 330, and stop-leak compound enters in the upper and lower slideway 31,32 of via hole through this adapter cavity 340 thus.Piston 334 is a tail end near conduit 36 1 sides promptly for the big little structure of head end of tail end, is head end near adapter cavity 340 1 sides, and the well that makes the thrust that promotes piston amplify at least 1.2 times is thus pressed.
During work, cable 10 connects collector 20 and weight linear meter, utilizes gravity to pass through the upper and lower slideway 31,32 of via hole of well head 1, and band is pressed collector 20 is sent into the down-hole.Cable 10 will continue to pass through the upper and lower slideway 31,32 of via hole; Must be gapped between slideway and the cable 10; In order to seal and 10 needs of lubricated cable constantly add stop-leak compound on slideway; In order to reach the effect of sealing chute, the dynamics of replenishing stop-leak compound must be greater than the pressure of well head, and promptly 1.2 times well is pressed.
Then Operating Pressure back pressure formula well head dynamic sealing device is installed to the top of production tree; Open the valve of collector turnover oil well; Well is pressed at first can get into stop-leak compound pressure storehouse 33 through conduit 36, and the well that the little structure of piston 334 tail major parts makes thrust amplify 1.2 times is pressed, and piston 334 pushes stop-leak compound in the adapter cavity 340; Part stop-leak compound moves towards the down-hole through the cable deformation gap of via hole glide path 32 downwards; And down-hole pressure also the cable deformation gap through via hole glide path 32 upwards push away stop-leak compound and move towards the antagonism mutually in slideway of 340, two bursts of motive forces of adapter cavity because downward motive force is always big than the motive force that makes progress; The stop-leak compound viscosity is very big again, gets into via hole sliding way 31 so down-hole pressure can not pass via hole glide path 32.Certainly downward motive force is only big 1.2 times than motive force upwards again, and calculating can know that owing to the length of slideway and the effect of stop-leak compound viscosity downward motive force also can not be passed via hole glide path 32 and got into oil wells.Another that comes out from stop-leak compound pressure storehouse simultaneously partly stop-leak compound upwards moves towards beyond the via hole sliding way 31 through the cable gap of via hole sliding way 31; Calculating can know because the length of slideway and the effect of stop-leak compound viscosity; When the pressure of 30MPa, the stop-leak compound that upwards promotes can not pass via hole sliding way 31.Hence one can see that, slide in the oil well process at cable 10, via hole glide path 32 be rely on well to press to promote that stop-leak compound is sealed well head pressure and the well head pressure size irrelevant.Via hole sliding way 31 is to seal stop-leak compound by the viscosity of length of tightening up via hole and slideway and stop-leak compound, has sealed the well pressure exactly and sealed stop-leak compound.Under high pressure deformation can take place in cable 10 in via hole sliding way 31; Because cable 10 is a software, the end pressure small deformation is just little on the via hole sliding way 31, and 31 times end pressure large deformation of via hole sliding way will be big; So one section cable in via hole sliding way 31 is a upper-wide lower-thin state; Cable can produce the strength that upwards promotes cable like this, but this thrust is less relatively, can eliminate through counterweight.The stop-leak compound of the utility model device is the vacuum silicone grease of heatproof-50 ℃～200 ℃.
Certainly the foregoing description only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the people who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection domain of the utility model with this.All equivalent transformation or modifications of doing according to the spirit of the utility model main technical schemes all should be encompassed within the protection domain of the utility model.
Claims (4)
1. Operating Pressure back pressure formula well head dynamic sealing device is characterized in that it comprises: allow the upper and lower slideway of via hole (31,32), the stop-leak compound pressure storehouse (33) that is arranged on the upper and lower slideway of via hole (31, a 32) side that cable (10) passes, be arranged on the transition passage (34) between the upper and lower slideway of via hole (31,32), the well aluminium hydraulic pressed connecting pipe (35) that is set in via hole glide path (32) outside and an end link to each other with well aluminium hydraulic pressed connecting pipe (35) other end then with the conduit (36) in stop-leak compound pressure storehouse (33).
2. a kind of Operating Pressure back pressure formula well head dynamic sealing device according to claim 1 is characterized in that: said stop-leak compound pressure storehouse (33) comprises the container cavity (330) of accommodating stop-leak compound, be used to add the warehouse entry mouth (332) of stop-leak compound and can be in container cavity (330) movable and by conduit (36) feedback and amplify the piston (334) that well is pressed.
3. a kind of Operating Pressure back pressure formula well head dynamic sealing device according to claim 2, it is characterized in that: said transition passage (34) is provided with the adapter cavity (340) that is connected with container cavity (330), and piston (334) is little for the big head end of tail end.
4. a kind of Operating Pressure back pressure formula well head dynamic sealing device according to claim 3 is characterized in that: it comprises that further the counterweight that links to each other with well aluminium hydraulic pressed connecting pipe (35) prolongs pipe (37).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220021604 CN202611649U (en) | 2012-01-17 | 2012-01-17 | Pressure return type well opening movable sealing device capable of running with pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220021604 CN202611649U (en) | 2012-01-17 | 2012-01-17 | Pressure return type well opening movable sealing device capable of running with pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202611649U true CN202611649U (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220021604 Expired - Fee Related CN202611649U (en) | 2012-01-17 | 2012-01-17 | Pressure return type well opening movable sealing device capable of running with pressure |
Country Status (1)
| Country | Link |
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| CN (1) | CN202611649U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019850A (en) * | 2014-04-29 | 2015-11-04 | 北京奥瑞安能源技术开发有限公司 | Wellhead sealing device and using method |
-
2012
- 2012-01-17 CN CN 201220021604 patent/CN202611649U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019850A (en) * | 2014-04-29 | 2015-11-04 | 北京奥瑞安能源技术开发有限公司 | Wellhead sealing device and using method |
| CN105019850B (en) * | 2014-04-29 | 2017-04-12 | 北京奥瑞安能源技术开发有限公司 | Wellhead sealing device and using method |
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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: 20121219 Termination date: 20150117 |
|
| EXPY | Termination of patent right or utility model |