CN202148884U

CN202148884U - Crude oil cleaning device at repaired well mouth

Info

Publication number: CN202148884U
Application number: CN201120258287U
Authority: CN
Inventors: 张立波; 陈永锋; 郭树彬
Original assignee: China National Offshore Oil Corp CNOOC; CNOOC Energy Technology and Services Ltd; Supervision and Technology Branch of CNOOC Energy Technology and Services Ltd
Current assignee: China National Offshore Oil Corp CNOOC; CNOOC Energy Technology and Services Ltd; Supervision and Technology Branch of CNOOC Energy Technology and Services Ltd
Priority date: 2011-07-20
Filing date: 2011-07-20
Publication date: 2012-02-22
Anticipated expiration: 2021-07-20

Abstract

The utility model relates to a crude oil cleaning device at repaired well mouth comprising a metal trumpet tube; wherein the trumpet tube is provided with a water cleaning module and an overflow mouth, the water cleaning module is opened with at least one level of water injecting holes, each level of water injecting holes are distributed at inner side surface of the water cleaning module, an include angle is formed between two levels of water injecting holes and the trumpet tube body, the water cleaning module is connected with a booster pump via a connecting pipe. The advantages are as follows: the well washing time can be shortened half, the welling efficiency is enhanced, the outer wall of the production pipe can be clean completely, the workover fluid leakage can be reduced, the reservoir damage is lessened, the oil drip can be avoided from being blown into the sea and the environment protection effect is excellent. Furthermore, the device does not need diesel oil or flushing fluid to soak and wash the well, thereby effectively saving the operation cost, shortening the water drainage period of the washing operation and making the production capacity recover to the level before the washing operation rapid.

Description

Well workover well head crude oil washing/COW device

Technical field

The utility model belongs to the oil well well workover and uses cleaning equipment, particularly relates to a kind of well workover well head crude oil washing/COW device.

Background technology

Very high during the marine oil field well workover to environmental protection requirement, must the flow string that trip out fully be cleaned up before pulling out of hole.At present, before the marine conventional well workover lift pipe string to the cleaning of flow string through the anti-completion that circulates of well-repairing work liquid in the down-hole.Conventional well workover was washed about needs of kill-job time two days; That have even reach tens days, wherein a part is washed the kill-job time and is absolutely necessary, and comprises kill-job time and the time that inner tubal wall is enough cleaned; This part operation generally can be accomplished in one day, and all the other times are pure duration of well flushing.Wash kill-job at present for a long time, can produce following drawback: 1, wash kill-job for a long time, miss greatlyyer, bigger pollution is caused on the stratum,, pollute even more seriously, reduced the ultimate recovery in oil field especially to water-sensitive formation.Though 2 have experienced the kill-job of washing of long period, a lot of heavy oil wells still can not clean up oil pipe, have increased the difficulty that makes a trip, and pollute the work-yard simultaneously.Greasy dirt can be walked about through personnel and taken other place to, not only is difficult to reach the platform hygienic requirements, and has potential safety hazard.If make a trip when wind is arranged, the part oil droplet can descend slowly and lightly into the sea, causes the pollution to marine environment.3, a large amount of diesel oil of clean-out service consumption remove to soak oil pipe, even the well that has also need use flushing fluid, and expense is higher; In addition, the growth activity duration can cause expenses such as personnel, instrument, equipment leasing also many, and then has increased the clean-out service expense.4, all need experience one section drainage period after the operation, can return to the production capacity level before the operation after longer a period of time of oil well production, have in addition can't return to production capacity before the operation again.

Summary of the invention

The utility model for solve the technical problem that exists in the known technology provide a kind of simple in structure, can effectively save washing and cleaning operation time and expense and can improve the well workover well head crude oil washing/COW device of environment protecting.

The mentality of designing of the utility model is: for general stratum energy is not very high oil well; Generally speaking through realizing kill-job about two circulating cycles; Because the oil pipe internal volume is little; Rate of flow of fluid is fast, and the tube inner wall clean-up performance can satisfy and pounds gate gurgle valve or drag for the stifled requirement of Y after two circulating cycles.In this case, save the pure duration of well flushing of part in traditional duration of well flushing, change oil-pipe external wall into,, be implemented in the function that well head cleans the tubing string outer tube wall when pulling out of hole promptly through instrument provided by the present invention in the operation of well head wash cycles.

The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is:

Well workover well head crude oil washing/COW device; The oviduct that comprises metal material; It is characterized in that: said oviduct is provided with waterpower cleaning module and overfall, is shaped on one-level on the said waterpower cleaning module at least and sprays hydrophthalmia, and said injection water eye thimble shape is distributed in waterpower cleaning module medial surface; Spray the angle that is provided with adjustable angle between hydrophthalmia and the oviduct body, said waterpower cleaning module connects booster pump through tube connector.

The utility model can also adopt following technical scheme:

Be shaped on two-stage on the said waterpower cleaning module and spray hydrophthalmia.

Said waterpower cleaning module is arranged on the joint of the horn mouth and the cylinder straight tube outer wall of oviduct, and said waterpower cleaning module and oviduct are made as an overall structure.

Be fixed with removable waterpower cleaning module on the horn mouth inwall of said oviduct.

The angle that said two-stage is sprayed between hydrophthalmia and the oviduct body is between 20 ~ 80 °.

Advantage and the good effect that the utlity model has are: because the utility model adopts technique scheme; Spraying the oblique below of hydrophthalmia through the two-stage on the waterpower cleaning module after utilizing this device to make well-repairing work liquid through the booster pump pressurization sprays at a high speed; The crude oil that the flow string that will trip out from the down-hole adheres to is rinsed well; Soiling solution enters into slurry tank via the oviduct overfall subsequently; Thereby reach trip-out limit, limit in the effect that well head cleans former well flow string, must anti-circulation goes to the cleaning of part tubing string aboveground the present situation that down-hole string cleans up from the down-hole in the down-hole through flushing fluid when changing traditional marine oil field well workover.Like this, not only can shorten about half washing the kill-job time, improve clean-out service efficient, will produce pipe and manage outer wall and thoroughly clean up, but also can reduce the workover fluid wastage, alleviate reservoir damage, it is marine to avoid oil droplet to be blown into, and environment protecting is good.In addition, use this device to need not to soak well-flushing with diesel oil or flushing fluid, effectively save operating cost, shorten the operation drainage period, production capacity comparatively fast returns to the level before the operation.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is the structural representation of the utility model embodiment 2.

Among the figure: 1, flow string; 2, oviduct; 3, cleaning module; 4, hydrophthalmia is sprayed in the second level; 5, the first order is sprayed hydrophthalmia; 6, tube connector; 7, booster pump; 8, well-repairing work liquid inlet; 9, overfall.

The specific embodiment

For further understanding summary of the invention, characteristics and the effect of the utility model, the following examples of giving an example now, and conjunction with figs. specifies as follows:

Embodiment 1, sees also Fig. 1, well workover well head crude oil washing/COW device; The oviduct 2 that comprises metal material; Said oviduct is provided with waterpower cleaning module 3 and overfall 9, is shaped on two-stage on the said waterpower cleaning module 3 and sprays hydrophthalmia, and promptly the first order is sprayed hydrophthalmia 5 and sprayed hydrophthalmia 4 with the second level.Said two-stage is sprayed the angle that is provided with adjustable angle between hydrophthalmia and the oviduct body, and said angle is between 20 ~ 80 °, and in the present embodiment, said angle is preferably 50 °.Said waterpower cleaning module connects booster pump 7 through tube connector 6.Said waterpower cleaning module 3 is arranged on the joint of the horn mouth and the cylinder straight tube outer wall of oviduct, and said waterpower cleaning module and oviduct are made as an overall structure, can directly replace the oviduct that former well workover is used like this.GEOTHERMAL WATER or filtering sea enter into waterpower cleaning module 3 from well-repairing work liquid inlet 8 through booster pump 7; Spraying hydrophthalmia via two-stage wherein sprays at a high speed; Clean up tube wall or cable of flow string 1 etc., soiling solution enters into slurry tank through overfall 9 then.The design up and down purpose of two-stage hydrophthalmia is that dirtier mixed liquor can upwards splash after water jet that following one-level hydrophthalmia 5 ejects cleaned tube wall, and the clean fluid that second level hydrophthalmia 4 ejects can be suppressed dirty mixed liquor, avoids splashing the top.

Embodiment 2, see also Fig. 2, and well workover well head crude oil washing/COW device comprises that the oviduct 2 of metal material, said oviduct are provided with waterpower cleaning module 3 and overfall 9, are fixed with removable waterpower cleaning module 3 on the horn mouth inwall of oviduct.For reducing the washing and cleaning operation expense, can use traditional oviduct, promptly on the horn mouth inwall of traditional oviduct, be fixed with removable waterpower cleaning module 3.Be shaped on two-stage on the said waterpower cleaning module 3 and spray hydrophthalmia, promptly the first order is sprayed hydrophthalmia 5 and is sprayed hydrophthalmia 4 with the second level.Said two-stage is sprayed the angle that is provided with adjustable angle between hydrophthalmia and the oviduct body, and said angle is between 20 ~ 80 °, in the present embodiment, and preferred 45 ° of said angle.Said waterpower cleaning module connects booster pump 7 through tube connector 6.GEOTHERMAL WATER or filtering sea enter into waterpower cleaning module 3 from well-repairing work liquid inlet 8 through booster pump 7; Two-stage via is wherein sprayed the hydrophthalmia high velocity jet; Clean up tube wall or cable of flow string 1 etc., soiling solution enters into slurry tank through overfall 9.Behind the design water jet cleaning tube wall that the main following one-level hydrophthalmia 5 of purpose of two-stage hydrophthalmia ejects up and down, dirtier mixed liquor can upwards splash, and the clean fluid that second level hydrophthalmia 4 ejects can be suppressed dirty mixed liquor and avoided splashing the top.

Claims

1. well workover well head crude oil washing/COW device; The oviduct that comprises metal material; It is characterized in that: said oviduct is provided with waterpower cleaning module and overfall, is shaped on one-level on the said waterpower cleaning module at least and sprays hydrophthalmia, and said injection water eye thimble shape is distributed in waterpower cleaning module medial surface; Spray the angle that is provided with adjustable angle between hydrophthalmia and the oviduct body, said waterpower cleaning module connects booster pump through tube connector.

2. well workover well head crude oil washing/COW device according to claim 1 is characterized in that: be shaped on two-stage on the said waterpower cleaning module and spray hydrophthalmia.

3. well workover well head crude oil washing/COW device according to claim 2 is characterized in that: said waterpower cleaning module is arranged on the joint of the horn mouth and the cylinder straight tube outer wall of oviduct, and said waterpower cleaning module and oviduct are made as an overall structure.

4. well workover well head crude oil washing/COW device according to claim 2 is characterized in that: be fixed with removable waterpower cleaning module on the horn mouth inwall of said oviduct.

5. well workover well head crude oil washing/COW device according to claim 2 is characterized in that: the angle that said two-stage is sprayed between hydrophthalmia and the oviduct body is between 20 ~ 80 °.