CN2661917Y - Oil recovery system with electric submersible screw pump suspended by cable - Google Patents
Oil recovery system with electric submersible screw pump suspended by cable Download PDFInfo
- Publication number
- CN2661917Y CN2661917Y CN 200320125828 CN200320125828U CN2661917Y CN 2661917 Y CN2661917 Y CN 2661917Y CN 200320125828 CN200320125828 CN 200320125828 CN 200320125828 U CN200320125828 U CN 200320125828U CN 2661917 Y CN2661917 Y CN 2661917Y
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- China
- Prior art keywords
- screw pump
- cable
- steel wire
- packer
- electric submersible
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- 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 utility model discloses an oil-production system of the cable suspension submersible screw pump, which comprises a power cable, a screw pump unit, a packer and an eccentric wellhead sealing device which is arranged at the wellhead; the eccentric wellhead sealing device comprises two sets of flexible joints at the upper end and the lower end of a wellhead flange component, and a seal joint which is connected with the flexible joint; the flexible joint is provided with an inner press cap and a sealing head; filling is arranged between the inner press cap and the sealing head; an outer press cap is arranged on one side of the sealing head, a cable fixing bushing is connected with the outer press cap; the power cable comprises an inner-layer steel wire and an outer-layer steel wire which comprise multi-core wire and are wound at the periphery of the cable; the winding direction of the multi-core wire of the inner-layer steel wire and outer-layer steel wire is opposite; the packer is in a packing cup slip structure, a sliding bush and a support slid are arranged on the outer side of the packer. The utility model can be applicable for the environmental conditions of straight well, slant well, deviated well and deep well.
Description
Technical field
The utility model relates to a kind of oil exploitation system, relates in particular to a kind of hoisting system that is used for oil exploitation.
Background technology
In the oil exploitation industry, along with the development of screw pump technology, the oil field more and more adopts screw pump to recover the oil both at home and abroad.Usually, screw pump oil production mainly contains ground bar driven screw pump oil pumping mode and electric submersible screw pump oil pumping mode, wherein, ground bar driven screw pump oil pumping mode is mainly used in more shallow straight well work condition environment, and for the inclined shaft work condition environment, owing in oil pumping process, exist serious bar, pipe wearing and tearing, therefore, also under the inclined shaft work condition environment, do not use the precedent of ground bar driven screw pump oil pumping at present both at home and abroad; Another electric submersible screw pump oil pumping mode, promptly take the screw pump unit to down-hole with oil pipe, and use oil pipe as oil discharge passage simultaneously, this electric submersible screw pump oil pumping mode has certain limitation for the work condition environment of big discharge capacity well, and the construction operation complexity, the cost for oil production height.
The utility model content
At above-mentioned prior art, the utility model provides a kind of oil extraction system of using the cable suspension electric submersible screw pump, and its form of construction work is simple, and construction speed is fast, the oil recovery cost of production is low, and can be widely used in straight well, oblique straight well, inclined shaft and deep-well work condition environment.
In order to solve the problems of the technologies described above, the oil extraction system of a kind of cable suspension electric submersible screw pump of the utility model, comprise power cable, place the screw pump unit of down-hole, packer and centralizer, it is characterized in that: also comprise the decentralized wellhead sealing device that is arranged on the well head place, described decentralized wellhead sealing device comprises and being positioned on the wellhead flange parts, two groups of active joints at following two ends and the seal nipple that is connected with described active joint, described seal nipple comprises interior pressure cap and the seal head that places in the active joint, be provided with filler between pressure cap and the seal head in described, pressure cap outside an end of seal head is provided with, the connector of cable fixed cover is connected with outer pressure cap; Described power cable comprises and is wrapped in the inside and outside two-layer steel wire cable periphery and that be made up of the multicore steel wire that the direction that the multicore steel wire in described steel wire of internal layer and the cover wire twines is opposite; Described packer is a leather cup slips structure, in its arranged outside sliding sleeve and supporting slip is arranged.
Packer described in the utility model oil extraction system also is provided with two axial via holes; In addition, also be provided with tail pipe below the screw pump unit, described tail pipe weight is decided according to the pit shaft projected depth; Also be provided with the anti-rotation anchor, described anti-rotation anchor anchor tooth is what erect.
Compared with prior art, the beneficial effects of the utility model are:
1. in the utility model oil extraction system,, both eliminated the wear problem of rod tube, and do not needed bar, pipe centralizer again, thereby reduced the completion cost owing to removed traditional bar, pipe.
2. the utility model oil extraction system form of construction work is simple, has accelerated construction speed, has reduced workover cost.
3. expand the range of application of screw pump in oilfield exploitation is produced, can adapt to straight well, oblique straight well, inclined shaft and deep-well work condition environment widely.
Description of drawings
Fig. 1 is the utility model embodiment one positively fixed type cable suspension electric submersible screw pump oil extraction system structural representation;
Fig. 2 is decentralized wellhead sealing device 1 structural representation that adopts in the utility model oil extraction system;
Fig. 3 is the structural representation of the anchor packer of leather cup shown in Fig. 13;
Fig. 4 is high pressure resistant carrying power cable 6 structural representations that adopt in the utility model oil extraction system;
Fig. 5 is the utility model embodiment two inversion type cable suspension electric submersible screw pump oil extraction system structural representations.
It below is the explanation of main Reference numeral in the utility model Figure of description.
1---decentralized wellhead sealing device 2---fishing head
3---packer 4---gate gurgle valve
5---ball-and-seat 6---power cable
7---screw pump unit 8---tail pipe
9---pressure tester 11---wellhead flange parts
12---active joint 13---seal nipple
14---interior pressure cap 15---seal head
The outer pressure cap of 16---fillers 17---
18---cable fixed cover 19---connector
20---link slot 60---cable
65---steel wire of internal layer 66---cover wire
The specific embodiment
Below in conjunction with accompanying drawing the utility model cable suspension electric submersible screw pump oil extraction system is done to describe in further detail.Fig. 1 shows and implements underneath type wire rope suspension electric submersible screw pump oil extraction system in the utility model oil extraction system, it comprises: power cable 6, the screw pump unit 7 that places the down-hole, packer 3, gate gurgle valve 4, ball-and-seat 5, the effect of described gate gurgle valve 4 is to open it when tripping out down-hole string, make described packer 3 upper and lower connections, be the liquid of packer more than 3 by bleeder 4 flow to packer 3 below, the load when alleviating operation.The effect of described ball-and-seat 5 is: when screw pump unit 7 was shut down, the load of ball-and-seat 5 above liquid not be owing to the existence of ball-and-seat 5 can affact on the screw pump, thereby avoided liquid to miss by pump housing.In order to connect well head and downhole cable, guarantee the sealing of well head, be provided with decentralized wellhead sealing device 1 at the well head place, the structure of described decentralized wellhead sealing device 1 as shown in Figure 2, it comprises and being positioned on the wellhead flange parts 11, two groups of active joints 12 at following two ends and the seal nipple 13 that is connected with described active joint 12, described each seal nipple 13 comprises interior pressure cap 14 and the seal head 15 that places in the active joint 12, be provided with filler 16 between pressure cap 14 and the seal head 15 in described, pressure cap 17 outside an end of seal head 15 is outside equipped with, the connector 19 of cable fixed cover 18 is connected with the link slot 20 of outer pressure cap.During work, the seal nipple 13 in the described decentralized wellhead sealing device 1 can bear the pulling force of power cable 6, can prevent that again power cable 6 from falling in the well.
Fig. 3 shows embodiment one in the utility model oil extraction system, be that the packer 3 that positively fixed type cable suspension electric submersible screw pump oil extraction system is adopted is leather cup slips structures, comprise cup packing part 71, two axial passages 72, but sliding sleeve 73 and supporting slip 74 that the side direction switch is arranged in its arranged outside, described sliding sleeve 73 can contact for the conical surface with type of attachment between the supporting slip 74, also can be for being threaded, the packer 3 of described leather cup slips structure is last with pit shaft liquid, following two parts, the fluid that screw pump is exported can not flow backwards to get back to and enter the mouth and the formation circulation, makes screw pump give rise to ground to shaft bottom liquid.In addition, 74 pairs of tubing strings of supporting slip and screw pump unit play fixation.
Fig. 4 show adopted in the utility model oil extraction system have a strong power cable of high pressure resistant supporting capacity.Our normally used common cable is shown in Reference numeral among Fig. 4 60, cable 60 from inside to outside comprises cable core 61 successively, insulation materials 62, cable armour skin 63 and cable epidermis rubber 64, the peak load of being born when satisfying power cable 6 operations, strengthen the axial carrying capacity of power cable 6, described power cable 6 comprise be wrapped in cable 60 peripheries and by the multicore steel wire form in, outer two- layer steel wire 65 and 66, the direction that multicore steel wire in described steel wire of internal layer 65 and the cover wire 66 twines is opposite, in described, outer steel wire floor 65 and 66 winding structure have increased the radial load to cable 60 parcels, can avoid cable 60 landing in the steel wire floor.This shows that the high pressure resistant carrying power cable 6 that adopts in the utility model not only has stronger axial force and warp-wise power, simultaneously, the inside and outside steel wire floor 65 and 66 in the power cable 6 has also been strengthened the protection to cable 60.
In addition, also be provided with tail pipe 8 below screw pump unit 7, and fixed, the weight of described tail pipe 8 can make cable-passing packer arrive the pit shaft projected depth 3 times to the weight of described tail pipe 8 according to the pit shaft projected depth.Pressure tester 9 can adopt the PSI pressure tester, and when ordinary production, pressure tester 9 monitoring streams are pressed, during closing well, but pressure tester 9 geodetic stressor layers.
Fig. 5 shows the utility model oil extraction system embodiment two, it is inversion type cable suspension electric submersible screw pump oil extraction system, its chief component and embodiment one positively fixed type cable suspension electric submersible screw pump oil extraction system are roughly the same, the main distinction is exactly that packer 3 is placed on the electric submersible screw pump unit below 7, power cable 6 is packer 3 only, simplify the design of packer 3, promptly with on the packer 3 of its adapted do not had the hole of power cable 6.
In the utility model oil extraction system the anti-rotation anchor can also be set, described anti-rotation anchor anchor tooth along circumferentially rotating, avoids stator to come off to prevent oil pipe for what erect.
In sum, the utility model oil extraction system has been expanded the range of application of screw pump in oilfield exploitation is produced, and can adapt to straight well, oblique straight well, inclined shaft and deep-well work condition environment widely.
Although in conjunction with the accompanying drawings the utility model is described above; but the utility model is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not breaking away under the scope situation that the utility model aim and claim protect, can also make a lot of distortion, these all belong within the protection of the present utility model.
Claims (4)
1. cable suspension electric submersible screw pump oil extraction system, comprise power cable, place the screw pump unit of down-hole, packer, gate gurgle valve and ball-and-seat, it is characterized in that: also comprise the decentralized wellhead sealing device that is arranged on the well head place, described decentralized wellhead sealing device comprises and being positioned on the wellhead flange parts, two groups of active joints at following two ends and the seal nipple that is connected with described active joint, described seal nipple comprises interior pressure cap and the seal head that places in the active joint, be provided with filler between pressure cap and the seal head in described, pressure cap outside an end of seal head is provided with, the connector of cable fixed cover is connected with outer pressure cap; Described power cable comprises and is wrapped in the inside and outside two-layer steel wire cable periphery and that be made up of the multicore steel wire that the direction that the multicore steel wire in described steel wire of internal layer and the cover wire twines is opposite; Described packer is a leather cup slips structure, in its arranged outside sliding sleeve and supporting slip is arranged.
2. a kind of cable suspension electric submersible screw pump oil extraction system according to claim 1, it is characterized in that: described packer also is provided with two axial via holes.
3. a kind of cable suspension electric submersible screw pump oil extraction system according to claim 1 is characterized in that: also be provided with tail pipe below the screw pump unit, described tail pipe weight is decided according to the pit shaft projected depth.
4. a kind of cable suspension electric submersible screw pump oil extraction system according to claim 1 is characterized in that: also be provided with the anti-rotation anchor, described anti-rotation anchor anchor tooth rotates along circumferential to prevent oil pipe for what erect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320125828 CN2661917Y (en) | 2003-12-16 | 2003-12-16 | Oil recovery system with electric submersible screw pump suspended by cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320125828 CN2661917Y (en) | 2003-12-16 | 2003-12-16 | Oil recovery system with electric submersible screw pump suspended by cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2661917Y true CN2661917Y (en) | 2004-12-08 |
Family
ID=34349320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320125828 Expired - Lifetime CN2661917Y (en) | 2003-12-16 | 2003-12-16 | Oil recovery system with electric submersible screw pump suspended by cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2661917Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007104186A1 (en) * | 2006-03-14 | 2007-09-20 | Xihuan Zhao | A suspensory electrical submersible screw pumping system |
| CN105485028A (en) * | 2015-12-31 | 2016-04-13 | 中国石油天然气股份有限公司 | Suspension type oil-submersible direct-drive screw pump oil production device |
| CN107780912A (en) * | 2016-08-31 | 2018-03-09 | 中国石油天然气股份有限公司 | Cased well fracturing fluid drainage method and system |
-
2003
- 2003-12-16 CN CN 200320125828 patent/CN2661917Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007104186A1 (en) * | 2006-03-14 | 2007-09-20 | Xihuan Zhao | A suspensory electrical submersible screw pumping system |
| US7780428B2 (en) * | 2006-03-14 | 2010-08-24 | Zhao Xihuan | Fluid-guiding and electric conducting system for suspended electric submersible progressing cavity pump (PCP) |
| CN105485028A (en) * | 2015-12-31 | 2016-04-13 | 中国石油天然气股份有限公司 | Suspension type oil-submersible direct-drive screw pump oil production device |
| CN107780912A (en) * | 2016-08-31 | 2018-03-09 | 中国石油天然气股份有限公司 | Cased well fracturing fluid drainage method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131216 Granted publication date: 20041208 |