CN204040994U - A kind of gradually deblocking packer of oilfield exploitation - Google Patents
A kind of gradually deblocking packer of oilfield exploitation Download PDFInfo
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- CN204040994U CN204040994U CN201420361426.5U CN201420361426U CN204040994U CN 204040994 U CN204040994 U CN 204040994U CN 201420361426 U CN201420361426 U CN 201420361426U CN 204040994 U CN204040994 U CN 204040994U
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Abstract
The utility model discloses a kind of gradually deblocking packer of oilfield exploitation, it comprises top connection (1), the upper steel bushing (2) be connected with top connection (1) and lock (6), lock (6) is fixed with release plunger (11), lock (6) is fixed on central tube (21) by lock dog (10), central tube (21) is connected with lift nut (4) and locating ring (14), snap seat (16) is enclosed within central tube (21) and the lower end of locating ring (14) respectively, snap seat (16) is threaded with backwash cover (17) top, the bottom of upper steel bushing (2) is threaded with fixed cover (18).This gradually deblocking packer, reasonable in design, convenient and reliable operation, effectively can realize Inter-zonal packing, improve each sealing layer flood effectiveness, individual layer deblocking packer successively during lift pipe string, tubing string can trip out well head smoothly, construction safety, deblocking power can remain on about 70 ~ 100kN, and operating efficiency is high.
Description
Technical field
The utility model relates to a kind of oilfield exploitation instrument, especially relates to a kind of gradually deblocking packer of the concentric oilfield exploitation for the position seperated layer water injection of oilfield multilayer.
Background technology
Along with the fast development of economic technology, oilfield exploitation obtains and develops rapidly, in oil extraction process.The water injection packer that prior art Oil Field uses, when individual layer uses, deblocking power is at 70 ~ 100KN, and when multiple-string packer combinationally uses, it is exactly a very large power that deblocking power adds up.Due to the device-restrictive of lift pipe string, just very difficult during site operation, even cannot trip out down-hole string, normal occur stretching thread off, break oil pipe, dirty fork clip well the accident such as can not to play and occurs.
Therefore, on the basis of existing technology necessary, design a kind of reasonable in design, have layer position and cut off effective, deblocking power is little, adapts to conventional construction job requirements, improves efficiency of construction, reduces the gradually deblocking packer of the oilfield exploitation of accident risk.
Summary of the invention
Goal of the invention: the purpose of this utility model is to solve the deficiencies in the prior art, have layer position and cut off effective, deblocking power is little, adapt to conventional construction job requirements, efficiency of construction is high, can ensure working security, reduces the gradually deblocking packer of the oilfield exploitation of accident risk.
Technical scheme: in order to realize above object, technical solution adopted in the utility model is:
A kind of gradually deblocking packer of oilfield exploitation, it comprises: top connection, the upper steel bushing be connected by shear pin with top connection, the lock be threaded with top connection lower end, lock is fixed with release plunger by pin, described lock is fixed on central tube by lock dog, described central tube is connected with lift nut and locating ring, snap seat is enclosed within the lower end with locating ring on central tube respectively, described snap seat and backwash are overlapped top and are threaded, and the bottom of described upper steel bushing is threaded with fixed cover;
Central tube outside is provided with exterior central tube, and the lower end of lock tube is threaded on exterior central tube, and upper glue tube base is enclosed within exterior central tube upper end and overlaps lower thread with backwash and docks; On described exterior central tube, cover has two limit packing elements and a middle packing element, and middle packing element is positioned at packing elements centre, two limits and separates with spacer ring, and the upper and lower side of limit packing element is separately installed with packing element shoulder protector, and the bottom of described exterior central tube is threaded with lower rubber cylinder seat;
The lower end of described central tube is threaded with the top of lower center tube, and piston bush to be enclosed within lower center tube and to connect with lower steel bushing, and lower center tube is threaded with lower contact.
Preferably, the gradually deblocking packer of above-described oilfield exploitation, described lower steel bushing top connects with lower rubber cylinder seat, and lower rubber cylinder seat lower end is provided with sealing ring and protective sleeve.
Preferably, the gradually deblocking packer of above-described oilfield exploitation, the bottom of described central tube is provided with backwash piston.
Preferably, the gradually deblocking packer of above-described oilfield exploitation, described piston bush one end is fixed in lower contact by shear pin and shear pin seat.
The gradually deblocking packer of the oilfield exploitation that the utility model provides, adopt with inner central tube part the principle being separated combination in packer top connection, go into the well work time be in combination seal, and meet packer various functions, and can be separated voluntarily after reaching certain pressure, for packer classification deblocking provides condition.
Gradually deblocking packer design locking mechanism and release mechanism there is the function of restting, can reach in down-hole and repeatedly set.And be provided with the anti-flushing well passage of washing well, there is the effect meeting high flow rate washover, adopt knockdown backwash valve, close reliable, good stability.
Beneficial effect: compared to the prior art the gradually deblocking packer of the oilfield exploitation that the utility model provides has the following advantages:
The gradually deblocking packer of oilfield exploitation described in the utility model, reasonable in design, easy to operate, effectively can realize Inter-zonal packing, improve each sealing layer flood effectiveness, and when lift pipe string individual layer deblocking packer successively, tubing string can trip out well head smoothly, ensure construction safety, reduce accident risk.
And this gradually deblocking packer is compared with the water injection packer of prior art, dispensing effect is more obvious, and deblocking is light when lift pipe string, deblocking power can remain at about 70 ~ 100kN, favourable on-the-spot conventional construction operation, operating efficiency is high, can overcome many deficiencies of prior art.
Accompanying drawing explanation
The structural representation of the gradually deblocking packer of the oilfield exploitation that Fig. 1 provides for the utility model.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the utility model further, these embodiments should be understood and be only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
As shown in Figure 1, a kind of gradually deblocking packer of oilfield exploitation, it comprises: top connection (1), the upper steel bushing (2) be connected by shear pin with top connection (1), the lock (6) be threaded with top connection (1) lower end, lock (6) is fixed with release plunger (11) by pin, described lock (6) is fixed on central tube (21) by lock dog (10), described central tube (21) is connected with lift nut (4) and locating ring (14), snap seat (16) is enclosed within central tube (21) and the lower end of locating ring (14) respectively, described snap seat (16) is threaded with backwash cover (17) top, the bottom of described upper steel bushing (2) is threaded with fixed cover (18),
Central tube (21) outside is provided with exterior central tube (22), the lower end of lock tube (20) is threaded on exterior central tube (22), and upper glue tube base (23) is enclosed within exterior central tube (22) upper end and docks with backwash cover (17) lower thread; The upper cover of described exterior central tube (22) has two limit packing elements (25) and a middle packing element (27), middle packing element (27) is positioned in the middle of two limit packing elements (25) and also separates with spacer ring (26), and the upper and lower side of limit packing element (25) is separately installed with packing element shoulder protector (28), the bottom of described exterior central tube (22) is threaded with lower rubber cylinder seat (30);
The lower end of described central tube (21) is threaded with the top of lower center tube (39), piston bush (42) is enclosed within lower center tube (39) and goes up and connect with lower steel bushing (38), and lower center tube (39) is threaded with lower contact (45).
The gradually deblocking packer of above-described oilfield exploitation, described lower steel bushing (38) top connects with lower rubber cylinder seat (30), and lower rubber cylinder seat (30) lower end is provided with sealing ring and protective sleeve.
The gradually deblocking packer of above-described oilfield exploitation, the bottom of described central tube (21) is provided with backwash piston (35).
The gradually deblocking packer of above-described oilfield exploitation, described piston bush (42) one end is fixed in lower contact (45) by shear pin (43) and shear pin seat (44).
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. the gradually deblocking packer of an oilfield exploitation, it is characterized in that, it comprises: top connection (1), the upper steel bushing (2) be connected by shear pin with top connection (1), the lock (6) be threaded with top connection (1) lower end, lock (6) is fixed with release plunger (11) by pin, described lock (6) is fixed on central tube (21) by lock dog (10), described central tube (21) is connected with lift nut (4) and locating ring (14), snap seat (16) is enclosed within central tube (21) and the lower end of locating ring (14) respectively, described snap seat (16) is threaded with backwash cover (17) top, the bottom of described upper steel bushing (2) is threaded with fixed cover (18),
Central tube (21) outside is provided with exterior central tube (22), the lower end of lock tube (20) is threaded on exterior central tube (22), and upper glue tube base (23) is enclosed within exterior central tube (22) upper end and docks with backwash cover (17) lower thread; The upper cover of described exterior central tube (22) has two limit packing elements (25) and a middle packing element (27), middle packing element (27) is positioned in the middle of two limit packing elements (25) and also separates with spacer ring (26), and the upper and lower side of limit packing element (25) is separately installed with packing element shoulder protector (28), the bottom of described exterior central tube (22) is threaded with lower rubber cylinder seat (30);
The lower end of described central tube (21) is threaded with the top of lower center tube (39), piston bush (42) is enclosed within lower center tube (39) and goes up and connect with lower steel bushing (38), and lower center tube (39) is threaded with lower contact (45).
2. the gradually deblocking packer of oilfield exploitation according to claim 1; it is characterized in that; described lower steel bushing (38) top connects with lower rubber cylinder seat (30), and lower rubber cylinder seat (30) lower end is provided with sealing ring and protective sleeve.
3. the gradually deblocking packer of oilfield exploitation according to claim 1, is characterized in that, the bottom of described central tube (21) is provided with backwash piston (35).
4. the gradually deblocking packer of oilfield exploitation according to claim 1, it is characterized in that, described piston bush (42) one end is fixed in lower contact (45) by shear pin (43) and shear pin seat (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420361426.5U CN204040994U (en) | 2014-06-30 | 2014-06-30 | A kind of gradually deblocking packer of oilfield exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420361426.5U CN204040994U (en) | 2014-06-30 | 2014-06-30 | A kind of gradually deblocking packer of oilfield exploitation |
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| Publication Number | Publication Date |
|---|---|
| CN204040994U true CN204040994U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420361426.5U Active CN204040994U (en) | 2014-06-30 | 2014-06-30 | A kind of gradually deblocking packer of oilfield exploitation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109306854A (en) * | 2017-07-26 | 2019-02-05 | 中国石油天然气股份有限公司 | Gradually deblocking packer and separate layer water injection string |
-
2014
- 2014-06-30 CN CN201420361426.5U patent/CN204040994U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109306854A (en) * | 2017-07-26 | 2019-02-05 | 中国石油天然气股份有限公司 | Gradually deblocking packer and separate layer water injection string |
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