CN209780856U - Water injection structure for offshore oilfield water injection well - Google Patents
Water injection structure for offshore oilfield water injection well Download PDFInfo
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- CN209780856U CN209780856U CN201920571128.1U CN201920571128U CN209780856U CN 209780856 U CN209780856 U CN 209780856U CN 201920571128 U CN201920571128 U CN 201920571128U CN 209780856 U CN209780856 U CN 209780856U
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Abstract
the utility model relates to the technical field of oil field production, in particular to a water injection structure for a water injection well of an offshore oil field; the water injection structure for the offshore oil field water injection well is large in circulation drift diameter, capable of preventing blockage and wide in water flow adjusting range; the technical scheme is as follows: the utility model provides a water injection structure for offshore oil field water injection well, includes the flow distributor main part, vertically be provided with the water injection chamber in the flow distributor main part, the first water injection well choke that water injection chamber length direction removed can be followed to the fit of water injection intracavity, water injection chamber lateral wall still is equipped with first water inlet, first delivery port, first runner is constituteed to first water inlet, water injection chamber, first delivery port, through the size of the first effective flow area of first water injection well choke control. The utility model discloses the circulation latus rectum is big, can prevent to block up, water flow control range is wide, has characteristics high-efficient, reliable, that the durability is strong.
Description
Technical Field
The invention relates to the technical field of oil extraction in oil fields, in particular to a water injection structure for a water injection well of an offshore oil field.
Background
As the strategic position of the ocean in the world becomes more and more significant, the ocean economy has become the growth point of the world economy, and the important part of the ocean economy is the exploitation of offshore oil fields. Reinjection of water into oil reservoirs during oil production is an important way to supplement formation energy and improve recovery efficiency. In the process of mining, the difference of physical properties among layers is large, so that the difference of water injection pressure is large. Therefore, in the same water injection system, the difference of the water injection pressures of different water injection wells is large, so that throttling is needed to enable the pressure in the water injection wells to meet the use requirement. Most of existing offshore water injection systems control water injection flow by means of arranging water nozzles in sleeves and holes matched with the water nozzles, such as the novel patent CN207315323U, the recorded water injection system controls flow by controlling the size of gaps between the water nozzles and taper holes, the maximum circulation drift diameter is small, the water injection system is easy to block, and the water flow adjusting range is narrow.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned current offshore oil field water injection structure technical problem that blocks up easily, discharge control range is narrow, the utility model provides a water injection structure for offshore oil field water injection well, the circulation latus rectum is big, can prevent to block up, discharge control range is big, has high-efficient, reliable, the strong characteristics of durability.
The utility model discloses a following technical scheme realizes:
The utility model provides a water injection structure for offshore oil field water injection well, includes the flow distributor main part, vertically be provided with the water injection chamber in the flow distributor main part, the first water injection well choke that water injection chamber length direction removed can be followed to the fit of water injection intracavity, water injection chamber lateral wall still is equipped with first water inlet, first delivery port, first runner is constituteed to first water inlet, water injection chamber, first delivery port, through the size of the first effective flow area of first water injection well choke control.
Preferably, the water injection cavity is a closed cavity, the first water nozzle is provided with a first water nozzle balance channel, and the first water nozzle balance channel longitudinally penetrates through the first water nozzle.
Preferably, a filtering piece is arranged in the first water nozzle balance channel and used for filtering solid impurities in water flow.
Preferably, the side wall of the water injection cavity is further provided with a second water inlet and a second water outlet, and the second water inlet, the water injection cavity and the second water outlet form a second flow channel; the first runner and the second runner are divided into independent runners through the first water nozzle, one end of the first water nozzle is further connected with a second water nozzle which moves synchronously, a gap for water to flow through is reserved between the first water nozzle and the second water nozzle, the second water nozzle is matched with the water injection cavity, and the size of the effective flow area of the second water outlet is controlled by moving the second water nozzle.
Preferably, the water injection cavity position confined cavity, first water injection well choke is provided with first water injection well choke balanced passageway, first water injection well choke balanced passageway vertically runs through first water injection well choke, the second water injection well choke is provided with second water injection well choke balanced passageway, second water injection well choke balanced passageway vertically runs through the second water injection well choke, first water injection well choke balanced passageway, second water injection well choke balanced passageway constitution water injection well choke balanced passageway.
Preferably, a filtering piece is arranged in the first water nozzle balance channel and used for filtering solid impurities in water flow.
Preferably, the first water nozzle is driven by a screw rod mechanism.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. The water injection cavity is internally provided with a first water nozzle which can move along the length direction of the water injection cavity, and the size of the effective flow area of the first water outlet is controlled by moving the first water nozzle. Compared with the mode of adopting a water nozzle and a hole matched with the water nozzle to control the water injection flow, the moving direction of the water nozzle is vertical to the axis of an outlet, a large channel is formed, and the blockage can be prevented; the reliability and the durability are strong, the efficiency of oilfield water injection is improved, and the time of downhole construction is shortened. The water flow is continuously regulated by radially controlling the effective flow area of the water outlet, and the water flow regulation range is wide. Meanwhile, the caliber of the water outlet is the maximum circulation path, the circulation path is large, and the water injection flow is large.
2. The water injection cavity lateral wall still is equipped with second water inlet, second delivery port, and first water injection well choke one end still is connected with synchronous movement's second water injection well choke, through removing the size of second water injection well choke control second delivery port effective flow area. Thereby forming a double channel, realizing the control of the opening degree of the water outlet flow channel of the two water outlets of the water distributor by the double water nozzle heads, and realizing the more effective control of the injection flow.
3. the balance channel on the water nozzle head can balance the pressure at two ends of the water nozzle head, so that the water nozzle head can not be obstructed by the pressure difference formed by injected liquid and a stratum during moving and can not move easily.
4. be equipped with in the balanced passageway and filter the piece, silt in the balanced liquid of runner of accessible is strained, prevents that silt from getting into water injection well choke rear portion space, blocks up and destroys the structure.
Drawings
the accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention;
Fig. 3 is a schematic view of the use state of embodiment 2 of the present invention.
Reference numbers and corresponding part names in the drawings:
1-distributor body, 2-water injection cavity, 3-first water nozzle, 4-first water inlet, 5-first water outlet, 6-second water inlet, 7-second water outlet, 8-second water nozzle, 9-first water nozzle balance channel, 10-filter, 11-second water nozzle balance channel and 12-water nozzle balance channel.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
with reference to fig. 1, a water injection structure for a water injection well of an offshore oilfield comprises a flow distributor main body 1, and a water injection cavity 2 is longitudinally arranged in the flow distributor main body 1. The water injection cavity 2 is generally a cylindrical cavity for convenient processing, and can be a square or special-shaped cavity with equal section. The first water injection mouth 3 that can follow 2 length direction in water injection chamber and remove is adapted in the water injection chamber 2, and it can be understood that appearance, the size of first water injection mouth 3, with the inside shape of water injection chamber 2, size adaptation, and can follow the length direction removal in water injection chamber 2 under the drive of sharp driver. The linear driver for driving the first water nozzle 3 can be a pneumatic/hydraulic cylinder, an electric push rod, a motor-driven screw mechanism and the like; this embodiment adopts motor drive's screw mechanism, and output torque is big, can the displacement size of accurate control first water injection well choke 3. The 2 lateral walls in water injection chamber still are equipped with first water inlet 4, first delivery port 5, first water inlet 4, water injection chamber 2, first delivery port 5 constitute first runner, and the injection of rivers is flowed from first delivery port 5 behind water injection chamber 2 by first water inlet 4 promptly.
The size of the effective flow area of the first water outlet 5 is controlled by moving the first water nozzle 3. Specifically, the first water outlet 5 is located on a moving path of the first water nozzle 3, that is, the first water nozzle 3 moves in a radial direction of the first water outlet 5, so that the effective flow area of the first water outlet 5 can be controlled to change within a range from 0 to the maximum (the maximum is the caliber of the first water outlet 5) by moving the first water nozzle 3. Compared with the existing mode of axially adjusting the effective flow area of the water outlet by moving the water nozzle, the straight-through structure is adopted, so that the gap blocked by the silt is changed into a large channel, and the blocking of the flow channel by the silt is avoided. Therefore, the water flow and the flow are continuously regulated, the regulation range is large, the flow cross section is large, and the water flow and the flow are not easily blocked by particles, so that the adverse effects of poor sealing and the like are caused. In use, in order to ensure the accuracy of adjustment and the tightness when the water faucet is completely closed, sealing rings are usually arranged at two ends of the first water faucet 3 to realize dynamic sealing, and the distance between the two sealing rings should be greater than the diameter of the first water outlet 5. Note that, in order to ensure the sealing property when the first water outlet 5 is closed, there is no overlapping portion when the first water outlet 5 projects to the first water inlet 4.
Further, 2 confined cavitys in water injection chamber, first water injection well choke 3 is provided with first water injection well choke balanced passageway 9, first water injection well choke balanced passageway 9 vertically runs through first water injection well choke 3. That is, the first nozzle balance channel 9 is directly communicated with the motion space and the driving space at the tail part of the first nozzle 3 in the middle of the first nozzle 3. Set up like this for the both ends of first water injection well choke 3 all have rivers, so that 3 both ends pressure balance of first water injection well choke, can not obstructed and unable removal by the pressure differential that injected liquid and stratum formed when guaranteeing to remove. Preferably, a filtering piece 10 is arranged in the first water nozzle balance channel 9 and is used for filtering solid impurities in the water flow; prevent silt etc. to get into the space of first water injection well choke 3 afterbody, protect actuating mechanism. The filtering element 10 can be directly embedded into the first water nozzle balancing channel 9, or the first water nozzle 3 can be divided into two screwed parts, and the filtering element 10 is pressed between the two parts of the first water nozzle 3. On the one hand, the filter element 10 is easy to replace and, on the other hand, it is ensured that the filter element 10 cannot be flushed out in the event of high pressure.
Example 2
With reference to fig. 1 to 3, the present embodiment is optimized based on embodiment 1, and the detailed description of the repeated parts is omitted.
The utility model provides a water injection structure for offshore oil field water injection well, includes flow distributor main part 1, vertically be provided with water injection chamber 2 in the flow distributor main part 1, the first water injection well choke 3 that can follow 2 length direction in the water injection chamber 2 is fit for, 2 lateral walls in water injection chamber still are equipped with first water inlet 4, first delivery port 5, first water inlet 4, water injection chamber 2, first delivery port 5 constitute first runner, through the size of the first 5 effective flow area of first delivery port of 3 control of first water injection well choke.
On this basis, the lateral wall of the water injection cavity 2 is also provided with a second water inlet 6 and a second water outlet 7, and the second water inlet 6, the water injection cavity 2 and the second water outlet 7 form a second flow channel. The first runner and the second runner are divided into independent runners through the first water nozzle 3, namely, the first runner and the second runner are always kept in a non-communicated state, and therefore double-channel water injection is achieved. One end of the first water nozzle 3 is also connected with a second water nozzle 8 which moves synchronously, and it should be understood that the second water nozzle 8 is linked with the first water nozzle 3, and the linear driver can directly drive the first water nozzle 3 and also can directly drive the second water nozzle 8. And a gap for water to flow through is reserved between the first water nozzle 3 and the second water nozzle 8, so that water flow can flow from the second water inlet 6 to the second water outlet 7. The second water nozzle 8 is matched with the water injection cavity 2, and the size of the effective flow area of the second water outlet 7 is controlled by moving the second water nozzle 8. Therefore, the water injection well injects water through the matching of the first runner and the second runner, namely, the main runner and the auxiliary runner inject water. The superposed water outlet area of the two flow passages is far larger than that of a common water distributor, and because a straight-through structure is adopted, the gap blocked by the silt becomes a large passage, so that the blockage of the flow passages by the silt is avoided.
Similarly, the second water outlet 7 is located on the moving path of the second water nozzle 8, that is, the second water nozzle 8 moves in the radial direction of the second water outlet 7, so that the effective flow area of the second water outlet 7 can be controlled to change within the range from 0 to the maximum (the maximum is the caliber of the second water outlet 7) by moving the second water nozzle 8. It should be noted that the effective flow areas of the first water outlet 5 and the second water outlet 7 may be changed synchronously (according to the same distance that the first water nozzle 3 moves, the change rates of the effective flow areas of the first water outlet 5 and the second water outlet 7 are the same, and the change sizes are the same), or may be changed asynchronously (the change rates and the change sizes are different). When the synchronous change is carried out, the distance between the axis of the first water outlet 5 and the axis of the second water outlet 7 is equal to the distance between the head of the first water nozzle 3 and the head of the second water nozzle 8, the calibers of the first water outlet 5 and the second water outlet 7 are the same, and the opposite asynchronous change is different.
Further, 2 confined cavitys in water injection chamber, first water injection well choke 3 is provided with first water injection well choke balance channel 9, first water injection well choke balance channel 9 vertically runs through first water injection well choke 3, second water injection well choke 8 is provided with second water injection well choke balance channel 11, second water injection well choke balance channel 11 vertically runs through second water injection well choke 8, first water injection well choke balance channel 9, second water injection well choke balance channel 11 constitute water injection well choke balance channel 12. Therefore, water flow can flow into the tail space of the second water nozzle 8 through the head of the first water nozzle 3 through the water nozzle balance channel 12, namely the driving space and the stroke space, so that the pressure balance of the water nozzle head is ensured, and the first water nozzle 3 and the second water nozzle 8 do not need to be pushed against the water pressure to move. And a filtering piece 10 is arranged in the first water nozzle balance channel 12 and is used for filtering solid impurities in water flow. The filtering member 10 can be arranged in the first water nozzle balance channel 9, can be arranged in the second water nozzle balance channel 11, and is preferably arranged in the first water nozzle balance channel 9, so that the replacement and the cleaning are convenient.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A water injection structure for offshore oil field water injection well, includes flow distributor main part (1), its characterized in that: the utility model discloses a water injection flow distributor, including water injection chamber (2), water injection chamber (2) are vertically provided with in the flow distributor main part (1), the first water injection well choke (3) that can follow water injection chamber (2) length direction and remove are fit for in water injection chamber (2), water injection chamber (2) lateral wall still is equipped with first water inlet (4), first delivery port (5), first runner is constituteed in first water inlet (4), water injection chamber (2), first delivery port (5), through the size of removing first water injection well choke (3) control first delivery port (5) effective flow area.
2. The water injection structure for offshore oilfield water injection well according to claim 1, wherein: the water injection cavity (2) is a closed cavity, the first water nozzle (3) is provided with a first water nozzle balance channel (9), and the first water nozzle balance channel (9) longitudinally penetrates through the first water nozzle (3).
3. The water injection structure for offshore oilfield water injection well according to claim 2, wherein: and a filtering piece (10) is arranged in the first water nozzle balance channel (9) and is used for filtering solid impurities in water flow.
4. The water injection structure for offshore oilfield water injection well according to claim 1, wherein: a second water inlet (6) and a second water outlet (7) are further formed in the side wall of the water injection cavity (2), and a second flow channel is formed by the second water inlet (6), the water injection cavity (2) and the second water outlet (7); first runner, second runner are cut apart into independent runner through first water injection well choke (3), first water injection well choke (3) one end still is connected with synchronous movement's second water injection well choke (8), leave the space that supplies water to flow through between first water injection well choke (3) and second water injection well choke (8), second water injection well choke (8) and water injection chamber (2) adaptation are through the size of removing second water injection well choke (8) control second delivery port (7) effective flow area.
5. The water injection structure for offshore oilfield water injection well according to claim 4, wherein: the water injection cavity (2) is a closed cavity, the first water nozzle (3) is provided with a first water nozzle balance channel (9), the first water nozzle balance channel (9) vertically penetrates through the first water nozzle (3), the second water nozzle (8) is provided with a second water nozzle balance channel (11), the second water nozzle balance channel (11) vertically penetrates through the second water nozzle (8), and the first water nozzle balance channel (9) and the second water nozzle balance channel (11) form a water nozzle balance channel (12).
6. Water injection structure for offshore oilfield water injection wells according to claim 5, wherein: and a filtering piece (10) is arranged in the water nozzle balance channel (12) and is used for filtering solid impurities in water flow.
7. The water injection structure for offshore oilfield water injection wells according to any one of claims 1 to 6, wherein: the first water nozzle (3) is driven by a screw rod mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920571128.1U CN209780856U (en) | 2019-04-24 | 2019-04-24 | Water injection structure for offshore oilfield water injection well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920571128.1U CN209780856U (en) | 2019-04-24 | 2019-04-24 | Water injection structure for offshore oilfield water injection well |
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| CN209780856U true CN209780856U (en) | 2019-12-13 |
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| CN201920571128.1U Active CN209780856U (en) | 2019-04-24 | 2019-04-24 | Water injection structure for offshore oilfield water injection well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322042A (en) * | 2020-04-17 | 2020-06-23 | 四川省科学城久利电子有限责任公司 | Water distribution system for flow control and water injection measurement of first-level double strata of oil field |
| CN115680562A (en) * | 2021-07-28 | 2023-02-03 | 中国石油天然气股份有限公司 | Stepless precision regulating water tap structure and water distributor |
-
2019
- 2019-04-24 CN CN201920571128.1U patent/CN209780856U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322042A (en) * | 2020-04-17 | 2020-06-23 | 四川省科学城久利电子有限责任公司 | Water distribution system for flow control and water injection measurement of first-level double strata of oil field |
| CN115680562A (en) * | 2021-07-28 | 2023-02-03 | 中国石油天然气股份有限公司 | Stepless precision regulating water tap structure and water distributor |
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