CN202767928U - Strong negative pressure plug removal device used for oil-water well plug removal and injection stimulation - Google Patents
Strong negative pressure plug removal device used for oil-water well plug removal and injection stimulation Download PDFInfo
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- CN202767928U CN202767928U CN 201220471569 CN201220471569U CN202767928U CN 202767928 U CN202767928 U CN 202767928U CN 201220471569 CN201220471569 CN 201220471569 CN 201220471569 U CN201220471569 U CN 201220471569U CN 202767928 U CN202767928 U CN 202767928U
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- oil
- negative pressure
- plug removal
- strong negative
- water well
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Abstract
A strong negative pressure plug removal device used for oil-water well plug removal and injection stimulation comprises a central pipe, a plurality of sealing tubes, a starting piston and a connecting sleeve. An upper connecting head is connected with the upper end of the central pipe, a lower connecting head is connected with the lower end of the central pipe, a pressure guiding hole is formed in the central hole, and a limiting bulge loop above the pressure guiding hole is arranged in the outer pipe wall of the central pipe. The plurality of sealing tubes are arranged on the central pipe in a sealed and sleeved mode, the upper ends of the sealing tubes are abutted against the upper connecting head, and the lower ends of the sealing tubes are arranged above the limiting bulge loop. The starting piston is arranged on the central pipe in an axial movement mode and in a sleeved mode, the upper end of the starting piston is abutted against the plurality of sealing tubes, the lower end is connected with the lower connecting head through a hydraulic cylinder which is communicated with the pressure guiding hole. The connecting sleeve is connected between the starting piston and the hydraulic cylinder and provided with a limiting groove. Under the status that the connecting sleeve moves up and down along the axial direction, the limiting groove is arranged in the lower end of the limiting bulge loop in a clamping mode. The strong negative pressure plug removal device used for the oil-water well plug removal and injection stimulation is capable of being connected with an oil pipe, sliding with a sleeve pipe in a sealing mode, achieving process of negative pressure suction and water attack vibration, and achieving plug removal of an oil layer.
Description
Technical field
The utility model is relevant for a kind of strong negative pressure deblocking device, especially relevant for a kind of strong negative pressure deblocking device for the plug removal in oil and water well augmented injection.
Background technology
At present, in the exploitation in oil field, oil reservoir is subject to various pollutions and blockage problem inevitably, and de-plugging process is the important measures that solution oil layer pollution, realization oil gas field increase production and improve productivity.The de-plugging mode is varied, and negative pressure deblocking is one of de-plugging mode of commonly using.
Existing negative pressure deblocking method has the liquid jet of employing to form negative pressure, has the suction of the forced-ventilated of employing pump to form the methods such as negative pressure.Wherein, the structure of forced-ventilated pump negative pressure suction plug-removing device is relatively complicated, and work progress is wayward; The liquid negative pressure plug-removing device is mainly by central tube be set in respectively a plurality of sealing drums on the central tube and start piston component and form, it is by perfusion fluid in central tube, when fluid pressure reaches certain value, trigger and start piston component, and then promote a plurality of sealing drum axial compression, sealing drum radially outward expands, with Seal Oil cover annular space.Although the structure of existing liquid negative pressure plug-removing device is simple, it also has the following disadvantages, and haves much room for improvement:
1) this liquid negative pressure plug-removing device is by a plurality of sealing drum Seal Oil cover annular spaces, a plurality of sealing drums are after sealing, close contact between the periphery wall of sealing drum and the inside wall of sleeve pipe and have larger frictional force, sealing drum relatively sleeve pipe moves axially, therefore, existing liquid negative pressure plug-removing device can't realize following the compound mechanical actions such as water attack vibration, and plugging removal effect is subject to certain restrictions.
2) close contact between the outer tube wall of the inner surface of sealing drum and central tube, between the two without any slit, after the sealing drum that elastomeric material is made is compressed, the external surface of sealing drum is extruded and expands outwardly, its inner surface is out of shape immediately and produces unnecessary extrusion stress, cause the sealing drum bulk strength not high, the abrasion resistance performance is bad.
Therefore, be necessary to provide a kind of novel strong negative pressure deblocking device, overcome defects.
The utility model content
The purpose of this utility model provides a kind of strong negative pressure deblocking device for the plug removal in oil and water well augmented injection, it is connected with oil pipe and can produces effective slipper seal with sleeve pipe, this strong negative pressure deblocking device can be with tubing reciprocation, finish negative pressure suction and the physical process that water attack shakes, realize the de-plugging of oil reservoir.
Above-mentioned purpose of the present utility model can adopt following technical proposal to realize:
The utility model provides a kind of strong negative pressure deblocking device for the plug removal in oil and water well augmented injection, and described strong negative pressure deblocking device for the plug removal in oil and water well augmented injection comprises:
Central tube, its upper end is connected with top connection, and its lower end is connected with lower contact, offers pressure guide hole on the described central tube, is provided with position limiting convex ring at the outer tube wall of described central tube, and described position limiting convex ring is positioned at the top of described pressure guide hole;
A plurality of sealing drums, its sealing shroud are located on the outer tube wall of described central tube, and the upper end of described a plurality of sealing drums and described top connection offset, and its lower end is positioned at the top of described position limiting convex ring;
Start piston, it can be set on the described central tube with moving axially, and the upper end of described startup piston and described a plurality of sealing drum offset, and its lower end links to each other with described lower contact by fluid cylinder, and described pressure guide hole is connected with described fluid cylinder;
Adapter sleeve, it is connected between described startup piston and the described fluid cylinder, and described adapter sleeve has stopper slot, and under the state that described adapter sleeve axially moves up, described stopper slot is fastened on the lower end of described position limiting convex ring.
In preferred embodiment, described fluid cylinder is connected in the described lower contact by shear pin.
In preferred embodiment, described fluid cylinder inside wall is provided with the card tooth, and the lateral wall of described lower contact is provided with jump ring, is fastened at described stopper slot under the state of described position limiting convex ring lower end, and described card tooth is arranged in described jump ring.
In preferred embodiment, described sealing drum by rubber ring and respectively the metal ring of bonding by Vulcanization at described rubber ring two ends form.
In preferred embodiment, the internal ring wall of described rubber ring is provided with ring groove.
In preferred embodiment, between described startup piston and the described adapter sleeve, between described startup piston and the described central tube, between described adapter sleeve and the described fluid cylinder and be respectively equipped with a plurality of O RunddichtringOs between described fluid cylinder and the described lower contact.
In preferred embodiment, between described a plurality of sealing drums and described top connection, be provided with adjustable ring.
Characteristics and the advantage of the strong negative pressure deblocking device for the plug removal in oil and water well augmented injection of the present utility model are:
One, the strong negative pressure deblocking device for the plug removal in oil and water well augmented injection of the present utility model, the position limiting convex ring that is arranged on the central tube can limit the distance that the startup the axis of the piston upwards moves, move distance on the piston too much and a plurality of sealing drums of excessive compression to avoid starting, cause the sealing drum excessive expansion, and frictional force is excessive between the sleeve pipe inside wall, can not finish the purpose that moves up and down with central tube; In addition, because position limiting convex ring has effectively limited the distance of a plurality of sealing drum expanded radiallys, produce at most the magnitude of interference of 2-3mm between the inside wall of a plurality of sealing drums and sleeve pipe, so both played sealing function, again not can and sleeve pipe between produce excessive frictional force, in the process of strong negative pressure suction, a plurality of sealing drums move and move down on can be coaxial with central tube one, and can be all the time and keep good slipper seal state between the sleeve pipe, effectively realized the de-plugging of oil reservoir.
Two, the strong negative pressure deblocking device for the plug removal in oil and water well augmented injection of the present utility model, adopting the middle part is that the rubber two ends are metal sealing drum, its bulk strength is higher, and has improved the anti-wear performance of sealing drum.The internal ring wall of the rubber ring of sealing drum is provided with ring groove, this ring groove is crescent, after the rubber segments of sealing drum is compressed, the external annulus of rubber ring is extruded and expands outwardly, its internal ring wall is out of shape to fill whole crescent ring groove, sealing drum does not produce or only produces the remaining extrusion stress that reduces a lot, the application life of effectively having improved sealing drum.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the sectional view of the strong negative pressure deblocking device for the plug removal in oil and water well augmented injection of the present utility model.
The specific embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, the utility model provides a kind of strong negative pressure deblocking device for the plug removal in oil and water well augmented injection, and it comprises central tube 1, a plurality of sealing drum 2, starts piston 3 and adapter sleeve 4.Wherein: the upper end of central tube 1 is connected with top connection 11, and its lower end is connected with lower contact 12, offers pressure guide hole 13 on the described central tube 1, is provided with position limiting convex ring 14 at the outer tube wall of described central tube 1, and described position limiting convex ring 14 is positioned at the top of described pressure guide hole 13; A plurality of sealing drum 2 sealing shrouds are located on the outer tube wall of described central tube 1, and the upper end of described a plurality of sealing drums 2 and described top connection 11 offset, and its lower end is positioned at the top of described position limiting convex ring 14; Start piston 3 and can be set on the described central tube 1 with moving axially, the upper end of described startup piston 3 and described a plurality of sealing drum 2 offset, and its lower end links to each other with described lower contact 12 by fluid cylinder 5, and described pressure guide hole 13 is connected with described fluid cylinder 5; Adapter sleeve 4 is connected between described startup piston 3 and the described fluid cylinder 5, and described adapter sleeve 4 has stopper slot 41, and under the state that described adapter sleeve 4 axially moves up, described stopper slot 41 is fastened on the lower end of described position limiting convex ring 14.
Specifically, the lower end of top connection 11 has internal thread segment, and the upper end of central tube 1 has external thread section, and top connection 11 is threaded in the internal thread segment of its lower end on the external thread section of central tube 1 upper end and is connected on the central tube 1; The upper end of lower contact 12 has internal thread segment, and the lower end of central tube 1 has external thread section, and lower contact 12 is threaded on the external thread section of central tube 1 lower end with the internal thread segment of its upper end and is connected on the central tube 1.
Central tube 1 in axial direction offers centre bore 15, and pressure guide hole 13 is opened on the middle part tube wall of central tube 1, and pressure guide hole 13 is connected with the centre bore 15 of central tube 1; Position limiting convex ring 14 radially outward is convexly equipped with on central tube 1 outer tube wall that is positioned at above the pressure guide hole 13; It is circular that sealing drum 2 is substantially, a plurality of sealing drum 2 sealing shrouds are located on the outer tube wall of central tube 1 and between top connection 11 and position limiting convex ring 14, in the present embodiment, outer tube wall at central tube 1 is arranged with three sealing drums 2, certainly, in other embodiments, salable sheathed for example two or more sealing drum 2 on the outer tube wall of central tube 1 are not restricted at this yet.In the utility model, also be provided with adjustable ring 6 between described a plurality of sealing drums 2 and the described top connection 11, adjustable ring 6 is used for the upper end of a plurality of sealing drums 2 is carried out spacing, so that a plurality of sealing drum 2 prevents that sealing drum 2 from axially moving up when compression.
Start piston 3 and substantially be circular, it is set in, and also contact is in the lower end of a plurality of sealing drums 2 on the central tube 1, and the interior ring diameter that starts piston 3 is a bit larger tham the external diameter of central tube 1, and it can move axially along central tube 1.
The upper end that is used for the strong negative pressure deblocking device of plug removal in oil and water well augmented injection is connected to the lower end of oil pipe by top connection 11, and its lower end links to each other with ball-and-seat by lower contact 12.This strong negative pressure deblocking device is when carrying out strong negative pressure deblocking, at first, perfusion fluid in from well head to oil pipe, liquid flows in the central tube 1 along oil pipe, because ball-and-seat is in closed condition, this moment, liquid can be gathered in the central tube 1, along with being on the increase of liquid, when the liquid level of the liquid in the central tube 1 arrives the position of pressure guide hole 13, liquid flows in the stopper slot 41 of adapter sleeve 4 from pressure guide hole 13, and then along in the annular space between the inflow fluid cylinder 5 of the slit between the lower connecting portion 43 of central tube 1 and adapter sleeve 4 and the central tube 1, continue to central tube 1 interior filling liquid this moment, liquid in the stopper slot 41 is on the increase, until be full of whole stopper slot 41, increase along with liquid hydraulic pressure, liquid hydraulic pressure in the stopper slot 41 also constantly increases, start piston 3 and under the effect of fluid pressure, produce the mobile trend that axially makes progress, after fluid pressure that contact is starting piston 3 lower surfaces reaches certain value, the shear pin 7 that is connected between fluid cylinder 5 and the lower contact 12 is cut off, at this moment, starting piston 3 drive adapter sleeves 4 and fluid cylinder 5 axially moves up along central tube 1, a plurality of sealing drums 2 are under the squeezing action that starts piston 3, axial compression and radially outward expanse are with Seal Oil cover annular space.When adapter sleeve 4 axially upwards is moved to the lower end of position limiting convex ring 14, stopper slot 41 contacts are on position limiting convex ring 14, starting piston 3 can not move up again, being arranged on card tooth 51 on fluid cylinder 5 inside walls this moment can be fastened in the jump ring 121 on lower contact 12 lateral walls, thereby will start piston 3, adapter sleeve 4 and fluid cylinder 5 and be fixed on the sealing state, like this after stopping liquid being suppressed, start the travelling backwards of can not falling of piston 3, adapter sleeve 4 and fluid cylinder 5, to keep the sealing state of 2 pairs of oil jacket annular spaces of a plurality of sealing drums.
After sealing between strong negative pressure deblocking device of the present utility model and the sleeve pipe, release the pressure in the oil pipe, the frequency of setting according to external equipment and stroke be handling oil pipe repeatedly up and down, central tube 1 and on a plurality of sealing drums 2 with together upper and lower displacement of oil pipe, in the process of oil pipe up stroke, produce strong negative pressure suction effect, in the process of oil pipe down stroke, produce the water attack vibrating effect, this strong negative pressure deblocking device is in the strong negative pressure deblocking technique of finishing through the repeatedly suction of tens times or up to a hundred times oil well.
Strong negative pressure deblocking device for the plug removal in oil and water well augmented injection of the present utility model, being arranged on position limiting convex ring 14 on the central tube 1 can limit and start the distance that piston 3 moves on axially, move distance on the piston 3 too much and a plurality of sealing drums 2 of excessive compression to avoid starting, cause sealing drum 2 excessive expansions, and and between the sleeve pipe inside wall frictional force excessive, can not finish the purpose that moves up and down with central tube 1; In addition, because position limiting convex ring 14 has limited the distance of a plurality of sealing drum 2 expanded radiallys effectively, so that produce at most the magnitude of interference of 2～3mm between the inside wall of a plurality of sealing drums 2 and sleeve pipe, so both played sealing function, again not can and sleeve pipe between produce excessive frictional force, in the process of strong negative pressure suction, a plurality of sealing drums 2 move and move down on can be coaxial with central tube 1 one, and can be all the time and keep good slipper seal state between the sleeve pipe, effectively realized the de-plugging of oil reservoir.
According to an embodiment of the present utility model, described sealing drum 2 by rubber ring 21 and respectively the metal ring 22 of bonding by Vulcanization at described rubber ring 21 two ends form.Adopting the middle part is that the rubber two ends are metal sealing drum 2, and its bulk strength is higher, and has improved the overall wear resistance energy of sealing drum 2.Further, on the internal ring wall of sealing drum 2 rubber rings 21, also be provided with ring groove 211, this ring groove 211 is crescent, after the rubber segments of sealing drum 2 is compressed, the external annulus of rubber ring 21 is extruded radially outward expansion, and its internal ring wall is out of shape to fill whole crescent ring groove 211, therefore, sealing drum 2 does not produce or only produces the remaining extrusion stress that reduces a lot, the application life of effectively having improved sealing drum 2.
According to an embodiment of the present utility model, between described startup piston 3 and the described adapter sleeve 4, between described startup piston 3 and the described central tube 1, between described adapter sleeve 4 and the described fluid cylinder 5 and be respectively equipped with a plurality of O RunddichtringOs 8 between described fluid cylinder 5 and the described lower contact 12.Those O RunddichtringOs 8 are used for center seal pipe 1 and start piston 3, start piston 3 and adapter sleeve 4, adapter sleeve 4 and fluid cylinder 5 and fluid cylinder 5 and lower contact 12, so that strong negative pressure deblocking device for the plug removal in oil and water well augmented injection of the present utility model has good sealing performance.
The above only is several embodiment of the present utility model, and those skilled in the art can carry out various changes or modification to the utility model embodiment according to the disclosed content of application documents and not break away from spirit and scope of the present utility model.
Claims (7)
1. strong negative pressure deblocking device that is used for the plug removal in oil and water well augmented injection is characterized in that described strong negative pressure deblocking device for the plug removal in oil and water well augmented injection comprises:
Central tube, its upper end is connected with top connection, and its lower end is connected with lower contact, offers pressure guide hole on the described central tube, is provided with position limiting convex ring at the outer tube wall of described central tube, and described position limiting convex ring is positioned at the top of described pressure guide hole;
A plurality of sealing drums, its sealing shroud are located on the outer tube wall of described central tube, and the upper end of described a plurality of sealing drums and described top connection offset, and its lower end is positioned at the top of described position limiting convex ring;
Start piston, it can be set on the described central tube with moving axially, and the upper end of described startup piston and described a plurality of sealing drum offset, and its lower end links to each other with described lower contact by fluid cylinder, and described pressure guide hole is connected with described fluid cylinder;
Adapter sleeve, it is connected between described startup piston and the described fluid cylinder, and described adapter sleeve has stopper slot, and under the state that described adapter sleeve axially moves up, described stopper slot is fastened on the lower end of described position limiting convex ring.
2. the strong negative pressure deblocking device for the plug removal in oil and water well augmented injection as claimed in claim 1 is characterized in that described fluid cylinder is connected in the described lower contact by shear pin.
3. the strong negative pressure deblocking device for the plug removal in oil and water well augmented injection as claimed in claim 2, it is characterized in that, described fluid cylinder inside wall is provided with the card tooth, the lateral wall of described lower contact is provided with jump ring, be fastened at described stopper slot under the state of described position limiting convex ring lower end, described card tooth is arranged in described jump ring.
4. the strong negative pressure deblocking device for the plug removal in oil and water well augmented injection as claimed in claim 1 is characterized in that, described sealing drum by rubber ring and respectively the metal ring of bonding by Vulcanization at described rubber ring two ends form.
5. the strong negative pressure deblocking device for the plug removal in oil and water well augmented injection as claimed in claim 4 is characterized in that the internal ring wall of described rubber ring is provided with ring groove.
6. the strong negative pressure deblocking device for the plug removal in oil and water well augmented injection as claimed in claim 1, it is characterized in that, between described startup piston and the described adapter sleeve, between described startup piston and the described central tube, between described adapter sleeve and the described fluid cylinder and be respectively equipped with a plurality of O RunddichtringOs between described fluid cylinder and the described lower contact.
7. the strong negative pressure deblocking device for the plug removal in oil and water well augmented injection as claimed in claim 1 is characterized in that, is provided with adjustable ring between described a plurality of sealing drums and described top connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220471569 CN202767928U (en) | 2012-09-14 | 2012-09-14 | Strong negative pressure plug removal device used for oil-water well plug removal and injection stimulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220471569 CN202767928U (en) | 2012-09-14 | 2012-09-14 | Strong negative pressure plug removal device used for oil-water well plug removal and injection stimulation |
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| Publication Number | Publication Date |
|---|---|
| CN202767928U true CN202767928U (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220471569 Expired - Fee Related CN202767928U (en) | 2012-09-14 | 2012-09-14 | Strong negative pressure plug removal device used for oil-water well plug removal and injection stimulation |
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| CN (1) | CN202767928U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317399A (en) * | 2014-07-23 | 2016-02-10 | 中国石油天然气股份有限公司勘探开发研究院 | Pulse valve used for oil pipe blockage removing |
| CN115341882A (en) * | 2021-05-14 | 2022-11-15 | 中国石油天然气集团有限公司 | Hydraulic oscillation-chemical blockage removal and injection increase method |
| CN117536590A (en) * | 2023-12-07 | 2024-02-09 | 盐城市弘通石油机械有限公司 | Bridge type concentric water distributor |
-
2012
- 2012-09-14 CN CN 201220471569 patent/CN202767928U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317399A (en) * | 2014-07-23 | 2016-02-10 | 中国石油天然气股份有限公司勘探开发研究院 | Pulse valve used for oil pipe blockage removing |
| CN115341882A (en) * | 2021-05-14 | 2022-11-15 | 中国石油天然气集团有限公司 | Hydraulic oscillation-chemical blockage removal and injection increase method |
| CN115341882B (en) * | 2021-05-14 | 2023-10-20 | 中国石油天然气集团有限公司 | Hydraulic oscillation-chemical blocking removal and injection enhancement method |
| CN117536590A (en) * | 2023-12-07 | 2024-02-09 | 盐城市弘通石油机械有限公司 | Bridge type concentric water distributor |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20130914 |