CN204163691U - Three ball seat sealed type pit shaft stop valves - Google Patents
Three ball seat sealed type pit shaft stop valves Download PDFInfo
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- CN204163691U CN204163691U CN201420333851.3U CN201420333851U CN204163691U CN 204163691 U CN204163691 U CN 204163691U CN 201420333851 U CN201420333851 U CN 201420333851U CN 204163691 U CN204163691 U CN 204163691U
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- flow channels
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- pit shaft
- ball seat
- stop valves
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Abstract
A kind of three ball seat sealed type pit shaft stop valves, comprise valve body and valve seat, described valve seat is positioned at the cavity of valve body, and slides in valve body under the promotion of fluid and setting, and described valve body is by top connection and lower contact is dismantled and assembled is connected to form, and junction seals; Described valve seat is piston; Described piston has the first flow channels, the second flow channels and the 3rd flow channels, described first flow channels, the second flow channels and the 3rd flow channels entrance are provided with as each ball moves to the transition part that respective set position plays guide function; Center distribution in equilateral triangle on piston section of described first flow channels, described second flow channels and described 3rd flow channels longitudinal section.This stop valve provides possibility by the three ball seat envelopes of changing into of the form of structure to ball seat, increases area of passage, prevents setting in advance.Staged Fracturing Technique In Horizontal Wells can be widely used in.
Description
Technical field
The utility model relates to the pit shaft stop valve in the construction of a kind of staged fracturing of horizontal well, particularly relates to a kind of pit shaft stop valve having three setting runners.
Background technology
At present, Staged Fracturing Technique In Horizontal Wells is more and more applied in low permeability reservoir measures to reform, to increase oil gas field output.The working string bottom of this technique needs a kind of instrument to meet following job execution requirement, to enter under comprising tubing string in process liquid by, can build the pressure by closing passage when tubing string arrives after designated depth.The type instrument of existing oil gas field application possesses above two primary conditions, but there is a lot of defect in actual use, such as area of passage is little, the effect of damming cause in advance setting, structure design is unreasonable, processing and mounting or dismounting maintenance difficulties is large, the complicated deficient in stability of sealing locking mechanism etc., these defects even limit the development of whole construction technology, are therefore necessary again to research and develop this instrument.
The stop valve of prior art only has a flowing hole, and by pitching size restrictions, area of passage is little, strictly need limit discharge capacity for slurry process, otherwise can cause setting in advance because of the effect of damming; Sealing locking mechanism design is complicated, forces into groove grappling or metal claw grappling etc., because of material or the unreasonable poor stability that causes of shape as adopted extruding rubber parts; Although existing stop valve can meet the most basic demand of use in overall construction design, but but do not take into account dismounting and safeguard convenience, such as integrated cylinder type design, remaining parts all needs to stretch in hole installs or adopts lengthy and tedious too much Element Design, adds unnecessary operating time and difficulty.
Utility model content
The utility model relates to a kind of three ball seat sealed type pit shaft stop valves, its objective is by the form of structure to ball seat change into three ball seats envelope possibility is provided, increase area of passage, prevent setting in advance.
Another object is, by the change to valve body connected mode, increases the convenience of mounting or dismounting.
In order to realize above-mentioned utility model object, the technical scheme that the utility model is taked is as follows:
A kind of three ball seat sealed type pit shaft stop valves, comprise valve body and valve seat, described valve seat is positioned at the cavity of valve body, and slides in valve body under the promotion of fluid and setting, wherein,
Described valve body is by top connection and lower contact is dismantled and assembled is connected to form, and junction seals;
Described valve seat is piston; Described piston has the first flow channels, the second flow channels and the 3rd flow channels, described first flow channels, the second flow channels and the 3rd flow channels entrance are provided with as each ball moves to the transition part that respective set position plays guide function; Center distribution in equilateral triangle on piston section of described first flow channels, described second flow channels and described 3rd flow channels longitudinal section.
Preferably, described piston comprises piston body and piston rod, described piston body and top connection be connected by shear pin and with top connection movable sealing; Described piston body there is the retaining ring opened when being embedded with setting; When described piston rod has setting and the hermetically-sealed construction that seals of lower contact.
Preferably, described transition part comprises first step, second step, the 3rd step;
Described first step is by the upper surface of piston body and described first flow channels, the anchor ring that formed between described second flow channels and described 3rd flow channels entrance face;
Described second step is be positioned at the arc block bottom adjacent two flow channels;
Described 3rd step is the trapezoid block between adjacent two flow channels, the side of described trapezoid block for flow channels wall continuous print arcwall face corresponding to it.
Preferably, described 3rd step and described first flow channels, described second flow channels and described 3rd flow channels entrance face junction are provided with the chamfered transition face sealed when having setting.
Preferably, described first flow channels, described second flow channels and described 3rd flow channels include horizontal segment and oblique section;
Described horizontal segment is positioned at piston body, and described horizontal segment is parallel to piston centreline and arranges;
Described oblique section is arranged on piston body and piston rod junction, and the intersection point of described oblique section of center line is positioned on the center line of piston.
Preferably, described top connection is connected with lower contact box and pin, has the box and the first shoulder that are connected with top downhole tool in described top connection;
Have the second shoulder and sealing drum in described lower contact, there is the pin thread be connected with bottom downhole tool described sealing drum bottom;
The lower surface of described second shoulder and top connection forms the axial location groove of described retaining ring.
Preferably, described first shoulder and described piston body matched in clearance; Described sealing drum and described piston rod matched in clearance.
Preferably, there is the assembling duct of installing bottom downhole tool the lower end of described lower contact.
Compared to the prior art the utility model, has following beneficial effect:
This stop valve possesses enough large conveyance capacity and ensures to carry out smoothly for slurry and pitching operation, and it is setting in advance that the effect of damming avoiding a flow channels causes; This stop valve structure simplicity of design is reasonable, is not only more suitable for processing and manufacturing, and does not need extra frock in mounting or dismounting maintenance process, simple to operate; The design of this stop valve seal-locking mechanism is ingenious, and ensures reliable and stable.
Install shear pin after piston is connected with top connection, then connect lower contact, installation process avoids narrow space to operate, simple and convenient; As long as this stop valve first backs out lower contact in unloading process, other parts are pulled down successively, there is not the situation need destroyed retaining mechanism and could dismantle.
After this stop valve pitching builds the pressure, descent of piston enters sealing drum to lower contact, and the retaining ring simultaneously on piston enters distending lock piston position after groove, and wherein, sealing mechanism has double seal circle to ensure, designs ingenious and all substantially increases stability.
Accompanying drawing explanation
Fig. 1 is three ball pit shaft stop valve assembling drawings.
Fig. 2 is the A place enlarged drawing of Fig. 1.
Fig. 3 is that low-density ball seat is honored as a queen position view.
Fig. 4 is the sectional side elevation of the three-dimensional assembling drawing of three ball pit shaft stop valves.
Fig. 5 is the axis of the piston mapping of three ball pit shaft stop valves.
Fig. 6 is the flow channels distribution schematic diagram of three ball pit shaft stop valves.
Reference numeral: 1-top connection, 2-sealing ring a, 3-shear pin, 4-retaining ring, 5-sealing ring b, 6-piston, 601-piston body, 602-piston rod, 7-sealing ring c, 8-lower contact, 9-first flow channels, 10-first low-density ball, 11-second flow channels, 12-the 3rd flow channels, 13-the 3rd low-density ball, 14-shear pin groove, 15-retaining ring mounting groove, 16-box, 17-pin thread, 18-first step, 19-second step, 20-first shoulder, 21-second shoulder, 22-sealing drum, 23-assembles duct, 24-the 3rd step, 25-arcwall face, 26-chamfered transition face.
Detailed description of the invention
Clearly understand for making utility model object of the present utility model, technical scheme and beneficial effect, below in conjunction with accompanying drawing, embodiment of the present utility model is described, it should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can be combined mutually.
Set forth below in conjunction with Fig. 1 to Fig. 6, a kind of three ball seat sealed type pit shaft stop valves, comprise valve body and valve seat, described valve seat is positioned at the cavity of valve body, and under the promotion of fluid in valve body slide and setting, wherein, described valve body is by top connection 1 and lower contact 8 is dismantled and assembled is connected to form, and junction seals; In the present embodiment, described valve body is connected to form by top connection 1 and lower contact 8 box and pin, and box and pin junction seals by arranging the two seals circle a2 being embedded in top connection 1 external surface;
Described valve seat is piston 6; Described piston 6 has the first flow channels 9, second flow channels 11 and the 3rd flow channels 12, described first flow channels 9, second flow channels 11 and the 3rd flow channels 12 entrance are provided with as each ball moves to the transition part that respective set position plays guide function; When rear setting ball moves to flow channels entry position, setting ball forms the guiding channel that rear setting ball moves to its set position together with described transition part.
See Fig. 1, described piston 6 comprises piston body 601 and piston rod 602, described piston body 601 and top connection 1 be connected by shear pin 3 and with top connection 1 movable sealing; Described piston body 601 there is the retaining ring 4 opened when being embedded with setting; When described piston rod 602 has setting and the hermetically-sealed construction that seals of lower contact 8.Hermetically-sealed construction herein arranges two seals circle c7 for being arranged on piston body 602 face of cylinder.Described piston body 601 and piston rod 602 are integrated part.
See Fig. 1 and Fig. 4, described top connection 1 is connected with lower contact 8 box and pin, described top connection 1
Inside there are the box 16 and the first shoulder 20 that are connected with top downhole tool;
Have the second shoulder 21 and sealing drum 22 in described lower contact 8, there is the pin thread 17 be connected with bottom downhole tool described sealing drum 22 bottom;
The lower surface of described second shoulder 21 and top connection 1 forms the axial location groove of described retaining ring 4.
Realize smoothly sliding to lower contact 8 from top connection 1 to realize piston 6, and remain sealing state in sliding process, the diameter of described first shoulder 20 is more bigger than the diameter of piston body 601, is matched in clearance between the two; The diameter of described sealing drum 22 is more bigger than the diameter of piston rod 602, is matched in clearance between the two.
See Fig. 4, there is the assembling duct 23 matched with bottom downhole tool the lower end of described lower contact 8, and diameter self-sealing cylinder 22 to lower contact 8 lower surface in described assembling duct 23 increases gradually.
As shown in Figure 6, the center of described first flow channels 9, described second flow channels 11 and described 3rd flow channels 12 longitudinal section distribution in equilateral triangle on piston section.
See Fig. 4 and Fig. 5, described transition part comprises first step 18, second step 19, the 3rd step 24; The quantity of described transition part is equal with the quantity of flow channels.
Described first step 18 is by the upper surface of piston body 601 and described first flow channels 9, the anchor ring that formed between described second flow channels 11 and described 3rd flow channels 12 entrance face;
Described second step 19 is for being positioned at the arc block bottom adjacent two flow channels;
Described 3rd step 24 is the trapezoid block between adjacent two flow channels, the side of described trapezoid block for flow channels wall continuous print arcwall face 25 corresponding to it.
Described first flow channels 9, described second flow channels 11 and described 3rd flow channels 12 include horizontal segment and oblique section;
Described horizontal segment is positioned at piston body, and described horizontal segment is parallel to piston centreline and arranges;
Described oblique section is arranged on piston body and piston rod junction, and the intersection point of described oblique section of center line is positioned on the center line of piston.(not shown herein)
See Fig. 2, described 3rd step 24 is provided with described first flow channels 9, described second flow channels 11 and described 3rd flow channels 12 entrance face junction the chamfered transition face 26 sealed when having setting.
The process of three low-density ball seat envelopes is as follows: the first low-density ball 10 is under the promotion of fluid, be positioned at first step 18, second step 19, the 3rd step 24 bottom the first flow channels 9 and the second flow channels 11 successively, it is setting to enter the first flow channels 9, second low-density ball enters and second flow channels 11 of the first flow channels 9 in same level position according to the mode identical with the first low-density ball 10, 3rd low-density ball 13 is under the promotion of fluid, the first step 18 bottom the first flow channels 9 and the second flow channels 11 is positioned at successively, second step 19, 3rd step 24, and under the thrust of fluid, on to the first low-density ball 10 and the second low-density ball top, and enter the 3rd flow channels 12 (the first setting low-density ball 10 herein under the clamping action of the transition part formed at the three grades of steps being positioned at the first flow channels 9 and the second flow channels 11 side, second low-density ball and the transition part corresponding with the 3rd flow channels 12 refer to that three grades of steps of the first flow channels 9 and the second flow channels 11 side form the guiding channel jointly forming rear setting ball---the 3rd low-density ball 13 moves to its set position---the 3rd flow channels 12 entrance herein).
Structure sectional view after above-mentioned three ball seat sealed type pit shaft stop valves are setting is see Fig. 3, setting procedure is as follows: when oil gas field horizontal fragmentation pressing crack construction, the top connection 1 of three ball seat sealed type pit shaft stop valves is connected with pressure reduction sliding sleeve, and lower contact 8 is connected with float collar float plug.During setting operation, three the low-density balls matched with flow channels in piston 6 are dropped into successively from well head, after three low-density balls enter respective flow channels successively, the fluid passage of shutoff between top connection 1 and piston 6, when pressure reduction reach shear pin 3 cut off pressure time, shear pin 3 is cut off to depart from top connection 1, and piston 6 slides to lower contact 8 from top connection 1, in sliding process, formed all the time and top connection 1 movable sealing by being embedded in piston body 601 Shang tetra-road sealing ring b5.Described piston body 601 external cylindrical surface sets gradually two seals circle b5, shear pin groove 14, retaining ring mounting groove 15, two seals circle b5 from top to bottom.When fluid forces piston 6 slides into lower contact 8, retaining ring 4 flicks, the position of fixed piston 6.Avoid piston 6 to move to top connection 1, now, whole valve seat (piston 6) passage is by shutoff.
The installation process of above-mentioned three ball seat sealed type pit shaft stop valves is as follows:
One, each component of cleaning lubrication, and sealing ring a2, sealing ring b5 and sealing ring c7 are installed;
Two, live with hand in mounting groove reserved on the piston body 601 retaining ring 4 being enclosed within piston 6, piston 6 entirety to be inserted in the lower end endoporus of top connection 1 until aim at the installation site of shear pin 3;
Three, shear pin 3 is installed;
Four, lower contact 8 is connected to the lower end of top connection 1.
The unloading process of above-mentioned three ball seat sealed type pit shaft stop valves is as follows:
One, lower contact 8 is backed out from top connection 1 lower end;
Two, take off the retaining ring 4 on piston 6, and extract piston 6 from top connection 1 lower end;
Three, take off all sealing rings and shear pin 3, clean and lubricate each component.
Although the embodiment that the utility model discloses as above, the embodiment that its content just adopts for the ease of understanding the technical solution of the utility model, is not intended to limit the utility model.Technician in any the utility model art; under the prerequisite not departing from the core technology scheme that the utility model discloses; any amendment and change can be made in the form implemented and details; but the protection domain that the utility model limits, the scope that still must limit with appending claims is as the criterion.
Claims (8)
1. three ball seat sealed type pit shaft stop valves, comprise valve body and valve seat, described valve seat is positioned at the cavity of valve body, and under the promotion of fluid in valve body slide and setting, wherein,
Described valve body is by top connection (1) and lower contact (8) is dismantled and assembled is connected to form, and junction seals;
Described valve seat is piston (6); Described piston (6) has the first flow channels (9), the second flow channels (11) and the 3rd flow channels (12), described first flow channels (9), the second flow channels (11) and the 3rd flow channels (12) entrance are provided with as each ball moves to the transition part that respective set position plays guide function;
Center distribution in equilateral triangle on piston section of described first flow channels (9), described second flow channels (11) and described 3rd flow channels (12) longitudinal section.
2. three ball seat sealed type pit shaft stop valves according to claim 1, wherein, described piston (6) comprises piston body (601) and piston rod (602), described piston body (601) and top connection (1) be connected by shear pin (3) and with top connection (1) movable sealing; Described piston body (601) there is the retaining ring (4) opened when being embedded with setting; When described piston rod (602) has setting and the hermetically-sealed construction that seals of lower contact (8).
3. three ball seat sealed type pit shaft stop valves according to claim 2, wherein, described transition part comprises first step (18), second step (19), the 3rd step (24);
Described first step (18) is by the upper surface of piston body (601) and described first flow channels (9), the anchor ring that formed between described second flow channels (11) and described 3rd flow channels (12) entrance face;
Described second step (19) is for being positioned at the arc block bottom adjacent two flow channels;
Described 3rd step (24) is the trapezoid block between adjacent two flow channels, the side of described trapezoid block for flow channels wall continuous print arcwall face corresponding to it.
4. three ball seat sealed type pit shaft stop valves according to claim 3, wherein, described 3rd step (24) is provided with described first flow channels (9), described second flow channels (11) and described 3rd flow channels (12) entrance face junction the chamfered transition face (26) sealed when having setting.
5. three ball seat sealed type pit shaft stop valves according to claim 2 to 4 any one, wherein, described first flow channels (9), described second flow channels (11) and described 3rd flow channels (12) include horizontal segment and oblique section;
Described horizontal segment is positioned at piston body, and described horizontal segment is parallel to piston centreline and arranges;
Described oblique section is arranged on piston body and piston rod junction, and the intersection point of described oblique section of center line is positioned on the center line of piston.
6. three ball seat sealed type pit shaft stop valves according to claim 5, wherein, described top connection (1) is connected with lower contact (8) box and pin, has the box (16) and the first shoulder (20) that are connected with top downhole tool in described top connection (1);
Have the second shoulder (21) and sealing drum (22) in described lower contact (8), there is the pin thread (17) be connected with bottom downhole tool described sealing drum (22) bottom;
The lower surface of described second shoulder (21) and top connection (1) forms the axial location groove of described retaining ring (4).
7. three ball seat sealed type pit shaft stop valves according to claim 6, wherein, described first shoulder (20) and described piston body (601) matched in clearance; Described sealing drum (22) and described piston rod (602) matched in clearance.
8. three ball seat sealed type pit shaft stop valves according to claim 5, wherein, there is the assembling duct (23) of installing bottom downhole tool the lower end of described lower contact (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420333851.3U CN204163691U (en) | 2014-06-20 | 2014-06-20 | Three ball seat sealed type pit shaft stop valves |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420333851.3U CN204163691U (en) | 2014-06-20 | 2014-06-20 | Three ball seat sealed type pit shaft stop valves |
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| Publication Number | Publication Date |
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| CN204163691U true CN204163691U (en) | 2015-02-18 |
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| CN201420333851.3U Active CN204163691U (en) | 2014-06-20 | 2014-06-20 | Three ball seat sealed type pit shaft stop valves |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060966A (en) * | 2014-06-20 | 2014-09-24 | 中国海洋石油总公司 | Multi-ball setting shaft stop valve |
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- 2014-06-20 CN CN201420333851.3U patent/CN204163691U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060966A (en) * | 2014-06-20 | 2014-09-24 | 中国海洋石油总公司 | Multi-ball setting shaft stop valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |
|
| CP01 | Change in the name or title of a patent holder |