CN2089521U - Blocking device for oil field - Google Patents
Blocking device for oil field Download PDFInfo
- Publication number
- CN2089521U CN2089521U CN 91206551 CN91206551U CN2089521U CN 2089521 U CN2089521 U CN 2089521U CN 91206551 CN91206551 CN 91206551 CN 91206551 U CN91206551 U CN 91206551U CN 2089521 U CN2089521 U CN 2089521U
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- CN
- China
- Prior art keywords
- blocking agent
- blocking
- connector
- plug
- plugging device
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- Expired - Lifetime
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Abstract
The utility model relates to a device used for the producing well of an oilfield utilizing blocking agent to block a blasthole or a channeling section. The utility model is characterized in that the blocking agent tube and the blocking device of the utility model adopt the structure of the pressure guiding and flow distributing of a double-layer tube; the expansion of a blocking and separating element and the squeeze of the blocking agent are changed into two relatively independent pressure systems; the blocking agent does not enters into the blocking and separating device whose clamp distance has smooth inner and outer surfaces; a temporary blocking device temporarily clamps and blocks the blasthole which is possible to return the blocking agent, solving the problem that the pipe column is easy to be clamped and welded by the blocking agent in the prior art. The device which can block a plurality of layers by going down into the pipe column once does not use pad fluid or displacing fluid on the construction on site, increasing the blocking successful rate and the blocking efficiency.
Description
The utility model relates to a kind of device that the field produces well utilizes blocking agent shutoff borehole, shutoff bunch groove segment that is used for, and it comprises blocking agent pipe, plugging device two large divisions.
Jilin Oil Field has been introduced a kind of shutoff injection technique in the national Water in Water Shutoff in Oil Field meeting in 87 years in " application of cyanogen gel material in the shutoff of oil field " literary composition, this technology uses cyanogen to be blocking agent with fixed attention, cyanogen contacts behind the water immediately and water generation chemical reaction with fixed attention, generate water-fast high strength coagulum, play plugging action.Fig. 1 is a Jilin Oil Field plugging technology down-hole string schematic diagram.Its action principle is: plug (1) is under pump function, and compression cyanogen coagulates (2), and upper and lower packer (3) sets, and pressure raises, and syringe (4) breakdown clamp-ons cyanogen with fixed attention by plugged zone, and voltage stabilizing tripped out the shutoff tubing string after 5 minutes.This technology has following some deficiency:
1, the shutoff tubing string by the card weldering, has following three reasons easily by analysis:
(1) the shutoff tubing string is a single tube, during packer setting, promotes blocking agent by plug (1) and transmits pressure, and blocking agent enters packer inside; Because the resistance shelves of plug (1) are unreliable to making after the release packer accessory be difficult for regaining deblocking;
(2) in the packer card distance, external diameter difference, blocking agent run into the easy pile-up in reducing place to together, form snap ring;
(3) blocking agent is easily returned in the pit shaft and card welded tube post from the bunch groove segment borehole.
2, shutoff success rate is low, in order to prevent card welded tube post, and this process using insulating liquid (5) and displacement fluid (6), insulating liquid influences the blocking agent gluing; The displacement fluid consumption is excessive, and blocking agent was easily replaced the shutoff position, and plug agent amount is little can not to be blocked up again in fact by the shutoff position.This technology band presses curing time short, and the blocking agent shutoff is not tight, easily causes blocking agent " to return and tell ".
3, following one-trip string can only shutoff one deck, and efficiency of construction is low.
The purpose of this utility model is to avoid the deficiency in the above-mentioned prior art and a kind of plugging device is provided.
This device is divided into inside and outside two-tube assembling with blocking agent pipe and plugging device, and interior pipe is made up of choke valve (7), plug assembly (8), blocking agent pipe (9), blocking agent union (10), plug parts such as (11), and each parts is linked to each other by the 50mm tubing thread; Outer tube is by plugging device (12), stifled device (13), plug parts such as (14) are formed temporarily.In the packer card distance of plugging device and temporarily stifled device, external diameter is identical, and the inner connector of inner and outer pipe (42) connects.
The device G.I.H, pump pressure through two-tube circular passage, pilot passage (47), pass to tail pipe, choke valve (7) makes the inside and outside pressure reduction that causes of packer accessory, the sealing of assurance packer accessory, and pressure acts on the plug assembly (8), the promotion blocking agent will cut off (32) and cut off, piston (31) is descending, blocking agent outlet (46) is opened, and blocking agent is squeezed into shutoff position (15), and plug assembly (8) arrives piston bush (34) back bruising, pressure rises, and the termination of pumping band is pressed to wait to coagulate and finished the shutoff construction after the movable tubing string in back trips out tubing string.
Temporarily stifled device is used for the stifled borehole that may return blocking agent of temporary transient card.
This device has the shutoff tubing string and is difficult for card weldering, shutoff efficient and shutoff success rate advantages of higher.
The drawing of accompanying drawing is described as follows:
Fig. 1 Jilin Oil Field plugging technology down-hole string schematic diagram.
Fig. 2 the utility model plugging device schematic diagram.
Fig. 3 choke valve structural representation.
Fig. 4 plug assembly structure schematic diagram.
Fig. 5 blocking agent pipe joint structure schematic diagram.
Fig. 6 plugging device structural representation.
Fig. 7 well head pipeline schematic diagram.
The utility model is described in further detail below in conjunction with accompanying drawing.
This device is divided into inside and outside two-tube assembling with blocking agent pipe and plugging device, shown in Figure 2: interior pipe is made up of choke valve (7), plug assembly (8), blocking agent pipe (9), blocking agent union (10), plug parts such as (11), and each parts is linked to each other by the 50mm tubing thread; Outer tube is by plugging device (12), stifled device (13), plug parts such as (14) are formed temporarily.In the packer card distance of plugging device (12) and temporarily stifled device (13), the external diameter similar face is level and smooth.Inner and outer pipe connects by the interior connector (42) of injection assembly.
Shown in Figure 3: choke valve is made up of ball seat (18), ball (19), ball holder (20), box cupling (21), stage clip (22), compression spring sleeve (23), adjusting screw (24).Ball (19) places between ball seat (18) and ball holder (20), and valve is by ball face sealing; Ball is made by plastics, has in light weight, advantage such as plasticity good, good airproof performance and not corrosion.Stage clip (22) is positioned between ball holder (20) and adjusting screw (24), in the compression spring sleeve (23); Four pod apertures are arranged on the adjusting screw (24), the fluid of crossing valve can be imported the tubing string bottom, it links to each other with the interior button of compression spring sleeve (23), regulate the compression distance of stage clip (22) by screw thread, there is outer button compression spring sleeve (23) lower end, and when the tubing string internal pressure reached the opening pressure of valve, ball (19) was by ball holder (20) compression press spring (22), make the inside and outside pressure reduction that causes of packer accessory, guarantee the packer accessory sealing.
Shown in Figure 4: plug assembly (8) is made up of plug bar (26), plug (27), pad (28), two nuts (29), 6 plugs are made the leather cup shape with rubber, plug (27) is enclosed within on the plug bar (26), first plug upside-down mounting, make plug assembly two way seal, and easily making the blocking agent on the blocking agent tube wall scrape totallyer, nut (29) compresses plug (27) by pad (28).
Shown in Figure 5: blocking agent union (10) by become discount (30), piston (31), cut off (32), sealing ring (33), piston bush (34) is formed.Piston (31) is positioned at piston bush (34), and both are with cutting off (32) location; Piston bush (34) has a step near the end that cuts off, bears the hydrostatic power that acts on the piston (31) when going into the well, and makes to cut off (32) and do not cut off; Piston bush (34) and the screwed connection of change discount (30).
Becoming discount (30) links to each other with the blocking agent pipe with the compression spring sleeve (23) of choke valve.
Shown in Figure 6: the plugging device of outer tube is connected as a single entity upper and lower packer and injection assembly with adapter sleeve (41) by two center taps (40).Adapter sleeve (41) length can be determined apart from length according to upper and lower packer card; Packer uses existing inflatable packer, it is made up of upper, middle and lower joint (35,40,44), sealing ring (36), packer accessory seat (37), central tube (38), packer accessory (39) etc., upper and lower joint is the 76mm tubing thread, and packer accessory is made with packing element; The injection assembly is a bridge architecture, is welded by interior connector (42), outer connector (43), and it is the vitals of this device.Interior connector (42) external surface has the boss of two symmetries; Bore two holes (46) to wearing in the outer connector (43), its inner surface has a step, boss is by back, step location mating holes (46), with the hole a week weld and require the sealing, drill boss facing to hole (46) under intensity that guarantees weld seam and sealing performance condition, hole (46) are the blocking agent outlet; Form pilot passage (47) between inside and outside connector, its effect is: above liquid stream and the pressure of injection assembly can pass to the tubing string bottom from passage, so that the following packer reliable operation of injection assembly can also make this device have the function of a shutoff multilayer.Interior connector (42) upper/lower terminal is to buckle in the 50mm oil pipe, one end links to each other with the piston bush (34) of blocking agent union, the other end links to each other with plug (11), can all link to each other with the blocking agent union at two ends as required, adorns different blocking agents in the blocking agent pipe and reaches better plugging effect.
The temporarily stifled device (13) of outer tube is made up of connector and upper and lower packer, the connector structure is similar to outer connector (43), but it does not bore blocking agent outlet (46), and the identical no step of internal diameter, temporarily stifled device can temporarily block the stifled borehole that may return out blocking agent, according to the concrete condition of site operation well, just use when needing.
During on-the-spot the use, select for use the connected mode that the blocking agent pipe is connected under the plugging device to be the best, it has safety, advantages such as easy construction.The piston bush (34) of blocking agent union is linked to each other with the lower end of interior connector (42), interior connector (42) is gone up termination plug (11), for easy construction can connect a 50mm tubing nipple in piston bush (34) bottom, make the end surpass the lower contact (44) of plugging device, during construction, earlier will be with plug and length 76mm oil pipe G.I.H greater than the blocking agent pipe, to have choke valve (7) again, plug assembly (8), the interior pipe of blocking agent pipe (9) inserts in the 76mm oil pipe, once adorned blocking agent---after cyanogen coagulates, 50mm tubing nipple in the plugging device that has installed is linked to each other with blocking agent pipe screw thread, and lower contact (44) is connected with the 76mm tubing thread.
Shown in Figure 7: pump pressure comes the pressure pipeline oil ninth of the ten Heavenly Stems (45) to connect ball-and-seat (48), connect pressure meter (49) in the threeway, inflow direction access valve (50), ball-and-seat (48) is the on-the-spot valve that generally uses, its effect is: in case pump truck or surface line break down, ground pressure disappears, and valve cuts out automatically and keeps the oil pipe internal pressure to guarantee that the packer sealing performance prevents that blocking agent is counter and tells in the pit shaft.
After tubing string has descended, locate through magnetic, CD, connect the well head pipeline, ground pump truck is suppressed, in the pressure warp, the outer tube circular passage, pilot passage (47), pass to tail pipe and make packer setting, simultaneously, pressure acts on plug assembly (8) through choke valve (7), promote blocking agent, cut off (32) of blocking agent union (10) are cut off, and piston (31) is up, and blocking agent outlet (46) is opened, blocking agent is squeezed into shutoff position (15), plug assembly (8) arrives piston bush (34) back bruising, and pressure rising termination of pumping band is pressed to wait and coagulated movable tubing string after 1 hour, trips out tubing string and finishes the shutoff construction.
The present invention compared with prior art has following advantage:
1, this device adopts bimetallic tube pilot flow dividing structure, and squeezing blocking agent and packer setting is two relatively independent pressure systems, guarantees that packer sealing, deblocking are reliable, reduces lift pipe string and loads; Be but that a tubing string shutoff multi-layer lifting has supplied condition from structure, thereby improve shutoff efficient.
2, external diameter is identical between the two packer cards distance, has reduced remaining in card apart from interior blocking agent, and the blocking phenomenon takes place when having avoided the upper lifting pipe post.
3, use temporarily stifled device that bunch groove segment (17) may be returned out the temporary transient blocking of borehole (16) of blocking agent, avoid blocking agent to return into pit shaft from the channelling borehole, in case card tubing string phenomenon takes place.
4, cancel insulating liquid, displacement fluid in the construction, the measure that adopt and strengthen plug agent amount, prolongs curing time improves plugging effect.
5, blocking agent outlet dress piston (31) is simple in structure, and choke valve, packer do not contact blocking agent, install reusable.
Claims (5)
1, the utility model relates to a kind of device that the field produces well utilizes blocking agent shutoff borehole or bunch groove segment that is used for, it comprises blocking agent pipe and plugging device two large divisions, it is characterized in that: blocking agent pipe and plugging device are divided into inside and outside two-tube assembling, interior pipe is made up of choke valve (7), plug assembly (8), blocking agent pipe (9), blocking agent union (10), plug parts such as (11), and each parts is linked to each other by the 50mm tubing thread; Outer tube is by plugging device (12), stifled device (13), plug (14) parts of etc.ing are formed temporarily, and in plugging device (12) and the temporary packer card distance of blocking up device (13), external diameter is identical, smooth surface.Inner and outer pipe connects by the interior connector (42) of injection assembly.
2, plugging device as claimed in claim 1, it is characterized in that: choke valve (7) is made up of ball seat (18), ball (19), ball holder (20), box cupling (21), stage clip (22), compression spring sleeve (23), adjusting screw (24), and four pod apertures are arranged on the adjusting screw (24);
Plug assembly (8) is made up of plug bar (26), plug (27), pad (28), nut (29);
Blocking agent union (10) by become discount (30), piston (31), cut off (32), sealing ring (33), piston bush (34) is formed, there is a step close piston bush (34) end that cuts off (32).
Becoming discount (30) links to each other with blocking agent pipe screw thread with compression spring sleeve (23).
3, as claim: 1,2 described plugging devices is characterized in that: the plugging device of outer tube is connected as a single entity upper and lower packer and injection assembly with adapter sleeve (41) by center tap (40).
4, plugging device as claimed in claim 3, it is characterized in that: the injection assembly of outer tube plugging device is by interior connector (42), outer connector (43) is formed, outer connector (43) inner surface has a step, interior connector (42) appearance has the boss of two symmetries, both are welded as a whole, the middle part symmetry has drilled blocking agent outlet (46), it between inside and outside connector pilot passage (47), interior connector (42) upper/lower terminal is to buckle in the 50mm oil pipe, links to each other with plug (11) screw thread with piston bush (34) respectively.
5, plugging device as claimed in claim 1 is characterized in that: the temporarily stifled device (13) of outer tube is made up of connector and upper and lower packer, and connector is similar to outer connector (43), but does not bore blocking agent outlet (46) and the identical no step of internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91206551 CN2089521U (en) | 1991-04-18 | 1991-04-18 | Blocking device for oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91206551 CN2089521U (en) | 1991-04-18 | 1991-04-18 | Blocking device for oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2089521U true CN2089521U (en) | 1991-11-27 |
Family
ID=4916187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91206551 Expired - Lifetime CN2089521U (en) | 1991-04-18 | 1991-04-18 | Blocking device for oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2089521U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110878679A (en) * | 2018-09-06 | 2020-03-13 | 中国石油化工股份有限公司 | Tail pipe string |
| CN110984904A (en) * | 2019-10-29 | 2020-04-10 | 东北大学 | Air pressure type separation high-pressure liquid injection device and method for complex fractured rock mass |
-
1991
- 1991-04-18 CN CN 91206551 patent/CN2089521U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110878679A (en) * | 2018-09-06 | 2020-03-13 | 中国石油化工股份有限公司 | Tail pipe string |
| CN110878679B (en) * | 2018-09-06 | 2021-02-26 | 中国石油化工股份有限公司 | Tail pipe string |
| CN110984904A (en) * | 2019-10-29 | 2020-04-10 | 东北大学 | Air pressure type separation high-pressure liquid injection device and method for complex fractured rock mass |
| CN110984904B (en) * | 2019-10-29 | 2021-06-18 | 东北大学 | Air pressure type separation high-pressure liquid injection device and method for complex fractured rock mass |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |