CN201738854U - Casing patching device - Google Patents
Casing patching device Download PDFInfo
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- CN201738854U CN201738854U CN2010202929113U CN201020292911U CN201738854U CN 201738854 U CN201738854 U CN 201738854U CN 2010202929113 U CN2010202929113 U CN 2010202929113U CN 201020292911 U CN201020292911 U CN 201020292911U CN 201738854 U CN201738854 U CN 201738854U
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- expansion
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- joint
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- Expired - Fee Related
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Abstract
The utility model discloses a casing patching device, comprising a slide valve (1), a filter tube (2), a telescopic unit (3), a hydraulic anchor body (4), a hydraulic cylinder (5) and an expansion apparatus (6) which are connected in order. The expansion apparatus (6) comprises a joint shaft (26) in connection with threads of the hydraulic cylinder (5). The joint shaft (26) is sleeved with a rigid expansion joint (27), an elastic expansion joint (28) and a pressure cap (29) from up to down. The lower end of the pressure cap (29) is fixed via a locking nut (30). The upper part of the elastic expansion joint (28) is provided with a jaw, which is clamped at the lower end face of the rigid expansion joint (27). The casing patching device of the utility model undergoes two-stage expansion of the rigid expansion joint and the elastic expansion joint and is provided with a righting apparatus. When a tubing string is pulled to move upward, the rigid expansion joint first performs the primary expansion and then the elastic expansion joint continues the expansion, thereby reducing the expansion resistance, enabling an expansion tube to be tightly patched on the inner wall of a casing with good patching effects and avoiding the patching failure or more serious accidents caused by too large an expansion tube force and the expansion joint deadlocking.
Description
Technical field
The utility model relates to a kind of sheath repairing tool, belongs to oil exploitation workover rig technical field.
Background technology
In the middle and later periods of oilfield exploitation, be subjected to multiple factor effect, Casing Failure produces damages such as leakage, distortion, bad break, has had a strong impact on the ordinary production in oil field.Need repair Casing Failure.The casing patching technology can repair this class casing damage and mistake is penetrated, casing patching, to subsidize expand tube with tubing string exactly and the subsidy instrument is delivered to the casing damage position, and lift subsidy tool drives expansion-head and make the expand tube distending tightly subsidize on internal surface of sleeve pipe the shutoff leak source.Casing patching, have the engineering time short, success rate is high, low cost and other advantages, in China's oil field widespread usage.
The expansion-head external diameter of conventional cannula subsidy instrument is fixed, and does not have erection device, lifts tubing string and moves up and be difficult to make expand tube tightly to subsidize on internal surface of sleeve pipe, and subsidy effect is poor.In addition, not in place when the drifting milling that runs into the subsidy position, the junk projection is perhaps arranged, or the wrong section of activity, the expand tube power when these several situations all can cause subsidizing is too high, and expansion-head is stuck, and causes subsidy failure or more serious accident.
Summary of the invention
The purpose of this utility model is, a kind of sheath repairing tool is provided.By rigidity expand head and the bloated double expansion of elasticity, and be provided with erection device, when lifting tubing string when moving up, expansion tube tightly subsidized on internal surface of sleeve pipe, subsidy effect is good.And can prevent that expand tube power is too high, expansion-head is stuck, and causes subsidy failure or more serious accident.
The technical solution of the utility model: a kind of sheath repairing tool comprises the guiding valve, filter pipe, expansion bend, hydraulic anchor body, fluid cylinder and the expansion gear that connect successively; Expansion gear comprises joint axis, and joint axis is threaded with fluid cylinder; Be with the bloated head of rigidity, the bloated head of elasticity and pressure cap on the joint axis from top to bottom, the lower end of pressure cap is fixed through locking nut; The top of the bloated head of elasticity is provided with the tooth pawl, and the tooth pawl is stuck in the lower surface of the bloated head of rigidity.
In the aforesaid sheath repairing tool, described guiding valve comprises axle, is provided with filter pipe in the axle; The axle upper end is threaded with top connection, and the axle lower end is connected with joint screw thread; The axle outside is with positioning sleeve and sealing shroud, and positioning sleeve can slide outside axle; Be connected with one group of leaf spring between positioning sleeve and the sealing shroud, leaf spring is connected with sealing shroud with positioning sleeve through screw.
In the aforesaid sheath repairing tool, described expansion bend comprises cylinder sleeve, and the cylinder sleeve upper end is connected with the joint screw thread of guiding valve lower end; Be provided with expansion pad in the cylinder sleeve, expansion pad and cylinder sleeve are slidingly connected, and expansion pad is threaded with expansion link, and expansion link is with lower contact outward, and lower contact and expansion link are slidingly connected, and lower contact is threaded with cylinder sleeve.
In the aforesaid sheath repairing tool, the upper end of described hydraulic anchor body is threaded with the lower end of expansion link, is distributed with anchor fluke on the hydraulic anchor body, and the lower end of hydraulic anchor body is connected with the fluid cylinder upper end.
In the aforesaid sheath repairing tool, described fluid cylinder comprises connector, and the top of connector is connected with the lower thread of hydraulic anchor body; Connector is connected with the splined shaft spline, and splined shaft is threaded with the top of upper spindle, and the bottom of upper spindle is threaded with the top of piston; Lower part of piston is threaded with the lower spindle upper end, and the lower spindle lower end is threaded with expansion gear; The outside of piston is provided with cylinder barrel, and cylinder barrel top is connected with the connector lower thread, and the cylinder barrel bottom is threaded with the expansion tube supporting positive cover.
Compared with prior art, the utility model is by bloated head of rigidity and the bloated double expansion of elasticity, and be provided with erection device, when lifting tubing string when moving up, rigidity expands and carries out elementary expansion earlier, then the elasticity head that expands continues to expand then, has reduced expansion resistance like this and has made the construction of expanding reach good effect, has improved subsidy efficient.Expansion tube is tightly subsidized on internal surface of sleeve pipe, and subsidy effect is good.The utility model design has guiding valve to play the effect that cuts off inside and outside mud circulation, and guiding valve also played the effect of setting upright, and allows bloat tool that good stationarity has been arranged.Design has filter pipe, has filtered the big particle in the mud, prevents that big particle is stuck in some positions of instrument, causes construction failure or more serious accident.And can prevent that expand tube power is too high, expansion-head is stuck, and causes subsidy failure or more serious accident.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of guiding valve;
Fig. 3 is the structural representation of expansion bend;
Fig. 4 is the schematic perspective view of hydraulic anchor body;
Fig. 5 is the structural representation of fluid cylinder.
Fig. 6 is the structural representation of expansion gear;
Fig. 7 is the structural representation of the bloated head of rigidity.
Being labeled as in the accompanying drawing: 1-guiding valve, the 2-filter pipe, the 3-expansion bend, 4-hydraulic anchor body, the 5-fluid cylinder, the 6-expansion gear, the 7-top connection, the 8-axle, the 9-positioning sleeve, the 10-screw, the 11-leaf spring, the 12-sealing shroud, the 13-hole, the 14-joint, the 15-cylinder sleeve, the 16-expansion pad, the 17-expansion link, the 18-lower contact, the 19-connector, the 20-splined shaft, the 21-upper spindle, the 22-cylinder barrel, the 23-piston, the 24-lower spindle, 25-expansion tube supporting positive cover, the 26-joint axis, the 27-rigidity head that expands, the 28-elasticity head that expands, the 29-pressure cap, the 30-locking nut.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples, but not as to any restriction of the present utility model.
Embodiment.The utility model as shown in Figure 1.A kind of sheath repairing tool comprises the guiding valve 1, filter pipe 2, expansion bend 3, hydraulic anchor body 4, fluid cylinder 5 and the expansion gear 6 that connect successively; Expansion gear 6 comprises joint axis 26 as shown in Figure 6, and joint axis 26 is threaded with fluid cylinder 5; Be with from top to bottom on the joint axis 26 that rigidity expands 27, elasticity expands 28 and pressure cap 29, the lower end of pressure cap 29 is fixing through locking nut 30; Expand 28 top of elasticity is provided with the tooth pawl, and the tooth pawl is stuck in an expand lower surface of 27 of rigidity.Rigidity expands 27 as shown in Figure 7, and rigidity expands and 27 is taper shape and cone angle is 26 °, and modular angle is 5 °, and when modular angle was 5 °, expansion sex change power be minimum.Rigidity 27 end face, 6 holes that also evenly distribute of expanding, drilling fluid can flow through these holes and play cooling and lubrication.Bloated 28 top of elasticity are made up of 8 block teeth, and the bottom is as a whole, and is gapped between adjacent two teeth, can shrink when meeting card, can expansion can play the unfreezing effect again.
Described guiding valve 1 comprises axle 8 as shown in Figure 2, is provided with filter pipe 2 in the axle 8; Axle 8 upper ends are threaded with top connection 7, and axle 8 lower ends are threaded with joint 14; Axle 8 outsides are with positioning sleeve 9 and sealing shroud 12, and positioning sleeve 9 can slide outside axle 8; Be connected with one group of leaf spring 11 between positioning sleeve 9 and the sealing shroud 12, leaf spring 11 is connected with sealing shroud 12 with positioning sleeve 9 through screw 10.Described expansion bend 3 comprises cylinder sleeve 15 as shown in Figure 3, and cylinder sleeve 15 upper ends are threaded with the joint 14 of guiding valve 1 lower end; Be provided with expansion pad 16 in the cylinder sleeve 15, expansion pad 16 is slidingly connected with cylinder sleeve 15, and expansion pad 16 is threaded with expansion link 17, is with lower contact 18 outside the expansion link 17, and lower contact 18 is slidingly connected with expansion link 17, and lower contact 18 is threaded with cylinder sleeve 15.Described hydraulic anchor body 4 as shown in Figure 4, the upper end of hydraulic anchor body 4 is threaded with the lower end of expansion link 17, is distributed with anchor fluke on the hydraulic anchor body 4, the lower end of hydraulic anchor body 4 is connected with fluid cylinder 5 upper ends.Described fluid cylinder 5 comprises connector 19 as shown in Figure 5, and the top of connector 19 is connected with the lower thread of hydraulic anchor body 4; Connector 19 is connected with splined shaft 20 splines, and splined shaft 20 is threaded with the top of upper spindle 21, and the bottom of upper spindle 21 is threaded with the top of piston 23; The bottom of piston 23 is threaded with lower spindle 24 upper ends, and lower spindle 24 lower ends are threaded with expansion gear 6; The outside of piston 23 is provided with cylinder barrel 22, and cylinder barrel 22 tops are connected with connector 19 lower thread, and cylinder barrel 22 bottoms are threaded with expansion tube supporting positive cover 25.
The function of critical piece
Guiding valve 1 is as circulation canal, by on put to put and realize opening or closing circulation canal; Leaf spring 11 on the guiding valve 1 plays centralizing function simultaneously;
Expansion bend 3 is to play the jarring releasing effect when the subsidy instrument is met card, realizes in the subsidy process guiding valve is carried out switch;
Expansion tube supporting positive cover 25 plays the effect of setting upright and finish bloated expansion of first stroke and fixed expansion pipe;
Rigidity expand 27 and elasticity to expand 28 are critical components of subsidy instrument, elasticity expands and 28 adopts eight lobe separate structures, has enough intensity hardness and suitable elasticity, guarantees that expansion tube expands reliably to be attached on the internal surface of sleeve pipe.
Operating principle of the present utility model
During work at first the instrument of transferring enter expansion tube, because the leaf spring 11 of guiding valve 1 has resistance with expansion tube inside, so guiding valve is opened when transferring, mud is by hole 13 and outside circulation in transferring process.Upper lifting pipe post during expansion, this moment, the sealing shroud 12 of guiding valve 1 moved downward, hole 13 sealing mud circulation are intercepted, because the pressure in the bloat tool is not when having sealing greater than guiding valve 1, the anchor fluke of high-pressure slurry hydraulic anchor body during by hydraulic anchor body 4 opens interlock internal surface of sleeve pipe location.When high-pressure slurry is flowed through fluid cylinder 5, a top chamber of fluid cylinder 5 and tubing string are outer towards logical, below chamber introversive logical with pipe, so the pressure in following chamber greater than top chamber, moves up so piston 23 drives lower spindle 24, expansion gear 6 also moves up with lower spindle 24, it is 28 up together through expansion tubes that rigidity expands 27, elasticity expands, the subsidy that expansion tube is firm forms a sealed whole body with former well inner sleeve on internal surface of sleeve pipe, thereby realizes the requirement of shutoff purpose well section.
Claims (5)
1. a sheath repairing tool is characterized in that: comprise the guiding valve (1), filter pipe (2), expansion bend (3), hydraulic anchor body (4), fluid cylinder (5) and the expansion gear (6) that connect successively; Expansion gear (6) comprises joint axis (26), and joint axis (26) is threaded with fluid cylinder (5); Be with the bloated head of rigidity (27), the bloated head of elasticity (28) and a pressure cap (29) on the joint axis (26) from top to bottom, the lower end of pressure cap (29) is fixing through locking nut (30); The top of the bloated head of elasticity (28) is provided with the tooth pawl, and the tooth pawl is stuck in the lower surface of the bloated head of rigidity (27).
2. sheath repairing tool according to claim 1 is characterized in that: described guiding valve (1) comprises axle (8), is provided with filter pipe (2) in the axle (8); Axle (8) upper end is threaded with top connection (7), and axle (8) lower end is threaded with joint (14); Axle (8) outside is with positioning sleeve (9) and sealing shroud (12), and positioning sleeve (9) can slide outside axle (8); Be connected with one group of leaf spring (11) between positioning sleeve (9) and the sealing shroud (12), leaf spring (11) is connected with sealing shroud (12) with positioning sleeve (9) through screw (10).
3. sheath repairing tool according to claim 2 is characterized in that: described expansion bend (3) comprises cylinder sleeve (15), and cylinder sleeve (15) upper end is threaded with the joint (14) of guiding valve (1) lower end; Be provided with expansion pad (16) in the cylinder sleeve (15), expansion pad (16) is slidingly connected with cylinder sleeve (15), expansion pad (16) is threaded with expansion link (17), be with lower contact (18) outside the expansion link (17), lower contact (18) is slidingly connected with expansion link (17), and lower contact (18) is threaded with cylinder sleeve (15).
4. sheath repairing tool according to claim 1 is characterized in that: the upper end of described hydraulic anchor body (4) is threaded with the lower end of expansion link (17), and the hydraulic anchor body is distributed with anchor fluke on (4), and the lower end of hydraulic anchor body (4) is connected with fluid cylinder (5) upper end.
5. sheath repairing tool according to claim 1 is characterized in that: described fluid cylinder (5) comprises connector (19), and the top of connector (19) is connected with the lower thread of hydraulic anchor body (4); Connector (19) is connected with splined shaft (20) spline, and splined shaft (20) is threaded with the top of upper spindle (21), and the bottom of upper spindle (21) is threaded with the top of piston (23); The bottom of piston (23) is threaded with lower spindle (24) upper end, and lower spindle (24) lower end is threaded with expansion gear (6); The outside of piston (23) is provided with cylinder barrel (22), and cylinder barrel (22) top is connected with connector (19) lower thread, and cylinder barrel (22) bottom is threaded with expansion tube supporting positive cover (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202929113U CN201738854U (en) | 2010-08-16 | 2010-08-16 | Casing patching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202929113U CN201738854U (en) | 2010-08-16 | 2010-08-16 | Casing patching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201738854U true CN201738854U (en) | 2011-02-09 |
Family
ID=43554132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202929113U Expired - Fee Related CN201738854U (en) | 2010-08-16 | 2010-08-16 | Casing patching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201738854U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061700A (en) * | 2011-10-21 | 2013-04-24 | 中国石油化工股份有限公司 | Casing pipe dislocation horizontal well correction and repair method and dedicated integration tools of casing pipe dislocation horizontal well correction and repair |
| CN109707333A (en) * | 2018-11-15 | 2019-05-03 | 中国石油天然气股份有限公司 | A kind of oil well casing self-expanding subsidy method |
| CN113250638A (en) * | 2020-02-07 | 2021-08-13 | 中国石油天然气股份有限公司 | Hydraulic pipe expanding device and method for performing pipe expanding treatment |
-
2010
- 2010-08-16 CN CN2010202929113U patent/CN201738854U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061700A (en) * | 2011-10-21 | 2013-04-24 | 中国石油化工股份有限公司 | Casing pipe dislocation horizontal well correction and repair method and dedicated integration tools of casing pipe dislocation horizontal well correction and repair |
| CN109707333A (en) * | 2018-11-15 | 2019-05-03 | 中国石油天然气股份有限公司 | A kind of oil well casing self-expanding subsidy method |
| CN113250638A (en) * | 2020-02-07 | 2021-08-13 | 中国石油天然气股份有限公司 | Hydraulic pipe expanding device and method for performing pipe expanding treatment |
| CN113250638B (en) * | 2020-02-07 | 2023-01-10 | 中国石油天然气股份有限公司 | Hydraulic pipe expanding device and method for performing pipe expanding treatment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20160816 |