CN217206379U - Wrong broken casing pipe salvaging and centralizing device - Google Patents
Wrong broken casing pipe salvaging and centralizing device Download PDFInfo
- Publication number
- CN217206379U CN217206379U CN202221336445.3U CN202221336445U CN217206379U CN 217206379 U CN217206379 U CN 217206379U CN 202221336445 U CN202221336445 U CN 202221336445U CN 217206379 U CN217206379 U CN 217206379U
- Authority
- CN
- China
- Prior art keywords
- wall
- hook
- sleeve
- spiral
- spiral sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Separating Particles In Gases By Inertia (AREA)
Abstract
The utility model discloses a broken sleeve salvaging and centralizing device, which relates to the technical field of oil and gas well salvaging tools and comprises a pipe body, a wall shifting hook and a pressure spring, wherein the upper end of the pipe body is provided with an upper joint which is used for connecting a salvaging pipe column; a vertical introduction groove is formed in the middle of the pipe body; the pipe body below the lead-in groove is a spiral sleeve, the wall shifting hook is arc-shaped, and the tail end of the wall shifting hook is vertically and rotatably arranged at the lower end of the spiral sleeve through a fixing pin; one end of the pressure spring is connected with the top of the wall shifting hook, and the other end of the pressure spring is connected with the spiral sleeve on the upper side of the wall shifting hook; under the condition of no external force, the wall-pulling hook is in a horizontal and straight state; the lower end of the spiral sleeve is provided with a shearing pin for limiting the wall shifting hook; the device has simple structure and high capturing success rate, and can introduce the broken casing into the pipe body through the wall-shifting hook and the spiral sleeve to centralize and salvage the broken casing; the device has obvious effect of treating the casing pipe fault, stabilizes the extraction and injection work of an oil production plant after treatment, and improves the recovery ratio of the oil-water well.
Description
Technical Field
The utility model relates to an oil gas well fishing tool technical field, concretely relates to wrong disconnected sleeve pipe is salvaged and is right device.
Background
With continuous exploitation of oil fields for decades, the phenomenon of casing fracture increases year by year, and the damage of the casing affects the pressure distribution in a shaft, or the abandonment of an oil-water well, even blowout occurs, and serious environmental pollution is caused. The oil layer casing dislocation is caused based on multiple reasons, and the casing dislocation is because of the difference of gradient, causes the distance of casing dislocation not equal, and some dislocation a few centimeters or even dislocation a few meters far away, is improper because of the measure at the salvage in-process moreover, very easily causes scrapping of this well.
The method comprises the steps of firstly checking the casing pipe fault position when the casing pipe fault occurs in the oil-water well, determining the depth and the form of the fault casing pipe, and taking corresponding repairing measures according to different positions.
1. In the deep well and well section sealed by cement, the inner side of the casing is basically drilled, a new well hole is drilled, and the residual oil reservoir is exploited.
2. And for shallow strata, if the casing pipe is broken by mistake and has small displacement, the casing pipe is repaired by basically adopting a sleeve changing butt joint mode.
3. In the aspect of large-displacement dislocation of shallow casings, relatively mature technologies and special fishing tools do not exist, and fishing measures are basically implemented by fishing from the upper parts of the dislocation casings, namely the dislocation casings can be found and are difficult to centralize.
Dozens of tools are processed and manufactured aiming at the fishing of the large-displacement broken casing pipe for years, various kinds of fishing are tried, but the effect is extremely undesirable.
The salvaging mode mostly depends on gas transportation, the technical content is low, the effect is not ideal, the construction time efficiency is delayed, and a large amount of manpower and material resources are wasted.
Chinese patent CN101886529B discloses a method for repairing a broken well and opening a channel, which is characterized by comprising the following five steps: firstly, exposing a fault breaking point, flushing the fault breaking point by adopting a flat-bottom grinding shoe and drill rod combination or a scraper drill and drill rod combination, and printing and confirming if necessary; secondly, a flat-bottom grinding shoe, a milling rod, more than two drill collars and a drill rod are combined for primary grinding and milling of a fault point, wherein the depth is required to be 0.5-1 m, and the pressure is required to be 0.5-1 ton; thirdly, a milling cone, a drill collar, a centralizer, a drill collar and a drill rod are combined to grind and mill the fault point again, the footage is required to be from the meeting resistance point to the fault point, and the pressurization is less than 0.5 ton; fourthly, a milling cone, one drill collar, a centralizer, one drill collar, the centralizer and a drill rod are combined to mill the wrong breaking point again, and the pressure is required to be less than 0.5 ton from the resisting point to the deepest point of the previous drill; fifthly, verifying the effect of punching a channel at a fault point by adopting a combination of a flat-bottom grind shoe and a drill rod, or a combination of a bent pen point, a milling rod and a drill rod; the method is complex to operate and has unsatisfactory fishing effect.
Chinese patent CN214247256U discloses a fishing passage combination tool with smooth casing damage. The guiding pipe is arranged in the hydraulic cylinder body and the milling head, the end part of the guiding pipe in the hydraulic cylinder body is connected with a nut, a piston, a supporting sleeve and a flat gasket are sequentially sleeved on the end part along the length extension direction of the guiding pipe, and a sealing ring is arranged between the piston and the hydraulic cylinder body; the guide pipe is sleeved with a thrust ball bearing, a needle bearing and an oil seal in sequence along the extension direction of the outward length of the guide pipe in the sleeve milling head. The lower part of the guide tube is a sharp part. The guide tube can accurately find the position of the casing pipe fault, and plays a role in guiding the milling of the milling head; the tool can quickly finish the smooth work of a casing passage, but does not have the fishing function and needs to be matched with other fishing pipe columns.
Therefore, it is urgently needed to develop a convenient fishing tool for broken casing.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a fault sleeve pipe is salvaged and is right device to the defect that prior art exists.
The technical scheme of the utility model is that: a fishing and centering device for a broken sleeve comprises a pipe body, a wall shifting hook and a pressure spring, wherein an upper connector is arranged at the upper end of the pipe body, and a vertical introducing groove is formed in the middle of the pipe body; the pipe body below the introduction groove is a spiral sleeve, the wall shifting hook is arc-shaped, and the tail end of the wall shifting hook is vertically and rotatably installed at the lower end of the spiral sleeve; one end of the pressure spring is connected with the top of the wall shifting hook, and the other end of the pressure spring is connected with the spiral sleeve on the upper side of the wall shifting hook; under the condition of no external force, the wall poking hook is in a horizontal and straight state; the lower extreme of spiral shell is equipped with and provides spacing shearing pin for dialling the wall hook.
Preferably, the lead-in groove is positioned 2m below the upper connector, the length of the lead-in groove is 4m, and the opening depth is 2/5 of the diameter of the pipe body.
Preferably, the width of the spiral sleeve helix body is 200mm, and the interval is 100 mm.
Preferably, the helical body of the helical casing has four turns.
Preferably, the length of the wall pulling hook is equal to the radius of the broken sleeve, and the width of the wall pulling hook is more than or equal to 100 mm.
Preferably, the wall pulling hook is rotatably installed at the lower end of the spiral sleeve through a fixing pin.
Preferably, the shear pin has a shear resistance of 1000 KN.
Preferably, the upper joint is a screw thread, and the upper end of the upper joint is provided with a limiting block for limiting the upward movement of the upper joint.
Compared with the prior art, the utility model, have following advantage:
(1) the device has simple structure and high capturing success rate, and can introduce the broken casing into the pipe body through the wall-shifting hook and the spiral sleeve to centralize and salvage the broken casing;
(2) the device is simple and convenient to operate, and can save a large amount of manpower and material resources;
(3) the device has obvious effect of treating the casing pipe fault, stabilizes the extraction and injection work of an oil production plant after treatment, improves the recovery ratio of an oil-water well, avoids the abandonment of the oil-water well, and avoids the major hidden trouble of no control blowout;
(4) with continuous exploitation of oil fields for decades, the fracture phenomenon of shallow casing pipes is increased year by year, and the tool and the operation process play a key role in casing damage treatment.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
fig. 3 is a schematic view of the usage state of the present invention.
In the figure: 1. the device comprises an upper joint, a pipe body, a lead-in groove, a spiral sleeve, a pressure spring, a wall-pulling hook, a shear pin and a fixing pin, wherein the upper joint is 2, the pipe body is 3, the lead-in groove is 4, the spiral sleeve is 5, the pressure spring is 6, the wall-pulling hook is 7, and the shear pin is 8.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example one
Referring to fig. 1-2, the fishing and centering device for the broken casing comprises a pipe body 2, a wall shifting hook 6 and a pressure spring 5, wherein an upper connector 1 is arranged at the upper end of the pipe body 2, and the upper connector 1 is used for connecting a fishing pipe column; a vertical introducing groove 3 is formed in the middle of the pipe body 2; the pipe body 2 below the lead-in groove 3 is a spiral sleeve 4, the wall shifting hook 6 is arc-shaped, and the tail end of the wall shifting hook is vertically and rotatably arranged at the lower end of the spiral sleeve 4 through a fixing pin 8; one end of a pressure spring 5 is connected with the top of the wall shifting hook 6, and the other end is connected with the spiral sleeve 4 on the upper side of the wall shifting hook 6; under the condition of no external force, the wall poking hook 6 is in a horizontal and straight state; the lower end of the spiral sleeve 4 is provided with a shearing pin 7 for limiting the wall shifting hook 6.
The introducing groove 3 is used for introducing the broken sleeve into the pipe body 2 after the wall shifting hook 6 hooks the broken sleeve, the introducing groove 3 is used for vertically cutting the pipe body 2m below the upper joint 1 according to 2/5 proportion, the length is controlled to be about 4m, all cut inner end surfaces are chamfered, and the pipe body 2 below the lower end opening of the introducing groove 3 is cut into the spiral sleeve 4.
The spiral sleeve 4 has the effects that after the wall shifting hook 6 hooks the broken sleeve, the spiral sleeve 4 rotates, yields and extends along with the wall shifting hook 6, and the broken sleeve is received in the spiral sleeve 4; the spiral casing 4 is a spiral body formed by cutting the pipe body 2 into pieces having a width of 200mm and a spacing of 100 mm.
The wall pulling hook 6 is used for hooking the broken sleeve, and the hook body leads the broken sleeve into the spiral sleeve 4 through rotation; the length of the wall pulling hook 6 needs to be processed and manufactured according to the length of the radius of the broken sleeve, and the wall pulling hook is bent into a hook shape.
The pressure spring 5 is used for enabling the wall shifting hook 6 to be always in a horizontal and straight state in the annular space of the sleeve; one end of the pressure spring 5 is pressed on the wall shifting hook 6, the other end of the pressure spring is pressed on the spiral sleeve 4, in the surface layer sleeve, the pressure spring 5 is pressed, the wall shifting hook 6 is in an upwarping state, the surface layer sleeve is produced, the wall shifting hook 6 is in a horizontal and straight state under the pressure of the pressure spring 5, and the fault broken sleeve can be conveniently found.
The working steps of the device are as follows:
(1) and (3) verifying the casing pipe fault condition:
and (3) a pipe column is verified by a lead mold, a pump is started to flush above the position of the casing pipe fault, the pipe column is placed while flushing, after the pipe column meets a blockage, the depth is checked, the pipe column is pressurized and printed once, the change of the lead seal is checked after the pipe column is pulled out, and the casing pipe fault condition is verified. If the fault can not be determined, the lower sleeve milling barrel is verified again, and if the fault occurs due to large displacement, the lower process is adopted.
(2) And (3) finding a sleeve in an open hole annulus:
and (3) lowering a sand-washing drill bit pipe column, circularly washing, drilling and milling by using slurry with large discharge capacity and light bit pressure, controlling the bit pressure to be about 5KN, and keeping the verticality of the drilling tool. The sand flushing drill bit contacts the original sleeve, the phenomenon of collision and scraping is caused, and the driller can feel torque from the rotary table. And after the contact with the original casing is confirmed, the well is fully washed circularly, and annular silt outside the original casing is cleaned up, so that an open hole space is formed outside the original casing. When the drill is started, the drill-starting speed is controlled, mud is poured while the drill is started, and the annular pressure difference is balanced.
(3) The following capture tool operations:
the state of the wall shifting hook 6 of the capture tool before the capture tool goes into the well is in a horizontal and straight state, after the capture tool enters the casing, the wall shifting hook 6 is in an upwarping state under the action of the downward force of the drilling tool, moves downwards along the inner wall of the casing on the surface layer, and the downward speed is controlled in the downward drilling process. After the catching tool goes out of the surface casing, the wall shifting hook 6 is in a horizontal and straight state under the action of the pressure spring 5.
(4) Fishing operation of a capture tool:
referring to fig. 3, after the capture tool is rotated out of the surface casing, a mud pump is started to perform circulating flushing, the bit pressure is controlled, the drilling tool is slowly lowered while flushing is performed, the original hanging weight is lowered, the depth is checked, and it is determined that the capture tool reaches the periphery of the original oil layer casing. The drilling tool is lifted upwards, the rotary disc is opened, the capturing tool rotates along with the original casing pipe under the action of rotating force, the wall shifting hook 6 hooks the original casing pipe, the spiral casing 4 extends along with the wall shifting hook 6 in a yielding mode, and the casing pipe is collected into the spiral casing 4 through rotation. And slowly lifting the drilling tool, wherein the spiral sleeve 4 can rub the original casing pipe along with the lifting of the drilling tool to generate a certain pulling force, the change of the hanging weight is noticed in the drilling process, the hanging weight is lowered to some extent, the casing pipe is received into the introducing groove 3, the drilling tool is slowly lowered after lifting for one meter, and whether the casing pipe is captured or not is judged according to the distance between the introducing groove 3 and the upper joint 1. (if not captured, repeat the procedure).
(5) Catching tool pulling-out operation:
when the capture tool pipe column needs to be lifted out, the drilling tool is slowly lifted, the wall shifting hook 6 is in a horizontal straight state, the diameter of the wall shifting hook is larger than that of a surface casing, when the wall shifting hook 6 moves upwards to a surface casing shoe, the wall shifting hook 6 cuts the shearing pin 7 under the action of lifting force, the wall shifting hook 6 is in a drooping state, and the capture tool pipe column is conveniently and smoothly lifted out.
The device has simple structure and high capturing success rate, and can introduce the broken casing into the pipe body 2 through the wall shifting hook 6 and the spiral sleeve 4 to centralize and salvage the broken casing; the device is simple and convenient to operate, and can save a large amount of manpower and material resources; the device has obvious effect of treating the casing pipe fault, stabilizes the extraction and injection work of an oil production plant after treatment, improves the recovery ratio of an oil-water well, avoids the abandonment of the oil-water well, and avoids the major hidden trouble of no control blowout; with continuous exploitation of oil fields for decades, the fracture phenomenon of shallow casing pipes is increased year by year, and the tool and the operation process play a key role in casing damage treatment.
Example two
Referring to fig. 1-2, the fishing and centering device for the broken casing comprises a pipe body 2, a wall shifting hook 6 and a pressure spring 5, wherein an upper connector 1 is arranged at the upper end of the pipe body 2, and the upper connector 1 is used for connecting a fishing pipe column; a vertical introducing groove 3 is formed in the middle of the pipe body 2; the pipe body 2 below the lead-in groove 3 is a spiral sleeve 4, the wall shifting hook 6 is arc-shaped, and the tail end of the wall shifting hook is vertically and rotatably arranged at the lower end of the spiral sleeve 4 through a fixing pin 8; one end of a pressure spring 5 is connected with the top of the wall shifting hook 6, and the other end is connected with the spiral sleeve 4 on the upper side of the wall shifting hook 6; under the condition of no external force, the wall poking hook 6 is in a horizontal and straight state; the lower end of the screw sleeve 4 is provided with a shearing pin 7 for limiting the wall poking hook 6.
In more detail, the lead-in groove 3 is located 2m below the upper joint 1, has a length of 4m, and has an opening depth of 2/5 times the diameter of the pipe body 2.
The width of the spiral body of the spiral sleeve 4 is 200mm, and the interval is 100 mm.
The length of the wall pulling hook 6 is equal to the radius of the broken sleeve.
In addition, in this embodiment, the structure of the screw sleeve 4 is further optimized on the basis of the first embodiment, specifically:
in this embodiment, in order to ensure the yield strength and the elongation strength of the screw casing 4, the spiral body of the screw casing 4 is preferably four turns.
EXAMPLE III
Referring to fig. 1-2, the fishing and centering device for the broken casing comprises a pipe body 2, a wall shifting hook 6 and a pressure spring 5, wherein an upper connector 1 is arranged at the upper end of the pipe body 2, and the upper connector 1 is used for connecting a fishing pipe column; a vertical introducing groove 3 is formed in the middle of the pipe body 2; the pipe body 2 below the lead-in groove 3 is a spiral sleeve 4, the wall shifting hook 6 is arc-shaped, and the tail end of the wall shifting hook is vertically and rotatably arranged at the lower end of the spiral sleeve 4 through a fixing pin 8; one end of a pressure spring 5 is connected with the top of the wall shifting hook 6, and the other end is connected with the spiral sleeve 4 on the upper side of the wall shifting hook 6; under the condition of no external force, the wall poking hook 6 is in a horizontal and straight state; the lower end of the screw sleeve 4 is provided with a shearing pin 7 for limiting the wall poking hook 6.
In more detail, the lead-in groove 3 is located 2m below the upper joint 1, has a length of 4m, and has an opening depth 2/5 of the diameter of the pipe body 2.
The width of the spiral body of the spiral sleeve 4 is 200mm, the interval is 100mm, and in order to ensure the yield and the extension strength of the spiral sleeve 4, the spiral body of the spiral sleeve 4 is preferably four circles.
The length of the wall pulling hook 6 is equal to the radius of the broken sleeve.
In addition, in this embodiment, the size of the wall-pulling hook 6 is further optimized on the basis of the second embodiment, specifically:
in the present embodiment, the width of the toggle 6 is controlled to be 100mm or more to increase the yield strength of the toggle 6.
Example four
Referring to fig. 1-2, the fishing and centering device for the broken casing comprises a pipe body 2, a wall shifting hook 6 and a pressure spring 5, wherein an upper connector 1 is arranged at the upper end of the pipe body 2, and the upper connector 1 is used for connecting a fishing pipe column; a vertical introducing groove 3 is formed in the middle of the pipe body 2; the pipe body 2 below the lead-in groove 3 is a spiral sleeve 4, the wall shifting hook 6 is arc-shaped, and the tail end of the wall shifting hook is vertically and rotatably arranged at the lower end of the spiral sleeve 4 through a fixing pin 8; one end of a pressure spring 5 is connected with the top of the wall shifting hook 6, and the other end of the pressure spring is connected with the spiral sleeve 4 on the upper side of the wall shifting hook 6; under the condition of no external force, the wall shifting hook 6 is in a horizontal and straight state; the lower end of the screw sleeve 4 is provided with a shearing pin 7 for limiting the wall poking hook 6.
In more detail, the lead-in groove 3 is located 2m below the upper joint 1, has a length of 4m, and has an opening depth 2/5 of the diameter of the pipe body 2.
The width of the spiral body of the spiral sleeve 4 is 200mm, the interval is 100mm, and in order to ensure the yield and the extension strength of the spiral sleeve 4, the spiral body of the spiral sleeve 4 is preferably four circles.
The length of the wall-pulling hook 6 is equal to the radius of the broken sleeve, and the width of the wall-pulling hook is controlled to be more than 100mm so as to increase the yield strength of the wall-pulling hook 6.
In addition, in this embodiment, the structure of the upper joint 1 is optimally designed on the basis of the third embodiment, specifically:
in this embodiment, top connection 1 is the sleeve pipe screw thread, and the welding has the stopper in the screw thread upper end, and the effect of stopper is at rotatory salvage in-process, and the restriction sleeve pipe screw thread goes upward.
EXAMPLE five
Referring to fig. 1-2, the fishing and centering device for the broken casing comprises a pipe body 2, a wall shifting hook 6 and a pressure spring 5, wherein an upper connector 1 is arranged at the upper end of the pipe body 2, and the upper connector 1 is used for connecting a fishing pipe column; a vertical introducing groove 3 is formed in the middle of the pipe body 2; the pipe body 2 below the lead-in groove 3 is a spiral sleeve 4, the wall shifting hook 6 is arc-shaped, and the tail end of the wall shifting hook is vertically and rotatably arranged at the lower end of the spiral sleeve 4 through a fixing pin 8; one end of a pressure spring 5 is connected with the top of the wall shifting hook 6, and the other end is connected with the spiral sleeve 4 on the upper side of the wall shifting hook 6; under the condition of no external force, the wall poking hook 6 is in a horizontal and straight state; the lower end of the screw sleeve 4 is provided with a shearing pin 7 for limiting the wall poking hook 6.
In more detail, the lead-in groove 3 is located 2m below the upper joint 1, has a length of 4m, and has an opening depth of 2/5 times the diameter of the pipe body 2.
The width of the spiral body of the spiral sleeve 4 is 200mm, the interval is 100mm, and in order to ensure the yield and the extension strength of the spiral sleeve 4, the spiral body of the spiral sleeve 4 is preferably four circles.
The length of the wall-pulling hook 6 is equal to the radius of the broken sleeve, and the width of the wall-pulling hook is controlled to be more than 100mm so as to increase the yield strength of the wall-pulling hook 6.
The upper joint 1 is a sleeve thread, the upper end of the thread is welded with a limiting block, and the limiting block is used for limiting the upward movement of the sleeve thread in the rotary fishing process.
In addition, in this embodiment, the shear resistance of the shear pin 7 is defined on the basis of the fourth embodiment, specifically:
in the present example, the shear pin 7 has a shear resistance of 1000 KN; the diameter of the wall shifting hook 6 is long, certain pressure is given to the wall shifting hook 6 by the surface layer casing shoe, when the lifting force reaches 1000KN, the wall shifting hook 6 cuts the shearing pin 7, the wall shifting hook 6 is in a drooping state, and the capturing tool can smoothly lift out of the original casing.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides a wrong disconnected sleeve pipe is salvaged and is right device, includes the body, the upper end of body is equipped with top connection, its characterized in that: the pipe body below the introduction groove is a spiral sleeve, the wall shifting hook is arc-shaped, and the tail end of the wall shifting hook is vertically and rotatably installed at the lower end of the spiral sleeve; one end of the pressure spring is connected with the top of the wall shifting hook, and the other end of the pressure spring is connected with the spiral sleeve on the upper side of the wall shifting hook; under the condition of no external force, the wall poking hook is in a horizontal and straight state; the lower extreme of spiral shell is equipped with and provides spacing shearing pin for dialling the wall hook.
2. The broken casing fishing centralizer of claim 1, wherein: the introducing groove is positioned 2m below the upper joint, the length of the introducing groove is 4m, and the opening depth is 2/5 of the diameter of the pipe body.
3. The broken casing fishing and centering device of claim 1, wherein: the width of the spiral sleeve spiral body is 200mm, and the interval is 100 mm.
4. The broken casing fishing centralizer of claim 3, wherein: the spiral body of the spiral sleeve is four circles.
5. The broken casing fishing and centering device of claim 1, wherein: the length of the wall pulling hook is equal to the radius of the broken sleeve, and the width of the wall pulling hook is more than or equal to 100 mm.
6. The broken casing fishing centralizer of claim 1, wherein: the wall shifting hook is rotatably installed at the lower end of the spiral sleeve through a fixing pin.
7. The broken casing fishing centralizer of claim 1, wherein: the shear pin has a shear resistance of 1000 KN.
8. The broken casing fishing centralizer of claim 1, wherein: the upper joint is a screw thread, and the upper end of the upper joint is provided with a limiting block for limiting the upper joint to move upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221336445.3U CN217206379U (en) | 2022-05-31 | 2022-05-31 | Wrong broken casing pipe salvaging and centralizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221336445.3U CN217206379U (en) | 2022-05-31 | 2022-05-31 | Wrong broken casing pipe salvaging and centralizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217206379U true CN217206379U (en) | 2022-08-16 |
Family
ID=82780499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221336445.3U Active CN217206379U (en) | 2022-05-31 | 2022-05-31 | Wrong broken casing pipe salvaging and centralizing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217206379U (en) |
-
2022
- 2022-05-31 CN CN202221336445.3U patent/CN217206379U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2020034643A1 (en) | Drilling process of pressure-preserving cable core drilling machine for subsea natural gas hydrates | |
| US10450801B2 (en) | Casing windowing method and tool using coiled tubing | |
| US10989036B2 (en) | Drilling casing and method of performing fast drilling and completion of large-borehole multilateral well | |
| CN104169514A (en) | Drill bit for use in boring wellbore and subterranean fracturing | |
| CN105041255A (en) | Hole bottom combined drilling tool used for fishing broken falling objects in drilled hole and fishing method of hole bottom combined drilling tool | |
| CN102425371A (en) | Compound cave making method of open hole of coalbed gas well | |
| CN110700784A (en) | Electric control downhole pipe cutting tool | |
| CN112253040B (en) | Segmented rapid hole sealing method for coal mine top-breaking blasting drilling | |
| CN217206379U (en) | Wrong broken casing pipe salvaging and centralizing device | |
| CN108104752B (en) | Coring device and coring method for rock salt exploration engineering | |
| CN116838277A (en) | Impact press-in type rope coring drilling device and process | |
| CN108952665B (en) | Hydraulic slotting device of semi-submersible drilling platform or drilling ship | |
| CN112855027B (en) | Through type running-in method for deep sea expansion corrugated pipe | |
| CN201196045Y (en) | Down-hole jet stream decompression device | |
| CN204804733U (en) | Fusiformis drift size gauge tool instrument | |
| CN110005377B (en) | Method for building vertical well bottom chamber | |
| CN110685629A (en) | Tool for cleaning and fishing small-diameter underground rock slag in deep well section | |
| CN110725664A (en) | Slurry stopping mechanism for well sealing and well sealing method thereof | |
| CN207393146U (en) | Coal seam pipe laying takes out drilling machine drilling tool and uses its drilling machine | |
| CN110388190A (en) | A kind of drill assembly suitable for superhigh-temperature and-pressure well drilling and coring delivery | |
| CN217582091U (en) | Underground drilling-through scraping-milling integrated tool | |
| CN220059488U (en) | Geological coring drilling tool capable of realizing continuous drilling with casing | |
| CN217841589U (en) | Double-slip self-locking slope guiding device | |
| CN216240520U (en) | Downhole bailing barrel device | |
| CN220015054U (en) | Tray type PVC wall protection sleeve pipe discharging device capable of automatically recycling in drilling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |