CN117627586A - Cable-free setting soluble ball seat plugging device and fracturing string - Google Patents
Cable-free setting soluble ball seat plugging device and fracturing string Download PDFInfo
- Publication number
- CN117627586A CN117627586A CN202210994786.8A CN202210994786A CN117627586A CN 117627586 A CN117627586 A CN 117627586A CN 202210994786 A CN202210994786 A CN 202210994786A CN 117627586 A CN117627586 A CN 117627586A
- Authority
- CN
- China
- Prior art keywords
- fracturing
- sliding sleeve
- cable
- soluble ball
- plugging device
- 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.)
- Pending
Links
- 238000010276 construction Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 20
- 230000000694 effects Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 230000009466 transformation Effects 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000002195 soluble material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007281 self degradation Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Clamps And Clips (AREA)
Abstract
The invention discloses a cable-free setting soluble ball seat plugging device and a fracturing string, comprising n-level fracturing sliding sleeves which are sequentially connected in series from bottom to top; the fracturing sliding sleeve comprises an outer cylinder and an inner sliding sleeve cylinder, an inner connecting channel and an outer connecting channel are formed in the upper end of the outer cylinder, the inner sliding sleeve cylinder is sleeved and connected in the outer cylinder, annular clamping grooves are formed in the inner wall of the inner sliding sleeve cylinder, and the widths of the clamping grooves on each stage of fracturing sliding sleeve are sequentially increased from top to bottom; during the fracturing construction, set up the soluble ball seat plugging device of cable-free setting in the sliding sleeve inner tube of corresponding level according to the fracturing level, open corresponding level sliding sleeve and realize multilayer stepless fracturing to corresponding reservoir fracturing, improve the layering transformation level of reservoir greatly.
Description
Technical Field
The invention relates to the technical field of oilfield drilling tools, in particular to a cable-free setting soluble ball seat plugging device and a fracturing string, which are suitable for staged fracturing of a well completion of an oil-gas field sliding sleeve.
Background
The existing infinite-stage fracturing sliding sleeve mainly comprises two modes of ball throwing and opening and packer matching and opening. The mechanical structure of the infinite-level sliding sleeve with the ball throwing opening is complex, the field construction success rate is lower than that of the conventional finite-level sliding sleeve, and the problem that the pipe column has a diameter shrinkage after fracturing exists; the packer is matched with an infinite-level sliding sleeve which is opened, so that no diameter shrinkage of a pipe column after pressing can be realized, but the pipe column of the packer needs to be put down, so that the construction cost is high, the construction procedure is complex, the positioning depth correction difficulty is high, and the general length of the sliding sleeve tool is long and the risk of putting down a drill is high.
Disclosure of Invention
The invention aims to solve the problem that an infinite-stage sliding sleeve fracturing tool with an opened packer matched with the existing packer needs to lower a packer tubular column. Therefore, the invention provides a cable-free setting soluble ball seat plugging device, the tool is directly conveyed to a preset position in a hydraulic pumping mode without a packer pipe column, a sliding sleeve is opened, then the plugging device is directly fractured, self-degradation is carried out after the plugging device is pressed, and the well bore is restored to the full-diameter.
The invention is realized by the following technical scheme:
a cable-free setting soluble ball seat plugging device comprises a core tube, a soluble ball, a reducing sealing ring, a fixed cylinder and a positioning block;
the core tube comprises a conical tube section and a straight tube section which are coaxial and are communicated with each other, the fixed tube is fixedly sleeved on the outer wall of the straight tube section of the core tube, the positioning block is arranged on the side wall of the fixed tube and slides in the radial direction of the core tube away from the center of the core tube under pressure, and the positioning block slides to the outside of the core tube and is used for being clamped with the clamping groove of the inner tube of the sliding sleeve;
the soluble ball is arranged in the inner hole of the taper pipe section and can axially move, the reducing sealing ring is sleeved on the outer wall of the taper pipe section, and when the fracturing construction is performed under the action of pressure, the reducing sealing ring deforms and seals a gap between the core pipe and the inner pipe of the sliding sleeve, and meanwhile the soluble ball seals the inner hole of the core pipe;
each stage of fracturing sliding sleeve in the fracturing tubular column is provided with a clamping groove matched with a positioning block, and the widths of the clamping grooves of two adjacent fracturing sliding sleeves are sequentially reduced from top to bottom; during the fracturing construction, according to the draw-in groove width of predetermined level fracturing sliding sleeve, throw into in the fracturing tubular column and be equipped with the cable of exempting from to sit and seal soluble ball seat plugging device of locating piece corresponding with the draw-in groove, this cable of exempting from sits and seal soluble ball seat plugging device's locating piece and the draw-in groove joint of this fracturing sliding sleeve under the pressure effect.
Preferably, a gap is arranged between the fixed cylinder and the core tube, an elastic device is arranged in the gap, the elastic device is positioned at the end part of the positioning block, and the positioning block is moved towards the direction of the inner tube of the sliding sleeve through elasticity.
Preferably, the elastic device is a plate spring, two ends of the plate spring are connected with the outer wall of the core tube, and the middle part of the bulge of the plate spring is abutted with the end part of the positioning block.
Preferably, a positioning device is arranged in front of the leaf spring and the outer wall of the core tube, one side of the positioning device is in contact with the core tube, a fixing groove is formed in the other side of the positioning device, and two ends of the leaf spring are arranged in the fixing groove.
Preferably, the positioning device is an arc-shaped positioning block.
Preferably, a plurality of positioning blocks are circumferentially arranged on the fixed cylinder.
Preferably, the end part of the straight pipe section of the core pipe is connected with a tailstock, one end of the fixed cylinder is abutted against the tailstock, and the other end of the fixed cylinder is abutted against the end surface of the reducing sealing ring.
Preferably, a pressing cap is arranged at the end part of the inner hole of the vertebral segment, and a plurality of fluid holes are formed in the pressing cap.
Preferably, the core tube, the soluble ball and the fixed cylinder are made of soluble metal materials.
The fracturing string has n fracturing layers and comprises n stages of fracturing sliding sleeves which are sequentially connected in series from bottom to top;
the fracturing sliding sleeve comprises an outer cylinder and an inner sliding sleeve cylinder, an inner connecting channel and an outer connecting channel are formed in the upper end of the outer cylinder, the inner sliding sleeve cylinder is sleeved and connected in the outer cylinder, annular clamping grooves are formed in the inner wall of the inner sliding sleeve cylinder, and the widths of the clamping grooves on each stage of fracturing sliding sleeve are sequentially increased from top to bottom;
during the fracturing construction, the cable-free setting soluble ball seat plugging device is arranged in the sliding sleeve inner cylinder of the corresponding stage according to the fracturing stage number.
Compared with the prior art, the invention has the following beneficial technical effects:
the cable-free setting soluble ball seat plugging device is suitable for staged fracturing of an infinite-stage full-diameter sliding sleeve completion of an oil-gas field, is matched with the infinite-stage full-diameter sliding sleeve to be used, a packer pipe column of a special sliding sleeve switch is not required to be put down, only the corresponding cable-free setting soluble ball seat plugging device is required to be hydraulically pumped, when a positioning block is clamped on an inner cylinder of the corresponding sliding sleeve, the displacement is increased, the self setting can be carried out, the construction efficiency is greatly improved, the tripping risk and the cost are reduced, the plugging device does not need to throw balls, pump fracturing is directly carried out after setting, fracturing fluid is saved, pumping time is saved, in addition, the plugging device is processed by soluble materials, plugging tools can be automatically degraded in a shaft after fracturing, the diameter of the shaft is recovered, and the later operation of the well switch sliding sleeve is facilitated.
According to the fracturing pipe column provided by the invention, the clamping grooves with different widths are formed in the inner barrel of each level of sliding sleeve from top to bottom according to the fracturing level, the corresponding cable-free setting soluble ball seat plugging device is arranged in the inner barrel of the sliding sleeve of the corresponding level according to the fracturing level, the sliding sleeve of the corresponding level is opened, the corresponding oil layer is fractured, multi-layer stepless fracturing is realized, and the layering transformation level of the oil layer is greatly improved.
Drawings
Fig. 1 is a schematic diagram of the pumping state of the cable-free setting soluble ball seat plugging device of the present invention.
Figure 2 is a schematic cross-sectional view of a cable-free setting soluble ball seat plugging device A-A of the present invention.
Fig. 3 is a schematic view showing a sealing state of the cable-free setting soluble ball seat plugging device.
In the figure: 1. pressing the cap; 2. a core tube; 3. a soluble sphere; 4. a reducing ring; 5. a fixed cylinder; 6. a positioning block; 7. a plate spring fixing cylinder; 8. a leaf spring; 9. and a tailstock.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings, which illustrate but do not limit the invention.
Referring to fig. 1-2, a cable-free setting soluble ball seat plugging device comprises a core tube 2, a soluble ball 3, a reducing sealing ring 4, a fixed cylinder 5 and a positioning block 6.
The core pipe comprises a conical pipe section and a straight pipe section which are coaxial and communicated with each other, the fixed cylinder 5 is fixedly sleeved on the outer wall of the straight pipe section of the core pipe, the positioning block 6 is arranged on the side wall of the fixed cylinder 5 and can slide along the radial direction of the core pipe in a direction away from the center of the core pipe, and the positioning block slides to the outside of the core pipe as a clamping groove for clamping the inner pipe of the sliding sleeve.
The soluble ball 3 is arranged in an inner hole of the conical pipe section, the reducing sealing ring 4 is sleeved on the outer wall of the conical pipe section, when the fracturing construction is carried out, the reducing sealing ring 4 deforms and seals a gap between the core pipe and the inner pipe of the sliding sleeve under the action of pressure, and meanwhile the soluble ball 3 seals the inner hole of the core pipe.
An annular gap is arranged between the fixed cylinder 5 and the core tube, an elastic device is arranged in the annular gap, the elastic device is positioned at the end part of the positioning block 6, and the positioning block 6 moves towards the direction of the inner tube of the sliding sleeve through the elasticity of the elastic device.
The elastic device comprises a plate spring 8 and a positioning device, wherein the positioning device is arranged on the outer wall of the core tube and positioned in the fixed cylinder 5, a fixed groove is formed in the positioning device, the plate spring 8 is an arc-shaped spring plate, two ends of the plate spring 8 are connected with the fixed groove, and the protruding middle part of the plate spring 8 is abutted against the end part of the positioning block 6.
The locating device is a locating block, the locating block is tightly attached to the outer wall of the straight pipe section of the core pipe, in the embodiment, a plurality of locating blocks 6 are circumferentially arranged on the fixed cylinder, each locating block is connected with the core pipe through one locating device, a clamping groove for matching the locating block is formed in the inner wall of the inner pipe of the sliding sleeve, and under the action of elastic force, the end part of the locating block is clamped with the clamping groove, so that the plugging tool and the inner pipe of the sliding sleeve are fixed.
The end of the straight pipe section of the core pipe is connected with a tailstock 9 through external threads, one end of a fixed cylinder 5 is abutted on the tailstock 9, and the other end of the fixed cylinder 5 is abutted on the end face of the reducing sealing ring 4, so that the axial positioning of the fixed cylinder is realized.
The inner hole end of the cone pipe section of the core pipe is provided with a pressing cap 1, the pressing cap is connected with the inner hole through threads, the pressing cap 1 is a cylinder, the outer surface of the cylinder is provided with external threads, 3-4 through holes are uniformly distributed along the axial direction on the pressing cap 1, the pressing cap 1 is connected with the upper end of the core pipe 2 through threads, and the pressing cap is used for limiting the soluble ball 3 and avoiding the separation of the soluble ball 3 and the cone pipe section.
The diameter of the soluble ball is smaller than the maximum diameter of the cone pipe section and larger than the minimum diameter of the cone pipe section, the diameter of the soluble ball is smaller than the length of the inner hole of the cone pipe section, the soluble ball 3 is a spherical body processed by adopting a soluble material, and the soluble ball 3 and the inner hole of the cone pipe section form a seal, so that the upper pressure can be sealed.
The reducing sealing ring 4 is a circular ring with a taper hole inside, the taper of the taper hole is the same as that of the cone pipe section of the core pipe, when fracturing is carried out, the core pipe moves under pressure, the cone pipe section moves downwards, the opposite reducing sealing ring 4 moves towards the large end of the cone pipe section and deforms until the outer side wall of the reducing sealing ring 4 is abutted with the inner wall of the inner pipe of the sliding sleeve, and the inner pipe of the sliding sleeve is sealed.
The fixed cylinder 5 is of a cylinder structure, 3-6 rectangular through holes are uniformly distributed at the lower end of the cylinder along the radial direction, the through holes are two sections of step holes, the rectangular holes close to the inner side are large, the rectangular holes close to the outer side are small, a positioning boss is arranged on the side wall of one end, close to the core tube, of the positioning block and is positioned in the large hole of the step hole, and the positioning hole is prevented from being separated from the step hole. The positioning block 6 is made of wear-resistant materials and is made of ceramic or hard alloy materials.
The locating block 7 is an arc-shaped block, the arc-shaped block is tightly attached to the outer wall of the straight hole end of the core tube through a plate spring, the upper end of the locating block 7 is abutted with the tailstock, and the lower end of the locating block is abutted with the outer wall of the cone section of the core tube through an inclined plane to form axial locating.
The tailstock 9 is a stepped cylinder, the outer diameter of the upper section of the cylinder is small, and the outer diameter of the lower section of the cylinder is large. The upper section of the inner hole of the tailstock 9 is provided with internal threads for connecting the lower end of the core tube 2.
The pressing cap 1, the core tube 2, the soluble ball 3, the fixed cylinder 5, the positioning block 7 and the tailstock 9 are all made of soluble metal materials, and the reducing sealing ring 4 is made of elastic materials.
The fracturing sliding sleeve comprises an outer cylinder and a sliding sleeve inner cylinder, an inner connecting channel and an outer connecting channel are formed in the upper end of the outer cylinder, the sliding sleeve inner cylinder is sleeved and connected in the outer cylinder, and an annular clamping groove is formed in the inner wall of the sliding sleeve inner cylinder.
The utility model provides a same diameter fracturing string, include by supreme multistage fracturing sliding sleeve of series connection in proper order down, the fracturing sliding sleeve includes urceolus and sliding sleeve inner tube, the inside and outside connecting channel has been seted up to the upper end of urceolus, the sliding sleeve inner tube cover is established and is connected in the urceolus, annular draw-in groove sets up on the inner wall of sliding sleeve inner tube, and the draw-in groove width top-down on every fracturing sliding sleeve increases gradually, through dropping into the soluble ball seat plugging device of cable seat that exempts from of corresponding width locating piece, open the sliding sleeve at every level in proper order, to corresponding oil reservoir fracturing, realize multistage stepless fracturing, improve the layering transformation progression of oil reservoir greatly.
The working principle of the cable-free setting soluble ball seat plugging device provided by the invention is described in detail below.
Pumping state:
the cable-free setting soluble ball seat plugging device is arranged in the inner tube of the sliding sleeve, the cable-free setting soluble ball seat plugging device is arranged in an initial device, the positioning block 6 is tightly attached to the inner wall of the inner tube of the sliding sleeve under the support of the plate spring 8, and the outer diameter of the rest part is 4-6mm smaller than the inner diameter of the sleeve.
Sealing state:
referring to fig. 3, when the cable-free setting soluble ball seat plugging device descends to the corresponding sliding sleeve position, namely, when the positioning hole and the corresponding clamping groove are located at the same height, the positioning hole slides under the action of the plate spring, the end part of the positioning hole is clamped into the clamping groove of the sliding sleeve inner tube, the top of the cable-free setting soluble ball seat plugging device is realized, namely, the cable-free setting soluble ball seat plugging device cannot continue descending, the displacement is unchanged, the ground pumping pressure can rise by 2-3 MPa due to throttling effect, the displacement is continuously increased, when the pumping pressure is increased to about 10 MPa, the cable-free setting soluble ball seat plugging device starts to seat, the variable diameter sealing ring 4 and the plate spring fixing sleeve 7 move downwards under the action of pressure, when the variable diameter sealing ring 44 is completely expanded to the inner diameter of the inner tube, the wellhead pressure is continuously increased, the cable-free setting soluble ball seat plugging device drives the sliding sleeve inner tube to move downwards, the sliding sleeve is opened when the pumping pressure is increased to about 20MPa, and the metal self-fracturing fully-degradable fully-fractured fully-degradable fully after the fracturing metal well bore is started.
The invention belongs to the technical field of oilfield drilling tools, and discloses a cable-free setting soluble ball seat plugging device which is mainly suitable for staged fracturing of an infinite-stage full-drift-diameter sliding sleeve completion of an oil-gas field. The invention is matched with an infinite-level full-diameter sliding sleeve for use, a packer pipe column of a special sliding sleeve switch is not required to be put into, and only the corresponding cable-free setting soluble ball seat plugging device is required to be hydraulically pumped, so that the construction efficiency is greatly improved, the tripping risk and the cost are reduced, the self-degradation is carried out after the pressure, the full-diameter of a shaft is recovered, and the problems of high construction cost, complex construction procedure and high tripping risk caused by the fact that the packer is matched with the infinite-level sliding sleeve which is opened and the packer pipe column is required to be put into are solved; secondly, no cable setting tool is needed, and when the positioning block is clamped on the corresponding sliding sleeve inner cylinder, the displacement is improved, so that the self-setting can be realized. In addition, the plugging device does not need to throw balls, pump fracturing is directly carried out after setting, fracturing fluid is saved, pumping time is saved, the problem that an infinite-level sliding sleeve mechanical structure which is opened by throwing balls at present is complex, the field construction success rate is lower than that of a conventional finite-level sliding sleeve, and a pipe column has a diameter reduction after fracturing is solved. The plugging device is processed by soluble materials, and the tool can be automatically degraded in a shaft after being pressed, so that the diameter of the shaft is recovered, and the plugging device is beneficial to the operations of a switch sliding sleeve and the like of re-entering the shaft in the later period.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The cable-free setting soluble ball seat plugging device is characterized by comprising a core tube (2), a soluble ball (3), a reducing sealing ring (4), a fixed cylinder (5) and a positioning block (6);
the core tube comprises a conical tube section and a straight tube section which are coaxial and are communicated with each other, a fixed tube (5) is fixedly sleeved on the outer wall of the straight tube section of the core tube, and a positioning block (6) is arranged on the side wall of the fixed tube (5) and slides in the radial direction of the core tube away from the center of the core tube under pressure;
the soluble ball (3) is arranged in the inner hole of the conical pipe section and can axially move, the reducing sealing ring (4) is sleeved on the outer wall of the conical pipe section, when the fracturing construction is performed under the action of pressure, the reducing sealing ring (4) deforms and seals the gap between the core pipe and the inner pipe of the sliding sleeve, and meanwhile the soluble ball (3) seals the inner hole of the core pipe;
each stage of fracturing sliding sleeve in the fracturing tubular column is provided with a clamping groove matched with a positioning block, and the widths of the clamping grooves of two adjacent fracturing sliding sleeves are sequentially reduced from top to bottom; during the fracturing construction, according to the draw-in groove width of predetermined level fracturing sliding sleeve, throw into in the fracturing tubular column and be equipped with the cable of exempting from to sit and seal soluble ball seat plugging device of locating piece corresponding with the draw-in groove, this cable of exempting from sits and seal soluble ball seat plugging device's locating piece and the draw-in groove joint of this fracturing sliding sleeve under the pressure effect.
2. The cable-free setting soluble ball seat plugging device according to claim 1, wherein a gap is arranged between the fixed cylinder (5) and the core tube, an elastic device is arranged in the gap, the elastic device is positioned at the end part of the positioning block (6), and the positioning block (6) is moved towards the direction of the inner tube of the sliding sleeve through elasticity.
3. The cable-free setting soluble ball seat plugging device according to claim 2, wherein the elastic device is a plate spring (8), two ends of the plate spring (8) are connected with the outer wall of the core tube, and the protruding middle part of the plate spring (8) is abutted with the end part of the positioning block (6).
4. A cable-free setting soluble ball seat plugging device according to claim 3, wherein a positioning device is arranged in front of the leaf spring (8) and the outer wall of the core tube, one side of the positioning device is in contact with the core tube, the other side of the positioning device is provided with a fixing groove, and two ends of the leaf spring are arranged in the fixing groove.
5. The cable-free setting soluble ball seat plugging device of claim 4, wherein said positioning means is an arcuate positioning block.
6. The cable-free setting soluble ball seat plugging device according to claim 1, wherein a plurality of positioning blocks (6) are circumferentially arranged on the fixed cylinder.
7. The cable-free setting soluble ball seat plugging device according to claim 1, wherein the end part of the straight pipe section of the core pipe is connected with a tail seat (9), one end of a fixed cylinder (5) is abutted against the tail seat (9), and the other end of the fixed cylinder (5) is abutted against the end face of the reducing sealing ring (4).
8. The cable-free setting soluble ball seat plugging device according to claim 1, wherein a pressure cap (1) is arranged at the end part of the inner hole of the vertebral tube section, and a plurality of fluid holes are formed in the pressure cap (1).
9. The cable-free setting soluble ball seat plugging device according to claim 1, wherein the core tube (2), the soluble ball (3) and the fixing cylinder (5) are made of soluble metal materials.
10. The fracturing pipe column comprises n fracturing layers and is characterized by comprising n stages of fracturing sliding sleeves which are sequentially connected in series from bottom to top;
the fracturing sliding sleeve comprises an outer cylinder and an inner sliding sleeve cylinder, an inner connecting channel and an outer connecting channel are formed in the upper end of the outer cylinder, the inner sliding sleeve cylinder is sleeved and connected in the outer cylinder, annular clamping grooves are formed in the inner wall of the inner sliding sleeve cylinder, and the widths of the clamping grooves on each stage of fracturing sliding sleeve are sequentially increased from top to bottom;
when in fracturing construction, the cable-free setting soluble ball seat plugging device according to any one of claims 1-9 is put into the sliding sleeve inner cylinder of the corresponding stage according to the fracturing stage number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210994786.8A CN117627586A (en) | 2022-08-18 | 2022-08-18 | Cable-free setting soluble ball seat plugging device and fracturing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210994786.8A CN117627586A (en) | 2022-08-18 | 2022-08-18 | Cable-free setting soluble ball seat plugging device and fracturing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117627586A true CN117627586A (en) | 2024-03-01 |
Family
ID=90016998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210994786.8A Pending CN117627586A (en) | 2022-08-18 | 2022-08-18 | Cable-free setting soluble ball seat plugging device and fracturing string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117627586A (en) |
-
2022
- 2022-08-18 CN CN202210994786.8A patent/CN117627586A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101087926B (en) | expansion pig | |
| US20030042022A1 (en) | High pressure high temperature packer system, improved expansion assembly for a tubular expander tool, and method of tubular expansion | |
| CN105484695A (en) | Mechanical hydraulic double-acting expansion device suitable for expansion tube drilling | |
| CN108756812A (en) | Multistage fracturing sliding sleeve | |
| CN108301802B (en) | Rope core drill assembly | |
| CN211851765U (en) | Tension packer | |
| CN106761541B (en) | Hydraulic anchoring sealing device | |
| CN107620583B (en) | Liquid-drainage gas production string and production method thereof | |
| CN102966327A (en) | Expansion pipe | |
| CN110043237B (en) | Plug-in type sliding sleeve sand blaster and control method thereof | |
| CN111425148A (en) | Casing pipe column applying toe end sliding sleeve to full-bore sliding sleeve and using method of casing pipe column | |
| CN116816308A (en) | Oil-free pipe paraffin removal lifting device for small-bore shale oil well | |
| CN210293914U (en) | Sand control is with full tubular column oil pipe pressure testing instrument of safe environment-friendly | |
| CN117627586A (en) | Cable-free setting soluble ball seat plugging device and fracturing string | |
| CN109763784B (en) | Split bridge plug hydraulic setting tool and setting method thereof | |
| CN203308446U (en) | Multi-stage fracturing sliding sleeve free from opening in midway | |
| CN113898315B (en) | Unlimited-level switchable full-bore sliding sleeve assembly | |
| CN212428730U (en) | Shaft float switch | |
| CN116411907A (en) | Oil well fracturing device and process with sliding sleeve opening function | |
| CN211950434U (en) | Large-drift-diameter fracturing bridge plug | |
| CN111441741B (en) | Soluble pumpable open temporary plugging bridge plug tool and use method | |
| CN114320215A (en) | Hydraulic internal pressurization packer with expansion joint | |
| CN110847846B (en) | Packer for oil field exploitation | |
| CN114482958A (en) | Casing cementing full-bore infinite staged fracturing well completion device and fracturing well completion method thereof | |
| CN201310317Y (en) | Half-way well cementing tool without drilling plug |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |