CN214787278U - Downhole oil pipe punching tool - Google Patents
Downhole oil pipe punching tool Download PDFInfo
- Publication number
- CN214787278U CN214787278U CN202120795647.3U CN202120795647U CN214787278U CN 214787278 U CN214787278 U CN 214787278U CN 202120795647 U CN202120795647 U CN 202120795647U CN 214787278 U CN214787278 U CN 214787278U
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- China
- Prior art keywords
- piston
- punch
- inner cavity
- assembly
- hydraulic cylinder
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- 238000004080 punching Methods 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 18
- 230000000712 assembly Effects 0.000 claims description 12
- 238000000429 assembly Methods 0.000 claims description 12
- 239000003921 oil Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 12
- 239000010720 hydraulic oil Substances 0.000 description 11
- 238000005422 blasting Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/08—Cutting or deforming pipes to control fluid flow
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The downhole oil pipe punching tool is characterized in that closed liquid is filled in an inner cavity, a main piston is arranged at the upper end of the inner cavity, and the lower end of the inner cavity is communicated with the inner ends of a piston assembly and a punch assembly which can move in the radial direction respectively; when the main piston extrudes the inner cavity, the piston assembly and the punch assembly are pressed to move outwards in the radial direction, the outer end of the piston assembly supports the inner wall of the oil pipe, and the outer end of the punch assembly punches holes. The utility model changes the volume of the hydraulic cylinder by pulling the main piston, thereby changing the pressure in the inner cavity; when the main piston extrudes the inner cavity, the pressure of the inner cavity rises and ejects the starting piston assembly to support the inner wall of the oil pipe, and the pressure rises and ejects the punch assembly to complete oil pipe punching.
Description
Technical Field
The utility model relates to an oil gas field development instrument in the pit, specifically speaking are oil pipe instrument of punching in the pit.
Background
At present, in the development operation of petroleum and natural gas, because of tool blockage or sundries accumulation in a well, an oil pipe in the well and an outer annular space of the oil pipe need to be communicated to complete the operation of circular well washing and the like, and the oil pipe needs to be punched by the operation process. At present, a more method is adopted for blasting a perforating gun; the method has the great disadvantages that the blasting position of the perforating gun is not easy to determine, the shape of the blasting hole is uncertain, the blasting force can penetrate through the outer casing pipe while penetrating through the oil pipe when being improperly controlled, and the blasting explosive has potential safety hazards. These disadvantages are not compatible with the effectiveness and safety requirements of oil and gas operations.
Except for a perforating gun blasting method, the existing oil pipe puncher is of an inclined plane sliding groove type, namely, punching is started by shearing a shear pin. The mode has a complex structure and low punching success rate, and a steel wire tool needs to be violently pulled in the punching process, so that the tool is easy to fall off to cause safety accidents underground.
In order to complete the drilling of the oil pipe more effectively and safely, an oil pipe drilling tool is needed to be researched, so that the drilling operation of the underground oil pipe can be completed conveniently, simply, efficiently and safely, and the completion operation can be completed smoothly.
Disclosure of Invention
The utility model discloses a solve current problem, aim at providing an oil pipe instrument of punching in pit.
In order to achieve the above object, the utility model discloses a technical scheme include piston assembly, drift subassembly and inner chamber, wherein: the inner cavity is filled with closed liquid (hydraulic oil), the upper end of the inner cavity is provided with a main piston, and the lower end of the inner cavity is also respectively communicated with the inner ends of a piston assembly and a punch assembly which can move in the radial direction; when the main piston extrudes the inner cavity, the piston assembly and the punch assembly are pressed to move outwards in the radial direction, the outer end of the piston assembly supports the inner wall of the oil pipe, and the outer end of the punch assembly punches a hole; when in reposition, they are collected.
Wherein the piston assembly comprises a start piston disposed in an opening in a sidewall of the ram housing; the inner end of the actuating piston is connected with the inner cavity, and the outer end of the actuating piston can extend out of the opening.
The punch assembly comprises a punch piston, the punch piston is arranged in a side wall opening of a punch shell, and the outer end of the punch piston is connected with a punch; the inner end of the plunger is connected to the inner cavity and the outer end of the plunger extends out of the opening.
Wherein the punch is connected with the outer end of the punch piston through a punch holder.
Wherein, a plurality of piston assembly, a plurality of drift subassembly are the interval series connection, and for example the drift subassembly is put between two start piston assembly, guarantees to punch the process balance.
Wherein, a plurality of piston assemblies and a plurality of punch assemblies are communicated through the long holes.
The hydraulic cylinder is arranged at one end of the inner cavity, the piston head of the main piston is positioned at the lower end of the hydraulic cylinder at the beginning, an O-shaped ring is arranged between the outer wall of the piston head and the inner wall of the hydraulic cylinder, and the hydraulic cylinder is communicated with the lower end of the inner cavity through a small hole of the piston head; when the main piston moves upwards, liquid (hydraulic oil) is extruded to the lower end of the inner cavity from the hydraulic cylinder, and when the main piston resets, the liquid (hydraulic oil) flows back.
The hydraulic cylinder is connected with a punch shell through an outlet connector, and the punch shell is provided with a dry piston assembly and a plurality of punch assemblies which are connected in series at intervals; and a hydraulic control pipeline is arranged in the outlet joint, the upper end of the hydraulic control pipeline is communicated with the hydraulic cylinder through a small hole of the main piston, and the lower end of the hydraulic control pipeline is communicated with the inner cavity of the punch shell.
Wherein, the hydraulic control pipeline is fixed with the screw, prevents that it from deviating from in the process of moving, has improved product dynamic seal performance.
The piston rod of the main piston extends out of the upper end opening of the hydraulic cylinder, and a sealing assembly is arranged between the outer wall of the piston rod and the inner wall of the upper end opening of the hydraulic cylinder.
Wherein, the upper end of hydraulic cylinder is equipped with the adapter that punches for the instrument is effectively connected with the electric tool who uses in the cooperation.
Wherein, the sealing component comprises an O-shaped ring and retaining rings at two ends of the O-shaped ring.
Compared with the prior art, the volume of the hydraulic cylinder is changed by drawing the main piston, so that the pressure in the inner cavity is changed; when the main piston extrudes the inner cavity, the pressure of the inner cavity is increased and the starting piston assembly is ejected out to support the inner wall of the oil pipe, and the pressure is increased and the punch assembly is ejected out to complete the punching of the oil pipe; accessible electric tool has avoided the drawback that perforation blasting punched as the power supply that punches, has avoided the drawback that the steel wire jarring operation punched, combines piston hydraulic cylinder and the design of suppressing the subassembly, can effectual completion punching operation, has improved the operating efficiency that punches, provides convenient, succinct, environmental protection, safe oil pipe mode of punching.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a punch assembly;
referring to the drawings, 1-a punch adaptor, 2-a master piston, 3-a hydraulic cylinder, 4-an end plate, 5-a press ring, 6-a rubber ring, 7-an outlet coupling, 8-a punch housing, 9-a piston retainer, 10-a start piston, 11-an end cap, 12-a piston plate, 13-a punch piston, 14-a punch holder, 15-a punch, 16-a screw, 17-a retainer ring, 18-an O-ring, 19-a pilot line, 20-a retainer ring, 21-an O-ring, 22-a retainer ring, 23-an O-ring, 24-a retainer ring, 25-a plunger, 26-a retainer ring, 27-an O-ring, 28-a triangular seal ring, a press ring 29-a triangular seal rubber ring, 30-a flood plug, 31-a thread insert, 32-a retainer ring, 33-O-ring, 34-gland, 35-screw, 36-pin.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings.
Referring to fig. 1 and 2, fig. 1 and 2 show an embodiment of the present invention, which includes a hydraulic cylinder at an upper end and a punch housing at a lower end, the hydraulic cylinder being connected to the punch housing through an outlet fitting. Wherein the starting piston is arranged in an opening of the side wall of the punch shell to form a starting piston assembly; the starting piston is provided with a limiting step, and the piston retainer at the opening of the side wall can block the limiting step to limit the moving stroke of the piston retainer, so that the piston retainer is prevented from falling off. The inner end of the starting piston is communicated with the hydraulic oil in the inner cavity, and the outer end of the starting piston extends out of the opening.
The punch piston, the punch holder and the punch are arranged in the side wall opening of the punch shell to form a punch assembly; the starting piston assemblies and the punch head assemblies are connected in series at intervals, wherein the punch head assemblies are placed between the two starting piston assemblies, and the balance of the punching process is guaranteed. The inner end of the plunger of the punch is communicated with the hydraulic oil in the inner cavity, and the outer end of the plunger of the punch can extend out of the opening.
Preferably, the plunger is fixed to a plunger holder by means of a pin, and the plunger holder is connected to the outer end wall of the plunger.
The main piston is arranged in the hydraulic cylinder, a hydraulic control pipeline is arranged in the outlet joint, and the hydraulic cylinder is communicated with the punching assembly through the hydraulic control pipeline. The joint is provided with a gland to increase the strength. At the beginning, the piston head of the main piston is positioned at the lower end of the hydraulic cylinder, and the hydraulic cylinder is communicated with the lower end of the inner cavity through a small hole (positioned at the bottommost part of the hydraulic cylinder) of the piston head; when the main piston moves upwards, the hydraulic oil is extruded to the lower end of the inner cavity from the hydraulic cylinder, and when the main piston is reset, the hydraulic oil is reversely operated to enable the hydraulic oil to flow back.
The hydraulic cylinder is communicated with a hydraulic control pipeline through a small hole of the main piston, and the hydraulic control pipeline is connected with the inner section of the punching assembly to form a communicating inner cavity; because the inner cavities are all sealed by the sealing assembly, the inner cavities are closed inner cavities with good sealing performance.
Preferably, the punching adaptor is mounted on the uppermost end of the present embodiment by a screw so that the present embodiment can be effectively connected to a power tool used in cooperation therewith.
Preferably, the sealing assembly consisting of the pressing ring, the rubber ring and the pressing ring seals the hydraulic control pipeline, the rubber cylinder has certain interference with the design amount of the outer diameter of the hydraulic control pipeline, so that the sealing effect is achieved, and the narrow contact area improves the sealing effect and reduces friction; in addition, the sealing assembly is fixed by screws so as to prevent the sealing assembly from falling out in the movement process of the hydraulic control pipeline and improve the dynamic sealing performance of the product.
Due to the particularity of downhole tubing perforation, certain requirements also exist for the operation of the present embodiment. The punching tool needs to be conveniently put into a designated position, the steel wire operation difficulty is reduced, the operations such as jarring and lifting are reduced, and the tool is prevented from falling off after being vibrated. The hydraulic control pipeline adopts an electric mode to provide power, the punching adapter at the upper end of the hydraulic control pipeline is connected with an electric tool and is preferably connected with the electric tool in a sealing way through a check ring, an O-shaped ring, a triangular sealing press ring, a triangular sealing rubber ring, a flooding plug and the like.
The electric tool pushes and pulls the piston rod of the main piston to change the volume of the hydraulic cylinder, the inner cavity is filled with hydraulic oil, and the pressure at the lower end of the inner cavity is changed by changing the volume of the hydraulic cylinder.
Initially, the head of the main piston is at the bottom of the cylinder. When punching, the piston rod of the main piston is pulled and moves upwards, and because the sealing components (the retainer ring, the O-shaped ring, the retainer ring and the gland are arranged between the outer wall of the piston head and the inner wall of the hydraulic cylinder in sequence), the volume of the hydraulic cylinder lifted by the main piston is reduced, and hydraulic oil in the hydraulic cylinder is extruded into the piston component in the punch shell and the inner end of the punch component from the small hole on the piston head. Due to the flowing of the hydraulic oil, the pressure of the inner ends of the piston assembly and the punch assembly is increased, the volume of the inner ends of the piston assembly and the punch assembly is increased, and the punch piston and the starting piston are respectively pushed to move outwards along the radial direction. At the moment, the piston assembly extends out of the tool to support the inner wall of the oil pipe, the pressure rises to extend out of the tool and the punch assembly is ejected out to complete oil pipe punching.
Preferably, the lower end of the punch shell is provided with an end cover, and the end cover is provided with an opening. Over the opening, the plunger is sealed thereto by a collar.
Preferably, the side wall opening of the punch shell is provided with a piston plate, and the piston plate can limit the punch piston to avoid falling off.
Preferably, the inner end of the starting piston is sealed with the inner cavity through a check ring and an O-shaped ring.
Preferably, a piston rod of the main piston extends out of an opening at the upper end of the hydraulic cylinder, and a sealing assembly is arranged between the outer wall of the piston rod and the inner wall of the opening at the upper end of the hydraulic cylinder; the sealing assembly specifically comprises a check ring and an O-shaped ring, and the check ring and the O-shaped ring are respectively arranged on the hydraulic cylinder and the main piston and are used for sealing the hydraulic cylinder.
This embodiment leads to with the help of electric tool, can improve operating pressure in the pit by a wide margin, reduces the steel wire jarring operation, avoids the instrument risk in the pit that drops. The hydraulic punching mode is different from the existing inclined plane sliding rail structure, and the success rate of punching operation is improved. The operation process can be embodied conveniently through steel wire operation, the operation is embodied simply through the operation of the ground electric control device, the environment is embodied without slurry pollution in the operation process, and the operation process is embodied safely without gunpowder.
The embodiments of the present invention have been described in conjunction with the accompanying drawings and examples, the structures of which are not intended to limit the present invention, and those skilled in the art can make modifications as required, and all changes and modifications within the scope of the appended claims are within the scope of protection.
Claims (10)
1. The utility model provides a downhole oil pipe instrument of punching which characterized in that: including piston assembly, drift subassembly and inner chamber, wherein:
the inner cavity is filled with closed liquid, the upper end of the inner cavity is provided with a main piston, and the lower end of the inner cavity is also respectively communicated with the inner ends of a piston assembly and a punch assembly which can move in the radial direction;
when the main piston extrudes the inner cavity, the piston assembly and the punch assembly are pressed to move outwards in the radial direction, the outer end of the piston assembly supports the inner wall of the oil pipe, and the outer end of the punch assembly punches holes.
2. The downhole tubing perforating tool of claim 1, wherein: the piston assembly comprises a starting piston which is arranged in an opening of the side wall of the punch shell; the inner end of the actuating piston is connected with the inner cavity, and the outer end of the actuating piston can extend out of the opening.
3. The downhole tubing perforating tool of claim 1, wherein: the punch assembly comprises a punch piston, the punch piston is arranged in a side wall opening of the punch shell, and the outer end of the punch piston is connected with the punch; the inner end of the plunger is connected to the inner cavity and the outer end of the plunger extends out of the opening.
4. The downhole tubing perforating tool of claim 3, wherein: the punch is connected with the outer end of the punch piston through a punch holder.
5. The downhole tubing perforating tool of claim 1, wherein: the plurality of piston assemblies and the plurality of punch assemblies are connected in series at intervals.
6. The downhole tubing perforating tool of claim 5, wherein: the plurality of piston assemblies and the plurality of punch assemblies are communicated through the long holes.
7. A downhole tubing perforating tool as claimed in any of claims 1 to 6, wherein: a hydraulic cylinder is arranged at one end of the inner cavity, a piston head of the main piston is positioned at the lower end of the hydraulic cylinder at the beginning, and the hydraulic cylinder is communicated with the lower end of the inner cavity through a small hole of the piston head; when the main piston moves upwards, liquid is extruded to the lower end of the inner cavity from the hydraulic cylinder, and the liquid flows back when the main piston is reset.
8. The downhole tubing perforating tool of claim 7, wherein: the hydraulic cylinder is connected with a punch shell through an outlet connector, and the punch shell is provided with a dry piston assembly and a plurality of punch assemblies which are connected in series at intervals; and a hydraulic control pipeline is arranged in the outlet joint, the upper end of the hydraulic control pipeline is communicated with the hydraulic cylinder through a small hole of the main piston, and the lower end of the hydraulic control pipeline is communicated with the inner cavity of the punch shell.
9. The downhole tubing perforating tool of claim 7, wherein: a piston rod of the main piston extends out of an upper end opening of the hydraulic cylinder, and a sealing assembly is arranged between the outer wall of the piston rod and the inner wall of the upper end opening of the hydraulic cylinder.
10. A downhole tubing perforating tool as claimed in claim 7 or 8, wherein: and a punching adapter is arranged at the upper end of the hydraulic cylinder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022718582 | 2020-11-23 | ||
| CN2020227185820 | 2020-11-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214787278U true CN214787278U (en) | 2021-11-19 |
Family
ID=78687645
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110418169.9A Pending CN114526028A (en) | 2020-11-23 | 2021-04-19 | Downhole oil pipe punching tool |
| CN202120795647.3U Active CN214787278U (en) | 2020-11-23 | 2021-04-19 | Downhole oil pipe punching tool |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110418169.9A Pending CN114526028A (en) | 2020-11-23 | 2021-04-19 | Downhole oil pipe punching tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN114526028A (en) |
-
2021
- 2021-04-19 CN CN202110418169.9A patent/CN114526028A/en active Pending
- 2021-04-19 CN CN202120795647.3U patent/CN214787278U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114526028A (en) | 2022-05-24 |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |