CN111502575B - Hydraulic pressure starts formula packer deblocking instrument - Google Patents
Hydraulic pressure starts formula packer deblocking instrument Download PDFInfo
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- CN111502575B CN111502575B CN202010296045.3A CN202010296045A CN111502575B CN 111502575 B CN111502575 B CN 111502575B CN 202010296045 A CN202010296045 A CN 202010296045A CN 111502575 B CN111502575 B CN 111502575B
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- mandrel
- deblocking
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- joint
- upper piston
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- 238000010008 shearing Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000004075 alteration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002343 natural gas well Substances 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 230000009471 action Effects 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
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008092 positive effect Effects 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
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- 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)
Abstract
The invention discloses a hydraulic starting type packer deblocking tool, which is characterized in that: including dabber, top connection, lower clutch, go up the piston, lower piston and deblocking device, this instrument has non-deblocking state (initial condition) and two kinds of states of deblocking state, can be according to the operation needs, and the mode of suppressing through throwing the ball switches the instrument from non-deblocking state (initial condition) to the deblocking state to the deblocking packer. The invention solves the problem of one trip of running the recovery packer in the well completion operation and improves the efficiency of the downhole operation.
Description
Technical Field
The invention belongs to the technical field of petroleum and natural gas well completion, and particularly relates to a hydraulic starting type packer deblocking tool.
Background
In the technical field of petroleum and natural gas well completion, a special tool deblocking type packer is generally used for setting a setting after a feeding pipe column is set, and when deblocking is needed, a recovery pipe column is set for deblocking separately. Particularly, when the setting of the packer is in a setting state, the packer cannot be directly recovered by deblocking through the feeding pipe column, the feeding pipe column is firstly released, the feeding pipe column is taken out, and then the pipe column is recovered by deblocking. For a production well, the production string needs to be tripped out, and then a recovery string is independently tripped in to unseal the packer. The mode of recovering the packer by two times of pipe columns influences the operation efficiency.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a hydraulic starting type packer deblocking tool.
The utility model provides a hydraulic pressure starts formula packer deblocking tool which characterized in that: comprises a mandrel, an upper joint, a lower joint, an upper piston, a lower piston and an unsealing device;
the upper end of the mandrel is connected with the upper joint through threads, an upper piston cavity is formed between the mandrel and the inner wall of the upper joint, a through hole is formed at the upper end of the mandrel, and an axial groove is formed at the threaded connection part of the upper joint, so that liquid in an upper pipeline can be communicated with the upper piston cavity through the through hole and the axial groove;
the lower end of the mandrel is connected with the lower joint through threads, a lower piston cavity is formed between the mandrel and the inner wall of the lower joint, and a pressure transmission hole is formed in the position of the mandrel corresponding to the lower piston cavity, so that the lower piston cavity is communicated with the inside of the mandrel;
the upper piston and the lower piston are sleeved on the outer wall of the mandrel, the upper end of the upper piston extends into the upper piston cavity, the lower end of the lower piston extends into the lower piston cavity, the upper piston is fixedly connected with the mandrel through a starting shearing pin, and the upper piston is fixedly connected with the lower piston through a releasing shearing pin;
the lower piston is provided with a deblocking device, the deblocking device comprises a fastening pin, spring pieces and deblocking blocks, the spring pieces are arranged on two sides of the deblocking blocks, and the spring pieces are fixedly arranged on the lower piston through the fastening pin;
an upper trapezoidal groove, a boss and a lower trapezoidal groove are formed on the outer wall of the mandrel, the upper trapezoidal groove and the lower trapezoidal groove are respectively positioned on the upper side and the lower side of the boss, and the deblocking block is positioned in the upper trapezoidal groove in a non-deblocking state (initial state);
a necking neck is formed in the position, close to the upper end, inside the mandrel and serves as a ball seat when hydraulic starting and deblocking are conducted; a mandrel positioning step is formed on the mandrel, an upper piston positioning step is formed on the upper piston, and after the cutting-off of the cutting-off pin is started, the mandrel is limited to the upper piston through the matching effect of the mandrel positioning step and the upper piston positioning step.
In the technical scheme, the through holes are uniformly distributed along the circumference of the mandrel, the number of the through holes is 4, and the through holes are mutually 90 degrees; the axial grooves are uniformly distributed along the inner wall of the upper joint, the number of the axial grooves is 4, and the axial grooves are 90 degrees.
In the technical scheme, the number of the unsealing devices is 4, the unsealing devices are uniformly distributed around the circumference and form an angle of 90 degrees with each other.
In the above technical scheme, the deblocking block includes base and arch, and the base is circular-arcly, is provided with 2 archs on it, and the deblocking block is located 2 bellied middles with the tie point of spring leaf, and the spring leaf is inwards buckled, makes the deblocking block be in radial contraction state under non-deblocking state (initial condition).
The invention has the advantages and positive effects that: through adopting above-mentioned technical scheme, formed a hydraulic pressure start-up formula packer deblocking instrument, be different from prior art, this instrument has non-deblocking state (initial state) and deblocking state two kinds of states, can be according to the operation needs, through throwing the mode of ball and suppressing with the instrument from non-deblocking state (initial state) switch to the deblocking state to the deblocking packer. The invention solves the problem of one trip of running the recovery packer in the well completion operation and improves the efficiency of the downhole operation.
Drawings
FIG. 1 is a schematic diagram of the assembled state of a hydraulically activated packer unsetting tool of the present invention.
FIG. 2 is a schematic diagram of the unset state of a hydraulically actuated packer unset tool according to the present invention.
FIG. 3 is a schematic diagram of the structure of the hydraulic-activated packer unsetting tool in the hands-off state.
Fig. 4a is a schematic view of an upper joint structure.
Fig. 4b is a sectional view taken along the line a-a of fig. 4 a.
Fig. 5 is a schematic view of the upper piston structure.
Fig. 6a is a sectional view taken along the line a-a of fig. 6 b.
Fig. 6b is a schematic view of the lower piston structure.
Fig. 7 is a schematic view of the mandrel configuration.
FIG. 8 is a schematic view of the hydraulic-actuated packer unsetting tool of the present invention.
Fig. 9 is a partial structure diagram of a decapsulation block.
Wherein:
1 is an upper joint, 2 is an upper piston, 3 is a lower piston, 4 is a fastening pin, 5 is a spring piece, 6 is an unsealing block, 7 is a mandrel, 8 is a lower joint, 9 is a starting shearing pin, 9 'is a sheared starting shearing pin, 10 is a releasing shearing pin, 10' is a sheared releasing shearing pin, 11 is an upper piston cavity, 12 is a lower piston cavity, 13 is a plugging ball, and 14 is a gap;
1-1 is an internal thread, and 1-2 is an axial groove;
2-1 is an upper piston positioning step, 2-2 is an upper piston mounting hole of the starting shearing pin, and 2-3 is an upper piston mounting hole of the releasing shearing pin;
3-1 is an unsealing block mounting groove, and 3-2 is a lower piston mounting hole of the releasing shear pin;
6-1 is a base, and 6-2 is a bulge;
7-1 is a through hole, 7-2 is a reducing hole, 7-3 is a mandrel positioning step, 7-4 is a mandrel mounting hole for starting the shearing pin, 7-5 is an upper trapezoidal groove, 7-6 is a boss, 7-7 is a lower trapezoidal groove, and 7-8 is a pressure transmission hole.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the technical solutions of the present invention are further described below with reference to specific examples.
Examples
As shown in fig. 1 to 9, a hydraulic-activated packer unsetting tool comprises a mandrel 7, an upper joint 1, a lower joint 8, an upper piston 2, a lower piston 3 and an unset device;
the upper end of the mandrel 7 is connected with the upper connector 1 through threads, an upper piston cavity 11 is formed between the mandrel 7 and the inner wall of the upper connector 1, through holes 7-1 are formed in the upper end of the mandrel 7, the through holes 7-1 are uniformly distributed along the circumference of the mandrel 7, the number of the through holes 7-1 is 4, and the through holes are 90 degrees; an axial groove 1-2 is formed at the threaded connection part of the upper joint 1, so that liquid of an upper pipeline can be communicated with an upper piston cavity 11 through the through hole 7-1 and the axial groove 1-2; the axial grooves 1-2 are uniformly distributed along the inner wall of the upper joint 1, the number of the axial grooves is 4, and the axial grooves are 90 degrees.
The lower end of the mandrel 7 is connected with the lower joint 8 through threads, a lower piston cavity 12 is formed between the mandrel 7 and the inner wall of the lower joint 8, and pressure transmission holes 7-8 are formed in positions of the mandrel 7 corresponding to the lower piston cavity 12, so that the lower piston cavity 12 is communicated with the inside of the mandrel 7;
the upper piston 2 and the lower piston 3 are sleeved on the outer wall of the mandrel 7, the upper end of the upper piston 2 extends into an upper piston cavity 11, the lower end of the lower piston 3 extends into a lower piston cavity 12, the upper piston 2 is fixedly connected with the mandrel 7 through a starting shearing pin 9, and the upper piston 2 is fixedly connected with the lower piston 3 through a releasing shearing pin 10;
the lower piston 3 is provided with 4 groups of unsealing devices which are uniformly distributed around the circumference and form an angle of 90 degrees with each other; the unsealing device comprises a fastening pin 4, a spring piece 5 and an unsealing block 6, wherein the spring piece 5 is arranged on two sides of the unsealing block 6, and the spring piece 5 is fixedly arranged on the lower piston 3 through the fastening pin 4;
an upper trapezoidal groove 7-5, a boss 7-6 and a lower trapezoidal groove 7-7 are formed in the outer wall of the mandrel 7, the upper trapezoidal groove 7-5 and the lower trapezoidal groove 7-7 are respectively located on the upper side and the lower side of the boss 7-6, the deblocking block 6 comprises a base 6-1 and a protrusion 6-2, the base 6-1 is arc-shaped, 2 protrusions 6-2 are arranged on the base, the connection point of the deblocking block 6 and the spring piece 5 is located in the middle of the 2 protrusions 6-2, and the spring piece 5 is bent inwards to enable the deblocking block 6 to be clamped in the upper trapezoidal groove 7-5 in a radial contraction state under a non-deblocking state (an initial state);
a necking 7-2 is formed in the position, close to the upper end, in the mandrel and is used as a ball seat for hydraulic starting and unsealing; a mandrel positioning step 7-3 is formed on the mandrel 7, an upper piston positioning step 2-1 is formed on the upper piston 2, and after the cutting-off of the cutting-off pin 9 is started, the mandrel positioning step 7-3 and the upper piston positioning step 2-1 are matched to limit the upper piston 2 by the mandrel 7.
A method for using a hydraulic starting type packer deblocking tool comprises a deblocking process and a releasing process, and comprises the following steps:
referring to fig. 2, a structure diagram of the unset state of a hydraulic-activated packer unset tool is shown. When the packer needs to be unsealed, a plugging ball 13 is thrown in from a well mouth, the plugging ball 13 is located on a necking 7-2 of a mandrel 7, because the inner diameter of the necking 7-2 is smaller than the diameter of the plugging ball 13, the plugging ball 13 cannot pass through the necking 7-2, at this time, the plugging ball 13 blocks a downward channel of liquid to generate downward hydraulic pressure, the liquid enters an upper piston cavity 11 through a through hole 7-1 of the mandrel 7 and an axial groove 1-2 of an upper joint 1, the axial thrust of the liquid cuts a starting cutting pin 9, the upper piston 2 moves downwards, an upper piston positioning step 2-1 on the upper piston 2 is attached to a mandrel positioning step 7-3 on the mandrel 7, the upper piston shaft 2 is positioned, a gap 14 is generated between the upper piston 2 and the upper joint 1 at this time, the liquid in the pipe enters an outer annulus through the through hole 7-1 of the mandrel 7, the gap 14 generated between the upper piston 2 and the upper joint 1, the fluid channel is opened. In the descending process of the upper piston 2, the lower piston 3 is pushed to descend, the lower piston 3 pushes the deblocking block 8 to move to the boss 7-6 of the mandrel 7, and the deblocking block 8 is opened. And lifting the tool, unsealing the packer by the unsealing block 8, and continuously lifting to recover the packer to the ground.
Referring to fig. 3, a structure of a hydraulic activated packer releasing tool in a releasing state is schematically shown. When the tool is in the unsealing state, the packer cannot be unsealed by lifting or the packer is blocked after unsealing, and the pipe column cannot be recovered, the hand-off shear pin 10 is cut off by lifting a certain pulling force, the unsealing block 8 moves downwards relative to the mandrel 7, the unsealing block slides into the lower trapezoidal groove 7-7 of the mandrel 7, the unsealing block 8 retracts under the action of the spring piece 5 and the fastening pin 4, and the whole pipe string can be taken out from the underground.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed and operated in specific orientations, and thus, should not be construed as limiting the present invention.
In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The invention being thus described by way of example, it should be understood that any simple alterations, modifications or other equivalent alterations as would be within the skill of the art without the exercise of inventive faculty, are within the scope of the invention.
Claims (4)
1. The utility model provides a hydraulic pressure starts formula packer deblocking tool which characterized in that: comprises a mandrel, an upper joint, a lower joint, an upper piston and a lower piston;
the upper end of the mandrel is connected with the upper joint through threads, an upper piston cavity is formed between the mandrel and the inner wall of the upper joint, a through hole is formed at the upper end of the mandrel, and an axial groove is formed at the threaded connection position of the upper joint;
the lower end of the mandrel is connected with the lower joint through threads, a lower piston cavity is formed between the mandrel and the inner wall of the lower joint, and a pressure transmission hole is formed in the position, corresponding to the lower piston cavity, of the mandrel;
the upper piston and the lower piston are sleeved on the outer wall of the mandrel, the upper end of the upper piston extends into the upper piston cavity, the lower end of the lower piston extends into the lower piston cavity, the upper piston is fixedly connected with the mandrel through a starting shearing pin, and the upper piston is fixedly connected with the lower piston through a releasing shearing pin;
the lower piston is provided with a deblocking device, the deblocking device comprises a set pin, spring pieces and deblocking blocks, the spring pieces are arranged on two sides of the deblocking blocks, and the spring pieces are fixedly arranged on the lower piston through the set pin;
an upper trapezoidal groove, a boss and a lower trapezoidal groove are formed in the outer wall of the mandrel, the upper trapezoidal groove and the lower trapezoidal groove are respectively located on the upper side and the lower side of the boss, and the deblocking block is located in the upper trapezoidal groove in a non-deblocking state;
a necking down is formed in the position, close to the upper end, inside the mandrel, and a mandrel positioning step is formed on the mandrel;
the plugging ball is thrown from the well mouth and is positioned on the necking of the mandrel, because the inner diameter of the necking is smaller than the diameter of the plugging ball, the plugging ball cannot pass through the necking, at the moment, the plugging ball blocks a downward channel of liquid from generating downward hydraulic pressure, the liquid enters an upper piston cavity through a through hole of the mandrel and an axial groove of an upper joint, the axial thrust of the liquid cuts off a starting shearing pin, an upper piston descends, an upper piston positioning step on the upper piston is attached to a mandrel positioning step on the mandrel, so that the upper piston is axially positioned, at the moment, a gap is generated between the upper piston and the upper joint, the liquid in the pipe enters an outer annular space through a through hole of the mandrel and a gap generated between the upper piston and the upper joint, a fluid channel is opened, in the descending process of the upper piston, the lower piston is pushed to descend, the lower piston pushes a deblocking block to move to a boss of the mandrel, the deblocking block is opened, and a tool is lifted, the deblocking block deblocks the packer.
2. The hydraulically activated packer unsetting tool of claim 1, wherein: the through holes are uniformly distributed along the circumference of the mandrel, the number of the through holes is 4, and the through holes are mutually 90 degrees; the axial grooves are uniformly distributed along the inner wall of the upper joint, the number of the axial grooves is 4, and the axial grooves are 90 degrees.
3. The hydraulically activated packer unsetting tool of claim 1, wherein: the number of the unsealing devices is 4, the unsealing devices are uniformly distributed around the circumference of the lower piston and form an angle of 90 degrees with each other.
4. The hydraulically activated packer unsetting tool of claim 1, wherein: the deblocking piece includes base and arch, and the base is circular-arcly, is provided with 2 archs on it, and the deblocking piece is located 2 bellied middles with the tie point of spring leaf, and the spring leaf is inwards buckled, makes the deblocking piece be in radial contraction state under the non-deblocking state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010296045.3A CN111502575B (en) | 2020-04-15 | 2020-04-15 | Hydraulic pressure starts formula packer deblocking instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010296045.3A CN111502575B (en) | 2020-04-15 | 2020-04-15 | Hydraulic pressure starts formula packer deblocking instrument |
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| Publication Number | Publication Date |
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| CN111502575A CN111502575A (en) | 2020-08-07 |
| CN111502575B true CN111502575B (en) | 2022-07-22 |
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| CN202010296045.3A Active CN111502575B (en) | 2020-04-15 | 2020-04-15 | Hydraulic pressure starts formula packer deblocking instrument |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5884699A (en) * | 1996-02-26 | 1999-03-23 | Halliburton Energy Services, Inc. | Retrievable torque-through packer having high strength and reduced cross-sectional area |
| CN202596627U (en) * | 2011-12-01 | 2012-12-12 | 阜新市石油工具厂 | High-temperature drilling liner hanger bidirectional setting mechanism |
| CN202866705U (en) * | 2012-11-16 | 2013-04-10 | 中国石油集团渤海钻探工程有限公司 | Rotary setting release tool capable of being used by both hanger and packer |
| CN204804727U (en) * | 2015-05-19 | 2015-11-25 | 中国石油天然气股份有限公司 | Hanger, deblocking lift device and send into seat encapsulation and put |
| CN206000503U (en) * | 2016-09-18 | 2017-03-08 | 中国海洋石油总公司 | The retracting device of packer |
| CN110566154A (en) * | 2019-10-15 | 2019-12-13 | 荆州市赛瑞能源技术有限公司 | Ultra-short type removable hydraulic packer |
-
2020
- 2020-04-15 CN CN202010296045.3A patent/CN111502575B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5884699A (en) * | 1996-02-26 | 1999-03-23 | Halliburton Energy Services, Inc. | Retrievable torque-through packer having high strength and reduced cross-sectional area |
| CN202596627U (en) * | 2011-12-01 | 2012-12-12 | 阜新市石油工具厂 | High-temperature drilling liner hanger bidirectional setting mechanism |
| CN202866705U (en) * | 2012-11-16 | 2013-04-10 | 中国石油集团渤海钻探工程有限公司 | Rotary setting release tool capable of being used by both hanger and packer |
| CN204804727U (en) * | 2015-05-19 | 2015-11-25 | 中国石油天然气股份有限公司 | Hanger, deblocking lift device and send into seat encapsulation and put |
| CN206000503U (en) * | 2016-09-18 | 2017-03-08 | 中国海洋石油总公司 | The retracting device of packer |
| CN110566154A (en) * | 2019-10-15 | 2019-12-13 | 荆州市赛瑞能源技术有限公司 | Ultra-short type removable hydraulic packer |
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| CN111502575A (en) | 2020-08-07 |
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