CN108868675B - Bridge plug hydraulic setting tool and bridge plug setting method - Google Patents
Bridge plug hydraulic setting tool and bridge plug setting method Download PDFInfo
- Publication number
- CN108868675B CN108868675B CN201810566798.4A CN201810566798A CN108868675B CN 108868675 B CN108868675 B CN 108868675B CN 201810566798 A CN201810566798 A CN 201810566798A CN 108868675 B CN108868675 B CN 108868675B
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- center rod
- connecting sleeve
- bridge plug
- sealing cavity
- cavity
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 63
- 238000010008 shearing Methods 0.000 claims abstract description 34
- 239000002243 precursor Substances 0.000 claims abstract description 28
- 150000001875 compounds Chemical group 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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
- E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
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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 bridge plug hydraulic setting tool which comprises an upper joint, a shearing pin a, a precursor driving device, a lower center rod, a push cylinder connecting sleeve, a sealing plug, a push ring, a compound ring, a shearing pin b, a ball seat and a conversion joint, wherein the upper joint is connected with the precursor driving device through the shearing pin a, the push cylinder connecting sleeve and the lower center rod are sleeved on the precursor driving device in an up-down fit manner, a containing sealing cavity for containing liquid is enclosed between the precursor driving device, the lower center rod and the push cylinder connecting sleeve, the push ring and the push cylinder connecting sleeve can move backwards, an annular sealing cavity is formed between the precursor driving device and the lower center rod after movement, the compound ring is connected with the lower center rod through the shearing pin b, the sealing plug is arranged on the precursor driving device, the conversion joint is connected with the lower center rod, the ball seat is arranged in the inner cavity of the conversion joint, the tool length is shorter, and the bridge plug hydraulic setting tool is used, connected, maintained, maintenance is more convenient, cost is lower, can be repeatedly used, and is more efficient. The invention also discloses a bridge plug setting method.
Description
Technical Field
The invention relates to an underground tool of an oil-gas field, in particular to a hydraulic setting tool of a bridge plug and a setting method of the bridge plug.
Background
The fracturing reservoir reconstruction technology is widely applied to unconventional oil and gas reservoir exploitation, bridge plug staged fracturing operation has become a general fracturing mode in industry, and bridge plug setting is performed through a hydraulic setting tool, so that the bridge plug setting is the most common bridge plug setting mode, but the length of the current hydraulic setting tool is longer, the connection, transportation and maintenance on site are very troublesome, and the longer length also increases more uncontrollable factors for underground operation.
Therefore, a bridge plug setting tool with short length, convenient field connection, transportation and maintenance and higher efficiency is needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a bridge plug hydraulic setting tool and a bridge plug setting method.
The aim of the invention is achieved by the following technical measures: the bridge plug hydraulic setting tool comprises an upper joint, a shearing pin a, a precursor device, a lower center rod, a pushing cylinder connecting sleeve, a sealing plug, a pushing ring, a compound ring, a shearing pin b, a ball seat and a conversion joint, wherein the upper joint is connected with the precursor device through the shearing pin a, the pushing cylinder connecting sleeve and the lower center rod are vertically attached and sleeved on the precursor device, a containing sealing cavity for containing liquid is enclosed between the precursor device, the lower center rod and the pushing cylinder connecting sleeve, the pushing ring and the pushing cylinder connecting sleeve arranged at the front end of the pushing cylinder connecting sleeve can move backwards, when the precursor device compresses the containing sealing cavity, the liquid pushes the pushing ring and the pushing cylinder connecting sleeve to move backwards, an annular sealing cavity for containing liquid is formed between the precursor device and the lower center rod, the compound ring arranged in the annular cavity between the pushing cylinder connecting sleeve and the lower center rod is connected with the lower center rod through the shearing pin b, the sealing plug for opening and closing the containing sealing cavity is arranged on the precursor device, the sealing plug is convenient for replacing the containing liquid, the sealing plug can be checked in time, and the conversion joint is connected with the lower center rod.
Further, the precursor device comprises a center rod, a shearing sleeve, an intermediate connecting sleeve and a lower end connecting sleeve, wherein the center rod is the same three, namely a center rod a, a center rod b and a center rod c, the three center rods are connected end to end, the shearing sleeve, the intermediate connecting sleeve and the lower end connecting sleeve are sequentially connected end to end and then sleeved on the center rod, the shearing sleeve corresponds to the position of the center rod a, the intermediate connecting sleeve corresponds to the position of the center rod b, a protrusion is arranged on the lower surface of the lower end connecting sleeve, the front end part of the protrusion of the lower end connecting sleeve corresponds to the position of the center rod c, and the rear end part of the protrusion of the lower end connecting sleeve corresponds to the position of the lower center rod.
Further, sealing cavities are arranged between the shearing sleeve and the central rod a, between the middle connecting sleeve and the central rod b and between the lower connecting sleeve and the central rod c, and through holes for communicating the sealing cavities with the inner cavity of the tool are formed in the central rod a, the central rod b and the central rod c.
Further, the front end of the lower center rod is provided with a boss, the boss divides the annular sealing cavity into an annular sealing cavity a and an annular sealing cavity b, the annular sealing cavity a and the annular sealing cavity b are communicated, and the sectional area of the accommodating sealing cavity is larger than that of the annular sealing cavity a.
Further, the sectional area of the accommodating seal cavity is more than 2 times of the sectional area of the annular seal cavity a.
Further, the cross-sectional area of the accommodating seal cavity is the same as the cross-sectional area of the annular seal cavity b.
Further, the compound ring can be compounded with the push ring and move rearward with the push ring in the annular seal cavity.
Further, the front end of the adapter extends into the annular cavity between the push tube connecting sleeve and the lower center rod, and the adapter can block rightward movement of the composite ring.
Further, a method of setting a bridge plug includes the steps of:
1) The bridge plug hydraulic setting tool is connected with the bridge plug through a pushing cylinder and an adapter;
2) Connecting the connected tool string at the tail end of the tool string to be put into a preset position;
3) Throwing a ball, pumping the ball to hold pressure, pushing the outer sleeve part of the bridge plug hydraulic setting tool to move forwards by pushing the pushing cylinder, compressing the rubber cylinder of the bridge plug to expand, and engaging the slips;
4) After the pushing ring and the compound ring of the bridge plug hydraulic setting tool are compounded, the pushing force of the bridge plug hydraulic setting tool reaches the maximum, so that releasing and bridge plug setting are realized.
Compared with the prior art, the invention has the beneficial effects that:
1. compared with the prior art, the hydraulic setting tool for the bridge plug with the novel structure is provided, (the incompressible principle of liquid volume is utilized), and the purpose of setting the bridge plug can be achieved more efficiently.
2. Compared with the existing hydraulic setting tool, the hydraulic setting tool for the bridge plug is shorter in length, and is more convenient to connect, transport and maintain on site.
3. The hydraulic setting tool for the bridge plug is high in reusability, and can be used continuously after the shear pin is replaced by pushing the movable outer sleeve part back to the original position after the hydraulic setting tool is used.
The invention is described in detail below with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional view of a seal plug installation.
Fig. 3 is a schematic view of the structure of the invention in connection with a bridge plug.
Wherein, the upper joint is 1, the center rod is 2, the shearing sleeve is 3, the middle connecting sleeve is 4, the lower connecting sleeve is 5, the lower center rod is 6, the pushing cylinder connecting sleeve is 7, the ball seat is 8, 9, adapter, 10, shear pins a,12, sealing plugs, 13, pushing rings, 14, composite ring 15, shear pin b,16, adapter, 17, push tube, 18, bridge plug.
Description of the embodiments
In the embodiment, as shown in fig. 1 to 3, the bridge plug hydraulic setting tool comprises an upper joint 1, a precursor device, a lower center rod 6, a push cylinder connecting sleeve 7, a ball seat 8, an adapter 9, a shearing pin a10, a sealing plug 12, a push ring 13, a compound ring 14 and a shearing pin b15, wherein the upper joint 1 is connected with the precursor device through the shearing pin a10, the push cylinder connecting sleeve 7 and the lower center rod 6 are sleeved on the precursor device in an up-down attaching way, a containing sealing cavity for containing liquid is enclosed between the precursor device, the lower center rod 6 and the push cylinder connecting sleeve 7, the liquid is incompressible fluid, a push ring 13 and the push cylinder connecting sleeve 7 arranged at the front end of the push cylinder connecting sleeve 7 can move backwards, when the precursor device compresses the containing sealing cavity, the push ring 13 and the push cylinder 7 move backwards, the compound ring 14 used for containing the liquid is formed between the precursor device and the lower center rod 6, the compound ring 14 arranged in the annular cavity between the push cylinder 7 and the lower center rod 6 is connected with the lower center rod 6 through the shearing pin b15 and the lower center rod 6 for opening the adapter 6 and closing the adapter 9, and the push cylinder connecting sleeve 7 is arranged in the adapter 9 and the adapter 9 is connected with the adapter 9.
The front driving device comprises a center rod 2, a shearing sleeve 3, an intermediate connecting sleeve 4 and a lower end connecting sleeve 5, wherein the center rod 2 is provided with the same three center rods, namely a center rod a, a center rod b and a center rod c, the three center rods 2 are connected end to end, the shearing sleeve 3, the intermediate connecting sleeve 4 and the lower end connecting sleeve 5 are sequentially connected end to end and then sleeved on the center rod 2, the shearing sleeve 3 corresponds to the center rod a in position, the intermediate connecting sleeve 4 corresponds to the center rod b in position, the lower surface of the lower end connecting sleeve 5 is provided with a bulge, the front end part of the bulge of the lower end connecting sleeve 5 corresponds to the center rod c in position, and the rear end part of the bulge of the lower end connecting sleeve 5 corresponds to the lower center rod 6 in position.
Sealing cavities are arranged between the shearing sleeve 3 and the central rod a, between the middle connecting sleeve 4 and the central rod b and between the lower end connecting sleeve 5 and the central rod c, through holes for communicating the sealing cavities with the inner cavity of the tool are formed in the central rod a, the central rod b and the central rod c, and by adopting the 3 sealing cavity structures, the thrust provided by the precursor device is greatly increased when the ball is thrown and pressed.
The front end of the lower center rod 6 is provided with a boss which divides the annular sealing cavity into an annular sealing cavity a and an annular sealing cavity b, the annular sealing cavity a and the annular sealing cavity b are communicated, and the sectional area of the accommodating sealing cavity is larger than that of the annular sealing cavity a.
The sectional area of the accommodating sealing cavity is more than 2 times of the sectional area of the annular sealing cavity a.
The sectional area of the accommodating sealing cavity is the same as the sectional area of the annular sealing cavity b.
In the invention, the whole flow channel for accommodating liquid is formed by the communication hook of the accommodating sealing cavity and the annular sealing cavity, the sectional areas of the front section and the rear section of the channel are the same, the sectional area of the middle section is small, and the flow channel structure with different diameters provides effective guarantee for realizing releasing and bridge plug setting.
The compound ring 14 can be compounded with the push ring 13 and move back with the push ring 13 in the annular seal cavity.
The front end of the adapter 9 extends into the annular cavity between the push sleeve connection sleeve 7 and the lower central rod 6, the adapter 9 being able to block the rightward movement of the compound ring 14.
A method of setting a bridge plug comprising the steps of:
1) Connecting the bridge plug hydraulic setting tool with the bridge plug 18 through the push cylinder 17 and the adapter 16;
2) Connecting the connected tool string at the tail end of the tool string to be put into a preset position;
3) The ball is thrown, the pumping ball is pressed, the outer sleeve part of the bridge plug hydraulic setting tool pushes the pushing cylinder 17 to move forwards, the rubber cylinder of the compression bridge plug expands, and the slips are engaged;
4) After the pushing ring 13 and the compound ring 14 of the bridge plug hydraulic setting tool are compounded, the pushing force of the bridge plug hydraulic setting tool reaches the maximum, releasing is realized, and the bridge plug 18 is set.
In use of the invention, the bridge plug hydraulic setting tool is connected to the bridge plug 18 via the push sleeve 17 and the adapter 16 (the push sleeve and adapter are separately adapted for each bridge plug type). And connecting the well connected bridge plug hydraulic setting tool at the tail end of the running tool string. When the string is run into the predetermined position, a ball is thrown into the string, and pumped to the position of the ball seat 8, and the ball seat 8 are sealed. The pressure in the lifting pipe acts in the sealing cavity through the holes on the central rod 2, and when the pressure reaches a certain value, the shearing sleeve 3, the middle connecting sleeve 4 and the lower connecting sleeve 5 move backwards by hydraulic thrust, shear the shearing pin a10 and start the bridge plug setting process. In the process of moving the lower end connecting sleeve 5 backwards, the containing liquid is incompressible in volume, so that the containing liquid is pushed to flow backwards, and the pushing ring 13 is pushed to move backwards. After the pushing ring 13 slows down a certain pushing force, the pushing cylinder connecting sleeve 7 and the pushing cylinder 17 are pushed to move backwards, and then the compressed rubber cylinder is extruded and expanded, and the slips are lifted and split along the slope. Since the cross-sectional area of the annular sealing chamber left after the push ring 13 moves backward is much smaller than the cross-sectional area of the original containing sealing chamber containing the liquid, the distance of the backward movement of the push cylinder connecting sleeve 7 is several times that of the lower end connecting sleeve 5. When the pushing ring 13 moves to be compounded with the compound ring 14, the front and rear sectional areas of the space where the liquid is contained are consistent, the pushing force reaches the maximum, and when the maximum value which can be born by releasing the bridge plug 18 is exceeded, releasing is realized. The back bridge plug 18 is set, and the hydraulic setting tool of the bridge plug is pulled out of the wellhead along with the pipe column.
After the use is finished, the movable outer sleeve part (the shearing sleeve, the middle connecting sleeve, the lower end connecting sleeve and the pushing cylinder connecting sleeve) is pushed back to the original position, and the shearing pin can be continuously used after the shearing pin is replaced.
Reference herein to a "front" with directional indicators "forward" is a direction toward the upper joint; the "rear end" and "rearward" are in the opposite direction to the upper joint.
Claims (7)
1. The bridge plug hydraulic setting tool comprises an upper joint, a shearing pin a, a precursor device, a lower center rod, a push cylinder connecting sleeve, a sealing plug, a push ring, a compound ring, a shearing pin b, a ball seat and a conversion joint, wherein the upper joint is connected with the precursor device through the shearing pin a, the push cylinder connecting sleeve and the lower center rod are sleeved on the precursor device in an up-down fit manner, an accommodating sealing cavity for accommodating liquid is enclosed between the precursor device, the lower center rod and the push cylinder connecting sleeve, the push ring and the push cylinder connecting sleeve arranged at the front end of the push cylinder connecting sleeve can move backwards, when the precursor device compresses the accommodating sealing cavity, the liquid pushes the push ring and the push cylinder connecting sleeve to move backwards, an annular sealing cavity for accommodating liquid is formed between the precursor device and the lower center rod, the compound ring arranged in the annular cavity between the push cylinder connecting sleeve and the lower center rod is connected with the lower center rod through the shearing pin b, the sealing plug for opening and closing the accommodating sealing cavity is arranged on the precursor device, the conversion joint is connected with the lower center rod, and the ball seat is arranged in the conversion joint cavity; the front end of the lower center rod is provided with a boss, the boss divides the annular sealing cavity into an annular sealing cavity a and an annular sealing cavity b, the annular sealing cavity a and the annular sealing cavity b are communicated, and the sectional area of the accommodating sealing cavity is larger than that of the annular sealing cavity a; the compound ring can be compounded with the push ring and moves rearward in the annular seal cavity with the push ring.
2. The bridge plug hydraulic setting tool of claim 1, wherein: the front driving device comprises a center rod, a shearing sleeve, an intermediate connecting sleeve and a lower end connecting sleeve, wherein the center rod is the same three, namely a center rod a, a center rod b and a center rod c, the three center rods are connected end to end, the shearing sleeve, the intermediate connecting sleeve and the lower end connecting sleeve are sequentially connected end to end and then sleeved on the center rod, the shearing sleeve corresponds to the position of the center rod a, the intermediate connecting sleeve corresponds to the position of the center rod b, a bulge is arranged on the lower surface of the lower end connecting sleeve, the front end part of the bulge of the lower end connecting sleeve corresponds to the position of the center rod c, and the rear end part of the bulge of the lower end connecting sleeve corresponds to the position of the lower center rod.
3. The bridge plug hydraulic setting tool of claim 2, wherein: sealing cavities are arranged between the shearing sleeve and the central rod a, between the middle connecting sleeve and the central rod b and between the lower connecting sleeve and the central rod c, and through holes for communicating the sealing cavities with the inner cavity of the tool are formed in the central rod a, the central rod b and the central rod c.
4. The bridge plug hydraulic setting tool of claim 1, wherein: the sectional area of the accommodating sealing cavity is more than 2 times of the sectional area of the annular sealing cavity a.
5. The bridge plug hydraulic setting tool of claim 1, wherein: the sectional area of the accommodating sealing cavity is the same as the sectional area of the annular sealing cavity b.
6. The bridge plug hydraulic setting tool of claim 1, wherein: the front end of the adapter joint extends into the annular cavity between the push cylinder connecting sleeve and the lower center rod, and the adapter joint can block rightward movement of the composite ring.
7. A method of setting a bridge plug comprising the steps of:
1) Connecting the bridge plug hydraulic setting tool according to any one of claims 1-6 with the bridge plug via a push sleeve and an adapter;
2) Connecting the connected tool string to the tail end of the tool string to be put into a preset position;
3) Throwing a ball, pumping the ball to hold pressure, pushing the outer sleeve part of the bridge plug hydraulic setting tool to move forwards by pushing the pushing cylinder, compressing the rubber cylinder of the bridge plug to expand, and engaging the slips;
4) After the pushing ring and the compound ring of the bridge plug hydraulic setting tool are compounded, the pushing force of the bridge plug hydraulic setting tool reaches the maximum, so that releasing and bridge plug setting are realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810566798.4A CN108868675B (en) | 2018-06-05 | 2018-06-05 | Bridge plug hydraulic setting tool and bridge plug setting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810566798.4A CN108868675B (en) | 2018-06-05 | 2018-06-05 | Bridge plug hydraulic setting tool and bridge plug setting method |
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| Publication Number | Publication Date |
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| CN108868675A CN108868675A (en) | 2018-11-23 |
| CN108868675B true CN108868675B (en) | 2024-03-19 |
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