CN209942787U - Short and small full-soluble bridge plug suitable for different environments - Google Patents
Short and small full-soluble bridge plug suitable for different environments Download PDFInfo
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- CN209942787U CN209942787U CN201920203173.1U CN201920203173U CN209942787U CN 209942787 U CN209942787 U CN 209942787U CN 201920203173 U CN201920203173 U CN 201920203173U CN 209942787 U CN209942787 U CN 209942787U
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Abstract
The utility model discloses a short and small full soluble bridge plug suitable for different environment, which comprises a body (101), slips (102) and a track (103), wherein the slips (102) and the track (103) are sleeved on the body, and the bridge plug comprises a baffle (104), a sealing barrel (105) and a locking mechanism (106); the baffle (104) and the sealing barrel (105) are positioned on the body (101), the baffle (104) is positioned at the leftmost end of the body (101), and one end of the baffle (104) is connected with the sealing barrel (105); the sealing barrel (105) is connected with the track (103); the track (103) is connected with slips (102); the locking mechanism (106) is used for fixing the right end of the body (101) through screw threads. Has the advantages of simple and light structure, short length, high well descending speed, layered dissolution, production cost and transportation cost saving, etc. The fracturing plugging agent is mainly used for horizontal staged fracturing plugging production increase of oil and gas wells.
Description
Technical Field
The invention discloses a clean water soluble bridge plug which can be dissolved in severe environment underground and low-temperature and low-mineralization degree environment without any chemical dissolving liquid.
Background
In the aspects of oil and gas development at home and abroad, products such as composite bridge plugs, large-drift-diameter bridge plugs and the like are the current core tools. The composite bridge plug is a common technology in the field of unconventional oil gas, but the composite bridge plug needs to be removed by using a coiled tubing drill mill in the later stage of fracturing operation to recover the drift diameter of a shaft; drilling and grinding need to use tools such as coiled tubing trucks, coiled tubing downhole tools, mill shoes and the like, the operation cost is high, and the risk of operation on small boreholes and over deep wells is large.
The large-drift-diameter bridge plug can be directly put into production after fracturing without drilling and grinding; but the drift diameter of the sleeve is smaller than the inner diameter of the sleeve, so that the risk of secondary transformation operation in the later period is high and the difficulty is high; and if the removal is needed, sleeve milling and salvaging or direct drilling and grinding are needed, so that the operation cost is high and the period is long.
The composite bridge plug and the large-drift-diameter bridge plug have the characteristics of being long and clumsy, not changing when being put into a well, high in transportation cost and the like.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the short fully-soluble bridge plug suitable for different environments is specially disclosed, and is characterized by comprising a body (101), slips (102) and a track (103), wherein the slips (102) and the track (103) are sleeved on the body, and the bridge plug comprises a baffle plate (104), a sealing barrel (105) and a locking mechanism; the baffle (104) and the sealing barrel (105) are positioned on the body (101), the baffle (104) is positioned at the leftmost end of the body (101), and one end of the baffle (104) is connected with the sealing barrel (105); the sealing barrel (105) is connected with the track (103); the track (103) is connected with slips (102); the right end of the body (101) is fixed by the locking mechanism through screw threads.
The inner side of the body (101) contains a coating for relieving the dissolution rate, which prevents small particles of the bridge plug dissolution product in the horizontal section from blocking the channel, ensures complete dissolution, and then starts to slowly dissolve.
The left part of one end of the connecting baffle plate (104) at least comprises more than one screw hole (106), and the depth of the screw hole (106) accounts for 1/2 of the thickness of the body (101); the screw hole (106) is used for connecting an external setting and radially penetrating through the bridge plug.
The slips (102) comprise at least more than 2 pieces of cards (201), friction beans (202), clamping rings (203) and clamping grooves (301), wherein the cards (201) are in a 4 shape, the clamping grooves (301) are arranged at two ends of the outer surface of the cards (201), the depth of each clamping groove is 1-5mm, the friction beans (202) are regularly embedded on the surface of the cards (201), the width of the end a (302) is 2-5 times that of the end b, the clamping rings (203) connect the cards (201) together to form the slips (102), the outer diameter of the slips (102) is circular, the inner diameter of the c end (501) of each slip is larger than that of the d end (502) and smaller than that of the slips (102), the cards (201) are independent from each other before and are connected through the clamping rings (203), gaps (204) between the cards (201) larger than the edge of a track exist between the cards (201), and the slips (102) are also suitable for being sleeved with an integral rubber sleeve instead of the outer surface of the slips (102) Instead of the collar (203), the cards (201) are fixed together.
The outer surface of the track (103) is 1-30. The slope ends at the length of the track 2/3, and the amount of the slope depends on the amount of the card.
The inner diameter of the track (103) is circular, and the e end (601) of the outer diameter is smaller than the f end (602) and larger than the inner diameter (603); the c end (501) of the slip (102) is connected with the e end (601) of the track (103), and during operation, the c end (501) of the slip (102) is pushed by pressure to rapidly travel along the e end (601) of the track; one end of the track (103) is an inward concave circular ring.
The inner diameter wall of the sealing barrel (105) is concave; two ends of the sealing barrel (105) are in outward convex circular rings (801); the outward convex circular ring (801) of the sealing barrel (105) is buckled with the inward concave circular ring at one end of the track (103).
The material for the sealing barrel (105) comprises a rubber material, a metal bar material and an engineering composite material; the colloid material is rubber, and is a pressure-resistant easily-soluble material; the metal bar material: stainless steel, magnesium alloys, alloy steels, non-ferrous metals and alloys; the engineering composite material is as follows: carbon fiber or glass fiber reinforced polyetheretherketone.
The clean water soluble bridge plug can be dissolved in the sealed barrel (105) under the low-temperature and low-mineralization environment, the sealed barrel (105) is selected according to the temperature and pressure in a well to ensure the high and stable yield of the oil field, the sealed barrel (105) can be divided into a low-temperature well cement barrel, a medium-temperature well cement barrel and a high-temperature well cement barrel, the low-temperature well cement barrel is-20 ~ 50 degrees, the medium-temperature well cement barrel is 50 ~ 80 degrees, and the high-temperature well cement barrel is 80 ~ 150 degrees.
A metal ring and a rubber ring can be optionally added between the sealing barrel (105) and the track (103) to serve as secondary protection.
The invention has the beneficial effects that: 1. The structure is simple, the whole body is short and small, and the well descending speed is improved; 2. selecting different sealing barrels to control the dissolving time according to the underground environment; 3. the production and the transportation of finished products are saved; 4. the fracturing and the gradual degradation are started, and meanwhile, the production can be immediately carried out; 5. selecting different sealing barrels according to the environmental conditions; 6. the bridge plug is completely soluble in clear water and has no pollution; 7. the secondary mining operation can be carried out at any time.
Drawings
FIG. 1 is a schematic view of a bridge plug according to the present invention
FIG. 2 is a slip of the bridge plug of the present invention
FIG. 3 is a card in the slips of the bridge plug of the present invention
FIG. 4 shows a collar in the slip of the bridge plug of the present invention
FIG. 5 is a schematic cross-sectional view of a slip of the bridge plug of the present invention
FIG. 6 is a track elevation of the bridge plug of the present invention
FIG. 7 is a perspective view of the track of the bridge plug of the present invention
Fig. 8 is a perspective view of a sealing barrel of the bridge plug of the present invention.
Detailed Description
Embodiment mode 1
The short fully soluble bridge plug suitable for different environments is characterized by comprising a body (101), slips (102) and a track (103), wherein the slips (102) and the track (103) are sleeved on the body, and the bridge plug comprises a baffle plate (104), a sealing barrel (105) and a locking mechanism; the baffle (104) and the sealing barrel (105) are positioned on the body (101), the baffle (104) is positioned at the leftmost end of the body (101), and one end of the baffle (104) is connected with the sealing barrel (105); the sealing barrel (105) is connected with the track (103); the track (103) is connected with slips (102); the right end of the body (101) is fixed by the locking mechanism through screw threads.
Further the inner side of the body (101) contains a coating for relieving the dissolution speed, which prevents small particles of bridge plug dissolution products in the horizontal section from blocking the channel, ensures that after all dissolution, the slow dissolution is started.
The left part of one end of the connecting baffle plate (104) is at least provided with more than one screw hole (106), and the depth of the screw hole (106) accounts for 1/2 of the thickness of the body (101); the screw hole (106) is used for connecting an external setting and radially penetrating through the bridge plug.
The slips (102) further comprise cards (201), friction beans (202), collars (203) and clamping grooves (301), wherein the cards (201) are more than 2, the cards (201) are in a 4 shape, the clamping grooves (301) are arranged at two ends of the outer surface of the cards (201), the depth of the clamping grooves is 1-5mm, the friction beans (202) are regularly embedded in the surface of the cards (201), the width of an end a (302) is 2-5 times that of an end b, the collars (203) connect the cards (201) together to form the slips (102), the outer diameter of the slips (102) is circular, the inner diameter of a c end (501) of each slip is larger than that of a d end (502) and smaller than that of the slips (102), after the cards (201) are mutually independent before and are connected through the collars (203), gaps (204) between the cards (201) are larger than the edge of a track exist between the cards (201), and the slips (102) are also suitable for being sleeved on the outer surface of the whole slips (102) The rubber sleeve replaces the collar (203) to fix the cards (201) together.
Furthermore, the outer surface of the track (103) is 1-30. The slope ends at the length of the track 2/3, and the amount of the slope depends on the amount of the card.
Further, the inner diameter of the track (103) is circular, and the e end (601) of the outer diameter is smaller than the f end (602) and larger than the inner diameter (603); the c end (501) of the slip (102) is connected with the e end (601) of the track (103), and during operation, the c end (501) of the slip (102) is pushed by pressure to rapidly travel along the e end (601) of the track; one end of the track (103) is an inward concave circular ring.
Further, the inner diameter wall of the sealing barrel (105) is concave; two ends of the sealing barrel (105) are in outward convex circular rings (801); the outward convex circular ring (801) of the sealing barrel (105) is buckled with the inward concave circular ring at one end of the track (103).
Further, the material for the sealing barrel (105) comprises a rubber material, a metal bar material and an engineering composite material; the colloid material is rubber, and is a pressure-resistant easily-soluble material; the metal bar material: stainless steel, magnesium alloys, alloy steels, non-ferrous metals and alloys; the engineering composite material is as follows: carbon fiber or glass fiber reinforced polyetheretherketone.
Furthermore, the sealing barrel (105) can be a clear water soluble bridge plug which can be dissolved in low-temperature and low-mineralization environments, the rubber barrel is selected according to the temperature and pressure in a well, high yield and stable yield of an oil field are guaranteed, the sealing barrel (105) can be divided into a low-temperature well rubber barrel, a medium-temperature well rubber barrel and a high-temperature well rubber barrel, the low-temperature well rubber barrel is-20 ~ 50 ℃, the medium-temperature well rubber barrel is 50 ~ 80 ℃, and the high-temperature well rubber barrel is 80 ~ 150 ℃.
Furthermore, a metal ring and a rubber ring can be optionally added between the sealing barrel (105) and the track (103) to be used as secondary protection.
Embodiment mode 2
The first step is as follows: the central tube, the baffle, the slips, the track, the sealing barrel and the locking mechanism are taken out, the baffle, the slips, the track, the sealing barrel and the locking mechanism are sequentially assembled together, and the invention has the advantages of simple and short structure, convenient assembly and great labor time saving after the assembly is finished.
The second step is that: when the operation is started, the underground temperature and the pressure are indispensable measurement parameters, the accurate underground temperature and pressure measurement has important effects on oil well monitoring and the like, and different temperature-resistant and pressure-resistant sealing barrels are selected according to measurement monitoring.
The third step: one end of the bridge plug is connected with the setting tool and the measuring instrument, the setting tool is accurately set according to the numerical value of the measuring instrument, and loss caused by setting in advance is avoided.
The fourth step: the bridge plug is conveyed along an oil-gas shaft and placed to a preset position, then fracturing balls (which are fully soluble) are put in for plugging and extrusion blasting, and a setting tool returns to the well surface.
The fifth step: the steps are repeated again, the invention starts to melt within the time set before the operation, the invention starts to melt from the surface contacting with the liquid, has no impurities, no pollution and no need of reverse discharge, and can implement the mining operation in the melting process.
Embodiment 3
The test device comprises: the annulus gap between the sleeve and the extrusion ring was 0.043 inches; the experimental temperature is as follows: 80-90 ℃; maximum pressure: 10,000 PSI; the extrusion ring is a soluble metal. The sealed barrel test starts from 500PSI at 80 ℃, one step at 10MPa, each step bears pressure for 5 minutes, then increases by 1500PSI and stabilizes the pressure for 2 hours at 11,000 PSI; the temperature is raised to 90 ℃, the state of the rubber cylinder is stable, and the pressure is maintained above 10,132 PSI for 13 hours. Therefore, before the soluble rubber cylinder is completely dissolved, the sealing performance and the fracturing construction can be ensured to be smoothly carried out; more preferably, the sealing barrel can select different rubber cylinders according to different well environments.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the advantageous effects of the invention can be achieved in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A short and small fully-soluble bridge plug suitable for different environments is characterized by comprising a body (101), slips (102) and a track (103), wherein the slips (102) and the track (103) are sleeved on the body, and the bridge plug comprises a baffle plate (104), a sealing barrel (105) and a locking mechanism; the baffle (104) and the sealing barrel (105) are positioned on the body (101), the baffle (104) is positioned at the leftmost end of the body (101), and one end of the baffle (104) is connected with the sealing barrel (105); the sealing barrel (105) is connected with the track (103); the track (103) is connected with slips (102); the right end of the body (101) is fixed by the locking mechanism through screw threads.
2. A short fully soluble bridge plug suitable for use in different environments according to claim 1, wherein the inside of the body (101) contains a coating to slow the dissolution rate, preventing small particles of bridge plug dissolution products from blocking the channel in the horizontal section, ensuring complete dissolution and then starting to slowly dissolve.
3. A short fully soluble bridge plug suitable for different environments according to claim 1, wherein the connecting baffle (104) has at least one screw hole (106) on the left part of one end, and the depth of the screw hole (106) is 1/2 of the thickness of the body (101); the screw hole (106) is used for connecting an external setting and radially penetrating through the bridge plug.
4. A short fully soluble bridge plug suitable for use in different environments according to claim 1, wherein the slips (102) comprise a card (201), a friction bean (202), a collar (203), a slot (301); the number of the cards (201) is at least more than 2, the cards (201) are in a 4 shape, and the clamping grooves (301) are arranged at two ends of the outer surface of each card (201); the depth is 1-5 mm; the friction beans (202) are regularly embedded on the surface of the card (201); the width of the end a (302) is 2-5 times of that of the end b; the collar (203) connecting the cards (201) together to form slips (102); the outer diameter of the slip (102) is circular, and the inner diameter of the c end (501) of the slip is larger than that of the d end (502) and smaller than that of the slip (102); the cards (201) are mutually independent before and are connected through a clamping ring (203), and gaps (204) between the cards (201) are larger than the edges of the tracks; the slips (102) are also adapted to be fitted over their outer surfaces with an integral rubber sleeve instead of the collar (203) to hold the slips (201) together.
5. A short fully soluble bridge plug for use in diverse environments according to claim 1, wherein the rail (103) has an outer surface of 1-30; the slope ends at the length of the track 2/3, and the amount of the slope depends on the amount of the card.
6. A short fully soluble bridge plug suitable for use in different environments according to claim 1, wherein the inside diameter of the track (103) is circular, and the e-end (601) of the outside diameter is smaller than the f-end (602) and larger than the inside diameter (603); the c end (501) of the slip (102) is connected with the e end (601) of the track (103), and during operation, the c end (501) of the slip (102) is pushed by pressure to rapidly travel along the e end (601) of the track; one end of the track (103) is an inward concave circular ring.
7. A short fully soluble bridge plug for use in different environments according to claim 1, wherein the inner diameter wall of the sealing barrel (105) is concave; two ends of the sealing barrel (105) are in outward convex circular rings (801); the outward convex circular ring (801) of the sealing barrel (105) is buckled with the inward concave circular ring at one end of the track (103).
8. A short fully soluble bridge plug for different environments according to claim 1, wherein the material for the sealing barrel (105) comprises a colloidal material, a metal bar, an engineering composite material; the colloid material is rubber, and is a pressure-resistant easily-soluble material; the metal bar material: stainless steel, magnesium alloys, alloy steels, non-ferrous metals and alloys; the engineering composite material is as follows: carbon fiber or glass fiber reinforced polyetheretherketone.
9. The short and small fully soluble bridge plug suitable for different environments is characterized in that the sealing barrel (105) can be a clear water soluble bridge plug which can be dissolved in low-temperature and low-mineralization-degree environments, the sealing barrel (105) is selected according to the temperature and the pressure in a well to ensure high and stable production of an oil field, and the sealing barrel (105) can be divided into a low-temperature well cement barrel, a medium-temperature well cement barrel and a high-temperature well cement barrel, wherein the low-temperature well cement barrel is-20 ~ 50 ℃, the medium-temperature well cement barrel is 50 ~ 80 ℃, and the high-temperature well cement barrel is 80 ~ 150 ℃.
10. A short fully soluble bridge plug suitable for use in different environments according to claim 1, wherein a metal ring or rubber ring is optionally added between the sealing barrel (105) and the rail (103) for secondary protection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920203173.1U CN209942787U (en) | 2019-02-16 | 2019-02-16 | Short and small full-soluble bridge plug suitable for different environments |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920203173.1U CN209942787U (en) | 2019-02-16 | 2019-02-16 | Short and small full-soluble bridge plug suitable for different environments |
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| CN209942787U true CN209942787U (en) | 2020-01-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826592A (en) * | 2019-02-16 | 2019-05-31 | 陕西海格瑞恩实业有限公司 | A kind of short and small complete solvable bridge plug suitable for varying environment |
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2019
- 2019-02-16 CN CN201920203173.1U patent/CN209942787U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826592A (en) * | 2019-02-16 | 2019-05-31 | 陕西海格瑞恩实业有限公司 | A kind of short and small complete solvable bridge plug suitable for varying environment |
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