CN111706306B - Three-pipe concentric layered water injection pipe column - Google Patents
Three-pipe concentric layered water injection pipe column Download PDFInfo
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- CN111706306B CN111706306B CN202010707513.1A CN202010707513A CN111706306B CN 111706306 B CN111706306 B CN 111706306B CN 202010707513 A CN202010707513 A CN 202010707513A CN 111706306 B CN111706306 B CN 111706306B
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- bridge plug
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- sealing
- oil pipe
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000002347 injection Methods 0.000 title claims abstract description 44
- 239000007924 injection Substances 0.000 title claims abstract description 44
- 239000010410 layer Substances 0.000 claims abstract description 264
- 238000007789 sealing Methods 0.000 claims abstract description 182
- 238000003780 insertion Methods 0.000 claims abstract description 81
- 230000037431 insertion Effects 0.000 claims abstract description 81
- 239000011229 interlayer Substances 0.000 claims abstract description 58
- 239000002184 metal Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 abstract description 13
- 235000019198 oils Nutrition 0.000 description 111
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 235000019476 oil-water mixture Nutrition 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 230000002572 peristaltic effect Effects 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- 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
- E21B33/12—Packers; 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 three-pipe concentric layered water injection pipe column, which comprises an outer layer oil pipe, an upper layer bridge plug, a lower layer bridge plug and an upper layer sealing insertion pipe, wherein an interlayer oil pipe coaxial with the upper layer sealing insertion pipe is arranged in the upper layer sealing insertion pipe, the lower layer sealing insertion pipe connected with the interlayer oil pipe is inserted in the lower layer bridge plug, a soluble metal plug for temporarily sealing an annular space between the upper layer sealing insertion pipe and the interlayer oil pipe is arranged at the lower end of the upper layer sealing insertion pipe, the lower end of the lower layer sealing insertion pipe is provided with a temporary plug, a lower layer bridge plug sealing tool for sealing the lower layer bridge plug by pressing the interlayer oil pipe is sleeved outside the lower layer sealing insertion pipe below the lower layer bridge plug, and the outer layer oil pipe above the upper layer bridge plug is connected with the upper layer bridge plug sealing tool for sealing the upper layer bridge plug by pressing the annular space between the outer layer oil pipe and the interlayer oil pipe. When the three-pipe concentric layered water injection pipe column is constructed, the pipe column construction can be completed only by two pipe columns, and the three-pipe concentric layered water injection pipe column has the advantages of high construction speed, low cost, high reliability and the like.
Description
Technical Field
The invention relates to an oilfield water injection string, in particular to a three-pipe concentric layered water injection string.
Background
In the oil field exploitation process, the water injection pipe column is required to be adopted to carry out water injection and oil displacement on an oil layer, the separated layer water injection pipe column is usually respectively provided with an eccentric water injection pipe column and a multi-pipe concentric water injection pipe column, each layer section of the multi-pipe concentric water injection pipe column is provided with an independent water injection channel, a water distribution device is not required to be arranged underground, quantitative water distribution is achieved through ground operation, and water distribution quantity control is more accurate and adjustment is more convenient. In addition, the multi-pipe concentric separate layer water injection process pipe column has the advantages of simple structure, reliable operation, convenient operation, easy maintenance and the like. When the concentric layered water injection pipe column of the three pipes in the prior art is operated, the bridge plug setting tool is used for taking the lower bridge plug, the lower bridge plug is lost to the underground setting, the lower pipe column is used for setting the upper bridge plug, the upper sealing insertion pipe on the lower outer layer oil pipe belt is inserted and sealed with the upper bridge plug, and finally the lower sealing insertion pipe on the lower inner layer oil pipe belt is inserted and sealed with the lower bridge plug, at least five pipe columns are needed for pipe column construction, the construction cost is high, the construction period is long, and any one of the five pipe columns is abnormal, the construction progress can be influenced, and the whole water injection pipe cannot be normally delivered.
Disclosure of Invention
The invention aims to solve the technical problems that: the three-pipe concentric layered water injection pipe column has the advantages of high construction speed, low cost, high reliability and the like, and can be constructed only by two pipe columns when the three-pipe concentric layered water injection pipe column is constructed.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a concentric layering water injection tubular column of three pipes, including outer oil pipe, upper bridge plug, lower floor's bridge plug, upper seal intubate with outer oil pipe intercommunication is inserted to upper bridge plug, be equipped with in the upper seal intubate with the coaxial interlayer oil pipe of upper seal intubate, lower seal intubate of being connected with interlayer oil pipe is inserted to lower floor's bridge plug, be equipped with the soluble metal end cap of temporarily sealing the annular space between upper seal intubate and the interlayer oil pipe in upper seal intubate lower extreme, be equipped with the temporary plug in the lower extreme of lower seal intubate, lower seal intubate overcoat below the lower floor bridge plug is equipped with the lower floor bridge plug setting tool that makes lower floor bridge plug seat seal through interlayer oil pipe pressing, be connected with the upper bridge plug setting tool that makes upper bridge plug seat seal through annular space between outer oil pipe and the interlayer oil pipe on the outer oil pipe of upper seal intubate.
As a further improvement of the invention: the upper bridge plug setting tool is a releasing setting tool which can be lifted out together with the outer layer oil pipe and the upper layer sealing insertion pipe.
As a further improvement of the invention: a soluble metal baffle ring for preventing the interlayer oil pipe and the outer layer oil pipe from generating axial relative movement in the process of lowering the tubular column is arranged between the outer layer oil pipe and the interlayer oil pipe.
As a further improvement of the invention: the lower-layer limiting device for preventing the lower-layer bridge plug and the lower-layer bridge plug setting tool from moving axially along the lower-layer sealing insertion pipe is arranged on the pipe column and consists of an annular boss arranged on the interlayer oil pipe and an annular table arranged on the temporary plug.
As a further improvement of the invention: the upper bridge plug setting tool and the lower bridge plug setting tool are both setting tools with double setting hydraulic cylinders.
As a further improvement of the invention: the upper bridge plug setting tool comprises an upper sealing tube connected with an upper sealing insertion tube, a connecting sleeve is connected to the upper end of the upper sealing tube through threads, an upper tool outer sleeve and an upper tool upper protective cap are sleeved on the outer side of the connecting sleeve, an upper bridge plug first setting piston is arranged between the upper tool outer sleeve and the upper sealing tube, an upper bridge plug setting push tube for receiving the thrust of the upper bridge plug first setting piston is sleeved on the outer side of the upper sealing tube, the upper bridge plug first setting piston is provided with an upper extension tube extending upwards along the inner ring of the upper tool outer sleeve, an upper setting liquid cylinder is arranged between the upper extension tube and the upper sealing tube, an upper bridge plug second setting piston for applying thrust to the upper end of the upper extension tube when pressing is arranged in the upper setting liquid cylinder, and an upper bridge plug first pressing liquid hole for enabling pressing liquid to reach the upper bridge plug first setting piston and an upper bridge plug second pressing liquid hole for enabling pressing liquid to reach the upper bridge plug second setting piston are arranged on the upper sealing tube.
As a further improvement of the invention: the lower bridge plug setting tool comprises a lower sealing tube connected with a lower joint of the lower bridge plug, the inner wall of the lower sealing tube is in sliding sealing fit with the outer wall of the lower sealing tube, the lower end of the lower sealing tube is provided with a lower tool lower joint through threaded connection, a lower tool outer sleeve and a lower tool lower protective cap are sleeved on the outer side of the lower tool lower joint, a lower bridge plug first setting piston is arranged between the lower tool outer sleeve and the lower sealing tube, a lower bridge plug setting plunger receiving the thrust of the lower bridge plug first setting piston is sleeved on the outer side of the lower bridge plug lower joint, the lower bridge plug first setting piston is provided with a lower extension tube extending downwards along the inner ring surface of the lower tool outer sleeve, a lower bridge plug second setting piston applying thrust to the lower end of the lower extension tube is arranged in the lower sealing cylinder, a lower bridge plug first setting piston and a lower bridge plug first setting piston pressing hole enabling the liquid to reach the lower bridge plug first setting piston pressing down, and a lower bridge plug second setting piston pressing hole enabling the lower bridge plug to reach the lower bridge plug first setting piston pressing hole is arranged on the lower sealing tube, and the lower bridge plug second setting piston pressing hole is arranged between the lower bridge plug first setting piston and the lower sealing tube pressing hole is also connected with the lower sealing tube.
As a further improvement of the invention: an outer layer oil pipe centralizer is arranged between the outer layer oil pipe and the upper layer bridge plug setting tool.
As a further improvement of the invention: the upper end of the upper layer bridge plug is provided with a guide plate for guiding the upper layer sealing insertion tube to enter the upper layer bridge plug central tube, and the upper end of the lower layer bridge plug is provided with a guide plate for guiding the lower layer sealing insertion tube to enter the lower layer bridge plug central tube.
As a further improvement of the invention: the upper end of the interlayer oil pipe is provided with a sealing plug sleeve which enables the interlayer oil pipe to be connected with the inner layer oil pipe, and a one-way lock spring which prevents the inner layer oil pipe sealing plug from falling off from the sealing plug sleeve is arranged in the sealing plug sleeve.
The beneficial effects are that: the invention relates to a three-pipe concentric layered water injection pipe column, which adopts the technical proposal that the lower end of an upper layer sealing insertion pipe is provided with a soluble metal plug for temporarily sealing an annular space between the upper layer sealing insertion pipe and an interlayer oil pipe, the lower end of a lower layer sealing insertion pipe is provided with a temporary plug, the lower layer sealing insertion pipe below the lower layer bridge plug is sleeved with a lower layer bridge plug setting tool for setting the lower layer bridge plug by pressing the interlayer oil pipe, the outer layer oil pipe above the upper layer bridge plug is connected with an upper layer bridge plug setting tool for setting the upper layer bridge plug by pressing the annular space between the outer layer oil pipe and the interlayer oil pipe, and the outer layer oil pipe is used for carrying the upper layer bridge plug, the upper layer bridge plug setting tool during construction, The upper layer sealing insertion pipe, the lower layer bridge plug setting tool and the lower layer sealing insertion pipe are lifted and lowered into the well, then the lower inner layer oil pipe is in butt joint with the interlayer oil pipe, the lower layer bridge plug is pressed and set from the inner layer oil pipe, and the upper layer bridge plug is pressed and set from the annular space of the inner layer oil pipe and the outer layer oil pipe, so that the construction can be completed through two pipe columns. Because the upper bridge plug setting tool is adopted as the releasing type setting tool which can be lifted up together with the outer layer oil pipe and the upper layer sealing insertion pipe, if abnormality occurs in the water injection process of the three-pipe concentric layered water injection pipe column, the upper layer bridge plug setting tool and the upper layer sealing insertion pipe can be lifted up together through the upper layer oil pipe, the inner layer oil pipe, the interlayer insertion pipe and the lower layer sealing insertion pipe can be lifted up together, and then the lower layer sealing insertion pipe and the lower layer sealing insertion pipe are put into the pipe for secondary operation according to the construction mode of the common multi-pipe concentric layered water injection pipe column, so that the pipe column can be repaired and used for multiple times. Because the technical characteristics that the interlayer oil pipe and the outer layer oil pipe are prevented from generating axial relative movement in the process of lowering the pipe column are adopted, the bridge plug is prevented from being displaced in the process of lowering the pipe column, after the construction of the pipe column is finished, the soluble metal baffle ring is dissolved under the action of an underground oil-water mixture, the constraint of the outer layer oil pipe on the interlayer oil pipe is relieved, the interlayer oil pipe and the lower layer sealing insertion pipe can be independently started, and in the water injection process, the peristaltic movement of the outer layer oil pipe and the interlayer oil pipe is not interfered with each other. The lower limiting device is arranged on the pipe column and used for preventing the lower bridge plug and the lower bridge plug setting tool from moving along the axial direction of the lower sealing insertion pipe, and the lower limiting device is technically characterized by comprising an annular boss arranged on an interlayer oil pipe and an annular table arranged on a temporary plug, so that the three-pipe concentric separated layer water injection pipe column is more compact in structure on the premise of ensuring the lower bridge plug setting effect. Because the upper-layer bridge plug setting tool and the lower-layer bridge plug setting tool are both the technical characteristics of the setting tool with double setting hydraulic cylinders, the thrust of the setting tool to the bridge plug rubber cylinder is larger, the setting of the bridge plug is firmer, and the service life of the pipe column is longer. Because the upper bridge plug setting tool comprises an upper sealing tube connected with an upper sealing insertion tube, a connecting sleeve is connected at the upper end of the upper sealing tube through threads, an upper tool outer sleeve and an upper tool upper protective cap are sleeved outside the connecting sleeve, an upper bridge plug first setting piston is arranged between the upper tool outer sleeve and the upper sealing tube, an upper bridge plug setting push cylinder for receiving the thrust of the upper bridge plug first setting piston is sleeved outside the upper sealing tube, the upper bridge plug first setting piston is provided with an upper extension cylinder extending upwards along the inner ring of the upper tool outer sleeve, an upper setting liquid cylinder is arranged between the upper extension cylinder and the upper sealing tube, an upper bridge plug second setting piston for applying thrust to the upper end of the upper extension cylinder when the upper setting liquid cylinder is provided with a pressing, the upper sealing pipe is provided with an upper layer bridge plug first pressing liquid hole for enabling pressing liquid to reach an upper layer bridge plug first setting piston and an upper layer bridge plug second pressing liquid hole for enabling pressing liquid to reach an upper layer bridge plug second setting piston, so that the upper layer bridge plug can be stably set by pressing through an annular space between an inner layer oil pipe and an outer layer oil pipe, and an upper layer setting tool and the upper layer bridge plug can be enabled to be released by lifting the outer layer oil pipe without affecting the drilling and removal of the upper layer bridge plug. Because the lower bridge plug setting tool comprises the lower sealing tube connected with the lower joint of the lower bridge plug, the inner wall of the lower sealing tube is in sliding sealing fit with the outer wall of the lower sealing insertion tube, the lower end of the lower sealing tube is connected with the lower joint of the lower tool through threads, the outer side of the lower joint of the lower tool is sleeved with the lower tool jacket and the lower tool lower protective cap, the lower bridge plug first setting piston is arranged between the lower tool jacket and the lower sealing tube, the outer side of the lower joint of the lower bridge plug is sleeved with the lower bridge plug setting pushing tube for receiving the thrust of the lower bridge plug first setting piston, the lower bridge plug first setting piston is provided with the lower extension tube which extends downwards along the inner ring surface of the lower tool jacket, a lower setting hydraulic cylinder is arranged between the lower extension cylinder and the lower sealing pipe, a lower-layer bridge plug second setting piston which applies thrust to the lower end of the lower extension cylinder when pressing is arranged in the lower setting hydraulic cylinder, a lower-layer bridge plug first pressing liquid hole which enables the pressing liquid to reach the lower-layer bridge plug first setting piston and a lower-layer bridge plug second pressing liquid hole which enables the pressing liquid to reach the lower-layer bridge plug second setting piston are arranged on the lower sealing pipe, a lower-layer bridge plug pressing total hole is arranged on the lower-layer sealing insertion pipe, an annular lower-layer bridge plug pressing channel which is communicated with the lower-layer bridge plug pressing total hole and the lower-layer bridge plug first pressing liquid hole and the lower-layer bridge plug second pressing liquid hole is also arranged between the lower-layer sealing insertion pipe and the lower sealing pipe, the lower bridge plug can be stably set by pressing the inner layer oil pipe, and the lower setting tool is positioned below the lower bridge plug and cannot influence the drilling of the lower bridge plug. Because the outer layer oil pipe centralizer is arranged between the outer layer oil pipe and the upper layer bridge plug setting tool, the upper end of the upper layer bridge plug is provided with the guide piece for guiding the upper layer sealing insertion pipe to enter the upper layer bridge plug central pipe, and the upper end of the lower layer bridge plug is provided with the guide piece for guiding the lower layer sealing insertion pipe to enter the lower layer bridge plug central pipe, the inner layer oil pipe is more convenient to butt joint with the interlayer oil pipe, and the upper layer sealing insertion pipe is more accurate to plug with the upper layer bridge plug and the lower layer sealing insertion pipe is more accurate to plug with the lower layer bridge plug during secondary operation. Due to the adoption of the technical characteristics that the sealing plug sleeve which enables the interlayer oil pipe to be connected with the inner layer oil pipe is arranged at the upper end of the interlayer oil pipe, and the unidirectional lock spring which prevents the inner layer oil pipe sealing plug from falling off from the sealing plug sleeve is arranged in the sealing plug sleeve, the inner layer oil pipe can be in butt joint with the sealing plug sleeve through the inner layer oil pipe sealing plug, and the interlayer oil pipe and the lower layer sealing plug pipe which are connected with the inner layer oil pipe sealing plug can be lifted out together through the inner layer oil pipe, so that the operation is more convenient.
Drawings
The three-pipe concentric separate layer water injection pipe column of the invention is further described in detail below with reference to the accompanying drawings.
FIG. 1 is a longitudinal cross-sectional view of a three-tube concentric split-level water injection string of the present invention.
Detailed Description
As shown in fig. 1, the three-pipe concentric layered water injection pipe column comprises an outer layer oil pipe 4, an upper layer bridge plug III and a lower layer bridge plug IV, wherein an upper layer sealing insertion pipe 20 communicated with the outer layer oil pipe is inserted in the upper layer bridge plug, an interlayer oil pipe 6 coaxial with the upper layer sealing insertion pipe is arranged in the upper layer sealing insertion pipe, a lower layer sealing insertion pipe 23 connected with the interlayer oil pipe is inserted in the lower layer bridge plug, a soluble metal plug 21 for temporarily sealing an annular space between the upper layer sealing insertion pipe and the interlayer oil pipe is arranged at the lower end of the upper layer sealing insertion pipe, a temporary plug 36 is arranged at the lower end of the lower layer sealing insertion pipe, the temporary plug is fixed at the lower end of the lower layer sealing insertion pipe through a temporary plug shear pin 35, a lower layer bridge plug setting tool V for setting the lower layer bridge plug through pressing the interlayer oil pipe is sleeved outside the lower layer sealing insertion pipe below the lower layer bridge plug, an upper layer bridge plug setting tool II for setting the upper layer bridge plug through pressing the annular space between the outer layer oil pipe and the interlayer oil pipe is connected with the outer layer bridge plug, and the upper layer bridge plug setting tool I can be arranged between the upper layer bridge plug setting tool and the upper layer sealing insertion pipe and the outer layer sealing insertion pipe setting tool. The soluble metal plug temporarily seals the annular space between the upper layer sealing insertion pipe and the interlayer oil pipe, so that the upper layer bridge plug can be sealed by pressing the annular space between the outer layer oil pipe and the interlayer oil pipe, the lower end of the lower layer sealing insertion pipe is sealed by the temporary plug, the lower layer bridge plug can be sealed by pressing the interlayer oil pipe, and after the upper layer bridge plug and the lower layer bridge plug are sealed, the soluble metal plug is dissolved under the action of a downhole oil-water mixture, and an annular upper layer water filling port is formed at the lower end of the upper layer sealing insertion pipe; pressing from the interlayer oil pipe continuously, temporarily blocking destroy, and forming a lower water filling port at the lower end of the lower sealing insertion pipe.
In order to prevent the relative position of the lower bridge plug and the upper bridge plug from changing in the process of descending the pipe column, a soluble metal baffle ring 5 for preventing the interlayer oil pipe and the outer oil pipe from generating axial relative movement in the process of descending the pipe column is arranged between the outer oil pipe and the interlayer oil pipe. The lower limiting device for preventing the lower bridge plug and the lower bridge plug setting tool from moving axially along the lower sealing insertion pipe is arranged on the pipe column and consists of an annular boss 22 arranged on an interlayer oil pipe and an annular table 40 arranged on a temporary plug, so that the setting tool can push the rubber barrel of the bridge plug upwards when being pressed, and the bridge plug is set. In order to ensure the setting effect and provide enough setting thrust for the bridge plug, the upper bridge plug setting tool and the lower bridge plug setting tool in the pipe column are both setting tools with double setting hydraulic cylinders.
In the pipe column, an upper-layer bridge plug setting tool comprises an upper sealing pipe 17 connected with an upper-layer sealing insertion pipe, a connecting sleeve 7 is connected to the upper end of the upper sealing pipe through threads, an upper-layer tool outer sleeve 11 and an upper-layer tool upper protective cap 8 are sleeved outside the connecting sleeve, an upper-layer bridge plug first setting piston 15 is arranged between the upper-layer tool outer sleeve and the upper sealing pipe, an upper-layer bridge plug setting push cylinder 16 for receiving the thrust of the upper-layer bridge plug first setting piston is sleeved outside the upper sealing pipe, the upper-layer bridge plug first setting piston is provided with an upper extension cylinder 12 extending upwards along the inner ring of the upper-layer tool outer sleeve, an upper-layer bridge plug second setting piston 10 for applying thrust to the upper end of the upper extension cylinder when the upper setting liquid cylinder is provided with a pressing liquid hole 14 for enabling the pressing liquid to reach the upper-layer bridge plug first setting piston and an upper-layer bridge plug second setting piston pressing liquid hole 9 for enabling the pressing liquid to reach the upper-layer bridge plug second setting piston are arranged on the upper sealing pipe.
In the pipe column of the invention, the lower bridge plug setting tool comprises a lower sealing pipe 26 connected with a lower bridge plug lower joint 24, the lower sealing pipe is sleeved outside a lower sealing insertion pipe, the inner wall of the lower sealing pipe is in sliding sealing fit with the outer wall of the lower sealing insertion pipe, the lower end of the lower sealing pipe is connected with a lower tool lower joint 39 through threads, a lower tool outer sleeve 29 and a lower tool lower protective cap 34 are sleeved outside the lower tool lower joint, a lower bridge plug first setting piston 27 is arranged between the lower tool outer sleeve and the lower sealing pipe, a lower bridge plug setting push cylinder 25 for receiving the thrust of the lower bridge plug first setting piston is sleeved outside the lower bridge plug lower joint, the lower bridge plug first setting piston is provided with a lower extension cylinder 30 extending downwards along the inner ring surface of the lower tool outer sleeve, a lower setting hydraulic cylinder 31 is arranged between the lower extension cylinder and the lower sealing pipe, a lower bridge plug second setting piston 32 which applies thrust to the lower end of the lower extension cylinder when pressing is arranged in the lower setting hydraulic cylinder, a lower bridge plug first pressing hydraulic hole 28 which enables pressing liquid to reach the lower bridge plug first setting piston and a lower bridge plug second pressing hydraulic hole 33 which enables pressing liquid to reach the lower bridge plug second setting piston are arranged on the lower sealing pipe, a lower bridge plug pressing total hole 38 is arranged on the lower sealing insertion pipe, and an annular lower bridge plug pressing channel 37 which is communicated with the lower bridge plug pressing total hole and the lower bridge plug first pressing hydraulic hole and the lower bridge plug second pressing hydraulic hole is also arranged between the lower sealing insertion pipe and the lower sealing pipe.
Preferably, the upper end of the upper bridge plug is provided with a guide piece 18 for guiding the upper sealing cannula into the central tube of the upper bridge plug, and the upper end of the lower bridge plug is provided with a guide piece 41 for guiding the lower sealing cannula into the central tube of the lower bridge plug. When the water injection pipe column is abnormal, the upper bridge plug setting tool, the upper sealing insertion pipe, the interlayer oil pipe and the lower sealing insertion pipe can be lifted out, the upper bridge plug and the lower bridge plug are left underground, and then the upper sealing insertion pipe and the lower sealing insertion pipe are re-inserted. In the process of inserting the upper layer sealing insert and the lower layer sealing insert, the guide piece can guide the upper layer sealing insert and the lower layer sealing insert to accurately enter the central tube of the upper layer bridge plug and the central tube of the lower layer bridge plug, so that the construction is more convenient.
Preferably, a sealing plug sleeve 3 for connecting the interlayer oil pipe with the inner layer oil pipe is arranged at the upper end of the interlayer oil pipe, a unidirectional locking spring 2 for preventing the inner layer oil pipe sealing plug from falling off from the sealing plug sleeve is arranged in the sealing plug sleeve, the inner layer oil pipe with the sealing plug 1 is put down after the pipe column is put down in the well, the inner layer oil pipe is butted with the interlayer oil pipe, annular spaces of the inner layer oil pipe and the inner layer oil pipe as well as the outer layer oil pipe are respectively pressed, the lower bridge plug and the lower bridge plug are respectively sealed, finally water is injected from the inner layer oil pipe to the lower layer, water is injected from the annular spaces of the outer layer oil pipe and the inner layer oil pipe to the upper layer, and the interlayer oil pipe and the lower sealing plug pipe can be independently lifted out through lifting the inner layer oil pipe.
Preferably, the upper bridge plug and the lower bridge plug are drillable bridge plugs, so that the upper setting tool, the upper sealing cannula and the lower sealing cannula can be lifted out after water injection is finished, and the bridge plugs can be conveniently removed. And the lower setting tool is arranged below the lower bridge plug, so that the drilling of the lower bridge plug is not influenced. In order to ensure the sealing effect between the bridge plug and the sealing cannula, a liner tube 19 is arranged in the middle inner tube of the drillable bridge plug, and the inner wall of the liner tube is in clearance sealing fit with the pump on the outer wall of the sealing cannula.
The construction method of the three-pipe concentric separate layer water injection pipe column comprises the following steps: connecting the tubular column with an outer-layer oil pipe after the tubular column is assembled as shown in fig. 1, lowering the tubular column to a specified underground position by using the outer-layer oil pipe, then lowering an inner-layer oil pipe with a sealing plug at the lower end into the underground from the outer-layer oil pipe, butting a sealing plug sleeve at the upper end of the interlayer oil pipe, pressurizing an annulus between the outer-layer oil pipe and the inner-layer oil pipe, setting an upper-layer bridge plug, dissolving a soluble metal plug at the lower end of an upper-layer sealing insertion pipe under the action of an underground oil-water mixture, forming an annular upper-layer water injection port at the lower end of the upper-layer sealing insertion pipe, and opening an upper-layer water injection channel; pressing from the inner layer oil pipe to enable the lower layer bridge plug to be seated, continuing pressing from the inner layer oil pipe after the seated is finished, breaking the temporary blocking fixed shear pin at the lower end of the lower layer sealing insertion pipe, and forming a lower layer water injection port at the lower end of the lower layer sealing insertion pipe to open a water injection channel from the inner layer oil pipe to the lower layer. Simultaneously, after the temporary plug destroy, the limit of the lower end of the lower layer sealing insertion pipe is released, so that the lower layer sealing insertion pipe can be lifted out together with the interlayer oil pipe and the inner layer oil pipe, and the secondary operation is convenient.
The main improvement of the invention compared with the prior art is the integral structure of the pipe column, so the bridge plug is not described in more detail, the specific structure of the bridge plug can refer to fig. 1, and the hydraulic setting, two-way anchoring and compression type water injection bridge plug with other structures can be selected according to actual needs.
Claims (7)
1. The utility model provides a concentric layering water injection tubular column of three pipes, includes outer oil pipe, upper bridge plug, lower floor's bridge plug, inserts the sealed intubate in upper strata with the upper strata of outer oil pipe intercommunication in the upper bridge plug, is equipped with the coaxial interlayer oil pipe of sealed intubate in upper strata in the sealed intubate in upper strata, has the sealed intubate in lower floor that is connected with interlayer oil pipe in lower floor's bridge plug, characterized by: a soluble metal plug for temporarily sealing the annular space between the upper layer sealing insertion pipe and the interlayer oil pipe is arranged at the lower end of the upper layer sealing insertion pipe, a temporary plug is arranged at the lower end of the lower layer sealing insertion pipe, a lower layer bridge plug setting tool for setting the lower layer bridge plug by pressing the interlayer oil pipe is sleeved outside the lower layer sealing insertion pipe below the lower layer bridge plug, an upper bridge plug setting tool for setting the upper bridge plug through pressurizing an annular space between the outer layer oil pipe and the interlayer oil pipe is connected to the outer layer oil pipe above the upper bridge plug; the upper bridge plug setting tool comprises an upper sealing tube connected with an upper sealing insertion tube, a connecting sleeve is connected at the upper end of the upper sealing tube through threads, an upper tool outer sleeve and an upper tool upper protective cap are sleeved outside the connecting sleeve, an upper bridge plug first setting piston is arranged between the upper tool outer sleeve and the upper sealing tube, an upper bridge plug setting push cylinder for receiving the thrust of the upper bridge plug first setting piston is sleeved outside the upper sealing tube, the upper bridge plug first setting piston is provided with an upper extension cylinder extending upwards along the inner ring of the upper tool outer sleeve, an upper setting hydraulic cylinder is arranged between the upper extension cylinder and the upper sealing tube, an upper bridge plug second setting piston for applying thrust to the upper end of the upper extension cylinder during pressing is arranged in the upper setting hydraulic cylinder, an upper-layer bridge plug first pressurizing liquid hole for enabling pressurizing liquid to reach an upper-layer bridge plug first setting piston and an upper-layer bridge plug second pressurizing liquid hole for enabling pressurizing liquid to reach an upper-layer bridge plug second setting piston are formed in the upper sealing pipe; the lower bridge plug setting tool comprises a lower sealing tube connected with a lower joint of the lower bridge plug, the inner wall of the lower sealing tube is in sliding sealing fit with the outer wall of the lower sealing insertion tube, the lower end of the lower sealing tube is connected with the lower joint of the lower tool through threads, a lower tool jacket and a lower tool lower protective cap are sleeved outside the lower joint of the lower tool, a lower bridge plug first setting piston is arranged between the lower tool jacket and the lower sealing tube, a lower bridge plug setting push cylinder for receiving the thrust of the lower bridge plug first setting piston is sleeved outside the lower bridge plug lower joint, the lower bridge plug first setting piston is provided with a lower extension cylinder extending downwards along the inner ring surface of the lower tool jacket, a lower setting hydraulic cylinder is arranged between the lower extension cylinder and the lower sealing tube, a lower-layer bridge plug second setting piston which applies thrust to the lower end of the downward extension cylinder when the lower setting cylinder is pressurized is arranged in the lower setting hydraulic cylinder, a lower-layer bridge plug first pressurizing liquid hole which enables pressurizing liquid to reach the lower-layer bridge plug first setting piston and a lower-layer bridge plug second pressurizing liquid hole which enables pressurizing liquid to reach the lower-layer bridge plug second setting piston are arranged on the lower sealing insertion tube, a lower-layer bridge plug pressurizing total hole is arranged on the lower sealing insertion tube, and an annular lower-layer bridge plug pressurizing channel which is communicated with the lower-layer bridge plug pressurizing total hole and the lower-layer bridge plug first pressurizing liquid hole and the lower-layer bridge plug second pressurizing liquid hole is also arranged between the lower sealing insertion tube and the lower sealing tube; the upper end of the upper layer bridge plug is provided with a guide plate for guiding the upper layer sealing insertion tube to enter the upper layer bridge plug central tube, and the upper end of the lower layer bridge plug is provided with a guide plate for guiding the lower layer sealing insertion tube to enter the lower layer bridge plug central tube.
2. The three-pipe concentric split-level water injection string of claim 1, wherein: the upper bridge plug setting tool is a releasing setting tool which can be lifted out together with the outer layer oil pipe and the upper layer sealing insertion pipe.
3. The three-pipe concentric split-level water injection string of claim 2, wherein: a soluble metal baffle ring for preventing the interlayer oil pipe and the outer layer oil pipe from generating axial relative movement in the process of lowering the tubular column is arranged between the outer layer oil pipe and the interlayer oil pipe.
4. The three-pipe concentric split-level water injection string of claim 1, wherein: the lower-layer limiting device for preventing the lower-layer bridge plug and the lower-layer bridge plug setting tool from moving axially along the lower-layer sealing insertion pipe is arranged on the pipe column and consists of an annular boss arranged on the interlayer oil pipe and an annular table arranged on the temporary plug.
5. A three-pipe concentric zoned water injection string as claimed in any one of claims 1 to 4, wherein: the upper bridge plug setting tool and the lower bridge plug setting tool are both setting tools with double setting hydraulic cylinders.
6. The three-pipe concentric layered water injection string of claim 5, wherein: an outer layer oil pipe centralizer is arranged between the outer layer oil pipe and the upper layer bridge plug setting tool.
7. The three-pipe concentric split-level water injection string of claim 1, wherein: the upper end of the interlayer oil pipe is provided with a sealing plug sleeve which enables the interlayer oil pipe to be connected with the inner layer oil pipe, and a one-way lock spring which prevents the inner layer oil pipe sealing plug from falling off from the sealing plug sleeve is arranged in the sealing plug sleeve.
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| CN202010707513.1A CN111706306B (en) | 2020-07-22 | 2020-07-22 | Three-pipe concentric layered water injection pipe column |
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| CN202010707513.1A CN111706306B (en) | 2020-07-22 | 2020-07-22 | Three-pipe concentric layered water injection pipe column |
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| CN112360431A (en) * | 2020-11-11 | 2021-02-12 | 中石化石油工程技术服务有限公司 | Oil and gas well multilayer testing device and testing method |
| CN115182701A (en) * | 2021-04-06 | 2022-10-14 | 中国石油天然气股份有限公司 | Gas sealing tool and method |
| CN116066011B (en) * | 2023-03-20 | 2023-06-16 | 四川圣诺油气工程技术服务有限公司 | Oil pipe plug and use method thereof |
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