CN112443285B - Sand control device capable of replacing slurry outside pipe and slurry replacing method - Google Patents
Sand control device capable of replacing slurry outside pipe and slurry replacing method Download PDFInfo
- Publication number
- CN112443285B CN112443285B CN201910821582.2A CN201910821582A CN112443285B CN 112443285 B CN112443285 B CN 112443285B CN 201910821582 A CN201910821582 A CN 201910821582A CN 112443285 B CN112443285 B CN 112443285B
- Authority
- CN
- China
- Prior art keywords
- slurry
- valve
- replacing
- pipe
- replacing valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/08—Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs
Abstract
The invention provides a sand control device capable of replacing slurry outside a pipe and a slurry replacing method. The device comprises a sleeve (1), a slurry replacing pipe column (2), a hanger (3), an upper slurry replacing valve (4), an upper server (5), a lower slurry replacing valve (6), a lower server (7) and a screen pipe (8); the upper slurry replacing valve (4) is connected to the upper part of the screen pipe (8), and the lower slurry replacing valve (6) is connected to the screen pipe (8) at a position close to the bottom; the upper slurry replacing valve (4), the lower slurry replacing valve (6) and the sieve tube (8) form an integral sieve tube (9), and the integral sieve tube (9) is arranged in the inner cavity of the sleeve (1) through the hanger (3); the slurry replacing pipe column (2) can pass through the upper slurry replacing valve (4) up and down in the sieve tube (8) and can be inserted into the lower slurry replacing valve (6); the lower server (7) is arranged at the bottom of the slurry replacing pipe column (2), and the upper server (5) is arranged on the outer wall of the slurry replacing pipe column (2).
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to an out-pipe slurry-replaceable sand control device and a slurry-replaceable method.
Background
Most of Liaohe oilfield reservoirs are loose sandstone oil and gas reservoirs, sand production problems are serious, and necessary sand prevention measures must be adopted in the production process. The screen sand control technology is widely applied as a simple and effective sand control mode, the screen types widely applied in the oil field at present can be divided into a gap screen and a filter screen according to the types of the flow channels, the flow channels of the gap screen are various types of flow channels, and the structure of the multi-layer filter screen of the flow channels of the filter screen. The screen pipe of the filter screen structure has the advantages of high sand blocking precision and large overflow area, and is widely and increasingly applied, wherein the Chinese patent ZL200620013097.0 discloses an elastic single screen pipe, ZL 20120242225. X discloses a star-hole sintering sand prevention screen pipe, and ZL201120178131.0 discloses a spiral screen pipe which is a filter screen type sand prevention screen pipe.
The filter screen sand control screen has the remarkable advantages of high sand blocking precision and overflow area, and has good application effect in oil field blocks with high production fluid and small sand grain diameter, particularly in new production oil wells with higher production. However, due to the specificity of the sand blocking structure of the screen pipe filter screen, tiny solid particles in the stratum, such as fine silt and the like, easily enter the filter screen to cause blockage.
In the drilling process, drilling fluid (i.e. slurry) is needed to carry underground broken stratum rock particles out of the ground, stabilize the well wall and the like, and in a new well needing screen pipe sand prevention, generally after drilling, a screen pipe is put under a casing or hung at the bottom of the casing by a packer, and the inside of the screen pipe and the outside of the screen pipe are filled with the drilling fluid (as shown in a of fig. 1).
There is no tool or process available to displace the drilling fluid outside the screen out of the surface.
The underground drilling fluid needs to be replaced by clear water out of the ground before the production of the oil well, the process is to replace the mud inside the screen pipe out of the ground, the mud between the screen pipe and the casing is still left in the stratum (shown as d in fig. 1), and the mud between the screen pipe and the casing enters the screen pipe along with the production fluid of the stratum in the oil and gas production process. Because of a large amount of tiny solid particles in drilling fluid (namely mud) in the drilling process, the screen pipe of a filter screen is easy to block, and the subsequent production is influenced. The filter screen medium of the sieve tube is easy to be blocked, and the normal production of oil gas is influenced.
In FIG. 1, a is a schematic diagram of a slurry filling a screen and between the screen and a casing after a sand control completion of a new well screen of the prior art; b is a pipe column schematic diagram of the slurry replacement with clear water after completion; c is a schematic diagram of liquid flow in the slurry replacement process; d is a schematic of the mud remaining between the screen and the formation after the slurry is displaced.
Disclosure of Invention
The invention aims to provide an out-pipe slurry-replaceable sand control device;
another object of the invention is to provide a method of well casing slurry.
To achieve the above object, in one aspect, the present invention provides an out-pipe slurry-replaceable sand control device, wherein the device comprises a casing 1, a slurry-replacing pipe column 2, a hanger 3, an upper slurry-replacing valve 4, an upper server 5, a lower slurry-replacing valve 6, a lower server 7 and a screen pipe 8; the upper slurry replacing valve 4 is connected to the upper part of the screen pipe 8, and the lower slurry replacing valve 6 is connected to the screen pipe 8 at a position close to the bottom; the upper slurry replacing valve 4, the lower slurry replacing valve 6 and the sieve tube 8 form an integral sieve tube 9 together, and the integral sieve tube 9 is arranged in the inner cavity of the sleeve 1 through the hanger 3; the slurry replacing pipe column 2 can pass through the upper slurry replacing valve 4 to pass up and down in the sieve tube 8 and can be inserted into the lower slurry replacing valve 6; the lower server 7 is arranged at the bottom of the slurry replacing pipe column 2, and the upper server 5 is arranged on the outer wall of the slurry replacing pipe column 2; when the lower server 7 is inserted into the lower slurry replacing valve 6, the lower slurry replacing valve 6 is in an opened state so that the space between the casing 1 and the screen pipe 8 is communicated with the space inside the screen pipe 8 through the lower slurry replacing valve 6; when the upper server 5 is in butt joint with the upper slurry replacing valve 4, the upper slurry replacing valve 4 is in an open state, so that the space between the slurry replacing pipe column 2 and the casing 1 is communicated with the space between the sieve tube 8 and the casing 1 through the upper slurry replacing valve 4; the distance of the upper server 5 and the lower server 7 is comparable to the distance of the upper and lower pulp valves 4, 6, so that when the lower server 7 is inserted into the lower pulp valve 6 and the lower pulp valve is in an open state, the upper server 5 interfaces with the upper pulp valve 4 so that the upper pulp valve is in an open state.
The slurry replacing pipe column is a conventional oil pipe, and when liquid is injected into the oil pipe from the ground to replace slurry from an annulus between the oil pipe and the sieve tube, the oil pipe is called as the slurry replacing pipe column.
According to some embodiments of the invention, wherein the upper pulp valve 4 comprises an upper pulp valve outer tube 41, a sliding sleeve 42 and an upper pulp valve spring 43; the upper pulp replacing valve outer tube 41 is hollow and cylindrical, the top is provided with an upper pulp replacing valve first connecting device 411, the bottom is provided with an upper pulp replacing valve second connecting device 412, the side wall is provided with an upper pulp replacing valve overflow hole 413, the upper part of the inner wall is provided with a sliding sleeve limiting device 414, and the bottom is provided with a spring limiting device 415; the sliding sleeve 42 is slidably arranged in the inner cavity of the upper pulp replacing valve outer tube 41 and below the sliding sleeve limiting device 414, and the outer wall of the sliding sleeve 42 is attached to the inner wall of the upper pulp replacing valve outer tube 41; the upper slurry replacing valve spring 43 is arranged between the sliding sleeve 42 and the spring limiting device 415, and two ends of the upper slurry replacing valve spring 43 respectively lean against the lower surface of the side wall of the sliding sleeve 42 and the upper surface of the spring limiting device 415; when the sliding sleeve 42 slides upwards and abuts against the sliding sleeve limiting device 414, the sliding sleeve 42 closes the upper slurry replacing valve overflowing hole 413, the upper slurry replacing valve 4 is in a closed state, when the sliding sleeve 42 compresses the upper slurry replacing valve spring 43 to slide downwards, the upper slurry replacing valve overflowing hole 413 can be opened, a space between the slurry replacing pipe column 2 and the casing 1 is communicated with a space between the screen pipe 8 and the casing 1 through the upper slurry replacing valve overflowing hole 413, and the upper slurry replacing valve 4 is in an open state.
According to some embodiments of the present invention, the inner wall of the upper pulp valve outer tube 41 is provided with an axially inwardly contracted step to form the sliding sleeve stopper 414.
According to some embodiments of the invention, the inner wall of the outer tube 41 of the upper pulp replacing valve is provided with a guiding step 416 which is contracted inwards along the axial direction, and the guiding step 416 is positioned above the sliding sleeve limiting device 414.
According to some embodiments of the invention, wherein the upper pulp valve 4 further comprises an upper pulp valve upper joint 44 arranged at the top of the upper pulp valve 4; the top of the upper slurry replacing valve upper joint 44 is provided with an upper slurry replacing valve first connecting device 411, the bottom is provided with an upper slurry replacing valve third connecting device 441, and the upper slurry replacing valve upper joint 44 is connected with the top of the upper slurry replacing valve outer tube 41 through the upper slurry replacing valve third connecting device 441. According to some embodiments of the invention, the upper slurry valve 4 is arranged on top of the screen 8, and the integral screen 9 is connected to the hanger 3 by the upper slurry valve first connection means 411.
According to some embodiments of the present invention, the upper slurry replacing valve 4 further comprises an upper slurry replacing valve lower joint 45 disposed at the bottom of the upper slurry replacing valve 4, the upper slurry replacing valve lower joint 45 comprises an upper slurry replacing valve fourth connecting device 451 at the top and an upper slurry replacing valve second connecting device 412 at the bottom, and the upper slurry replacing valve lower joint 45 is connected to the bottom of the upper slurry replacing valve outer pipe 41 through the upper slurry replacing valve fourth connecting device 451 and is connected to the screen pipe 8 through the upper slurry replacing valve second connecting device 412.
According to some embodiments of the present invention, the upper portion of the upper slurry valve lower joint 45 extends into the inner cavity of the upper slurry valve outer tube 41, and a stepped spring stopper 415 is formed by the top upper surface of the upper slurry valve lower joint 45.
According to some embodiments of the invention, the upper pulp valves first connection 411, the upper pulp valves second connection 412, the upper pulp valves third connection 441 and the upper pulp valves fourth connection 451 are all screws.
According to some embodiments of the present invention, the lower pulp valve 6 comprises a lower pulp valve outer pipe 61, an inner pipe 62, a steel ball 63, a lower pulp valve spring 64 and an overflow valve 65; the lower pulp replacing valve outer tube 61 is hollow and cylindrical, the top of the hollow and the bottom of the hollow and cylindrical is closed, the inner tube 62 is arranged in the inner cavity of the lower pulp replacing valve outer tube 61, and is fixedly connected with the inner wall of the lower pulp replacing valve outer tube 61 through the upper part of the inner tube 62, and the outer wall of the lower part of the inner tube 62 is contracted inwards along the axial direction, so that a liquid flow passage 66 is formed between the outer wall of the lower part of the inner tube and the inner wall of the lower pulp replacing valve outer tube 61; the side wall of the lower part of the lower pulp replacing valve outer pipe 61 is provided with a lower pulp replacing valve overflow hole 611, and the inner space and the outer space of the lower pulp replacing valve outer pipe 61 are communicated through the lower pulp replacing valve overflow hole 611; the inner tube 62 is hollow and cylindrical, the top is open, the bottom is provided with an annular overflow valve 65 with a hole in the middle, and the liquid flow passage is communicated with the inner cavity of the inner tube 62 through the hole in the middle of the overflow valve 65; the lower pulp replacing valve spring 64 is arranged in the inner cavity of the inner tube 62, the lower end of the lower pulp replacing valve spring is abutted against the annular upper surface of the overflow valve 65, and the upper end of the lower pulp replacing valve spring is abutted against the bottom of the steel ball 63; the inner wall of the middle of the inner tube 62 is provided with a step which expands axially outwardly to form a downward ball seat 621, with the top of the ball 63 bearing upwardly against the lower edge of the ball seat 621 to prevent the ball from moving upwardly at the ball seat.
According to some embodiments of the present invention, wherein the upper inner wall of the inner tube 62 is provided with a slope 622 tapering axially inwardly from the top so as to move downwardly past the slope when the lower server 7 is inserted into the lower slurry valve 6.
According to some embodiments of the invention, the lower pulp valve 6 further comprises a lower pulp valve upper joint 67 arranged at the top of the lower pulp valve; the top of the upper joint 67 of the lower pulp replacing valve is provided with a first connecting device 671 of the lower pulp replacing valve, the bottom is provided with a second connecting device 672 of the lower pulp replacing valve, and the upper joint 67 of the lower pulp replacing valve is connected with the top of the outer tube 61 of the lower pulp replacing valve through the second connecting device 672 of the lower pulp replacing valve.
According to some embodiments of the present invention, the lower pulp replacing valve 6 further comprises a lower pulp replacing valve plug 68 disposed at the bottom of the lower pulp replacing valve outer tube 61, the lower pulp replacing valve outer tube 61 is hollow and cylindrical with both top and bottom open, and the bottom of the lower pulp replacing valve outer tube 61 is closed by the lower pulp replacing valve plug 68; the lower pulp valve plug 68 is provided with a lower pulp valve third connecting device 681 at the upper part, and the lower pulp valve plug 68 is fixedly connected with the lower pulp valve outer tube 61 through the lower pulp valve third connecting device 681.
According to some embodiments of the invention, the first connection device 671 of the lower pulp valves, the second connection device 672 of the lower pulp valves and the third connection device 681 of the lower pulp valves are all screws.
According to some embodiments of the invention, the compression distance of the lower pulp valve spring 64 is greater than the compression distance of the upper pulp valve spring 43.
According to some embodiments of the invention, the compression distance of the lower pulp valve spring 64 is 2 times the compression distance of the upper pulp valve spring 43.
According to some embodiments of the present invention, the upper server 5 includes at least one spring piece 51 disposed on the outer wall of the slurry pipe string 2 along the circumferential direction of the slurry pipe string 2, the height of the spring piece 51 protruding from the outer wall of the slurry pipe string 2, and the strength and elasticity of the spring piece 51 enable the spring piece 51 to pass through the upper slurry valve outer pipe 41 and push the sliding sleeve 42 downward when the slurry pipe string 2 runs downward.
According to some embodiments of the invention, the height of the spring piece 51 protruding from the outer wall of the slurry replacing pipe column 2 can enable the spring piece 51 to be in elastic contact with the inner wall of the screen pipe.
According to some embodiments of the present invention, the number of the spring pieces 51 is 4, and the spring pieces are uniformly arranged on the outer wall of the slurry replacing column along the circumferential direction of the slurry replacing column 2.
According to some embodiments of the present invention, the spring piece 51 is fixed on the outer wall of the slurry replacing pipe column 2 through a pin 52 arranged at the bottom of the spring piece.
According to some embodiments of the invention, a spring piece blocking device 53 is arranged at a corresponding position on the top of each spring piece 51 on the outer wall of the slurry replacing pipe column 2.
According to some embodiments of the invention, the spring leaf blocking device 53 is a spring leaf blocking ring arranged along the circumference of the slurry pipe string 2.
According to some embodiments of the present invention, the lower server 7 comprises a lower server string 72 with at least one through hole 71 arranged at the bottom of the slurry string 2, the outer diameter of the lower server string 72 matching the inner diameter of the inner tube 62 of the lower slurry valve 6.
According to some embodiments of the present invention, the through hole 71 is a notch formed from the top of the lower server column 72 along the axial direction of the lower server column 7.
According to some embodiments of the invention, the number of through holes 71 is four, and the through holes are uniformly distributed along the circumference of the lower server column 72.
According to some embodiments of the invention, the string further comprises a screen plug 10, which is arranged at the bottom of the screen 8.
In another aspect, the invention also provides a method for well casing slurry using the apparatus according to any of the preceding claims, wherein the method comprises the steps of:
(1) The integral screen pipe 9 is put into the casing 1, and the integral screen pipe 9 is fixed in the inner cavity of the casing 1 through the hanger 3;
(2) A slurry replacing pipe column 2 is put in, and when an upper server 5 approaches an upper slurry replacing valve 4, slurry in a screen pipe 8 is replaced out of the ground;
(3) Continuing to lower the slurry replacing pipe column 2, the upper server 5 and the lower server 7 respectively correspond to the upper slurry replacing valve 4 and the lower slurry replacing valve 6, and the distances are set as follows: the upper pulp replacing valve spring 43 is compressed, the sliding sleeve 42 moves downwards, when the upper pulp replacing valve overflow hole 413 is fully opened, the lower server 7 just contacts the steel ball 63 of the lower pulp replacing valve 6, the pulp replacing pipe column 2 is continuously lowered, and the lower pulp replacing valve 6 is propped against the steel ball 63 to move downwards so that the ball seat 621 is opened; pumping clear water into an annulus between the ground oil pipe and the sleeve 1 to displace slurry out of the ground;
(4) Lifting the slurry replacing pipe column 2, lifting the lower server 7 from the lower slurry replacing valve 6, and re-abutting the steel ball 63 on the ball seat 621 to enable the ball seat to be closed, wherein the upper slurry replacing valve overflow hole 413 is still in an open state, continuing to lift the slurry replacing pipe column 2, and enabling the upper slurry replacing valve overflow hole 413 to be closed; pumping clear water into an annulus between the ground oil pipe and the sleeve 1, flushing a filter layer of the screen pipe 8, and returning the clear water to the ground through the slurry replacing oil pipe until the liquid returned to the ground is clear water;
(5) And (5) after the slurry replacement is finished, lifting the slurry replacement pipe column 2 to the ground, and finishing the construction.
In summary, the invention provides a sand control device capable of replacing slurry outside a pipe and a slurry replacing method. The scheme of the invention has the following advantages:
according to the invention, in the process of replacing drilling fluid, the drilling fluid in the screen pipe is replaced out of the ground, and the drilling fluid between the screen pipe and the stratum annular space is replaced out of the ground, so that the phenomenon that the drilling fluid between the screen pipe and the stratum annular space enters the screen pipe in the oil well production process to block a filter medium, thereby influencing the service life of the screen pipe and the sand prevention effect is avoided.
Drawings
FIG. 1 is a schematic diagram of a prior art slurry replacement process;
FIG. 2 is a schematic view of the apparatus of example 1 of the present application;
FIG. 3 is a schematic diagram of a slurry replacement process according to example 1 of the present application;
FIG. 4 is a schematic view of the upper slurry replacing valve in embodiment 1 of the present application;
FIG. 5 is a schematic view of the lower slurry replacing valve in embodiment 1 of the present application;
FIG. 6 is a schematic view of the overflow valve of the lower pulp replacing valve of embodiment 1 of the present application;
FIG. 7 is a schematic view of the lower server inserted into the lower slurry replacing valve and the lower slurry replacing valve opened in the slurry replacing process of embodiment 1 of the present application;
fig. 8 is a schematic diagram of a slurry replacing pipe column in embodiment 1 of the present application.
Detailed Description
The following detailed description of the invention and the advantages achieved by the embodiments are intended to help the reader to better understand the nature and features of the invention, and are not intended to limit the scope of the invention.
Example 1
This embodiment is further described with reference to fig. 1-7:
the invention relates to an external pipe slurry-replacing sand control device and a use method thereof, wherein the external pipe slurry-replacing sand control device comprises: 1. a sleeve; 2. a slurry replacing tubular column; 3. a hanger; 4. the upper part replaces the pulp valve; 5. an upper server; 6. a lower slurry replacing valve; 7. a lower server; 8. a screen pipe; 10 plugs (as shown in fig. 2).
1. The sand control completion process comprises the following steps:
(1) The well drilling is completed, a casing pipe 1 is put into to seal an oil layer, well cementation and perforation are carried out; (post completion string is shown in FIG. 1 a)
(2) The integral screen pipe 9 is put into an oil layer section needing sand prevention, and the integral screen pipe is sequentially from bottom to top: the lower slurry replacing valve 6, 8 sieve tubes (sand preventing sieve tubes) and the upper slurry replacing valve 4 are suspended on the sleeve by a hanger 3.
The hanger, the sleeve and the screen pipe are mature technology at present.
2. The main parts of the well completion pipe column comprise:
(1) The upper pulp replacing valve 4 has a structure as shown in fig. 4 and comprises an upper pulp replacing valve upper joint 44, an upper pulp replacing valve outer pipe 41, a sliding sleeve 42, an upper pulp replacing valve spring 43, an upper pulp replacing valve lower joint 45 and an upper pulp replacing valve overflow hole 413.
The upper part is connected with an upper part slurry replacing valve upper joint and a lower part slurry replacing valve lower joint respectively from top to bottom, the upper part slurry replacing valve outer pipe is provided with an upper part slurry replacing valve overflow hole through screw threads, a female buckle at the upper part of the upper part slurry replacing valve upper joint is a common sleeve buckle which can be connected with a hanger, and a male buckle at the lower part of the lower joint is a common sleeve buckle which can be connected with a lower sieve tube.
The upper part of the sliding sleeve is provided with a slurry replacing valve spring, the sliding sleeve can move downwards axially under the action of the thrust from top to bottom of the upper part server, when the sliding sleeve moves to the lowest part, the slurry replacing valve overflow hole at the upper part is opened, and the annulus between the oil pipe (namely the pipe column part of the slurry replacing pipe column) and the casing is communicated with the annulus between the sieve pipe and the casing.
The upper inner side of the upper part of the outer tube of the upper pulp replacing valve is provided with a guide step 416 which axially contracts inwards, so that the upper server can downwards move through the guide step when being put in. The upper part is used for replacing the contact position between the outer tube of the slurry valve and the upper part of the sliding sleeve, a step 414 is arranged, a sliding sleeve limiting device 414 is formed on the sliding sleeve, and the sliding sleeve is prevented from sliding upwards (as shown in two enlarged views I and II in FIG. 4).
(2) The lower pulp valve 6 has a structure shown in fig. 5 and comprises a lower pulp valve outer pipe 61, an inner pipe 62, a steel ball 63, a lower pulp valve spring 64, a lower pulp valve upper joint 67, a lower pulp valve plug 68, a lower pulp valve overflow hole 611 and an overflow valve 65 (shown in fig. 6).
The upper part of the outer tube of the lower pulp replacing valve is connected with an upper joint of the lower pulp replacing valve, the lower part of the outer tube of the lower pulp replacing valve is connected with a plug of the lower pulp replacing valve, and a plurality of overflow holes of the lower pulp replacing valve are arranged on the outer tube of the lower pulp replacing valve. The female buckle at the upper part of the upper joint of the lower slurry replacing valve is a common sleeve buckle, and the upper part can be connected with a sieve tube.
The upper part of the inner pipe is connected with the outer pipe of the lower pulp replacing valve through screw threads, and a liquid flow passage 66 capable of flowing liquid is reserved between the outer pipe of the lower pulp replacing valve and the lower pulp replacing valve.
The inner side of the upper portion of the inner tube is provided with an axially inwardly tapered ramp 622 to facilitate downward movement of the lower server therethrough during the run-in.
The middle part of the inner tube is provided with a step with an expanded inner diameter to form a ball seat 621 for preventing the steel ball from moving upwards. The ball seat functions as a check valve: when the ball receives the effort of upper portion, for example receive lower server downward pressure or the liquid pressure in the slip pipe column, the spring can shrink, and the ball can move down, and the ball seat mouth is opened, slip valve inner space and slip valve outer space intercommunication, namely: the sieve sleeve annulus is communicated with the slurry replacing tubular column; and ball seat opening 6211 will not open if the ball is forced from below to above, and the space will not be in communication.
The lowest part of the inner pipe is connected with the overflow valve 65 through screw threads, the overflow valve is a circular ring with a hole in the middle, the function of a fixed spring is achieved, and meanwhile, liquid can be communicated up and down through the hole in the middle of the overflow valve.
The inner side of the upper part of the inner pipe is provided with a plurality of sealing rubber rings 69, and the sealing function is realized after the lower server is inserted into the lower slurry replacing valve.
When the lower server is inserted into the lower slurry replacing valve, the spring of the lower slurry replacing valve is compressed, the steel ball moves downwards, the outer annular space of the lower slurry replacing valve is communicated with the inner space of the lower slurry replacing valve, namely, the annular space between the sieve tube and the sleeve is communicated with the inner space of the sieve tube, and meanwhile, due to the sealing effect of the sealing rubber ring, the annular space between the sieve tube and the sleeve is communicated with the inner space of the slurry replacing tubular column.
3. String for replacing drilling fluid
As shown in fig. 7, the slurry-replacing column 2 is provided with an upper server 5, a leaf spring blocking ring 53, a pin 52, and a lower server 7 on the outer wall in the circumferential direction.
The upper server retainer ring is composed of four leaf springs (as shown inbase:Sub>A-base:Sub>A' of fig. 7). The spring piece needs to have certain strength, and can press down the ball seat of the upper pulp replacing valve to realize the opening of the overflow hole of the upper pulp replacing valve; the spring piece needs to have certain elasticity and can be smoothly put into the well. The spring piece is connected with the slurry replacing oil pipe through a pin.
The lower server is a tubular column 72 (shown as B-B' in fig. 7) with axial openings 71 around, the steel ball of the lower slurry replacing valve is pressed down, after the ball seat opening is opened, drilling fluid between the screen pipe and the casing pipe can pass through the lower slurry replacing valve and flow through the flow holes, and then enters the oil pipe through the openings of the lower server.
The upper server and the lower server on the drilling fluid (slurry-replacing) string are respectively corresponding to the upper slurry-replacing valve and the lower slurry-replacing valve on the sand-preventing completion string, namely when the lower server of the slurry-replacing string is inserted into the lower slurry-replacing valve of the sand-preventing completion string, when the ball seat opening of the lower slurry-replacing valve is opened, the overflow hole of the upper slurry-replacing valve is also opened.
Meanwhile, the compression distance of the upper pulp replacing valve spring is larger than (preferably 2 times) that of the lower pulp replacing valve spring, namely, the upper pulp replacing valve spring is compressed, the sliding sleeve moves downwards, and when the overflow holes of the upper pulp replacing valve are all opened, the lower server just contacts the steel balls of the lower pulp replacing valve. And continuing to lower the slurry replacing pipe column, and opening the ball seat opening of the lower slurry replacing valve.
When the slurry pipe column is lifted up, the lower server lifts the lower slurry replacing valve, the ball seat opening of the lower slurry replacing valve is closed, the overflow hole of the upper slurry replacing valve is still opened, the slurry pipe column is lifted up continuously, and the overflow hole of the upper slurry replacing valve is closed.
The specific embodiment is as follows:
(1) Putting a technical sleeve, well cementation and perforation;
(2) The lower slurry replacing valve, the sieve tube and the upper slurry replacing valve form an integral sieve tube which is hung on the sleeve by a hanger;
the lower slurry replacing valve is connected to the lowest part of the sieve tube, and the upper slurry replacing valve is connected to the lower part of the hanger.
(3) A slurry replacing pipe column is put in;
the upper server and the lower server correspond to the upper pulp replacing valve and the lower pulp replacing valve respectively, and the distance is set as follows: the upper pulp replacing valve spring is compressed, the sliding sleeve moves downwards, when the overflow holes of the upper pulp replacing valve are all opened, the lower server just contacts the steel balls of the lower pulp replacing valve, the pulp replacing pipe column is continuously lowered, and the ball seat opening of the lower pulp replacing valve is opened (shown in fig. 8). When the slurry pipe column is lifted up, the lower server lifts the lower slurry replacing valve, the ball seat opening of the lower slurry replacing valve is closed, the overflow hole of the upper slurry replacing valve is still opened, the slurry pipe column is lifted up continuously, and the overflow hole of the upper slurry replacing valve is closed.
(4) Drilling fluid in positive-displacement screen pipe
When the upper server approaches the upper slurry replacing valve, slurry in the sieve tube is replaced out of the ground according to the conventional operation.
The schematic diagram of the drilling fluid in the positive-displacement screen pipe is shown as a figure 3, clean water is pumped into the surface oil pipe, at the moment, the overflow hole of the upper-displacement slurry valve is closed, and the clean water passes through the upper-displacement slurry valve from the oil pipe downwards and continues downwards. The steel ball of the lower slurry replacing valve is pressed, the lower slurry replacing valve spring is compressed downwards, the steel ball moves downwards, clear water passes through the flow hole of the lower slurry replacing valve and enters the annulus between the screen pipe and the oil pipe, the drilling fluid continues to flow upwards, the drilling fluid is replaced out of the ground until the drilling fluid in the screen pipe is completely replaced out, and the liquid returned out of the ground is clear water.
(5) Space mud of reverse sieve tube and stratum ring
And continuing to lower the slurry replacing pipe column until the pipe column is lowered to the bottommost part, namely, the lower server is inserted into the lower slurry replacing valve, the ball seat opening of the lower slurry replacing valve is opened, at the moment, the upper server compresses the upper slurry replacing valve, and the overflow hole of the upper slurry replacing valve is opened.
Pumping clear water into an annulus between a ground oil pipe and a sleeve, enabling clear water to flow downwards through an oil sleeve annulus, enabling the clear water to flow through an overflow hole of an upper slurry replacing valve, enabling the clear water to enter the annulus between a screen pipe and the sleeve, driving drilling fluid in the annulus between the screen pipe and the sleeve to flow through the overflow hole of the lower slurry replacing valve, enabling the drilling fluid to enter the lower slurry replacing valve, enabling the drilling fluid to flow upwards into the lower server through a gap of the lower server due to the fact that the upper section of the lower slurry replacing valve is sealed with the lower server, namely enabling the drilling fluid to enter the slurry replacing oil pipe, enabling the drilling fluid to flow upwards continuously, and enabling the drilling fluid to flow out of the ground until the fluid which is in contact with the ground is completely clear water. As shown in fig. 3 b.
(6) Slurry for backwashing and flushing screen pipe filter layer
Because the sieve tube is soaked in the drilling fluid, the tiny solid particles of the drilling fluid can enter the sieve tube filter layer, and in order to avoid the sieve tube from being blocked and damaged, the tiny solid particles in the sieve tube filter layer need to be cleaned, as shown in a c of fig. 3.
And lifting the slurry replacing pipe column for a certain distance, so that the lower server is separated from the steel ball of the lower slurry replacing valve, namely the ball seat opening of the lower slurry replacing valve is closed, and the overflow hole of the upper slurry replacing valve is still opened.
Clean water is pumped into the annulus between the surface oil pipe and the casing, and flows downwards through the annulus of the oil sleeve, passes through the overflow hole of the upper slurry replacing valve and enters the annulus between the screen pipe and the casing. Because the lower server is separated from the lower pulp replacing valve, clean water cannot go upwards through the ball seat opening of the lower pulp replacing valve. Clear water enters the screen pipe through the screen pipe filter layer, washes the screen pipe filter layer, and then returns to the ground through the slurry replacing oil pipe until the liquid returned to the ground is clear water.
(7) And (5) after the slurry replacement is finished, lifting the slurry replacement pipe column to the ground, and finishing the construction.
Claims (25)
1. An out-pipe slurry-replaceable sand control device, wherein the device comprises a sleeve (1), a slurry-replaceable tubular column (2), a hanger (3), an upper slurry-replaceable valve (4), an upper server (5), a lower slurry-replaceable valve (6), a lower server (7) and a screen pipe (8); the upper slurry replacing valve (4) is connected to the upper part of the screen pipe (8), and the lower slurry replacing valve (6) is connected to the screen pipe (8) at a position close to the bottom; the upper slurry replacing valve (4), the lower slurry replacing valve (6) and the sieve tube (8) form an integral sieve tube (9), and the integral sieve tube (9) is arranged in the inner cavity of the sleeve (1) through the hanger (3); the slurry replacing pipe column (2) can pass through the upper slurry replacing valve (4) up and down in the sieve tube (8) and can be inserted into the lower slurry replacing valve (6); the lower server (7) is arranged at the bottom of the slurry replacing pipe column (2), and the upper server (5) is arranged on the outer wall of the slurry replacing pipe column (2); when the lower server (7) is inserted into the lower slurry replacing valve (6), the lower slurry replacing valve (6) is in an open state, so that the space between the sleeve (1) and the screen pipe (8) is communicated with the inner space of the screen pipe (8) through the lower slurry replacing valve (6); when the upper server (5) is in butt joint with the upper slurry replacing valve (4), the upper slurry replacing valve (4) is in an open state, so that a space between the slurry replacing pipe column (2) and the casing (1) is communicated with a space between the screen pipe (8) and the casing (1) through the upper slurry replacing valve (4); the distance between the upper server (5) and the lower server (7) is equivalent to the distance between the upper pulp replacing valve (4) and the lower pulp replacing valve (6), so that when the lower server (7) is inserted into the lower pulp replacing valve (6) and the lower pulp replacing valve is in an open state, the upper server (5) is in butt joint with the upper pulp replacing valve (4) to enable the upper pulp replacing valve to be in an open state;
the upper pulp replacing valve (4) comprises an upper pulp replacing valve outer pipe (41), a sliding sleeve (42) and an upper pulp replacing valve spring (43); the upper pulp replacing valve outer tube (41) is hollow and cylindrical, the top of the upper pulp replacing valve outer tube is provided with a first connecting device (411) of the upper pulp replacing valve, the bottom of the upper pulp replacing valve outer tube is provided with a second connecting device (412) of the upper pulp replacing valve, the side wall of the upper pulp replacing valve outer tube is provided with an upper pulp replacing valve overflow hole (413), the upper part of the inner wall of the upper pulp replacing valve outer tube is provided with a sliding sleeve limiting device (414), and the bottom of the upper pulp replacing valve outer tube is provided with a spring limiting device (415); the sliding sleeve (42) is slidably arranged in the inner cavity of the upper pulp replacing valve outer tube (41) and below the sliding sleeve limiting device (414), and the outer wall of the sliding sleeve (42) is attached to the inner wall of the upper pulp replacing valve outer tube (41); the upper slurry replacing valve spring (43) is arranged between the sliding sleeve (42) and the spring limiting device (415), and two ends of the upper slurry replacing valve spring (43) respectively lean against the lower surface of the side wall of the sliding sleeve (42) and the upper surface of the spring limiting device (415); when the sliding sleeve (42) slides upwards and abuts against the sliding sleeve limiting device (414), the sliding sleeve (42) seals the upper slurry replacing valve overflow hole (413), the upper slurry replacing valve (4) is in a closed state, when the sliding sleeve (42) compresses the upper slurry replacing valve spring (43) to slide downwards, the upper slurry replacing valve overflow hole (413) can be opened, a space between the slurry replacing pipe column (2) and the casing (1) is communicated with a space between the screen pipe (8) and the casing (1) through the upper slurry replacing valve overflow hole (413), and the upper slurry replacing valve (4) is in an open state.
2. The out-of-pipe slurry-replaceable sand control device of claim 1 wherein an inner wall of the upper slurry valve outer tube (41) is provided with an axially inwardly contracting step to form the slip sleeve stop (414).
3. The out-of-pipe slurry-replaceable sand control device according to claim 1, wherein a guide step (416) which is contracted inwards along the axial direction is arranged on the inner wall of the outer pipe (41) of the upper slurry-replacing valve, and the guide step (416) is positioned above the sliding sleeve limiting device (414).
4. The out-of-pipe slurry-replaceable sand control device of claim 1 wherein the upper slurry replacing valve (4) further comprises an upper slurry replacing valve upper joint (44) disposed on top of the upper slurry replacing valve (4); the top of the upper slurry replacing valve upper joint (44) is provided with an upper slurry replacing valve first connecting device (411), the bottom of the upper slurry replacing valve upper joint is provided with an upper slurry replacing valve third connecting device (441), and the upper slurry replacing valve upper joint (44) is connected with the top of the upper slurry replacing valve outer tube (41) through the upper slurry replacing valve third connecting device (441).
5. The out-of-pipe slurry-replaceable sand control device of claim 4 wherein the upper slurry valve (4) is positioned on top of the screen (8) and the integral screen (9) is connected to the hanger (3) by an upper slurry valve first connection means (411).
6. The out-of-pipe slurry-replaceable sand control device of claim 1 wherein the upper slurry replacing valve (4) further comprises an upper slurry replacing valve lower joint (45) disposed at the bottom of the upper slurry replacing valve (4), the upper slurry replacing valve lower joint (45) comprising a top upper slurry replacing valve fourth connecting means (451) and a bottom upper slurry replacing valve second connecting means (412), the upper slurry replacing valve lower joint (45) being connected to the bottom of the upper slurry replacing valve outer pipe (41) by the upper slurry replacing valve fourth connecting means (451) and to the screen (8) by the upper slurry replacing valve second connecting means (412).
7. The out-of-pipe slurry-replaceable sand control device of claim 6 wherein an upper portion of the upper slurry valve lower fitting (45) extends into an inner cavity of the upper slurry valve outer tube (41) and a stepped spring stop (415) is formed by a top upper surface of the upper slurry valve lower fitting (45).
8. The out-of-pipe slurry-replaceable sand control device of claim 4 wherein the upper slurry valve first connection means (411), the upper slurry valve second connection means (412), the upper slurry valve third connection means (441) and the upper slurry valve fourth connection means (451) are all threaded.
9. The out-of-pipe slurry-replaceable sand control device of claim 1, wherein the lower slurry replacing valve (6) comprises a lower slurry replacing valve outer pipe (61), an inner pipe (62), a steel ball (63), a lower slurry replacing valve spring (64) and an overflow valve (65); the lower pulp replacing valve outer tube (61) is hollow and cylindrical, the top of the hollow and the bottom of the hollow and cylindrical is closed, the inner tube (62) is arranged in the inner cavity of the lower pulp replacing valve outer tube (61) and is fixedly connected with the inner wall of the lower pulp replacing valve outer tube (61) through the upper part of the inner tube (62), and the outer wall of the lower part of the inner tube (62) is contracted inwards along the axial direction, so that a liquid flow channel (66) is formed between the outer wall of the lower part of the inner tube and the inner wall of the lower pulp replacing valve outer tube (61); the side wall of the lower part of the lower pulp replacing valve outer pipe (61) is provided with a lower pulp replacing valve overflow hole (611), and the inner space and the outer space of the lower pulp replacing valve outer pipe (61) are communicated through the lower pulp replacing valve overflow hole (611); the inner tube (62) is hollow and cylindrical, the top of the inner tube is open, an annular overflow valve (65) with a hole in the middle is arranged at the bottom of the inner tube, and the liquid flow passage is communicated with the inner cavity of the inner tube (62) through the hole in the middle of the overflow valve (65); the lower pulp replacing valve spring (64) is arranged in the inner cavity of the inner pipe (62), the lower end of the lower pulp replacing valve spring is abutted against the annular upper surface of the overflow valve (65), and the upper end of the lower pulp replacing valve spring is abutted against the bottom of the steel ball (63); the inner wall of the middle part of the inner tube (62) is provided with a step which expands outwards along the axial direction to form a downward ball seat (621), and the top of the steel ball (63) is abutted upwards against the lower edge of the ball seat (621) so as to prevent the steel ball from moving upwards at the ball seat.
10. The out-of-pipe slurry-replaceable sand control device according to claim 9, wherein an upper inner wall of the inner pipe (62) is provided with a slope (622) that gradually tapers axially inward from the top so as to move downward past the slope when the lower server (7) is inserted into the lower slurry-replacing valve (6).
11. The out-of-pipe slurry-replaceable sand control device of claim 9 wherein the lower slurry valve (6) further comprises a lower slurry valve upper joint (67) disposed at a top of the lower slurry valve; the top of the upper joint (67) of the lower pulp replacing valve is provided with a first connecting device (671) of the lower pulp replacing valve, the bottom of the upper joint is provided with a second connecting device (672) of the lower pulp replacing valve, and the upper joint (67) of the lower pulp replacing valve is connected with the top of the outer tube (61) of the lower pulp replacing valve through the second connecting device (672) of the lower pulp replacing valve.
12. The out-of-pipe slurry-replaceable sand control device according to claim 11, wherein the lower slurry replacing valve (6) further comprises a lower slurry replacing valve plug (68) arranged at the bottom of a lower slurry replacing valve outer pipe (61), the lower slurry replacing valve outer pipe (61) is hollow cylindrical with both top and bottom open, and the bottom of the lower slurry replacing valve outer pipe (61) is closed by the lower slurry replacing valve plug (68); the upper part of the lower pulp replacing valve plug (68) is provided with a lower pulp replacing valve third connecting device (681), and the lower pulp replacing valve plug (68) is fixedly connected with the lower pulp replacing valve outer tube (61) through the lower pulp replacing valve third connecting device (681).
13. The out-of-pipe slurry-replaceable sand control device of claim 11 or 12 wherein the lower slurry valve first connection (671), the lower slurry valve second connection (672) and the lower slurry valve third connection (681) are all threaded.
14. The out-of-pipe slurry-replaceable sand control device according to any one of claims 9 to 12, wherein a compression distance of the lower slurry-replacing valve spring (64) is greater than a compression distance of the upper slurry-replacing valve spring (43).
15. The out-of-pipe slurry-replaceable sand control device of claim 14 wherein the compression distance of the lower slurry valve spring (64) is 2 times the compression distance of the upper slurry valve spring (43).
16. The out-of-pipe slurry-replaceable sand control device according to any one of claims 1 to 12, wherein the upper server (5) comprises at least one spring piece (51) circumferentially arranged on the outer wall of the slurry-replacing pipe column (2) along the slurry-replacing pipe column (2), the height of the spring piece (51) protruding from the outer wall of the slurry-replacing pipe column (2), and the strength and elasticity of the spring piece (51) enable the spring piece (51) to penetrate through the upper slurry-replacing valve outer pipe (41) and push the sliding sleeve (42) downwards when the slurry-replacing pipe column (2) runs downwards.
17. The out-of-pipe slurry-replaceable sand control device according to claim 16, wherein the number of the spring pieces (51) is 4, and the spring pieces are uniformly arranged on the outer wall of the slurry-replacing pipe column along the circumferential direction of the slurry-replacing pipe column (2).
18. The out-of-pipe slurry-replaceable sand control device according to claim 16, wherein the spring piece (51) is fixed on the outer wall of the slurry-replacing pipe column (2) through a pin (52) arranged at the bottom of the spring piece.
19. The out-of-pipe slurry-replaceable sand control device of claim 16 wherein a spring plate blocking device (53) is provided at a corresponding location on top of each spring plate (51) on the outer wall of the slurry-replacing pipe column (2).
20. The out-of-pipe slurry-replaceable sand control device of claim 19 wherein the spring plate blocking device (53) is a spring plate blocking ring circumferentially disposed about the slurry-replacing pipe string (2).
21. The out-of-pipe slurry-replaceable sand control device of claim 16 wherein the lower server (7) comprises a lower server string (72) with at least one through hole (71) disposed at the bottom of the slurry replacing string (2), the outer diameter of the lower server string (72) matching the inner diameter of the inner tube (62) of the lower slurry replacing valve (6).
22. The out-of-pipe slurry-replaceable sand control device of claim 21 wherein the through hole (71) is a gap open from the top of the lower server string (72) along the lower server (7) string axis.
23. The out-of-pipe slurry-replaceable sand control device of claim 22 wherein the number of through holes (71) is four and evenly distributed circumferentially along a lower server string (72).
24. The out-of-pipe slurry-replaceable sand control device of claim 1 wherein the tubular string further comprises a screen plug (10) disposed at a bottom of the screen (8).
25. A method of well casing slurry using the out-of-pipe slurry capable sand control device of any one of claims 1 to 24 wherein said method comprises the steps of:
(1) The integral screen pipe (9) is put into the casing (1), and the integral screen pipe (9) is fixed in the inner cavity of the casing (1) through the hanger (3);
(2) A slurry replacing pipe column (2) is put in, and when an upper server (5) approaches an upper slurry replacing valve (4), slurry in a screen pipe (8) is replaced out of the ground;
(3) Continuing to lower the slurry replacing pipe column (2), wherein the upper server (5) and the lower server (7) respectively correspond to the upper slurry replacing valve (4) and the lower slurry replacing valve (6), and the distance is set as follows: the upper pulp replacing valve spring (43) is compressed, the sliding sleeve (42) moves downwards, when the upper pulp replacing valve overflow hole (413) is fully opened, the lower server (7) just contacts the steel ball (63) of the lower pulp replacing valve (6), the pulp replacing pipe column (2) is continuously lowered, and the lower pulp replacing valve (6) pushes against the steel ball (63) to move downwards so that the ball seat (621) is opened; pumping clear water into an annulus between the ground oil pipe and the sleeve (1) to displace slurry out of the ground;
(4) Lifting the slurry replacing pipe column (2), lifting the lower server (7) from the lower slurry replacing valve (6), enabling the steel ball (63) to be propped against the ball seat (621) again to enable the ball seat to be closed, enabling the upper slurry replacing valve overflow hole (413) to be still in an open state, continuing lifting the slurry replacing pipe column (2), and enabling the upper slurry replacing valve overflow hole (413) to be closed; pumping clear water into an annulus between the ground oil pipe and the sleeve (1), flushing a filter layer of the screen pipe (8), and returning the clear water to the ground through the slurry replacing oil pipe until the liquid returned to the ground is clear water;
(5) And (5) after the slurry replacement is finished, lifting the slurry replacement pipe column (2) to the ground, and finishing the construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821582.2A CN112443285B (en) | 2019-09-02 | 2019-09-02 | Sand control device capable of replacing slurry outside pipe and slurry replacing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821582.2A CN112443285B (en) | 2019-09-02 | 2019-09-02 | Sand control device capable of replacing slurry outside pipe and slurry replacing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112443285A CN112443285A (en) | 2021-03-05 |
| CN112443285B true CN112443285B (en) | 2023-04-25 |
Family
ID=74733884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910821582.2A Active CN112443285B (en) | 2019-09-02 | 2019-09-02 | Sand control device capable of replacing slurry outside pipe and slurry replacing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112443285B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089360A (en) * | 2007-07-12 | 2007-12-19 | 西南石油大学 | Well completion method and device of diverticulum with outer packer combined with sieve tube |
| CN101250984A (en) * | 2007-11-14 | 2008-08-27 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Well-washing sand prevention integrated technique tubular pile |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1014084B (en) * | 1986-08-25 | 1991-09-25 | 马斯科工业公司 | Method and apparatus for multi-stage cementing of well casing |
| CN2632307Y (en) * | 2003-06-27 | 2004-08-11 | 中国石油天然气股份有限公司 | Internal-pipe well cementing sealer |
| CN2883664Y (en) * | 2006-04-12 | 2007-03-28 | 新疆石油管理局钻井工艺研究院 | Inner-tube floating hook |
| CN201306152Y (en) * | 2008-12-03 | 2009-09-09 | 中国石化股份胜利油田分公司胜利采油厂 | Pressure-balancing pressure-testing valve |
| CN101498205B (en) * | 2009-02-25 | 2011-12-14 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Horizontal well washing valve blocking apparatus |
| CN101718190B (en) * | 2009-12-08 | 2012-10-24 | 安东石油技术（集团）有限公司 | Completed well body structure with temporary plugging function screen pipe and well completion method for suspending screen pipe at tail pipe |
| CN101871334B (en) * | 2010-06-01 | 2013-04-10 | 中国石油化工股份有限公司 | Blocking technological method of drillable oil layer |
| WO2014074093A1 (en) * | 2012-11-07 | 2014-05-15 | Halliburton Energy Services, Inc. | Time delay well flow control |
| CN103821471B (en) * | 2014-02-20 | 2016-08-17 | 中国石油化工股份有限公司 | The processing method of the outer cement sheath of cementing completion ethmoid canal,posterior |
| CN204113214U (en) * | 2014-09-10 | 2015-01-21 | 中国石油天然气股份有限公司 | A kind of oil jacket coupling cock valve |
| CN104832119A (en) * | 2015-03-12 | 2015-08-12 | 北京一龙恒业石油工程技术有限公司 | Window opening and sidetrack drilling short-radius horizontal well and reverse circulation well cementing and water plugging method |
| CN205977173U (en) * | 2016-08-26 | 2017-02-22 | 中国石油化工股份有限公司 | A inflation formula cement injection device for screen pipe crest water flooding bricklayer skill |
| CN108240193B (en) * | 2016-12-23 | 2021-01-29 | 中国石油天然气股份有限公司 | Coal bed gas horizontal well unfreezing tubular column and method |
| CN106593349B (en) * | 2016-12-28 | 2019-05-07 | 中国石油天然气股份有限公司 | A kind of rod-pumped well productive completion tubing string of back-washable de-plugging sand control |
| CN108119091B (en) * | 2017-09-08 | 2020-08-11 | 中国石油天然气股份有限公司 | Well cementation and completion pipe string and method |
| CN207905771U (en) * | 2018-02-07 | 2018-09-25 | 中国石油集团西部钻探工程有限公司 | From grouting floating hoop |
| CN208280910U (en) * | 2018-05-22 | 2018-12-25 | 中国石油化工股份有限公司 | Naked eye sieve tube completion horizontal well is for the outer mud of pipe and acidification integral process tubing string |
| CN208416490U (en) * | 2018-07-08 | 2019-01-22 | 卜震山 | Fraclional well cementing well repairing device |
| CN211081763U (en) * | 2019-10-21 | 2020-07-24 | 天津圣朗迪石油科技有限公司 | Well-flushing pollution prevention device |
-
2019
- 2019-09-02 CN CN201910821582.2A patent/CN112443285B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089360A (en) * | 2007-07-12 | 2007-12-19 | 西南石油大学 | Well completion method and device of diverticulum with outer packer combined with sieve tube |
| CN101250984A (en) * | 2007-11-14 | 2008-08-27 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Well-washing sand prevention integrated technique tubular pile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112443285A (en) | 2021-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8657004B2 (en) | Sliding stage cementing tool | |
| US8720561B2 (en) | Sliding stage cementing tool and method | |
| US4700777A (en) | Gravel packing apparatus and method | |
| CN108386160B (en) | Blockage removal type sand prevention pipe column structure capable of flushing lower sieve pipe of pump | |
| CN216974789U (en) | Packer for dragging bottom seal of continuous oil pipe | |
| CN107893644B (en) | Underground hydraulic control device | |
| CN106321010B (en) | Integrated packer | |
| CN103422846B (en) | The fracturing integrated tubing string of open-hole horizontal well completion | |
| CN203420698U (en) | Well completion fracture integrated pipe column for open hole horizontal well | |
| CN108798615B (en) | Separate injection well completion pipe string of water injection well and snubbing well completion process | |
| CN112443285B (en) | Sand control device capable of replacing slurry outside pipe and slurry replacing method | |
| CN106321035B (en) | Full well bore is prevented returning and is told layering water injection tubular column | |
| CN109441399B (en) | Bridge plug capable of flushing sand | |
| CN108204226B (en) | sand prevention tubular column | |
| CN115434665B (en) | Shaft switching tool free of well killing and underground operation and process method | |
| CN112343540A (en) | Packing type staged cementing device, well cementation pipe column and well cementation method | |
| CN110847846B (en) | Packer for oil field exploitation | |
| CN114508326A (en) | Sand control well completion integration packing and filling instrument | |
| CN210068069U (en) | Anti-leakage double-sealing well-flushing packer | |
| CN115853471A (en) | Horizontal well blocking, filling and commingling production process pipe column and method | |
| CN203420699U (en) | Diameter-reducing sliding sleeve | |
| CN114482958A (en) | Casing cementing full-bore infinite staged fracturing well completion device and fracturing well completion method thereof | |
| CN113530512B (en) | Fracturing string and fracturing method | |
| CN111706304A (en) | Filling tool with reverse circulation function | |
| US7694732B2 (en) | Diverter tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |