CA3080647C - Tubular column for drill-free and catch-free integrated well cementing and well completion and application thereof - Google Patents
Tubular column for drill-free and catch-free integrated well cementing and well completion and application thereof Download PDFInfo
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- CA3080647C CA3080647C CA3080647A CA3080647A CA3080647C CA 3080647 C CA3080647 C CA 3080647C CA 3080647 A CA3080647 A CA 3080647A CA 3080647 A CA3080647 A CA 3080647A CA 3080647 C CA3080647 C CA 3080647C
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- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- 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
- E21B33/122—Multiple string packers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Piles And Underground Anchors (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Disclosed is a tubular column for drill-free and catch-free integrated well cementing and well completion, the tubular column comprising a casing tubular column, and a setting tool string tubular column mounted in the casing tubular column and having a lower section thereof closed. The casing tubular column comprises an on/off-type cementing device (6), an external packer (8) and an inner seal short joint (9) connected in sequence from top to bottom, wherein the external packer is provided with a pressure transmitting hole. The setting tool string tubular column comprises an outer seal short joint (5), a bumping base (7) and an inner sealing device (11) connected in sequence from top to bottom, wherein the outer seal short joint is provided with an overflowing hole (17), the overflowing hole is located between the on/off-type cementing device and the inner seal short joint, the on/off-type cementing device and the outer seal short joint are sealed relative to each other, the inner seal short joint and the inner sealing device are sealed relative to each other, and an anchoring mechanism for releasing a grip is provided between the on/off-type cementing device and the outer seal short joint. Moreover, a method of drill-free and catch-free integrated well cementing and well completion is disclosed.
Description
Tubular Column for Drill-Free and Catch-Free Integrated Well Cementing and Well Completion and Application thereof Technical Field The present application relates to, but is not limited to, the field of filling equipment, especially a tubular string for drilling-free and fishing-free integrated well cementing and well completion.
Background In general, the well cementing operation and the well completion operation in the offshore oilfields are different operation processes which have problems, such as long operating period, complicated casing procedure. Currently drilling-free integrated well cementing and well completion process is used in onshore.
The flow of the drilling-free integrated well cementing and well completion process used in onshore is as follows.
1. The string consists of a guide shoe, a screen pipe, a drilling-free tool, and a casing.
Background In general, the well cementing operation and the well completion operation in the offshore oilfields are different operation processes which have problems, such as long operating period, complicated casing procedure. Currently drilling-free integrated well cementing and well completion process is used in onshore.
The flow of the drilling-free integrated well cementing and well completion process used in onshore is as follows.
1. The string consists of a guide shoe, a screen pipe, a drilling-free tool, and a casing.
2. After the string was positioned in place, the wellhead is pressurized;
first the outer packer of the drilling-free tool is expanded and set, and the annular is sealed; the wellhead continues to be pressurized, the staged cement injector of the drilling-free tool is opened and the circulation is established; well cementing is carried out in normal procedure.
Then a cementing plug is put until the bumping-the-plug occurs. The well cementing is accomplished.
first the outer packer of the drilling-free tool is expanded and set, and the annular is sealed; the wellhead continues to be pressurized, the staged cement injector of the drilling-free tool is opened and the circulation is established; well cementing is carried out in normal procedure.
Then a cementing plug is put until the bumping-the-plug occurs. The well cementing is accomplished.
3. After the Wait On Cement (WOC) is completed, a slim drill-rod with a fishing tool is put to fish internal components of the drilling-free tool, and the entire well is milled. Then the well completion operation is accomplished.
Summary The following is an overview of the subject matters described in detail herein. This summary is not intended to limit the protection scope of the claims.
Date Recue/Date Received 2020-04-28 The inventors of this application have found that the current drilling-free integrated well cementing and well completion process has the following hidden dangers and deficiencies.
1. The drilling-free tool requires that the cement is injected into the casing and the cementing plug replaces the cement. However, the cement may not be completely replaced by the cementing plug and there may be residual cement on the inner wall of the casing.
2. In the process the circulation hole of the cement injector is opened by hydraulic pressure and the circulation hole of the cement injector is closed after the bumping-the-plug occurs. In actual operation, inadequate closing of the circulation hole may easily occur, affecting the cementing quality.
3. After cementing, it is necessary to use a fishing tool to fish internal components of the drilling-free tool which are difficult to retrieve.
After a lot of researches, the inventors of this application provide a tubular string for drilling-free and fishing-free integrated well cementing and well completion, which solves problems such as inadequate closing of the circulation hole and difficult retrieving of the cementing plug. After the setting tool string is installed in place, the outer packer is set. The setting tool string is pressed down, and the on/off type cement injector is opened. The cement is injected into the drill-rod and the cementing plug is put in for replacement.
The setting tool string is lifted in order to close the on/off type cement injector, and the cementing plug is retrieved. The whole operation process is carried out continuously, avoiding waiting on cement.
Therefore, the present application provides a tubular string for drilling-free and fishing-free integrated well cementing and well completion comprising a casing string and a setting tool string that is installed in the casing string and closed at a lower section. The casing string comprises an on/off type cement injector, an outer packer and an inner sealing nipple which are connected sequentially from top to bottom. The outer packer is provided with a pressure transmitting hole. The setting tool string comprises an outer sealing nipple, a landing collar and an inner seal which are connected sequentially from top to bottom.
The outer sealing nipple is provided with an over-flow hole located between the on/off type cement injector and the inner sealing nipple. The on/off type cement injector is sealed to the outer sealing nipple, the inner sealing nipple is sealed to the inner seal. An anchoring mechanism for separating is Date Recue/Date Received 2020-04-28 provided between the on/off type cement injector and the outer sealing nipple.
In an exemplary embodiment of the present application, the setting tool string may further comprise a drill-rod located above the outer sealing nipple, the lower end of the drill-rod being connected to the upper end of the outer sealing nipple.
In an exemplary embodiment of the present application, the setting tool string may further comprise an inner guide shoe with a closed lower end, the inner guide shoe being located below the inner seal, the upper end of the inner guide shoe being connected to the lower end of the inner seal.
In an exemplary embodiment of the present application, the setting tool string may further comprise a cementing plug capable of being put into the outer sealing nipple so as to be sealed to the landing collar.
In an exemplary embodiment of the present application, the casing string may further comprise a screen pipe located below the inner sealing nipple, the upper end of the screen pipe being connected to the lower end of the inner sealing nipple.
In an exemplary embodiment of the present application, the casing string may further comprise an outer guide shoe with an opened lower end, the outer guide shoe being located below the screen pipe, the upper end of the outer guide shoe being connected to the lower end of the screen pipe.
In an exemplary embodiment of the present application, the casing string may further comprise a generating casing located above the on/off type cement injector, the lower end of the generating casing being connected to the upper end of the on/off type cement injector.
In an exemplary embodiment of the present application, the on/off type cement injector may be a mechanical on/off type cement injector.
In an exemplary embodiment of the present application, the mechanical on/off type cement injector may comprise an inner cylinder provided with a first through hole, and an outer cylinder, the lower end of which being connected to the outer packer, the outer cylinder being provided with a second through hole. The inner cylinder is configured to be installed in the outer cylinder in such a way that the inner cylinder is movable upwardly and downwardly Date Recue/Date Received 2020-04-28 therein. When the mechanical on/off type cement injector is in a closed state, the first through hole is located above the second through hole and the side wall of the inner cylinder covers the second through hole. When the mechanical on/off type cement injector is in an opened state, the inner cylinder is moved downward relative to the outer cylinder so that the first through hole and the second through hole are communicated with each other.
In an exemplary embodiment of the present application, the anchoring mechanism may comprise a thread provided on the outer sealing nipple and a barb provided on the on/off type cement injector.
The present application provides a method for drilling-free and fishing-free integrated well cementing and well completion, which includes using the tubular string for drilling-free and fishing-free integrated well cementing and well completion according to any one of the embodiments of the invention, the method comprising the following steps:
at the wellhead, first tripping-in the casing string and then tripping-in the setting tool string;
pressurizing and setting the outer packer;
pressing the setting tool string, opening the on/off type cement injector and injecting designed amount of cement;
putting the cementing plug into the setting tool string, injecting the cement into the interior of the casing string and the interior of the well through the on/off type cement injector, and bringing the cementing plug into contact with the landing collar to realize the bumping-the-plug; and lifting the setting tool string to close the on/off type cement injector by means of the anchoring mechanism, realizing the separation between the casing string and the setting tool string, waiting on cement, and accomplishing the integrated well cementing and well completion.
In an exemplary embodiment of the present application, the step of pressurizing and setting the outer packer may comprise: after a sealed space formed by the sealing between the outer sealing nipple and the on/off type cement injector and the sealing between the inner seal
Summary The following is an overview of the subject matters described in detail herein. This summary is not intended to limit the protection scope of the claims.
Date Recue/Date Received 2020-04-28 The inventors of this application have found that the current drilling-free integrated well cementing and well completion process has the following hidden dangers and deficiencies.
1. The drilling-free tool requires that the cement is injected into the casing and the cementing plug replaces the cement. However, the cement may not be completely replaced by the cementing plug and there may be residual cement on the inner wall of the casing.
2. In the process the circulation hole of the cement injector is opened by hydraulic pressure and the circulation hole of the cement injector is closed after the bumping-the-plug occurs. In actual operation, inadequate closing of the circulation hole may easily occur, affecting the cementing quality.
3. After cementing, it is necessary to use a fishing tool to fish internal components of the drilling-free tool which are difficult to retrieve.
After a lot of researches, the inventors of this application provide a tubular string for drilling-free and fishing-free integrated well cementing and well completion, which solves problems such as inadequate closing of the circulation hole and difficult retrieving of the cementing plug. After the setting tool string is installed in place, the outer packer is set. The setting tool string is pressed down, and the on/off type cement injector is opened. The cement is injected into the drill-rod and the cementing plug is put in for replacement.
The setting tool string is lifted in order to close the on/off type cement injector, and the cementing plug is retrieved. The whole operation process is carried out continuously, avoiding waiting on cement.
Therefore, the present application provides a tubular string for drilling-free and fishing-free integrated well cementing and well completion comprising a casing string and a setting tool string that is installed in the casing string and closed at a lower section. The casing string comprises an on/off type cement injector, an outer packer and an inner sealing nipple which are connected sequentially from top to bottom. The outer packer is provided with a pressure transmitting hole. The setting tool string comprises an outer sealing nipple, a landing collar and an inner seal which are connected sequentially from top to bottom.
The outer sealing nipple is provided with an over-flow hole located between the on/off type cement injector and the inner sealing nipple. The on/off type cement injector is sealed to the outer sealing nipple, the inner sealing nipple is sealed to the inner seal. An anchoring mechanism for separating is Date Recue/Date Received 2020-04-28 provided between the on/off type cement injector and the outer sealing nipple.
In an exemplary embodiment of the present application, the setting tool string may further comprise a drill-rod located above the outer sealing nipple, the lower end of the drill-rod being connected to the upper end of the outer sealing nipple.
In an exemplary embodiment of the present application, the setting tool string may further comprise an inner guide shoe with a closed lower end, the inner guide shoe being located below the inner seal, the upper end of the inner guide shoe being connected to the lower end of the inner seal.
In an exemplary embodiment of the present application, the setting tool string may further comprise a cementing plug capable of being put into the outer sealing nipple so as to be sealed to the landing collar.
In an exemplary embodiment of the present application, the casing string may further comprise a screen pipe located below the inner sealing nipple, the upper end of the screen pipe being connected to the lower end of the inner sealing nipple.
In an exemplary embodiment of the present application, the casing string may further comprise an outer guide shoe with an opened lower end, the outer guide shoe being located below the screen pipe, the upper end of the outer guide shoe being connected to the lower end of the screen pipe.
In an exemplary embodiment of the present application, the casing string may further comprise a generating casing located above the on/off type cement injector, the lower end of the generating casing being connected to the upper end of the on/off type cement injector.
In an exemplary embodiment of the present application, the on/off type cement injector may be a mechanical on/off type cement injector.
In an exemplary embodiment of the present application, the mechanical on/off type cement injector may comprise an inner cylinder provided with a first through hole, and an outer cylinder, the lower end of which being connected to the outer packer, the outer cylinder being provided with a second through hole. The inner cylinder is configured to be installed in the outer cylinder in such a way that the inner cylinder is movable upwardly and downwardly Date Recue/Date Received 2020-04-28 therein. When the mechanical on/off type cement injector is in a closed state, the first through hole is located above the second through hole and the side wall of the inner cylinder covers the second through hole. When the mechanical on/off type cement injector is in an opened state, the inner cylinder is moved downward relative to the outer cylinder so that the first through hole and the second through hole are communicated with each other.
In an exemplary embodiment of the present application, the anchoring mechanism may comprise a thread provided on the outer sealing nipple and a barb provided on the on/off type cement injector.
The present application provides a method for drilling-free and fishing-free integrated well cementing and well completion, which includes using the tubular string for drilling-free and fishing-free integrated well cementing and well completion according to any one of the embodiments of the invention, the method comprising the following steps:
at the wellhead, first tripping-in the casing string and then tripping-in the setting tool string;
pressurizing and setting the outer packer;
pressing the setting tool string, opening the on/off type cement injector and injecting designed amount of cement;
putting the cementing plug into the setting tool string, injecting the cement into the interior of the casing string and the interior of the well through the on/off type cement injector, and bringing the cementing plug into contact with the landing collar to realize the bumping-the-plug; and lifting the setting tool string to close the on/off type cement injector by means of the anchoring mechanism, realizing the separation between the casing string and the setting tool string, waiting on cement, and accomplishing the integrated well cementing and well completion.
In an exemplary embodiment of the present application, the step of pressurizing and setting the outer packer may comprise: after a sealed space formed by the sealing between the outer sealing nipple and the on/off type cement injector and the sealing between the inner seal
4 Date Recue/Date Received 2020-04-28 and the inner sealing nipple is communicated with a pressure transmitting hole of the outer packer in the tripped-in casing string and setting tool string, a pressure is pumped to the setting tool string, the pressure is delivered through the pressure transmitting hole and multiple sets of shear pins on the outer packer are sheared off, to achieve the setting of the outer packer.
In an exemplary embodiment of the present application, the step of opening the on/off type cement injector may comprise: after pressing the setting tool string down to a certain tonnage, shearing off the shear pins of the on/off type cement injector, and moving the inner cylinder of the on/off type cement injector downward to communicate the first through hole of the inner cylinder of the on/off type cement injector with the second through hole of the outer cylinder of the on/off type cement injector, in order to achieve communication between the inside of the casing string and the well.
In an exemplary embodiment of the present application, the step of injecting the cement into the interior of the casing string and the interior of the well through the on/off type cement injector may comprise: after putting the cementing plug into the setting tool string, injecting a replacement fluid which replaces the cementing plug, so that the cement is injected into the interior of the casing string and the interior of the well through the on/off type cement injector.
In an exemplary embodiment of the present application, the step of closing the on/off type cement injector by means of the anchoring mechanism may comprise: after the setting tool string is lifted, the inner cylinder of the on/off type cement injector is moved upward by the anchoring mechanism so as to disconnect the first through hole of the inner cylinder of the on/off type cement injector and the second through hole of the outer cylinder of the on/off type cement injector, thereby closing the on/off type cement injector.
The embodiments of the present invention provide a tubular string for drilling-free and fishing-free integrated well cementing and well completion and the application thereof, which solve problems such as inadequate closing of the circulation hole and difficult retrieving of the cementing plug. After the setting tool string is installed in place, the outer packer is set. The setting tool string is pressed down, and the on/off type cement injector is opened. The cement is injected into the drill-rod and the cementing plug is put in for replacement.
The setting tool string is lifted in order to close the on/off type cement injector, and the cementing plug is
In an exemplary embodiment of the present application, the step of opening the on/off type cement injector may comprise: after pressing the setting tool string down to a certain tonnage, shearing off the shear pins of the on/off type cement injector, and moving the inner cylinder of the on/off type cement injector downward to communicate the first through hole of the inner cylinder of the on/off type cement injector with the second through hole of the outer cylinder of the on/off type cement injector, in order to achieve communication between the inside of the casing string and the well.
In an exemplary embodiment of the present application, the step of injecting the cement into the interior of the casing string and the interior of the well through the on/off type cement injector may comprise: after putting the cementing plug into the setting tool string, injecting a replacement fluid which replaces the cementing plug, so that the cement is injected into the interior of the casing string and the interior of the well through the on/off type cement injector.
In an exemplary embodiment of the present application, the step of closing the on/off type cement injector by means of the anchoring mechanism may comprise: after the setting tool string is lifted, the inner cylinder of the on/off type cement injector is moved upward by the anchoring mechanism so as to disconnect the first through hole of the inner cylinder of the on/off type cement injector and the second through hole of the outer cylinder of the on/off type cement injector, thereby closing the on/off type cement injector.
The embodiments of the present invention provide a tubular string for drilling-free and fishing-free integrated well cementing and well completion and the application thereof, which solve problems such as inadequate closing of the circulation hole and difficult retrieving of the cementing plug. After the setting tool string is installed in place, the outer packer is set. The setting tool string is pressed down, and the on/off type cement injector is opened. The cement is injected into the drill-rod and the cementing plug is put in for replacement.
The setting tool string is lifted in order to close the on/off type cement injector, and the cementing plug is
5 Date Recue/Date Received 2020-04-28 retrieved. The whole operation process is carried out continuously, avoiding waiting on cement.
Other features and advantages of this application will be explained in the following description, and in part will become clear from the description, or be understood by implementing this application. The objects and other advantages of the present application can be achieved and obtained by the structures particularly described in the description, the claims, and the drawings.
Brief Description of Drawings The drawings are used to provide a further understanding of the technical schemes herein, .. which constitute a part of the description and together with the embodiments of the present application are used to explain the technical schemes of the present application, and do not constitute a limitation on the technical schemes herein.
FIG. 1 to FIG. 5 are cross-sectional structural schematic diagrams of different working states of the tubular string for drilling-free and fishing-free integrated well cementing and well completion according to an embodiment of the present application.
The correspondence between the reference numerals and component names in FIG.
1 to FIG. 5 is as follows:
1 formation, 2 outer casing, 3 outer cement, 4 generating casing, 5 outer sealing nipple, 6 mechanical on/off type cement injector, 7 landing collar, 8 outer packer, 9 inner sealing nipple, 10 drill-rod, 11 inner seal, 12 inner guide shoe, 13 outer guide shoe, 14 screen pipe, 15 cementing plug, 16 oil pipe, 17 over-flow hole, 18 first through hole, 19 second through hole.
Detailed Description In order to make the purposes and technical schemes as well as advantages of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, as long as there is no confliction, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.
Other features and advantages of this application will be explained in the following description, and in part will become clear from the description, or be understood by implementing this application. The objects and other advantages of the present application can be achieved and obtained by the structures particularly described in the description, the claims, and the drawings.
Brief Description of Drawings The drawings are used to provide a further understanding of the technical schemes herein, .. which constitute a part of the description and together with the embodiments of the present application are used to explain the technical schemes of the present application, and do not constitute a limitation on the technical schemes herein.
FIG. 1 to FIG. 5 are cross-sectional structural schematic diagrams of different working states of the tubular string for drilling-free and fishing-free integrated well cementing and well completion according to an embodiment of the present application.
The correspondence between the reference numerals and component names in FIG.
1 to FIG. 5 is as follows:
1 formation, 2 outer casing, 3 outer cement, 4 generating casing, 5 outer sealing nipple, 6 mechanical on/off type cement injector, 7 landing collar, 8 outer packer, 9 inner sealing nipple, 10 drill-rod, 11 inner seal, 12 inner guide shoe, 13 outer guide shoe, 14 screen pipe, 15 cementing plug, 16 oil pipe, 17 over-flow hole, 18 first through hole, 19 second through hole.
Detailed Description In order to make the purposes and technical schemes as well as advantages of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, as long as there is no confliction, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.
6 Date Recue/Date Received 2020-04-28 In the following description, many specific details are set forth in order to fully understand this application. However, this application can also be implemented in other ways than those described herein. Therefore, the protection scope of this application is not limited by the specific embodiments disclosed below.
In the following, a tubular string for drilling-free and fishing-free integrated well cementing and well completion according to some embodiments of the present application is described with reference to the accompanying drawings.
The tubular string for drilling-free and fishing-free integrated well cementing and well completion provided in the present application, as shown in FIG. 1 to FIG. 5, includes a casing string, and a setting tool string that is installed in the casing string and closed at the lower section. The casing string includes an on/off type cement injector, an outer packer 8, and an inner sealing nipple 9 which are connected sequentially from top to bottom.
The outer packer 8 is provided with a pressure transmitting hole. The setting tool string includes an outer sealing nipple 5, a landing collar 7 and an inner seal 11 which are connected sequentially from top to bottom. The outer sealing nipple 5 is provided with an over-flow hole 17. The over-flow hole 17 is located between the on/off type cement injector and the inner sealing nipple 9. The on/off type cement injector is sealed to the outer sealing nipple 5. The inner sealing nipple 9 is sealed to the inner seal 11. An anchoring mechanism for separating is provided between the on/off type cement injector and the outer sealing nipple 5.
The tubular string for drilling-free and fishing-free integrated well cementing and well completion provided by the present application solves the problems such as inadequate closing of the circulation hole and difficult retrieving of the cementing plug 15.
After the setting tool string is installed in place, the outer packer 8 is set. The setting tool string is pressed down, and then the on/off type cement injector is opened. The drill-rod 10 is filled with cement and the cementing plug 15 is put in for replacement. The setting tool string is lifted to close the on/off type cement injector, and the cementing plug 15 is retrieved. The entire construction process is performed continuously, avoiding waiting on cement.
Specifically, the setting tool string further includes: a drill-rod 10 located above the outer sealing nipple 5, the lower end of drill-rod 10 being connected to the upper end of the outer
In the following, a tubular string for drilling-free and fishing-free integrated well cementing and well completion according to some embodiments of the present application is described with reference to the accompanying drawings.
The tubular string for drilling-free and fishing-free integrated well cementing and well completion provided in the present application, as shown in FIG. 1 to FIG. 5, includes a casing string, and a setting tool string that is installed in the casing string and closed at the lower section. The casing string includes an on/off type cement injector, an outer packer 8, and an inner sealing nipple 9 which are connected sequentially from top to bottom.
The outer packer 8 is provided with a pressure transmitting hole. The setting tool string includes an outer sealing nipple 5, a landing collar 7 and an inner seal 11 which are connected sequentially from top to bottom. The outer sealing nipple 5 is provided with an over-flow hole 17. The over-flow hole 17 is located between the on/off type cement injector and the inner sealing nipple 9. The on/off type cement injector is sealed to the outer sealing nipple 5. The inner sealing nipple 9 is sealed to the inner seal 11. An anchoring mechanism for separating is provided between the on/off type cement injector and the outer sealing nipple 5.
The tubular string for drilling-free and fishing-free integrated well cementing and well completion provided by the present application solves the problems such as inadequate closing of the circulation hole and difficult retrieving of the cementing plug 15.
After the setting tool string is installed in place, the outer packer 8 is set. The setting tool string is pressed down, and then the on/off type cement injector is opened. The drill-rod 10 is filled with cement and the cementing plug 15 is put in for replacement. The setting tool string is lifted to close the on/off type cement injector, and the cementing plug 15 is retrieved. The entire construction process is performed continuously, avoiding waiting on cement.
Specifically, the setting tool string further includes: a drill-rod 10 located above the outer sealing nipple 5, the lower end of drill-rod 10 being connected to the upper end of the outer
7 Date Recue/Date Received 2020-04-28 sealing nipple 5; an inner guide shoe 12 with a closed lower end located below the inner seal 11, the upper end of the inner guide shoe 12 being connected to the lower end of the inner seal 11;
and a cementing plug 15, which can be put into the outer sealing nipple 5 and sealed to the landing collar 7.
Specifically, the casing string further includes: a screen pipe 14 located below the inner sealing nipple 9, the upper end of the screen pipe 14 being connected to the lower end of the inner sealing nipple 9; an outer guide shoe 13 with an opened lower end located below the screen pipe 14, the upper end of the outer guide shoe 13 being connected to the lower end of the screen pipe 14; and a generating casing 4 located above the on/off type cement injector, the lower end of the generating casing 4 being connected to the upper end of the on/off type cement injector.
The on/off type cement injector is a mechanical on/off type cement injector 6, which includes: an inner cylinder provided with a first through hole 18; and an outer cylinder, the lower end of which being connected to the outer packer 8, the outer cylinder being provided with a second through hole 19. The inner cylinder is installed in the outer cylinder in such a way that the inner cylinder is movable upwardly and downwardly therein. When the mechanical on/off type cement injector 6 is in a closed state, the first through hole 18 is located above the second through hole 19, and the side wall of the inner cylinder covers the second through hole 19. When the mechanical on/off type cement injector 6 is in an opened state, the inner cylinder is moved downward relative to the outer cylinder so that the first through hole 18 and the second through hole 19 are aligned and communicated with each other.
Specifically, the anchoring mechanism includes a thread provided on the outer sealing nipple 5 and a barb provided on the on/off type cement injector, so as to achieve the separation of the setting tool string and the casing string by reversely rotating the setting tool string.
The five implementation processes are described as follows.
1. The casing string is first tripped-in the wellhead, and then the setting tool string is tripped-in, as shown in FIG. 1.
At the wellhead, the casing string is tripped-in according to the above mentioned connection sequence. Thereafter, the casing string is suspended at the wellhead with a slip.
and a cementing plug 15, which can be put into the outer sealing nipple 5 and sealed to the landing collar 7.
Specifically, the casing string further includes: a screen pipe 14 located below the inner sealing nipple 9, the upper end of the screen pipe 14 being connected to the lower end of the inner sealing nipple 9; an outer guide shoe 13 with an opened lower end located below the screen pipe 14, the upper end of the outer guide shoe 13 being connected to the lower end of the screen pipe 14; and a generating casing 4 located above the on/off type cement injector, the lower end of the generating casing 4 being connected to the upper end of the on/off type cement injector.
The on/off type cement injector is a mechanical on/off type cement injector 6, which includes: an inner cylinder provided with a first through hole 18; and an outer cylinder, the lower end of which being connected to the outer packer 8, the outer cylinder being provided with a second through hole 19. The inner cylinder is installed in the outer cylinder in such a way that the inner cylinder is movable upwardly and downwardly therein. When the mechanical on/off type cement injector 6 is in a closed state, the first through hole 18 is located above the second through hole 19, and the side wall of the inner cylinder covers the second through hole 19. When the mechanical on/off type cement injector 6 is in an opened state, the inner cylinder is moved downward relative to the outer cylinder so that the first through hole 18 and the second through hole 19 are aligned and communicated with each other.
Specifically, the anchoring mechanism includes a thread provided on the outer sealing nipple 5 and a barb provided on the on/off type cement injector, so as to achieve the separation of the setting tool string and the casing string by reversely rotating the setting tool string.
The five implementation processes are described as follows.
1. The casing string is first tripped-in the wellhead, and then the setting tool string is tripped-in, as shown in FIG. 1.
At the wellhead, the casing string is tripped-in according to the above mentioned connection sequence. Thereafter, the casing string is suspended at the wellhead with a slip.
8 Date Recue/Date Received 2020-04-28 Then, for example, the setting tool string is tripped-in by a hook or a top drive until there is an abnormal change in the hanging load of the hook or the top drive, which means the setting tool string is tripped-in in place.
2. Cement with a pressure is injected into the wellhead, the outer packer 8 is pressurized .. and set, as shown in FIG. 2.
The casing string and the setting tool string achieve sealing at two locations by means of the outer sealing nipple 5 and the mechanical on/off type cement injector 6 as well as the inner seal 11 and the inner sealing nipple 9. The formed sealed space is communicated with the pressure transmitting hole of the outer packer 8. Pressure is pumped stepwisely from the wellhead to the drill-rod 10, and the pressure is delivered through the pressure transmitting hole and multiple sets of shear pins on the outer packer 8 are sequentially sheared off, to accomplish the setting of the outer packer 8.
3. The mechanical on/off type cement injector 6 is opened and designed amount of cement is injected, as shown in FIG. 3.
The drill-rod 10 is pressed down to a certain tonnage, the shear pins of the mechanical on/off type cement injector 6 are sheared off, the circulation hole is opened (that is, the inner cylinder moves downward to communicate the first through hole 18 with the second through hole 19) in order to achieve communication between the inside of the casing string and the outside of the casing string through the circulation hole, then the designed amount of cement is injected.
4. The cementing plug 15 replaces the cement until the bumping-the-plug occurs, as shown in FIG. 4.
The cementing plug 15 is put into the setting tool string through the cement head, and the replacement fluid is injected. The replacement fluid replaces the cementing plug 15 so that the cement passes through the circulation hole of the mechanical on/off type cement injector 6 and is injected into the interior of the casing string and the interior of the open-hole. The cementing plug 15 is brought into contact with the landing collar 7 to realize the bumping-the-plug.
5. The setting tool string is separated, waiting on cement and the integrated well cementing operation are accomplished, as shown in FIG. 5.
2. Cement with a pressure is injected into the wellhead, the outer packer 8 is pressurized .. and set, as shown in FIG. 2.
The casing string and the setting tool string achieve sealing at two locations by means of the outer sealing nipple 5 and the mechanical on/off type cement injector 6 as well as the inner seal 11 and the inner sealing nipple 9. The formed sealed space is communicated with the pressure transmitting hole of the outer packer 8. Pressure is pumped stepwisely from the wellhead to the drill-rod 10, and the pressure is delivered through the pressure transmitting hole and multiple sets of shear pins on the outer packer 8 are sequentially sheared off, to accomplish the setting of the outer packer 8.
3. The mechanical on/off type cement injector 6 is opened and designed amount of cement is injected, as shown in FIG. 3.
The drill-rod 10 is pressed down to a certain tonnage, the shear pins of the mechanical on/off type cement injector 6 are sheared off, the circulation hole is opened (that is, the inner cylinder moves downward to communicate the first through hole 18 with the second through hole 19) in order to achieve communication between the inside of the casing string and the outside of the casing string through the circulation hole, then the designed amount of cement is injected.
4. The cementing plug 15 replaces the cement until the bumping-the-plug occurs, as shown in FIG. 4.
The cementing plug 15 is put into the setting tool string through the cement head, and the replacement fluid is injected. The replacement fluid replaces the cementing plug 15 so that the cement passes through the circulation hole of the mechanical on/off type cement injector 6 and is injected into the interior of the casing string and the interior of the open-hole. The cementing plug 15 is brought into contact with the landing collar 7 to realize the bumping-the-plug.
5. The setting tool string is separated, waiting on cement and the integrated well cementing operation are accomplished, as shown in FIG. 5.
9 Date Recue/Date Received 2020-04-28 After bumping-the-plug, the setting tool string is lifted and rotated in reverse, and the inner cylinder is moved upward by the anchoring mechanism in order to close the circulation hole of the mechanical on/off type cement injector 6. The separation between the casing string and the setting tool string is completed. The setting tool string is retrieved, waiting on cement and the integrated well cementing operation are accomplished.
The wellbore structure includes a founation 1, an outer casing 2, outer cement 3 and an oil pipe 16.
In summary, the tubular string for drilling-free and fishing-free integrated well cementing and well completion provided by the present invention solves the problems such as inadequate closing of the circulation hole and difficult retrieving of the cementing plug. After the setting tool string is installed in place, the outer packer is set. The setting tool string is pressed down, and then the on/off type cement injector is opened. The drill-rod is filled with cement and the cementing plug is put in for replacement. The setting tool string is lifted to close the on/off type cement injector, and the cementing plug is retrieved. The entire construction process is performed continuously, avoiding waiting on cement.
In the description of the application, the terms "install", "join", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" may refer to fixed connection, detachable connection, or integral connection; and it may refer to connect directly or connect indirectly through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms herein can be understood according to specific situations.
In the description of this specification, the description of the terms "one embodiment", "some embodiments", -specific embodiments" and the like indicates that specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic references of the above terms do not necessarily relate to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
This disclosure is an example of the principles of the embodiments of the present Date Recue/Date Received 2020-04-28 application, and does not intend to limit the present application in any form or in substance, or limit the present application to specific implementations. It is obvious to those skilled in the art that the elements, methods, and systems and the like of the technical schemes of the embodiments of the present application can be changed, altered, modified, or evolved without departing from the principle, spirit and scope, as defined in the claims, of the embodiments and technical schemes of the present application as described above. These changed, altered, modified, or evolved implementations are all included in the equivalent embodiments of the present application, and these equivalent embodiments are within the scope defined by the claims of the present application. Although the embodiments of the present application may be embodied in many different forms, some embodiments of the present application are described in detail herein. In addition, the embodiments of this application include any possible combination of some or all of the various embodiments described herein which is also within the scope of this application as defined by the claims.
The above disclosure is intended to be illustrative, but not exhaustive. For those skilled in the art, this description will suggest many variations and alternatives.
All of these alternatives and variations are intended to be included within the scope of the claims, wherein the term "including" means "including but not limited to".
The description of the alternative embodiments of the invention is accomplished here.
Those skilled in the art will recognize other equivalent transformations to the embodiments described herein, which are also within the scope of the claims attached hereto.
Industrial Applicability The tubular string for drilling-free and fishing-free integrated well cementing and well completion provided by the embodiments of the present invention solves the problems such as inadequate closing of the circulation hole and difficult retrieving of the cementing plug, and thus it is suitable to be used in integrated well cementing and well completion operation. The embodiments of this invention also provide a method for using the tubular string for drilling-free and fishing-free integrated well cementing and well completion which can achieve the operation of well cementing and well completion efficiently and with high quality.
Date Recue/Date Received 2021-09-20
The wellbore structure includes a founation 1, an outer casing 2, outer cement 3 and an oil pipe 16.
In summary, the tubular string for drilling-free and fishing-free integrated well cementing and well completion provided by the present invention solves the problems such as inadequate closing of the circulation hole and difficult retrieving of the cementing plug. After the setting tool string is installed in place, the outer packer is set. The setting tool string is pressed down, and then the on/off type cement injector is opened. The drill-rod is filled with cement and the cementing plug is put in for replacement. The setting tool string is lifted to close the on/off type cement injector, and the cementing plug is retrieved. The entire construction process is performed continuously, avoiding waiting on cement.
In the description of the application, the terms "install", "join", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" may refer to fixed connection, detachable connection, or integral connection; and it may refer to connect directly or connect indirectly through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms herein can be understood according to specific situations.
In the description of this specification, the description of the terms "one embodiment", "some embodiments", -specific embodiments" and the like indicates that specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic references of the above terms do not necessarily relate to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
This disclosure is an example of the principles of the embodiments of the present Date Recue/Date Received 2020-04-28 application, and does not intend to limit the present application in any form or in substance, or limit the present application to specific implementations. It is obvious to those skilled in the art that the elements, methods, and systems and the like of the technical schemes of the embodiments of the present application can be changed, altered, modified, or evolved without departing from the principle, spirit and scope, as defined in the claims, of the embodiments and technical schemes of the present application as described above. These changed, altered, modified, or evolved implementations are all included in the equivalent embodiments of the present application, and these equivalent embodiments are within the scope defined by the claims of the present application. Although the embodiments of the present application may be embodied in many different forms, some embodiments of the present application are described in detail herein. In addition, the embodiments of this application include any possible combination of some or all of the various embodiments described herein which is also within the scope of this application as defined by the claims.
The above disclosure is intended to be illustrative, but not exhaustive. For those skilled in the art, this description will suggest many variations and alternatives.
All of these alternatives and variations are intended to be included within the scope of the claims, wherein the term "including" means "including but not limited to".
The description of the alternative embodiments of the invention is accomplished here.
Those skilled in the art will recognize other equivalent transformations to the embodiments described herein, which are also within the scope of the claims attached hereto.
Industrial Applicability The tubular string for drilling-free and fishing-free integrated well cementing and well completion provided by the embodiments of the present invention solves the problems such as inadequate closing of the circulation hole and difficult retrieving of the cementing plug, and thus it is suitable to be used in integrated well cementing and well completion operation. The embodiments of this invention also provide a method for using the tubular string for drilling-free and fishing-free integrated well cementing and well completion which can achieve the operation of well cementing and well completion efficiently and with high quality.
Date Recue/Date Received 2021-09-20
Claims (15)
1. A tubular string for drilling-free and fishing-free integrated well cementing and well completion, comprising a casing string and a setting tool string that is installed in the casing string and closed at a lower section, wherein the casing string comprises an on/off type cement injector, an outer packer and an inner sealing nipple which are connected sequentially from top to bottom, the outer packer being provided with a pressure transmitting hole; and wherein the setting tool string comprises an outer sealing nipple, a landing collar and an inner seal which are connected sequentially from top to bottom, the outer sealing nipple being provided with an over-flow hole located between the on/off type cement injector and the inner sealing nipple, the on/off type cement injector being sealed to the outer sealing nipple, the inner sealing nipple being sealed to the inner seal, an anchoring mechanism for separating being provided between the on/off type cement injector and the outer sealing nipple.
2. The tubular string for drilling-free and fishing-free integrated well cementing and well completion according to claim 1, wherein the setting tool string further comprises:
a drill-rod located above the outer sealing nipple, a lower end of the drill-rod being connected to an upper end of the outer sealing nipple.
a drill-rod located above the outer sealing nipple, a lower end of the drill-rod being connected to an upper end of the outer sealing nipple.
3. The tubular string for drilling-free and fishing-free integrated well cementing and well completion according to claim 1 or 2, wherein the setting tool string further comprises:
an inner guide shoe with a closed lower end, the inner guide shoe being located below the inner seal, an upper end of the inner guide shoe being connected to a lower end of the inner seal.
Date Recue/Date Received 2021-09-20
an inner guide shoe with a closed lower end, the inner guide shoe being located below the inner seal, an upper end of the inner guide shoe being connected to a lower end of the inner seal.
Date Recue/Date Received 2021-09-20
4. The tubular string for drilling-free and fishing-free integrated well cementing and well completion according to any one of claims 1 to 3, wherein the setting tool string further comprises:
a cementing plug capable of being put into the outer sealing nipple so as to be sealed to the landing collar.
a cementing plug capable of being put into the outer sealing nipple so as to be sealed to the landing collar.
5. The tubular string for drilling-free and fishing-free integrated well cementing and well completion according to any one of claims 1 to 4, wherein the casing string further comprises:
1 0 a screen pipe located below the inner sealing nipple, an upper end of the screen pipe being connected to a lower end of the inner sealing nipple.
1 0 a screen pipe located below the inner sealing nipple, an upper end of the screen pipe being connected to a lower end of the inner sealing nipple.
6. The tubular string for drilling-free and fishing-free integrated well cementing and well completion according to claim 5, wherein the casing string further comprises:
an outer guide shoe with an opened lower end, the outer guide shoe being located below the screen pipe, an upper end of the outer guide shoe being connected to a lower end of the screen pipe.
an outer guide shoe with an opened lower end, the outer guide shoe being located below the screen pipe, an upper end of the outer guide shoe being connected to a lower end of the screen pipe.
7. The tubular string for drilling-free and fishing-free integrated well cementing and well completion according to any one of claims 1 to 6, wherein the casing string further comprises:
a generating casing located above the on/off type cement injector, a lower end of the generating casing being connected to an upper end of the on/off type cement injector.
a generating casing located above the on/off type cement injector, a lower end of the generating casing being connected to an upper end of the on/off type cement injector.
8. The tubular string for drilling-free and fishing-free integrated well cementing and well completion according to any one of claims 1 to 7, wherein the on/off type cement injector is a mechanical on/off type cement injector.
Date Recue/Date Received 2021-09-20
Date Recue/Date Received 2021-09-20
9. The tubular string for drilling-free and fishing-free integrated well cementing and well completion according to claim 8, wherein the mechanical on/off type cement injector further comprises:
an inner cylinder provided with a first through hole; and an outer cylinder, a lower end of which being connected to the outer packer, the outer cylinder being provided with a second through hole; and wherein the inner cylinder is configured to be installed in the outer cylinder in such a way that the inner cylinder is movable upwardly and downwardly therein, wherein when the mechanical on/off type cement injector is in a closed state, the first through hole is located above the second through hole and a side wall of the inner cylinder covers the second through hole, and wherein when the mechanical on/off type cement injector is in an opened state, the inner cylinder is moved downward relative to the outer cylinder so that the first through hole and the second through hole are communicated with each other.
an inner cylinder provided with a first through hole; and an outer cylinder, a lower end of which being connected to the outer packer, the outer cylinder being provided with a second through hole; and wherein the inner cylinder is configured to be installed in the outer cylinder in such a way that the inner cylinder is movable upwardly and downwardly therein, wherein when the mechanical on/off type cement injector is in a closed state, the first through hole is located above the second through hole and a side wall of the inner cylinder covers the second through hole, and wherein when the mechanical on/off type cement injector is in an opened state, the inner cylinder is moved downward relative to the outer cylinder so that the first through hole and the second through hole are communicated with each other.
10. The tubular string for drilling-free and fishing-free integrated well cementing and well completion according to any one of claims 1 to 9, wherein the anchoring mechanism comprises a thread provided on the outer sealing nipple and a barb provided on the on/off type cement injector.
11. A method for drilling-free and fishing-free integrated well cementing and well completion, comprising using the tubular string for drilling-free and fishing-free integrated well cementing and well completion according to any one of claims 1 to 10, the method comprising the following steps:
at the wellhead first tripping-in the casing string and then tripping-in the setting tool string;
pressurizing and setting the outer packer;
pressing the setting tool string, opening the on/off type cement injector and injecting designed amount of cement;
Date Recue/Date Received 2021-09-20 putting the cementing plug into the setting tool string, injecting the cement into the interior of the casing string and the interior of the well through the on/off type cement injector, and bringing the cementing plug into contact with the landing collar to realize the bumping-the-plug; and lifting the setting tool string to close the on/off type cement injector by means of the anchoring mechanism, realizing the separation between the casing string and the setting tool string, waiting on cement, and accomplishing the integrated well cementing and well completion.
at the wellhead first tripping-in the casing string and then tripping-in the setting tool string;
pressurizing and setting the outer packer;
pressing the setting tool string, opening the on/off type cement injector and injecting designed amount of cement;
Date Recue/Date Received 2021-09-20 putting the cementing plug into the setting tool string, injecting the cement into the interior of the casing string and the interior of the well through the on/off type cement injector, and bringing the cementing plug into contact with the landing collar to realize the bumping-the-plug; and lifting the setting tool string to close the on/off type cement injector by means of the anchoring mechanism, realizing the separation between the casing string and the setting tool string, waiting on cement, and accomplishing the integrated well cementing and well completion.
12. The method according to claim 11, wherein the step of pressurizing and setting the outer packer comprises: after a sealed space formed by the sealing between the outer sealing nipple and the on/off type cement injector and the sealing between the inner seal and the inner sealing nipple is communicated with the pressure transmitting hole of the outer packer in the tripped-in casing string and setting tool string, a pressure is pumped to the setting tool string, the pressure is delivered through the pressure transmitting hole and multiple sets of shear pins on the outer packer are sheared off, to achieve the setting of the outer packer.
13. The method according to claim 11 or 12, wherein the step of opening the on/off type cement injector comprises: after pressing the setting tool string down to a certain tonnage, shearing off the shear pins of the on/off type cement injector, and moving the inner cylinder of the on/off type cement injector downward to communicate the first through hole of the inner cylinder of the on/off type cement injector with the second through hole of the outer cylinder of the on/off type cement injector, in order to achieve communication between the inside of the casing string and the well.
14. The method according to any one of claims 11 to 13, wherein the step of injecting the cement into the interior of the casing string and the interior of the well through the on/off type cement injector comprises: after putting the cementing plug into the setting tool string, injecting a replacement fluid which replaces the cementing plug, so that the cement is Date Recue/Date Received 2021-09-20 injected into the interior of the casing string and the interior of the well through the on/off type cement injector.
15. The method according to any one of claims 11 to 14, wherein the step of closing the on/off type cement injector by means of the anchoring mechanism comprises:
after the setting tool string is lifted, the inner cylinder of the on/off type cement injector is moved upward by the anchoring mechanism so as to disconnect the first through hole of the inner cylinder of the on/off type cement injector and the second through hole of the outer cylinder of the on/off type cement injector, thereby closing the on/off type cement injector.
Date Recue/Date Received 2021-09-20
after the setting tool string is lifted, the inner cylinder of the on/off type cement injector is moved upward by the anchoring mechanism so as to disconnect the first through hole of the inner cylinder of the on/off type cement injector and the second through hole of the outer cylinder of the on/off type cement injector, thereby closing the on/off type cement injector.
Date Recue/Date Received 2021-09-20
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| CN201711070853.2 | 2017-11-03 | ||
| CN201711070853.2A CN107701121B (en) | 2017-11-03 | 2017-11-03 | Exempt to bore and exempts to fish out solid completion integral tubing string |
| PCT/CN2018/089733 WO2019085472A1 (en) | 2017-11-03 | 2018-06-04 | Tubular column for drill-free and catch-free integrated well cementing and well completion and application thereof |
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| CA3080647A1 CA3080647A1 (en) | 2019-05-09 |
| CA3080647C true CA3080647C (en) | 2022-05-31 |
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| CA3080647A Active CA3080647C (en) | 2017-11-03 | 2018-06-04 | Tubular column for drill-free and catch-free integrated well cementing and well completion and application thereof |
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| CN (1) | CN107701121B (en) |
| CA (1) | CA3080647C (en) |
| WO (1) | WO2019085472A1 (en) |
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| CN105604508B (en) * | 2015-12-18 | 2018-04-06 | 中国石油天然气股份有限公司 | Liner hanger |
| CN205669389U (en) * | 2016-02-02 | 2016-11-02 | 德州隆科石油装备有限公司 | One exempts from brill formula cementing device |
| CN106555566A (en) * | 2016-12-07 | 2017-04-05 | 中国石油集团西部钻探工程有限公司 | Frangible stratum or the cementing method on broken stratum |
| CN206554872U (en) * | 2017-01-13 | 2017-10-13 | 中国石油天然气集团公司 | A kind of pitching builds the pressure device and the well shaft fixing technology tubing string with the device |
| CN207420469U (en) * | 2017-11-03 | 2018-05-29 | 中国海洋石油总公司 | Exempt to bore and exempt to drag for solid completion integral tubing string |
| CN107701121B (en) * | 2017-11-03 | 2019-05-28 | 中国海洋石油集团有限公司 | Exempt to bore and exempts to fish out solid completion integral tubing string |
-
2017
- 2017-11-03 CN CN201711070853.2A patent/CN107701121B/en active Active
-
2018
- 2018-06-04 WO PCT/CN2018/089733 patent/WO2019085472A1/en active Application Filing
- 2018-06-04 CA CA3080647A patent/CA3080647C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA3080647A1 (en) | 2019-05-09 |
| CN107701121B (en) | 2019-05-28 |
| WO2019085472A1 (en) | 2019-05-09 |
| CN107701121A (en) | 2018-02-16 |
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