CN112443290A - Anchoring packing cement surface control device and well cementation tubular column comprising same - Google Patents
Anchoring packing cement surface control device and well cementation tubular column comprising same Download PDFInfo
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- CN112443290A CN112443290A CN201910801620.8A CN201910801620A CN112443290A CN 112443290 A CN112443290 A CN 112443290A CN 201910801620 A CN201910801620 A CN 201910801620A CN 112443290 A CN112443290 A CN 112443290A
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- 239000004568 cement Substances 0.000 title claims abstract description 27
- 238000012856 packing Methods 0.000 title abstract description 16
- 238000004873 anchoring Methods 0.000 title abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000012546 transfer Methods 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000010008 shearing Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000005465 channeling Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 241000282472 Canis lupus familiaris Species 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
-
- 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
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- 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
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
- E21B33/1265—Packers; Plugs with fluid-pressure-operated elastic cup or skirt with mechanical slips
-
- 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
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides an anchoring and packing cement surface control device and a well cementing pipe column comprising the same, wherein the device comprises a body, a circulation hole which can be communicated inside and outside and a packer which is arranged at the lower end of the body are arranged on the wall of the body, the circulation hole is sealed in a first state, the circulation hole is opened for staged well cementing after the packer is seated in a second state, the circulation hole is sealed in a third state, the device can realize layered packing for a leakage-prone well, the pipe column cementing operation is completed for multiple times, the axial movement of the well cementing pipe column is avoided while the pressure of a liquid column is reduced, the cement surface height is effectively controlled, the further well cementing of leakage is reduced, the axial movement of the well cementing pipe column is prevented from influencing the strength of a cement interface, and the quality is improved.
Description
Technical Field
The invention belongs to the technical field of petroleum well cementation, and particularly relates to an anchoring packing cement surface control device and a well cementation tubular column comprising the same.
Background
Along with the continuous deepening of the exploration and development of oil and gas fields, the number of ultra-deep wells of the oil fields is increased continuously, and leakage wells are also continuously emerged. The well depth, the open hole section are long, the oil-gas-water display layers are multiple, the pressure system difference is large, the stratum bearing capacity is low, the well drilling and well cementing loss is serious, and the well cementing quality is difficult to guarantee.
Disclosure of Invention
Aiming at part or all of the technical problems in the prior art, the invention provides an anchoring and packing cement surface control device and a well cementation tubular column comprising the same. The device can realize the layering packing for the easy-to-leak well, and the cementing operation of the pipe column is completed for multiple times. The device can reduce the primary liquid column pressure, avoid axial movement of the cementing pipe column, effectively control the height of the cement surface, reduce further leakage, avoid the axial movement of the cementing pipe column from influencing the strength of the cement interface, and further improve the cementing quality. Because the packer can be constructed continuously for two or more levels after being expanded, the construction period is shortened, and the operation cost is reduced.
According to an aspect of the invention, there is provided an anchor pack cement surface control device comprising:
a body, a circulating hole which can be communicated with the inside and the outside is arranged on the wall of the body,
a packer arranged at the lower end of the body,
wherein in a first state the circulation hole is blocked, in a second state the circulation hole is opened for staged cementing after the packer is set, and in a third state the circulation hole is blocked.
In one embodiment, the packer has:
a sleeve which can be fixedly connected with the body,
the rubber sleeve component is arranged on the outer wall of the sleeve, the rubber sleeve component is provided with a rubber sleeve, an upper end ring sleeved on the outer wall above the rubber sleeve and an anchor clamping piece arranged on the outer wall of the lower end of the rubber sleeve, and the outer wall of the anchor clamping piece is provided with anchor clamping teeth for radial movement in the expansion sealing process of the rubber sleeve to play an anchor clamping role.
In one embodiment, the anchor clip comprises:
the embedded type is arranged on the main body section at the lower end of the rubber cylinder,
an anchor clamping section which is fixedly connected with the body section and axially extends upwards,
an arc inclined plane section used for connecting the body section and the anchor clamp section, the arc inclined plane of the arc inclined plane section faces upwards,
wherein, the anchor latch tooth sets up on the outer wall of anchor card section.
In one embodiment, the anchor catch is made of 2Cr13 stainless steel or 20 steel material.
In one embodiment, a pressure transfer channel is arranged on the sleeve and is used for communicating the inner cavity of the body and a hydraulic cavity formed between the rubber cylinder and the sleeve, wherein a liquid containing cavity is arranged on the sleeve in the middle of the pressure transfer channel.
In one embodiment, a one-way communication piece is arranged between the liquid containing cavity and the hydraulic cavity on the pressure transmission channel.
In one embodiment, a receiving cavity for receiving the one-way conduction member is provided on the sleeve at the lower end of the pressure transmission channel, and an elastic member is provided in the receiving cavity so that the one-way conduction member is in sealed communication with the upstream pressure transmission channel.
In one embodiment, the sleeve is a split component and has:
a sleeve main body which is fixedly connected with the main body, and the wall of the sleeve main body is provided with a pressure transmitting hole which extends axially and is contained in the pressure transmitting channel, the pressure transmitting hole is communicated with the inner cavity of the main body through a gap between the upper end surface of the sleeve main body and the first step surface of the main body,
a base pipe arranged at the lower end of the sleeve main body, the upper end of the base pipe extends into the inner cavity of the sleeve main body and is connected with the inner cavity, a groove is formed on the inner wall of the sleeve main body to form a liquid containing cavity with the outer wall of the base pipe, the groove is positioned at the lower end of the pressure transfer hole, the inner wall of the sleeve main body below the groove is in clearance fit with the outer wall of the base pipe to form a channel contained in the pressure transfer channel,
the spring sleeve is arranged at the lower end of the sleeve main body, the upper end of the spring sleeve extends to the outer wall of the sleeve main body to be fixedly connected with the outer wall, a second step surface is arranged on the inner wall of the spring sleeve to form an accommodating cavity with the lower end surface of the sleeve main body and the base pipe, the inner wall of the spring sleeve below the second step surface is in clearance fit with the outer wall of the base pipe to form a channel contained in the pressure transmission channel,
wherein, the upper end of the upper end ring is fixedly connected with the spring sleeve, and the rubber cylinder is sleeved on the base tube.
In one embodiment, an opening sleeve is arranged on the inner wall of the body through a first shearing pin and used for selectively plugging the circulation hole, an opening plug seat is arranged on the inner wall of the opening sleeve through a second shearing pin and used for selectively plugging a liquid inlet hole, and the liquid inlet hole is arranged on the opening sleeve and used for being communicated with the pressure transfer channel.
In one embodiment, a closing sleeve is provided on an inner wall of the body for selectively closing the circulation hole by a third shear pin, and a closing plug seat is fixedly provided on the inner wall of the closing sleeve.
According to another aspect of the invention, a well cementation tubular column is provided, which comprises a casing elastic centralizer, the device, a casing spiral resistance reduction centralizer, a float collar and a float shoe which are arranged in sequence from top to bottom.
Compared with the prior art, the invention has at least one of the following advantages that the device is used in the well cementation operation, after the first-stage (taking the second-stage as an example for explanation), the packer of the anchoring and packing cement surface control device expands and seals, the circulation hole is opened, and the circulation second-stage well cementation is carried out. At the moment, the packer bears the pressure of the upper pipe column after being expanded, so that the problem of aggravation of leakage loss of a leakage layer caused by the fact that lower cement bears overlarge liquid column pressure is solved, and the height of the first-stage well cementation cement surface is effectively controlled. In the process of secondary well cementation, the specific gravity of cement slurry is larger than that of slurry, the liquid column pressure is further increased, but the height of the cement surface of the secondary well cementation can be effectively controlled because the packer bears the pressure from the upper part. The height of the two-stage cement surface is effectively controlled, and the effective packing of the packer of the anchoring packing cement surface control device avoids the problems of gas channeling and the like, thereby improving the well cementation quality of the whole well cementation pipe column. In addition, the device can be used for continuous two-stage construction, and can shorten the construction period and reduce the operation cost after the primary cementing cement is solidified.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 shows a structural initial state diagram of an apparatus according to an embodiment of the invention;
FIG. 2 shows a structural packer swell condition diagram of a portion of the apparatus according to an embodiment of the invention;
FIG. 3 shows a view of the circulation holes open of a part of the apparatus according to one embodiment of the invention;
FIG. 4 shows a view of a part of the apparatus according to an embodiment of the invention in a closed state of the circulation holes;
FIG. 5 shows a cementing string according to one embodiment of the present invention;
FIG. 6 shows a shutoff plug according to one embodiment of the invention;
figure 7 shows an opening plug according to one embodiment of the invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
FIG. 1 shows an anchor pack cement surface control device 100 according to the present invention. As shown in fig. 1, the apparatus 100 includes a body 101 and a packer. The body 101 is cylindrical, and a circulation hole 1011 for secondary cementing is provided in the wall thereof so as to communicate between the inside and the outside. The packer is arranged at the lower end of the body 101 and is used for performing packing operation after primary cementing. Specifically, in the first state, that is, after the first stage of cementing, before the second stage of cementing (that is, in the first state described herein), the circulation hole 1011 is plugged to secure the run-in safety, etc. When circulation cementing is required, the packer is first actuated to separate the annulus into two sections, preventing liquid in the upper annulus from entering the lower annulus, and then the circulation hole 1011 is opened (i.e., in the second state). At the moment, the packer bears the pressure of the upper well cementation tubular column 300 and the well bore annulus after being expanded, so that the problem of aggravation of leakage loss of a leakage layer caused by the fact that lower cement bears overlarge liquid column pressure is solved, and the height of the first-stage well cementation cement surface is effectively controlled. In the process of secondary well cementation, the specific gravity of cement slurry is larger than that of slurry, the liquid column pressure is further increased, but the height of the cement surface of the secondary well cementation can be effectively controlled because the packer bears the pressure from the upper part. The height of the two-stage cement surface is effectively controlled, and the packer of the device 100 is effectively sealed, so that the problems of gas channeling and the like are avoided, and the well cementation quality of the whole well cementation pipe column 300 is improved. In addition, the device 100 can be used for continuous two-stage construction, the construction period can be shortened, and the operation cost can be reduced. The third state is a state in which the circulation hole 1011 needs to be closed after the second stage cementing is finished to ensure safety.
In one embodiment, the packer has a sleeve and a packing element assembly disposed on an outer wall of the sleeve. Specifically, the sleeve may be a separate piece for ease of assembly processing of the device 100. For example, the sleeve may have a sleeve body 102, a base pipe 103, and a spring sleeve 104. Wherein, the upper end of the sleeve main body 102 is fixedly connected with the body 101. For example, the upper end of the sleeve body 102 extends into the inner cavity of the body 101 and is secured by a threaded connection. The base pipe 103 is disposed at the lower end of the sleeve body 102. Specifically, the upper end of the base pipe 103 extends into the inner cavity of the sleeve body 102 and is threadedly connected with the sleeve body 102. The spring housing 104 is disposed at a lower end of the sleeve body 102, for example, an upper end of the spring housing 104 extends to an outer wall of the sleeve body 102, and is fixedly connected to the sleeve body 102 by a screw thread.
The glue cartridge assembly has a glue cartridge 201, an upper end ring 202 and an anchor catch 203. Wherein, the rubber cylinder 201 is sleeved on the outer wall of the base pipe 103 and used for radial expansion to play a role in packing. The upper end ring 202 is arranged at the upper end of the rubber cylinder 201 and mainly plays a role in fixing and connecting. Specifically, the lower end of the upper end ring 202 may be sleeved on the outer wall of the upper end of the rubber sleeve 201 by means of vulcanization, for example, and the upper end of the upper end ring 202 extends axially upward and is fixed on the outer wall of the spring sleeve 104. The upper end ring 202 overlaps the rubber tube 201 in an axial direction by a certain length for fixing each other and preventing the rubber tube 201 from protruding. The anchor clamping piece 203 is fixedly arranged at the lower end of the rubber barrel 201, and can play the role of anchor clamping in addition to the fixing and connecting functions. The anchor block 203 is sleeved on the outer wall of the rubber barrel 201, and the lower end of the anchor block is fixedly connected with the lower joint 117 (the lower joint 117 is arranged at the lower end of the base pipe 103 through threads).
The anchor 203 has a body section 2031, and a radial portion is embedded in a lower end of the rubber cartridge 201 and is axially embedded in a receiving groove formed by the lower joint 117 and the base pipe 103 together with the lower end of the rubber cartridge 201. This kind of arrangement can make body section 2031 radially support and press packing element 201 in order to improve packing element 201's connection stability, simultaneously for lower clutch 117 can protect packing element 201 to prevent that it from setting in advance. The anchor 203 also has an anchor segment 2032, which may be integral with the body segment 2031 and extends axially upward on the outer wall of the cartridge 201. Thereby also enabling the anchor catch 203 to function to secure the glue cartridge 201 and prevent protrusion. An anchor tooth 2033 is arranged on the outer wall of the anchor section 2032 for playing the role of anchor. During radial expansion of the rubber barrel 201, the anchor segments 2032 are actuated to deform and radially expand so that the anchor teeth 2033 bite into the borehole wall. By the arrangement, the setting stability of the well cementation tubular column 300 can be improved, the well cementation tubular column 300 is prevented from axially moving upwards, and the capability of controlling the height of a cement surface is further improved.
Preferably, a radiused ramp section 2034 is provided between body section 2031 and anchor snap section 2032. The slope of the circular arc slope section 2034 faces upward (it should be noted that the orientation term in this application may include straight upward and oblique upward, preferably, the slope is referred to as oblique upward here because of the slope), so as to limit the inward contraction of the rubber cartridge 201 here in the top-to-bottom direction. According to the connection mode, on the first hand, the rubber cylinder 201 can be clamped and fixed, so that the protruding prevention effect is better achieved, the rubber cylinder 201 is protected, and the service life is further prolonged; in the second aspect, the radial dimension of the anchor clamping section 2032 can be smoothly thinned relative to the body section 2031, and the anchor clamping section 2032 can be easily deformed and opened under the actuation of the rubber cylinder 201 to realize the anchor clamping effect; in the third aspect, the arc-shaped arrangement can effectively avoid stress concentration, thereby prolonging the service life. Further preferably, the anchor 203 is made of 2Cr13 stainless steel material. Of course, the anchor catch 203 is not limited to this material, but may be made of other materials with good elongation, such as 20 steel.
In one embodiment, the packers of the present application are set by hydraulic force actuation. The setting mode is simple to operate, the controllability of the setting position and the setting time is high, and the height and the quality of the well cementation cement surface can be effectively controlled. Structurally, a pressure transfer passage is provided for communicating the inner chamber of the body 101 with the hydraulic chamber 204 (formed between the rubber cylinder 201 and the base pipe 103). Therefore, the rubber tube 201 is expanded by injecting the pressure fluid into the hydraulic chamber 204 through the pressure transfer passage under the action of the hydraulic pressure. A specific embodiment of the pressure transfer channel is given below.
A pressure transfer bore 1021 extending axially is provided in the wall of the sleeve body 102. Further, upstream of the pressure transfer hole 1021, the pressure transfer hole 1021 communicates with the inner cavity of the main body 101 through a gap between the upper end surface of the sleeve main body 102 and the first step surface 1012 of the main body 101. Downstream of the pressure transfer holes 1021, a groove 1022 is preferably formed on the inner wall of the sleeve body 102 to form a liquid-containing chamber 205 with the outer wall of the base pipe 103. By providing the fluid chamber 205, the pressure fluid can be stored there to deliver a stable pressure fluid downstream. Downstream of the liquid containing cavity 205, the sleeve main body 102 is in clearance fit with the base pipe 103 to receive pressure liquid from the liquid containing cavity 205. Downstream, a second step surface 1041 is provided on the inner wall of the spring case 104 to form a receiving chamber 206 with the lower end surface of the sleeve body 102 and the base pipe 103. A one-way conductive member 207 is provided in the accommodation chamber 206. Meanwhile, an elastic member 208 is provided in the accommodation chamber 206. In the initial state, the elastic member 208 abuts the one-way conduction member 207 axially upward under its own elastic force, so that the one-way conduction member 207 is in sealed communication with the upstream pressure transmission passage. For example, sealing rings 209 may be provided on both the upper end surface and the inner wall surface of the one-way communication member 207 to form a sealing fit with the spring housing 104 and the base pipe 103, respectively. Downstream of the receiving chamber 206, the spring housing 104 is in clearance fit with the base pipe 103 for receiving pressure fluid through the one-way communication 207 and delivering the pressure fluid into the hydraulic chamber 204.
An opening sleeve 106 is provided on the inner wall of the body 101 through the first shear pin 105 for selectively blocking the circulation hole 1011. After the first shear pin 105 is sheared, the opening sleeve 106 is moved downward, and the circulation hole 1011 can be opened. Meanwhile, an opening plug seat 108 is provided on an inner wall of the opening sleeve 106 through a second shear pin 107 for selectively blocking the liquid inlet hole 115. The liquid inlet hole 115 is provided in the opening sleeve 106 and can communicate with a pressure transfer passage. A receiving sleeve 109 is fixedly arranged on the inner wall of the opening sleeve 106. The receiving sleeve 109 is located at the lower end of the opening plug seat 108. After shearing the second shear pin 107, the opening plug 108 moves down and seats on the receiving sleeve 109. Meanwhile, the liquid inlet hole 115 is opened so that the inner cavity of the body 101 communicates with the pressure transfer passage.
A closing sleeve 111 is provided on the inner wall of the body 101 through the third shear pin 110 for selectively closing the circulation hole 1011. A closing plug seat 112 is fixedly arranged on the inner wall of the closing sleeve 111. When the closure plug 500 is dropped and seated in the closure plug seat 112, the pump pressure may actuate the third shear pin 110 to shear and cause the closure sleeve 111 to move downward to block the circulation hole 1011. Preferably, a snap spring 113 is embedded on the outer wall of the closing sleeve 111, and a snap spring groove 114 capable of being engaged with the snap spring 113 is provided on the wall of the body 101. After the closing sleeve 111 moves down to close the circulation hole 1011, the snap spring 113 engages with the snap spring groove 114 to restrict the movement of the closing sleeve 111.
The device 100 also includes an upper connector 116 for connection. Wherein, the upper joint 116 is disposed above the body 101 and is fixedly connected with the body 101.
The present application also relates to a cementing string 300. As shown in fig. 5, the cementing string 300 comprises a casing elastic centralizer 301, the above-mentioned device 100, a casing helical drag reduction centralizer 302, a float collar 303 and a float shoe 304, which are arranged in sequence from top to bottom. It is noted that the present application is illustrated with one apparatus 100 for two-stage cementing. However, the present application is not limited to the number of the above-described devices 100, and for example, two or more of the above-described devices 100 may be provided to perform multi-stage cementing. In the cementing string 300, if a plurality of devices 100 are provided, the closing plug 500 and the opening plug 400, which are matched to the lower device 100, can smoothly pass through the upper device 100.
The operation of the cementing string 300 is described in detail below with respect to fig. 1 through 7.
First, a cementing string 300 is run into the wellbore. During run in, the opening sleeve 106 is in the original state, blocking the circulation hole 1011, as shown in fig. 1.
Then, when a secondary cementing cycle is required. The opening plug 400 shown in fig. 7 is first plunged. The opening plug 600 engages the opening plug seat 108 during downward travel to occlude the lumen of the device 100. Pumping pressure into the apparatus 100 causes the second shear pin 107 to shear, causing the opening plug seat 108 to move down and seat on the socket 109. At this point, the fluid inlet hole 115 is exposed, allowing fluid to enter the pressure transfer passage through the fluid inlet hole 115 and into the hydraulic chamber 204 of the packer. Under the action of hydraulic pressure, the rubber tube 201 expands to set. Also, the anchor dogs operate to anchor against the walls of the wellbore, as shown in figure 2. After the packer is set, pressurization continues, forcing the first shear pin 105 to shear, causing the opening sleeve 106 to move downward, exposing the circulation hole 1011, as shown in FIG. 3. To this end, the glue cartridge 201 has been inflated to isolate the annulus from above and below.
After completion of the cementing cycle, the cycle hole 1011 is pre-closed and a shutoff plug 500 as shown in fig. 6 may be run in. The closing plug 500 sits on the closing plug seat 112 during the falling process to form a seal, and the upper portion of the closing plug 500 forms a closed cavity. During pumping, when the pressure actuates the third shear pin 110 to shear, the closing sleeve 111 descends and closes the circulation hole 1011. At the same time, the circlip 113 enters the circlip groove 114 for preventing the closure sleeve 111 from backing up to achieve permanent closure, as shown in fig. 4.
In the present application, the terms "upper" and "lower" are used with reference to the actual operating orientation of the device 100.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. An anchor pack cement surface control device, comprising:
a body, wherein a circulating hole which can be communicated inside and outside is arranged on the wall of the body,
a packer disposed at a lower end of the body,
wherein in a first state the circulation hole is blocked, in a second state the circulation hole is opened for staged cementing after the packer is set, and in a third state the circulation hole is blocked.
2. The apparatus of claim 1, wherein the packer has:
a sleeve which can be fixedly connected with the body,
the rubber sleeve component is arranged on the outer wall of the sleeve and provided with a rubber sleeve, an upper end ring sleeved on the outer wall above the rubber sleeve and an anchor clamping piece arranged on the outer wall of the lower end of the rubber sleeve, and the outer wall of the anchor clamping piece is provided with anchor clamping teeth for radial movement in the expansion sealing process of the rubber sleeve to play an anchor clamping role.
3. The apparatus of claim 2, wherein the anchor catch comprises:
a main body section embedded at the lower end of the rubber cylinder,
an anchor clamping section which is fixedly connected with the body section and axially extends upwards,
a circular arc slope section for connecting the body section and the anchor clip section, the circular arc slope of the circular arc slope section facing upwards,
wherein the anchor latch teeth are arranged on the outer wall of the anchor clip section.
4. The device of claim 3, wherein the anchor clip is made of 2Cr13 stainless steel or 20 steel material.
5. The device according to any one of claims 2 to 4, wherein a pressure transfer passage for communicating an inner cavity of the body and a hydraulic pressure chamber formed between the rubber cartridge and the sleeve is provided on the sleeve, wherein a liquid containing chamber is provided on the sleeve at a middle of the pressure transfer passage.
6. The device according to claim 5, characterized in that a one-way communication member is provided on the pressure transfer channel between the liquid containing chamber and the hydraulic chamber.
7. The apparatus as claimed in claim 6, wherein a receiving chamber for receiving the one-way communication member is provided on the sleeve at a lower end of the pressure transmission passage, and an elastic member is provided in the receiving chamber so that the one-way communication member is in sealed communication with the upstream pressure transmission passage.
8. The device of claim 7, wherein the sleeve is a split component and has:
the sleeve main body is fixedly connected with the body, the wall of the sleeve main body is provided with a pressure transmitting hole which extends axially and is contained in the pressure transmitting channel, the pressure transmitting hole is communicated with the inner cavity of the body through a gap between the upper end surface of the sleeve main body and the first step surface of the body,
the base pipe is arranged at the lower end of the sleeve main body, the upper end of the base pipe extends into the inner cavity of the sleeve main body and is connected with the inner cavity, a groove is formed in the inner wall of the sleeve main body to form the liquid containing cavity with the outer wall of the base pipe, the groove is positioned at the lower end of the pressure transfer hole, the inner wall of the sleeve main body below the groove is in clearance fit with the outer wall of the base pipe to form a channel contained in the pressure transfer channel,
the spring sleeve is arranged at the lower end of the sleeve main body, the upper end of the spring sleeve extends to the outer wall of the sleeve main body to be fixedly connected with the outer wall of the sleeve main body, a second step surface is arranged on the inner wall of the spring sleeve to form the accommodating cavity together with the lower end face of the sleeve main body and the base pipe, the inner wall of the spring sleeve below the second step surface is in clearance fit with the outer wall of the base pipe to form a passage contained in the pressure transmission passage,
the upper end of the upper end ring is fixedly connected with the spring sleeve, and the rubber sleeve is sleeved on the base pipe.
9. The apparatus according to claims 5 to 8, characterized in that an opening sleeve is provided on the inner wall of the body by a first shear pin for selectively blocking the circulation hole, and an opening plug seat is provided on the inner wall of the opening sleeve by a second shear pin for selectively blocking an inlet hole provided on the opening sleeve for enabling communication with the pressure transfer passage.
10. A device according to any one of claims 1 to 9, wherein a closure sleeve is provided on the inner wall of the body by a third shear pin for selectively closing the circulation hole, a closure plug seat being fixedly provided on the inner wall of the closure sleeve.
11. A cementing string comprising, in order from top to bottom, a casing elastic centralizer, a device according to any one of claims 1 to 10, a casing helical drag reduction centralizer, a float collar and a float shoe.
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| CN201910801620.8A CN112443290A (en) | 2019-08-28 | 2019-08-28 | Anchoring packing cement surface control device and well cementation tubular column comprising same |
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| CN201910801620.8A CN112443290A (en) | 2019-08-28 | 2019-08-28 | Anchoring packing cement surface control device and well cementation tubular column comprising same |
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