CN111878028B - Inner pipe well cementation wellhead movable sealing device and method - Google Patents
Inner pipe well cementation wellhead movable sealing device and method Download PDFInfo
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- CN111878028B CN111878028B CN202010884892.1A CN202010884892A CN111878028B CN 111878028 B CN111878028 B CN 111878028B CN 202010884892 A CN202010884892 A CN 202010884892A CN 111878028 B CN111878028 B CN 111878028B
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- 238000007789 sealing Methods 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 108
- 230000000903 blocking effect Effects 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 230000001502 supplementing effect Effects 0.000 claims description 17
- 238000012856 packing Methods 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 239000000565 sealant Substances 0.000 abstract description 5
- 239000013589 supplement Substances 0.000 abstract 2
- 239000004568 cement Substances 0.000 description 8
- 239000002002 slurry Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides an inner pipe well cementation wellhead movable sealing device and a method. The blocking mechanism comprises a blocking core supplement and a core supplement valve which are mutually enclosed and sleeved on the drill rod; the sealing rubber core is sleeved between the drill rod and the casing to block and seal liquid moving upwards between the drill rod and the casing; the bearing mechanism comprises a lifting ring which can connect the bearing wing of the blocking mechanism with the bearing wing of the sleeve elevator, and an adjustable connecting piece which can adjust the tightness degree of the connection of the bearing wings; stop gear is used for preventing that the sealant core from dropping. The invention can improve the time-consuming problems of inner pipe cementing connection and disassembly; the movable sealing can be realized through the matching of the bearing mechanism and the sealing rubber core; the hydraulic control system can effectively inhibit the liquid in a well cementation or circulation casing from flowing outwards, plays a role in primary blocking, and can realize the effects of loose sealing in a low-pressure state and well pressure sealing assistance in a high-pressure state.
Description
Technical Field
The invention relates to an inner tube well cementation wellhead sealing device, belongs to the technical field of manufacturing of oil and gas industry well cementation tools, and particularly relates to an inner tube well cementation wellhead movable sealing device.
Background
In casing cementing in deep well and ultra-deep well technology, the casing size is large (generally exceeding 133/8'), the casing string length is large (exceeding 4000 meters), and the amount of cement slurry injected into the casing and the amount of cement slurry replaced are large, so that the problems of long construction time, difficulty in controlling annular cement height return (less amount, less height return, failure to meet the requirement, more amount of cement slurry returned, waste and environmental problems) and the like are caused. In order to ensure that cement slurry injected during well cementation can quickly return to the outer annular space of the casing, and simultaneously, in order to improve the accuracy of cement slurry return, an inner pipe well cementation method is adopted during well cementation, so that the construction time is shortened, and the cement slurry amount is effectively controlled.
The device for providing sealing between the inner pipe (drill pipe) and the casing pipe when the inner pipe is used for cementing is the inner pipe cementing sealing device. The inner pipe well cementation sealing device has two modes of bottom sealing and wellhead sealing, and the two sealing modes can be used independently and can also be matched for simultaneous use. In the ultra-deep well large casing well cementation, two sealing devices can be used simultaneously in order to ensure effective sealing.
The inventor finds that: existing wellhead seals employ a threaded connection with the casing to effect the seal and also to withstand the upward jacking force of the upward movement of the fluid. However, in an ultra-deep well, when the weight of a casing is large enough, after the casing is placed and the limiting clamp body is seated, the coupling of the last casing deforms due to overlarge bearing tensile force, so that the threads cannot be connected or the connection is very difficult. In addition, the threaded connection wellhead sealing device has the problems that the connection and the disassembly are time-consuming, movable sealing cannot be realized, the length adjustment of a pipe string is difficult, the field operation procedure is complicated, and the like.
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present invention to address at least one of the above mentioned problems in the prior art. For example, one of the purposes of the present invention is to provide a movable sealing device for an inner tube cementing wellhead, so as to effectively solve the technical defects that the existing sealing device cannot be connected with a deformed casing coupling, is time-consuming in threaded connection and disassembly, can only be used for fixed-point sealing, etc.
In order to achieve the purpose, the invention provides an inner pipe well cementation wellhead movable sealing device which comprises a plugging mechanism, a sealing mechanism, a limiting mechanism and a force bearing mechanism. Wherein, jam mechanism includes that first detachable connection spare and can enclose each other and close the jam on the first circumference of drilling rod with the suit and mend core valve, first detachable connection spare can mend the core with the jam that encloses and mend the core valve and be connected, and jam mechanism is formed with the lower part that has first external diameter and the upper portion that has the second external diameter and has the bearing wing of third external diameter, and wherein, first external diameter is less than sheathed tube internal diameter, and the second external diameter is greater than sheathed tube internal diameter, and the third external diameter is greater than the second external diameter. The bearing mechanism comprises a lifting ring and an adjustable connecting piece, the lifting ring can connect the bearing wing of the plugging mechanism with the bearing wing of the sleeve elevator, and the adjustable connecting piece can adjust the tightness degree of the connection between the bearing wing of the plugging mechanism and the bearing wing of the sleeve elevator; the sealing rubber core is arranged to be capable of being sleeved between a second circumference of the drill rod and the casing so as to block and seal liquid moving upwards between the drill rod and the casing, and the second circumference is located below the first circumference. Stop gear includes that the second can dismantle the connecting piece and can enclose spacing card and spacing card valve on the third circumference of suit at the drilling rod each other, the third circumference is located second circumference below, the connecting piece can be dismantled to the second can be connected the spacing card and the spacing card valve that enclose and close, spacing mechanism forms to have and can prevent the sealed gluey core drops and can be held in the sheathed tube size.
The invention also provides a movable sealing method for the inner pipe well cementation wellhead.
Compared with the prior art, the beneficial effects of the invention comprise at least one of the following:
the connection and force transmission between the drill rod and the casing pipe are realized;
the quick connection and the disassembly are convenient;
the method has the advantages that the liquid in the well cementation or circulation casing is effectively inhibited from overflowing, the primary plugging effect is achieved, and the loose sealing in a low-pressure state and the well pressure sealing assisting effect in a high-pressure state are achieved;
the movable sealing of the inner pipe well cementation quick connection wellhead is realized.
Drawings
FIGS. 1A-1C show front, side and cross-sectional views, respectively, of the overall construction of an exemplary embodiment of an inner tubular cementing wellhead live seal apparatus of the present invention;
FIGS. 2A-2C illustrate a front view, a top view, and a perspective view, respectively, of the plugging mechanism of FIG. 1;
fig. 3A and 3B show front and side views, respectively, of the messenger of fig. 1;
FIG. 4 shows a cross-sectional view of the plug glue cartridge of FIG. 1;
FIGS. 5A-5C show a top view, a front view, and a side view, respectively, of a spacing mechanism of the spacing mechanism of FIG. 1;
fig. 6A to 6B show a plug patch photograph and a patch shutter photograph, respectively, of the separation structure of the plugging mechanism in fig. 2.
The reference numerals are explained below:
1-blocking mechanism, 2-bearing mechanism, 3-sealant core, 4-limiting mechanism, A-casing limiting clamp, B-drill pipe, C-casing, 11-blocking complementary core, 12-complementary core valve, 13-first detachable connector, 21-hanging ring, 22-adjustable connector, 41-limiting clamp, 42-limiting clamp valve, and 43-second detachable connector.
Detailed Description
Hereinafter, the inner tube cementing wellhead live seal apparatus and method of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments. Also can be called as the inner tube cementing quick connection wellhead movable sealing device and the method. Herein, the terms "first," "second," "third," and the like are used for convenience of description and for convenience of distinction, and are not to be construed as indicating or implying relative importance or order of parts. "Upper" and "lower" are merely used for convenience of description and to refer to relative orientations or positional relationships, and do not indicate or imply that the referenced components must have that particular orientation or position.
In the first exemplary embodiment of the invention, the inner pipe well cementation wellhead movable sealing device comprises a plugging mechanism, a sealing rubber core, a limiting mechanism and a force bearing mechanism.
In particular, the plugging mechanism may comprise a first detachable connection (for example, a valve pin) and a plugging core and core supplementing valve that can enclose each other to fit over a first circumference of the drill rod. The blocking and supplementing core and the supplementing core valve are provided with first connecting holes (such as pin bosses) with the same inner hole diameter, so that the first detachable connecting piece can connect the enclosed blocking and supplementing core and the supplementing core valve together. The core supplementing valve can be freely opened and closed. The plugging mechanism is formed with a lower portion having a first outer diameter, an upper portion having a second outer diameter, and a force-bearing wing having a third outer diameter. Wherein the first outer diameter of the blocking mechanism is smaller than the inner diameter of the sleeve, the second outer diameter is larger than the inner diameter of the sleeve, and the third outer diameter is larger than the second outer diameter, so that the lower part of the blocking mechanism can be arranged in the sleeve, and the upper part of the blocking mechanism is seated on the sleeve.
The whole sealing rubber core is cylindrical. The inner diameter of the cylindrical sealant core may be greater than or equal to the outer diameter of the drill pipe, and the outer diameter thereof may be equal to or slightly less than the inner diameter of the casing pipe, so as to fit the sealant core on the drill pipe and fit the drill pipe into the casing pipe. The packing unit is configured to be capable of being sleeved between the second circumference of the drill pipe and the casing, so that liquid moving upwards between the drill pipe and the casing can be blocked and sealed. Wherein the second circumference of the drill rod is below the first circumference. The larger the pressure in the casing is, the more the sealing rubber core is compressed, the larger the force for tightly holding the outer wall of the drill rod and tightly attaching the inner wall of the casing is, so that the sealing capability of the sealing rubber core is increased, and the loose sealing in a low-pressure state and the well pressure sealing assisting effect in a high-pressure state are realized.
The force bearing mechanism comprises a lifting ring and an adjustable connecting piece (such as an adjusting bolt). The lifting ring is provided with a second connecting hole (for example, a screw hole) matched with the adjustable connecting piece, and the adjustable connecting piece can be freely screwed in the connecting hole of the lifting ring. The lifting ring can connect the bearing wing of the blocking mechanism with the bearing wing of the sleeve elevator, and the adjustable connecting piece can adjust the tightness degree of the connection between the bearing wing of the blocking mechanism and the bearing wing of the sleeve elevator.
The limit mechanism comprises a second detachable connector (e.g. a limit bayonet) and a limit bayonet valve which can enclose each other to be sleeved on the third circumference of the drill rod. Wherein the third circumference is located below the second circumference. The third connecting holes (for example, pin holes) with the same diameter of the inner holes are formed in the limiting card and the limiting card valve, so that the second detachable connecting piece can connect the enclosed limiting card with the limiting card valve. Wherein, the spacing card valve can freely open and shut. And the limiting mechanism is formed with a size which can prevent the sealant core from falling off and can be accommodated in the sleeve.
In the exemplary embodiment, the blocking mechanism and the force bearing mechanism can be used for realizing connection and force transmission between the drill rod and the casing, so that connection and disassembly are facilitated, and the problem that connection and disassembly are time-consuming is solved. The annular seal between the drill rod and the casing is realized through the sealing rubber core.
In a second exemplary embodiment of the present invention, based on the structure of the first exemplary embodiment described above, the blocking bushing includes a super-semicircular upper portion and a first semicircular lower portion, and the bushing shutter includes a sub-semicircular upper portion capable of forming an enclosing structure with the super-semicircular upper portion and a second semicircular lower portion capable of forming an enclosing structure with the first semicircular lower portion.
In the exemplary embodiment, the blocking mechanism can be firmly joined together by such a surrounding structure, enhancing the stability of the blocking mechanism.
In a third exemplary embodiment of the present invention, based on the structure of the first exemplary embodiment described above, the outer circumference of the packing unit may be flared and the inner circumference of the packing unit may be contracted short funnel-shaped. Wherein the outer diameter of the flared lower end is larger than the inner diameter of the casing, and the inner diameter of the short funnel-shaped lower end is smaller than the diameter of the second circumference of the drill rod, thereby sealing the liquid moving upwards between the drill rod and the casing. In addition, a right circular truncated cone-like cavity can be formed at the lower end part of the trumpet shape. When the pressure in the sleeve increases, the pressure acting on the whole end face of the lower part of the sealing rubber core can compress the whole sealing rubber core, so that the upper part of the sealing rubber core is compressed, the outer diameter of the outer periphery of the sealing rubber core is enlarged, the inner diameter of the inner periphery of the sealing rubber core is reduced, the outer wall of the drill rod is tightly held by the sealing rubber core, the inner wall of the sleeve is tightly attached, and a better sealing effect is obtained.
In the exemplary embodiment, the flared shape of the outer periphery design and the short funnel shape of the inner periphery design of the sealing rubber core effectively inhibit the liquid in the well cementation or circulation casing from flowing outwards, play a role in primary plugging, and are more favorable for realizing the loose sealing in a low-pressure state and the well pressure sealing-assisting effect in a high-pressure state.
Fig. 1A-1C show front, side and cross-sectional views, respectively, of the overall construction of an exemplary embodiment of the inner tubular cementing wellhead live seal apparatus of the present invention. Fig. 2A to 2C show a front view, a plan view, and a perspective view of the plugging mechanism in fig. 1, respectively. Fig. 3A and 3B show a front view and a side view of the structure of the force-bearing mechanism in fig. 1, respectively. FIG. 4 shows a cross-sectional structural view of the occlusive patch of FIG. 1. Fig. 5A to 5C show a top view, a front view, and a side view of the spacing mechanism in fig. 1. Fig. 6A to 6B show stereograms of a plugging patch and a patch shutter constituting the plugging mechanism, respectively.
In a fourth exemplary embodiment of the invention, as shown in fig. 1A to 1C, the inner tube well cementation wellhead movable sealing device comprises a plugging mechanism 1, a force bearing mechanism 2, a sealing rubber core 3 and a limiting mechanism 4.
As shown in fig. 2A to 2C and fig. 6, the plugging mechanism 1 includes a plugging patch 11, a patch shutter 12, and two first detachable links 13 (for example, shutter pins). The upper part of the blocking patch core 11 is an enclosing structure exceeding a semicircle, and the lower part is a first semicircle enclosing structure. Wherein the upper part of the plugging patch core 11 has two symmetrical force bearing wings and has two first connection holes (e.g. pin bosses) which can pass through the first detachable connector 13. The upper part of the core supplementing valve 12 is of a semicircular enclosing structure, and the lower part of the core supplementing valve is of a second semicircular enclosing structure. The upper portion of the refill valve 12 is symmetrically designed with two first connection holes through which the first detachable connection 13 can pass. The plugging patch 11 and the patch shutter 12 may be connected together by a first detachable connection 13. The core supplementing valve 12 can be freely opened and closed, the whole plugging mechanism 1 can be sleeved on the drill rod B by opening the core supplementing valve 12, then the core supplementing valve 12 is closed, and finally another first detachable connecting piece 13 is threaded, so that the plugging mechanism 1 is sleeved on the drill rod B.
As shown in fig. 1C, 3A, and 3B, the messenger 2 includes a hoist ring 21 and an adjustable connector 22 (e.g., an adjusting bolt). Hanging ring 21 has a connecting hole (e.g., a threaded hole) that mates with adjustable attachment 22, and adjustable attachment 22 can be freely screwed into the connecting hole on hanging ring 21. The lower end of the hanging ring 21 is sleeved on the bearing wing of the sleeve limiting clamp A, the upper end of the hanging ring is sleeved on the bearing wing of the blocking mechanism 1, the blocking mechanism 1 and the sleeve elevator can be tensioned by screwing the adjusting bolt, and the sleeve elevator is used for bearing the upper jacking force of the sealing rubber core 3 on the blocking mechanism 1.
As shown in fig. 1C and 4, the packing unit 3 is cylindrical as a whole, and has a cylindrical main body portion with an inner diameter larger than the outer diameter of the drill rod B and a cylindrical main body portion with an outer diameter smaller than the inner diameter of the casing C, so that the packing unit is fitted over the drill rod B and the drill rod B is inserted into the casing C. The inner port of the upper part of the sealing rubber core 3 is provided with an oblique angle. The periphery of the sealing rubber core 3 is in an outward flared horn shape, and the outer diameter of the lower end part of the horn shape is larger than the inner diameter of the sleeve C. The inner circumference of the sealing rubber core 3 is an inward-folded short funnel shape, and the inner diameter of the lower end part of the short funnel shape is smaller than the outer diameter of the drill rod B, so that the liquid moving upwards between the drill rod B and the sleeve C can be sealed.
When the liquid in the well cementation or the circulating casing C is gushed, the flared and the contracted short funnel-shaped rubber of the sealing rubber core 3 can seal the liquid, so that the liquid cannot gush outwards, and the primary plugging effect is achieved. When the pressure in the sleeve C increases, the pressure acting on the whole end face of the lower part of the sealing rubber core 3 can compress the whole sealing rubber core 3, so that the main body cylindrical part of the upper part of the sealing rubber core 3 is compressed, the outer diameter expands and the inner diameter reduces, thereby tightly holding the outer wall of the drill rod B and tightly clinging to the inner wall of the sleeve C to play a role in sealing. The larger the pressure in the casing C is, the more the sealing rubber core 3 is compressed, the larger the force for tightly holding the outer wall of the drill rod B and clinging to the inner wall of the casing C by the sealing rubber core 3 is, the larger the sealing capacity is, and thus the loose sealing in a low-pressure state and the well pressure sealing assisting effect in a high-pressure state are realized.
As shown in fig. 5A to 5C, the stopper mechanism 4 includes a stopper 41, a stopper shutter 42, and a second detachable connector 43 (e.g., a stopper pin). The limit card 41 and the limit card shutter 42 have second coupling holes (e.g., pin holes) having the same inner diameter, and the limit card 41 and the limit card shutter 42 can be coupled by a second detachable coupling member 43. Wherein, the limit card valve 42 can be freely opened and closed. And the limiting mechanism 4 is arranged on the drill rod B, so that the sealing rubber core 3 on the drill rod B can be prevented from falling.
In the exemplary embodiment, the blocking mechanism and the force bearing mechanism realize the connection and force transmission between the drill rod and the casing pipe, so that the connection and the disassembly become simple and easy; the sealing rubber core and the limiting mechanism are adopted to effectively realize sealing, so that the sealing reliability and the adaptability are greatly improved.
Further, in a fifth exemplary embodiment of the present invention, the inner tube cementing wellhead movable sealing method includes the inner tube cementing wellhead movable sealing device described in any one of the first to fourth exemplary embodiments above to achieve movable sealing.
For example, the inner tube cementing wellhead movable sealing method comprises the following steps:
sequentially mounting the sealing rubber core, the limiting mechanism and the blocking mechanism on the last drill rod in sequence;
connecting the last drill rod with the sealing rubber core, the limiting mechanism and the blocking mechanism with the drill rod which is put into the well, lowering the pipe column to enable the lower parts of the limiting mechanism, the sealing rubber core and the blocking mechanism to enter the casing, and connecting the bearing wing of the blocking mechanism with the bearing wing of the casing elevator through the bearing mechanism.
In the exemplary embodiment of the invention, the construction time can be effectively reduced by the inner pipe well cementation wellhead movable sealing method; meanwhile, the cement slurry return height can be accurately controlled, so that the engineering quality problem and the environmental problem are effectively avoided.
In a sixth exemplary embodiment of the present invention, in field use, the casing and the required drill pipe are first run in as needed for cementing, leaving the last drill pipe. And then the sealing rubber core is arranged on the last drill rod, the limiting clamp valve of the limiting mechanism is opened, the limiting mechanism is clamped on the drill rod, the limiting clamp valve is closed, and the second detachable connecting piece penetrates into the connecting hole, so that the limiting mechanism firmly holds the drill rod and can limit the sealing rubber core to be positioned between the limiting mechanism and the blocking mechanism all the time. After the sealing rubber core and the limiting mechanism are installed, the blocking mechanism is lifted by the lifting device, the core supplementing valve is opened, the blocking mechanism is clamped on the drill rod body, the core supplementing valve is closed again, and the first detachable connecting piece penetrates into the connecting hole, so that the drill rod can be firmly embraced by the blocking mechanism.
After the sealing rubber core, the limiting mechanism and the blocking mechanism are installed according to the method, the drill rod, the sealing rubber core, the limiting mechanism and the blocking mechanism which are installed on the drill rod are lifted to be connected with the drill rod which enters the well, then the pipe column is lowered, the lower parts of the limiting mechanism, the sealing rubber core and the blocking mechanism enter the casing, and the lower end face of the upper part of the blocking mechanism is seated on the upper end face of the casing coupling. And (3) disassembling the lifting system, installing the bearing mechanism on the bearing wings of the plugging mechanism and the bearing wings of the sleeve elevator, and screwing the adjustable connecting piece, so that the lifting ring tensions the bearing wings of the plugging mechanism and the sleeve elevator. The seal between the seal rubber core and the drill pipe and the sleeve can slide, the seal can be realized without a specific point, and the seal can be realized as long as the seal rubber core does not exceed the drill pipe joint, so that the movable seal is realized. The force acting on the lower end face of the sealing rubber core can push up the sealing rubber core, when the friction force between the sealing rubber core and the drill rod and the sleeve is not enough to resist the pushing up force, the sealing rubber core transmits the force to the blocking mechanism, and the blocking mechanism transmits the force to the sleeve elevator through the force bearing mechanism, so that the sleeve can be connected without the transmission and fastening of the force of the threads.
In conclusion, the inner pipe well cementation wellhead movable sealing device and the method have the advantages that: through the interaction force among the sealing rubber core, the blocking mechanism and the bearing mechanism, the connection of the sleeves can be realized without the aid of the force of threads, and the problem that the inner pipe well cementation connection and the disassembly take time is effectively solved; the movable sealing of the inner pipe well cementation wellhead is realized through the matching of the bearing mechanism and the sealing rubber core.
Although the present invention has been described above in connection with the exemplary embodiments and the accompanying drawings, it will be apparent to those of ordinary skill in the art that various modifications may be made to the above-described embodiments without departing from the spirit and scope of the claims.
Claims (9)
1. The inner pipe well cementation wellhead movable sealing device is characterized by comprising a plugging mechanism, a sealing rubber core, a force bearing mechanism and a limiting mechanism,
the blocking mechanism comprises a first detachable connecting piece, a blocking supplementing core and a core supplementing valve, wherein the blocking supplementing core and the core supplementing valve can be mutually enclosed to be sleeved on a first circumference of the drill rod; the blocking bushing comprises a super semicircle upper part and a first semicircle lower part, and the bushing valve comprises a sub semicircle upper part capable of forming an enclosing structure with the super semicircle upper part and a second semicircle lower part capable of forming an enclosing structure with the first semicircle lower part;
the sealing rubber core is arranged to be sleeved between a second circumference of the drill rod and the casing so as to block and seal liquid moving upwards between the drill rod and the casing, and the second circumference is located below the first circumference;
the bearing mechanism comprises a lifting ring and an adjustable connecting piece, the lifting ring can connect the bearing wing of the plugging mechanism with the bearing wing of the sleeve elevator, and the adjustable connecting piece can adjust the tightness degree of the connection between the bearing wing of the plugging mechanism and the bearing wing of the sleeve elevator;
stop gear includes that the second can dismantle the connecting piece and can enclose spacing card and spacing card valve on the third circumference of suit at the drilling rod each other, the third circumference is located second circumference below, the connecting piece can be dismantled to the second can be connected the spacing card and the spacing card valve that enclose and close, spacing mechanism forms to have and can prevent the sealed gluey core drops and can be held in the sheathed tube size.
2. The inner tube cementing wellhead movable sealing device according to claim 1, characterized in that the force bearing wings of the third outer diameter of the plugging mechanism are symmetrically arranged.
3. The inner tube cementing wellhead movable sealing device according to claim 1, characterized in that the outer periphery of the packing rubber core is flared and the inner periphery of the packing rubber core is adducted short funnel-shaped.
4. The inner tubular cementing wellhead active sealing device according to claim 3, characterized in that the outer diameter of the trumpet shaped lower end is larger than the inner diameter of the casing, and the inner diameter of the short funnel shaped lower end is smaller than the diameter of the second circumference of the drill pipe.
5. The inner tube cementing wellhead active sealing device according to claim 4, characterized in that the lower end of the trumpet shape is formed with a right-standing truncated cone shaped cavity.
6. A movable sealing method for a well mouth of an inner pipe well cementation type is characterized by comprising the step of realizing movable sealing by adopting the movable sealing device for the well mouth of the inner pipe well cementation type as claimed in any one of claims 1 to 5.
7. The inner tube cementing wellhead active sealing method according to claim 6, characterized in that it comprises the following steps:
installing the sealing rubber core, the limiting mechanism and the blocking mechanism on the last drill rod;
connecting the last drill rod with the sealing rubber core, the limiting mechanism and the blocking mechanism with a drill rod which enters a well; and (3) lowering the pipe column to enable the limiting mechanism, the sealing rubber core and the lower part of the blocking mechanism to enter the casing, and connecting the bearing wing of the blocking mechanism with the bearing wing of the casing elevator through the bearing mechanism.
8. The inner tube cementing wellhead moving sealing method according to claim 7, characterized in that the sealing rubber core, the limiting mechanism and the blocking mechanism are sequentially installed on the last drill rod.
9. The inner tubular cementing wellhead active sealing method according to claim 7, characterized in that the seal between the packing unit and the drill pipe and casing is slidable.
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| CN202010884892.1A CN111878028B (en) | 2020-08-28 | 2020-08-28 | Inner pipe well cementation wellhead movable sealing device and method |
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| CN202010884892.1A CN111878028B (en) | 2020-08-28 | 2020-08-28 | Inner pipe well cementation wellhead movable sealing device and method |
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| CN111878028A CN111878028A (en) | 2020-11-03 |
| CN111878028B true CN111878028B (en) | 2022-09-16 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2632307Y (en) * | 2003-06-27 | 2004-08-11 | 中国石油天然气股份有限公司 | Internal-pipe well cementing sealer |
| CN2900770Y (en) * | 2006-06-23 | 2007-05-16 | 中国石油天然气股份有限公司 | Oil pipe elelator well seal grab spray device |
| CN201080798Y (en) * | 2007-09-29 | 2008-07-02 | 濮阳市双发实业有限责任公司 | Split type shutter self-sealing device |
| CN201574718U (en) * | 2009-08-14 | 2010-09-08 | 中国石油天然气集团公司 | Blowout preventer at top end of oil pumping rod |
| CN202165049U (en) * | 2011-08-05 | 2012-03-14 | 中国石油天然气股份有限公司 | Tube-inserting well cementation device |
| CN202417402U (en) * | 2011-12-11 | 2012-09-05 | 杨桂青 | Dual-pipe operation blowout preventer of horizontal well |
| CN203547640U (en) * | 2013-11-26 | 2014-04-16 | 胜利油田同泰石油工程有限公司 | Novel blowout preventer |
| CN205297444U (en) * | 2015-12-24 | 2016-06-08 | 建湖县杰林石化机械有限公司 | Bottom slips formula casing head |
| CN205445492U (en) * | 2016-02-29 | 2016-08-10 | 中国石油天然气股份有限公司 | Drilling rod and transfer line |
| CN210714499U (en) * | 2019-05-31 | 2020-06-09 | 中国石油天然气股份有限公司 | Device for installing self-sealing rubber core |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7325610B2 (en) * | 2000-04-17 | 2008-02-05 | Weatherford/Lamb, Inc. | Methods and apparatus for handling and drilling with tubulars or casing |
-
2020
- 2020-08-28 CN CN202010884892.1A patent/CN111878028B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2632307Y (en) * | 2003-06-27 | 2004-08-11 | 中国石油天然气股份有限公司 | Internal-pipe well cementing sealer |
| CN2900770Y (en) * | 2006-06-23 | 2007-05-16 | 中国石油天然气股份有限公司 | Oil pipe elelator well seal grab spray device |
| CN201080798Y (en) * | 2007-09-29 | 2008-07-02 | 濮阳市双发实业有限责任公司 | Split type shutter self-sealing device |
| CN201574718U (en) * | 2009-08-14 | 2010-09-08 | 中国石油天然气集团公司 | Blowout preventer at top end of oil pumping rod |
| CN202165049U (en) * | 2011-08-05 | 2012-03-14 | 中国石油天然气股份有限公司 | Tube-inserting well cementation device |
| CN202417402U (en) * | 2011-12-11 | 2012-09-05 | 杨桂青 | Dual-pipe operation blowout preventer of horizontal well |
| CN203547640U (en) * | 2013-11-26 | 2014-04-16 | 胜利油田同泰石油工程有限公司 | Novel blowout preventer |
| CN205297444U (en) * | 2015-12-24 | 2016-06-08 | 建湖县杰林石化机械有限公司 | Bottom slips formula casing head |
| CN205445492U (en) * | 2016-02-29 | 2016-08-10 | 中国石油天然气股份有限公司 | Drilling rod and transfer line |
| CN210714499U (en) * | 2019-05-31 | 2020-06-09 | 中国石油天然气股份有限公司 | Device for installing self-sealing rubber core |
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| CN111878028A (en) | 2020-11-03 |
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