CN112282681B - Casing hanger and sealing assembly lowering tool - Google Patents
Casing hanger and sealing assembly lowering tool Download PDFInfo
- Publication number
- CN112282681B CN112282681B CN202011160008.6A CN202011160008A CN112282681B CN 112282681 B CN112282681 B CN 112282681B CN 202011160008 A CN202011160008 A CN 202011160008A CN 112282681 B CN112282681 B CN 112282681B
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- Prior art keywords
- sleeve
- mandrel
- casing hanger
- seal assembly
- sealing assembly
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- 238000007789 sealing Methods 0.000 title claims abstract description 57
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 230000006835 compression Effects 0.000 claims description 22
- 238000007906 compression Methods 0.000 claims description 22
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a lowering tool, in particular to a lowering tool for a casing hanger and seal assembly, and belongs to the technical field of petroleum and natural gas resource exploration and development. The mandrel comprises an upper mandrel and a lower mandrel, the sealing assembly hanging sleeve is sleeved outside the mandrel, the driving sleeve and the casing hanger hanging sleeve are sequentially arranged in an annulus between the mandrel and the sealing assembly hanging sleeve from top to bottom, the sealing assembly hanging sleeve is provided with a sealing assembly hoisting and releasing mechanism, the casing hanger hoisting and releasing mechanism is arranged on the casing hanger hanging sleeve, the driving sleeve moves up and down relative to the mandrel to drive the sealing assembly hoisting and releasing mechanism to complete the hoisting and releasing operation of the sealing assembly, and the casing hanger hanging sleeve moves up and down relative to the mandrel to drive the casing hanger hoisting and releasing mechanism to complete the hoisting and releasing operation of the casing hanger.
Description
Technical Field
The invention relates to a lowering tool, in particular to a lowering tool for a casing hanger and seal assembly, and belongs to the technical field of petroleum and natural gas resource exploration and development.
Background
At present, ocean oil and gas exploitation has become an important development direction of energy development, an underwater wellhead system is a key device influencing the ocean oil and gas exploitation, and a casing hanger and a sealing assembly are important components of the wellhead system, so that the descending and installation of the casing hanger and the sealing assembly directly influence the reliability of underwater drilling and production. The casing hanger is called a casing hanger and is arranged on the top of the casing string to hang the casing string, so that the weight of the casing string is borne. When the casing hanger is installed, a certain annular space is generated between the casing hanger and the high-pressure well head, the annular space needs to be sealed by a sealing assembly, and the high-pressure well head, the sealing assembly and the casing hanger are sequentially arranged from outside to inside after the casing hanger is installed.
The invention discloses a tool for lowering an underwater casing hanger and a sealing assembly, which comprises a mandrel, a sealing assembly hanging sleeve, a casing hanger hanging sleeve and a driving sleeve, wherein a locking nut is arranged at the upper part of the mandrel, the middle thread section of the mandrel and the internal thread of the driving sleeve are mutually configured by four axial wide grooves, a sealing assembly locking block and a spring are arranged on a sealing assembly hanger and used for locking the sealing assembly, and an opening locking ring and an anti-rotation pin are arranged on a shaft shoulder of the casing hanger and used for fixing the casing hanger. This patent can be transferred the casing hanger alone or sealed assembly, also can realize that both transfer simultaneously, can accomplish sealed assembly's recovery simultaneously. However, when the casing hanger and the sealing assembly are lowered, the axial position of the mandrel needs to be fixed, and the mandrel needs to be rotated until the mandrel is separated from the casing hanger; and then the axial position of the mandrel is not fixed, the mandrel is rotated to separate the mandrel from the driving sleeve, the mandrel is lowered until the sealing assembly is installed on the sealing surface, and then the mandrel is separated from the sealing assembly. Therefore, the process of lowering the casing hanger and the sealing assembly is still complex, the lowering time is long, and the ocean oil and gas exploitation efficiency cannot be effectively guaranteed.
Disclosure of Invention
The invention aims to solve the problems and provides a casing hanger and seal assembly lowering tool which can make the casing hanger and seal assembly lowering process simpler and faster, save the lowering time and effectively improve the ocean oil gas exploitation efficiency. The technical scheme adopted by the invention is as follows:
the casing hanger and seal assembly lowering tool is characterized in that the mandrel comprises an upper mandrel and a lower mandrel, the upper mandrel is in threaded connection with the lower mandrel, the seal assembly hanging sleeve is sleeved outside the mandrel, the seal assembly hanging sleeve is positioned through a positioning shaft shoulder arranged on the upper mandrel, a locking nut is in threaded connection with the upper portion of the upper mandrel, the drive sleeve and the casing hanger hanging sleeve are sequentially arranged in an annular space between the mandrel and the seal assembly hanging sleeve from top to bottom, the drive sleeve and the casing hanger hanging sleeve are both in threaded connection with the upper mandrel, the drive sleeve and the casing hanger hanging sleeve are both in sliding connection with the seal assembly hanging sleeve, the seal assembly hanging sleeve is provided with a seal assembly hoisting assembly and a release mechanism, the casing hanger hanging sleeve is provided with a casing hanger and a release mechanism, the drive sleeve drives the seal assembly to move up and down relative to drive the seal assembly and release the seal assembly hoisting assembly, and the casing hanger sleeve release mechanism complete the hoisting operation of the seal assembly and the casing hanger, and the casing hanger sleeve release operation is completed by relative to the casing hanger sleeve.
Preferably, an upper central runner is arranged at the center of the upper mandrel, a lower central runner is arranged at the center of the lower mandrel, and the diameters of the upper central runner and the lower central runner are equal.
Preferably, a mandrel convex part is fixedly arranged outside the lower mandrel, and a first arc flange is arranged at the lower end of the mandrel convex part.
Preferably, the cross section of the inner cavity of the sealing assembly hanging sleeve is a regular polygon, the cross section of one end, in sliding fit with the sealing assembly hanging sleeve, of the driving sleeve is a regular polygon, and the cross section of one end, in sliding fit with the sealing assembly hanging sleeve, of the casing hanger hanging sleeve is a regular polygon.
Preferably, a plurality of drain holes are formed in the upper end of the sealing assembly suspension sleeve in an array manner in the direction around the axis, and the drain holes are formed in the outer side of the positioning shaft shoulder.
Preferably, a shaft shoulder is arranged outside the sealing assembly hanging sleeve and used for positioning and driving the sealing assembly, a first cavity used for installing the sealing assembly hoisting and releasing mechanism is arranged on the outer side of the lower end of the sealing assembly hanging sleeve, and a first positioning flange used for limiting the sealing assembly hoisting and releasing mechanism is fixedly arranged on the outermost side of the first cavity.
Preferably, the sealing assembly hoisting and releasing mechanism comprises a first locking block matched with the sealing assembly, a first sliding block fixedly connected with the first locking block, a second semicircular flange fixedly arranged at the front end of the first sliding block, and a first compression spring arranged in the first cavity and positioned between the first positioning flange and the first sliding block, wherein one end of the first compression spring is fixedly connected with the first positioning flange, and the other end of the first compression spring is fixedly connected with the first sliding block.
Preferably, an annular space between the driving sleeve and the sealing assembly suspension sleeve forms a slide way, and the upper end of the driving sleeve is provided with a first semicircular flange.
Preferably, a sleeve convex part is arranged at the lower end of the casing hanger hanging sleeve, a second cavity for installing the casing hanger hoisting and releasing mechanism is formed in the sleeve convex part, and a second positioning flange for limiting the casing hanger hoisting and releasing mechanism is fixedly arranged on the outermost side of the second cavity.
Preferably, the casing hanger hoisting and releasing mechanism comprises a second locking block matched with the casing hanger, a second sliding block fixedly connected with the second locking block, a second arc flange fixedly arranged at the front end of the second sliding block, and a second compression spring arranged in the second cavity and positioned between the second positioning flange and the second sliding block, wherein one end of the second compression spring is fixedly connected with the second positioning flange, and the other end of the second compression spring is fixedly connected with the second sliding block.
The invention has the following advantages: according to the casing hanger and seal assembly lowering tool, the casing hanger and seal assembly lowering operation can be completed by fixing the seal assembly hanging sleeve and rotating the mandrel in a fixed shaft, and the casing hanger and seal assembly lifting operation can be completed by fixing the seal assembly hanging sleeve and rotating the mandrel in a fixed shaft reverse direction, so that the casing hanger and seal assembly lowering and taking out process is simpler and faster, the lowering time is saved, and the ocean oil and gas exploitation efficiency is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a casing hanger and seal assembly running tool according to an embodiment of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1 ofbase:Sub>A casing hanger and seal assembly running tool according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view B-B of the casing hanger and seal assembly running tool of the embodiment of the present invention;
FIG. 4 is an enlarged view of the casing hanger and seal assembly running tool at M of FIG. 1 in accordance with an embodiment of the present invention;
FIG. 5 is an enlarged view of the casing hanger and seal assembly running tool of the present invention taken at N in FIG. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A casing hanger and seal assembly running tool according to an embodiment of the present invention will be described in detail with reference to fig. 1-5.
Referring to fig. 1, a casing hanger and seal assembly lowering tool provided by the embodiment of the present invention mainly comprises a mandrel, a seal assembly hanging sleeve 30, a driving sleeve 40, a casing hanger hanging sleeve 50, a seal assembly hoisting and releasing mechanism 60, and a casing hanger hoisting and releasing mechanism 80, wherein the upper end of the mandrel is in threaded connection with an upper drill rod, and the lower end of the mandrel is in threaded connection with a lower tool. In order to facilitate quick mounting of the drive sleeve 40 and the casing hanger suspension sleeve 50, the mandrel is divided into two sections, an upper mandrel 10 and a lower mandrel 20, which are connected by a screw thread. When the invention is installed, the driving sleeve 40 and the casing hanging sleeve 50 are sequentially installed on the upper mandrel 10, then the sealing assembly hanging sleeve 30 is sleeved above the positioning shaft shoulder 12 of the upper mandrel 10, then the locking nut 100 is installed on the upper part of the upper mandrel 10, and finally the lower mandrel 20 is installed at the bottom of the upper mandrel 10. Wherein the seal assembly hoisting and releasing mechanism 60 is mounted on the seal assembly suspending sleeve 30 for hoisting and releasing the seal assembly 70, and the casing hanging hoisting and releasing mechanism 80 is mounted on the casing hanger suspending sleeve 50 for hoisting and releasing the casing hanger 90. An external thread is arranged on the outer cylindrical surface of the upper mandrel 10, internal threads matched with the external thread of the upper mandrel 10 are arranged in the inner hole of the driving sleeve 40 and the inner hole of the upper part of the casing hanger suspension sleeve 50, and the driving sleeve 40 and the casing hanger suspension sleeve 50 are connected to the upper mandrel 10 in a threaded mode from top to bottom. The driving sleeve 40 of the present invention moves up and down relative to the mandrel to drive the seal assembly lifting and releasing mechanism 60 to complete the lifting and releasing operation of the seal assembly 70, and the casing hanger hanging sleeve 50 moves up and down relative to the mandrel to drive the casing hanger lifting and releasing mechanism 80 to complete the lifting and releasing operation of the casing hanger 90.
It should be noted that, the upper mandrel 10 and the lower mandrel 20 of the invention are respectively provided with an upper central flow passage 11 and a lower central flow passage 21, and the diameters of the upper central flow passage 11 and the lower central flow passage 21 are equal, and the upper central flow passage 11 and the lower central flow passage 21 together form a central flow passage of a lowering tool for slurry to pass through during well cementation; a plurality of drain holes 31 distributed in a circumferential array are formed in the upper end of the seal assembly hanging sleeve 30 around the axial direction of the seal assembly hanging sleeve, and the drain holes 31 are formed in the outer side of the positioning shaft shoulder 12 and used for draining the lowering tool.
Referring to fig. 1, 2 and 3, the present invention is directed to limiting the relative rotation between the drive sleeve 40, the casing hanger sleeve 50 and the seal assembly hanger sleeve 30, i.e., limiting the relative rotation between the drive sleeve 40 and the seal assembly hanger sleeve 30 and between the casing hanger sleeve 50 and the seal assembly hanger sleeve 30. The present invention provides for a sliding connection between the drive sleeve 40 and the seal assembly suspension sleeve 30 and between the casing suspension sleeve 50 and the seal assembly suspension sleeve 30. Specifically, the cross section of the inner cavity of the seal assembly hanging sleeve 30 is set to be a regular polygon, and the cross section of the contact surface of the driving sleeve 40, the casing hanger hanging sleeve 50 and the seal assembly hanging sleeve 30 is also a regular polygon. The regular polygon may be one of a regular hexagon, a regular octagon and a regular decagon, and is preferably a regular octagon, as shown in fig. 2 and 3. When the seal assembly hanging sleeve 30 is stationary and the mandrel is fixed in axis rotation (i.e. when the mandrel is stationary in axial direction), the driving sleeve 40 and the casing hanger hanging sleeve 50 can only move upward or downward relative to the mandrel in an annulus between the upper mandrel 10 and the seal assembly hanging sleeve 30, so that the driving sleeve 40 moves up and down relative to the mandrel to drive the seal assembly hoisting and releasing mechanism 60 to complete the hoisting and releasing operation of the seal assembly 70, and the casing hanger hanging sleeve 50 moves up and down relative to the mandrel to drive the casing hanger hoisting and releasing mechanism 80 to complete the hoisting and releasing operation of the casing hanger 90.
Referring to fig. 1 and 4, the seal assembly lifting and releasing mechanism 60 of the present invention includes a first locking block 61 connected to a seal assembly 70, a first sliding block 62 fixedly connected to the first locking block 61, a second semicircular flange 63 fixedly disposed at a front end of the first sliding block 62, and a first compression spring 64 installed in the first cavity 32 and located between the first positioning flange 33 and the first sliding block 62, wherein one end of the first compression spring 64 is fixedly connected to the first positioning flange 33, and the other end is fixedly connected to the first sliding block 62, and the material of the first locking block 61 is 35CrMnSiA, it should be noted that 35CrMnSiA is a low-alloy ultra-high strength steel, and has good comprehensive mechanical properties, high strength and sufficient toughness after heat treatment, and even if the lifting and releasing operation of the seal assembly 70 is frequently completed, a long service life can be ensured.
Lowering the seal assembly 70 of the present invention: the lowering tool is first moved to the seal assembly 70 installation position, as shown in FIG. 1, where seal assembly 70 is installed on first lock 61 of seal assembly hoist and release mechanism 60. The sealing assembly hanging sleeve 30 is fixed, the mandrel is fixed to rotate, due to the constraint of the regular polygonal contact surface of the sealing assembly hanging sleeve 30, the driving sleeve 40 which is installed on the upper mandrel 10 in a threaded mode moves downwards relative to the upper mandrel 10 until the sealing assembly hoisting and releasing mechanism 60 is separated from the driving sleeve 40, at the moment, the first sliding block 62 is popped inwards under the action of the elastic restoring force of the first compression spring 64, the first locking block 61 moves inwards to enter the first cavity 32, the sealing assembly 70 is completely separated from the sealing assembly hoisting and releasing mechanism 60, and the releasing of the sealing assembly 70 is completed.
When it is desired to lift the seal assembly 70, the lowering tool is first moved to the installation position of the seal assembly 70, at which time the driving sleeve 40 is located below the seal assembly lifting and releasing mechanism 60 without contacting each other, and the first locking piece 61 is located in the first cavity 32. The fixed seal assembly suspension sleeve 30 and the mandrel fixed shaft rotate reversely, the driving sleeve 40 moves upwards relative to the upper mandrel 10, and moves to the second semicircular flange 63 to enter the slide way 41, wherein the slide way 41 is an annular space between the driving sleeve 40 and the seal assembly suspension sleeve 30, in the process, the first slide block 62 compresses the first compression spring 64 and moves outwards, the first lock block 61 extends out of the first cavity 32 to be connected with the seal assembly 70, and the lowering tool is lifted up to complete the lifting of the seal assembly 70.
Referring to fig. 4, in order to enable the driving sleeve 40 to smoothly pass through the first sliding block 62 and eject the driving sleeve outwards along the first cavity 32, the first semicircular flange 42 is arranged at the upper end of the sealing assembly suspension sleeve 30, and the second semicircular flange 63 is arranged at the front end of the first sliding block 62, so that the passing difficulty and efficiency are greatly improved through the circular arc arrangement. It should be noted that, the exterior of the seal assembly hanging sleeve 30 of the present invention is provided with a shaft shoulder for positioning and driving the seal assembly 70 to complete setting, the outer side of the lower end of the seal assembly hanging sleeve 30 is provided with a first cavity 32 for installing the seal assembly hoisting and releasing mechanism 60, and the outermost side of the first cavity 32 is fixedly provided with a first positioning flange 33 for limiting the first compression spring 64 of the seal assembly hoisting and releasing mechanism 60.
Referring to fig. 1 and 5, the casing hanger lifting and releasing mechanism 80 of the present invention includes a second locking block 81 connected to a casing hanger 90, a second sliding block 82 fixedly connected to the second locking block 81, a second arc flange 83 fixedly disposed at a front end of the second sliding block 82, and a second compression spring 84 installed in the second cavity 52 and located between the second positioning flange 53 and the second sliding block 82, wherein one end of the second compression spring 84 is fixedly connected to the second positioning flange 53, and the other end is fixedly connected to the second sliding block 82. The material of the second locking block 81 is 35CrMnSiA, and it should be noted that 35CrMnSiA is low-alloy ultrahigh-strength steel, and has good comprehensive mechanical properties, high strength and sufficient toughness after heat treatment, and even if the hoisting and releasing operation of the casing hanger 90 is frequently completed, the long service life can be ensured.
The process of lowering the casing hanger 90 of the invention comprises the following steps: the lowering tool is lowered to a set distance L above the installation position of the casing hanger 90, as shown in fig. 1, at which time the casing hanger 90 is installed on the second lock block 81. The fixed sealing assembly suspension sleeve 30 and the mandrel are rotated in a fixed shaft mode, due to the constraint of the regular polygonal contact surface of the sealing assembly suspension sleeve 30, the casing hanger suspension sleeve 50 mounted on the upper mandrel 10 moves downwards by a distance L relative to the upper mandrel 10, at the moment, the casing hanger 90 mounting position is reached, the casing hanger hoisting and releasing mechanism 80 is separated from contact with the lower mandrel 20, the second sliding block 82 is popped inwards under the elastic force action of the second compression spring 84, the second locking block 81 moves inwards to enter the second cavity 52, the casing hanger 90 is completely separated from the casing hanger hoisting and releasing mechanism 80, and the casing hanger 90 is released.
When the casing hanger 90 needs to be lifted, the lowering tool is moved to a position below the installation position of the sealing assembly 70 by a set distance L, at this time, the casing hanger lifting and releasing mechanism 80 is located below the first arc flange 23, the second sliding block 82 is sprung inwards under the elastic force action of the second compression spring 84, and the second locking block 81 is located in the second cavity 52. The fixed seal assembly suspension sleeve 30 and the mandrel are fixed to rotate in opposite directions, the casing hanger suspension sleeve 50 moves upwards for a distance L relative to the upper mandrel 10, at the moment, the installation position of the seal assembly 70 is reached, the second sliding block 82 compresses the second compression spring 84 and moves outwards, the second locking block 81 extends out of the second cavity 52 to be connected with the casing hanger 90, and the lowering tool is lifted up to finish the lifting of the casing hanger 90.
Referring to fig. 5, in order to realize that the second slide block 82 smoothly passes through the mandrel protrusion 22 and is ejected out along the second cavity 52, a first arc flange 23 is disposed at the lower end of the mandrel protrusion 22, wherein the mandrel protrusion 22 is fixedly disposed outside the lower mandrel 20. It should be noted that the lower end of the casing hanger suspension sleeve 50 of the present invention is provided with a sleeve protrusion 51, the sleeve protrusion 51 is provided with a second cavity 52 for installing the casing hanger hoisting and releasing mechanism 80, and the outermost side of the second cavity 52 is fixedly provided with a second positioning flange 53 for limiting the casing hanger hoisting and releasing mechanism 80.
After the lowering task of the casing hanger 90 and the seal assembly 70 is completed, the casing hanger and seal assembly lowering tool can be lifted out of a wellhead through a drill rod in threaded connection above an upper lifting mandrel; the invention can complete the lowering operation of the casing hanger 90 and the seal assembly 70 by fixing the seal assembly hanging sleeve 30 and rotating the mandrel in a fixed shaft, and can complete the lifting operation of the casing hanger 90 and the seal assembly 70 by fixing the seal assembly hanging sleeve 30 and rotating the mandrel in a fixed shaft reverse direction, thereby enabling the lowering and taking out processes of the casing hanger 90 and the seal assembly 70 to be simpler and faster, saving the lowering time and effectively improving the ocean oil gas exploitation efficiency.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (4)
1. A casing hanger and seal assembly lowering tool comprises a mandrel, a seal assembly hanging sleeve, a driving sleeve and a casing hanger hanging sleeve, wherein the upper end of the mandrel is in threaded connection with a drill rod, the lower end of the mandrel is in threaded connection with a lower tool, the mandrel is characterized by comprising an upper mandrel and a lower mandrel, the upper mandrel is in threaded connection with the lower mandrel, the seal assembly hanging sleeve is sleeved outside the mandrel, the seal assembly hanging sleeve is positioned through a positioning shaft shoulder arranged on the upper mandrel, a locking nut is in threaded connection with the upper portion of the upper mandrel, the driving sleeve and the casing hanger hanging sleeve are sequentially arranged in an annular space between the mandrel and the seal assembly hanging sleeve from top to bottom, the driving sleeve and the casing hanger sleeve are both in threaded connection with the upper mandrel, the driving sleeve and the casing hanger sleeve are both in sliding connection with the seal assembly hanging sleeve, the seal assembly hanging sleeve is provided with a seal assembly hoisting mandrel and a release mechanism, the casing hanger sleeve is provided with a casing hanger and a release mechanism, the driving sleeve completes the casing hanger and the casing hanger release operation of the casing hanger and the casing hanger release mechanism relative to the casing hanger sleeve;
the lowering operation of the casing hanger and the sealing assembly can be finished by suspending the sleeve through the fixed sealing assembly and rotating the mandrel through the fixed shaft, and the lifting operation of the casing hanger and the sealing assembly can be finished by suspending the sleeve through the fixed sealing assembly and reversely rotating the mandrel through the fixed shaft;
a mandrel convex part is fixedly arranged outside the lower mandrel, and a first arc flange is arranged at the lower end of the mandrel convex part; a slideway is formed by an annular space between the driving sleeve and the sealing assembly hanging sleeve, and a first semicircular flange is arranged at the upper end of the driving sleeve;
a shaft shoulder is arranged outside the sealing assembly hanging sleeve and used for positioning and driving the sealing assembly, a first cavity used for installing the sealing assembly hoisting and releasing mechanism is formed in the outer side of the lower end of the sealing assembly hanging sleeve, and a first positioning flange used for limiting the sealing assembly hoisting and releasing mechanism is fixedly arranged on the outermost side of the first cavity; the sealing assembly hoisting and releasing mechanism comprises a first locking block matched with the sealing assembly, a first sliding block fixedly connected with the first locking block, a second semicircular flange fixedly arranged at the front end of the first sliding block, and a first compression spring arranged in the first cavity and positioned between the first positioning flange and the first sliding block, wherein one end of the first compression spring is fixedly connected with the first positioning flange, and the other end of the first compression spring is fixedly connected with the first sliding block;
a sleeve convex part is arranged at the lower end of the sleeve hanger hanging sleeve, a second cavity for installing the sleeve hanger hoisting and releasing mechanism is formed in the sleeve convex part, and a second positioning flange for limiting the sleeve hanger hoisting and releasing mechanism is fixedly arranged on the outermost side of the second cavity; the casing hanger hoisting and releasing mechanism comprises a second locking block matched with the casing hanger, a second sliding block fixedly connected with the second locking block, a second arc flange fixedly arranged at the front end of the second sliding block, and a second compression spring arranged in the second cavity and positioned between the second positioning flange and the second sliding block, wherein one end of the second compression spring is fixedly connected with the second positioning flange, and the other end of the second compression spring is fixedly connected with the second sliding block.
2. The casing hanger and seal assembly lowering tool of claim 1, wherein the upper mandrel has an upper central flow passage defined in the center thereof, the lower mandrel has a lower central flow passage defined in the center thereof, and the upper central flow passage and the lower central flow passage have the same diameter.
3. The casing hanger and seal assembly lowering tool according to claim 1, wherein the cross-section of the inner cavity of the seal assembly hanging sleeve is a regular polygon, the cross-section of one end of the driving sleeve in sliding fit with the seal assembly hanging sleeve is a regular polygon, and the cross-section of one end of the casing hanger hanging sleeve in sliding fit with the seal assembly hanging sleeve is a regular polygon.
4. The casing hanger and seal assembly lowering tool according to claim 3 wherein the seal assembly suspending sleeve upper end has a plurality of vent holes arrayed about the axis, the vent holes opening out of the locating shoulder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011160008.6A CN112282681B (en) | 2020-10-27 | 2020-10-27 | Casing hanger and sealing assembly lowering tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011160008.6A CN112282681B (en) | 2020-10-27 | 2020-10-27 | Casing hanger and sealing assembly lowering tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112282681A CN112282681A (en) | 2021-01-29 |
| CN112282681B true CN112282681B (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011160008.6A Expired - Fee Related CN112282681B (en) | 2020-10-27 | 2020-10-27 | Casing hanger and sealing assembly lowering tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112282681B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027370B (en) * | 2021-04-13 | 2022-12-02 | 美钻能源科技(上海)有限公司 | Casing hanger and annular seal combined running tool and running method |
| CN113153194B (en) * | 2021-04-29 | 2022-04-15 | 四川大学 | Rotary dynamic sealing device of core lifting mechanism |
| CN115095293B (en) * | 2022-07-27 | 2023-10-13 | 中国地质科学院勘探技术研究所 | Prevent sleeve pipe and scurry suspension seal device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5069288A (en) * | 1991-01-08 | 1991-12-03 | Fmc Corporation | Single trip casing hanger/packoff running tool |
| US9909385B2 (en) * | 2013-04-22 | 2018-03-06 | Cameron International Corporation | Rotating wellhead hanger assemblies |
| CN106555560A (en) * | 2016-04-01 | 2017-04-05 | 中国石油大学(华东) | A kind of casing hanger under water and seal assembly decentralization instrument |
| CN210798910U (en) * | 2019-11-08 | 2020-06-19 | 中国石油大学(华东) | Tool for lowering underwater wellhead head sleeve pipe hanger and sealing assembly |
-
2020
- 2020-10-27 CN CN202011160008.6A patent/CN112282681B/en not_active Expired - Fee Related
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| CN112282681A (en) | 2021-01-29 |
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