CN112253043A - High-pressure well cementing cement head - Google Patents
High-pressure well cementing cement head Download PDFInfo
- Publication number
- CN112253043A CN112253043A CN202011429229.9A CN202011429229A CN112253043A CN 112253043 A CN112253043 A CN 112253043A CN 202011429229 A CN202011429229 A CN 202011429229A CN 112253043 A CN112253043 A CN 112253043A
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- Prior art keywords
- cement head
- head body
- rotating shaft
- stop pin
- cement
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- 239000004568 cement Substances 0.000 title claims abstract description 93
- 238000003466 welding Methods 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000007569 slipcasting Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the technical field of cement heads, in particular to a high-pressure well cementation cement head which comprises a cement head body, an upper cylinder, a quick connector, a union connector and a stop pin assembly, wherein a grouting channel is arranged in the cement head body, the upper end of the cement head body is fixedly connected with the upper cylinder, the lower end of the cement head body is fixedly connected with the quick connector, the middles of the front side wall and the rear side wall of the cement head body are respectively in threaded connection with the union connector, the stop pin assembly is arranged on the cement head body and comprises a stop pin, a rotating shaft, a fastening nut and an indicating rotating handle, the rotating shaft is rotatably arranged on the side wall of the cement head body, and the stop pin is detachably and fixedly connected with the. The invention has reasonable and compact structure and convenient use, and can bear larger grouting pressure and meet the requirement of high-pressure well cementation operation by connecting the union connector with the cement head body in a threaded manner and welding the union connector with the threaded connection part of the cement head body.
Description
Technical Field
The invention relates to the technical field of cement heads, in particular to a high-pressure well cementing cement head.
Background
The cementing head is an indispensable wellhead tool in well cementation construction, and the pipeline joint on the conventional well cementation cementing head is fixed on a cementing head body by simple welding at present, and the pressure grade is usually 35MPa and 50 MPa. Along with the increase of exploration and development difficulty, deep wells, ultra-deep wells, high-density and clean water replacement cementing increase, high-pressure cementing construction becomes a normal state, the maximum construction pressure of most block cementing is far beyond the pressure level of a conventional cementing head, the maximum construction pressure of a 127mm oil layer casing cementing is over 55MPa, the maximum construction pressure of a 139.7mm cementing is over 62MPa, and the existing cementing heads at the pressure levels of 35MPa and 50MPa cannot meet the requirements of field construction; and the stop pin subassembly in the cementing head needs to be changed or maintained after being used for many times, and the stop pin subassembly in the existing cementing head is troublesome to dismantle and has high replacement or maintenance difficulty.
Disclosure of Invention
The invention provides a high-pressure well cementation cementing head, overcomes the defects of the prior art, can effectively solve the problem that the existing cementing head cannot meet the high-pressure well cementation construction, and can quickly and conveniently replace or maintain a stop pin assembly.
The technical scheme of the invention is realized by the following measures: a high-pressure well cementation cement head comprises a cement head body, an upper barrel, a quick connector, a union connector and a stop pin assembly, wherein a vertically through grouting channel is arranged in the cement head body, the upper end of the cement head body is fixedly connected with the upper barrel, the lower end of the cement head body is fixedly connected with the quick connector, the middle part of the outer side wall of the cement head body is in threaded connection with the union connector communicated with the grouting channel, the threaded connection part of the union connector and the cement head body is welded together, the stop pin assembly is arranged on the cement head body corresponding to the position above the union connector and comprises a stop pin, a rotating shaft, a fastening nut and an indicating rotating handle, the rotating shaft which is horizontally arranged from front to back is rotatably arranged on the wall of the cement head body corresponding to the position at the left side of the grouting channel in a penetrating manner, an accommodating groove is arranged on the inner wall of the grouting channel corresponding to the position at the middle part of the rotating shaft, the stop pin left end extends to the holding tank in and can dismantle fixed connection with the rotation axis middle part, the stop pin can be in the downward upset entering holding tank when the rotation axis clockwise turning, threaded connection has stop pin control valve assembly on the cementing head body that corresponds stop pin right side position, stop pin control valve assembly is in the same place with the threaded connection department welding of cementing head body, the rotation axis outside threaded connection who corresponds cementing head body the place ahead position has fastening nut, the rotation axis outside that corresponds cementing head body rear position is equipped with the instruction and rotates the handle.
The following is further optimization or/and improvement of the technical scheme of the invention:
the stop pin control valve assembly comprises a cylindrical valve body, external threads are arranged on the outer sides of two ends of the valve body, a valve core is arranged in the valve body, an arc-shaped limiting table protruding leftwards is arranged at the lower end of the left side of the valve core, a driving shaft is fixedly arranged in the middle of the right end of the valve core, a fixed end cover capable of limiting the valve core to move horizontally is connected to the outer side of the right end of the valve body through threads, the fixed end cover is sleeved, an opening hand wheel which can transmit torque is arranged on the driving shaft corresponding to the right side of the fixed end cover, a valve core mounting hole which is communicated from left to right is arranged on the wall of the cement head body corresponding to the right side of the stop pin, the outer side wall of the cementing head body corresponding to the right end of the valve core mounting hole is coaxially provided with a threaded hole matched with the external thread at the left end of the valve body, the valve body is screwed in the threaded hole, the valve core is rotatably and hermetically arranged in the valve core mounting hole, and the right end of the stop pin is lapped on the concave arc surface at the upper end of the arc-shaped limit table.
The wall of the cement head body corresponding to the left position of the grouting channel is provided with a rotating shaft mounting hole, the rotating shaft penetrates through the rotating shaft mounting hole, two ends of the rotating shaft are respectively provided with a sealing ring capable of forming a seal with the rotating shaft mounting hole, the middle of the rotating shaft is polygonal and is positioned in the accommodating groove, the left end of the stop pin is provided with a polygonal column hole which is matched with the middle of the polygonal rotating shaft and is communicated with the front and the back of the polygonal column hole, and the middle of the rotating shaft is arranged in the polygonal.
The cement head body wall corresponding to the middle position of the rotating shaft is provided with a rectangular pyramid platform hole which is through from left to right and is small in left and large in right, a rectangular pyramid platform matched with the rectangular pyramid platform hole is arranged in the rectangular pyramid platform hole corresponding to the left position of the middle of the rotating shaft, and the right side wall of the rectangular pyramid platform and the inner wall of the rectangular pyramid platform hole are enclosed to form an accommodating groove used for accommodating the stop pin.
The cement head body is of a hollow rectangular tubular structure, and a cylindrical grouting channel which is communicated up and down is formed inside the cement head body.
The invention has reasonable and compact structure and convenient use, and can bear larger grouting pressure and meet the requirement of high-pressure well cementation operation by connecting the union connector and the stop pin control valve assembly on the cement head body through screw threads and welding the joint of the union connector and the cement head body and the joint of the stop pin control valve assembly and the cement head body; through making backing pin and rotation axis can dismantle fixed connection, be convenient for change or maintain backing pin subassembly.
Drawings
FIG. 1 is a schematic sectional view of the preferred embodiment of the present invention.
FIG. 2 is a cross-sectional view of the stop pin assembly of FIG. 1 taken along line A-A.
Fig. 3 is a schematic sectional view of the union joint of fig. 1 along the line B-B.
The codes in the figures are respectively: the cement head comprises a cement head body 1, an upper cylinder body 2, a quick connector 3, a union connector 4, a stop pin 5, a rotating shaft 6, a fastening nut 7, an indicating rotating handle 8, a valve body 9, a sealing ring 10, a multi-prism hole 11, a rectangular pyramid hole 12, a rectangular pyramid platform 13, a valve core 14, a fixed end cover 15, a driving shaft 16, a limiting platform 17 and an opening hand wheel 18.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
as shown in attached figures 1, 2 and 3, the high-pressure well cementation cement head comprises a cement head body 1, an upper barrel 2, a quick connector 3, a union connector 4 and a stop pin assembly, wherein a vertically through grouting channel is arranged inside the cement head body 1, the upper end of the cement head body 1 is fixedly connected with the upper barrel 2, the lower end of the cement head body 1 is fixedly connected with the quick connector 3, the middle part of the outer side wall of the cement head body 1 is in threaded connection with the union connector 4 communicated with the grouting channel, the threaded connection part of the union connector 4 and the cement head body 1 is welded together, the stop pin assembly is arranged on the cement head body 1 corresponding to the position above the union connector 4 and comprises a stop pin 5, a rotating shaft 6, a fastening nut 7 and an indicating rotating handle 8, the rotating shaft 6 which is horizontally arranged from front to back is installed on the wall of the cement head body 1 corresponding to the left side of the grouting channel in a penetrating, be equipped with the holding tank on the slip casting passageway inner wall that corresponds 6 middle part positions of rotation axis, stop pin 5 is located 4 tops of union connector and is about to the level set up in the slip casting passageway, stop pin 5 left end extends to in the holding tank and can dismantle fixed connection with 6 middle parts of rotation axis, stop pin 5 can be when rotation axis 6 clockwise turning during the upset gets into the holding tank downwards, threaded connection has the stop pin control valve assembly that enables 6 right-hand members level spacing of stop pin or relieve spacing realization upset on the cement head body 1 wall that corresponds 5 right side positions, stop pin control valve assembly is in the same place with the welding of the threaded connection department of cement head body 1, 6 outside threaded connection of the rotation axis that corresponds 1 the place ahead position of cement head body has fastening nut 7, 6 outsides of the rotation axis that corresponds 1 rear position of cement head body are equipped with the instruction and rotate handle 8.
During well cementation, a stop pin 5 is horizontally arranged in a grouting channel at the left and right sides in an initial state, a rubber plug is thrown into an upper cylinder 2 to the stop pin 5, then the upper cylinder 2 is sealed, the fast joint 3 is used for connecting the cement grouting device with a casing pipe in a well, a cement slurry injection pipeline is connected to a union joint 4, cement slurry is injected into the well through the union joint 4, the union joint 4 is in threaded connection with a cement head body 1 and is welded with the joint of the union joint 4 and the cement head body 1, the joint of a stop pin control valve assembly and the cement head body 1 is also welded, and then cement slurry can be injected into the well by using larger grouting pressure; after the cement slurry is injected, the horizontal limit is relieved by controlling the stop pin control valve assembly, and the stop pin 6 turns clockwise from the horizontal position and falls into the accommodating groove under the action of the self gravity of the stop pin 6 and the thrust of the rubber plug 11; thereby removing the plugging of the rubber plug, releasing the rubber plug and performing pulp replacement operation; if the stop pin component needs to be replaced or maintained, only the fastening nut 7 needs to be detached, the stop pin control valve assembly is opened, the rotating shaft 6 is detached from the cementing head body 1, the stop pin 5 is taken out of the stop pin control valve assembly, and then replacement or maintenance is carried out. The invention has reasonable and compact structure and convenient use, and can bear larger grouting pressure and meet the requirement of high-pressure well cementation operation by connecting the union connector 4 and the stop pin control valve assembly on the cement head body 1 through threads and welding the joint of the union connector 4 and the cement head body 1 and the joint of the stop pin control valve assembly and the cement head body 1; the stop pin assembly is convenient to replace or maintain by enabling the stop pin 5 to be detachably and fixedly connected with the rotating shaft 6.
The high-pressure well cementing cement head can be further optimized or/and improved according to actual needs:
as shown in the attached figures 1 and 2, the stop pin control valve assembly comprises a cylindrical valve body 9, external threads are arranged on the outer sides of two ends of the valve body 9, a valve core 14 is arranged in the valve body, an arc-shaped limit table 17 protruding leftwards is arranged at the lower end of the left side of the valve core 14, a drive shaft 16 is fixedly arranged in the middle of the right end of the valve core 14, a fixed end cover 15 capable of limiting the horizontal movement of the valve core 14 is connected to the outer side of the right end of the valve body 9 through threads, the fixed end cover 15 is sleeved on the drive shaft 16, an opening hand wheel 18 capable of transmitting torque is arranged on the drive shaft 16 corresponding to the right side position of the fixed end cover 15, a valve core mounting hole penetrating left and right is arranged on the wall of a cement head body 1 corresponding to the right side position of a stop pin 5, a threaded hole matched with the external threads at the, the right end of the stop pin 5 is lapped on the concave arc surface at the upper end of the arc-shaped limit table 17. According to the requirement, the cross section of the right end of the driving shaft 16 is of a polygonal structure, a polygonal mounting hole matched with the cross section of the driving shaft 16 is formed in the opening hand wheel 18, the opening hand wheel 18 is sleeved on the right end of the driving shaft 16, the opening hand wheel 18 is manually rotated to drive the driving shaft 16 to rotate, the valve core 14 is enabled to rotate in the valve core mounting hole and drive the arc-shaped limiting table 17 to upwards rotate along with the valve core 14, when the arc-shaped limiting table 17 is screwed up to be separated from the blocking pin 5, the blocking pin 5 is turned downwards clockwise, the blocking is removed; when the plugging of the rubber plug needs to be reset, the handle 8 is indicated to rotate by only manually rotating the reverse-time rotating needle until the stop pin 5 is horizontal, and then the driving shaft 16 is manually rotated to enable the arc-shaped limiting table 17 to rotate downwards in the opposite direction for resetting, so that the arc-shaped limiting table 17 can horizontally limit and lock the stop pin 5; convenient operation, time saving and labor saving.
As shown in fig. 1 and 2, a rotating shaft mounting hole is formed in a sidewall of the cement head body 1 corresponding to the left position of the grouting passage, the rotating shaft 6 is inserted into the rotating shaft mounting hole, sealing rings 10 capable of forming a seal with the rotating shaft mounting hole are respectively arranged at two ends of the rotating shaft 6, the middle part of the rotating shaft 6 is polygonal and is located in the accommodating groove, a polygonal hole 11 which is matched with the middle part of the polygonal rotating shaft 6 and is penetrated in the front and back direction is arranged at the left end of the stop pin 5, and the middle part of the rotating shaft 6 is arranged in the polygonal hole 11 of the stop pin. According to the requirement, the rear end aperture of the rotating shaft mounting hole is larger than the front end aperture, the front end aperture of the rotating shaft 6 is smaller than the rear end aperture, the maximum width of the middle part of the polygonal rotating shaft 6 is smaller than the rear end aperture of the rotating shaft mounting hole, when the rotating shaft 6 needs to be maintained or replaced, only the fastening nut 7 needs to be dismounted from the rotating shaft 6, and the rotating shaft 6 is pulled out from the cement head body 1 to the rear; the mechanical seal of the present invention can be ensured by providing the seal ring 10.
As shown in fig. 1, a rectangular pyramid platform hole 12 which is through from left to right and is small in left and large in right is formed in the wall of the cementing head body 1 corresponding to the middle position of the rotating shaft 6, a rectangular pyramid platform 13 which is matched with the rectangular pyramid platform hole 12 is formed in the rectangular pyramid platform hole 12 corresponding to the left position of the middle of the rotating shaft 6, and a receiving groove for receiving the blocking pin 5 is formed by the right side wall of the rectangular pyramid platform 13 and the inner wall of the rectangular pyramid platform hole 12 in a surrounding manner. According to needs, carry out seal welding to four pyramid terrace 13 and four pyramid terrace hole 12 junction, form the holding tank through cooperating four pyramid terrace 13 and four pyramid terrace hole 12, be convenient for process and easy to assemble.
As shown in fig. 1, 2 and 3, the cementing head body 1 is a hollow rectangular tubular structure, and a cylindrical grouting passage which penetrates up and down is formed inside the cementing head body 1. The cement head body 1 is in a cuboid structure, so that grooving or hole opening can be conveniently carried out on the cement head body 1, the aim of bearing higher pressure can be fulfilled by increasing the wall thickness of the grooving or hole opening, and the requirement of high-pressure well cementation operation is met.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (8)
1. A high-pressure well cementation cement head is characterized by comprising a cement head body, an upper barrel, a quick connector, a union connector and a stop pin assembly, wherein a vertically through grouting channel is arranged in the cement head body, the upper end of the cement head body is fixedly connected with the upper barrel, the lower end of the cement head body is fixedly connected with the quick connector, the middle part of the outer side wall of the cement head body is in threaded connection with the union connector communicated with the grouting channel, the threaded connection part of the union connector and the cement head body is welded together, the stop pin assembly is arranged on the cement head body corresponding to the position above the union connector and comprises a stop pin, a rotating shaft, a fastening nut and an indicating rotating handle, the rotating shaft which is horizontally arranged from front to back is installed on the wall of the cement head body corresponding to the left side of the grouting channel in a penetrating and rotating mode, and an accommodating groove is arranged on the inner wall, the backing pin is located union connector top and is about and sets up in the slip casting passageway to the level, the backing pin left end extends to in the holding tank and can dismantle fixed connection with the rotation axis middle part, the backing pin can be when the rotation axis clockwise turning during to overturn and get into the holding tank, threaded connection has the backing pin control valve assembly on the cement head body of corresponding backing pin right side position, the welding of threaded connection department of backing pin control valve assembly and cement head body is in the same place, the rotation axis outside threaded connection who corresponds cement head body the place ahead position has fastening nut, the rotation axis outside that corresponds cement head body rear position is equipped with the instruction and rotates the handle.
2. The high-pressure well cementing head of claim 1, wherein the stop pin control valve assembly comprises a cylindrical valve body, wherein outer threads are arranged on the outer sides of both ends of the valve body, a valve core is arranged in the valve body, an arc-shaped stop platform protruding leftward is arranged at the lower end of the left side of the valve core, a driving shaft is fixedly arranged in the middle of the right end of the valve core, a fixing end cover capable of horizontally moving and limiting the valve core is connected to the outer side of the right end of the valve body in a threaded manner, the fixing end cover is sleeved on the driving shaft, an opening hand wheel capable of transmitting torque is arranged on the driving shaft corresponding to the right side of the fixing end cover, a valve core mounting hole penetrating left and right is arranged on the wall of the cement head body corresponding to the right side of the stop pin, a threaded hole matched with the outer threads at the left end of the valve body, the right end of the stop pin is lapped on the concave cambered surface at the upper end of the cambered limiting platform.
3. The high-pressure well cementing cement head according to claim 1 or 2, characterized in that a rotating shaft mounting hole is provided on the wall of the cement head body corresponding to the left position of the grouting channel, the rotating shaft is inserted into the rotating shaft mounting hole, both ends of the rotating shaft are provided with sealing rings capable of forming sealing with the rotating shaft mounting hole, the middle part of the rotating shaft is polygonal and is positioned in the accommodating groove, the left end of the stop pin is provided with a polygonal hole which is matched with the middle part of the polygonal rotating shaft and is penetrated from front to back, and the middle part of the rotating shaft is installed in the polygonal hole of the stop pin.
4. The high-pressure well cementing cement head according to claim 1 or 2, characterized in that a rectangular pyramid hole which is through from left to right and is small in left and large in right is provided on the wall of the cement head body corresponding to the middle position of the rotating shaft, a rectangular pyramid matched with the rectangular pyramid hole is provided in the rectangular pyramid hole corresponding to the left position of the middle position of the rotating shaft, and a receiving groove for receiving the stop pin is defined by the right side wall of the rectangular pyramid and the inner wall of the rectangular pyramid hole.
5. The high-pressure well cementing cement head according to claim 3, characterized in that a rectangular pyramid hole which is through from left to right and is smaller from left to right and larger from left to right is provided on the cement head body wall corresponding to the middle position of the rotating shaft, a rectangular pyramid matched with the rectangular pyramid hole is provided in the rectangular pyramid hole corresponding to the left position of the middle position of the rotating shaft, and a receiving groove for receiving the stop pin is enclosed by the right side wall of the rectangular pyramid and the inner wall of the rectangular pyramid hole.
6. The high-pressure well cementation cement head as claimed in claim 1, 2 or 5, wherein the cement head body is a hollow rectangular cylinder structure, and a cylindrical grouting channel which is communicated up and down is formed inside the cement head body.
7. The high-pressure well cementation cement head as claimed in claim 3, wherein the cement head body is a hollow rectangular cylinder structure, and a cylindrical grouting channel is formed inside the cement head body and penetrates up and down.
8. The high-pressure well cementation cement head as claimed in claim 4, wherein the cement head body is a hollow rectangular cylinder structure, and a cylindrical grouting channel which is communicated with the inside of the cement head body is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011429229.9A CN112253043A (en) | 2020-12-09 | 2020-12-09 | High-pressure well cementing cement head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011429229.9A CN112253043A (en) | 2020-12-09 | 2020-12-09 | High-pressure well cementing cement head |
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| CN112253043A true CN112253043A (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011429229.9A Pending CN112253043A (en) | 2020-12-09 | 2020-12-09 | High-pressure well cementing cement head |
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