CN117418805B - Intelligent self-locking casing head device and pressure control system - Google Patents
Intelligent self-locking casing head device and pressure control system Download PDFInfo
- Publication number
- CN117418805B CN117418805B CN202311734255.6A CN202311734255A CN117418805B CN 117418805 B CN117418805 B CN 117418805B CN 202311734255 A CN202311734255 A CN 202311734255A CN 117418805 B CN117418805 B CN 117418805B
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- casing head
- hydraulic oil
- head body
- hanger
- locking
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- 239000010720 hydraulic oil Substances 0.000 claims abstract description 101
- 239000003921 oil Substances 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 230000002159 abnormal effect Effects 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000002474 experimental method Methods 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
-
- 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
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Emergency Management (AREA)
- Fluid Mechanics (AREA)
- Geology (AREA)
- Business, Economics & Management (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an intelligent self-locking casing head device and a pressure control system, which relate to the technical field of casing heads and comprise a casing head body, wherein an installation cavity penetrates through the middle position of the inner side of the casing head body, a hydraulic oil cavity is formed in the side surface, close to the installation cavity, of the casing head body, a connecting flange is arranged at the top of the casing head body, a hanger is arranged in the installation cavity, the casing head body provides clamping force for the hanger through oil pressure of the hydraulic oil cavity, and a control structure is arranged on the outer side surface of the casing head body and is used for sealing the hydraulic oil cavity when the hanger is installed; the greater the extrusion force of the self-locking bolt is, the more firm the hanger is, the firmness of the hanger is directly related to the pressure at one end of the inner side of the casing head body, so that the safety can be provided for the hanger, the larger pressure impact is suddenly received at one end of the inner side of the casing head body, the stability of the hanger can still be ensured, the hanger has an explosion-proof effect, and the safety of the casing head body is improved.
Description
Technical Field
The invention relates to the technical field of casing heads, in particular to an intelligent self-locking casing head device and a pressure control system.
Background
The casing head is used for fixing a wellhead of a drilling well, connecting a wellhead casing string, supporting the gravity of a technical casing and an oil layer casing, sealing an annular space between each layer of pipes, providing transitional connection for installing a blowout preventer, a tubing head and a christmas tree, and performing construction operations such as slurry supplementing, monitoring, balance liquid filling and the like through two side ports on a casing head body;
the existing self-locking casing head device is disclosed as a self-locking casing head disclosed in China patent with application publication number of CN113006731A and an automatic locking casing head disclosed in China patent with application publication number of CN116122760A, and the following problems exist in the self-locking casing head:
the connection between the hanger and the casing head is not ensured through threaded connection, and the tightness is not ensured because the hanger and the casing head generate stronger vibration when carrying out construction operations such as replenishing and squeezing slurry, monitoring and filling balance liquid, petroleum, natural gas exploitation and the like, and the connection in a threaded mode is easy to loosen, so that the connection strength between the hanger and the casing head is influenced;
the bottom of casing head contacts with the oil reservoir, and contains a large amount of volatile gas in the oil reservoir, so the phenomenon of blowout takes place easily for the one end that the casing head is close to the oil reservoir, but the connection tightness between hanger and the casing head can not be controlled according to the pressure that the casing head bottom received, leads to the hanger tightness in the casing head not enough, causes the accident.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide an intelligent self-locking casing head device and a pressure control system, so as to solve the problems that in the prior art, because the bottom of the casing head is contacted with an oil reservoir and the oil reservoir contains a large amount of volatile gas, blowout phenomenon easily occurs at one end of the casing head, which is close to the oil reservoir, but the connection tightness between a hanger and the casing head cannot be controlled according to the pressure received by the bottom end of the casing head, so that the hanger in the casing head is insufficient in tightness.
The aim of the invention can be achieved by the following technical scheme:
the utility model provides an intelligence is from locking casing head device, including the casing head body, inboard intermediate position runs through there is the installation cavity, the hydraulic oil chamber has been seted up to the side that the inside of casing head body is close to the installation cavity, top at the casing head body is equipped with flange, be equipped with the hanger in the installation cavity, the casing head body provides clamping force for the hanger through the oil pressure of hydraulic oil chamber, lateral surface at the casing head body is equipped with control structure, control structure is used for sealing hydraulic oil chamber when the hanger is installed, control structure is used for deblocking hydraulic oil chamber when the hanger is demolishd.
As a further scheme of the invention: the number of the hydraulic oil cavities is at least three, the hydraulic oil cavities are distributed on the outer side of the installation cavity in an annular mode, and the positions of the control structures correspond to the positions of the hydraulic oil cavities one by one.
As a further scheme of the invention: the top of the hydraulic oil cavity is provided with a self-locking piston, the bottom of the hydraulic oil cavity is provided with a pressure piston, the middle position of one side of the hydraulic oil cavity, which is close to the installation cavity, is provided with at least two self-locking bolts, and the side surface of the hanger, which corresponds to the position of the self-locking bolts, is provided with a locking groove matched with the self-locking bolts.
As a further scheme of the invention: at least two self-locking spring bolts are obliquely arranged and symmetrically arranged on the radial surface of the casing head body.
As a further scheme of the invention: the bottom surface of flange is close to the position fixedly connected with ejector pad of auto-lock piston.
As a further scheme of the invention: and a control plug is arranged on one side of the hydraulic oil cavity, which is far away from the mounting cavity, and a limiting ring is nested at the position, close to the control plug, of the outer side surface of the casing head body.
As a further scheme of the invention: the control structure comprises a control rod, a gear is fixedly connected to the top end of the control rod, the gear is arranged on the outer side face of the casing head body through a rotating shaft, tooth grooves distributed along the axis of the limiting ring are formed in the side face of the limiting ring, and the gear is meshed with the tooth grooves.
As a further scheme of the invention: the side surface of one end of the control plug, which is close to the hydraulic oil cavity, is fixedly connected with an anti-drop cap, the end surface of one end of the control plug, which is close to the anti-drop cap, is provided with an oil delivery groove, the side surface of the other end of the control plug is provided with an external hole, and the oil delivery groove is communicated with the external hole.
As a further scheme of the invention: and an elastic block is arranged at one side of the control rod and close to the bottom surface of the limiting ring.
The pressure control system of intelligence self-locking casing head device, it uses foretell intelligence self-locking casing head device to realize, includes:
the control module is arranged on the casing head body, acquires the oil pressure value of the hydraulic oil cavity, compares the oil pressure value with a preset working threshold range, and outputs an abnormal state, a working state or an alarm state;
the alarm module is arranged on the casing head body, reads the abnormal state, the working state or the alarm state output by the control module, converts the abnormal state, the working state or the alarm state into an electric signal and transmits the electric signal to the back-end PC through a wireless network.
The invention has the beneficial effects that:
according to the invention, the hydraulic oil cavity is arranged in the casing head body, the pressure piston at the bottom end of the hydraulic oil cavity is directly contacted with the bottom surface of the installation cavity, when the casing head body is impacted by the pressure of a large drilling wellhead, namely, the pressure at the inner side of the casing head body suddenly rises, the pressure piston at the bottom end of the hydraulic oil cavity is directly contacted with the bottom surface of the installation cavity, so that the pressure piston can be directly acted by the pressure of the inner side of the casing head body, the oil pressure of hydraulic oil in the inner cavity of the hydraulic oil cavity is improved, the larger the acting force of the self-locking bolt on the side surface of the hanger is according to the principle of the communicating vessel, the larger the extrusion force of the self-locking bolt on the hanger is ensured, the hanger is enabled to be more firm, the firmness of the hanger is enabled to be directly related to the pressure of one end of the inner side of the casing head body, and the hanger is suddenly impacted by the large pressure at one end of the inner side of the casing head body, the stability of the hanger is still enabled to be ensured, the hanger has an explosion-proof effect, and the safety of the casing head body is improved.
2. According to the invention, through the control structure arranged on the outer side of the casing head body, after the control plug is automatically popped up in the moving groove under the action of hydraulic oil pressure in the hydraulic oil cavity, the external connection hole on the control plug can be moved out of the moving groove, so that the hydraulic oil in the hydraulic oil cavity can be discharged into the external environment through the oil conveying groove and the external connection hole, the hydraulic oil in the hydraulic oil cavity is released, the hydraulic oil in the hydraulic oil cavity is ensured to be in a normal pressure state, the self-locking lock tongue can be automatically separated from the locking groove on the side surface of the hanger, a return spring can be arranged at one end of the self-locking lock tongue, which is far away from the hanger, when the hydraulic oil in the hydraulic oil cavity is in the normal pressure state, the elasticity of the return spring can act on the self-locking lock tongue, the self-locking lock tongue is automatically retracted into the sliding groove, the contact with the locking groove on the side surface of the hanger is separated, the hanger can be ensured to be normally taken out from the casing head body, and the dismounting difficulty of the hanger is reduced.
3. According to the invention, through the pressure control system, the control module transmits signals of an abnormal state, a working state or an alarm state to the alarm module, the alarm module transmits the signals of the abnormal state, the working state or the alarm state to the back-end PC through the wireless network, the wireless network can adopt 2G, 3G, 4G, 5G, wiFi or a local area network, a worker can directly acquire the state of the casing head body through the back-end PC, and the casing head body in the abnormal state or the alarm state is overhauled in time, so that accidents are avoided.
4. According to the invention, the self-locking bolts are obliquely arranged and symmetrically arranged on the radial surface of the casing head body, so that the self-locking bolts can apply forces in different directions to the hanger, and according to force decomposition, the hanger can receive two forces in opposite directions along the axial direction of the mounting cavity and the radial extrusion force of the mounting cavity, thereby enabling the position of the hanger to be more stable.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of the invention with the casing head body separated from the coupling flange;
FIG. 2 is a cross-sectional view of the coupling head body of the present invention mated with a coupling flange;
FIG. 3 is a cross-sectional view of the casing head body of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a front view of a connecting flange of the present invention;
FIG. 6 is a cross-sectional view of the hanger of the present invention;
FIG. 7 is a cross-sectional view of a control structure in accordance with the present invention;
FIG. 8 is a schematic view of the structure of a control plug of the present invention;
FIG. 9 is a flow chart of a pressure control system of the present invention.
In the figure: 1. a casing head body; 11. bolt holes; 12. a mounting cavity; 13. a hydraulic oil chamber; 14. self-locking lock tongue; 15. a control plug; 151. an anti-drop cap; 152. an oil delivery groove; 153. an external hole; 16. a support spring; 17. a self-locking piston; 18. a pressure piston; 19. a limiting ring; 2. a connecting flange; 21. a nut hole; 22. an external cavity; 23. a blocking groove; 24. a pushing block; 3. a hanger; 31. a communication chamber; 32. a blocking piece; 33. a locking groove; 4. a control structure; 41. a control lever; 42. a gear; 43. a spring block; 44. a handle.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1 and 2, the invention discloses an intelligent self-locking casing head device, which comprises a casing head body 1, wherein an installation cavity 12 penetrates through the middle position of the inner side of the casing head body 1, a hydraulic oil cavity 13 is formed in the side surface, close to the installation cavity 12, of the casing head body 1, a connecting flange 2 is arranged at the top of the casing head body 1, a hanger 3 is arranged in the installation cavity 12, the casing head body 1 provides clamping force for the hanger 3 through oil pressure of the hydraulic oil cavity 13, a control structure 4 is arranged on the outer side surface of the casing head body 1, the control structure 4 is used for sealing the hydraulic oil cavity 13 when the hanger 3 is installed, and the control structure 4 is used for unsealing the hydraulic oil cavity 13 when the hanger 3 is removed;
it should be noted that, the casing head body 1 is fixed at the wellhead, then the hanger 3 is placed in the mounting cavity 12, finally the casing head body 1 and the connecting flange 2 are connected through bolts, as shown in fig. 3, a plurality of bolt holes 11 are formed in the side surface of the casing head body 1 for inserting bolts, as shown in fig. 5, a plurality of nut holes 21 are formed in the side surface of the connecting flange 2 for placing nuts, when the connecting flange 2 covers the top surface of the casing head body 1, the bolt holes 11 are aligned with the nut holes 21, then bolts are inserted into the bolt holes 11, nuts are placed into the nut holes 21, and finally the bolts and the nuts are screwed up, so that the assembly of the casing head body 1 is completed;
in the process of fastening connection of the casing head body 1 and the connecting flange 2, the connecting flange 2 can apply pressure to the hydraulic oil cavity 13, so that hydraulic oil in the hydraulic oil cavity 13 is in a high-pressure state, then the high-pressure hydraulic oil cavity 13 can act on the side face of the hanger 3, locking of the hanger 3 is achieved, the hanger 3 can be automatically locked, arrangement of the casing head body 1 is completed, an external pipeline can be communicated with the hanger 3 through an external cavity 22 formed in the connecting flange 2, and operations such as oil pumping and liquid injection are completed.
The quantity of the hydraulic oil chambers 13 is three at least groups, and is annular and distributes in the outside of installation cavity 12, and the position of control structure 4 and the position one-to-one of hydraulic oil chambers 13 are corresponding, and three hydraulic oil chambers 13 can guarantee that the side of hanger 3 receives the atress of three direction, guarantees on the one hand that the side atress of hanger 3 is even, makes hanger 3 be in the center of installation cavity 12, and on the other hand, three stress points can provide the stability of hanger 3, guarantees that hanger 3 can not take place the shake at the in-process of transmission raw materials.
As shown in fig. 3, fig. 4 and fig. 6, the top end of the hydraulic oil cavity 13 is provided with a self-locking piston 17, the bottom end of the hydraulic oil cavity 13 is provided with a pressure piston 18, the middle position of one side of the hydraulic oil cavity 13, which is close to the mounting cavity 12, is provided with at least two self-locking lock bolts 14, the side surface of the hanger 3 is provided with a locking groove 33 matched with the self-locking lock bolts 14 corresponding to the position of the self-locking lock bolts 14, as shown in fig. 5, the bottom surface of the connecting flange 2 is fixedly connected with a push block 24, the position of an external cavity 22, which is close to the inner side of the connecting flange 2, is provided with a blocking groove 23, the position, which is close to the blocking groove 23, of the top end of the hanger 3 is provided with a blocking block 32 mutually matched with the blocking groove 23, when the connecting flange 2 is pressed at the top end of the hanger 3, the blocking block 32 and the blocking groove 23 are mutually matched, the position of the hanger 3 along the axis direction of the connecting flange 2 is limited, the inner side of the hanger 3 is provided with a communicating cavity 31, and the communicating cavity 31 is used for connecting an external pipeline and an oil well at the bottom end of the casing head body 1, and can be used for transporting oil gas or balance liquid;
when the connecting flange 2 is arranged on the top surface of the casing head body 1, as the push block 24 is fixedly connected to the position, close to the self-locking piston 17, of the bottom surface of the connecting flange 2, the push block 24 acts on the top surface of the self-locking piston 17, so that the self-locking piston 17 can overcome the elasticity of the supporting spring 16 arranged on the bottom surface of the self-locking piston 17 and the hydraulic oil resistance of the hydraulic oil cavity 13, the downward-moving self-locking piston 17 can squeeze the hydraulic oil in the hydraulic oil cavity 13, so that the hydraulic oil is in a high-pressure state, the hydraulic oil in the hydraulic oil cavity 13 can act on the self-locking spring bolt 14, so that the self-locking spring bolt 14 can move to the side of the mounting cavity 12, and after the push block 24 drives the self-locking piston 17 downwards, the position between the connecting flange 2 and the casing head body 1 is fixed through bolts, so that the self-locking piston 17 can be ensured to continuously act on the hydraulic oil in the hydraulic oil cavity 13 through the push block 24, the hydraulic oil pressure in the hydraulic oil cavity 13 is ensured, and when the connecting flange 2 is separated from the casing head body 1, namely, under the condition that the lower hanger 3 is required, the supporting spring 16 acts on the bottom surface of the self-locking piston 17, so that the self-locking piston 17 can be rebounded, and the self-locking piston 17 can be rebounded;
a chute matched with the self-locking lock tongue 14 is formed in the side surface of the hydraulic oil cavity 13 near the self-locking lock tongue 14, so that the self-locking lock tongue 14 can slide freely in the chute, the self-locking lock tongue 14 is connected with the chute in a sealing sliding manner, and hydraulic oil in the hydraulic oil cavity 13 is prevented from leaking, namely, when the connecting flange 2 is separated from the casing head body 1, the supporting spring 16 acts on the bottom surface of the self-locking piston 17, so that the self-locking piston 17 slides upwards along the chute wall of the chute and returns to the initial position;
since the hanger 3 is disposed in the mounting cavity 12, and the side surface of the hanger 3 is provided with the locking groove 33 matching with the self-locking bolt 14 corresponding to the position of the self-locking bolt 14, when the self-locking bolt 14 moves to one side of the mounting cavity 12, the self-locking bolt 14 is embedded into the locking groove 33, thereby realizing the locking of the hanger 3.
As shown in fig. 3, two or more self-locking bolts 14 are all inclined and symmetrically arranged on the radial surface of casing head body 1, so that all self-locking bolts 14 apply forces in different directions to hanger 3, and hanger 3 is subjected to two forces in opposite directions along the axial direction of mounting cavity 12 and the radial extrusion force of mounting cavity 12 according to force decomposition, thereby making the position of hanger 3 more stable;
when the casing head body 1 is tightly connected with the connecting flange 2 through bolts, the self-locking lock tongue 14 can automatically lock the hanger 3, as shown in fig. 3, the pressure piston 18 at the bottom end of the hydraulic oil cavity 13 is directly contacted with the bottom surface of the mounting cavity 12, when the casing head body 1 is impacted by the larger pressure of the drilling wellhead, namely the pressure at the inner side of the casing head body 1 suddenly rises, the pressure piston 18 at the bottom end of the hydraulic oil cavity 13 is directly contacted with the bottom surface of the mounting cavity 12, the pressure piston 18 can be directly contacted with the pressure at the inner side of the casing head body 1, so that the oil pressure of hydraulic oil in the inner cavity of the hydraulic oil cavity 13 is improved, the larger the acting force of the self-locking lock tongue 14 to the side surface of the hanger 3 is according to the principle of a communicating vessel, the larger the extrusion force of the hanger 3 by the self-locking lock tongue 14 is ensured, and the hanger 3 is firmer;
in a word, the fastness of hanger 3 and the pressure of the inboard one end of casing head body 1 are direct to can provide the insurance for hanger 3, receive great pressure shock suddenly at the inboard one end of casing head body 1, still can guarantee the stability of hanger 3, make hanger 3 possess explosion-proof effect, promoted the security of casing head body 1.
Example 2
As shown in fig. 3 and 4, a control plug 15 is arranged on one side of the hydraulic oil cavity 13 away from the mounting cavity 12, and a limit ring 19 is nested at the position, close to the control plug 15, of the outer side surface of the casing head body 1;
it should be noted that, the position that is close to control plug 15 in casing head body 1 sets up the removal groove that mutually agrees with control plug 15, guarantee that control plug 15 can freely move in the removal groove, control plug 15 and removal groove sealing sliding connection, guarantee that hydraulic oil in the hydraulic oil chamber 13 can not leak when control plug 15 slides in the removal groove, the inside diameter of spacing ring 19 equals with the outside diameter of casing head body 1, guarantee like this that spacing ring 19 can freely slide along the axis direction of casing head body 1 at the side of casing head body 1, when spacing ring 19 card in the end position of control plug 15, just can restrict the position of control plug 15, make control plug 15 card seal up hydraulic oil chamber 13 in the removal groove, guarantee that hydraulic oil in the hydraulic oil chamber 13 can not take place to leak.
As shown in fig. 3 and 7, the control structure 4 comprises a control rod 41, a gear 42 is fixedly connected to the top end of the control rod 41, the gear 42 is arranged on the outer side surface of the casing head body 1 through a rotating shaft, tooth grooves distributed along the axis of the limiting ring 19 are formed in the side surface of the limiting ring 19, and the gear 42 is meshed with the tooth grooves;
it should be noted that, the position of the limiting ring 19 can be limited by the control rod 41 through the gear 42, so that the limiting ring 19 is stabilized at one end of the outer side of the control plug 15, the control plug 15 is guaranteed not to slide in the moving groove, when the hanger 3 is required to be detached, the control rod 41 only needs to rotate upwards, the upward rotating control rod 41 drives the gear 42 to rotate, the gear 42 is meshed with the gear groove distributed along the axis of the limiting ring 19 due to the fact that the gear groove is formed in the side face of the limiting ring 19, the limiting ring 19 is driven to move downwards by the rotating gear 42, and the number of the control structures 4 is consistent with that of the hydraulic oil cavities 13, so that the limiting ring 19 can be guaranteed to move downwards due to the fact that the control structures 4 must rotate upwards at the same time, the additional protection effect is provided for limiting the limiting ring 19, after the limiting ring 19 moves downwards, the limiting ring 15 is separated from contact with the control plug 15, and the control plug 15 can pop up automatically in the moving groove under the action of hydraulic oil pressure in the hydraulic oil cavity 13.
As shown in fig. 8, a drop-proof cap 151 is fixedly connected to one end side surface of the control plug 15, which is close to the hydraulic oil cavity 13, an oil delivery groove 152 is formed in one end surface of the control plug 15, which is close to the drop-proof cap 151, an external connection hole 153 is formed in the other end side surface of the control plug 15, and the oil delivery groove 152 is communicated with the external connection hole 153;
specifically, when the control plug 15 is automatically popped up in the moving groove under the action of the hydraulic oil pressure in the hydraulic oil cavity 13, the external connection hole 153 on the control plug 15 can be moved out of the moving groove, so that the hydraulic oil in the hydraulic oil cavity 13 can be discharged to the external environment through the oil delivery groove 152 and the external connection hole 153, the hydraulic oil in the hydraulic oil cavity 13 is released, the hydraulic oil in the hydraulic oil cavity 13 is ensured to be in a normal pressure state, in order to enable the self-locking bolt 14 to be automatically separated from the locking groove 33 on the side surface of the hanger 3, a return spring can be arranged at one end of the self-locking bolt 14 far away from the hanger 3, when the hydraulic oil in the hydraulic oil cavity 13 is in a normal pressure state, the elasticity of the return spring can act on the self-locking bolt 14, the self-locking bolt 14 is automatically retracted into the sliding groove, the contact with the locking groove 33 on the side surface of the hanger 3 is released, the hanger 3 is ensured to be normally taken out from the casing head body 1, and the dismounting difficulty of the hanger 3 is reduced.
As shown in fig. 3 and 7, a spring block 43 is arranged at the bottom surface of one side of the control rod 41, which is close to the limit ring 19, and one end of the spring block 43, which is close to the control rod 41, is connected with a spring, when the control rod 41 is positioned in the axial direction of the casing head body 1, the spring block 43 can be clamped at the bottom surface of the limit ring 19, so as to provide upward acting force for the limit ring 19, ensure that the limit ring 19 is stabilized at the outer side of the control plug 15, one end of the control rod 41, which is far away from the gear 42, is connected with a handle 44, and the length of the control rod 41 is prolonged by the handle 44, so that the control rod 41 can rotate more labor-effectively and conveniently.
Example 3
As shown in fig. 9, the pressure control system of the intelligent self-locking casing head device comprises:
the control module is arranged on the casing head body 1, a pressure sensor is arranged in the hydraulic oil cavity 13, the pressure sensor directly reads the pressure of hydraulic oil in the hydraulic oil cavity 13, then the pressure value of the hydraulic oil is converted into an electric signal and transmitted to the control module, a working threshold is preset in the control module, the working threshold is provided with a minimum value Min and a maximum value Max, the working threshold is determined by a person skilled in the art according to a large number of experiments, for example, the minimum value Min is 0.4MPa, and the maximum value Max is 1.6MPa;
when the control module obtains that the pressure value is within the minimum value Min and the maximum value Max, the control module outputs a signal of a working state;
when the control module obtains that the pressure value is smaller than the minimum value Min, the control module outputs a signal of an abnormal state;
when the control module obtains that the pressure value is greater than the maximum value Max, the control module outputs a signal of an alarm state;
the alarm module is arranged on the casing head body 1, reads the abnormal state, the working state or the alarm state output by the control module, converts the abnormal state, the working state or the alarm state into an electric signal and transmits the electric signal to the back-end PC through a wireless network;
specifically, the control module transmits signals of an abnormal state, a working state or an alarm state to the alarm module, the alarm module transmits signals of the abnormal state, the working state or the alarm state to the back-end PC through the wireless network, the wireless network can adopt 2G, 3G, 4G, 5G, wiFi or a local area network, a worker can directly acquire the state of the casing head body 1 through the back-end PC, and the casing head body 1 in the abnormal state or the alarm state is overhauled in time, so that accidents are avoided.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (9)
1. Intelligence self-locking casing head device, its characterized in that includes:
the middle position of the inner side of the casing head body (1) is penetrated by a mounting cavity (12), and a hydraulic oil cavity (13) is formed in the casing head body (1) and is close to the side surface of the mounting cavity (12);
the connecting flange (2) is arranged at the top of the casing head body (1);
the hanger (3) is arranged in the mounting cavity (12), and the casing head body (1) provides clamping force for the hanger (3) through oil pressure of the hydraulic oil cavity (13);
the control structure (4) is arranged on the outer side surface of the casing head body (1), and the control structure (4) is used for sealing the hydraulic oil cavity (13) when the hanger (3) is installed;
the control structure (4) is used for unsealing the hydraulic oil cavity (13) when the hanger (3) is detached;
the top of hydraulic oil pocket (13) is equipped with auto-lock piston (17), the bottom of hydraulic oil pocket (13) is equipped with pressure piston (18), and the one side middle part position that hydraulic oil pocket (13) are close to installation cavity (12) is equipped with two at least auto-lock spring bolts (14), and the lateral surface of hanger (3) corresponds auto-lock spring bolt (14) position and has seted up with auto-lock spring bolt (14) assorted locked groove (33).
2. The intelligent self-locking casing head device according to claim 1, wherein the number of the hydraulic oil chambers (13) is at least three, the hydraulic oil chambers are distributed on the outer side of the installation cavity (12) in a ring shape, and the positions of the control structures (4) are in one-to-one correspondence with the positions of the hydraulic oil chambers (13).
3. The intelligent self-locking casing head device according to claim 1, wherein at least two self-locking bolts (14) are both obliquely arranged and symmetrically arranged with respect to a radial plane of the casing head body (1).
4. The intelligent self-locking casing head device according to claim 1, wherein a push block (24) is fixedly connected to the bottom surface of the connecting flange (2) at a position close to the self-locking piston (17).
5. The intelligent self-locking casing head device according to claim 1, wherein a control plug (15) is arranged on one side, far away from the installation cavity (12), of the hydraulic oil cavity (13), and a limiting ring (19) is nested at the position, close to the control plug (15), of the outer side surface of the casing head body (1).
6. The intelligent self-locking casing head device according to claim 5, wherein the control structure (4) comprises a control rod (41), a gear (42) is fixedly connected to the top end of the control rod (41), the gear (42) is arranged on the outer side face of the casing head body (1) through a rotating shaft, tooth grooves distributed along the axis of the limiting ring (19) are formed in the side face of the limiting ring (19), and the gear (42) is meshed with the tooth grooves.
7. The intelligent self-locking casing head device according to claim 5, wherein an anti-drop cap (151) is fixedly connected to one end side surface of the control plug (15) close to the hydraulic oil cavity (13), an oil conveying groove (152) is formed in one end surface of the control plug (15) close to the anti-drop cap (151), an external connection hole (153) is formed in the other end side surface of the control plug (15), and the oil conveying groove (152) is communicated with the external connection hole (153).
8. The intelligent self-locking casing head device according to claim 6, wherein a spring block (43) is arranged on one side of the control rod (41) near the bottom surface of the limiting ring (19).
9. A pressure control system for an intelligent self-locking casing head device, implemented using the intelligent self-locking casing head device of any one of claims 1-8, comprising:
the control module is arranged on the casing head body (1), acquires an oil pressure value of the hydraulic oil cavity (13), compares the oil pressure value with a preset working threshold range, and outputs an abnormal state, a working state or an alarm state;
the alarm module is arranged on the casing head body (1), reads the abnormal state, the working state or the alarm state output by the control module, converts the abnormal state, the working state or the alarm state into an electric signal and transmits the electric signal to the back-end PC through a wireless network.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311734255.6A CN117418805B (en) | 2023-12-18 | 2023-12-18 | Intelligent self-locking casing head device and pressure control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311734255.6A CN117418805B (en) | 2023-12-18 | 2023-12-18 | Intelligent self-locking casing head device and pressure control system |
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| CN117418805A CN117418805A (en) | 2024-01-19 |
| CN117418805B true CN117418805B (en) | 2024-02-20 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201810255U (en) * | 2010-01-19 | 2011-04-27 | 中国石油集团西部钻探工程有限公司克拉玛依钻井工艺研究院 | Filling and producing dual-purpose casting head of combustion oil layer |
| CN112796698A (en) * | 2021-04-14 | 2021-05-14 | 纬达石油装备有限公司 | Mandrel type casing head and using method thereof |
| CN112878942A (en) * | 2021-02-01 | 2021-06-01 | 德州联合石油科技股份有限公司 | Self-excitation all-metal sealing high-pressure wellhead device |
| CN116122761A (en) * | 2023-03-23 | 2023-05-16 | 盐城佰信石油机械有限公司 | Self-locking casing head |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG187210A1 (en) * | 2010-07-27 | 2013-02-28 | Dril Quip Inc | Casing hanger lockdown sleeve |
| NO346636B1 (en) * | 2020-10-30 | 2022-11-07 | Ccb Subsea As | Apparatus and method for pipe hanger installation |
-
2023
- 2023-12-18 CN CN202311734255.6A patent/CN117418805B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201810255U (en) * | 2010-01-19 | 2011-04-27 | 中国石油集团西部钻探工程有限公司克拉玛依钻井工艺研究院 | Filling and producing dual-purpose casting head of combustion oil layer |
| CN112878942A (en) * | 2021-02-01 | 2021-06-01 | 德州联合石油科技股份有限公司 | Self-excitation all-metal sealing high-pressure wellhead device |
| CN112796698A (en) * | 2021-04-14 | 2021-05-14 | 纬达石油装备有限公司 | Mandrel type casing head and using method thereof |
| CN116122761A (en) * | 2023-03-23 | 2023-05-16 | 盐城佰信石油机械有限公司 | Self-locking casing head |
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| CN117418805A (en) | 2024-01-19 |
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