CN213573996U - Compensation type multipurpose annular blowout preventer - Google Patents
Compensation type multipurpose annular blowout preventer Download PDFInfo
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- CN213573996U CN213573996U CN202022505302.8U CN202022505302U CN213573996U CN 213573996 U CN213573996 U CN 213573996U CN 202022505302 U CN202022505302 U CN 202022505302U CN 213573996 U CN213573996 U CN 213573996U
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Abstract
The utility model relates to an oil well blowout preventer, concretely relates to compensation formula multipurpose annular preventer to solve current blowout preventer and have that bulky, change the gum cover complicated, with high costs, proclaim oneself the gum cover withstand voltage low, proclaim oneself the well sealing ability and can not adjust, annular space main gum cover is easy damaged, after the neck bush is held tightly to the hoop, the problem of can not seal well pressure is caused to the interior bush hole semicircle. The annular blowout preventer comprises a shell, a main rubber sleeve assembly, an auxiliary rubber sleeve assembly, a piston assembly and an oil way, wherein the shell, the main rubber sleeve assembly and the auxiliary rubber sleeve assembly are sequentially and coaxially arranged from outside to inside, the piston assembly is positioned on the inner side of the shell and arranged below the main rubber sleeve assembly and used for extruding the main rubber sleeve assembly, and the oil way is arranged on the shell and communicated with the piston assembly. The auxiliary rubber sleeve component comprises an auxiliary rubber sleeve and an auxiliary rubber sleeve framework, the auxiliary rubber sleeve is arranged on the inner side of the main rubber sleeve component, the upper end of the auxiliary rubber sleeve framework is fixedly connected with the auxiliary rubber sleeve framework, the auxiliary rubber sleeve framework is detachably connected with the upper end of the shell, and the auxiliary rubber sleeve component is used for tightly holding an oil pipe, a well repairing tool, a cable, a steel wire rope or a sucker rod under the extrusion of the main rubber sleeve component.
Description
Technical Field
The utility model relates to a preventer field, concretely relates to compensation formula multipurpose annular preventer.
Background
At present, when the oil field is repaired and tested, a wellhead must be provided with a blowout preventer, and the purpose is as follows: 1. the requirements of blowout prevention and sealing of annular openings of oil pipes, couplings and tool strings with different diameters on the wellhead are met; 2. the oil pipe and the annular space of the sleeve are prevented from upwelling and spraying out of the annular space of the wellhead; 3. scraping oil stains on the outer wall of the oil pipe to reduce the workload of cleaning the oil pipe on the ground; 4. preventing wellhead droppings from falling into the well; 5. and (5) righting the oil pipe.
The prior art generally achieves this by installing a conventional annular blowout preventer, a portable self-sealing blowout preventer, a hydraulic control blowout preventer, or a compensated annular blowout preventer at the wellhead. But the conventional annular blowout preventer has the defects of large volume, high rubber sleeve replacement cost and the like; the portable self-sealing well sealer has the defects of low pressure resistance of a self-sealing rubber sleeve, unadjustable self-sealing well sealing capability and the like; the hydraulic control blowout preventer has the defects that an annular main rubber sleeve is easy to damage, and after the inner lining is tightly embraced in the annular direction, the inner hole of the inner lining is not round, so that the blowout is not blocked; the compensation type annular blowout preventer has the defects that after the main rubber sleeve tightly holds the inner lining, the inner hole of the inner lining is out of round, so that well pressure cannot be sealed, the main rubber sleeve is replaced complicatedly, the cost is high, and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving current blowout preventer and having had that bulky, change the gum cover complicated, with high costs, from the gum cover low pressure resistance of sealing, from sealing well ability unadjustable, annular space owner gum cover is easy damaged, and after the neck bush was held tightly to the hoop, the problem of sealing well pressure can not be caused to the interior neck bush hole unroundness, and provided a compensation formula multipurpose annular preventer.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a compensating multipurpose annular blowout preventer is characterized in that:
the hydraulic oil cylinder comprises a shell, a main rubber sleeve assembly, an auxiliary rubber sleeve assembly, a piston assembly and an oil way, wherein the shell, the main rubber sleeve assembly and the auxiliary rubber sleeve assembly are coaxially arranged from outside to inside in sequence;
the auxiliary rubber sleeve component comprises an auxiliary rubber sleeve and an auxiliary rubber sleeve framework;
the auxiliary rubber sleeve is arranged on the inner side of the main rubber sleeve component, and the upper end of the auxiliary rubber sleeve is fixedly connected with the auxiliary rubber sleeve framework;
the auxiliary rubber sleeve framework is detachably connected with the upper end of the shell;
the auxiliary rubber sleeve component is used for tightly holding an oil pipe, a workover tool, a cable, a steel wire rope or a sucker rod under the extrusion of the main rubber sleeve component;
the piston assembly comprises a piston and a piston cavity, and the upper end face of the piston is in contact with the lower end face of the main rubber sleeve assembly.
Further, the inner hole aperture of the auxiliary rubber sleeve is matched with the outer diameter of an oil pipe or a well repairing tool.
Furthermore, the auxiliary rubber sleeve is sequentially divided into a large-aperture section, a first guide section, a small-aperture section and a second guide section from top to bottom;
the inner hole aperture of the large-aperture section is larger than the outer diameter of an oil pipe or a well repairing tool;
the inner hole of the first guide section is in an inverted splayed shape;
the inner hole aperture of the small-aperture section is smaller than the outer diameter of the oil pipe or the well repairing tool;
the inner hole of the second guide section is in a shape of a right Chinese character 'ba';
the main rubber sleeve component is opposite to the large-aperture section of the auxiliary rubber sleeve.
Further, the auxiliary rubber sleeve component also comprises two half-type bushing cores;
the two half-type bushing cores are arranged on the inner side of the auxiliary rubber sleeve, and the upper end of the two half-type bushing cores is clamped on the auxiliary rubber sleeve framework;
the inner hole apertures of the two half-type complementary cores are matched with the outer diameters of cables, steel wire ropes or sucker rods;
the lower ends of the auxiliary rubber sleeve and the two half type bushing cores are provided with annular plates;
the upper end face of the piston is simultaneously contacted with the lower end face of the main rubber sleeve component and the lower end face of the annular plate.
Furthermore, a centering support is arranged at the upper end of the auxiliary rubber sleeve framework;
the righting frame comprises a connecting cap and a pair of righting wheels;
the connecting cap is fixedly connected with the auxiliary rubber sleeve framework;
the pair of righting wheels are arranged on the connecting cap, and wheel grooves of the pair of righting wheels are matched with the outer diameter of the cable or the steel wire rope.
Furthermore, a ring groove structure is arranged in the shell;
the lower end of the piston is positioned in the ring groove, the lower end surface of the piston and the wall of the ring groove form a piston cavity in an enclosing mode, and the piston moves in the piston cavity along the axial direction;
the oil passage is communicated with the piston cavity.
Further, the main rubber sleeve assembly comprises a main rubber sleeve and two annular frameworks which are arranged at the upper end and the lower end of the main rubber sleeve respectively.
Furthermore, a first outer conical surface is arranged at the upper part of the outer side surface of the main rubber sleeve, and a second outer conical surface is arranged at the lower part of the outer side surface of the main rubber sleeve;
a compression ring is arranged between the upper end of the main rubber sleeve and the shell;
a first inner conical surface matched with the first outer conical surface is arranged on the lower end surface of the compression ring;
and a second inner conical surface matched with the second outer conical surface is arranged on the upper end surface of the piston.
Further, the oil path comprises an oil inlet hole and an oil outlet hole;
the inlet of the oil inlet hole is connected with the oil supply pump through the stop valve, and the outlet of the oil outlet hole is connected with the external bag type energy accumulator.
Further, the stop valve is a high-pressure rod type stop valve.
The utility model discloses compare prior art's beneficial effect is:
(1) the utility model provides a compensation formula multipurpose annular preventer has adopted main gum cover subassembly and vice gum cover subassembly matched with structure, and wherein main gum cover subassembly is used for extrudeing vice gum cover subassembly, plays supplementary sealed cohesion effect, and vice gum cover subassembly plays actual sealed cohesion and wearing and tearing effect, and this annular preventer whole volume is less, the quality is lighter, sealed well pressure range is big, the seal pressure is adjustable, main vice gum cover subassembly warp evenly, the seal pressure is reliable; the auxiliary rubber sleeve component is directly installed from the upper part of the annular blowout preventer shell, can be disassembled and replaced after being damaged, is convenient to maintain and operate, and the main rubber sleeve component is not easy to wear, so that the maintenance cost is low; meanwhile, different auxiliary rubber sleeve assemblies can be used according to different well repairing working conditions, so that the requirements of different working conditions are met to the maximum extent;
(2) the hydraulic oil drives the piston to move upwards to extrude the main rubber sleeve component, so that the main rubber sleeve component uniformly deforms and extrudes the auxiliary rubber sleeve component inwards along the radial direction, the auxiliary rubber sleeve component uniformly deforms inwards, the annular space of the oil pipe and the wellhead sleeve is sealed, and only the auxiliary rubber sleeve is in contact friction with the oil pipe in the process of taking the oil pipe off, so that the main rubber sleeve cannot be damaged, and the cost is effectively saved;
(3) the utility model can realize the functions of semi-sealing and self-sealing oil pipes, well repairing tools, sealing cables, steel wire ropes and sucker rods by matching with different auxiliary rubber sleeve components;
(4) the utility model discloses in, the entry of inlet port is passed through the stop valve and is connected with the fuel feed pump, and the export and the outside bag formula energy storage ware of oil outlet are connected, and the hydraulic pressure of compression owner gum cover is adjustable, and sealed well pressure scope is big, and sealed reliability is high.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of a compensated multipurpose annular blowout preventer of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic view of an operating state according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram of a second embodiment of a compensated multipurpose annular blowout preventer of the present invention;
FIG. 5 is a schematic diagram of a third embodiment of a compensated multipurpose annular blowout preventer of the present invention;
FIG. 6 is a schematic view of the compensated multipurpose annular blowout preventer of the present invention in connection with a feed pump and a bladder accumulator;
fig. 7 is a side view of fig. 6 (the oil supply pump is not shown).
In the figure, 1-shell, 101-shell body, 102-flange;
2-main rubber sleeve component, 201-main rubber sleeve, 202-annular framework;
3-auxiliary rubber sleeve component 311-auxiliary rubber sleeve skeleton 312-auxiliary rubber sleeve; 321-an auxiliary rubber sleeve framework, 322-an auxiliary rubber sleeve, 3221-a large-aperture section, 3222-a first guide section, 3223-a small-aperture section and 3224-a second guide section; 331-an auxiliary rubber sleeve framework, 332-an auxiliary rubber sleeve, 333-two half-half type bushing cores and 334-an annular plate;
4-piston assembly, 401-piston, 402-piston cavity;
501-oil inlet hole, 502-oil outlet hole;
6-pressing a ring; 7-a stop valve;
8-a righting frame, 801-a righting wheel and 802-a connecting cap;
9-an oil supply pump; 10-bladder accumulator; 11-an annular blowout preventer;
12-connecting frame component, 121-first connecting frame, 122-second connecting frame, 123-hoop and 124-base.
Detailed Description
To further clarify the objects, advantages and features of the present invention, a compensating multi-purpose annular blowout preventer as set forth in the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
The utility model provides an annular preventer of compensation formula multipurpose includes by outer casing, main gum cover subassembly, the vice gum cover subassembly of coaxial setting in proper order to interior, is located the casing inboard and sets up the piston assembly who is used for extrudeing main gum cover subassembly in main gum cover subassembly below to and set up on the casing and with the oil circuit of piston assembly intercommunication. The oil is supplied to the piston assembly through the oil way, the piston assembly extrudes the main rubber sleeve assembly, the main rubber sleeve assembly is extruded to deform, and then the auxiliary rubber sleeve assembly is extruded, so that the auxiliary rubber sleeve assembly is further deformed, an oil pipe, a well repairing tool, a cable, a steel wire rope or a sucker rod is tightly held, and the sealing effect is realized. The structural forms of the above components are many, especially the sub-rubber sleeve component, different purposes can be realized through different structural forms, and the following is specifically described by three embodiments.
Example one
As shown in fig. 1, 2 and 3, the annular blowout preventer comprises a housing 1, a main rubber sleeve assembly 2 and an auxiliary rubber sleeve assembly 3 which are coaxially arranged from outside to inside in sequence, a piston assembly 4 which is located on the inner side of the housing 1 and arranged below the main rubber sleeve assembly 2 and used for extruding the main rubber sleeve assembly 2, and an oil path which is arranged on the housing 1 and communicated with the piston assembly 4.
In this embodiment, the housing 1 includes a housing body 101 and a flange 102 disposed at an upper end of the housing body 101, and the interior of the housing 1 is vertically penetrated.
The main rubber sleeve component 2 is sleeved on the inner side of the shell body 101 and comprises a main rubber sleeve 201 and two annular frameworks 202 arranged at the upper end and the lower end of the main rubber sleeve 201 respectively, wherein the two annular frameworks 202 and the main rubber sleeve 201 are of an integral structure. The main gum cover 201 is internally provided with an inner hole which is communicated up and down, and the two annular frameworks 202 at the upper end and the lower end of the main gum cover 201 can enhance the pressure resistance of the main gum cover 201 and prolong the service life of the main gum cover 201.
The auxiliary rubber sleeve component 3 comprises an auxiliary rubber sleeve 312 and an auxiliary rubber sleeve framework 311, the auxiliary rubber sleeve 312 is sleeved on the inner side of the main rubber sleeve component 2, namely the auxiliary rubber sleeve 312 is sleeved in an inner hole of the main rubber sleeve 201, the upper end of the auxiliary rubber sleeve 312 is fixedly connected with the auxiliary rubber sleeve framework 311, and the auxiliary rubber sleeve framework 311 is in threaded connection with the flange 102. An inner hole which is through up and down is arranged inside the auxiliary rubber sleeve 312, and the aperture of the inner hole is matched with the outer diameter of an oil pipe or a workover tool. The auxiliary rubber sleeve 312 is made of an elastic material with wear resistance and high strength, such as polyurethane, so that the service life of the auxiliary rubber sleeve can be effectively prolonged.
The piston assembly 4 comprises a piston 401 and a piston cavity 402, the piston 401 is of an annular structure and is sleeved on the inner side of the shell body 101, and the upper end face of the piston is in contact with the lower end face of the main rubber sleeve assembly 2; piston cavity 402 is enclosed by shell body 101 and piston 401 lower extreme face, specifically, shell body 101 is inside to be provided with the annular structure, and piston 401 lower extreme is located the annular, and piston cavity 402 is enclosed with the annular wall to its lower extreme face, and piston 401 is along axial motion in piston cavity 402.
The oil path comprises an oil inlet hole 501 and an oil outlet hole 502 which are communicated with the piston cavity 402, the inlet of the oil inlet hole 501 is connected with the oil supply pump through a stop valve 7, and the outlet of the oil outlet hole 502 is connected with the external bag type accumulator.
The oil supply pump is used for supplying hydraulic oil to the piston cavity 402, and a hand pump can be selected, because the volume of the piston cavity 402 is small, sufficient hydraulic oil can be supplied by the hand pump, an external power source is not needed by the hand pump, the hand pump can be operated manually, and the installation and the operation are simple.
When the stop valve 7 is closed, the hydraulic oil can be prevented from flowing back to enter the oil supply pump, the piston cavity 402 is kept at a constant pressure, and the auxiliary rubber sleeve 312 is ensured to hold the oil pipe tightly all the time. The stop valve 7 can be a high-pressure rod type stop valve, and the stop valve 7 of the type has more reliable performance.
The bag type accumulator is a structure with a large middle part and small upper and lower ends and is used for storing hydraulic oil discharged by a coupling or a workover tool through the inner side of the auxiliary rubber sleeve 312 when the annular blowout preventer works.
The connection structure of the annular blowout preventer, the oil supply pump and the bladder type accumulator is shown in fig. 6 and 7, the oil supply pump 9 and the bladder type accumulator 10 are respectively communicated with the annular blowout preventer 11 through hydraulic pipelines, and the annular blowout preventer 11 is connected with a hoop 123 and a base 124 on the bladder type accumulator 10 through a connecting frame assembly 12. The conventional connecting frame assembly 12 includes a first connecting frame 121 fixed to the annular blowout preventer 11 and a second connecting frame 122 connected to the hoop 123 and the base 124, and the first connecting frame 121 and the second connecting frame 122 are detachably connected, thereby facilitating disassembly and assembly of the bladder accumulator 10 and facilitating transportation.
When the annular blowout preventer 11 works, the oil supply pump 9 supplies hydraulic oil to the piston cavity 402, the piston 401 moves upwards under the driving of the hydraulic oil and extrudes the main rubber sleeve 201, so that the main rubber sleeve 201 uniformly deforms and extrudes the auxiliary rubber sleeve 312 inwards along the radial direction, and further the auxiliary rubber sleeve 312 uniformly deforms inwards, so that the oil pipe is tightly held or a well repairing tool is tightly held to realize sealing. When no oil pipe or well repairing tool exists in the well, the inner wall of the auxiliary rubber sleeve 312 is attached under the extrusion of the main rubber sleeve 201, so that the empty well is closed. Because in the process of pulling up and pulling down the oil pipe, only the auxiliary rubber sleeve 312 is in contact friction with the oil pipe, the main rubber sleeve 201 cannot be damaged, and only the damaged auxiliary rubber sleeve component 3 needs to be detached and replaced when the auxiliary rubber sleeve 312 is damaged.
In order to ensure that the primary rubber sleeve 201 deforms and extrudes the secondary rubber sleeve 312 to achieve a good sealing effect, a first outer conical surface is arranged at the upper part of the outer side surface of the primary rubber sleeve 201, and a second outer conical surface is arranged at the lower part of the outer side surface of the primary rubber sleeve 201; a compression ring 6 is further arranged between the main rubber sleeve 201 and the shell 1, and a first inner conical surface matched with the first outer conical surface is arranged on the lower end surface of the compression ring 6; the upper end surface of the piston 401 is provided with a second inner conical surface matched with the second outer conical surface. The deformation part of the main rubber sleeve 201 can be concentrated at the middle position in the vertical direction by arranging the inner conical surface and the outer conical surface which are matched with each other, so that the deformation of the main rubber sleeve 201 towards the inner side is larger under the same compression amount, the deformation of the auxiliary rubber sleeve 312 at the position is larger, and the sealing effect is better.
Example two
As shown in fig. 4, the annular blowout preventer comprises a casing 1, a main rubber sleeve assembly 2, an auxiliary rubber sleeve assembly 3, a piston assembly 4 and an oil path, wherein the casing 1, the main rubber sleeve assembly 2 and the auxiliary rubber sleeve assembly 3 are coaxially arranged in sequence from outside to inside, the piston assembly 4 is positioned on the inner side of the casing 1 and arranged below the main rubber sleeve assembly 2 and used for extruding the main rubber sleeve assembly 2, and the oil path is arranged on the casing 1 and communicated with the piston assembly 4.
In this embodiment, the housing 1 includes a housing body 101 and a flange 102 disposed at an upper end of the housing body 101, and the interior of the housing 1 is vertically penetrated.
The main rubber sleeve component 2 is sleeved on the inner side of the shell body 101 and comprises a main rubber sleeve 201 and two annular frameworks 202 arranged at the upper end and the lower end of the main rubber sleeve 201 respectively, wherein the two annular frameworks 202 and the main rubber sleeve 201 are of an integral structure. The main gum cover 201 is internally provided with an inner hole which is communicated up and down, and the two annular frameworks 202 at the upper end and the lower end of the main gum cover 201 can enhance the pressure resistance of the main gum cover 201 and prolong the service life of the main gum cover 201.
The auxiliary rubber sleeve component 3 comprises an auxiliary rubber sleeve 322 and an auxiliary rubber sleeve framework 321, the auxiliary rubber sleeve 322 is sleeved on the inner side of the main rubber sleeve component 2, namely the auxiliary rubber sleeve 322 is sleeved in an inner hole of the main rubber sleeve 201, the upper end of the auxiliary rubber sleeve is fixedly connected with the auxiliary rubber sleeve framework 321, and the auxiliary rubber sleeve framework 321 is in threaded connection with the flange 102. The auxiliary rubber sleeve 322 is axially longer, and has an inner hole therein, which is through from top to bottom, and the auxiliary rubber sleeve 322 is sequentially divided into a large-aperture section 3221, a first guide section 3222, a small-aperture section 3223, and a second guide section 3224 according to the change of the aperture and the shape of the inner hole from top to bottom. The bore diameter of the inner bore of the large bore section 3221 is slightly larger than the outer diameter of an oil pipe or a workover tool, so that the oil pipe or the workover tool can conveniently pass through; the inner hole of the first guiding section 3222 is in an inverted splayed shape, so that a coupling or a workover tool can conveniently pass through the small-bore section 3223 downwards; the aperture of the inner hole of the small-aperture section 3223 is slightly smaller than the outer diameter of the oil pipe or the workover tool, and is preferably smaller than the outer diameter of the oil pipe or the workover tool by 5-10 mm, so that the effect of holding the oil pipe or the workover tool tightly all the time to realize self-sealing is achieved; the inner hole of the second guiding section 3224 is in a shape of a regular Chinese character 'ba', so that a coupling or a workover tool can conveniently pass through the small-bore section 3223 upwards; the main rubber sleeve component 2 is over against the large-aperture section 3221 of the auxiliary rubber sleeve 322, when the small-aperture section 3223 is worn out by a certain amount, the self-sealing function is lost, at this time, the main rubber sleeve component 2 can be extruded through the piston component 4, and then the large-aperture section 3221 of the auxiliary rubber sleeve 322 is extruded, so that the large-aperture section 3221 of the auxiliary rubber sleeve 322 holds the oil pipe or the workover tool tightly, and the sealing work is continuously completed. The auxiliary rubber sleeve 322 is made of an elastic material with wear resistance and high strength, such as polyurethane, and the service life of the auxiliary rubber sleeve can be effectively prolonged.
The piston assembly 4 comprises a piston 401 and a piston cavity 402, the piston 401 is of an annular structure and is sleeved on the inner side of the shell body 101, and the upper end face of the piston is in contact with the lower end face of the main rubber sleeve assembly 2; piston cavity 402 is enclosed by shell body 101 and piston 401 lower extreme face, specifically, shell body 101 is inside to be provided with the annular structure, and piston 401 lower extreme is located the annular, and piston cavity 402 is enclosed with the annular wall to its lower extreme face, and piston 401 is along axial motion in piston cavity 402.
The oil path comprises an oil inlet hole 501 and an oil outlet hole 502 which are communicated with the piston cavity 402, the inlet of the oil inlet hole 501 is connected with the oil supply pump through a stop valve 7, and the outlet of the oil outlet hole 502 is connected with the external bag type accumulator. The stop valve 7 can be a high-pressure rod type stop valve, and the stop valve 7 of the type has more reliable performance. See, for example, example one.
When the annular blowout preventer works, in general, the small-bore section 3223 of the auxiliary rubber sleeve 322 automatically holds an oil pipe or a workover tool to realize self-sealing under the action of an elastic material of the auxiliary rubber sleeve, when the small-bore section 3223 loses a self-sealing function due to abrasion, hydraulic oil is supplied to the piston cavity 402 through the oil supply pump, the piston 401 moves upwards under the driving of the hydraulic oil and extrudes the main rubber sleeve 201, so that the main rubber sleeve 201 uniformly deforms and extrudes the large-bore section 3221 of the auxiliary rubber sleeve 322 inwards along the radial direction, and further the large-bore section 3221 of the auxiliary rubber sleeve 322 uniformly deforms inwards, so that the oil pipe or the workover tool is held tightly to realize sealing. When no oil pipe or well repairing tool exists in the well, the large-aperture section 3221 of the auxiliary rubber sleeve 322 is attached to the inner wall under the extrusion of the main rubber sleeve 201, so that the empty well is closed. Because in the process of pulling up and pulling down the oil pipe, only the auxiliary rubber sleeve 322 is in contact friction with the oil pipe, the main rubber sleeve 201 cannot be damaged, and only the damaged auxiliary rubber sleeve component 3 needs to be detached and replaced when the auxiliary rubber sleeve 322 is damaged.
In order to ensure that the primary rubber sleeve 201 deforms and extrudes the secondary rubber sleeve 322 to achieve a good sealing effect, a first outer conical surface is arranged at the upper part of the outer side surface of the primary rubber sleeve 201, and a second outer conical surface is arranged at the lower part of the outer side surface of the primary rubber sleeve 201; a compression ring 6 is further arranged between the main rubber sleeve 201 and the shell 1, and a first inner conical surface matched with the first outer conical surface is arranged on the lower end surface of the compression ring 6; the upper end surface of the piston 401 is provided with a second inner conical surface matched with the second outer conical surface. The deformation part of the main rubber sleeve 201 can be concentrated at the middle position in the vertical direction by arranging the inner conical surface and the outer conical surface which are matched with each other, so that the deformation of the main rubber sleeve 201 towards the inner side is larger under the same compression, the deformation of the auxiliary rubber sleeve 322 at the position is larger, and the sealing effect is better.
EXAMPLE III
As shown in fig. 5, the annular blowout preventer comprises a casing 1, a main rubber sleeve assembly 2, an auxiliary rubber sleeve assembly 3, a piston assembly 4 and an oil path, wherein the casing 1, the main rubber sleeve assembly 2 and the auxiliary rubber sleeve assembly 3 are coaxially arranged in sequence from outside to inside, the piston assembly 4 is positioned on the inner side of the casing 1 and arranged below the main rubber sleeve assembly 2 and used for extruding the main rubber sleeve assembly 2, and the oil path is arranged on the casing 1 and communicated with the piston assembly 4.
In this embodiment, the housing 1 includes a housing body 101 and a flange 102 disposed at an upper end of the housing body 101, and the interior of the housing 1 is vertically penetrated.
The main rubber sleeve component 2 is sleeved on the inner side of the shell body 101 and comprises a main rubber sleeve 201 and two annular frameworks 202 arranged at the upper end and the lower end of the main rubber sleeve 201 respectively, wherein the two annular frameworks 202 and the main rubber sleeve 201 are of an integral structure. The main gum cover 201 is internally provided with an inner hole which is communicated up and down, and the two annular frameworks 202 at the upper end and the lower end of the main gum cover 201 can enhance the pressure resistance of the main gum cover 201 and prolong the service life of the main gum cover 201.
The auxiliary rubber sleeve component 3 comprises an auxiliary rubber sleeve 332, two half-type bushing cores 333 and an auxiliary rubber sleeve framework 331, the auxiliary rubber sleeve 332 is sleeved on the inner side of the main rubber sleeve component 2, the two half-type bushing cores 333 are sleeved on the inner side of the auxiliary rubber sleeve 332, namely the auxiliary rubber sleeve 332 is sleeved in an inner hole of the main rubber sleeve 201, an inner hole which is communicated up and down is also formed in the auxiliary rubber sleeve 332, the two half-type bushing cores 333 are sleeved in the inner hole of the auxiliary rubber sleeve 332, the upper end of the auxiliary rubber sleeve 332 is fixedly connected with the auxiliary rubber sleeve framework 331, the upper end of the two half-type bushing cores 333 is clamped on the auxiliary rubber sleeve framework 331, the auxiliary rubber sleeve framework 331 is in threaded connection with the flange 102, and the lower ends of the auxiliary rubber sleeve 332 and the. The two-half type bushing 333 is internally provided with an inner hole which is communicated up and down, and the aperture of the inner hole is matched with the outer diameter of a cable, a steel wire rope or a sucker rod. The two-half complementary core 333 is made of wear-resistant and high-strength elastic material, such as polyurethane, and can effectively prolong the service life of the complementary core. In order to facilitate the assembly and disassembly of the two-half bushing 333, the auxiliary rubber sleeve framework 331 and the auxiliary rubber sleeve 332 may also be in two halves.
The piston assembly 4 comprises a piston 401 and a piston cavity 402, the piston 401 is sleeved on the inner side of the shell body 101, and the upper end surface of the piston 401 is simultaneously contacted with the lower end surface of the main rubber sleeve assembly 2 and the lower end surface of the annular plate 334; piston cavity 402 is enclosed by shell body 101 and piston 401 lower extreme face, specifically, shell body 101 is inside to be provided with the annular structure, and piston 401 lower extreme is located the annular, and piston cavity 402 is enclosed with the annular wall to its lower extreme face, and piston 401 is along axial motion in piston cavity 402.
The oil path comprises an oil inlet hole 501 and an oil outlet hole 502 which are communicated with the piston cavity 402, the inlet of the oil inlet hole 501 is connected with the oil supply pump through a stop valve 7, and the outlet of the oil outlet hole 502 is connected with the external bag type accumulator. The stop valve 7 can be a high-pressure rod type stop valve, and the stop valve 7 of the type has more reliable performance. See, for example, example one.
When the annular blowout preventer works, hydraulic oil is supplied into the piston cavity 402 by the oil supply pump, the piston 401 moves upwards under the driving of the hydraulic oil and extrudes the main rubber sleeve 201, the auxiliary rubber sleeve 332 and the two half-type bushing cores 333, so that the main rubber sleeve 201 uniformly deforms and extrudes the auxiliary rubber sleeve 332 radially inwards, the auxiliary rubber sleeve 332 rapidly and uniformly deforms and extrudes the two half-type bushing cores 333 inwards under the combined action of the main rubber sleeve 201 and the piston 401, and similarly, the two half-type bushing cores 333 also uniformly deform inwards, so that a cable, a steel wire rope or a sucker rod is clasped to realize sealing.
In order to ensure that the primary rubber sleeve 201 deforms and extrudes the secondary rubber sleeve 332 to achieve a good sealing effect, a first outer conical surface is arranged at the upper part of the outer side surface of the primary rubber sleeve 201, and a second outer conical surface is arranged at the lower part of the outer side surface of the primary rubber sleeve 201; a compression ring 6 is further arranged between the main rubber sleeve 201 and the shell 1, and a first inner conical surface matched with the first outer conical surface is arranged on the lower end surface of the compression ring 6; the upper end surface of the piston 401 is provided with a second inner conical surface matched with the second outer conical surface. The deformation part of the main rubber sleeve 201 can be concentrated at the middle position in the vertical direction by arranging the inner conical surface and the outer conical surface which are matched with each other, so that the deformation amount of the main rubber sleeve 201 towards the inner side is larger under the same compression amount, the deformation amount of the auxiliary rubber sleeve 332 at the position is larger, and the sealing effect is better.
In practical application, a cable or a steel wire rope enters the annular blowout preventer after being reversed by the top pulley above the annular blowout preventer, and because there may be installation errors in the centers of the top pulley and the annular blowout preventer, the cable or the steel wire rope and the inner holes of the two half-type bushing 333 are not concentric, so that the inner walls of the two half-type bushing 333 are abraded, and therefore the centering frame 8 is usually arranged at the upper end of the auxiliary rubber sleeve framework 331. The righting frame 8 comprises a connecting cap 802 and a pair of righting wheels 801, the connecting cap 802 is fixedly connected with the auxiliary rubber sleeve framework 331, the pair of righting wheels 801 are installed on the connecting cap 802, wheel grooves of the pair of righting wheels are opposite, and the pair of righting wheels are matched with the outer diameter of a cable or a steel wire rope. Before entering the annular blowout preventer, the cable or the steel wire rope is firstly straightened by the straightening wheel 801, so that the center of the cable or the steel wire rope is ensured to be superposed with the center of the inner hole of the two half-type complementary core 333, and the inner wall of the two half-type complementary core 333 is prevented from being abraded.
Claims (10)
1. A compensating multi-purpose annular blowout preventer, comprising:
the hydraulic oil cylinder comprises a shell, a main rubber sleeve assembly, an auxiliary rubber sleeve assembly, a piston assembly and an oil way, wherein the shell, the main rubber sleeve assembly and the auxiliary rubber sleeve assembly are coaxially arranged from outside to inside in sequence;
the auxiliary rubber sleeve component comprises an auxiliary rubber sleeve and an auxiliary rubber sleeve framework;
the auxiliary rubber sleeve is arranged on the inner side of the main rubber sleeve component, and the upper end of the auxiliary rubber sleeve is fixedly connected with the auxiliary rubber sleeve framework;
the auxiliary rubber sleeve framework is detachably connected with the upper end of the shell;
the auxiliary rubber sleeve component is used for tightly holding an oil pipe, a workover tool, a cable, a steel wire rope or a sucker rod under the extrusion of the main rubber sleeve component;
the piston assembly comprises a piston and a piston cavity, and the upper end face of the piston is in contact with the lower end face of the main rubber sleeve assembly.
2. The compensated multi-purpose annular blowout preventer of claim 1, wherein:
the aperture of the inner hole of the auxiliary rubber sleeve is matched with the outer diameter of an oil pipe or a well repairing tool.
3. The compensated multi-purpose annular blowout preventer of claim 1, wherein:
the auxiliary rubber sleeve is sequentially divided into a large-aperture section, a first guide section, a small-aperture section and a second guide section from top to bottom;
the inner hole aperture of the large-aperture section is larger than the outer diameter of an oil pipe or a well repairing tool;
the inner hole of the first guide section is in an inverted splayed shape;
the inner hole aperture of the small-aperture section is smaller than the outer diameter of the oil pipe or the well repairing tool;
the inner hole of the second guide section is in a shape of a right Chinese character 'ba';
the main rubber sleeve component is opposite to the large-aperture section of the auxiliary rubber sleeve.
4. The compensated multi-purpose annular blowout preventer of claim 1, wherein:
the auxiliary rubber sleeve component also comprises two half-type complementary cores;
the two half-type bushing cores are arranged on the inner side of the auxiliary rubber sleeve, and the upper end of the two half-type bushing cores is clamped on the auxiliary rubber sleeve framework;
the inner hole apertures of the two half-type complementary cores are matched with the outer diameters of cables, steel wire ropes or sucker rods;
the lower ends of the auxiliary rubber sleeve and the two half type bushing cores are provided with annular plates;
the upper end face of the piston is simultaneously contacted with the lower end face of the main rubber sleeve component and the lower end face of the annular plate.
5. The compensated multi-purpose annular blowout preventer of claim 4, wherein:
the upper end of the auxiliary rubber sleeve framework is provided with a righting frame;
the righting frame comprises a connecting cap and a pair of righting wheels;
the connecting cap is fixedly connected with the auxiliary rubber sleeve framework;
the pair of righting wheels are arranged on the connecting cap, and wheel grooves of the pair of righting wheels are matched with the outer diameter of the cable or the steel wire rope.
6. The compensated multipurpose annular blowout preventer of any one of claims 1 to 5, wherein:
a ring groove structure is arranged in the shell;
the lower end of the piston is positioned in the ring groove, the lower end surface of the piston and the wall of the ring groove form a piston cavity in an enclosing mode, and the piston moves in the piston cavity along the axial direction;
the oil passage is communicated with the piston cavity.
7. The compensated multi-purpose annular blowout preventer of claim 6, wherein:
the main rubber sleeve assembly comprises a main rubber sleeve and two annular frameworks which are arranged at the upper end and the lower end of the main rubber sleeve respectively.
8. The compensated multi-purpose annular blowout preventer of claim 7, wherein:
the upper part of the outer side surface of the main rubber sleeve is provided with a first outer conical surface, and the lower part of the outer side surface of the main rubber sleeve is provided with a second outer conical surface;
a compression ring is arranged between the upper end of the main rubber sleeve and the shell;
a first inner conical surface matched with the first outer conical surface is arranged on the lower end surface of the compression ring;
and a second inner conical surface matched with the second outer conical surface is arranged on the upper end surface of the piston.
9. The compensated multi-purpose annular blowout preventer of claim 8, wherein:
the oil way comprises an oil inlet hole and an oil outlet hole;
the inlet of the oil inlet hole is connected with the oil supply pump through the stop valve, and the outlet of the oil outlet hole is connected with the external bag type energy accumulator.
10. The compensated multi-purpose annular blowout preventer of claim 9, wherein:
the stop valve is a high-pressure rod type stop valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022505302.8U CN213573996U (en) | 2020-11-03 | 2020-11-03 | Compensation type multipurpose annular blowout preventer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022505302.8U CN213573996U (en) | 2020-11-03 | 2020-11-03 | Compensation type multipurpose annular blowout preventer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112112598A (en) * | 2020-11-03 | 2020-12-22 | 西安宇星石油机械新技术开发有限公司 | Compensation type multipurpose annular blowout preventer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112112598A (en) * | 2020-11-03 | 2020-12-22 | 西安宇星石油机械新技术开发有限公司 | Compensation type multipurpose annular blowout preventer |
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