CN108360996B - Wellhead rotating reversing blowout prevention integrated device - Google Patents
Wellhead rotating reversing blowout prevention integrated device Download PDFInfo
- Publication number
- CN108360996B CN108360996B CN201810169969.XA CN201810169969A CN108360996B CN 108360996 B CN108360996 B CN 108360996B CN 201810169969 A CN201810169969 A CN 201810169969A CN 108360996 B CN108360996 B CN 108360996B
- Authority
- CN
- China
- Prior art keywords
- hole
- wellhead
- rotary
- cylinder
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000002265 prevention Effects 0.000 title claims description 12
- 238000005553 drilling Methods 0.000 claims abstract description 139
- 239000007788 liquid Substances 0.000 claims abstract description 104
- 239000012530 fluid Substances 0.000 claims abstract description 93
- 230000007246 mechanism Effects 0.000 claims abstract description 87
- 238000007789 sealing Methods 0.000 claims abstract description 77
- 238000010008 shearing Methods 0.000 claims description 31
- 238000005192 partition Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 6
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 8
- 230000009471 action Effects 0.000 description 6
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
-
- 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
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
- E21B33/061—Ram-type blow-out preventers, e.g. with pivoting rams
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The integrated device is prevented spouting in rotatory switching-over of well head, including well head rotary seal reversing mechanism and the well head preventer that is located well head rotary seal reversing mechanism below, well head preventer top is provided with the rotation support mechanism, well head rotary seal reversing mechanism bottom fixedly connected with festival along the drilling rod of vertical direction setting, well head rotary seal reversing mechanism bottom is rotated and is connected on the rotation support mechanism, the drilling rod stretches into inside rotation support mechanism and well head preventer, be provided with in well head rotary seal reversing mechanism's inside and the drilling rod with its inside baffle that separates for drilling fluid input channel and drilling fluid output channel. The invention can avoid the pollution of the stratum caused by leakage due to large-area contact of drilling liquid and the stratum, specially designs the wellhead rotary sealing reversing mechanism which can lead the liquid inlet and the liquid outlet to rotate 180 degrees at intervals in the rotating process of the drill rod, and is integrated with a wellhead blowout preventer, so that the structure is more compact, the functions are more diversified, and the window density of the drilling fluid is reduced.
Description
Technical Field
The invention belongs to the technical field of oil and gas well exploitation, and particularly relates to a wellhead rotating reversing blowout prevention integrated device.
Background
At present, a wellhead rotary guider applied to the drilling process in the petroleum industry can only enable drilling fluid to enter from the inside of a drill rod and be discharged from an annular gap between the outer wall of the drill rod and the inner wall of a drilling well, so that the window density of the drilling fluid can be influenced for a hypertonic stratum, the drilling fluid can enter the stratum, and the leakage and the pollution are caused. In addition, the existing wellhead blowout preventer is also arranged independently, and the structure of the wellhead blowout preventer is also complex. Aiming at the drilling process of the high-permeability stratum, in order to realize that the drilling fluid enters and exits inside the drill rod, the contact between the drilling fluid and the stratum is reduced as much as possible, the window density of the drilling fluid is increased, a wellhead rotation conversion blowout prevention integrated device is urgently needed to be designed, the wellhead blowout prevention structure can be simplified, and the drilling fluid can enter and exit through the wellhead rotation conversion blowout prevention integrated device in the drilling process.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the wellhead rotating reversing blowout prevention integrated device which is reasonable in design, has a wellhead blowout prevention function, has the drilling fluid inlet and outlet in the drill rod, and fully reduces the penetration of the drilling fluid into a stratum.
In order to solve the technical problems, the invention adopts the following technical scheme: the wellhead rotating, reversing and blowout preventing integrated device comprises a wellhead rotating, sealing and reversing mechanism and a wellhead blowout preventer positioned below the wellhead rotating, sealing and reversing mechanism, wherein a rotating support mechanism is arranged at the top of the wellhead blowout preventer, a section of drill rod arranged in the vertical direction is fixedly connected to the bottom of the wellhead rotating, sealing and reversing mechanism, the bottom of the wellhead rotating, sealing and reversing mechanism is rotatably connected to the rotating support mechanism, the drill rod extends into the rotating support mechanism and the wellhead blowout preventer, and the lower end of the drill rod extends out of the wellhead blowout preventer; the inside of the wellhead rotary sealing reversing mechanism and the inside of the drill rod are provided with clapboards along the axis direction, and the clapboards divide the drill rod and the inside of the wellhead rotary sealing reversing mechanism into a drilling fluid input channel and a drilling fluid output channel.
The wellhead blowout preventer comprises a support box, jacks are correspondingly formed in the top and the bottom of the support box up and down, the drill rod penetrates through the jacks, a first sealing ring which is in sealing fit with the excircle of the drill rod is arranged in each jack of the support box, the left side and the right side of the support box are respectively provided with a left hydraulic driving shearing mechanism and a right hydraulic driving shearing mechanism, and the left hydraulic driving shearing mechanism and the right hydraulic driving shearing mechanism are identical in structure and are arranged in bilateral symmetry;
left side hydraulic drive shears mechanism includes the cylinder, the push rod, piston and shearing flashboard, the cylinder sets up along left right direction level, cylinder right-hand member and supporting box left side fixed connection and inside intercommunication, the push rod passes the cylinder left side from the left hand right side and stretches into in the cylinder along the axial direction of cylinder, the cylinder left side is provided with the second sealing washer with push rod excircle sliding seal complex, piston sliding connection is in the cylinder, the piston excircle be provided with cylinder inner wall sliding seal complex third sealing washer, push rod right-hand member and piston left side fixed connection, it is connected in the supporting box along controlling horizontal direction sliding connection to shear the flashboard, be connected through a connecting rod between the left side of shearing flashboard and the piston right side, the periphery of shearing flashboard is provided with the fourth sealing washer with supporting box inner wall sliding connection, the right side fixedly connected with of.
The rotary supporting mechanism comprises a supporting cylinder sleeved outside a drill rod, a connecting flange is fixedly arranged at the lower end of the supporting cylinder, the connecting flange is fixedly arranged at the top of a supporting box through a bolt, the upper end of the supporting cylinder is fixedly provided with an annular supporting groove with an open top, two rings of lower supporting steel balls are arranged at the bottom of the annular supporting groove, a supporting ring plate is arranged at the top of the lower supporting steel balls, two rings of upper supporting steel balls are arranged on the upper surface of the supporting ring plate, the upper part of each upper supporting steel ball is higher than the annular supporting groove, and the bottom of a wellhead rotary sealing reversing mechanism is fixedly connected with the upper end.
The well mouth rotary sealing reversing mechanism comprises a square box and a fixed cylinder, the square box is arranged inside the fixed cylinder, the fixed cylinder is internally provided with an annular guide groove with an inner side opening along the circumferential direction, the central line of the fixed cylinder is superposed with the central line of a drill rod, four groups of drilling liquid inlet pipelines which are communicated with the annular guide groove are uniformly arranged on the outer circumference of the fixed cylinder along the circumferential direction, each group of drilling liquid inlet pipelines comprises two pipelines which are arranged along the radial direction of the fixed cylinder, wherein two adjacent groups of drilling liquid inlet pipelines are drilling liquid inlet pipes, the other two adjacent groups of drilling liquid inlet pipes are drilling liquid outlet pipes, a liquid inlet electromagnetic valve is arranged on the drilling liquid inlet pipe, a liquid outlet electromagnetic valve is arranged on the drilling liquid outlet pipes, the top of the square box is provided with a box cover, a fifth sealing ring is arranged between the bottom of the box cover and the upper end surface of, the partition plates inside the square box are arranged along the diagonal line of the square box; the four rotary sealing guide pipe assemblies are correspondingly communicated with the four groups of drilling liquid inlet pipelines; the square box bottom is fixedly connected with the upper end of the drill rod and is in rolling connection with the upper supporting steel ball, and the square box bottom is provided with an opening and is communicated with the inner part of the upper end of the drill rod.
The four rotary sealing guide pipe assemblies respectively comprise a rotary sliding block, the inner end of the rotary sliding block is fixedly connected to the side face of the square box through a mounting bolt, the outer end of the rotary sliding block extends into the annular guide groove, the upper surface and the lower surface of the outer end of the rotary sliding block are respectively connected with the bottom and the top of the annular guide groove in a sliding sealing mode through a sixth sealing ring, two liquid through holes which are arranged along the radial direction of the fixed cylinder and are communicated with drilling liquid pipelines of each group are formed in the rotary sliding block, each liquid through hole is of a stepped hole structure with the inner diameter larger than the outer diameter, and each liquid through hole comprises an inner coarse hole and an outer fine; an internal and external pressure difference on-off mechanism is arranged in the inner coarse hole.
Two adjacent internal and external pressure difference on-off mechanisms include the first mounting panel in the square chest outside through first screw fixed connection, set up all with the first through-hole of interior gross porosity intercommunication on first mounting panel and the square chest, the outside of first mounting panel is fixed to be provided with the first locating plate that all is located interior gross porosity inside along four that the through-hole circumferencial direction was arranged, all seted up a first guide hole on every first locating plate, the length direction of first guide hole is on a parallel with the central line of interior gross porosity, outer pore's the interior intraoral slip of inner is provided with first plunger, the outer circumference of first plunger is provided with the seventh sealing washer with outer pore inner wall sliding seal complex, the excircle fixedly connected with of first plunger stretches into four first guide blocks in four first guide holes, be provided with the first compression spring who is located between the four first locating plates between four first guide blocks and the first mounting panel.
In addition, two adjacent internal and external pressure difference on-off mechanisms comprise a second mounting plate fixedly connected to the bottom of the inner coarse hole through a second screw, a third through hole communicated with the outer fine hole is formed in the second mounting plate, a guide cylinder which is coaxial with the inner coarse hole is fixedly arranged on the outer side of the square box, a fourth through hole which is equal to the inner diameter of the guide cylinder and is communicated with the guide cylinder is formed in the square box, four second positioning plates which are arranged along the circumferential direction of the third through hole are fixedly arranged on the inner side of the second mounting plate and are positioned in the inner coarse hole, each second positioning plate is provided with a second guide hole, the length direction of each second guide hole is parallel to the central line of the inner coarse hole, a second plunger is slidably arranged in the inner port of the outer fine hole, an eighth sealing ring which is in sliding sealing fit with the inner walls of the guide cylinder and the fourth through hole is arranged on the outer circumference of the second plunger, and four second guide blocks which, and second compression springs positioned among the four second positioning plates are arranged between the four second guide blocks and the second mounting plate.
By adopting the technical scheme, the wellhead rotary sealing reversing mechanism is installed on the wellhead blowout preventer, and the wellhead blowout preventer is fixedly installed on a wellhead. The wellhead rotary sealing reversing mechanism and the wellhead blowout preventer are coaxially arranged. The cylinder barrel of the wellhead blowout preventer is fixedly arranged at the wellhead on the ground, and the upper end part of the square box is in transmission connection with the power driving mechanism. When a well mouth needs to be sealed emergently, the power driving mechanism stops rotating, a well mouth blowout preventer is started, a push rod of the left hydraulic driving shearing mechanism moves rightwards, a push rod of the right hydraulic driving shearing mechanism moves leftwards, the left shearing head and the right shearing head extrude the uppermost drill rod, the partition plate is a thin steel plate, the strength is small, therefore, no matter how much the included angle is formed between the plane where the partition plate is located and the push rod, the uppermost drill rod can be flattened under the action of the hydraulic driving force, the inner hole of the drill rod is sealed, and the well mouth is sealed.
The fixed cylinder of the wellhead rotary sealing reversing mechanism is fixedly connected to a wellhead, the square box is clamped by the lower end of the power driving mechanism to rotate, and the square box drives the drill rod to rotate. In the rotating process of the square box, when two adjacent groups of drilling fluid inlet pipes are correspondingly communicated with the liquid through holes in the two adjacent rotary sliding blocks, the other two adjacent groups of drilling fluid outlet pipes are correspondingly communicated with the liquid through holes in the two adjacent rotary sliding blocks, drilling fluid flows into the square box from the drilling fluid inlet pipes, and meanwhile drilling fluid in the square box flows into the drilling fluid outlet pipes to be discharged; the pressure of the drilling fluid inlet pipe is greater than that of the fluid inlet area at one side of the inner partition plate of the square box, the drilling fluid overcomes the elastic force of the first compression spring to push the first plunger, so that the first plunger is separated from the outer fine hole, the drilling fluid inlet pipe, the outer fine hole, the inner coarse hole are communicated with the fluid inlet area inside the square box, the drilling fluid enters the square box and is injected into a drill bit drilling operation area connected with a section of drill rod at the lowest end through a drilling fluid input channel at one side of the partition plate inside the drill rod, the drilling fluid enters the fluid outlet area at the other side of the inner partition plate of the square box through a drilling fluid output channel at the other side of the inner partition plate, the pressure of the drilling fluid in the fluid outlet area inside the square box is greater than that of the drilling fluid, the drilling fluid overcomes the elastic force of the second compression spring to push the second plunger, so that the second plunger, The inner coarse holes are communicated with a liquid outlet area inside the square box, and the drilling liquid is discharged through a drilling liquid outlet pipe.
Because four sides of square chest all are provided with four rotary seal guide pipe subassemblies to and the outer circumference of fixed cylinder evenly is provided with two sets of adjacent brill feed liquid feed pipe and two sets of adjacent brill feed liquid drain pipes along the circumferencial direction, when square chest and drilling rod rotate 90 under the feed liquid and play liquid state again, still can reach the feed liquid and go out the liquid. When square chest and drilling rod rotate 180 with 270 when, drilling fluid feed pipe corresponds with the inside play liquid district of square chest this moment, and the drilling fluid drain pipe corresponds with the inside feed liquor district of square chest. At the moment, the pressure in the drilling fluid inlet pipe is greater than the pressure in the fluid outlet area, the pressure in the drilling fluid inlet pipe can push the second plunger inwards under the action of pressure difference, the second plunger extends into the guide cylinder to seal a channel between the drilling fluid inlet pipe and the fluid outlet area, and the drilling fluid between the drilling fluid inlet pipe and the fluid outlet area cannot be communicated; meanwhile, under the action of the pressure difference, the pressure in the liquid inlet area is greater than the pressure in the drilling liquid outlet pipe, the pressure of drilling liquid in the liquid inlet area can push the first plunger outwards, the first plunger extends into the outer pore to seal a channel between the drilling liquid outlet pipe and the liquid inlet area, and at the moment, the drilling liquid between the drilling liquid outlet pipe and the liquid inlet area cannot be communicated. Thereby realizing 180-degree rotation self-sealing of the square box and the drill rod.
And a liquid inlet electromagnetic valve connected to the drilling fluid inlet pipe and a liquid outlet electromagnetic valve arranged on the drilling fluid outlet pipe are respectively used for controlling the liquid inlet and the liquid outlet of drilling fluid. The inner parts of the square box and the drill rod are divided into a drilling fluid input channel and a drilling fluid output channel by the partition plates arranged in the square box and the drill rod, so that the drilling fluid is prevented from permeating into a stratum through an annular cavity between the drill rod and an oil well when the drilling fluid is discharged.
The rotary sliding block is internally provided with an annular guide groove for rotating in the fixed barrel, and the annular guide groove plays a role in limiting the central positioning of the rotary sliding block in the rotating process. The fixed cylinder can be made of two semi-cylinders and is fixedly connected through a hoop, so that the rotary sliding block can be conveniently installed in the annular guide groove.
In conclusion, the invention adopts the partition plate to divide the interior of the drill rod into the drilling fluid input channel and the drilling fluid output channel, so as to avoid the pollution to the stratum caused by leakage due to the large-area contact of drilling fluid and the stratum, specially designs the wellhead rotary sealing reversing mechanism with the liquid inlet and the liquid outlet rotating 180 degrees at intervals in the rotating process of the drill rod, and is integrated with a wellhead blowout preventer, so that the structure is more compact, the functions are more diversified, and the window density of the drilling fluid is reduced.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is an axial cross-sectional view of the present invention;
FIG. 3 is a schematic perspective view of the square box and the internal and external pressure difference on-off mechanism;
FIG. 4 is a schematic view of a structure between a square box and a fixed cylinder;
FIG. 5 is a schematic diagram of the wellhead rotary sealing reversing mechanism in the liquid inlet and outlet states in the invention;
fig. 6 is a schematic view of the wellhead rotary sealing reversing mechanism in a self-sealing state.
Detailed Description
As shown in fig. 1-6, the wellhead rotating, reversing and blowout preventing integrated device of the invention comprises a wellhead rotating, sealing and reversing mechanism 100 and a wellhead blowout preventer 6 positioned below the wellhead rotating, sealing and reversing mechanism 100, wherein a rotating support mechanism 101 is arranged at the top of the wellhead blowout preventer 6, a section of drill rod 14 arranged along the vertical direction is fixedly connected to the bottom of the wellhead rotating, sealing and reversing mechanism 100, the bottom of the wellhead rotating, sealing and reversing mechanism 100 is rotatably connected to the rotating support mechanism 101, the drill rod 14 extends into the rotating support mechanism 101 and the wellhead blowout preventer 6, and the lower end of the drill rod 14 extends out of the wellhead blowout preventer 6; the inside of the wellhead rotary seal reversing mechanism 100 and the inside of the drill rod 14 are provided with partition plates 17 along the axial direction, and the partition plates 17 divide the drill rod 14 and the inside of the wellhead rotary seal reversing mechanism 100 into a drilling fluid input channel 19 and a drilling fluid output channel 18.
The wellhead blowout preventer 6 comprises a support box 60, jacks are correspondingly formed in the top and the bottom of the support box 60 up and down, the drill rod 14 penetrates through the jacks, first sealing rings which are in sealing fit with the excircle of the drill rod 14 are arranged in the jacks of the support box 60, a left hydraulic driving shearing mechanism and a right hydraulic driving shearing mechanism are respectively arranged on the left side and the right side of the support box 60, and the left hydraulic driving shearing mechanism and the right hydraulic driving shearing mechanism are identical in structure and are arranged in bilateral symmetry;
the left hydraulic drive shearing mechanism comprises a cylinder 61, a push rod 62, a piston 63 and a shearing gate plate 64, the cylinder 61 is horizontally arranged along the left-right direction, the right end of the cylinder 61 is fixedly connected with the left side of a support box 60 and is internally communicated, the push rod 62 penetrates through the left side of the cylinder 61 from left to right and extends into the cylinder 61 along the axial direction of the cylinder 61, the left side of the cylinder 61 is provided with a second sealing ring in sliding sealing fit with the excircle of the push rod 62, the piston 63 is in sliding connection with the cylinder 61, the excircle of the piston 63 is provided with a third sealing ring in sliding sealing fit with the inner wall of the cylinder 61, the right end of the push rod 62 is fixedly connected with the left side of the piston 63, the shearing gate plate 64 is in sliding connection with the support box 60 along the left-right horizontal direction, the left side of the shearing gate plate 64 is connected with, a shear head 66 is fixedly attached to the right side of the shear ram 64.
The rotary supporting mechanism 101 comprises a supporting cylinder 67 sleeved outside a drill rod 14, a connecting flange 68 is fixedly arranged at the lower end of the supporting cylinder 67, the connecting flange 68 is fixedly arranged at the top of a supporting box 60 through bolts, an annular supporting groove 69 with an open top is fixedly arranged at the upper end of the supporting cylinder 67 in the axial direction, two rings of lower supporting steel balls 70 are arranged at the bottom of the annular supporting groove 69, a supporting ring plate 71 is arranged at the top of the lower supporting steel balls 70, two rings of upper supporting steel balls 72 are arranged on the upper surface of the supporting ring plate 71, the upper portion of each upper supporting steel ball 72 is higher than the annular supporting groove 69, and the bottom of a wellhead rotary sealing reversing mechanism 100 is fixedly connected with the upper end of.
The wellhead rotary sealing reversing mechanism 100 comprises a square box 73 and a fixed cylinder 74, the square box 73 is arranged inside the fixed cylinder 74, an annular guide groove 75 with an opening at the inner side is arranged inside the fixed cylinder 74 along the circumferential direction, the center line of the fixed cylinder 74 coincides with the center line of the drill rod 14, four groups of drilling liquid inlet pipelines which are communicated with the annular guide groove 75 are uniformly arranged on the outer circumference of the fixed cylinder 74 along the circumferential direction, each group of drilling liquid inlet pipelines comprises two pipelines which are arranged along the radial direction of the fixed cylinder 74, two adjacent groups of drilling liquid inlet pipelines are drilling liquid inlet pipes 76, the other two adjacent groups of drilling liquid inlet pipes are drilling liquid outlet pipes 77, a liquid inlet electromagnetic valve 78 is arranged on each drilling liquid inlet pipe 76, a liquid outlet electromagnetic valve 79 is arranged on each drilling liquid outlet pipe 77, a box cover 80 is arranged at the top of the square box 73, and a fifth sealing ring is arranged between the, a rotary sealing guide pipe assembly 102 is fixedly arranged on each of the four side surfaces of the square box 73, and a partition plate 17 in the square box 73 is arranged along the diagonal line of the square box 73; the four rotary sealing guide pipe assemblies 102 are correspondingly communicated with four groups of drilling liquid pipelines; the bottom of the square box 73 is fixedly connected with the upper end of the drill rod 14 and is in rolling connection with the upper supporting steel ball 72, and the bottom of the square box 73 is provided with an opening and is communicated with the inside of the upper end of the drill rod 14.
The four rotary sealing guide pipe assemblies 102 respectively comprise a rotary sliding block 81, the inner end of the rotary sliding block 81 is fixedly connected to the side face of the square box 73 through a mounting bolt, the outer end of the rotary sliding block 81 extends into the annular guide groove 75, the upper surface and the lower surface of the outer end of the rotary sliding block 81 are respectively connected with the bottom and the top of the annular guide groove 75 in a sliding and sealing mode through a sixth sealing ring, two liquid through holes which are arranged along the radial direction of the fixed cylinder 74 and correspond to the communication of each group of drilling liquid pipelines are formed in the rotary sliding block 81, each liquid through hole is of a stepped hole structure with a thick inner part and a thin outer part, and each liquid through hole comprises a thick inner hole 82 and; an internal and external pressure difference on-off mechanism 103 is arranged in the inner coarse hole 82.
Two adjacent internal and external pressure difference on-off mechanisms 103 comprise first mounting plates 84 fixedly connected to the outer sides of the square boxes 73 through first screws, first through holes communicated with the inner thick holes 82 are formed in the first mounting plates 84 and the square boxes 73, four first positioning plates 85 arranged along the circumferential direction of the through holes and located inside the inner thick holes 82 are fixedly arranged on the outer sides of the first mounting plates 84, a first guide hole 86 is formed in each first positioning plate 85, the length direction of each first guide hole 86 is parallel to the central line of the inner thick hole 82, first plungers 87 are slidably arranged in inner ports of the outer thin holes 83, seventh sealing rings in sliding sealing fit with the inner walls of the outer thin holes 83 are arranged on the outer circumferences of the first plungers 87, four first guide blocks 88 extending into the four first guide holes 86 are fixedly connected to the outer circles of the first plungers 87, and first compression springs 89 located between the four first positioning plates 85 are arranged between the four first guide blocks 88 and the first mounting plates 84.
In addition, two adjacent internal and external pressure difference on-off mechanisms 103 comprise a second mounting plate 90 fixedly connected to the bottom of the inner coarse hole 82 through a second screw, a third through hole communicated with the outer fine hole 83 is formed in the second mounting plate 90, a guide cylinder 91 coaxial with the inner coarse hole 82 is fixedly arranged on the outer side of the square box 73, a fourth through hole which is equal to the inner diameter of the guide cylinder 91 and is communicated with the guide cylinder 91 is formed in the square box 73, four second positioning plates 92 which are arranged along the circumferential direction of the third through hole are fixedly arranged on the inner side of the second mounting plate 90 and are positioned in the inner coarse hole 82, a second guide hole 93 is formed in each second positioning plate 92, the length direction of each second guide hole 93 is parallel to the central line of the inner coarse hole 82, a second plunger 94 is slidably arranged in the inner port of the outer fine hole 83, an eighth sealing ring in sliding sealing fit with the guide cylinder 91 and the inner wall of the fourth through hole is, the outer circle of the second plunger 94 is fixedly connected with four second guide blocks 95 extending into the four second guide holes 93, and a second compression spring 96 located between the four second positioning plates 92 is arranged between the four second guide blocks 95 and the second mounting plate 90.
The wellhead rotary sealing reversing mechanism 100 is installed on a wellhead blowout preventer 6, and the wellhead blowout preventer 6 is fixedly installed on a wellhead. The wellhead rotary sealing reversing mechanism 100 and the wellhead blowout preventer 6 are coaxially installed. The cylinder 61 of the wellhead blowout preventer 6 is fixedly arranged at the wellhead on the ground, and the upper end part of the square box 73 is in transmission connection with a power driving mechanism. When the wellhead needs to be sealed emergently, the power driving mechanism stops rotating, the wellhead blowout preventer 6 is started, the push rod 62 of the left hydraulic driving shearing mechanism moves rightwards, the push rod 62 of the right hydraulic driving shearing mechanism moves leftwards, the left shearing head 66 and the right shearing head 66 extrude the uppermost drill rod 14, the partition plate 17 is made of thin steel plate and is small in strength, and therefore, no matter how much the included angle is formed between the plane where the partition plate 17 is located and the push rod 62, the uppermost drill rod 14 can be flattened under the action of the hydraulic driving force, the inner hole of the drill rod 14 is sealed, and the wellhead is sealed.
The fixed cylinder 74 of the wellhead rotary sealing reversing mechanism 100 is fixedly connected to a wellhead, the square box 73 is clamped at the lower end of the power driving mechanism to rotate, and the square box 73 drives the drill rod 14 to rotate. In the rotating process of the square box 73, when two adjacent groups of drilling fluid inlet pipes are correspondingly communicated with the fluid holes in the two adjacent rotating sliding blocks 81, at the moment, the other two adjacent groups of drilling fluid inlet pipes 77 are correspondingly communicated with the fluid holes in the two adjacent rotating sliding blocks 81, the drilling fluid flows into the square box 73 from the drilling fluid inlet pipe 76, and meanwhile, the drilling fluid in the square box 73 flows into the drilling fluid outlet pipe 77 and is discharged; at the moment, the pressure of the drilling fluid inlet pipe 76 is greater than the pressure at the liquid inlet area 98 at one side of the partition plate 17 in the square box 73, at the moment, the drilling fluid overcomes the elastic force of the first compression spring 89 to push the first plunger 87, so that the first plunger 87 is separated from the outer fine hole 83, the drilling fluid inlet pipe, the outer fine hole 83, the inner coarse hole 82 are communicated with the liquid inlet area 98 in the square box 73, the drilling fluid enters the square box 73 and is injected into a drilling operation area of a drill bit connected with the lowermost section of drill pipe 14 through the drilling fluid inlet channel 19 at one side of the partition plate 17 in the drill pipe 14, the drilling fluid upwards enters the liquid outlet area 97 at the other side of the partition plate 17 in the square box 73 through the drilling fluid outlet channel 18 at the other side of the partition plate 17 in the drill pipe 14, the pressure of the liquid outlet area 97 in the square box 73 is greater than the pressure in the drilling fluid outlet pipe 77, the second plunger 94 is separated from the guide cylinder 91, so that the drilling fluid outlet pipe 77, the outer fine holes 83, the inner coarse holes 82 and the fluid outlet area 97 in the square box 73 are communicated, and the drilling fluid is discharged through the drilling fluid outlet pipe 77. The arrows in fig. 5 indicate the direction of the drilling fluid flow.
Because four sides of the square box 73 are respectively provided with four rotary sealing guide pipe assemblies 102, and the outer circumference of the fixed cylinder 74 is uniformly provided with two groups of adjacent drilling liquid inlet pipes and two groups of adjacent drilling liquid outlet pipes 77 along the circumferential direction, when the square box 73 and the drill rod 14 rotate by 90 degrees under the liquid inlet and outlet states, liquid inlet and liquid outlet can still be achieved. When the square box 73 and the drill rod 14 rotate by 180 degrees and 270 degrees, the drilling fluid inlet pipe 76 corresponds to the liquid outlet area 97 in the square box 73, and the drilling fluid outlet pipe 77 corresponds to the liquid inlet area 98 in the square box 73. At the moment, the pressure in the drilling fluid inlet pipe 76 is greater than the pressure in the fluid outlet area 97, under the action of pressure difference, the pressure in the drilling fluid inlet pipe 76 can push the second plunger 94 inwards, the second plunger 94 extends into the guide cylinder 91 to seal a channel between the drilling fluid inlet pipe 76 and the fluid outlet area 97, and at the moment, the drilling fluid between the drilling fluid inlet pipe 76 and the fluid outlet area 97 cannot be communicated; meanwhile, under the action of the pressure difference, the pressure in the liquid inlet area 98 is greater than the pressure in the drilling liquid outlet pipe 77, the pressure of drilling liquid in the liquid inlet area 98 can push the first plunger 87 outwards, the first plunger 87 extends into the outer pore 83 to seal a channel between the drilling liquid outlet pipe 77 and the liquid inlet area 98, and at the moment, the drilling liquid between the drilling liquid outlet pipe 77 and the liquid inlet area 98 cannot be communicated. Thereby realizing the self-sealing of the square box 73 and the drill rod 14 by rotating 180 degrees. So rotatory a week, feed liquor and play liquid are all communicate twice simultaneously, realize common feed liquor and flowing back and go on simultaneously, ensure that internal pressure is balanced.
A liquid inlet electromagnetic valve 78 connected to the drilling liquid inlet pipe 76 and a liquid outlet electromagnetic valve 79 arranged on the drilling liquid outlet pipe 77 are respectively used for controlling the liquid inlet and the liquid outlet of the drilling liquid. The internal division into the drilling fluid inlet channel 19 and the drilling fluid outlet channel 18 is provided by a partition 17 arranged in the square box 73 and the drill pipe 14, so that the drilling fluid is prevented from penetrating into the formation through the annular space between the drill pipe 14 and the oil well when being discharged.
The rotary slide 81 rotates in an annular guide groove 75 formed in the fixed cylinder 74, and the annular guide groove 75 plays a role in limiting the central positioning of the rotary slide 81 during the rotation. The fixed cylinder 74 may be made of two half cylinders and fixedly connected by a hoop, so that the rotary slide 81 can be easily installed in the annular guide groove 75.
The present embodiment is not intended to limit the shape, material, structure, direction, etc. of the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are within the protection scope of the technical solution of the present invention.
Claims (4)
1. The well head rotating reversing blowout prevention integrated device is characterized in that: the rotary support mechanism is arranged at the top of the wellhead blowout preventer, a section of drill rod arranged along the vertical direction is fixedly connected to the bottom of the wellhead rotary sealing reversing mechanism, the bottom of the wellhead rotary sealing reversing mechanism is rotatably connected to the rotary support mechanism, the drill rod extends into the rotary support mechanism and the wellhead blowout preventer, and the lower end of the drill rod extends out of the wellhead blowout preventer; the inner part of the wellhead rotary sealing reversing mechanism and the inner part of the drill rod are provided with a clapboard along the axis direction, and the clapboard divides the drill rod and the inner part of the wellhead rotary sealing reversing mechanism into a drilling fluid input channel and a drilling fluid output channel;
the wellhead blowout preventer comprises a support box, jacks are correspondingly formed in the top and the bottom of the support box up and down, the drill rod penetrates through the jacks, a first sealing ring which is in sealing fit with the excircle of the drill rod is arranged in each jack of the support box, the left side and the right side of the support box are respectively provided with a left hydraulic driving shearing mechanism and a right hydraulic driving shearing mechanism, and the left hydraulic driving shearing mechanism and the right hydraulic driving shearing mechanism are identical in structure and are arranged in bilateral symmetry;
the left hydraulic driving shearing mechanism comprises a cylinder barrel, a push rod, a piston and a shearing flashboard, wherein the cylinder barrel is horizontally arranged along the left-right direction, the right end of the cylinder barrel is fixedly connected with the left side of a supporting box and is internally communicated, the push rod penetrates through the left side of the cylinder barrel from left to right and extends into the cylinder barrel along the axial direction of the cylinder barrel, a second sealing ring in sliding sealing fit with the excircle of the push rod is arranged on the left side of the cylinder barrel, the piston is in sliding connection with the cylinder barrel, the excircle of the piston is provided with a third sealing ring in sliding sealing fit with the inner wall of the cylinder barrel, the right end of the push rod is fixedly connected with the left side of the piston, the shearing flashboard is in sliding connection with the supporting box along the left-right horizontal direction, the left side of the shearing;
the rotary supporting mechanism comprises a supporting cylinder sleeved outside the drill rod, the lower end of the supporting cylinder is fixedly provided with a connecting flange, the connecting flange is fixedly installed at the top of the supporting box through bolts, the upper end of the supporting cylinder is coaxially and fixedly provided with an annular supporting groove with an open top, the bottom of the annular supporting groove is provided with two rings of lower supporting steel balls, the top of each lower supporting steel ball is provided with a supporting ring plate, the upper surface of each supporting ring plate is provided with two rings of upper supporting steel balls, the upper parts of the upper supporting steel balls are higher than the annular supporting groove, and the bottom of the wellhead rotary sealing reversing mechanism is fixedly connected with the upper;
the well mouth rotary sealing reversing mechanism comprises a square box and a fixed cylinder, the square box is arranged inside the fixed cylinder, the fixed cylinder is internally provided with an annular guide groove with an inner side opening along the circumferential direction, the central line of the fixed cylinder is superposed with the central line of a drill rod, four groups of drilling liquid inlet pipelines which are communicated with the annular guide groove are uniformly arranged on the outer circumference of the fixed cylinder along the circumferential direction, each group of drilling liquid inlet pipelines comprises two pipelines which are arranged along the radial direction of the fixed cylinder, wherein two adjacent groups of drilling liquid inlet pipelines are drilling liquid inlet pipes, the other two adjacent groups of drilling liquid inlet pipes are drilling liquid outlet pipes, a liquid inlet electromagnetic valve is arranged on the drilling liquid inlet pipe, a liquid outlet electromagnetic valve is arranged on the drilling liquid outlet pipes, the top of the square box is provided with a box cover, a fifth sealing ring is arranged between the bottom of the box cover and the upper end surface of, the partition plates inside the square box are arranged along the diagonal line of the square box; the four rotary sealing guide pipe assemblies are correspondingly communicated with the four groups of drilling liquid inlet pipelines; the square box bottom is fixedly connected with the upper end of the drill rod and is in rolling connection with the upper supporting steel ball, and the square box bottom is provided with an opening and is communicated with the inner part of the upper end of the drill rod.
2. The wellhead rotary reversing blowout prevention integrated device according to claim 1, characterized in that: the four rotary sealing guide pipe assemblies respectively comprise a rotary sliding block, the inner end of the rotary sliding block is fixedly connected to the side face of the square box through a mounting bolt, the outer end of the rotary sliding block extends into the annular guide groove, the upper surface and the lower surface of the outer end of the rotary sliding block are respectively connected with the bottom and the top of the annular guide groove in a sliding sealing mode through a sixth sealing ring, two liquid through holes which are arranged along the radial direction of the fixed cylinder and are communicated with drilling liquid pipelines of each group are formed in the rotary sliding block, each liquid through hole is of a stepped hole structure with the inner diameter larger than the outer diameter, and each liquid through hole comprises an inner coarse hole and an outer fine; an internal and external pressure difference on-off mechanism is arranged in the inner coarse hole.
3. The wellhead rotary reversing blowout prevention integrated device according to claim 2, characterized in that: two adjacent internal and external pressure difference on-off mechanisms include the first mounting panel in the square chest outside through first screw fixed connection, set up all with the first through-hole of interior gross porosity intercommunication on first mounting panel and the square chest, the outside of first mounting panel is fixed to be provided with the first locating plate that all is located interior gross porosity inside along four that the through-hole circumferencial direction was arranged, all seted up a first guide hole on every first locating plate, the length direction of first guide hole is on a parallel with the central line of interior gross porosity, outer pore's the interior intraoral slip of inner is provided with first plunger, the outer circumference of first plunger is provided with the seventh sealing washer with outer pore inner wall sliding seal complex, the excircle fixedly connected with of first plunger stretches into four first guide blocks in four first guide holes, be provided with the first compression spring who is located between the four first locating plates between four first guide blocks and the first mounting panel.
4. The wellhead rotary reversing blowout prevention integrated device according to claim 3, characterized in that: in addition, two adjacent internal and external pressure difference on-off mechanisms comprise a second mounting plate fixedly connected to the bottom of the inner coarse hole through a second screw, a third through hole communicated with the outer fine hole is formed in the second mounting plate, a guide cylinder which is coaxial with the inner coarse hole is fixedly arranged on the outer side of the square box, a fourth through hole which is equal to the inner diameter of the guide cylinder and is communicated with the guide cylinder is formed in the square box, four second positioning plates which are arranged along the circumferential direction of the third through hole are fixedly arranged on the inner side of the second mounting plate and are positioned in the inner coarse hole, each second positioning plate is provided with a second guide hole, the length direction of each second guide hole is parallel to the central line of the inner coarse hole, a second plunger is slidably arranged in the inner port of the outer fine hole, an eighth sealing ring which is in sliding sealing fit with the inner walls of the guide cylinder and the fourth through hole is arranged on the outer circumference of the second plunger, and four second guide blocks which, and second compression springs positioned among the four second positioning plates are arranged between the four second guide blocks and the second mounting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810169969.XA CN108360996B (en) | 2018-03-01 | 2018-03-01 | Wellhead rotating reversing blowout prevention integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810169969.XA CN108360996B (en) | 2018-03-01 | 2018-03-01 | Wellhead rotating reversing blowout prevention integrated device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108360996A CN108360996A (en) | 2018-08-03 |
| CN108360996B true CN108360996B (en) | 2020-04-10 |
Family
ID=63002957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810169969.XA Active CN108360996B (en) | 2018-03-01 | 2018-03-01 | Wellhead rotating reversing blowout prevention integrated device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108360996B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159221B (en) * | 2019-06-21 | 2024-02-06 | 中国石油化工集团有限公司 | Wellhead overflow collecting device |
| CN113702016A (en) * | 2021-08-26 | 2021-11-26 | 中海石油(中国)有限公司 | Remote control device for land expansion test of underwater wellhead |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2722007A1 (en) * | 1977-05-14 | 1978-12-14 | Hydril Co | Ram type well blow out preventer - has pressure responsive ratchet mechanism for locking rams in closed positions |
| US4640372A (en) * | 1985-11-25 | 1987-02-03 | Davis Haggai D | Diverter including apparatus for breaking up large pieces of formation carried to the surface by the drilling mud |
| CN2500796Y (en) * | 2001-10-18 | 2002-07-17 | 中国石化胜利油田有限公司采油工艺研究院 | Oil field well-repairing rotating device |
| CN2771466Y (en) * | 2004-12-26 | 2006-04-12 | 中国石化胜利油田有限公司海洋石油开发公司 | Screw pump well head automatic blow-out preventing device |
| CN201826799U (en) * | 2010-09-24 | 2011-05-11 | 中国石化集团胜利石油管理局黄河钻井总公司 | Device for splitting flow from completion drilled well head |
| CN203022724U (en) * | 2013-01-18 | 2013-06-26 | 上海神开石油化工装备股份有限公司 | Control monitoring device of rotary blowout preventer |
| CN104563930A (en) * | 2013-10-27 | 2015-04-29 | 中国石油化工集团公司 | Double-flow-channel direction control short connection device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6732804B2 (en) * | 2002-05-23 | 2004-05-11 | Weatherford/Lamb, Inc. | Dynamic mudcap drilling and well control system |
-
2018
- 2018-03-01 CN CN201810169969.XA patent/CN108360996B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2722007A1 (en) * | 1977-05-14 | 1978-12-14 | Hydril Co | Ram type well blow out preventer - has pressure responsive ratchet mechanism for locking rams in closed positions |
| US4640372A (en) * | 1985-11-25 | 1987-02-03 | Davis Haggai D | Diverter including apparatus for breaking up large pieces of formation carried to the surface by the drilling mud |
| CN2500796Y (en) * | 2001-10-18 | 2002-07-17 | 中国石化胜利油田有限公司采油工艺研究院 | Oil field well-repairing rotating device |
| CN2771466Y (en) * | 2004-12-26 | 2006-04-12 | 中国石化胜利油田有限公司海洋石油开发公司 | Screw pump well head automatic blow-out preventing device |
| CN201826799U (en) * | 2010-09-24 | 2011-05-11 | 中国石化集团胜利石油管理局黄河钻井总公司 | Device for splitting flow from completion drilled well head |
| CN203022724U (en) * | 2013-01-18 | 2013-06-26 | 上海神开石油化工装备股份有限公司 | Control monitoring device of rotary blowout preventer |
| CN104563930A (en) * | 2013-10-27 | 2015-04-29 | 中国石油化工集团公司 | Double-flow-channel direction control short connection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108360996A (en) | 2018-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU167756U1 (en) | HYDRAULIC DOUBLE PRE-PRESSOR WITH TECHNOLOGICAL CONE | |
| US4448255A (en) | Rotary blowout preventer | |
| US3973468A (en) | Multi-stage extendible and contractible shaft with shock absorption | |
| CN108360996B (en) | Wellhead rotating reversing blowout prevention integrated device | |
| US11982146B2 (en) | Jet flow adjustment method for rotary steerable downhole release | |
| CN103821467B (en) | A kind of automatic drilling machine hydraulic power chuck | |
| CN108278092B (en) | Well head rotary reversing drilling liquid inlet and outlet and blowout prevention integrated petroleum drilling system | |
| CN102200000A (en) | Blowout preventing box of continuous oil pipe and drill rod | |
| CN111441737B (en) | Double-rotary-barrel double-plunger sliding key type shaft-plug core three-in-one blowout preventer | |
| CN104612583A (en) | Hydraulic hammer flow diversion mechanism, hydraulic hammer and down-hole drilling rig | |
| US2292336A (en) | Cushioning valve | |
| CN103573206B (en) | Rotary assembly of active sealing type rotary blowout preventer | |
| CN210127820U (en) | A torsion percussion device for deep oil gas development | |
| RU131797U1 (en) | PREVENTOR TIRE HYDRAULIC DOUBLE DOUBLE PPG2-STTs | |
| CN111022017A (en) | Manual fracturing and production wellhead device and using method thereof | |
| CN203702033U (en) | Hydraulic power chuck for automatic drilling machine | |
| CN203669812U (en) | Device for building oil and gas channel on high pressure oil and gas wellhead flange cylinder surface | |
| CN104695889A (en) | Integrated blowout preventer for non-well killing operation machine | |
| CN212774193U (en) | Slag discharge device for reverse circulation drilling | |
| RU2217269C1 (en) | Apparatus for drilling pressurized equipment | |
| RU2563845C2 (en) | Sealing method of cavity of pipes and annular space of well; pgu-2 anti-syphonage sealing device; pk-1 washing coil | |
| CN111691840A (en) | Side deslagging device for large-diameter reverse circulation drilling | |
| CN203050509U (en) | High-pressure shunt used for drill stem | |
| CN203285329U (en) | Floor type apparatus for rotating and elevating drilling tool of piling machine | |
| CN106939774B (en) | Flow distribution assembly for torsion impact drilling speed-increasing tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |