CN108316892B - Drilling fluid internal-in and internal-out type petroleum drilling system - Google Patents
Drilling fluid internal-in and internal-out type petroleum drilling system Download PDFInfo
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- CN108316892B CN108316892B CN201810169974.0A CN201810169974A CN108316892B CN 108316892 B CN108316892 B CN 108316892B CN 201810169974 A CN201810169974 A CN 201810169974A CN 108316892 B CN108316892 B CN 108316892B
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- 238000005553 drilling Methods 0.000 title claims abstract description 248
- 239000012530 fluid Substances 0.000 title claims abstract description 168
- 239000003208 petroleum Substances 0.000 title abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 48
- 238000011084 recovery Methods 0.000 claims abstract description 29
- 238000005192 partition Methods 0.000 claims description 73
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- 230000015572 biosynthetic process Effects 0.000 claims description 10
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- 230000000149 penetrating effect Effects 0.000 claims description 3
- 244000089486 Phragmites australis subsp australis Species 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 8
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- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
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- 238000000034 method Methods 0.000 description 7
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- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
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- 241001330002 Bambuseae Species 0.000 description 3
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
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Abstract
The drilling fluid internal-in and internal-out type petroleum drilling system comprises a drilling derrick, a drilling fluid inlet tank, a drilling fluid pressure pump, a drilling fluid recovery tank, a wellhead blowout preventer, a drill rod assembly, a stratum sealing cylinder and a drill bit; the drilling rod subassembly includes the drilling rod unit that a plurality of connected gradually, the inside of every drilling rod unit all is provided with a drilling rod baffle, both sides limit all with the inner wall sealing contact of drilling rod unit around the drilling rod baffle, the drilling rod baffle passes through baffle fixed subassembly to be fixed in the drilling rod unit, the setting is connected through baffle coupling assembling between the drilling rod baffle in different drilling rod units, the drilling rod baffle divide into left drilling fluid output channel and the drilling fluid input channel on right side with the inside of drilling rod subassembly. The invention can make the drilling fluid input and output in the drill rod assembly by the action of the drilling fluid recovery pump and the drilling fluid pressure pump, thereby avoiding the loss of a large amount of drilling fluid, simultaneously recycling the drilling fluid and reducing the drilling cost.
Description
Technical Field
The invention belongs to the field of petroleum drilling and production, and relates to an internal-in and internal-out type petroleum drilling system of drilling fluid.
Background
The drilling fluid density window is narrow, which is easy to cause borehole wall instability, leakage reservoir damage and other complex drilling situations, and seriously restricts the development speed and economic benefit of oil and gas resources.
The problem caused by the narrow density window of the drilling fluid brings great difficulty and risk to actual construction (the density window refers to the density range of the drilling fluid, the narrow density window is that the density range which can be selected by the drilling fluid is very small in the process of drilling a certain stratum, the complex situation of drilling is easy to happen in the situation, the density of the drilling fluid exceeds the range to cause well leakage, and the well wall collapses and falls blocks when the density of the drilling fluid is lower than the range). The factors influencing the drilling fluid density window mainly comprise three aspects, namely formation characteristics which are mainly related to geological conditions, engineering design which is unreasonable can also increase the drilling difficulty to form a narrow density window, and drilling operation, such as high pumping and exciting pressure caused by high tripping speed, long exposed time of a borehole with large drilling fluid annulus counter-speed, and the like. Therefore, normal drilling can be performed only by expanding the drilling fluid density window, reducing the pressure loss of the circulating air and accurately controlling the pressure loss of the circulating air.
Disclosure of Invention
The invention provides an internal-in and internal-out type petroleum drilling system for drilling fluid, which can input and output the drilling fluid in a drilling rod component by virtue of the action of a drilling fluid recovery pump and a drilling fluid pressure pump, so that the drilling fluid is prevented from being lost in a large amount, the flow-back capability of rock debris is improved, the drilling fluid is recycled, the drilling cost is reduced, the hydraulic pressure difference between the drilling fluids is favorable for accelerating the drilling speed of a drill bit, and the drilling is promoted.
In order to solve the technical problems, the invention adopts the following technical scheme:
the drilling fluid internal-in and internal-out type petroleum drilling system comprises a drilling derrick, a drilling fluid inlet tank, a drilling fluid pressure pump, a drilling fluid recovery tank, a wellhead blowout preventer, a drill rod assembly, a stratum sealing cylinder and a drill bit;
the drilling derrick is provided with a power driving mechanism, the drilling fluid inlet tank, the drilling fluid pressure pump and the liquid inlet ends of the drill rod components are sequentially connected along the flowing direction of the drilling fluid through pipelines, the liquid return end of the drill rod component, the drilling fluid recovery pump and the drilling fluid recovery tank are sequentially connected along the flowing direction of the drilling fluid through pipelines, and the drilling fluid inlet tank and the drilling fluid recovery tank are connected through a drilling fluid circulating pipeline;
a borehole is drilled in the stratum right below the drilling derrick by a drill rod assembly and a drill bit, a wellhead blowout preventer is installed at the wellhead of the borehole, the drill rod assembly and the drill bit are arranged in the borehole, the drill rod assembly comprises a plurality of sections of drill rod units which are identical in structure and are sequentially connected from top to bottom, one section of drill rod unit penetrates through the wellhead blowout preventer and is rotatably connected with the wellhead blowout preventer, the upper end of the drill rod unit positioned at the uppermost section is in transmission connection with the power output end of a power driving mechanism, the drill rod unit is cylindrical, the lower end of the drill rod unit is downward and coaxially provided with a connecting raised head, the upper end of the drill rod unit is provided with a connecting groove, and the connecting raised head of the drill rod unit is;
a drill rod partition plate is vertically arranged in each section of drill rod unit, the front side edge and the rear side edge of each drill rod partition plate are in sealing contact with the inner wall of each drill rod unit, the drill rod partition plates are fixed in the drill rod units through partition plate fixing assemblies, the two adjacent upper and lower drill rod partition plates are connected through a partition plate connecting assembly, the interior of each drill rod unit is divided into two independent channels by the drill rod partition plates, the channel on the left side is a drilling fluid output channel, and the channel on the right side is a drilling fluid input channel;
the drilling rod unit positioned at the bottom is marked as a drilling bit fixing rod, the lower end of the drilling bit fixing rod is fixedly connected with a drilling bit connecting rod, a drilling bit is fixedly connected with the lower end of the drilling bit connecting rod, a stratum sealing cylinder is arranged on the outer ring of the lower part of the drilling bit fixing rod, the outer side wall of the stratum sealing cylinder is tightly attached to the inner wall of a well, the stratum sealing cylinder is of a cylindrical structure, the upper part of the stratum sealing cylinder is fixedly connected with an upper annular plate, the lower part of the stratum sealing cylinder is fixedly connected with a lower annular plate, the upper annular plate and the lower annular plate are supported by a plurality of supporting rods which are uniformly distributed along the circumferential direction, three first drilling fluid exchange holes are formed in the lower annular plate of the stratum sealing cylinder, a plurality of second drilling fluid exchange holes which are communicated with the inside of the stratum sealing cylinder, the drilling fluid return partition plate is a semicircular plate and is in sealing connection with the inner wall of the drill bit fixing rod and the left side face of the drill rod partition plate.
The upper part of the inner wall of the drill rod unit is provided with two upper mounting grooves which are symmetrical to each other along the radial direction of the drill rod unit, the lower part of the inner wall of the drill rod unit is provided with two lower mounting grooves which are symmetrical to each other along the radial direction of the drill rod unit, and the two upper mounting grooves and the two lower mounting grooves are respectively provided with a group of the clapboard fixing assemblies in a matched manner;
the partition plate fixing component comprises a partition plate chuck, a spring fixing shaft, a first spring and a second spring, the partition plate chuck is arranged along the radial direction of the drill rod unit and comprises a first connecting plate, a limiting ring and a limiting column, the limiting ring and the limiting column are arranged in the same axial direction, one end of the limiting ring and one end of the limiting column are fixedly connected to the first connecting plate, an annular clamping groove is formed between the limiting ring and the limiting column, one end of the spring fixing shaft is provided with a spring limiting groove in the same axial direction as the spring fixing shaft, the other end of the spring fixing shaft is fixedly connected with a second connecting plate, the second connecting plate is fixedly connected to the drill rod partition plate through a screw, the first spring is sleeved on the outer ring of the spring fixing shaft, the second spring is installed in the spring limiting groove, the spring fixing shaft extends into the annular clamping groove and is in inserting fit with the partition plate chuck, two ends of the first spring are respectively in top pressure, the baffle dop is installed in supporting last mounting groove or in the mounting groove down.
The partition plate connecting assembly comprises an expanding plate, fixing plates, a first pin shaft, a second pin shaft and a third spring, wherein the upper end and the lower end of the drill rod partition plate are respectively provided with an elongated slot along the front-back horizontal direction, the upper elongated slot positioned above is fixedly connected with a first jacking column, the lower elongated slot positioned below is fixedly connected with a second jacking column, the first jacking column and the second jacking column are coaxially arranged with the drill rod unit, the third spring is sleeved on the second jacking column, the expanding plate and the fixing plates are respectively provided with two fixing plates which are positioned at the same horizontal height and respectively fixedly connected on the left side surface and the right side surface of the drill rod partition plate, the two expanding plates are oppositely arranged on the left side and the right side, each expanding plate comprises a jacking portion and a rotating portion, the jacking portion is of a flat plate structure, the rotating portion is of an L-shaped bent plate structure, the two ends of the third spring are respectively in jacking contact with the bottom of the elongated slot and the upper surface of the jacking portion of, the free end of the jacking portion is provided with a front waist-shaped hole and a rear waist-shaped hole which are through, the jacking portions of the two opening plates are hinged through a first hinge pin penetrating through the two waist-shaped holes, the opening plates are hinged on the fixing plate at the corners of the rotating portions through second hinge pins, and when the jacking portions are in the horizontal position, the end faces of the free ends of the rotating portions are parallel to the drill rod partition plate and in jacking contact with the drill rod partition plate.
And a sealing ring is arranged between the connecting convex head of the drill rod unit and the connecting groove of the adjacent drill rod unit.
Fixedly connected with goes up annular step on the lower surface of the last annular plate of formation sealing cylinder, annular step under fixedly connected with on the upper surface of lower annular plate, it sets up with annular step down relatively to go up annular step, the outside of bracing piece is equipped with a plurality of bow reed, the bow reed is the V-arrangement structure, all bow reeds evenly encircle the drill bit dead lever setting along the circumferencial direction of drilling rod unit, the turning surface of bow reed and the inner wall roof pressure contact of formation sealing cylinder, two tip internal surfaces of bow reed respectively with the surface roof pressure contact of last annular step and lower annular step.
By adopting the technical scheme, the invention has the following advantages:
the drilling fluid booster pump can input the drilling fluid in the drilling fluid feed liquor tank into the drilling fluid input channel of the drill rod component, and the drilling fluid recovery pump can pump the drilling fluid in the drilling fluid output channel of the drill rod component out into the drilling fluid recovery tank and then circulate into the drilling fluid feed liquor tank through the drilling fluid circulation pipeline, so that the cyclic utilization of the drilling fluid is formed, the drilling fluid is recycled to the maximum extent, and the drilling cost is reduced.
The drilling fluid return baffle fixedly connected with the lower end of the drilling fluid output channel can prevent the drilling fluid in the drilling fluid input channel from directly entering the drilling fluid output channel.
The drill rod baffle plate in the drill rod component provides structural support for the inner inlet and the inner outlet of the drilling fluid, the drilling fluid completes input and output in the drill rod component under the combined action of the drilling fluid pressure pump and the drilling fluid recovery pump, the material exchange when the drilling fluid is in large-area contact with the stratum is avoided, and the condition that the drilling fluid is greatly lost when the drilling fluid returns to the ground is avoided.
The drilling fluid is input at one end and output at the other end under the combined action of the drilling fluid pressure pump and the drilling fluid recovery pump, and firstly, the rock debris generated in the drilling process can be effectively taken out of the well bottom, so that the back-flow capability of the rock debris is improved, and secondly, the input and the output of the drilling fluid form hydraulic pressure difference, so that the drilling speed of a drill bit is accelerated, and the drilling process is promoted. The invention can control the ECD (equivalent circulating density of drilling fluid) at the bottom of the well and prevent well leakage.
The drill rod separation plates arranged in different drill rod units are connected through the separation plate connecting assembly, when the connecting protruding heads of the drill rod units are screwed into the connecting grooves of the adjacent drill rod units, the first jacking columns at the upper ends of the drill rod separation plates in the adjacent drill rod units overcome the elastic force of the third springs, and push the jacking portions of the opening plates to move upwards, so that the two opening plates are closed, and the connection and the limiting between the drill rod separation plates are realized.
The sealing ring arranged between the connecting convex head of the drill rod unit and the connecting groove of the adjacent drill rod unit enables the drill rod units to be well sealed, and prevents drilling fluid from leaking.
The stratum sealing cylinder is provided with a plurality of bow reeds, and under the action of the bow reeds, the outer side wall of the stratum sealing cylinder is tightly attached to the inner wall of a well hole, so that drilling fluid below the stratum sealing cylinder is prevented from overflowing to the upper side of the stratum sealing cylinder.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the drill stem assembly and drill bit of the present invention;
FIG. 3 is an enlarged partial schematic view at A in FIG. 2;
FIG. 4 is a schematic view of the construction of the drill pipe unit of the present invention;
FIG. 5 is a schematic view of the spring mounting shaft of the present invention;
FIG. 6 is a schematic view of the structure of the spacer chuck of the present invention;
FIG. 7 is a schematic view of a single expansion panel of the present invention;
FIG. 8 is a schematic diagram of a formation seal cartridge according to the present invention.
Detailed Description
As shown in fig. 1 to 8, the left side of fig. 2 is the left direction of the invention, and the arrow direction in fig. 2 is the flow direction of the drilling fluid, the drilling fluid internal-in and internal-out type oil drilling system of the invention comprises a drilling derrick 1, a drilling fluid inlet tank 2, a drilling fluid pressure pump 3, a drilling fluid recovery pump 4, a drilling fluid recovery tank 5, a wellhead blowout preventer 6, a drill rod assembly, a formation sealing cylinder 7 and a drill bit 8;
the drilling derrick comprises a drilling derrick 1, a drilling fluid inlet tank 2, a drilling fluid pressure pump 3, a drilling fluid recovery pump 4 and a drilling fluid recovery tank 5, wherein the drilling derrick 1 is fixed on the surface of a stratum 9, a power driving mechanism is arranged on the drilling derrick 1, the drilling fluid inlet tank 2, the drilling fluid pressure pump 3 and a liquid inlet end 10 of a drilling rod component are sequentially connected along the flowing direction of drilling fluid through pipelines, a liquid return end 11 of the drilling rod component, the drilling fluid recovery pump 4 and the drilling fluid recovery tank 5 are sequentially connected along the flowing direction of drilling fluid through pipelines, and the drilling fluid inlet tank 2 and the drilling fluid recovery tank 5 are connected through a drilling fluid circulating;
a borehole 13 is drilled in a stratum 9 right below the drilling derrick 1 through a drill rod assembly and a drill bit 8, a wellhead blowout preventer 6 is installed at the wellhead of the borehole 13, the drill rod assembly and the drill bit 8 are arranged in the borehole 13, the drill rod assembly comprises a plurality of sections of drill rod units 14 which are identical in structure and are sequentially connected from top to bottom, one section of drill rod unit 14 penetrates through the wellhead blowout preventer 6 and is rotatably connected with the wellhead blowout preventer 6, the upper end of the drill rod unit 14 positioned at the uppermost section is in transmission connection with a power output end of a power driving mechanism, the drill rod unit 14 is cylindrical, the lower end of the drill rod unit 14 is downward coaxially provided with a connecting raised head 15, the upper end of the drill rod unit 14 is provided with a connecting groove 16, and the connecting raised head 15 of the drill rod unit 14 is in threaded connection with;
a drill rod partition plate 17 is vertically arranged in each section of drill rod unit 14, the front side edge and the rear side edge of each drill rod partition plate 17 are in sealing contact with the inner wall of each drill rod unit 14, the drill rod partition plates 17 are fixed in the drill rod units 14 through partition plate fixing assemblies, the drill rod partition plates 17 arranged in different drill rod units 14 are connected through partition plate connecting assemblies, the drill rod partition plates 17 divide the interior of each drill rod unit into two independent channels, the channel on the left side is a drilling fluid output channel 18, and the channel on the right side is a drilling fluid input channel 19;
the drilling rod unit 14 located at the bottom is marked as a drill bit fixing rod 20, the lower end fixedly connected with drill bit connecting rod 21 of the drill bit fixing rod 20, the drill bit 8 is fixedly connected at the lower end of the drill bit connecting rod 21, the stratum sealing cylinder 7 is installed at the lower outer ring of the drill bit fixing rod 20, the outer side wall of the stratum sealing cylinder 7 is tightly attached to the inner wall of the well hole 13, the stratum sealing cylinder 7 is of a cylindrical structure, an upper annular plate 22 is fixedly connected to the upper portion of the stratum sealing cylinder 7, a lower annular plate 23 is fixedly connected to the lower portion of the stratum sealing cylinder 7, the upper annular plate 22 and the lower annular plate 23 are supported by a plurality of supporting rods 24 uniformly distributed along the circumferential direction, three first drilling fluid exchange holes 25 are formed in the lower annular plate 23 of the stratum sealing cylinder 7, a plurality of second drilling fluid exchange holes 26 uniformly communicated with the inside of the stratum sealing cylinder 7 are formed in the circumferential direction in the left semicircle The drilling fluid return partition plate 27 is a semicircular plate, and the drilling fluid return partition plate 27 is hermetically connected with the inner wall of the drill bit fixing rod 20 and the left side surface of the drill rod partition plate 17.
The upper part of the inner wall of the drill rod unit 14 is provided with two symmetrical upper mounting grooves 28 along the radial direction of the drill rod unit 14, the lower part of the inner wall of the drill rod unit 14 is provided with two symmetrical lower mounting grooves 29 along the radial direction of the drill rod unit 14, and a group of the clapboard fixing assemblies are arranged on the two upper mounting grooves 28 and the two lower mounting grooves 29 in a matched manner;
the partition board fixing component comprises a partition board chuck 30 arranged along the radial direction of the drill rod unit 14, a spring fixing shaft 31, a first spring 32 and a second spring 33, the partition board chuck 30 comprises a first connecting plate 34, a limiting ring 35 and a limiting column 36 which are arranged in the same axial direction, one end of the limiting ring 35 and one end of the limiting column 36 are fixedly connected to the first connecting plate 34, an annular clamping groove is formed between the limiting ring 35 and the limiting column 36, one end of the spring fixing shaft 31 is provided with a spring limiting groove 37 which is coaxial with the spring fixing shaft 31, the other end of the spring fixing shaft 31 is fixedly connected with a second connecting plate 38, the second connecting plate 38 is fixedly connected to the drill rod partition board 17 through a screw 39, the first spring 32 is sleeved on the outer ring of the spring fixing shaft 31, the second spring 33 is arranged in the spring limiting groove 37, the spring fixing shaft 31 extends into the annular clamping groove and is in inserted fit with the partition board chuck 30, two ends of the first spring 32, the two ends of the second spring 33 are respectively contacted with the groove bottom of the spring limiting groove 37 and the limiting column 36 in a pressing manner, and the partition plate chuck 30 is arranged in the matched upper mounting groove 28 or lower mounting groove 29.
The partition board connecting assembly comprises an opening board 40, fixing boards 41, a first pin shaft 42, a second pin shaft 43 and a third spring 44, wherein the upper end and the lower end of the drill rod partition board 17 are respectively provided with a long groove along the front-back horizontal direction, the long groove positioned above is fixedly connected with a first jacking column 46, the long groove positioned below is fixedly connected with a second jacking column 45, the first jacking column 46 and the second jacking column 45 are respectively arranged coaxially with the drill rod unit 14, the third spring 44 is sleeved on the second jacking column 45, the opening board 40 and the fixing boards 41 are respectively provided with two, the two fixing boards 41 are positioned at the same horizontal height and are respectively and fixedly connected on the left side surface and the right side surface of the drill rod partition board 17, the two opening boards 40 are oppositely arranged left and right, each opening board 40 comprises a jacking portion 47 and a rotating portion 48, the jacking portion 47 is of a flat board structure, the rotating portion 48 is of an L-shaped bent board structure, the two ends of the third spring 44 are respectively in jacking and pressing contact with the bottom of the long groove, one end of the jacking portion 47 is fixedly connected with one end of the rotating portion 48, a front-back through waist-shaped hole 49 is formed in the free end of the jacking portion 47, the jacking portions 47 of the two opening plates 40 are hinged through first hinge pins 42 penetrating through the two waist-shaped holes 49, the opening plates 40 are hinged to the fixing plate 41 at the corners of the rotating portion 48 through second hinge pins 43, and when the jacking portion 47 is in a horizontal position, the end face of the free end of the rotating portion 48 is parallel to and in jacking contact with the drill rod partition plate 17.
A sealing ring 50 is arranged between the coupling nipple 15 of a drill rod unit 14 and the coupling recess 16 of an adjacent drill rod unit 14. A good seal between the drill pipe units 14 is achieved preventing leakage of drilling fluid.
The lower surface of the upper annular plate 22 of the stratum sealing barrel 7 is fixedly connected with an upper annular step 51, the upper surface of the lower annular plate 23 is fixedly connected with a lower annular step 52, the upper annular step 51 and the lower annular step 52 are arranged oppositely, the outer side of the support rod 24 is provided with a plurality of bow spring pieces 53, the bow spring pieces 53 are of a V-shaped structure, all the bow spring pieces 53 are uniformly arranged around the drill bit fixing rod 20 along the circumferential direction of the drill rod unit 14, the corner outer surfaces of the bow spring pieces 53 are in abutting contact with the inner wall of the stratum sealing barrel 7, and the inner surfaces of two end parts of the bow spring pieces 53 are in abutting contact with the outer surfaces of the upper annular step 51 and the lower annular step 52 respectively. Under the action of the bow spring 53, the outer side wall of the formation sealing barrel 7 is tightly attached to the inner wall of the borehole 13, so that the drilling fluid below the formation sealing barrel 7 is prevented from overflowing to the upper part of the formation sealing barrel 7.
The use process comprises the following steps: firstly, fixing a drill rod clapboard 17 in a drill rod unit 14 through a clapboard fixing component, specifically: the second connecting plates 38 on the spring fixing shafts 31 in each group of partition fixing assemblies are fixedly connected to the drill rod partition 17 through screws 39 respectively, then the first springs 32 are sleeved on the outer rings of the spring fixing shafts 31 respectively, the second springs 33 are installed in the spring limiting grooves 37, the spring fixing shafts 31 are inserted into the partition chuck 30, then the drill rod partition 17 is installed in the corresponding drill rod unit 14, the partition chuck 30 on the upper portion is clamped in the matched upper installation groove 28, and the partition chuck 30 on the lower portion is clamped in the matched lower installation groove 29.
And then the drill rod partition plates 17 arranged in different drill rod units 14 are connected through a partition plate connecting assembly, specifically: when the connecting nose 15 of a drill rod unit 14 is not screwed into the connecting groove 16 of an adjacent drill rod unit 14, the third spring 44 sleeved on the second jacking leg 45 presses the jacking portion 47 of the opening plate 40 downwards, at this time, the two opening plates 40 are in an opening state, namely, the end surface of the free end of the rotating portion 48 of the two opening plates 40 is far away from the drill rod partition 17 in the adjacent drill rod unit 14, the two opening plates 40 cannot limit and connect the drill rod partition 17, when the connecting nose 15 of the drill rod unit 14 is screwed into the connecting groove 16 of the adjacent drill rod unit 14, the first jacking leg 46 at the upper end of the drill rod partition 17 in the adjacent drill rod unit 14 overcomes the elastic force of the third spring 44 to push the jacking portion 47 of the opening plate 40 to move upwards, at this time, the two opening plates 40 are closed, namely, the end surface of the free end of the rotating portion 48 of the two opening plates 40 is close to and finally clings to the drill rod partition 17 in the adjacent drill rod unit 14, the connection and the limit between two adjacent drill rod partition plates 17 are realized, and all the drill rod partition plates 17 are ensured to be positioned on the same plane.
During the well drilling process, during the input drilling fluid, drilling fluid gets into the drilling fluid input channel 19 of drilling rod subassembly from the inlet end 10 of drilling rod subassembly, 8 positions of working of drill bit are entered into to rethread drill bit connecting rod 21 is inside, and supply with drill bit 8, when taking out drilling fluid, drilling fluid gets into the sealed section of thick bamboo 7 of stratum through the three first drilling fluid exchange hole 25 of the sealed section of thick bamboo 7 of drill bit 8 positions of the below space of the sealed section of thick bamboo 7 of stratum, later get into in the drill bit dead lever 20 through the second drilling fluid exchange hole 26 that sets up on the left semicircle of drill bit dead lever 20, and in being taken out drilling fluid recovery tank 5 along drilling fluid output channel 18.
The drilling fluid return baffle plate 27 fixedly connected to the lower end of the drilling fluid outlet channel 18 prevents the drilling fluid in the drilling fluid inlet channel 19 from directly entering the drilling fluid outlet channel 18.
The drilling fluid pressure pump 3 can input the drilling fluid in the drilling fluid inlet tank 2 into a drilling fluid input channel 19 of the drill rod assembly, and the drilling fluid recovery pump 4 can pump the drilling fluid in a drilling fluid output channel 18 of the drill rod assembly into a drilling fluid recovery tank 5 and then circulate into the drilling fluid inlet tank 2 through a drilling fluid circulation pipeline 12, so that the cyclic utilization of the drilling fluid is formed, the drilling fluid is recycled to the maximum extent, and the drilling cost is reduced.
The drill rod partition plate 17 in the drill rod component provides structural support for the internal inlet and the internal outlet of the drilling fluid, the drilling fluid is input and output in the drill rod component under the combined action of the drilling fluid pressure pump 3 and the drilling fluid recovery pump 4, the material exchange between the drilling fluid and the stratum 9 during large-area contact is avoided, and the condition that the drilling fluid is greatly lost when returning to the ground is avoided.
The drilling fluid is input at one end and output at the other end under the combined action of the drilling fluid pressure pump 3 and the drilling fluid recovery pump 4, and firstly, the stone chips generated in the drilling process can be effectively taken out of the well bottom, and secondly, the input and the output of the drilling fluid form hydraulic pressure difference, so that the drilling speed of a drill bit 8 is accelerated, and the drilling process is promoted.
The drilling fluid inlet tank 2, the drilling fluid booster pump 3, the drilling fluid recovery pump 4, the drilling fluid recovery tank 5, the wellhead blowout preventer 6, the drill bit 8 and the bow reed 53 are all conventional devices, and the specific structures are not detailed.
The present embodiment is not intended to limit the shape, material, structure, 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 scope of the technical solution of the present invention.
Claims (5)
1. Drilling fluid advances interior formula oil drilling system that goes out, its characterized in that: the drilling rig comprises a drilling derrick, a drilling fluid inlet tank, a drilling fluid pressure pump, a drilling fluid recovery tank, a wellhead blowout preventer, a drill rod component, a stratum sealing barrel and a drill bit;
the drilling derrick is provided with a power driving mechanism, the drilling fluid inlet tank, the drilling fluid pressure pump and the liquid inlet ends of the drill rod components are sequentially connected along the flowing direction of the drilling fluid through pipelines, the liquid return end of the drill rod component, the drilling fluid recovery pump and the drilling fluid recovery tank are sequentially connected along the flowing direction of the drilling fluid through pipelines, and the drilling fluid inlet tank and the drilling fluid recovery tank are connected through a drilling fluid circulating pipeline;
a borehole is drilled in the stratum right below the drilling derrick by a drill rod assembly and a drill bit, a wellhead blowout preventer is installed at the wellhead of the borehole, the drill rod assembly and the drill bit are arranged in the borehole, the drill rod assembly comprises a plurality of sections of drill rod units which are identical in structure and are sequentially connected from top to bottom, one section of drill rod unit penetrates through the wellhead blowout preventer and is rotatably connected with the wellhead blowout preventer, the upper end of the drill rod unit positioned at the uppermost section is in transmission connection with the power output end of a power driving mechanism, the drill rod unit is cylindrical, the lower end of the drill rod unit is downward and coaxially provided with a connecting raised head, the upper end of the drill rod unit is provided with a connecting groove, and the connecting raised head of the drill rod unit is;
a drill rod partition plate is vertically arranged in each section of drill rod unit, the front side edge and the rear side edge of each drill rod partition plate are in sealing contact with the inner wall of each drill rod unit, the drill rod partition plates are fixed in the drill rod units through partition plate fixing assemblies, the two adjacent upper and lower drill rod partition plates are connected through a partition plate connecting assembly, the interior of each drill rod unit is divided into two independent channels by the drill rod partition plates, the channel on the left side is a drilling fluid output channel, and the channel on the right side is a drilling fluid input channel;
the drilling rod unit positioned at the bottom is marked as a drilling bit fixing rod, the lower end of the drilling bit fixing rod is fixedly connected with a drilling bit connecting rod, a drilling bit is fixedly connected with the lower end of the drilling bit connecting rod, a stratum sealing cylinder is arranged on the outer ring of the lower part of the drilling bit fixing rod, the outer side wall of the stratum sealing cylinder is tightly attached to the inner wall of a well, the stratum sealing cylinder is of a cylindrical structure, the upper part of the stratum sealing cylinder is fixedly connected with an upper annular plate, the lower part of the stratum sealing cylinder is fixedly connected with a lower annular plate, the upper annular plate and the lower annular plate are supported by a plurality of supporting rods which are uniformly distributed along the circumferential direction, three first drilling fluid exchange holes are formed in the lower annular plate of the stratum sealing cylinder, a plurality of second drilling fluid exchange holes which are communicated with the inside of the stratum sealing cylinder, the drilling fluid return partition plate is a semicircular plate and is in sealing connection with the inner wall of the drill bit fixing rod and the left side face of the drill rod partition plate.
2. The in-drilling fluid in-and-out oil drilling system of claim 1, wherein: the upper part of the inner wall of the drill rod unit is provided with two upper mounting grooves which are symmetrical to each other along the radial direction of the drill rod unit, the lower part of the inner wall of the drill rod unit is provided with two lower mounting grooves which are symmetrical to each other along the radial direction of the drill rod unit, and the two upper mounting grooves and the two lower mounting grooves are respectively provided with a group of the clapboard fixing assemblies in a matched manner;
the partition plate fixing component comprises a partition plate chuck, a spring fixing shaft, a first spring and a second spring, the partition plate chuck is arranged along the radial direction of the drill rod unit and comprises a first connecting plate, a limiting ring and a limiting column, the limiting ring and the limiting column are arranged in the same axial direction, one end of the limiting ring and one end of the limiting column are fixedly connected to the first connecting plate, an annular clamping groove is formed between the limiting ring and the limiting column, one end of the spring fixing shaft is provided with a spring limiting groove in the same axial direction as the spring fixing shaft, the other end of the spring fixing shaft is fixedly connected with a second connecting plate, the second connecting plate is fixedly connected to the drill rod partition plate through a screw, the first spring is sleeved on the outer ring of the spring fixing shaft, the second spring is installed in the spring limiting groove, the spring fixing shaft extends into the annular clamping groove and is in inserting fit with the partition plate chuck, two ends of the first spring are respectively in top pressure, the baffle dop is installed in supporting last mounting groove or in the mounting groove down.
3. The in-drilling fluid in-and-out oil drilling system of claim 1, wherein: the partition plate connecting assembly comprises an expanding plate, fixing plates, a first pin shaft, a second pin shaft and a third spring, wherein the upper end and the lower end of the drill rod partition plate are respectively provided with an elongated slot along the front-back horizontal direction, the upper elongated slot positioned above is fixedly connected with a first jacking column, the lower elongated slot positioned below is fixedly connected with a second jacking column, the first jacking column and the second jacking column are coaxially arranged with the drill rod unit, the third spring is sleeved on the second jacking column, the expanding plate and the fixing plates are respectively provided with two fixing plates which are positioned at the same horizontal height and respectively fixedly connected on the left side surface and the right side surface of the drill rod partition plate, the two expanding plates are oppositely arranged on the left side and the right side, each expanding plate comprises a jacking portion and a rotating portion, the jacking portion is of a flat plate structure, the rotating portion is of an L-shaped bent plate structure, the two ends of the third spring are respectively in jacking contact with the bottom of the elongated slot and the upper surface of the jacking portion of, the free end of the jacking portion is provided with a front waist-shaped hole and a rear waist-shaped hole which are through, the jacking portions of the two opening plates are hinged through a first hinge pin penetrating through the two waist-shaped holes, the opening plates are hinged on the fixing plate at the corners of the rotating portions through second hinge pins, and when the jacking portions are in the horizontal position, the end faces of the free ends of the rotating portions are parallel to the drill rod partition plate and in jacking contact with the drill rod partition plate.
4. The in-drilling fluid in-and-out oil drilling system of claim 1, wherein: and a sealing ring is arranged between the connecting convex head of the drill rod unit and the connecting groove of the adjacent drill rod unit.
5. The in-drilling fluid in-and-out oil drilling system of claim 1, wherein: fixedly connected with goes up annular step on the lower surface of the last annular plate of formation sealing cylinder, annular step under fixedly connected with on the upper surface of lower annular plate, it sets up with annular step down relatively to go up annular step, the outside of bracing piece is equipped with a plurality of bow reed, the bow reed is the V-arrangement structure, all bow reeds evenly encircle the drill bit dead lever setting along the circumferencial direction of drilling rod unit, the turning surface of bow reed and the inner wall roof pressure contact of formation sealing cylinder, two tip internal surfaces of bow reed respectively with the surface roof pressure contact of last annular step and lower annular step.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202810680U (en) * | 2012-10-15 | 2013-03-20 | 中国石油天然气集团公司 | Well drilling combination device using double-wall drill pipe |
| CN106761410A (en) * | 2016-12-16 | 2017-05-31 | 河南宇建科技股份有限公司 | A kind of binary channels is bored and develops integrated device |
| CN206267784U (en) * | 2016-12-01 | 2017-06-20 | 周兆弟 | Make the dive unit head that section is non-rectilinear stake |
| CN107429544A (en) * | 2015-01-13 | 2017-12-01 | 沙特阿拉伯石油公司 | Drilling equipment and the method for reducing leakage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2820742A1 (en) * | 2013-07-04 | 2013-09-20 | IOR Canada Ltd. | Improved hydrocarbon recovery process exploiting multiple induced fractures |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202810680U (en) * | 2012-10-15 | 2013-03-20 | 中国石油天然气集团公司 | Well drilling combination device using double-wall drill pipe |
| CN107429544A (en) * | 2015-01-13 | 2017-12-01 | 沙特阿拉伯石油公司 | Drilling equipment and the method for reducing leakage |
| CN206267784U (en) * | 2016-12-01 | 2017-06-20 | 周兆弟 | Make the dive unit head that section is non-rectilinear stake |
| CN106761410A (en) * | 2016-12-16 | 2017-05-31 | 河南宇建科技股份有限公司 | A kind of binary channels is bored and develops integrated device |
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