CN115596384A - Drilling fluid circulating device used during tripping and tripping in drilling process and using method - Google Patents
Drilling fluid circulating device used during tripping and tripping in drilling process and using method Download PDFInfo
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- CN115596384A CN115596384A CN202110780144.3A CN202110780144A CN115596384A CN 115596384 A CN115596384 A CN 115596384A CN 202110780144 A CN202110780144 A CN 202110780144A CN 115596384 A CN115596384 A CN 115596384A
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- 238000005553 drilling Methods 0.000 title claims abstract description 175
- 239000012530 fluid Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 59
- 230000008569 process Effects 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 104
- 230000007246 mechanism Effects 0.000 claims description 100
- 238000007789 sealing Methods 0.000 claims description 92
- 239000007788 liquid Substances 0.000 claims description 33
- 230000008859 change Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 18
- 210000003128 head Anatomy 0.000 description 10
- 239000003921 oil Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 6
- 239000010720 hydraulic oil Substances 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000005465 channeling Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
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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
-
- 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
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
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- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses a drilling fluid circulating device used during tripping and tripping in a drilling process and a using method thereof. In the tripping process, the problem of pollution of drilling fluid in a drill rod with a drill floor taken out is solved, and meanwhile, high-density pressurized water hole slurry is not needed to be injected, so that the problem that a drilling fluid system in a well is damaged is avoided; in the drilling process, a complex top drive connection process is not needed, potential safety hazards caused by excessive abrasion of a top drive joint are avoided, drilling fluid circulation can be conveniently and quickly established in the drilling process during the drilling pulling and the drilling operation, and the whole drilling pulling and drilling safety is improved.
Description
Technical Field
The invention relates to the technical field of drilling engineering and development of petroleum, natural gas and geothermal resources, in particular to a drilling fluid circulating device used in the process of tripping and tripping in a drilling process and a using method thereof.
Background
In the development process of petroleum, natural gas and geothermal resources, drilling is an important project for establishing a fluid channel, in the drilling process, a downhole operation tool is replaced, tripping operation and tripping operation are needed when complex working conditions are processed, and multiple tripping operations and tripping operations are needed for completing the drilling process of one well, wherein the tripping operation and the tripping operation respectively mean that a drilling tool is taken out of a well hole and lowered into the well hole.
The drilling rod water hole is communicated with the annulus between the drilling rod and the well wall to form the circulation of the drilling fluid, namely the drilling fluid is injected into the well from the drilling rod water hole, and the drilling fluid injected into the well flows out from the well head through the annulus between the drilling rod and the well wall to realize the cooling in the well. The multi-column drill rod that connects gradually that need go into in the well takes out from the well when the tripping operation, because the drilling rod water hole of every post drilling rod has been full of drilling fluid, at the tripping operation in-process, if do not handle the drilling fluid in the drilling rod that needs to take out, then when the drilling rod is taken out the back, can lead to the drilling fluid pollution in the drilling rod that the rig floor was taken out. Therefore, in order to maintain a clean and safe working environment of the drilling platform surface, the drilling fluid in the drill rod to be taken out must be treated in advance, and the treatment method adopted at present is as follows: the drilling fluid with the density higher than that of the drilling fluid in the well is injected into a water hole of the drill rod, the drilling fluid is generally called pressurized-water hole mud, the injected pressurized-water hole mud with the density higher than that of the drilling fluid in the well is utilized, the liquid level of the drilling fluid in the water hole of the drill rod can be lowered, and after the liquid level in the drill rod is lowered, the drill rods without the drilling fluid in multiple columns are taken out and disassembled, so that the problem that the drilling platform surface is polluted by the drilling fluid in the drill rod which is taken out is effectively avoided. In the process of deep well operation, a large amount of high-density pressurized water eye slurry is often required to be injected, but the pressurized water eye slurry injected into the well disturbs a drilling fluid system in the well, and special conditions such as well leakage and misjudgment of the underground condition are easily caused; in particular, after drilling an oil and gas layer, the field needs to measure the oil and gas channeling speed through short tripping and short tripping (generally called as short tripping tool), generally, the short tripping tool is ten to fifteen columns, the drilling needs to be stopped after a period of rest to establish circulation, if the channeling speed does not meet the tripping requirement, the density and viscosity of drilling fluid need to be adjusted to stabilize the oil and gas layer, and the field may need to perform multiple short tripping operations. The short drilling tool operation of tripping does not inject the mud pressure port of the pressure port, the drilling rod port overflows more mud to pollute the drilling platform surface during tripping, and the injection of the mud of the pressure port needs to accurately calculate the injection amount and complex operation processes of weighting, replacing the mud, unloading the top drive and the like, and is easy to disturb the drilling fluid system, so that the field operation is often disturbed by the contradiction.
During the drilling process, it is often necessary to establish a drill pipe water hole-annulus circulation. For example, the viscosity of the drilling fluid in the well is increased due to the fact that the drilling fluid does not circulate for a long time, and in order to prevent the formation from being pressed and leaked due to the fact that overlarge initial pressure is needed in the circulation process of the drilling fluid at the bottom of the well, a segmented top-through and circulation method is adopted in the drilling process; in addition, to keep temperature sensitive equipment safe downhole, drilling fluid circulation needs to be established to cool down downhole tools during the drilling process. The existing method for establishing circulation is to connect the top drive, and the connection of the top drive usually needs more complicated procedures and longer time, so that the whole drilling and tripping operation time is increased, and meanwhile, the top drive joint is easily abraded excessively to form potential safety hazards.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a drilling fluid circulating device and a using method thereof used during tripping-in and tripping-out in the drilling process, which solve the problem of drilling fluid pollution in a drill rod with a drilling platform taken out in the tripping-in process, and simultaneously avoid the problem that a drilling fluid system in a well is damaged because high-density pressurized water hole slurry is not needed to be injected; in the process of drilling down, a complex top drive connection process is not needed, potential safety hazards caused by excessive abrasion of a top drive joint are avoided, drilling fluid circulation can be conveniently and quickly achieved during the drilling process of drilling up and down, and the overall efficiency and safety of drilling up and down are improved.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the utility model provides a drilling fluid circulating device who uses when well drilling in-process tripping operation and lower drilling, includes the first pipeline that both ends link up, the one end of first pipeline is connected with supplies liquid and gas supply system, be fixed with locking mechanism and sealing mechanism on the first pipeline, first pipeline locking mechanism and sealing mechanism homoenergetic stretches into in the drilling rod water hole, locking mechanism be used for with first pipeline locking is fixed at drilling rod water hole inner wall, sealing mechanism is used for sealing up the drilling rod water hole.
Furthermore, the locking mechanism comprises a locking seat sleeved on the first pipeline, at least two first high-pressure cavities are uniformly distributed on the outer side wall of the locking seat along the circumferential direction of the locking seat, an arc-shaped lock is movably connected in each first high-pressure cavity, locking threads matched with threads on the inner wall of a drill pipe water hole are arranged on the outer arc surface of the arc-shaped lock, the inner arc surface of the arc-shaped lock is connected with the corresponding first high-pressure cavity through an elastic piece, and the elastic piece exerts a pulling force towards the pipe wall of the first pipeline on the arc-shaped lock;
the locking seat is provided with a first pressurizing opening and a first pressure relief opening which are communicated with any first high-pressure cavity, and the first high-pressure cavities are communicated with one another.
Further, sealing mechanism establishes including the cover seal receptacle on the first pipeline, the ring channel has been seted up along self circumference on the lateral wall of seal receptacle, the ring channel is the big gradual change structure in mouth little end, the matching is provided with the sealing plug in the ring channel, the sealing plug with it has second high-pressure chamber to reserve between the bottom of ring channel, set up on the seal receptacle with second pressure port and second pressure release mouth of second high-pressure chamber intercommunication.
Further, the liquid supply and gas supply system comprises a second pipeline, and an air pump and a liquid pump which are connected to the second pipeline, and the second pipeline is communicated with the first pipeline.
Furthermore, the second pipeline is connected with the first pipeline through a four-way pipe, a first end of the four-way pipe is connected with the second pipeline, a first valve is arranged at the first end of the four-way pipe, a second end of the four-way pipe is connected with the first pipeline, a second valve is arranged at a third end of the four-way pipe, a safety valve is arranged at a fourth end of the four-way pipe, and a third valve is arranged on the second pipeline close to the air pump.
Further, a pressure gauge is further arranged at the first end of the four-way pipe.
Furthermore, the bottom of the first pipeline is connected with a guide head, the guide head is hemispherical, and a plurality of filter holes are formed in the position, close to the bottom, of the side wall of the first pipeline.
Furthermore, an ultrasonic distance meter is arranged at a position close to the bottom in the first pipeline.
Furthermore, a limiting cover is arranged at a position, close to the top, in the first pipeline, the diameter of the limiting cover is not smaller than the inner diameter of the drill rod water hole, and a through hole is formed in the limiting cover.
A method of using a drilling fluid circulation assembly for tripping and tripping during drilling operations, comprising:
during the drill pulling operation, the first pipeline, the locking mechanism and the sealing mechanism extend into a drill rod water hole, the locking mechanism is controlled to lock and fix the first pipeline on the inner wall of the drill rod water hole, the sealing mechanism is controlled to seal the drill rod water hole, the gas supply system is controlled to inject high-pressure gas into the drill rod water hole through the first pipeline, after the high-pressure gas presses the liquid level in the drill rod water hole to a first target position, the locking mechanism and the sealing mechanism are controlled to be separated from the inner wall of the drill rod water hole, the first pipeline, the locking mechanism and the sealing mechanism are taken out of the drill rod water hole, and a drill rod above the first target position is taken out;
during the operation of drilling down, will first pipeline locking mechanism and sealing mechanism stretches into in the drilling rod water hole, control locking mechanism will first pipeline locking is fixed at drilling rod water hole inner wall, control sealing mechanism seals the drilling rod water hole, control the liquid supply system passes through first pipeline injects drilling fluid in to the drilling rod water hole, has set up drilling rod water hole-annular space circulation, after treating to drill down to the second target position, control locking mechanism with sealing mechanism breaks away from the drilling rod water hole inner wall, will first pipeline locking mechanism and sealing mechanism takes out from the drilling rod water hole.
Compared with the prior art, the invention has at least the following beneficial effects: the invention provides a drilling fluid circulating device for tripping and tripping in a drilling process, which is used for assisting in well circulating drilling fluid during tripping operation and tripping operation in the drilling process. Therefore, after the device is utilized, the problem of pollution of drilling fluid in a drill rod with a drill floor taken out is solved, and high-density pressurized water hole slurry is not needed to be injected, so that the problem that a drilling fluid system in a well is damaged is avoided. When the drilling operation is carried out, the first pipeline, the locking mechanism and the sealing mechanism extend into the drill rod water hole, the locking mechanism is controlled to lock and fix the first pipeline on the inner wall of the drill rod water hole, the sealing mechanism is controlled to seal the drill rod water hole, the liquid supply system is controlled to inject drilling liquid into the drill rod water hole through the first pipeline, drill rod water hole-annulus circulation is established, after the drilling operation is carried out to the second target position, continuous circulation cooling of the drilling liquid above the second target position is achieved, for example, the second target position is a top-through or circulation completion position, at the moment, the locking mechanism and the sealing mechanism are controlled to be separated from the inner wall of the drill rod water hole, and the first pipeline, the locking mechanism and the sealing mechanism are taken out of the drill rod water hole. Therefore, after the device is used, the traditional complex top drive connection process is not needed in the drilling process, the potential safety hazard caused by excessive abrasion of the top drive joint is avoided, the circulation of drilling fluid during the drilling and tripping operation in the drilling process can be conveniently and rapidly established, and the overall efficiency and safety of the drilling and tripping are improved.
The locking mechanism comprises a locking seat sleeved on a first pipeline, and the drilling fluid circulating device is fixed by arc-shaped locks uniformly distributed on the outer side wall of the locking seat, specifically, locking threads matched with threads on the inner wall of a drill pipe water hole are arranged on the outer arc surface of the arc-shaped locks, the inner arc surfaces of the arc-shaped locks are connected with corresponding first high-pressure cavities by elastic members, the elastic members apply tension towards the wall of the first pipeline to the arc-shaped locks, when high-pressure oil is not introduced into the first high-pressure cavities, the arc-shaped locks are attached to the side wall of the locking seat under the action of the tension of the elastic members, and when a first pressurizing port which is arranged on the locking seat and communicated with the first high-pressure cavities is connected to a drilling platform machine hydraulic station, the high-pressure oil enters the first high-pressure cavities, and the arc-shaped locks are pushed to the inner side wall of the drill pipe water hole under the action of the pressure, and because the inner side wall of the drill pipe water hole is provided with the threads matched with the locking threads on the outer arc-shaped locks, the inner side wall of the drill pipe water hole, the drilling fluid circulating device and the drill pipe water hole are firmly locked reliably under the action of the threads, and the matching of the high-pressure gas, and the stability of the drilling fluid circulating device is ensured when the drilling fluid circulating device is required to be pumped; when needs are with arc tool to lock and drilling rod water hole inner wall unblock, only need discharge high pressure oil through first pressure release mouth, then arc tool to lock closes the locking seat under the restoring force effect of elastic component, accomplishes the unblock.
The sealing mechanism comprises a sealing seat sleeved on the first pipeline, wherein an annular groove is formed in the outer side wall of the sealing seat along the circumferential direction of the sealing seat, the annular groove is designed to be of a gradual change structure with a small opening and a large bottom, a sealing plug is installed in the annular groove, a second high-pressure cavity is reserved between the sealing plug and the bottom of the annular groove, a second pressure opening and a second pressure relief opening which are communicated with the second high-pressure cavity are formed in the sealing seat, when the drill rod water hole needs to be sealed, high-pressure oil only needs to be introduced into the second pressure opening, the high-pressure oil enters the second high-pressure cavity, the sealing plug is pushed out towards the position close to the inner wall of the drill rod water hole under the action of pressure, the sealing of the drill rod water hole is achieved, when the sealing needs to be relieved, the high-pressure oil in the second high-pressure cavity only needs to be discharged through the second pressure relief opening, and the sealing plug is of the gradual change structure with the small opening and the large bottom, so that the sealing plug automatically returns into the annular groove under the action of deformation recovery, the sealing of the drill rod water hole is relieved.
Furthermore, the second pipeline can be connected with the first pipeline by utilizing the four-way pipe, and the first end of the four-way pipe is provided with the first valve, so that the speed of inputting a medium into the first pipeline can be conveniently controlled; similarly, a second valve is arranged at the third end of the four-way pipe, the third end serves as an output end, and the speed of the output medium is conveniently controlled through the second valve; in addition, a safety valve is arranged at the fourth end of the four-way pipe, so that the use safety of the whole device is improved. According to the invention, the third valve is arranged on the second pipeline close to the air pump, and the flow rate of the air is controlled through the third valve, so that the operation is convenient.
Furthermore, a pressure gauge is arranged at the first end of the four-way pipe, so that the pressure condition in the drilling fluid circulating device can be monitored in real time conveniently, and the pressure can be ensured to be within a safety range by regulating and controlling the opening of the valve in time.
Further, the bottom of first pipeline is connected with the guide head, and the guide head is hemispherical, and hemispherical guide head can effectually prevent to be blocked by the foreign matter at the in-process of going into the drilling rod water hole under, ensures that the process of operation is more smooth. A plurality of filter holes are formed in the position, close to the bottom, on the side wall of the first pipeline, impurities in drilling fluid can be effectively filtered to enter the drill rod water hole, and the drill rod water hole is prevented from being blocked.
Furthermore, the ultrasonic distance measuring instrument is arranged at a position close to the bottom in the first pipeline, the distance from the bottom of the first pipeline to the liquid level below can be accurately detected in real time by using the ultrasonic distance measuring instrument, and then an operator can conveniently master the distance of the liquid level descending in real time, so that whether the liquid level descends below a drill rod to be taken out or not can be conveniently determined, and the surface of the drill rod can be better prevented from being polluted.
Furthermore, a limiting cover is arranged in the first pipeline and close to the top, the diameter of the limiting cover is not smaller than the inner diameter of the drill rod water hole, a through hole is formed in the limiting cover, a high-pressure pipeline can conveniently penetrate through the through hole, the limiting cover is covered above the drill rod water hole, the whole drilling fluid circulating device is limited, and sundries are prevented from falling into the water hole.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the overall construction of a drilling fluid circulation system for tripping and tripping during drilling operations according to the present invention;
FIG. 2 is a three-dimensional structure diagram of the first pipe, the locking mechanism, the sealing mechanism and the four-way pipe in FIG. 1;
FIG. 3 is a three-dimensional block diagram of the locking mechanism of FIG. 1;
fig. 4 is a three-dimensional structural view of the sealing mechanism in fig. 1.
1-a first conduit; 2-a locking mechanism; 201-locking seat; 202-a first high pressure chamber; 203-arc lock; 204-an elastic member; 205-locking threads; 206-a first pressurization port; 207-first pressure relief vent;
3-a sealing mechanism; 301-a sealing seat; 302-an annular groove; 303-sealing plug; 304-a second high pressure chamber; 305-a second pressurization port; 306-a second pressure relief vent;
4-a second conduit; 5, an air pump; 6-liquid pump; 7-a four-way pipe; 8-a first valve; 9-a second valve; 10-safety valve; 11-pressure gauge; 12-a third valve; 13-a guide head; 14-filtration pores; 15-ultrasonic distance measuring instrument; 16-a limit cover; 17-through holes.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in figure 1, the drilling fluid circulating device used during tripping and tripping in a drilling process comprises a first pipeline 1 with two through ends, wherein one end of the first pipeline 1 is connected with a fluid supply and gas supply system which is used for supplying high-pressure gas and drilling fluid into the first pipeline 1, a locking mechanism 2 and a sealing mechanism 3 are fixed on the first pipeline 1, the locking mechanism 2 and the sealing mechanism 3 can extend into a drill rod water hole, the locking mechanism 2 is used for locking and fixing the first pipeline 1 on the inner wall of the drill rod water hole, and the sealing mechanism 3 is used for sealing the drill rod water hole. Specifically, when in use, the following two working conditions are adopted:
when the drill is pulled out, firstly, a first pipeline 1, a locking mechanism 2 and a sealing mechanism 3 extend into a drill rod water hole, the locking mechanism 2 is controlled to lock and fix the first pipeline 1 on the inner wall of the drill rod water hole, the sealing mechanism 3 is controlled to seal the drill rod water hole, then, a gas supply system is controlled to inject high-pressure gas into the drill rod water hole through the first pipeline 1, after the high-pressure gas presses the liquid level in the drill rod water hole to a first target position, the locking mechanism 2 and the sealing mechanism 3 are controlled to be separated from the inner wall of the drill rod water hole, finally, the first pipeline 1, the locking mechanism 2 and the sealing mechanism 3 are taken out of the drill rod water hole, and the drill rod above the first target position is taken out;
when the drilling operation is carried out, firstly, the first pipeline 1, the locking mechanism 2 and the sealing mechanism 3 extend into a drill rod water hole, the locking mechanism 2 is controlled to lock and fix the first pipeline 1 on the inner wall of the drill rod water hole, the sealing mechanism 3 is controlled to seal the drill rod water hole, then, the liquid supply system is controlled to inject drilling liquid into the drill rod water hole through the first pipeline 1, drill rod water hole-annulus circulation is established, namely, the drilling liquid takes underground heat out of the drill hole from the annulus, after the drilling operation is carried out to a second target position, the locking mechanism 2 and the sealing mechanism 3 are controlled to be separated from the inner wall of the drill rod water hole, and finally, the first pipeline 1, the locking mechanism 2 and the sealing mechanism 3 are taken out of the drill rod water hole.
As shown in fig. 1, preferably, a guide head 13 is connected to the bottom of the first pipe 1, the guide head 13 is hemispherical, and the hemispherical guide head 13 can effectively prevent from being stuck by foreign objects in the process of being inserted into the drill pipe port, thereby ensuring a smoother operation process. A plurality of filtration pores 14 have been seted up near the position of bottom on first pipeline 1 lateral wall, impurity in can effectual filtration drilling fluid gets into the drilling rod eye, prevents that the drilling rod eye from blockking up. Be close to the position of bottom in first pipeline 1 and be provided with ultrasonic ranging appearance 15, utilize ultrasonic ranging appearance 15 can be real-time accurate survey first pipeline bottom apart from the distance of below liquid level, and then be convenient for the operation personnel master the distance that the liquid level descends in real time to whether confirm the liquid level descend to the below of the drilling rod that needs take out, the better drilling platform face that prevents is polluted.
As a specific embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 3, the locking mechanism 2 includes a locking seat 201 sleeved on the first pipeline 1, in this embodiment, the locking seat 201 is welded on the first pipeline 1, the locking seat 201 is disposed near the top of the first pipeline 1, at least two first high pressure cavities 202 are uniformly distributed on the outer side wall of the locking seat 201 along the circumferential direction thereof, an arc-shaped lock 203 is movably connected in each first high pressure cavity 202, in this embodiment, three first high pressure cavities 202 are uniformly distributed on the outer side wall of the locking seat 201 along the circumferential direction thereof; the extrados of arc tool to lock 203 is seted up with the locking screw thread 205 of the screw thread assorted on the drilling rod water hole inner wall, is connected through elastic component 204 between the intrados of arc tool to lock 203 and the first high pressure chamber 202 that corresponds, and elastic component 204 exerts the pulling force towards first pipeline 1 pipe wall to arc tool to lock 203, and in this embodiment, elastic component 204 is the extension spring. A first pressure port 206 and a first pressure relief port 207 which are communicated with any one of the first high-pressure cavities 202 are formed in the locking seat 201, and each first high-pressure cavity 202 is communicated with each other, in the embodiment, the first pressure port 206 is formed above one of the first high-pressure cavities 202, the first pressure relief port 207 is formed above the other first high-pressure cavity 202, the first pressure port 206 is communicated with a hydraulic station of a drill stand tool, when locking is needed, hydraulic oil is injected into the first high-pressure cavity 202 through the first pressure port 206 by controlling the hydraulic station of the drill stand tool, and the arc-shaped lock 203 is close to the side wall of a drill pipe water hole under the action of high pressure to realize reliable locking of thread fit; when needing the unblock, discharge high-pressure oil through first pressure release mouth 207, under the pulling force effect of elastic component 204, arc tool to lock 203 laminates to locking seat 201 on, accomplishes the unblock.
As a specific embodiment of the present invention, as shown in fig. 1, 2 and 4, the sealing mechanism 3 includes a sealing seat 301 sleeved on the first pipeline 1, in this embodiment, the sealing seat 301 is welded on the first pipeline 1, the sealing seat 301 is disposed closely under the locking seat 201, an annular groove 302 is formed on an outer side wall of the sealing seat 301 along a circumferential direction thereof, the annular groove 302 is a gradual change structure with a small opening and a large bottom, a sealing plug 303 is disposed in the annular groove 302 in a matching manner, a second high pressure chamber 304 is reserved between the sealing plug 303 and a bottom of the annular groove 302, a second pressure port 305 and a second pressure relief port 306 which are communicated with the second high pressure chamber 304 are formed on the sealing seat 301, in this embodiment, the second pressure port 305 and the second pressure relief port 306 are communicated with the first high pressure chamber 202, when hydraulic oil is injected into the first high pressure chamber 202, the hydraulic oil also enters the second high pressure chamber 304, the sealing plug 303 moves to a position close to an inner wall of the drill pipe water hole under a high pressure, sealing of the sealing plug 303 is achieved, and when the drill pipe needs to be unsealed, the hydraulic oil is discharged back to the annular groove 303 through the small pressure relief port 306, and the sealing plug 303 is automatically recovered to the annular groove 303. In this embodiment, the sealing plug 303 is made of rubber.
As shown in fig. 1, preferably, a limiting cover 16 is arranged in the first pipe 1 near the top, the diameter of the limiting cover 16 is not smaller than the inner diameter of the drill rod water hole, a through hole 17 is formed in the limiting cover 16, when in use, the first pipe 1, the locking mechanism 2 and the sealing mechanism 3 are extended into the drill rod water hole, at this time, the limiting cover 16 covers the upper end of the drill rod water hole to assist limiting, and the through hole 17 is used for allowing a pipeline connecting the pressure inlet and the pressure outlet to pass through.
As a specific embodiment of the present invention, as shown in fig. 1 and fig. 2, the liquid supply and gas supply system includes a second pipeline 4, and an air pump 5 and a liquid pump 6 connected to the second pipeline 4, a third valve 12 is disposed on the second pipeline 4 near the air pump 5, so as to facilitate regulation and control of the flow rate of the gas and further control of stable pressurization, and the second pipeline 4 is communicated with the first pipeline 1. Specifically, the second pipeline 4 is connected with the first pipeline 1 through a four-way pipe 7, a first end of the four-way pipe 7 is connected with the second pipeline 4, a first valve 8 is arranged at the first end of the four-way pipe 7, and the speed of gas and liquid introduced into the first pipeline 1 is regulated and controlled through the first valve 8, more preferably, a pressure gauge 11 is further arranged at the first end of the four-way pipe 7, so that the pressure of the system can be monitored in real time, and further the pressure can be regulated according to actual conditions; the second end of the four-way pipe 7 is connected with the first pipeline 1; the third end of the four-way pipe 7 is used as an output end of gas and hydraulic oil during pressure relief, and a second valve 9 is arranged at the third end of the four-way pipe 7, so that stable pressure relief in the pressure relief process can be conveniently regulated; and a safety valve 10 is arranged at the fourth end of the four-way pipe 7, so that the safety of the system is improved.
The invention relates to a using method of a drilling fluid circulating device used in tripping-out and tripping-in processes in a drilling process, which comprises the following steps:
when the drilling process establishes a cycle:
the method comprises the following steps: drilling down to the required circulation well depth (the conditions of top circulation or circulation cooling and the like are required), and extending the first pipeline 1, the locking mechanism 2 and the sealing mechanism 3 into the water hole of the drill rod;
step two: the lower end face of the sealing mechanism 3 is superposed with an inner step of the drilling tool, and the circulating device is stably seated on a female buckle of the well mouth drilling tool;
step three: a hydraulic station of a control machine tool pressurizes a locking mechanism and a sealing mechanism, an arc-shaped lockset 203 is ejected, a locking thread 205 is matched with a drilling tool female buckle to form locking, and a sealing plug 303 is ejected to form sealing;
step four: opening a first valve 8, and controlling a liquid pump 6 to inject drilling fluid into a drill rod water hole well;
step five: after the top-opening or the circulation is finished, stopping the pump, and opening the second valve 9 of the outlet to release the pressure;
step six: opening the third valve 12, and starting the air pump purging circulation device until no drilling fluid flows out from the outlet;
step seven: closing the first valve 8 and the third valve 12, and taking out the circulating device;
step eight: and continuing to drill down to the required circulating well depth, and repeating the steps from the first step to the seventh step.
During tripping (short tripping):
the method comprises the following steps: the top drive and the thread buckle of the drilling tool in the well are disassembled, and the first pipeline 1, the locking mechanism 2 and the sealing mechanism 3 are inserted into the water hole of the drill rod;
step two: the lower end face of the sealing mechanism 3 is superposed with an inner step of the drilling tool, and the circulating device is stably seated on a female buckle of the well mouth drilling tool;
step three: a hydraulic station of a control machine tool pressurizes a locking mechanism and a sealing mechanism, an arc-shaped lockset 203 is ejected, a locking thread 205 is matched with a drilling tool female buckle to form locking, and a sealing plug 303 is ejected to form sealing;
step four: opening the first valve 8 and the third valve 12, controlling the air pump 5 to inject high-pressure air into the drill rod water hole well, measuring the liquid level height in the water hole in real time by the ultrasonic distance meter 15, and stopping the pump when the liquid level drops to the position below the drill rods of the 3 rd to 5 th columns;
step five: the second valve 9 at the outlet is opened to release pressure, and as known by all persons in the field, the liquid level in the water hole cannot rise due to the one-way valve in the well;
step six: closing the first valve 8 and the third valve 12, and taking out the circulating device;
step seven: taking out the 3 rd to 5 th drill rods without the drilling fluid in the water eyes of the drill rods in the fourth step;
step eight: and after the drill rod is pulled out, repeating the steps from one step to seven until the required drill rod is pulled out.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the following descriptions are only illustrative and not restrictive, and that the scope of the present invention is not limited to the above embodiments: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a drilling fluid circulating device who uses when well drilling in-process tripping operation and lower drilling, its characterized in that, first pipeline (1) including both ends link up, the one end of first pipeline (1) is connected with supplies liquid and gas supply system, be fixed with locking mechanism (2) and sealing mechanism (3) on first pipeline (1), first pipeline (1) locking mechanism (2) and sealing mechanism (3) homoenergetic can stretch into in the drilling rod water hole, locking mechanism (2) be used for with first pipeline (1) locking is fixed at drilling rod water hole inner wall, sealing mechanism (3) are used for sealing up the drilling rod water hole.
2. The drilling fluid circulating device used during the tripping and the tripping in the drilling process according to claim 1, wherein the locking mechanism (2) comprises a locking seat (201) sleeved on the first pipeline (1), at least two first high-pressure cavities (202) are uniformly distributed on the outer side wall of the locking seat (201) along the circumferential direction of the locking seat, an arc-shaped lock (203) is movably connected in each first high-pressure cavity (202), locking threads (205) matched with threads on the inner wall of a water eye of a drill rod are arranged on the outer arc surface of the arc-shaped lock (203), the inner arc surface of the arc-shaped lock (203) is connected with the corresponding first high-pressure cavity (202) through an elastic part (204), and the elastic part (204) applies a pulling force towards the pipe wall of the first pipeline (1) to the arc-shaped lock (203);
the locking seat (201) is provided with a first pressurization port (206) and a first pressure relief port (207) which are communicated with any one of the first high-pressure cavities (202), and the first high-pressure cavities (202) are communicated with each other.
3. The drilling fluid circulating device used during tripping and tripping in a drilling process according to claim 1, wherein the sealing mechanism (3) comprises a sealing seat (301) sleeved on the first pipeline (1), an annular groove (302) is formed in the outer side wall of the sealing seat (301) along the circumferential direction of the sealing seat, the annular groove (302) is of a gradual change structure with a small opening and a large bottom, a sealing plug (303) is arranged in the annular groove (302) in a matching manner, a second high-pressure cavity (304) is reserved between the sealing plug (303) and the bottom of the annular groove (302), and a second pressurizing opening (305) and a second pressure relief opening (306) communicated with the second high-pressure cavity (304) are formed in the sealing seat (301).
4. Drilling fluid circulation unit for tripping and tripping in a drilling process according to claim 1, characterised in that the liquid and gas supply system comprises a second pipe (4) and a gas pump (5) and a liquid pump (6) connected to the second pipe (4), the second pipe (4) being in communication with the first pipe (1).
5. A drilling fluid circulation device for tripping and tripping in a drilling process according to claim 4, characterized in that the second pipe (4) is connected with the first pipe (1) through a four-way pipe (7), the first end of the four-way pipe (7) is connected with the second pipe (4), the first end of the four-way pipe (7) is provided with a first valve (8), the second end of the four-way pipe (7) is connected with the first pipe (1), the third end of the four-way pipe (7) is provided with a second valve (9), the fourth end of the four-way pipe (7) is provided with a safety valve (10), and the second pipe (4) is provided with a third valve (12) near the air pump (5).
6. A device for circulation of drilling fluid during tripping in and tripping out of a borehole according to claim 5, characterized in that the first end of the cross pipe (7) is provided with a pressure gauge (11).
7. The drilling fluid circulating device used during tripping and tripping in a drilling process according to claim 1, characterized in that the bottom of the first pipeline (1) is connected with a guide head (13), the guide head (13) is hemispherical, and a plurality of filtering holes (14) are arranged on the side wall of the first pipeline (1) near the bottom.
8. Drilling fluid circulation device for tripping and tripping in drilling operations according to claim 1, characterised in that an ultrasonic distance meter (15) is arranged in the first pipe (1) near the bottom.
9. The drilling fluid circulation device for tripping in and tripping out during drilling according to claim 1, characterized in that a position close to the top in the first pipe (1) is provided with a limit cover (16), the diameter of the limit cover (16) is not less than the inner diameter of a drill pipe water hole, and the limit cover (16) is provided with a through hole (17).
10. A method of using a drilling fluid circulation assembly for tripping in and tripping out of a borehole according to any of claims 1 to 9, comprising:
when the drill pipe is pulled out, the first pipeline (1), the locking mechanism (2) and the sealing mechanism (3) extend into a drill pipe water hole, the locking mechanism (2) is controlled to lock and fix the first pipeline (1) on the inner wall of the drill pipe water hole, the sealing mechanism (3) is controlled to seal the drill pipe water hole, the gas supply system is controlled to inject high-pressure gas into the drill pipe water hole through the first pipeline (1), after the high-pressure gas presses the liquid level in the drill pipe water hole to a first target position, the locking mechanism (2) and the sealing mechanism (3) are controlled to be separated from the inner wall of the drill pipe water hole, the first pipeline (1), the locking mechanism (2) and the sealing mechanism (3) are taken out of the drill pipe water hole, and the drill pipe above the first target position is taken out;
when the operation of drilling down, will first pipeline (1) locking mechanism (2) and sealing mechanism (3) stretch into the drilling rod water hole, control locking mechanism (2) will first pipeline (1) locking is fixed at drilling rod water hole inner wall, control sealing mechanism (3) are sealed with the drilling rod water hole, control the liquid supply system passes through first pipeline (1) injects drilling fluid in to the drilling rod water hole, has set up drilling rod water hole-annular space circulation, treats to drill down to the second target position after, control locking mechanism (2) with sealing mechanism (3) break away from the drilling rod water hole inner wall, will first pipeline (1) locking mechanism (2) and sealing mechanism (3) take out from the drilling rod water hole.
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| CN202110780144.3A CN115596384A (en) | 2021-07-09 | 2021-07-09 | Drilling fluid circulating device used during tripping and tripping in drilling process and using method |
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