CN219691505U - Novel pressure-control drilling system - Google Patents
Novel pressure-control drilling system Download PDFInfo
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- CN219691505U CN219691505U CN202320939407.5U CN202320939407U CN219691505U CN 219691505 U CN219691505 U CN 219691505U CN 202320939407 U CN202320939407 U CN 202320939407U CN 219691505 U CN219691505 U CN 219691505U
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Abstract
The utility model provides a novel pressure control drilling system, which relates to the technical field of oil and gas field drilling, and aims to solve the problems that the drilling fluid is difficult to find and process in time after being polluted and the like due to the fact that the circulating use of the drilling fluid is always in the process of being difficult to realize by adding a drilling fluid purifying treatment system on the basis of a fine pressure control drilling system, judging whether the returned drilling fluid is polluted in time, selecting whether to purify the drilling fluid or not, performing corresponding decontamination operation according to the actual pollution condition of the drilling fluid, and re-checking after the primary purification is finished, returning to a purifying assembly after the re-checking is unqualified until the use standard of the drilling fluid is recovered or the emission standard is met.
Description
Technical Field
The utility model relates to the technical field of oil and gas field drilling, in particular to a novel pressure control drilling system.
Background
The fine pressure control drilling system is a carrier of the fine pressure control drilling process technology, realizes well drilling by looking at bottom hole pressure, and can effectively solve complex accidents such as lost circulation, kick, well wall instability, drill sticking and the like caused by a narrow density window. The bottom hole constant pressure well drilling is a main mode of land pressure control well drilling, mainly solves the problem of narrow window well drilling, but cannot solve the problem of leakage of large karst cave and large crack stratum, and is characterized in that ground throttling and back pressure are needed.
The prior published patent names are 'a drilling device and a method for realizing bottom hole pressure control by utilizing flow monitoring', and the Chinese patent publication number is CN103510893B, wherein the patent passes through a slurry pump inlet flow measuring system, a back pressure pump inlet flow measuring system, a drilling fluid back flow measuring system, an automatic throttle manifold system, a rotary control head, a liquid-gas separator and a vibrating screen, wherein an inlet of the slurry pump inlet flow measuring system is connected with a slurry tank by a pipeline, an outlet of the slurry pump inlet flow measuring system is connected with a drill rod by a pipeline, and the bottom of the drill rod is communicated with an inlet pipeline of the automatic throttle manifold system and an outlet pipeline of the back pressure pump inlet flow measuring system from a well annulus to the rotary control head by the drill bit; the return pressure pump inlet flow measurement system is connected to the mud tank through a pipeline; the outlet of the automatic throttling manifold system is provided with a pipeline which is connected with the inlet of the drilling fluid return flow measuring system; the outlet of the drilling fluid return flow measuring system is connected with the inlet of the liquid-gas separator through a pipeline; the liquid-gas separator is provided with two branches, so that the adverse effect of well bottom leakage or overflow on well drilling can be effectively controlled or eliminated.
However, in the drilling system adopted in the above patent, there is no treatment against pollution of the drilling fluid, and during the drilling process, the drilling fluid is a circulating flushing medium used in the well bore, but various pollutants from the stratum often enter the drilling fluid, for example, hydrogen sulfide, gypsum, carbon dioxide, brine and the like, so that the performance of the drilling fluid is changed, which is often called as the drilling fluid is invaded. Some contaminants seriously affect the rheology and fluid loss properties of the drilling fluid and some exacerbate damage and corrosion to the drilling tool. The light weight affects the stability of the well wall and the protection of the oil and gas reservoir, and the heavy weight affects the underground safety. When the pollution is serious, the normal operation of the drilling engineering can be ensured only by effectively adjusting the formula in time or adopting a chemical and mechanical method to remove the formula, but most of the drilling fluid is difficult to discover and treat in time after being polluted in the recycling process.
Disclosure of Invention
The utility model aims to provide a novel pressure control drilling system, which solves the problems that various pollutants from stratum enter drilling fluid to influence the rheological property and the filtration performance of the drilling fluid, the drilling fluid is always in recycling use, and the drilling fluid is difficult to find and treat in time after being polluted.
The embodiment of the utility model is realized by the following technical scheme: the novel pressure-controlled drilling system comprises a drilling rod, a slurry pump inlet flow measurement system, a back pressure pump inlet flow measurement system, a drilling fluid return flow measurement system, an automatic throttle manifold system and a rotary control head, wherein an inlet of the slurry pump inlet flow measurement system is connected with a slurry tank through a pipeline, an outlet of the slurry pump inlet flow measurement system is communicated with the drilling rod through a pipeline, a drill bit passes through the bottom of the drilling rod and is communicated with a rotary control head from a well hole annulus to the rotary control head through the bottom of the drilling rod, the rotary control head is communicated with an inlet of the automatic throttle manifold system and an outlet of the back pressure pump inlet flow measurement system through a pipeline, the back pressure pump inlet flow measurement system is connected to the slurry tank through a pipeline, an outlet of the automatic throttle manifold system is communicated with an inlet of the drilling fluid return flow measurement system through a pipeline, the liquid is provided with two output branch pipelines, one branch pipeline is communicated with the slurry tank, and the other branch pipeline is communicated with a combustion port;
the drilling fluid treatment system is arranged on a branch pipeline which is communicated with the mud tank;
the drilling fluid treatment system includes: the liquid-gas separator comprises a main buffer tank, a purifying component, an auxiliary buffer tank and a first solid-liquid separation part, wherein one branch line of the liquid-gas separator is communicated with an inlet of the main buffer tank;
the main buffer tank is provided with two output pipelines, one output pipeline of the main buffer tank is communicated with the inlet of the first solid-liquid separation part, and the other output pipeline of the main buffer tank is communicated with the inlet of the purification assembly;
the outlet of the purification component is communicated with the auxiliary buffer pool through a pipeline;
the auxiliary buffer tank is provided with two outlets, one outlet of the auxiliary buffer tank is communicated with the inlet of the mud tank through a pipeline, and the other outlet of the auxiliary buffer tank is communicated with the purification assembly through a pipeline;
the first solid-liquid separation piece is provided with a liquid outlet and a solid outlet, and the liquid outlet is communicated with the mud tank through a pipeline.
Further, the purification assembly comprises a destabilizing box, a flocculation box, a fuel removing box and a second solid-liquid separation piece, wherein the destabilizing box, the flocculation box, the fuel removing box and the second solid-liquid separation piece are sequentially communicated through pipelines; the inlet of the destabilizing box is communicated with the main buffer tank through a pipeline, and the liquid separated by the second solid-liquid separation piece is conveyed to the auxiliary buffer tank through the pipeline;
the pipeline between the main buffer pool and the destabilizing box is provided with a first slurry pump, the pipelines among the destabilizing box, the flocculation box and the oil removing box are all provided with pneumatic flat gate valves, and the pipeline of the oil removing box, which is communicated with the second solid-liquid separation piece, is provided with a second slurry pump.
Further, the destabilizing tank, the flocculation tank and the oil removing tank have the same structure; the destabilizing box, the flocculation box and the oil removing box are distributed in a step shape from top to bottom; and a stirring roller is rotatably arranged in the box body of the destabilizing box.
Further, the first solid-liquid separation piece is a vibrating screen, and the second solid-liquid separation piece is a filter press.
Further, a third slurry pump is arranged on a pipeline which is communicated with the purifying component and the auxiliary buffer pool, the output end of the third slurry pump is communicated with three sub-pipelines through a joint, and the three sub-pipelines are respectively communicated with the destabilizing tank, the flocculation tank and the oil removing tank;
and pneumatic flat gate valves are arranged on the three sub-pipelines.
Further, a downhole annulus pressure measuring tool is arranged at the bottom of the drill rod from the annulus of the well bore to the rotary control head through the drill bit.
Further, the downhole annular pressure measuring tool comprises a formation pressure while drilling tester and a plurality of pressure sensors, wherein the formation pressure while drilling tester is arranged at the position of the drill rod, which is close to the drill bit, and the pressure sensors are arranged on the drill rod at intervals.
The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:
by adding the drilling fluid purifying treatment system on the basis of the fine pressure control drilling system, whether the returned drilling fluid is polluted or not is judged timely, whether the drilling fluid is purified or not is selected again, corresponding decontamination operation is carried out according to the actual pollution condition of the drilling fluid, the cleaning assembly is returned after primary purification is finished, the cleaning assembly is failed in the re-inspection process again, the cleaning assembly is not qualified until the use standard of the drilling fluid is recovered or the emission standard is met, the defects in the fine pressure control drilling system are perfected, the use condition is met, and the normal operation of drilling engineering is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a hierarchical structure of a novel pressure-controlled drilling system according to the present utility model;
FIG. 2 is a schematic diagram of a hierarchical structure of a drilling fluid treatment system in a novel pressure-controlled drilling system according to the present utility model;
icon: 1001. the system comprises a slurry pump inlet flow measurement system 1002, a back pressure pump inlet flow measurement system 1003, a drilling fluid return flow measurement system 1004, an automatic throttle manifold system 1005, a drilling fluid treatment system 2, a drill rod, 3, a rotary control head 4, a slurry tank 5, a liquid-gas separator 6, a combustion port 7, a main buffer tank 8, a purification assembly 81, a destabilizing tank 82, a flocculation tank 83, an oil removal tank 84, a second solid-liquid separation element 9, a secondary buffer tank 10, a first solid-liquid separation element 11, a first slurry pump 12, a pneumatic flat gate valve 13, a second slurry pump 14, a third slurry pump 15, a formation pressure while drilling tester 16 and a pressure sensor.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 2, the present embodiment provides a novel pressure-controlled drilling system, which comprises a drill pipe 2, a slurry pump inlet flow measurement system 1001, a back pressure pump inlet flow measurement system 1002, a drilling fluid return flow measurement system 1003, an automatic throttle manifold system 1004 and a rotary control head 3, wherein an inlet of the slurry pump inlet flow measurement system 1001 is connected with a slurry tank 4 through a pipeline, an outlet of the slurry pump inlet flow measurement system 1001 is communicated with the drill pipe 2 through a pipeline, a drill bit passes through the bottom of the drill pipe 2 from a well bore annulus to the rotary control head 3, the rotary control head 3 is communicated with an inlet of the automatic throttle manifold system 1004 and an outlet of the back pressure pump inlet flow measurement system 1002 through a pipeline, the back pressure pump inlet flow measurement system 1002 is connected with the slurry tank 4 through a pipeline, an outlet of the automatic throttle manifold system 1004 is communicated with an inlet of the drilling fluid return flow measurement system 1003 through a pipeline, the liquid separator 5 is provided with two output branch pipelines, one branch pipeline is communicated with the slurry tank 4, and the other branch pipeline is communicated with a combustion port 6; the specific implementation method comprises the following steps:
1) Acquiring the difference delta Q between the inlet flow and the outlet flow of the drilling equipment; and then judging the state of the drilling equipment according to the difference of the flow rates, wherein the state comprises the following steps: a leakage state, an overflow state and a non-leakage and non-overflow state; finally, the wellhead back pressure is regulated according to the state, and bottom hole pressure control is realized.
2) Acquiring a difference delta Q between an inlet flow of the mud pump inlet flow measurement system 1001 and an outlet flow of the drilling fluid return flow measurement system 1003; then judging the state of the drilling equipment according to the difference of the flow rates, wherein the state comprises a leakage state, an overflow state and a non-leakage and non-overflow state; and regulating wellhead back pressure according to the state to realize bottom hole pressure control.
3) Acquiring the difference delta Q between the inlet flow of the back pressure pump inlet flow measurement system 1002 and the outlet flow of the drilling fluid return flow measurement system 1003; then judging the state of the drilling equipment according to the difference of the flow rates, wherein the state comprises a leakage state, an overflow state and a non-leakage and non-overflow state; and regulating wellhead back pressure according to the state to realize bottom hole pressure control.
4) Obtaining the difference delta Q between the sum of the inlet flow of the mud pump inlet flow measurement system 1001 and the inlet flow of the back pressure pump inlet flow measurement system 1002 and the outlet flow of the drilling fluid out of the flow measurement system 1003; then judging the state of the drilling equipment according to the difference of the flow rates, wherein the state comprises a leakage state, an overflow state and a non-leakage and non-overflow state; finally, the wellhead back pressure is regulated according to the state, and bottom hole pressure control is realized.
As shown in fig. 1, the pressure-controlled drilling system comprises a drilling fluid treatment system 1005, wherein the drilling fluid treatment system 1005 is arranged on a branch pipe line of the liquid-gas separator 5 communicated with the mud tank 4 and is used for treating the drilling fluid flowing back from the mud tank 4;
as shown in fig. 2, the drilling fluid treatment system 1005 includes: the device comprises a main buffer tank 7, a purifying component 8, an auxiliary buffer tank 9 and a first solid-liquid separation part 10, wherein a branch line of the liquid-gas separator 5 is communicated with an inlet of the main buffer tank 7;
in specific implementation, the main buffer tank 7 is used for temporarily buffering the drilling fluid flowing back from the liquid-gas separator 5, and meanwhile, a sampling port is formed in the main buffer tank 7 and used for periodically collecting drilling fluid samples in the main buffer tank 7, and whether the drilling fluid in the main buffer tank 7 is polluted or not is judged through system collection so as to judge whether the drilling fluid needs to be processed in the next step or not.
More specifically, the main buffer tank 7 is provided with two output pipelines, an output pipeline of the main buffer tank 7 is communicated with the inlet of the first solid-liquid separation member 10, when the drilling fluid in the main buffer tank 7 is detected to be not polluted or meets the discharge standard, the drilling fluid in the main buffer tank 7 is pumped into the first fixed liquid separation member 10 for solid-liquid separation, sediment and debris carried in the drilling fluid are separated, and the separated fluid is pumped into the mud tank 4 for subsequent recycling.
As shown in fig. 2, another output pipeline of the main buffer pool 7 is communicated with an inlet of the purifying component 8, when the drilling fluid in the main buffer pool 7 is detected to be polluted, the drilling fluid is pumped into the purifying component 8 so as to be convenient for purifying the polluted drilling fluid, and the subsequent use, the discharge and the like are not influenced; meanwhile, the outlet of the purifying component 8 is communicated with the auxiliary buffer tank 9 through a pipeline, and after purified drilling fluid is discharged into the auxiliary buffer tank 9, whether the drilling fluid is qualified or not needs to be detected again.
More specifically, the auxiliary buffer tank 9 is provided with two outlets, one outlet of the auxiliary buffer tank 9 is communicated with the inlet of the mud tank 4 through a pipeline, when the detection is qualified again, drilling fluid is discharged into the mud tank 4, the other outlet of the auxiliary buffer tank 9 is communicated with the purification assembly 8 through a pipeline, and if the detection is unqualified again, the drilling fluid in the auxiliary buffer tank 9 needs to be pumped back to the purification assembly 8 to be purified again.
As shown in fig. 2, the first solid-liquid separation member 10 is provided with a liquid discharge port and a solid discharge port, the first solid-liquid separation member 10 is a vibrating screen, the liquid discharge port is communicated with the mud tank 4 through a pipeline, so that drilling fluid can be conveniently recycled, and solid waste separated by the first solid-liquid separation member 10 is transported and treated through a conveyer belt and a truck.
As shown in fig. 2, the purifying module 8 includes a destabilizing tank 81, a flocculating tank 82, an oil removing tank 83 and a second solid-liquid separation member 84, and the destabilizing tank 81, the flocculating tank 82, the oil removing tank 83 and the second solid-liquid separation member 84 are sequentially communicated through pipelines; the inlet of the destabilizing box 81 is communicated with the main buffer tank 7 through a pipeline, and the liquid separated by the second solid-liquid separation piece 84 is conveyed to the auxiliary buffer tank 9 through a pipeline;
a first slurry pump 11 is arranged on a pipeline between the main buffer tank 7 and the destabilizing tank 81, pneumatic flat gate valves 12 are arranged on pipelines among the destabilizing tank 81, the flocculation tank 82 and the oil removal tank 83, and a second slurry pump 13 is arranged on a pipeline of the oil removal tank 83, which is communicated with the second solid-liquid separation piece 84.
When the drilling fluid in the main buffer tank 7 is detected to be polluted or does not meet the emission standard, the drilling fluid in the main buffer tank 7 is pumped into the destabilizing box 81, a proper destabilizing mode is judged to be used according to a pollution source, and destabilization and condensation can be classified into 4 types of compression double layers, electric neutralization, adsorption bridging and net winding according to a mechanism.
The compressed electric double layer (Electronic Double-layer Compression) is a process in which an active electrolyte capable of generating a high-valence counter ion is added to a colloidal dispersion, and the strength of the counter ion in the solution is increased to reduce the thickness of the diffusion layer, thereby lowering the zeta potential. The essence of the process is that the electrostatic repulsive force between the newly added counter ions and the original counter ions in the diffusion layer presses the original counter ions into the adsorption layer to different degrees, so that the diffusion layer is thinned.
When the electrolyte is ferric salt or aluminum salt, the electrolyte can be dissociated and hydrolyzed under certain conditions to generate various complex ions, such as [ Al (H2O) 6], [ Al (OH) (H2O) 5], [ Al2 (OH) 2 (H2O) 8], and [ Al3 (OH) 5 (H2O) 9 ]. These complex ions not only can compress the double electric layer, but also can enter the solid-liquid interface through the counter ion layer at the periphery of the colloidal core, and neutralize the electric charge of the potential ions, so that the electric potential of psi is reduced, the zeta potential is also reduced, and destabilization and coagulation of colloidal particles are achieved, namely electric neutralization (Charge Neutralization).
If the drug is water-soluble chain polymer and has active sites capable of adsorbing colloidal particles and fine suspended substances, the drug can bridge the particles into individual floccules (commonly called alum blossom) through electrostatic attraction, van der Waals attraction, hydrogen bonding force and the like. This effect is known as adsorption bridging (Adsorption Bridging). The chain molecules of the polymer act as bridges and ligaments therein.
The net winding is also called net catch (Sweep Flocculation). When high valence metal salts such as iron and aluminum salts are used as the coagulant and the amount and medium conditions are sufficient to allow them to rapidly form insoluble hydroxides, the precipitation allows colloidal particles or fine suspensions to be removed as nuclei or adsorbates.
After the destabilization tank 81 is completed, the destabilized drilling fluid is fed into a flocculation tank 82 for flocculation, typically by adding a suitable flocculant that acts to adsorb particulates, "bridging" between the particulates and thereby promoting agglomeration. Flocculation is the first stage of latex coagulation in the latex industry. Flocculants are typically electrolytes such as ammonium salts or adsorptive gum chemicals.
Further, after flocculation, the oil is discharged into an oil removal tank 83, and the oil stain in the drilling fluid is removed by a chemical or other method. Adding an emulsifier and acid into the drilling fluid of the oil-containing drill cuttings, and gradually separating hydrocarbon substances from the drill cuttings after a period of low-shear stirring to form small liquid drops; the emulsifier is hydrophilic, can disperse liquid drops, and achieves the effect of oil-in-water; adding active silicate, regulating pH value, stirring under low shear, allowing silicate and hydrogen ion to react to obtain silicic acid, separating out silicic acid from solution, adhering onto emulsified oil drop under stirring, encapsulating oil drop to form microcapsule with density higher than that of solution, and depositing at bottom of solution to remove oil.
After oil removal is finished, the treated drilling fluid is conveyed into the second solid-liquid separation piece 84 through the second slurry pump 13 for solid-liquid separation, the second solid-liquid separation piece 84 adopts a filter press, so that solid waste of filter pressing can be cleaned, meanwhile, the filter pressing effect is good, liquid after filter pressing is conveyed into the auxiliary buffer pool 9, and the solid waste of filter pressing is transported and treated through a conveying belt and a truck.
More specifically, the destabilizing tank 81, the flocculation tank 82 and the oil removal tank 83 have the same structure; the destabilizing box 81, the flocculation box 82 and the oil removing box 83 are distributed in a step shape from top to bottom, and under the action of gravity, the corresponding pneumatic flat gate valve 12 is only required to be opened for discharging between adjacent box bodies; meanwhile, a stirring roller is rotatably provided in the case body of the destabilizing case 81 for accelerating the corresponding purifying operation and preventing deposition.
As shown in fig. 2, a third slurry pump 14 is arranged on a pipeline of the auxiliary buffer pool 9 communicated with the purification assembly 8, the output end of the third slurry pump 14 is communicated with three sub-pipelines through a joint, and the three sub-pipelines are respectively communicated with a destabilizing tank 81, a flocculation tank 82 and an oil removal tank 83;
the three sub-pipelines are all provided with pneumatic flat gate valves 12, and drilling fluid is conveyed into corresponding boxes by opening corresponding valves. In the specific implementation, when the drilling fluid in the auxiliary buffer pool 9 is detected not to be cleaned or does not meet the standard of emission and recycling, the drilling fluid is discharged into the corresponding purifying tank according to pollutants, the destabilizing fluid is not thoroughly discharged into the destabilizing tank 81, the flocculating fluid is not sufficiently discharged into the flocculating tank 82, the oil is not completely removed into the oil removing tank 83, and if only the flocculating fluid is not sufficiently flocculated and the oil is contained, the drilling fluid is only discharged into the flocculating tank 82.
As shown in fig. 1, a downhole annulus pressure measurement tool is installed at the bottom of the drill pipe 2 from the borehole annulus to the rotary control head 3 by the drill bit.
The downhole annular pressure measuring tool comprises a formation pressure while drilling tester 15 and a plurality of pressure sensors 16, wherein the formation pressure while drilling tester 15 is arranged at a position of the drill rod 2 close to a drill bit, and the pressure sensors 16 are arranged on the drill rod 2 at intervals. In particular, formation pressure while drilling tester 15 is primarily implemented using a PWD system that provides accurate, real-time annular pressure data for pressure-controlled drilling. Meanwhile, a plurality of pressure sensors 16 are arranged on the rotating rod at intervals, and form a line graph for judging the pressure condition of each depth of the well wall, and the line graph is used for judging whether the well wall at each depth is stable or not, so that whether leakage or well kick exists in each well wall is conveniently judged.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. The utility model provides a novel accuse pressure drilling system, includes drilling rod (2), slush pump entry flow measurement system (1001), back pressure pump entry flow measurement system (1002), drilling fluid returns out flow measurement system (1003), automatic throttle manifold system (1004) and rotatory control head (3), the import of slush pump entry flow measurement system (1001) is connected with mud jar (4) through the pipeline, the export of slush pump entry flow measurement system (1001) is through pipeline and drilling rod (2) intercommunication, via drilling rod (2) bottom is by drill bit from well annular space to rotatory control head (3), rotatory control head (3) are through pipeline and the entry of automatic throttle manifold system (1004) and the export of back pressure pump entry flow measurement system (1002), back pressure pump entry flow measurement system (1002) have the pipeline to be connected to mud jar (4), the export of automatic throttle manifold system (1004) is through pipeline and the entry of drilling fluid returns out flow measurement system (1003), the export of slush pump entry flow measurement system (1003) is through pipeline and is connected with the entry of liquid separator (5), two gas separator (5) have the branching pipe (5) to be equipped with the combustion line, two gas separator (6) are connected with each other in the branching pipe, the gas separator has the branching pipe (6) is connected;
the method is characterized in that: the drilling fluid treatment system (1005) is arranged on a branch pipeline, which is communicated with the mud tank (4), of the liquid-gas separator (5);
the drilling fluid treatment system (1005) includes: the device comprises a main buffer tank (7), a purifying component (8), an auxiliary buffer tank (9) and a first solid-liquid separation part (10), wherein one branch line of the liquid-gas separator (5) is communicated with an inlet of the main buffer tank (7);
the main buffer tank (7) is provided with two output pipelines, one output pipeline of the main buffer tank (7) is communicated with the inlet of the first solid-liquid separation piece (10), and the other output pipeline of the main buffer tank (7) is communicated with the inlet of the purification component (8);
the outlet of the purifying component (8) is communicated with the auxiliary buffer pool (9) through a pipeline;
the auxiliary buffer tank (9) is provided with two outlets, one outlet of the auxiliary buffer tank (9) is communicated with the inlet of the mud tank (4) through a pipeline, and the other outlet of the auxiliary buffer tank (9) is communicated with the purification assembly (8) through a pipeline;
the first solid-liquid separation member (10) is provided with a liquid discharge port and a solid discharge port, and the liquid discharge port is communicated with the mud tank (4) through a pipeline.
2. The novel pressure-controlled drilling system according to claim 1, wherein the purification assembly (8) comprises a destabilizing tank (81), a flocculation tank (82), an oil removal tank (83) and a second solid-liquid separation member (84), and the destabilizing tank (81), the flocculation tank (82), the oil removal tank (83) and the second solid-liquid separation member (84) are sequentially communicated through pipelines; an inlet of the destabilizing box (81) is communicated with the main buffer tank (7) through a pipeline, and liquid separated by the second solid-liquid separation piece (84) is conveyed to the auxiliary buffer tank (9) through a pipeline;
be provided with first slush pump (11) on the pipeline between main buffer pool (7) with destabilise case (81), all be provided with pneumatic flat gate valve (12) on the pipeline between destabilise case (81), flocculation case (82) and deoiling case (83), deoiling case (83) with be provided with second slush pump (13) on the pipeline of second solid-liquid separation spare (84) intercommunication.
3. A novel pressure control drilling system according to claim 2, characterized in that the destabilizing tank (81), flocculation tank (82) and oil removal tank (83) are of the same structure; the destabilizing box (81), the flocculation box (82) and the oil removing box (83) are distributed in a step shape from top to bottom; and a stirring roller is rotatably arranged in the box body of the destabilizing box (81).
4. The novel pressure-controlled drilling system of claim 2, wherein the first solid-liquid separator (10) is a vibrating screen and the second solid-liquid separator (84) is a filter press.
5. The novel pressure control drilling system according to claim 2, wherein a third slurry pump (14) is arranged on a pipeline which is communicated with the purifying component (8) by the auxiliary buffer pool (9), the output end of the third slurry pump (14) is communicated with three sub-pipelines through a joint, and the three sub-pipelines are respectively communicated with the destabilizing tank (81), the flocculation tank (82) and the oil removing tank (83);
and pneumatic flat gate valves (12) are arranged on the three sub-pipelines.
6. A novel pressure controlled drilling system according to claim 1, characterized in that the drill rod (2) is equipped with a downhole annulus pressure measuring tool from the borehole annulus to the rotary control head (3) at the bottom.
7. The novel pressure control drilling system according to claim 6, wherein the downhole annulus pressure measuring tool comprises a formation pressure while drilling tester (15) and a plurality of pressure sensors (16), the formation pressure while drilling tester (15) is arranged at a position of the drill rod (2) close to a drill bit, and the pressure sensors (16) are arranged on the drill rod (2) at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320939407.5U CN219691505U (en) | 2023-04-23 | 2023-04-23 | Novel pressure-control drilling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320939407.5U CN219691505U (en) | 2023-04-23 | 2023-04-23 | Novel pressure-control drilling system |
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| CN219691505U true CN219691505U (en) | 2023-09-15 |
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| CN202320939407.5U Active CN219691505U (en) | 2023-04-23 | 2023-04-23 | Novel pressure-control drilling system |
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| Country | Link |
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| CN (1) | CN219691505U (en) |
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