CN104153730A - Drilling tool for clearing borehole - Google Patents
Drilling tool for clearing borehole Download PDFInfo
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- CN104153730A CN104153730A CN201410353821.3A CN201410353821A CN104153730A CN 104153730 A CN104153730 A CN 104153730A CN 201410353821 A CN201410353821 A CN 201410353821A CN 104153730 A CN104153730 A CN 104153730A
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Abstract
The invention discloses a drilling tool for clearing a borehole. The drilling tool comprises a body. The body is internally provided with a center passage. An upper connector is arranged at the upper end of the body; a lower connector is disposed at the lower end of the body. Annular passages and protrusions are evenly distributed on the periphery of the body at intervals. A self-oscillation structural unit is arranged in each protrusion in a recessed manner and is provided with a self-oscillation cavity. A fluid pressure area between each self-oscillation cavity and the wall of a well includes an entry radiation low-pressure area, a vortex ring negative-pressure area, a boundary negative-pressure area and an exit collision high-pressure area. An injection unit is further disposed on each protrusion. The drilling tool is mounted on a drill string, turbulence level and pulsation effect of annular fluid are enhanced, the annular fluid scours, disturbs and entrains a cuttings bed of the wall of the well and an irregular wall of the well, the cuttings bed can be cleared more efficiently, the wall of the well can be dressed more efficiently, and the problems that the presence of the cuttings bed causes excessive frictional torque and sand jamming of a drill tool and irregularity of the borehole and the presence of a neck cause resistance and jamming to the drill string can be effectively eliminated.
Description
Technical field
The present invention relates to the corollary equipment technical field of oil, gas drilling, relate in particular in a kind of complex structural well drilling process for cleaning the drilling tool of well.
Background technology
Increase along with oil-gas mining difficulty, China has strengthened the exploitation to the complicated oil reservoirs such as deep layer, oil sheet, fault block oil reservoir and marine oil and gas resource, and the complex structural well technology such as directional well, horizontal well and extended reach well have become the effective means of this type of petroleum resources of exploitation.In the drilling process of complex structural well, be subject to the impact of the factors such as hole angle, chips size and annular space hydraulic parameters easily to form cutting bed, the existence of cutting bed causes producing excessive frictional resistance moment of torsion in drilling process, even causes husky card drilling tool accident, has a strong impact on the safety of creeping into.Meanwhile, in the drilling process of the poor and easy necking down of borehole wall stability stratum, drill string is easily subject to well wall dropping block, the borehole wall is irregularly shaped and the impact of necking down produces to put and puts the phenomenon that frictional resistance is larger, when serious, can produce bit freezing.
For above two kinds of engineering problems, research shows: bore hole annulus hydraulic parameters is to realize Cutting Disposal and eliminate the key factor that drill string is subject to larger frictional resistance and bit freezing phenomenon.
At present, for a person skilled in the art, in the urgent need to a kind of drilling tool for clean well of sample development, to improve pressure distribution and the VELOCITY DISTRIBUTION of annular space drilling fluid, destroy cutting bed and eliminate to a certain extent bit freezing phenomenon.
Summary of the invention
Technical problem to be solved by this invention is: the drilling tool that a kind of clean well is provided, this instrument can make annular space drilling fluid produce self-oscillation and high-speed jet, for removing the cutting bed that complex structural well drilling process produces, improve well clean conditions, improve the safety of creeping into.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of drilling tool of clean well, comprise body, described body interior is provided with the center flow channels of the perforation of extending along its axis direction, the upper end of described body is provided with for connecting the top connection of upper drilling string, and the lower end of described body is provided with for connecting the lower contact of lower drilling string; In the periphery of described body, there is uniformly at intervals annular space runner, the bearing of trend of described annular space runner is consistent with the axis direction of described body, between adjacent described annular space runner, it is lug boss, described lug boss and described annular space runner interval arrange, on described lug boss, depression is provided with self-oscillation element of construction, described self-oscillation element of construction is provided with the self-excited oscillation cavity, along the axis direction of described body, the fluid pressure between described the self-excited oscillation cavity and the borehole wall is divided into entrance radiation low-pressure area, collar vortex negative pressuren zone, negative pressuren zone, border and outlet collision higher-pressure region.
Preferably, described self-oscillation element of construction comprises the first inclined-plane connecting successively, bottom surface, second inclined-plane parallel with described body axis from bottom to top, and two sides; Angle between described the first inclined-plane and described bottom surface is obtuse angle, and the angle between described the second inclined-plane and described bottom surface is acute angle.
Further preferably, the base on described the first inclined-plane is also connected with the first plane, and the base on described the second inclined-plane is also connected with the second plane.The setting that the first inclined-plane in self-oscillation element of construction, bottom surface, the second inclined-plane, two sides, the first plane, second plane etc. are a plurality of, improved and stopped that fluid bumps fluid and changes the chance of the flow direction, contribute to collar vortex negative pressuren zone to form vortex, improve destruction to cutting bed, entrainmented ability, improved the cleaning efficiency to landwaste.
Preferably another kind of, described in each, on lug boss, be also provided with at least one injection unit, described injection unit is provided with injection runner, for the cleaner for high-pressure drilling fluid in described body center flow channels is injected into the borehole wall.
Further preferably, described injection unit comprises the ladder hole being arranged on described lug boss, the axis direction of described ladder hole is along the radially setting of described body, the large nose end of described ladder hole is near the outside of described body, the large nose end of described ladder hole is provided with nozzle, described nozzle has the nozzle flow channel of hollow, and described nozzle flow channel is along the radially setting of described body.
Preferably, have uniformly at intervals at least two described annular space runners in the periphery of described body, described lug boss is at least evenly equipped with two.Best, described annular space runner is evenly equipped with three, and described lug boss is evenly equipped with three.
Preferably, described in each, lug boss is provided with a described self-oscillation element of construction.
Preferably, described in each, lug boss is provided with some described self-oscillation element of construction.Some described self-oscillation element of construction are divided into multiple row, and every row are provided with self-oscillation element of construction described at least one; The described self-oscillation element of construction of same row is coaxially set, and the described self-oscillation element of construction positions of adjacent two row are corresponding or be crisscross arranged.
Preferably, described body, described top connection, described lower contact are integral type structure.Adopt this structure, whole instrument of the present invention does not have movable part, simple in structure, esy to use, safe and reliable.
Owing to having adopted technique scheme, drilling tool for clean well of the present invention, in body interior, be provided with the center flow channels of perforation, the upper end of body is provided with top connection, the lower end of body is provided with lower contact, in the periphery of body, have uniformly at intervals annular space runner and with the spaced lug boss of annular space runner, on lug boss, depression is provided with self-oscillation element of construction, self-oscillation element of construction is provided with the self-excited oscillation cavity, axis direction along tool body, fluid pressure between the self-excited oscillation cavity and the borehole wall is divided into entrance radiation low-pressure area, collar vortex negative pressuren zone, negative pressuren zone, border and outlet collision higher-pressure region, instrument of the present invention is arranged on to easy formation cutting bed, hole instability easily to be formed in the horizontal segment or the large corresponding drill string of displaced segments that falls piece and irregularly shaped and easy necking down, in drilling process, drilling fluid fluid in annular space enters the self-excited oscillation cavity continuously, flow through after entrance radiation low-pressure area, collar vortex negative pressuren zone produces periodic damping to the fluid of next-door neighbour's borehole wall, form hydraulic pulse, increased the turbulence level of the self-excited oscillation cavity region, contribute to disturbance cutting bed, simultaneously, under the double action of the differential pressure action of borehole wall higher-pressure region and collar vortex negative pressuren zone and the souring of entrance radiation low-pressure area high-speed and continuous drilling fluid, cutting bed on the borehole wall is destroyed and landwaste is entrainmented to collar vortex negative pressuren zone, then under the effect of annular space disturbance and drill string rotating, this part landwaste is brought in annular space runner and is circulated to ground solid control equipment and carries out Separation of Solid and Liquid with returning on annular space drilling fluid, thereby realized the removing of cutting bed and the cleaning of landwaste, improved well clean conditions.
Owing to being also further provided with injection unit on the lug boss of tool body, injection unit is provided with for the cleaner for high-pressure drilling fluid in body center flow channels being injected into the injection runner of the borehole wall; In drilling process, the high-pressure fluid in drill string washes away the borehole wall at a high speed from spraying runner ejection, has improved the shape of well, makes well more regular, has further improved efficiency and the safety of creeping into.
Use after instrument of the present invention, while flowing through between the self-excited oscillation cavity of this instrument and the borehole wall due to annular space drilling fluid, through self-oscillation process such as resonance, feedback, frequency-selecting and amplifications, in chamber, form " low pressure-high pressure " alternate area, going out interruption-forming pulsing jet; Meanwhile, in the corresponding annular space of injection unit region, form high-pressure injection district, improved Flow Field Distribution and the turbulence level of instrument place annular space, destroyed cutting bed and realized the finishing to the borehole wall.
Accompanying drawing explanation
Fig. 1 is the structure cross-sectional schematic of the embodiment of the present invention one;
Fig. 2 is the B-B cross-sectional schematic in Fig. 1;
Fig. 3 is the C-C cross-sectional schematic in Fig. 1;
Fig. 4 be self-oscillation element of construction in Fig. 1 structural representation and and the borehole wall between position view;
Fig. 5 is the self-excited oscillation cavity in Fig. 1 and the fluid pressure subregion schematic diagram between the borehole wall;
Fig. 6 is the injection unit structural representation in Fig. 1;
Fig. 7 is the self-oscillation element of construction distribution schematic diagram in the embodiment of the present invention two;
Fig. 8 is the self-oscillation element of construction distribution schematic diagram in the embodiment of the present invention three;
In figure: 1-top connection; 2-center flow channels; 3-body; 4-annular space runner; 5-self-oscillation element of construction; 51-the first inclined-plane; 52-bottom surface; 53-the second inclined-plane; 54-the second plane; 55-the first plane; 56-side; 6-lower contact; 7-the self-excited oscillation cavity; 71-entrance; 72-outlet; The 8-borehole wall; 9-injection unit; 91-ladder hole; 92-jump-ring slot; 93-nozzle; 94-jump ring; 95-nozzle flow channel; A-entrance radiation low-pressure area; B-collar vortex negative pressuren zone; Negative pressuren zone, C-border; D-outlet collision higher-pressure region.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Embodiment mono-
As shown in Figure 1, be the drilling tool structure cross-sectional schematic of the clean well of the embodiment of the present invention one, for convenience of explanation, this figure only provides the structure division relevant with the present invention.The drilling tool of the clean well of the present embodiment comprises body 3, is provided with the center flow channels 2 of the perforation of extending along its axis direction in body 3 inside, and center flow channels 2 is runners of drill string inner high voltage drilling fluid while creeping into; The upper end of body 3 is for connecting the top connection 1 of upper drilling string, the lower end of body 3 is for connecting the lower contact 6 of lower drilling string, body 3 in the present embodiment, top connection 1 are integral type structure with lower contact 6, adopt this structure, whole instrument of the present invention does not have movable part, simple in structure, esy to use, safe and reliable; In the periphery of body 3, there is uniformly at intervals annular space runner 4, the bearing of trend of annular space runner 4 is consistent with the axis direction of body 3, annular space runner 4 is main flow channels of annular space low-pressure drilling liquid, pressure consumption when contributing to reduce annular space drilling fluid and flowing through tool exterior surface and borehole wall gap, also contributes to carrying of landwaste simultaneously; Between adjacent annular space runner 4, it is lug boss, lug boss and annular space runner 4 intervals arrange, on lug boss, depression is provided with self-oscillation element of construction 5, as shown in Figure 4 and Figure 5, self-oscillation element of construction 5 is provided with the self-excited oscillation cavity 7, along the axis direction of body 3, the fluid pressure between the self-excited oscillation cavity 7 and the borehole wall 8 is divided into entrance radiation low-pressure area A, collar vortex negative pressuren zone B, negative pressuren zone, border C and outlet collision higher-pressure region D.
As shown in Figure 3 and Figure 4, in the present embodiment, self-oscillation element of construction 5 comprises the first inclined-plane 51 connecting successively, bottom surface 52, second inclined-plane 53 parallel with body 3 axis from bottom to top, and two sides 56; Wherein, the angle α between the first 51Yu bottom surface, inclined-plane 52 is obtuse angle, and the angle β between the second 53Yu bottom surface, inclined-plane 52 is acute angle.Further optimal design, the base that is also connected with the first plane 55, the second inclined-planes 53 on the base on the first inclined-plane 51 is also connected with the second plane 54.A plurality of, the first inclined-plane 51 in self-oscillation element of construction 5, bottom surface 52, the second inclined-plane 53, two sides 56, the first plane 55, second plane 54 etc. have surrounded the self-excited oscillation cavity 7 jointly, a plurality of arrange improved and stopped that fluid bumps fluid and changes the chance of the flow direction, contribute to collar vortex negative pressuren zone B to form vortex, improve the destruction of cutting bed is entrainmented to ability and the cleaning efficiency to landwaste.
As shown in Fig. 1 and Fig. 6, the drilling tool of clean well of the present invention, on each lug boss of tool body 3, be also provided with at least one injection unit 9, this injection unit 9 is provided with injection runner, and this injection runner is for being injected into the borehole wall 8 by the cleaner for high-pressure drilling fluid in body center flow channels 2.
Wherein, the structure of injection unit 9 is: comprise the ladder hole 91 being arranged on lug boss, the axis direction of ladder hole 91 is along the radially setting of body 3, the small bore end of ladder hole 91 is near the center flow channels 2 of body 3, the large nose end of ladder hole 91 is near the outside of body 3, large nose end at ladder hole 91 is provided with nozzle 93, nozzle 93 has the nozzle flow channel 95 of hollow, nozzle flow channel 95 is along the radially setting of body 3, outer end at ladder hole 91 large nose ends is provided with jump-ring slot 92, in jump-ring slot 92, be provided with jump ring 94, for spacing to nozzle 93.
Wherein, the structure of injection unit 9 can also adopt and on the lug boss of body 3, directly get out the interior structure (be large nose end near the center flow channels 2 of body 3, small bore end is near the outside of body 3) of little ladder hole outside large.The structure of this kind of injection unit is relatively simple.
In the structure of above two kinds of injection units 9, be preferably provided with the structure of nozzle 93, in prior art, the material of nozzle 93 is better than body 3, and changes, uses more convenient.
The drilling tool of clean well of the present invention has uniformly at intervals at least two annular space runners in the periphery of body 3, and lug boss is correspondingly at least evenly equipped with two.In embodiment mono-, as shown in Figures 2 and 3, annular space runner 4 is evenly equipped with three, and lug boss is evenly equipped with three, is 120 ° and is uniformly distributed.As shown in figures 1 and 3, in embodiment mono-, on each lug boss, be provided with a self-oscillation element of construction 5.
Embodiment bis-
As shown in Figure 7, embodiment bis-and embodiment mono-are basic identical, difference is, the drilling tool of the clean well of embodiment bis-, on each lug boss of body 3 peripheries, be provided with some self-oscillation element of construction 5, some self-oscillation element of construction 5 are divided into multiple row (there is shown three row), and every row are provided with at least one self-oscillation element of construction 5 (there is shown two); The self-oscillation element of construction 5 of same row is coaxially set, and self-oscillation element of construction 5 positions of adjacent two row are corresponding.
Embodiment tri-
As shown in Figure 8, embodiment tri-and embodiment bis-are basic identical, the drilling tool of the clean well of embodiment tri-, on each lug boss of body 3 peripheries, be provided with some self-oscillation element of construction 5, some self-oscillation element of construction 5 are divided into multiple row (there is shown three row), and every row are provided with at least one self-oscillation element of construction 5 (there is shown); Difference is, self-oscillation element of construction 5 positions of adjacent two row are crisscross arranged.
In embodiment bis-and embodiment tri-, by the layout of the various ways such as the some self-oscillation element of construction 5 that scatter on tool body lug boss are connected, interlocked, than embodiment mono-, strengthened instrument self-oscillation hydraulic pulse to the disturbance of cutting bed, destroy, entrainment and remove effect, can realize ring empty flow field disturbance to greatest extent, thus more effective destruction and Cutting Disposal.
In above-described embodiment, the drilling tool of clean well of the present invention, be located at body 3 peripheries annular space runner 4, lug boss, be located at self-oscillation element of construction 5 on lug boss and the quantity of injection unit 9 all can increase and decrease according to actual needs to some extent.
Operating principle: self-oscillation element of construction 5 is core cells of the drilling tool of clean well of the present invention, (in Fig. 5, arrow is depicted as the flow direction of drilling fluid) as shown in Figure 5, drilling fluid is when entrance 71 flows through between the self-excited oscillation cavity 7 and the borehole wall 8, produce the self-oscillation process such as resonance, feedback, frequency-selecting and amplification, in chamber, form four pressure subregions: entrance radiation low-pressure area A, pressure and size are periodically variable collar vortex negative pressuren zone B, negative pressuren zone, border C and outlet collision higher-pressure region D.The appearance of entrance radiation low-pressure area A is because the primary collar vortex in chamber center forms low-pressure area in jet upstream, causes fluid to flow through due to the rear flow velocity of entrance 71 sharply rises, and the acceleration of jet simultaneously has also promoted the formation of low pressure collar vortex; The appearance of outlet collision higher-pressure region D is that build-up of pressure rises suddenly, and is radiated chamber interior certain area because fluid is by after exporting 72; Fluid enters after top outlet collision higher-pressure region D, and flow velocity increases, and forms pulsing jet, and pressure declines gradually, and levels off to gradually annular pressure.
In addition, injection unit 9 is also the preferred important structure of the drilling tool of clean well of the present invention, as shown in Figure 6, drilling fluid from nozzle flow channel 95 at a high speed ejection act on the borehole wall 8, eliminated on the meticulous and irregular caused drill string of the well causing due to reasons such as mud cake is blocked up, well wall dropping block, necking downs and put and put the even bit freezing phenomenon that is hampered.Can, by regulating the distribution of nozzle arrangements and Type Control nozzle energy, when fully washing away, revising the borehole wall, not destroy borehole wall stability.
The course of work: the drilling tool of clean well of the present invention is arranged on to easy formation cutting bed, wall cake are blocked up, hole instability easily forms in the horizontal segment or the large corresponding drill string of displaced segments that falls piece and irregularly shaped and easy necking down.In drilling process, in annular space, the drilling fluid of continuous-flow flows through between the self-excited oscillation cavity 7 and the borehole wall 8 of instrument self-oscillation element of construction 5, through resonance, feedback, the self-oscillation process such as frequency-selecting and amplification, in chamber, form high-low pressure perturbing area, solid jet is modulated into the pulsing jet at outlet 72 places simultaneously, under the double action of the effect of borehole wall higher-pressure region and collar vortex negative pressuren zone B pressure reduction and the souring of entrance radiation low-pressure area A high speed drill well fluids, cutting bed on the borehole wall 8 is destroyed and entrainmented collar vortex negative pressuren zone B, then under the effect of annular space disturbance and drill string rotating, this part landwaste be brought in annular space runner 4 and carry out Separation of Solid and Liquid with returning the solid control equipment that is circulated to ground on annular space drilling fluid, meanwhile, along the high-speed jet of injection unit 9 ejections, wash away, repair the borehole wall, make mud cake attenuation, well become more regular, especially in the salt cream rock stratum of easily necking down, hole diameter is expanded, thereby eliminate on drill string, put and put the phenomenon being hampered with bit freezing.
The present invention is directed to complex structural well because well is clean not and the irregular sand card causing of the borehole wall and blocked portion problem, propose innovatively to utilize the self-excited oscillation cavity of self-oscillation element of construction and the injection unit of high velocity jet that are machined on tool body to be combined with the borehole wall, turbulence level and the pulsation effect of annular fluid have been strengthened, wash away, disturbance and entrainment cutting bed on the borehole wall and the outstanding borehole wall, thereby improve the removing of cutting bed and the thinking of the finishing borehole wall, can effectively eliminate that existence due to cutting bed causes excessive frictional resistance moment of torsion and husky card drilling tool accident and the drill string that causes due to the existence of hole anomaly and necking down is hampered and blocked portion phenomenon, improve the safety of creeping into, be with a wide range of applications.
That the drilling tool of clean well of the present invention has is simple in structure, no-movable part, esy to use, safe and reliable, press consumption low, do not affect drilling tool structure, be applicable to the features such as the cost of multiple offshore boring island, processing and manufacturing and working service is lower, for net horizontal section and the creeping into safely and fast of extended reach well section of complex structural well, there is important practical significance.
Claims (10)
1. the drilling tool of a clean well, comprise body, described body interior is provided with the center flow channels of the perforation of extending along its axis direction, and the upper end of described body is provided with for connecting the top connection of upper drilling string, and the lower end of described body is provided with for connecting the lower contact of lower drilling string, it is characterized in that: in the periphery of described body, have uniformly at intervals annular space runner, the bearing of trend of described annular space runner is consistent with the axis direction of described body, between adjacent described annular space runner, it is lug boss, described lug boss and described annular space runner interval arrange, on described lug boss, depression is provided with self-oscillation element of construction, described self-oscillation element of construction is provided with the self-excited oscillation cavity, axis direction along described body, fluid pressure between described the self-excited oscillation cavity and the borehole wall is divided into entrance radiation low-pressure area, collar vortex negative pressuren zone, negative pressuren zone, border and outlet collision higher-pressure region.
2. the drilling tool of a kind of clean well as claimed in claim 1, is characterized in that: described self-oscillation element of construction comprises the first inclined-plane connecting successively, bottom surface, second inclined-plane parallel with described body axis from bottom to top, and two sides; Angle between described the first inclined-plane and described bottom surface is obtuse angle, and the angle between described the second inclined-plane and described bottom surface is acute angle.
3. the drilling tool of a kind of clean well as claimed in claim 2, is characterized in that: the base on described the first inclined-plane is also connected with the first plane, and the base on described the second inclined-plane is also connected with the second plane.
4. the drilling tool of a kind of clean well as claimed in claim 1, it is characterized in that: described in each, on lug boss, be also provided with at least one injection unit, described injection unit is provided with injection runner, for the cleaner for high-pressure drilling fluid in described body center flow channels is injected into the borehole wall.
5. the drilling tool of a kind of clean well as claimed in claim 4, it is characterized in that: described injection unit comprises the ladder hole being arranged on described lug boss, the axis direction of described ladder hole is along the radially setting of described body, the large nose end of described ladder hole is near the outside of described body, the large nose end of described ladder hole is provided with nozzle, described nozzle has the nozzle flow channel of hollow, and described nozzle flow channel is along the radially setting of described body.
6. the drilling tool of a kind of clean well as described in claim 1 to 5 any one, is characterized in that: in the periphery of described body, have uniformly at intervals at least two described annular space runners, described lug boss is at least evenly equipped with two.
7. the drilling tool of a kind of clean well as claimed in claim 6, is characterized in that: described annular space runner is evenly equipped with three, and described lug boss is evenly equipped with three.
8. the drilling tool of a kind of clean well as claimed in claim 6, is characterized in that: described in each, lug boss is provided with a described self-oscillation element of construction.
9. the drilling tool of a kind of clean well as claimed in claim 6, is characterized in that: described in each, lug boss is provided with some described self-oscillation element of construction.
10. the drilling tool of a kind of clean well as claimed in claim 9, is characterized in that: some described self-oscillation element of construction layout in column, and every row are provided with self-oscillation element of construction described at least one; The described self-oscillation element of construction of same row is coaxially set, and the described self-oscillation element of construction positions of adjacent two row are corresponding or be crisscross arranged.
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| CN201410353821.3A CN104153730B (en) | 2014-07-23 | 2014-07-23 | A kind of drilling tool cleaning well |
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| CN201410353821.3A CN104153730B (en) | 2014-07-23 | 2014-07-23 | A kind of drilling tool cleaning well |
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| CN104153730A true CN104153730A (en) | 2014-11-19 |
| CN104153730B CN104153730B (en) | 2016-07-06 |
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| CN113389513A (en) * | 2020-03-13 | 2021-09-14 | 中国石油天然气集团有限公司 | Horizontal well rock debris removing device and operation method thereof |
| CN115640759A (en) * | 2022-12-26 | 2023-01-24 | 成都捷科思石油天然气技术发展有限公司 | Drill jamming early warning method and system based on machine learning |
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| CN110067551A (en) * | 2019-02-18 | 2019-07-30 | 中国石油集团长城钻探工程有限公司录井公司 | A kind of wellbore cleannes and borehole wall stability quantification method of real-time |
| CN110067551B (en) * | 2019-02-18 | 2023-02-28 | 中国石油天然气集团有限公司 | Quantitative real-time monitoring method for well cleanliness and well wall stability |
| CN113389513A (en) * | 2020-03-13 | 2021-09-14 | 中国石油天然气集团有限公司 | Horizontal well rock debris removing device and operation method thereof |
| CN115640759A (en) * | 2022-12-26 | 2023-01-24 | 成都捷科思石油天然气技术发展有限公司 | Drill jamming early warning method and system based on machine learning |
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