CN212428580U - Horizontal section efficient non-support oscillation drilling tool - Google Patents
Horizontal section efficient non-support oscillation drilling tool Download PDFInfo
- Publication number
- CN212428580U CN212428580U CN202022209083.9U CN202022209083U CN212428580U CN 212428580 U CN212428580 U CN 212428580U CN 202022209083 U CN202022209083 U CN 202022209083U CN 212428580 U CN212428580 U CN 212428580U
- Authority
- CN
- China
- Prior art keywords
- drilling tool
- drill
- horizontal section
- drill bit
- horizontal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model belongs to the technical field of horizontal section horizontal well technique drilling tool, concretely relates to high-efficient no righting vibration drilling tool of horizontal section. The utility model comprises a drill bit, a single-bending screw rod, a directional joint and a non-magnetic drill collar; the drill bit, the single-bending screw, the directional joint and the non-magnetic drill collar are sequentially detachably connected. The utility model discloses can make the annular space of drilling tool minimum department in the pit by original 2-6mm, increase by a wide margin is 44-51 mm. The increase of annular space passageway is favorable to the pit shaft to be clean, simultaneously greatly reduced the frictional resistance between drilling tool and the wall of a well. The hydraulic oscillation component is arranged, and axial vibration is generated by the hydraulic oscillation component, so that the effectiveness of the transmission of the bit pressure in the drilling process is improved, the friction between the down-hole drilling tool assembly and a well hole is reduced, and the problem that the bit pressure is transmitted to a drill bit is greatly solved. The utility model discloses have good steady oblique effect, satisfied the horizontal segment drilling construction requirement, be favorable to the horizontal segment to visit the layer, look for the layer and extend the horizontal segment, improve horizontal well efficiency of construction.
Description
Technical Field
The utility model belongs to the technical field of horizontal section horizontal well technique drilling tool, concretely relates to high-efficient no righting vibration drilling tool of horizontal section.
Background
The horizontal section horizontal well technology is widely applied to various oil and gas fields in the world, and the technical advantages are obvious. For thick oil and gas reservoirs, low-porosity and low-permeability oil and gas reservoirs and thin oil and gas reservoirs, the seepage area is increased by the long horizontal section, the number of fracturing modification sections can be increased, and the development efficiency and yield are improved. In addition, compared with a straight well and a common horizontal well, the horizontal well saves the cost of well site land, moving and installing a drilling machine and the like, and the horizontal-section horizontal well drilling technology realizes high-efficiency and large-scale development of compact oil, thereby saving land resources and improving economic and social values. In recent years, the drilling cost of a long horizontal section horizontal well is reduced to 2-2.5 times or even lower than that of a vertical well, and the yield is 5-8 times or even higher than that of the vertical well.
In order to keep the horizontal well deviation stable and unchanged in the horizontal drilling construction and prevent the over-large or over-small well deviation caused by composite drilling, a double-centralizer deviation stabilizing drilling tool combination is often adopted to achieve the deviation stabilizing effect. However, with the extension of the horizontal section, the problems of the lengthening of the open hole section, the increase of the friction torque, the high extension difficulty of the horizontal section and the like exist, the friction torque of construction can be further increased by the combination of the double-support steady-inclination drill, and the contradiction between the combination of the double-support steady-inclination drill and friction reduction resistance reduction becomes an important technical problem for controlling the track of the horizontal section well.
In order to achieve good inclination stabilizing effect in the horizontal section drilling process, a down-hole drilling tool assembly with 2 centralizers (the diameters of the centralizers are only 2-6mm smaller than the diameter of a drill bit), namely a double-centralizing drilling tool assembly, is often adopted, and as shown in fig. 3, the down-hole drilling tool assembly comprises a drill bit 1 and a single-bent screw 2: the downhole power drilling tool consists of a downhole power drilling tool motor B, a stabilizer C, a directional joint D and a non-magnetic drill collar E, wherein all the components are connected through a thread H. In the figure 3, F is the 1 st centralizer, G is the 2 nd centralizer, the distance between the two centralizers F and G can be adjusted by adding joints through a single-bending screw B and a stabilizer C, the diameters of the centralizers F and G are only 2-6mm smaller than the diameter of a drill bit, and the drilling tool assembly can achieve a good inclination stabilizing effect by adjusting the distance between the diameters of the centralizers. In fig. 3, L is a bending point of a single-bending screw B, and the well deviation and the direction of the well track can be changed through the single-bending screw B in the sliding drilling process, so that the drill bit is controlled to drill towards a region with more enriched oil and gas.
The inclination stabilizing drilling tool assembly is a rigid full-hole drilling tool structure, namely 2-3 stabilizers are connected with a drill collar through a screw rod, and the rigidity of the lower drilling tool assembly is increased to control the lower drilling tool to achieve the effect of stabilizing the well inclination and the direction under the action of the bit pressure. In order to achieve a steady inclination effect in a drilling assembly, a centralizer must be chosen which is very small in relation to the diameter of the drill bit, causing the drilling to be full, which causes the following problems:
(1) large friction torque: the full-hole centralizer increases the contact area of the drilling tool and the well wall, increases the frictional resistance, greatly increases the friction resistance and the torque of the underground drilling tool and the well wall, and the longer the horizontal section is, the larger the friction resistance torque has the influence on the drilling;
(2) difficulty in sliding orientation: during sliding drilling, a drilling tool does not rotate, the friction between the drilling tool and a well wall reaches the maximum, the longer the horizontal section is, the more difficult the transmission of drilling pressure is, part of the drilling pressure is offset by the friction force between a centralizer of the drilling tool and the well wall, and the drilling pressure is difficult to transmit to a drill bit, so that the sliding efficiency is poor;
(3) difficult cleaning of the shaft: the annular space gap at the centralizer is small, the flow channel is not smooth, the movement of rock debris is blocked, the movement speed is slow, the rock debris is easy to deposit on the lower edge of the well hole, sediment and sand bridges are easy to form, a rock debris bed is formed, and the friction resistance between the drilling tool and the well wall can be increased due to the existence of the rock debris bed.
For the reasons, the drilling speed is influenced, the horizontal section is difficult to extend and drill, and drilling accidents such as drill sticking and the like can be caused under the complex conditions of mudstone expansion, diameter shrinkage, sand deposition, sand blockage and the like.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high-efficient no righting vibration drilling tool of horizontal segment, aim at provide one kind rub hinder the moment of torsion little, slide directional convenient, and the clean simple drilling tool combination of pit shaft.
In order to realize the purpose, the utility model discloses a technical scheme is:
a horizontal section high-efficiency non-centralizing oscillation drilling tool comprises a drill bit, a single-bending screw rod, a directional joint and a non-magnetic drill collar; the drill bit, the single-bent screw, the directional joint and the non-magnetic drill collar are sequentially detachably connected; the middle part of the single-bending screw rod is provided with a bend, and the bend forms a lever fulcrum.
The drill bit, the single-bending screw, the directional joint and the non-magnetic drill collar are connected through threads.
The hydraulic oscillating component is also included; and the disc valve assembly of the hydraulic oscillation part is connected to the bottom of the power part of the single-bending screw rod.
The hydraulic oscillation part adopts a hydraulic oscillator.
The distance from the lever fulcrum to the single-bending screw and the drill bit joint is X, and the range of the value of X is 2-3 m.
The angle between the reverse extension line of one side of the included angle formed by bending the middle part of the single-bent screw and the other side is 0.25 degrees, 0.5 degrees, 0.75 degrees, 1 degree, 1.25 degrees or 1.5 degrees.
Has the advantages that:
(1) compared with the prior art, the utility model, reduced two centralizer, the annular space clearance that makes drilling tool minimum department in the pit is by original 2-6mm, increase by a wide margin is 44-51 mm. The increase of annular space passageway is favorable to the pit shaft to be clean, simultaneously greatly reduced the frictional resistance between drilling tool and the wall of a well.
(2) The utility model discloses the setting of well water conservancy oscillating part through the axial vibration that self produced, has improved the validity that creeps into the in-process weight on bit transmission to reduce the friction between drilling tool combination and the well and hinder, very big solution the problem that the weight on bit transmitted the drill bit.
(3) The utility model discloses have good steady oblique effect, satisfied the horizontal segment drilling construction requirement, be favorable to the horizontal segment to visit the layer, look for the layer and extend the horizontal segment, improve horizontal well efficiency of construction.
The above description is only an overview of the technical solution of the present invention, and in order to clearly understand the technical means of the present invention and to implement the technical solution according to the content of the description, the following detailed description is given with reference to the preferred embodiments of the present invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a configuration diagram of the present invention;
FIG. 2 is a schematic view of FIG. 1 with the centralizer removed;
FIG. 3 is a prior art drill tool configuration;
FIG. 4 is a diagram showing the relationship between the deflecting force and the orientation force;
FIG. 5 is a schematic diagram showing the effect of the distance between the fulcrum of the single-bent screw and the drill bit on the lateral force of the drill bit.
In the figure: 1-a drill bit; 2-single-bending screw; 3-a stabilizer; 4-an orientation joint; 5-no magnetic drill collar; 6-a first centralizer; 7-a second centralizer; 8-thread screwing; 9-a hydro-oscillating component; 10-fulcrum of lever; 11-an annular space; the distance from the X-lever fulcrum to the joint of the single-bending screw rod and the drill bit; y-bit lateral force.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1 and 2, a horizontal section efficient non-centralizing oscillation drilling tool comprises a drill bit 1, a single-bending screw 2, a directional joint 4 and a non-magnetic drill collar 5; the drill bit 1, the single-bent screw 2, the directional joint 4 and the non-magnetic drill collar 5 are sequentially detachably connected; the middle part of the single-bending screw rod 2 is bent, and a lever fulcrum 10 is formed at the bent part.
Compared with the prior art, the double-centralizer drilling tool combination reduces two centralizers, so that the annular space 11 at the minimum position of the drilling tool is increased by 44-51mm from the original 2-6mm, as shown in figure 3. The increase of the annular channel is very beneficial to the cleaning of the shaft, and simultaneously, the frictional resistance between the drilling tool and the shaft wall is greatly reduced.
Two centralizers are reduced, the sliding drilling efficiency can be greatly improved, the sliding well section is reduced, the horizontal section layer detection and layer finding are facilitated, the horizontal section extension is facilitated, and the construction benefit of the horizontal well is improved.
Example two:
referring to fig. 1 and 2, a horizontal section high-efficiency non-centralizing vibration drilling tool is different from the first embodiment in that: the drill bit 1, the single-bending screw 2, the directional joint 4 and the non-magnetic drill collar 5 are connected through a thread 8.
In practical use, the drill bit 1, the single-bent screw 2, the directional joint 4 and the non-magnetic drill collar 5 are connected through the thread 8, so that the connection, the disassembly and the maintenance are very convenient.
Example three:
referring to a horizontal section efficient non-centralizing oscillation drilling tool shown in fig. 1 and 2, on the basis of the first embodiment: further comprises a hydraulic oscillating part 9; and a disc valve assembly of the hydraulic oscillation part 9 is connected to the bottom of a power part of the single-bending screw 2.
Further, the hydraulic oscillating component 9 is a hydraulic oscillator.
When the hydraulic single-bent screw rod is actually used, the hydraulic oscillation part 9 is arranged in the single-bent screw rod 2, the disc valve assembly of the hydraulic oscillation part 9 is connected to the bottom of the power part of the single-bent screw rod 2, the power of the screw rod is converted into hydraulic pressure pulses, and the pressure pulses are fed back to the oscillation part 9 to generate shaft oscillation, so that the hydraulic pressure pulses are converted into mechanical energy oscillating up and down in the shaft direction. Through the axial vibration that hydraulic oscillation part 9 self produced, improve the validity and the reduction of creeping into the in-process weight on bit transmission the utility model discloses and the friction between the well hinders, very big solution the problem that the weight on bit transmitted the drill bit, effectively improved drilling efficiency.
Example four:
referring to a horizontal section efficient non-centralizing oscillation drilling tool shown in fig. 1 and 2, on the basis of the first embodiment, the second embodiment or the third embodiment: the distance from the lever fulcrum 10 to the joint of the single-bending screw 2 and the drill bit 1 is X, and the range of the value of X is 2 m-3 m.
Further, the angle between the reverse extension line of one side of the included angle formed by bending the middle part of the single-bent screw 2 and the other side is 0.25 °, 0.5 °, 0.75 °, 1 °, 1.25 ° or 1.5 °.
When the in-service use, the utility model discloses be in when the slip creeps into the state, if X value increase, the weight-on-bit passes through the drilling tool transmission to L is the lever fulcrum, uses X as the lever arm, then lasts the yawing force Y for the drill bit and will increase, makes the slope rate improvement by a wide margin of sliding. The utility model discloses when being in compound state of creeping into, owing to select the best X value through the atress analysis, the drill bit uses drilling tool combination axle in the pit as the center to X is carried out the rotation in the same time for the dance arm, produces the coaxial effect of top, makes the drill bit creep into along original well orbit direction, thereby the drilling tool compound slope of making is low. The range of X is preferably 2m to 3 m.
In order to obtain the X value more accurately, the following method can be adopted for calculation.
The method comprises the following steps: determining the distance X from a lever fulcrum 10 on the single-bending screw 2 to the joint of the single-bending screw 2 and the drill bit 1;
step two: selecting a screw rod 2 with the size of the required corresponding bending point angle according to the result obtained in the step one and the geological and construction requirements of a drilling site, and then adjusting the bending point angle of the screw rod 2;
step three: a drill bit 1, a single-bent screw rod 2, a directional joint 4 and a non-magnetic drill collar 5 are arranged; the drill bit 1, the single-bent screw 2, the directional joint 4 and the non-magnetic drill collar 5 are sequentially detachably connected;
step four: and applying corresponding bit pressure to the horizontal section high-efficiency non-support oscillation drilling tool combination in the drilling construction process to implement exploitation.
The method for determining the distance X from the lever fulcrum 10 on the single-bending screw 2 to the joint of the single-bending screw 2 and the drill bit 1 comprises the following steps:
the first step is as follows: calculating the guiding force
Determining the position of the drill bit according to the well inclination angle and the azimuth angle of the drill bit, setting the initial position as 0 degree, dividing a circle of rotation into four intervals by the inclination increasing position, the inclination decreasing position, the azimuth increasing position and the azimuth decreasing position, and carrying out distribution force averaging to obtain the magnitude of the guiding force applied to the drill bit;
the stress at the drill bit is represented by a vector, the vector FHi can be decomposed into a guiding force Fxi and an azimuth force Fyi, and the included angle between the guiding force Fxi and the azimuth force Fyi is alphaiI.e. the azimuth angle. Setting Fx as the angle increasing direction force, Fy as the azimuth direction force, the resultant guiding force received at the drill bit as FHi,
Namely:
when n is 0 to 90,
the resultant force of the increasing of the guiding force, the inclining and the increasing of the direction is obtained;
when n is 91-180 degrees,
the resultant force of the direction of the guiding force is reduced, inclined and increased;
when n is 181-,
the resultant force of the direction force reducing and the direction of the slope descending is obtained;
when n is 271-,
the resultant force of the direction force increasing the inclination descending direction and the inclination descending direction is obtained;
the resultant force is:
the second step is that: the determined value of X;
and respectively bending the single-bent screw rods 2 with the X values of 1m, 1.5m, 2m, 2.5m and 3m by corresponding angles, then putting the connected horizontal section high-efficiency non-support vibration drilling tool combination into a well, then applying pressure to the horizontal section high-efficiency non-support vibration drilling tool combination on the ground, measuring the lateral force of the drill bit 1, and selecting the X value according to the measured data and the service life factors of the drilling tool.
And the pressure value for applying pressure to the horizontal section high-efficiency non-centralizing vibration drilling tool assembly on the ground is obtained by subtracting the weight of the screw from the preset bit pressure.
The simulation calculation was performed using the following constraints (where φ represents a diameter):
the drilling tool combination comprises a phi 215.9mmPDC drill bit, a 9LZ phi 165 screw (0.75), 1 drill collar with the diameter of 159mm, 1 short drill collar with the diameter of 159mm (3m), 159 drill collar with the diameter of 159mm and a drill rod with the diameter of 127 mm.
Density of slurry: 1.15mg/cm3；
Rotating speed of the turntable: 60r min;
drilling pressure: 25 kN;
length of screw: 6.5 m;
weight of the screw: 830 kg;
oblique angle of well: at 90 deg..
The X values are calculated at distances of 1m, 1.5m, 2m, 2.5m and 3m from the drill bit respectively, and the result is shown in figure 5. As can be seen from FIG. 5, the change in the distance from the fulcrum to the point where the single-turn screw and bit joint are located, namely X, has a great influence on the bit lateral force, and the bit 1 lateral force changes from-485.75N to-763.52N when X changes from 1m to 3m, and is increased by almost 2 times. Considering the service life of the drilling tool, the steel grade material of the drilling tool and other factors, when the X value is as follows: the most preferable range is 2.5 to 3 m.
3. Conditions of field test
The utility model discloses the field test has been carried out in the regional white star H1 of some oil field longdong, two exploratory well horizontal wells of white star H2.
Drilling tool combination: a phi 215.9mm drill bit (5 blades, phi 16mm teeth), a phi 172mm near-bit orientation gamma (length is 0.8m), a phi 172mm adjustable oscillation screw (1.25 degrees, length is 8.09m), a 411, 410 float valve, a 411, 410 directional joint, a 411, 410 non-magnetic short drill collar, a phi 172mm non-magnetic insulating short section, a phi 127mm non-magnetic pressure-bearing drill rod, a phi 127mm weighted drill rod 3 column, a phi 127mm drill rod (85 column), a phi 127mm weighted drill rod 13 column and a phi 127mm drill rod;
the X value is: 2.76 m;
the drilling parameters were as follows:
composite weight on bit: 40-60 KN;
directional weight on bit: 200-240KN (friction resistance 12-16T);
rotating speed: 40-45 r/min;
discharge capacity: 28-32L/S;
pumping pressure: 14-16 Mpa;
density of slurry: 1.24-1.29g/cm3；
Viscosity: 49-52S;
water loss: 3.5-4, pH 9.0.
In the test, the utility model is adopted, the friction resistance is lifted and lowered to 12 tons from 24 tons of the double-support drilling tool combination, and the friction resistance is reduced by 50 percent; and the adoption of the utility model discloses, the horizontal segment construction slip build-up rate is up to 9-13 degree/30 m, and the compound build-up rate is 0.2-0.5 degree/100 m. The continuous composite drilling of 131 meters is created, the well deviation is only slightly increased by 0.3 degrees, the sliding efficiency of the technology is high, the deviation stabilizing effect is good, the sliding well section is reduced, the horizontal section layer detection and layer finding are facilitated, the horizontal section extension is facilitated, and the construction efficiency of the horizontal well is improved.
Table 1 partial data table of trace of H2 horizontal segment
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a horizontal segment is high-efficient does not have and holds up vibration drilling tool which characterized in that: comprises a drill bit (1), a single-bent screw (2), a directional joint (4) and a non-magnetic drill collar (5); the drill bit (1), the single-bent screw (2), the directional joint (4) and the non-magnetic drill collar (5) are sequentially detachably connected; the middle part of the single-bending screw rod (2) is provided with a bend, and a lever fulcrum (10) is formed at the bend.
2. A horizontal section high efficiency walk-free oscillating drill as claimed in claim 1, wherein: the drill bit (1), the single-bending screw (2), the directional joint (4) and the non-magnetic drill collar (5) are connected through a thread (8).
3. A horizontal section high efficiency walk-free oscillating drill as claimed in claim 1, wherein: also comprises a hydraulic oscillating component (9); and a disc valve assembly of the hydraulic oscillation part (9) is connected to the bottom of a power part of the single-bent screw (2).
4. A horizontal section high efficiency walk-free oscillating drill as claimed in claim 3, wherein: the hydraulic oscillation part (9) adopts a hydraulic oscillator.
5. A horizontal section high efficiency walk-free oscillating drill as claimed in claim 1, wherein: the distance from the lever fulcrum (10) to the joint of the single-bending screw (2) and the drill bit (1) is X, and the range of the X value is 2-3 m.
6. A horizontal section high efficiency walk-free oscillating drill as claimed in claim 1, 2 or 3, wherein: the angle between the reverse extension line of one side of the included angle formed by bending the middle part of the single-bent screw rod (2) and the other side is 0.25 degrees, 0.5 degrees, 0.75 degrees, 1 degree, 1.25 degrees or 1.5 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022209083.9U CN212428580U (en) | 2020-09-30 | 2020-09-30 | Horizontal section efficient non-support oscillation drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022209083.9U CN212428580U (en) | 2020-09-30 | 2020-09-30 | Horizontal section efficient non-support oscillation drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212428580U true CN212428580U (en) | 2021-01-29 |
Family
ID=74279653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022209083.9U Active CN212428580U (en) | 2020-09-30 | 2020-09-30 | Horizontal section efficient non-support oscillation drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212428580U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081528A (en) * | 2020-09-30 | 2020-12-15 | 中国石油天然气集团有限公司 | Horizontal section efficient support-free oscillating drilling tool combination and method |
| CN115341868A (en) * | 2022-08-23 | 2022-11-15 | 中国石油天然气集团有限公司 | Device for reducing friction resistance in slim hole coiled tubing drilling and using method thereof |
-
2020
- 2020-09-30 CN CN202022209083.9U patent/CN212428580U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081528A (en) * | 2020-09-30 | 2020-12-15 | 中国石油天然气集团有限公司 | Horizontal section efficient support-free oscillating drilling tool combination and method |
| CN115341868A (en) * | 2022-08-23 | 2022-11-15 | 中国石油天然气集团有限公司 | Device for reducing friction resistance in slim hole coiled tubing drilling and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104481398B (en) | A kind of three-dimensional horizontal well drilling construction method | |
| CN104481400B (en) | A kind of three-dimensional horizontal well track control method | |
| CN212428580U (en) | Horizontal section efficient non-support oscillation drilling tool | |
| CN112081528A (en) | Horizontal section efficient support-free oscillating drilling tool combination and method | |
| CN105298463B (en) | Gas hydrates big well multiple-limb radially horizontal well completion method | |
| CN107366531B (en) | One kind being based on the horizontal docking style geothermal well borehole track of inclined shaft and design method | |
| CN109915018B (en) | Method for determining tool face angle in three-dimensional borehole trajectory control | |
| CN104790918B (en) | Cluster well combines ground method for exploiting coal bed methane with horizontal well under MODEL OVER COMPLEX TOPOGRAPHY | |
| CN109098661A (en) | Two-way pairs of drilling method | |
| CN111441718A (en) | Construction method, system and application for high-precision pilot shaft excavation of large-section steep slope long inclined shaft | |
| Xia et al. | Key technologies for well drilling and completion in ultra-deep sour gas reservoirs, Yuanba Gasfield, Sichuan Basin | |
| GB2169631A (en) | Directional drilling | |
| CN103541657A (en) | Drilling tool and construction method for oil gas well hard formation sidetracking | |
| CN103993828B (en) | Method of constructing gradually-increased type transition circular curve well track | |
| CN101701506A (en) | Drilling tool structure with three stabilizers | |
| CN102242603A (en) | Bottom drilling tool combination with double stabilizers resisting deviation by using prebuckling dynamics | |
| CN103485719B (en) | A kind of gas water horizontal well drilling rig structure | |
| CN201554370U (en) | Four-in-one drilling tool structure with three centering devices | |
| CN204804733U (en) | Fusiformis drift size gauge tool instrument | |
| CN203570203U (en) | Natural gas horizontal well vertical well section quick drilling mechanism | |
| Colebrook et al. | Application of steerable rotary drilling technology to drill extended reach wells | |
| CN207177733U (en) | A kind of side slope rig for carrying guide instrument | |
| CN111197461A (en) | Horizontal well suspended sidetracking method and sidetracking tool | |
| CN115270345B (en) | Calculation method based on continuous Liang Shengsuo coring anti-skew drilling tool mechanical model | |
| Pendleton | Horizontal drilling review |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |