CN203742438U - Well drilling device for intensifying well wall - Google Patents
Well drilling device for intensifying well wall Download PDFInfo
- Publication number
- CN203742438U CN203742438U CN201420154929.5U CN201420154929U CN203742438U CN 203742438 U CN203742438 U CN 203742438U CN 201420154929 U CN201420154929 U CN 201420154929U CN 203742438 U CN203742438 U CN 203742438U
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- piston
- palm
- wall
- nozzle
- well
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- Expired - Fee Related
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Abstract
The utility model belongs to the technical field of petroleum and natural gas drilling equipment, and relates to a well drilling device for intensifying a well wall. The well drilling device for intensifying the well wall comprises a body, wherein a drilling liquid channel is arranged in the axial direction of the body, lateral hydraulic power channels are evenly arranged in the same circumferential direction of the middle of the body, each lateral hydraulic power channel is communicated with the drilling liquid channel, each lateral hydraulic power channel is a through hole provided with two steps, a piston is installed in the middle of each lateral hydraulic power channel, a piston through hole is formed in each piston and along the axis of each piston, a nozzle is installed in each piston through hole, a palm is installed on the outer wall of one side of each piston, a sealing groove along the circumferential direction is formed in the outer wall of the other side of each piston, a jet flow channel is formed in the middle of each palm, each jet flow channel is structurally corresponding to each nozzle, two sides of each palm are connected with stop blocks through springs, the stop blocks are fixedly installed on the body through bolts, and threads are arranged at the upper end and the lower end of the body. The well drilling device for intensifying the well wall is simple in structure, convenient to operate, low in cost, high in work efficiency, capable of suiting different wellbore diameters, and environmentally friendly, and improves mechanical properties of the well wall.
Description
Technical field:
The utility model belongs to oil and natural gas drilling equipment technical field, relates to a kind of drilling tool of strengthening borehole wall performance, particularly a kind of drilling rig of strengthening the borehole wall.
Background technology:
In drilling process, for ensureing wellbore stability, guarantee that Dingan County creeps into entirely, need to rely on drilling well liquid columnpressure to carry out equilibrium strata pressure, but in the well section drilling process of long bore hole, usually can bore the stratum of meeting many cover pressure systems, if the mechanical property on stratum is poor, will make Drilling Fluids ' Safe Density Windows narrow down, between drilling liquid pressure and strata pressure, be difficult to reach balance, both pressure differentials easily cause the generation of down-hole accident over the voltage endurance capability on stratum, such as head of liquid is compared strata pressure when too low, easily there is cave-in, bit freezing; Head of liquid is compared strata pressure when too high, easily causes drilling fluid and misses in a large number, contaminated oil gas reservoir.For the problems referred to above, in the rational situation of drilling fluid composition, at present conventional processing mode is: when pressure anomaly hour, take strong measure of boring to continue to creep into; When pressure anomaly is larger, take to stop boring casing off abnormal formation pressure, yet strong boring easily injured reservoir, although cased mode safety extends drilling period, strengthen wellbore construction and drop into.Therefore, thereby from improving borehole wall mechanical property, expand the angle of Drilling Fluids ' Safe Density Windows, seek to design a kind of drilling tool of strengthening the borehole wall, by acting on jet action and the Compaction of the borehole wall, by the compacting of borehole wall rock stratum; Jet action simultaneously is promptly injected formation fracture by solid phase particles in drilling fluid, forms stress cage effect, improves the mechanical property on borehole wall stratum, thereby improves the voltage endurance capability of the whole borehole wall, reaches the effect of the strengthening borehole wall.
Summary of the invention:
Goal of the invention of the present utility model is to overcome the shortcoming of borehole well instability, leakage in the layer drilling process existing in prior art, seek design a kind of drilling rig of strengthening the borehole wall is provided, when in drilling process, drilling fluid is by this device, the palm that drilling fluid hydraulic pressure can promote this device stretches out and the compacting borehole wall, drilling fluid can form side direction jet by side direction nozzle simultaneously, on the borehole wall, form the artificial borehole wall layer of one deck densification, both synergy improve wall strength.
To achieve these goals, agent structure of the present utility model comprises block, spring, palm, nozzle, piston, sealing, bolt, body, drilling fluid passage, side direction water passage, piston hole, fluidic channel and screw thread; The body of steel structure is axially arranged with drill-in fluid passage, body middle part is upwards evenly provided with 2-4 side direction water passage in same week, each side direction water passage all with drilling fluid passage UNICOM, side direction water passage is the through hole with twice step, for hydraulic tool is installed; In the middle of each side direction water passage, install and be shaped with a piston, each piston is all opened and is shaped with piston hole along axis, and piston hole is installed and is shaped with nozzle; One side outer wall of piston is installed and is shaped with palm, and opposite side outer wall is along being circumferentially with seal groove, and seal groove is built-in with the rubber that adopts soft or hard combination sealing mode to seal; The thickness of palm is determined according to the structure of nozzle; Palm middle part is opened and is shaped with fluidic channel, and fluidic channel is corresponding with the structure of nozzle; The both sides of palm are connected with block by spring, the distance that restriction palm is released by piston; Block is mounted by means of bolts on body; Body upper and lower end parts is provided with the screw thread being connected with outside down-hole equipment.
The utility model is in drilling well cyclic process, part drilling fluid approaching side sprays from nozzle to water passage, form the side direction jet that impacts the borehole wall, side direction jet forms the drilling fluid in drilling fluid passage the mud cake of tough and tensile densification in the process of impacting the borehole wall at the borehole wall, side direction jet has compacting booster action to the borehole wall simultaneously, thereby improves wall strength; Meanwhile, in side direction jet course of injection, the entrance and exit of nozzle can produce pressure reduction, and under this differential pressure action, piston is extrapolated, and palm is released, and compression connects the spring of palm and block; The palm of releasing, near the borehole wall, further by wall cake compacting, improves wall strength; Palm can be released and retract according to the variation of borehole diameter, and always near the borehole wall, makes jet in optimum, spray distance all the time to the spray distance of borehole wall effect, increases work efficiency; When stopping drilling well, compressed spring will restore gradually, and the palm of releasing is kept in the center.
The utility model and prior art now than, it is simple in structure, easy to operate, cost is low, operating efficiency is high, can adapt to different borehole diameter, improves borehole wall mechanical property, environmental friendliness.
Accompanying drawing explanation:
Fig. 1 is agent structure principle schematic of the present utility model.
Fig. 2 is the I position partial structurtes principle schematic shown in the utility model Fig. 1.
The specific embodiment:
Below by embodiment, be also described further by reference to the accompanying drawings.
Embodiment:
The agent structure of the present embodiment comprises block 1, spring 2, palm 3, nozzle 4, piston 5, sealing 6, bolt 7, body 8, drilling fluid passage 9, side direction water passage 10, piston hole 11, fluidic channel 12 and screw thread 13; The body 8 of steel structure is axially arranged with drill-in fluid passage 9,8 same weeks of middle part of body are upwards evenly provided with 2-4 side direction water passage 10, each side direction water passage 10 all with drilling fluid passage 9 UNICOMs, side direction water passage 10 is for having the through hole of twice step, for hydraulic tool is installed; The centre of each side direction water passage 10 is all installed and is shaped with a piston 5, and each piston 5 is all opened and is shaped with piston hole 11 along axis, and piston hole 11 is installed and is shaped with nozzle 4; One side outer wall of piston 5 is installed and is shaped with palm 3, and opposite side outer wall is along being circumferentially with seal groove 6, and seal groove 6 is built-in with rubber, and rubber adopts the mode of soft rubber and hard rubber combination sealing to be sealed in seal groove 6; The thickness of palm 3 is determined according to the structure of nozzle 4; Palm 3 middle parts are opened and are shaped with fluidic channel 12, and fluidic channel 12 is corresponding with the structure of nozzle 4; The both sides of palm 3 are connected with block 1 by spring 2, the distance that restriction palm 3 is released by piston 5; Block 3 is fixedly mounted on body 8 by bolt 7; Body 8 upper and lower end parts are provided with the screw thread 13 being connected with outside down-hole equipment.
The present embodiment is in drilling well cyclic process, part drilling fluid approaching side is to water passage 10 from nozzle 4 ejections, form the side direction jet that impacts the borehole wall, side direction jet forms the drilling fluid in drilling fluid passage 9 mud cake of tough and tensile densification in the process of impacting the borehole wall at the borehole wall, side direction jet has compacting booster action to the borehole wall simultaneously, thereby improves wall strength; Meanwhile, in side direction jet course of injection, the entrance and exit of nozzle 4 can produce pressure reduction, and under this differential pressure action, piston 5 is extrapolated, and palm 3 is released, and compression connects the spring 2 of palm 3 and block 1; The palm 3 of releasing, near the borehole wall, further by wall cake compacting, improves wall strength; Palm 3 can be released and retract according to the variation of borehole diameter, and always near the borehole wall, makes jet in optimum, spray distance all the time to the spray distance of borehole wall effect, increases work efficiency; When stopping drilling well, compressed spring 3 will restore gradually, and the palm 3 of releasing is kept in the center.
Claims (1)
1. strengthen a drilling rig for the borehole wall, it is characterized in that agent structure comprises block, spring, palm, nozzle, piston, sealing, bolt, body, drilling fluid passage, side direction water passage, piston hole, fluidic channel and screw thread; The body of steel structure is axially arranged with drill-in fluid passage, and body middle part is upwards evenly provided with 2-4 side direction water passage in same week, each side direction water passage all with drilling fluid passage UNICOM, side direction water passage is the through hole with twice step; In the middle of each side direction water passage, install and be shaped with a piston, each piston is all opened and is shaped with piston hole along axis, and piston hole is installed and is shaped with nozzle; One side outer wall of piston is installed and is shaped with palm, and opposite side outer wall is along being circumferentially with seal groove, and seal groove is built-in with rubber; The thickness of palm is determined according to the structure of nozzle; Palm middle part is opened and is shaped with fluidic channel, and fluidic channel is corresponding with the structure of nozzle; The both sides of palm are connected with block by spring; Block is mounted by means of bolts on body; Body upper and lower end parts is provided with the screw thread being connected with outside down-hole equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154929.5U CN203742438U (en) | 2014-04-01 | 2014-04-01 | Well drilling device for intensifying well wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154929.5U CN203742438U (en) | 2014-04-01 | 2014-04-01 | Well drilling device for intensifying well wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203742438U true CN203742438U (en) | 2014-07-30 |
Family
ID=51342255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420154929.5U Expired - Fee Related CN203742438U (en) | 2014-04-01 | 2014-04-01 | Well drilling device for intensifying well wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203742438U (en) |
-
2014
- 2014-04-01 CN CN201420154929.5U patent/CN203742438U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20150401 |
|
| EXPY | Termination of patent right or utility model |