Background technology
Can bore bridging plug because the feature that its volume is little, quality is light, packing is effective, easy brill removes is widely used in temporary transient or permanent shutoff operation, for example, the disclosed a kind of nonmetallic drillable bridge plug of China Patent No. " 201120194681.1 ", open day is 2012-01-11.Coiled tubing quick drill is that bridging plug bores a mainstream technology of removing except bridging plug to carry out formation testing and try to repair operation.
After continuous tubing drill mill bridging plug, produce a large amount of fragments, its material comprises the various composite materials such as cast iron, rubber, glass fiber, resin.Affected by the pressure of the drill and drilling speed and material self character, the drilled mill of these composite materials forms out-of-shape, the inhomogeneous fragment of particle diameter afterwards, some volume of fragment is larger, fall rate is high, can not be recycled out ground, finally around coiled tubing and sleeve pipe inner suspension or accumulation, easily cause instrument, coiled tubing to be blocked and later stage examination is repaiied operation and cannot be carried out, increase well control risk and difficulty of construction, greatly affected Oil/gas Well production.
Existing manner of cleaning up is to utilize coiled tubing to carry syringe pipe to carry out fragment flushing, this syringe pipe is mainly used in sand washing operation, its design mainly meets settling rate and the particle size feature of sand, do not have to consider to bore the large particle diameter of bridging plug fragment and the various feature of material, can bore in a large number fragment and often be difficult to clean out pit shaft, often cause instrument and coiled tubing to be occurred by card accident, and later stage examination is repaiied operation and cannot be carried out.So can not meeting cleaning, existing syringe pipe can bore the needs of bridging plug fragment.
Summary of the invention
The purpose of this utility model is to overcome the problems referred to above that can bore the existence of bridging plug defragmentation for existing Oil/gas Well, provides a kind of Oil/gas Well with boring bridging plug debris cleaning tool.The utility model can be realized bridging plug defragmentation in straight well, high angle hole or horizontal well, fragment can be returned fast and drains into ground, guarantees that pit shaft is clean, unimpeded.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of Oil/gas Well is with boring bridging plug debris cleaning tool, it is characterized in that: comprise and be in turn connected into the jointing of one, upper drag reduction conical body, cylindrical body and lower drag reduction conical body, the inner chamber of jointing, upper drag reduction conical body, cylindrical body and lower drag reduction conical body is communicated with, in upper drag reduction conical body, be provided with to the first nozzle of well head direction hydrojet, the middle part of lower drag reduction conical body is provided with to the second nozzle of the borehole wall and well head direction hydrojet, and the end of lower drag reduction conical body is provided with the 3rd nozzle to shaft bottom hydrojet.
Described the first nozzle is four, is arranged in nozzle cage, and is evenly distributed in drag reduction conical body.
Described second nozzle is six, is distributed in the shape of a spiral in lower drag reduction conical body, and is uniformly distributed to the borehole wall and well head direction 360 degree.
Described the 3rd nozzle is three, and is evenly distributed on the end of lower drag reduction conical body, respectively three direction hydrojets to shaft bottom.
Described the first nozzle is different size four.
Employing the utility model has the advantage of:
One, the utility model comprises the jointing that is in turn connected into one, upper drag reduction conical body, cylindrical body and lower drag reduction conical body, jointing, upper drag reduction conical body, the inner chamber of cylindrical body and lower drag reduction conical body is communicated with, in upper drag reduction conical body, be provided with to the first nozzle of well head direction hydrojet, the middle part of lower drag reduction conical body is provided with to the second nozzle of the borehole wall and well head direction hydrojet, the end of lower drag reduction conical body is provided with the 3rd nozzle to shaft bottom hydrojet, adopt this structure, can be at straight well, in high angle hole or horizontal well, realize bridging plug defragmentation, fragment can be returned fast and drains into ground, guarantee that pit shaft is clean, unimpeded.
Two, in the utility model, three of bottoms of lower drag reduction conical body nozzle forms three High-Pressure Waters that direction is sprayed to shaft bottom, the bridging plug fragment that is settled down to horizontal wellbore section is washed to horizontal well barrel, be suspended in well liquid, three directions are sprayed, guarantee that each orientation fragment can be washed into, and stable suspersion; , because cleaning tool has liquid ejection forward all the time, bridging plug fragment, chip or sand are rushed meanwhile, effectively avoid fragment flushing tool to insert in a large amount of fragments and cause lock of tool drilling to occur.
Three,, in the utility model, the nozzle of six helical arrangement in lower drag reduction conical body side, forms to the borehole wall and well head direction 360 degree and is uniformly distributed, and acts on the fragment fluid column that nozzle punching band suspends effectively, comprehensively; Backward, return liquid and have swabbing action, the fragment effectively nozzle punching band being suspended carries toward well head direction; The combination of second nozzle and the 3rd nozzle, being conducive to spray liquid forms large pressure reduction, high velocity liquid stream fragment spiral speedup is carried on the first nozzle liquid stream and is returned in the zone of action, as far as possible the punching of bridging plug fragment is brought to away from flushing tool outer wall and coiled tubing wall, to coiled tubing and sleeve pipe annular space, effectively prevent that lock of tool drilling from occurring.
Four, in the utility model, lower drag reduction conical body can reduce flushing tool to fragment active force angle, simultaneously, ground continuous oil pipe device suspending weight is changed more obvious, effectively anti-sticking, after bit freezing, need to carry in unfreezing tonnage less, the 3rd nozzle punching band suspension fragment returns on more easily under second nozzle effect and enters coiled tubing and sleeve pipe annular space.
Five, in the utility model, cylindrical body is without the design of nozzle, shiny surface, makes fragment be subject to liquid stream ejection side at cylindrical body and sleeve pipe annular space almost nil to active force, thereby, more easily, return in the useful effect region that enters into the first nozzle, effectively reduce fragment bit freezing risk; Meanwhile, the instrument that can play is placed in the middle and increase the effect of instrument intensity, avoids conical body to be close to casing wall wearing and tearing, guarantees that second nozzle and the 3rd nozzle ejection liquid are all the time in direction effectively and reasonably.
Six, in the utility model, High-Pressure Water is through four nozzles of upper drag reduction conical body, form the High-Pressure Water to well head direction spray back, upper drag reduction conical body is according to hole condition, can select the first nozzle of different specification size to be installed in nozzle cage, backward, hydrojet obliquely, on guaranteeing, return and carry fragment liquid and there is optimized discharge capacity and speed.
Seven, the utility model is compared and in cylindrical body, is designed nozzle, conical body top nozzle size design is larger, can obtain higher ejection discharge capacity and speed, the larger liquid spray angle that sprays to coiled tubing and casing annulus, thereby, can effectively reduce the friction probability of liquid stream, fragment and coiled tubing and sleeve pipe, reduce liquid stream and fragment friction loss, obtain larger upward velocity.
To sum up, the utility model patent principle is clear, be skillfully constructed, simple in structure, volume is little, efficiency is high, fast demountable moves, strong adaptability, safe and reliable, be applicable to cleaning dissimilar, different-grain diameter drilling cuttings, the requirement of cleaning continuous tubing drill mill bridging plug fragment can be met, Oil/gas Well down-hole fragment, chip, sand and impurity prune job under all kinds and condition can be widely used in.
Detailed description of the invention
Embodiment 1
A kind of Oil/gas Well is with boring bridging plug debris cleaning tool, comprise and be in turn connected into the jointing 4 of one, upper drag reduction conical body 3, cylindrical body 2 and lower drag reduction conical body 1, the inner chamber of jointing 4, upper drag reduction conical body 3, cylindrical body 2 and lower drag reduction conical body 1 is communicated with, in upper drag reduction conical body 3, be provided with the first nozzle 5 to well head direction hydrojet, the middle part of lower drag reduction conical body 1 is provided with to the second nozzle 6 of the borehole wall and well head direction hydrojet, and the end of lower drag reduction conical body 1 is provided with the 3rd nozzle 7 to shaft bottom hydrojet.
Preferred embodiment of the present utility model is that described the first nozzle 5 is four, is arranged in nozzle cage, and is evenly distributed in drag reduction conical body 3.
Another preferred embodiment of the present utility model is that described second nozzle 6 is six, is distributed in the shape of a spiral in lower drag reduction conical body, and is uniformly distributed to the borehole wall and well head direction 360 degree.
Another preferred embodiment of the present utility model is that described the 3rd nozzle 7 is three, and is evenly distributed on the end of lower drag reduction conical body 1, respectively three direction hydrojets to shaft bottom.
Another preferred embodiment of the present utility model is, described the first nozzle 5 is different size four.
Operating principle of the present utility model is: flushing fluid is entered and can be bored bridging plug debris cleaning tool by coiled tubing, sprays respectively through four the first nozzles in lower drag reduction conical body bottom three the 3rd nozzles, six, middle part second nozzle and upper drag reduction conical body from fore-and-aft direction.
Embodiment 2
The utility model is with continuous tubing drill mill bridging plug afterflush pit shaft in Oil/gas Well continuous oil pipe operation process, and the row's of returning bridging plug fragment is object.Oil/gas Well is made up of lower drag reduction conical body 1, cylindrical body 2, upper drag reduction conical body 3, jointing 4, oval-shaped second nozzle 6 and the 3rd nozzle 7 and the first nozzle 5 with boring bridging plug debris cleaning tool.
Forward three of hydrojet be the 3rd nozzle 7 that angular distribution arranges, six of hydrojet are second nozzle 6 that angle Spiral distribution arranges backward, four of hydrojet are hexagon the first nozzle cage 5 that angular distribution is arranged backward, by different way, effective and reasonable arranged evenly, reach and rinse and discharge the optimized structure of fragment by nozzle bore and injection direction optimum organization.
According to Oil/gas Well hole condition and flushing discharge capacity needs, select different size the first nozzle 5, be installed in drag reduction conical body 3 waists, the angled nozzle cage to back upper place to hydrojet.Cylindrical body 2 is without nozzle, shiny surface design.Second nozzle 6 helical arrangement are distributed in lower drag reduction conical body 1.
Second nozzle 6 and the 3rd nozzle 7 are according to oval end face, the arc tubular nozzle of lower drag reduction conical body 1 architectural feature design.
As shown in the figure, lower drag reduction conical body 1 bottom be designed with three forward hydrojet, be the 3rd nozzle 7 that angular distribution is arranged, middle part has six of hydrojet to be backward the second nozzle 6 that angle Spiral distribution is arranged.Lower drag reduction conical body 1 top is connected with cylindrical body 2 bottoms, cylindrical body 2 tops are connected with upper drag reduction conical body 3 bottoms, upper drag reduction conical body 3 waists be designed with four backward hydrojet, be angular distribution arrange the hexagon nozzle cage that the first nozzle 5 is housed, upper drag reduction conical body 3 tops are connected with jointing 4.Whole cleaning tool is integral type, the replaceable size of the first nozzle 5.