Horizontal well perforation device
Technical field
The invention belongs to oil exploration and development fields, be specifically related to a kind of horizontal well perforation device, be mainly used in downhole perforation operation.
Background technology
Fracturing fluid horizontal well open hole completion fracturing technology was more and more coming into one's own aspect exploitation low-permeability oil gas field in recent years.
Conventional jet perforating device generally adopts spiral pattern, after perforation, at wellbore casing inner surface, form a plurality of eyelets of the uniform arrangement of helical form, during pressure break, in most cases crack can only be along the Directional Extension perpendicular to natural minimum principal stress, fracture strike can not be controlled, very likely the section of causing with section between intersecting of fracturing fracture gang up, affect fracturing effect.
Oil field at home is all used the instrument of external service company at present, has received good effect.But the instrument of external service company is expensive, this technical tool of large-scale promotion application is all less feasible by introducing at home, and reason is:
1, domestic oily well yield is on the low side, as application foreign technology does not have benefit to say substantially;
2, external instrument adopts order form to produce, and Lead Time is long, can not meet the rhythm of production requirement of domestic drilling completion.
In addition, in using the process of foreign technology, we find that its perforating system tends to occur not opening or open incomplete phenomenon in construction, after even if this perforating system is opened, the pressured liquid fracturing technique of splitting, when pressure break is carried out in stratum, often because the fracture pressure on stratum is higher, and causes the not obvious accident that even occurs of construction effect again, meanwhile, to the kit of all technologies, require all harsher.
Summary of the invention
In order to solve the problem in background technology, it is low that the present invention proposes a kind of cost of production, and perforating effect is good, the horizontal well perforation device of convenient operation.
Concrete technical scheme of the present invention is:
A device, comprises and carry to play assembly and play the sliding sleeve ignition module that assembly is connected with carrying;
Described sliding sleeve ignition module comprises slide bushing assembly and ignition module;
Described slide bushing assembly comprises outer sleeve, sliding sleeve, pressure break ball; Described outer sleeve is sleeved on sliding sleeve outside; Described sliding sleeve inside offers fracturing fluid passage; On the inwall of described sliding sleeve, be provided with boss; Described pressure break ball rests on boss;
The detonator that described ignition module comprises striker and rests on striker end; Described fracturing fluid passage is connected with striker by sliding sleeve outer wall.
Above-mentioned slide bushing assembly also comprises shear pin; Described shear pin one end is arranged on the sidewall of outer sleeve, and the other end is arranged on the outer wall of sliding sleeve.
The quantity of above-mentioned shear pin is a plurality of and is along the circumferential direction uniformly distributed.
Within above-mentioned year, play assembly and comprise the detonating fuse that carries body, multi-openings bullet and connect multi-openings bullet; The inside of described year body is cavity, and multi-openings bullet is installed on outer wall; Described sliding sleeve is sleeved on and carries on body outer wall; Described cavity is connected with fracturing fluid passage; Described detonating fuse is connected with detonator.
Above-mentioned horizontal well perforation device also comprises the first joint being connected with year body and the second joint being connected with outer sleeve.
The invention has the beneficial effects as follows:
1, within of the present invention year, on body, be uniformly distributed multi-openings bullet, can in pit shaft cross section, form multi-openings duct, duct can form effectively and stitch mesh gap perpendicular to fracturing fluid horizontal well pit shaft after linking up, and is convenient to the operation of follow-up pressure break hydraulic pressure pressure break.
2, the present invention adopts the combination of detonator, striker and detonating fuse to ignite perforating bullet, has guaranteed the safety and reliability of down-hole ignition perforating bullet.
Accompanying drawing explanation
Fig. 1 is structure chart of the present invention.
Fig. 2 is M of the present invention place structure chart.
1-carries and plays assembly, 11-carries body, 111-cavity, 12-perforating bullet, 13-detonating fuse, 2-sliding sleeve ignition module, 21-slide bushing assembly, 211-outer sleeve, 212-sliding sleeve, 2121-fracturing fluid passage, 2122-boss, 213-pressure break ball, 214-shear pin, 22-ignition module, 221-striker, 222-detonator, 3-the second joint, 4-the first joint.
The specific embodiment
In order to adapt to the underground work requirement of domestic oil well, reduce the waste that import external product causes, the present invention proposes a kind of horizontal well perforation device.
Below in conjunction with accompanying drawing 1 and 2 pairs of structures of the present invention of accompanying drawing, be described:
This device comprises and carry to play assembly 1 and play the sliding sleeve ignition module 2 that assembly 1 is connected with carrying;
Wherein, sliding sleeve ignition module 2 comprises slide bushing assembly 21 and the ignition module 22 being connected with slide bushing assembly 21;
Wherein slide bushing assembly 21 comprises outer sleeve 211, sliding sleeve 212, pressure break ball 213; Outer sleeve 211 is sleeved on sliding sleeve 212 outsides; Sliding sleeve 212 inside offer fracturing fluid passage 2121; On the inwall of sliding sleeve 212, be provided with boss 2122; Described pressure break ball 213 rests on boss 2122;
Furtherly, the detonator 222 that ignition module 22 comprises striker 221 and is arranged on striker 221 ends; Described fracturing fluid passage 2121 is connected with striker 221 by sliding sleeve 212.
Especially, this slide bushing assembly 21 also comprises shear pin 214; Shear pin 214 one end are arranged on the sidewall of outer sleeve 211, and the other end is arranged on the outer wall of sliding sleeve 212 (quantity of shear pin 214 is a plurality of and is along the circumferential direction uniformly distributed), prevents under off working state, and sliding sleeve 212 and outer sleeve 211 relatively move.
Furtherly, carry and play the detonating fuse 13 that assembly 1 comprises a year body 11, multi-openings bullet 12 and connection multi-openings bullet 12; The inside of described year body 11 is cavity 111, and multi-openings bullet 12 is installed on outer wall; Sliding sleeve 212 is sleeved on and carries on body 11 outer walls; Described cavity 1111 is connected with fracturing fluid passage 2121; Described detonating fuse 13 is connected with detonator 222.
In order to ensure down-hole, can form effectively and stitch mesh gap perpendicular to fracturing fluid horizontal well pit shaft, therefore, the present invention is along being distributed with multi-openings bullet 12 along circumferencial direction on some cross sections of year body 11 axis.(being generally to install 6).
Especially, needs in order to ensure underground work, this device has also been installed the first joint 4 at year bullet assembly 1 front end, and connected the second joint 3 in slide bushing assembly 2 rear ends, and be connected with other equipment with this device, realize plurality of devices and synchronously descended well operations (conventionally, in order to save material, reduce costs while manufacturing this device, the second joint 3 and outer sleeve 211 are produced according to the mode of one).
Next, the concrete using method of this device is described:
First, by the assembly relation shown in Fig. 1, assemble this device, then this device and other instrument are connected into tubing string, put into down together well;
Then, utilize pump according to the pressure of setting, fracturing fluid is injected into fracturing fluid passage from carrying the cavity of body, under the effect of hydraulic pressure, promote the moving sliding sleeve of pressure break spherical zone and cut off shear pin, ignition module is communicated with fracturing fluid passage connection;
Finally, under of the fracturing fluid effect, the striker impact detonator on ignition module, detonator is lighted detonating fuse, ignites all perforating bullets under the guiding of detonating fuse, thereby in down-hole, has formed a plurality of ducts, completes perforating job.