CN117684921A - Coiled tubing shale reservoir deep penetration pulse jet drilling device and use method - Google Patents
Coiled tubing shale reservoir deep penetration pulse jet drilling device and use method Download PDFInfo
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- CN117684921A CN117684921A CN202410157344.7A CN202410157344A CN117684921A CN 117684921 A CN117684921 A CN 117684921A CN 202410157344 A CN202410157344 A CN 202410157344A CN 117684921 A CN117684921 A CN 117684921A
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- 238000005553 drilling Methods 0.000 title claims abstract description 39
- 230000035515 penetration Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009434 installation Methods 0.000 claims abstract description 34
- 238000001125 extrusion Methods 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims description 22
- 239000004576 sand Substances 0.000 claims description 11
- 238000004873 anchoring Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 238000005457 optimization Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 238000005056 compaction Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000003079 shale oil Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Abstract
The invention relates to the technical field of oil extraction engineering, in particular to a continuous oil pipe shale reservoir deep penetration pulse jet drilling device and a using method thereof. The invention has reasonable and compact structure, the first continuous oil pipe is put down, so that the reversing guide rail and the extrusion assembly are pushed to advance, after the extrusion assembly is put down to a preset depth, the extrusion assembly can fix the rivet slips and the lower outer cylinder in the sleeve, after the first continuous oil pipe is lifted up, the reversing guide rail drives the upper cone to move upwards, then the first continuous oil pipe is put down, the reversing pin slides into the lower long groove from the lower short groove of the groove type rotary guide rail, and the reversing guide rail rotates a certain angle under the action of the reversing pin, so that the lower end of the installation channel can be set in a plurality of directions, and perforation is conveniently carried out on the inner wall of the sleeve in a plurality of directions, thereby carrying out perforation operation on stratum.
Description
Technical Field
The invention relates to the technical field of oil extraction engineering, in particular to a coiled tubing shale reservoir deep penetration pulse jet drilling device and a using method thereof.
Background
With the continuous deep development of oil and gas exploration, the position of unconventional oil and gas resources in the energy field is more and more important, and shale oil and gas and compact oil and gas are important succession resources. Shale oil reservoir porosity is little, permeability is extremely low, in order to realize the high-efficient development of reservoir, needs to adopt artifical transformation mode to improve reservoir water conservancy diversion ability to improve the reservoir and reform transform the effect.
At present, a complex fracture network is formed through a large-displacement and large-sand mode aiming at the horizontal well volume fracturing process of the shale reservoir, the reservoir transformation purpose is realized, but the shale reservoir is limited by the single-hole liquid inlet amount, the penetrating capacity of the shale reservoir is limited, an effective diversion channel cannot be formed, and the reservoir building effect is not ideal.
The patent literature with the publication number of CN101158271A and the name of oil-water well oil layer fixed-point deep penetration horizontal drilling device discloses an oil-water well oil layer fixed-point deep penetration horizontal drilling device, which mainly solves the problems that two existing perforating devices have large ground investment, complex device structures and form compaction belts and damaged sleeves in near-wellbore zones in the construction process, and consists of a measurement and control system (I), a stepping system (II), a power system (III), a drilling gun system (IV), an anchoring system (V) and a circulating system (VI), wherein each system consists of a plurality of parts. The device adopts the mechatronic design, plays through power cable, carries out real-time supervision and control with the computer in the ground to the horizontal drilling machine in pit, can bore the horizontal hole of hole depth, aperture big, no compaction area in sleeve pipe, cement sheath and reservoir, eliminates the compaction area that conventional perforation caused, but this oil-water well oil reservoir fixed point deep penetration horizontal drilling device structure is comparatively complicated, and perforation cost is higher, can't perforate a plurality of sleeve pipe inner walls of coplanar position.
Patent document with publication number CN110984859a, entitled radial horizontal drilling and sand control completion tool and method, discloses a radial horizontal drilling and sand control completion tool and method, wherein the tools include radial horizontal drilling auxiliary pipe string, radial horizontal drilling tool string and sand control tool, the radial horizontal drilling auxiliary pipe string includes depth adjusting tool, special oil pipe combination, depth correcting tool, azimuth measuring auxiliary tool, axial anchoring tool, azimuth adjusting tool and drilling guiding tool connected in series, the radial horizontal drilling tool string includes logging cable, circulating fluid inlet tool, gravity sealing tool, circumferential anchoring tool, power motor, buckling joint, flexible drill pipe and milling bit tool connected in series, but the pipe string produced by the radial horizontal drilling and sand control completion tool cannot generate pulse jet, has limited penetrating capacity to shale reservoir layer, cannot form effective diversion channel, and the reservoir is not ideal.
Disclosure of Invention
The invention provides a continuous oil pipe shale reservoir deep penetration pulse jet drilling device and a using method thereof, which overcome the defects of the prior art, and can effectively solve the problems that the prior horizontal well volume fracturing process has limited penetration capacity on shale reservoir, cannot form an effective diversion channel and has an unsatisfactory reservoir formation effect.
One of the technical schemes of the invention is realized by the following measures: the utility model provides a coiled tubing shale reservoir deep penetration pulse jet drilling equipment, includes from top to bottom connects gradually together first coiled tubing, crossover sub, second coiled tubing and director, the director upper end is equipped with the lower extreme and extends to the installation passageway in director lower part outside, the director lower extreme is equipped with the anchoring device that can be fixed in the sleeve pipe inner wall after reciprocating movement, the anchoring device includes the switching-over guide rail, the switching-over pin, lower urceolus, the installation piece, rivet slips, upper cone and extrusion subassembly, director lower extreme and switching-over guide rail upper end fixed mounting together, switching-over guide rail lower extreme outside is equipped with the rotatory guide rail of recess, the urceolus is equipped with down in the cover of switching-over guide rail lower extreme outside, the inboard fixed mounting in lower urceolus upper portion has the switching-over pin, switching-over pin tip slidable mounting is in the rotatory guide rail of recess, the installation piece outside is installed in the lower urceolus upper end corresponding switching-over pin position and is installed in the installation piece outside, the extrusion subassembly that can offset with the sleeve pipe inner wall, the rivet outside in the switching-over guide rail upper portion outside is installed to the installation slip, the upper end outside can make outside the rivet outside after the fixed mounting outside of the upper cone of the lower slip.
The following are further optimizations and/or improvements to one of the above-described inventive solutions:
the mounting channel can comprise a first straight hole section, a second straight hole section and a horizontal section which are sequentially communicated from top to bottom, wherein the lower end of the first straight hole section and the upper end of the second straight hole section are in inclined transition, the lower end of the second straight hole section and the left end of the horizontal section are in arc transition, and the lower end of the second continuous oil pipe passes through the first straight hole section and the second straight hole section and is fixedly mounted with the left end of the pulse jet nozzle fixedly mounted on the inner side of the right end of the horizontal section.
The extrusion assembly can comprise a friction block, a compression spring, a lower joint and a fixed ring, wherein the inner side of the upper part of the lower outer cylinder is fixedly installed together with the outer side of the lower joint lower part sleeved on the outer side of the reversing guide rail, a limiting step is arranged on the inner side of the upper part of the lower joint, the fixed ring is installed between the inner side of the lower joint corresponding to the position of the limiting step and the outer side of the reversing guide rail, a reversing pin is fixedly installed together with the corresponding position of the fixed ring, the inner side of the upper joint corresponding to the position above the fixed ring is fixedly installed together with the outer side of the lower part of the installation block, a plurality of installation grooves with outwards-opened openings are uniformly distributed on the outer side of the installation block along the circumference at intervals, friction blocks with thin middle thickness and two sides are installed in each installation groove, a plurality of inwards-opened limiting grooves are formed in the middle part of the friction block at intervals, and the compression spring propped against the inner wall of the installation groove is installed in each limiting groove.
The upper end of the friction block can be positioned at the inner side of the lower end of the rivet slip, the lower end of the friction block is positioned at the inner side of the upper end of the lower joint, and a plurality of arc-shaped grooves with outward openings are formed in the outer side of the friction block at intervals.
The outer side of the lower end of the lower outer cylinder can be fixedly provided with a guide shoe.
The outer side of the lower end of the upper cone can be a conical surface with a large upper part and a small lower part.
The outer side of the lower end of the reversing guide rail can be fixedly provided with a safety nut sleeved on the inner side of the lower outer cylinder.
The second technical scheme of the invention is realized by the following measures: the application method of the continuous oil pipe shale reservoir deep penetration pulse jet drilling device comprises the following steps:
step one, a coiled tubing shale reservoir deep penetration pulse jet drilling device is lowered into the well, so that the lower end of an installation channel is located at a first preset depth;
step two, the extrusion assembly is propped against the inner wall of the sleeve, the first continuous oil pipe is moved upwards for a set distance, then the first continuous oil pipe is lowered, so that the reversing pin moves back and forth in the groove type rotary guide track and then drives the upper cone to move downwards, and the upper part of the rivet slip expands outwards and is propped against the inner wall of the sleeve after the upper cone moves downwards;
step three, the load change amplitude enters step four in a set interval when the first continuous oil pipe is lowered;
step four, injecting a first miscible fluid into the upper end of the first continuous oil pipe, and then perforating the casing;
step five, after the first miscible fluid is injected for a set time, if the pressure is reduced within a set range, entering a step six;
step six, perforating the stratum after injecting the second miscible fluid into the upper end of the first continuous oil pipe;
step seven, entering step eight after the perforation depth reaches a preset depth;
step eight, slowly lifting the first continuous oil pipe so that the lower end of the installation channel is positioned at a second preset depth, and then lowering the first continuous oil pipe again;
and step nine, repeating the step two to the step eight.
The following is a further optimization and/or improvement of the second technical scheme of the invention:
the sand ratio of the first mixed phase fluid is 10%, and the sand ratio of the second mixed phase fluid is 0.
The fifth step is as follows: the set time of the first mixed phase fluid injection is 10 to 15min, the pressure is reduced within the set range of 1 to 3MPa, and the step six is entered.
In the second step, the set distance for the upward movement of the first continuous oil pipe is 2.4 to 2.6 meters.
The setting interval in the third step is 1 to 1.5t.
In the eighth step, the speed of lifting the first continuous oil pipe is 2-3 m/min.
The invention has reasonable and compact structure, and the first continuous oil pipe is put down, so that the reversing guide rail and the extrusion assembly are pushed to advance, when the extrusion assembly is put down to a preset depth, the outer side of the extrusion assembly is propped against the inner wall of the sleeve, the extrusion assembly can fix the rivet slips and the lower outer cylinder in the sleeve, after the first continuous oil pipe is lifted up, the reversing guide rail drives the upper cone to move upwards, then the first continuous oil pipe is put down, the reversing pin slides into the lower long groove from the lower short groove of the groove type rotary guide rail, and the reversing guide rail rotates for a certain angle under the action of the reversing pin, so that the lower end of the installation channel can be set at a plurality of positions, the inner wall of the sleeve at a plurality of positions can be perforated conveniently, and the stratum is perforated.
Drawings
Fig. 1 is a schematic sectional front view of the present invention when used in one embodiment to a ninth embodiment.
Fig. 2 is an enlarged schematic view in front cross-section of the guide of fig. 1.
The codes in the drawings are respectively: 1 is a first continuous oil pipe, 2 is an adapter, 3 is a second continuous oil pipe, 4 is a guider, 5 is a reversing guide rail, 6 is a reversing pin, 7 is a lower outer cylinder, 8 is a mounting block, 9 is a rivet slip, 10 is an upper cone, 11 is a groove type rotary guide rail, 12 is a friction block, 13 is a compression spring, 14 is a lower adapter, 15 is a fixed ring, 16 is a limiting step, 17 is a mounting groove, 18 is an arc groove, 19 is a first straight hole section, 20 is a second straight hole section, 21 is a horizontal section, 22 is a pulse jet nozzle, 23 is a guide shoe, and 24 is a safety nut.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of the front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described below with reference to examples and figures:
embodiment one: as shown in fig. 1 and 2, the deep penetration pulse jet drilling device for the shale reservoir of the coiled tubing comprises a first coiled tubing 1, a conversion joint 2, a second coiled tubing 3 and a guider 4 which are sequentially connected together from top to bottom, wherein the upper end of the guider 4 is provided with a mounting channel of which the lower end extends to the outer side of the lower part of the guider 4, the lower end of the guider 4 is provided with an anchoring device capable of being fixed on the inner wall of a sleeve after reciprocating movement, the anchoring device comprises a reversing guide rail 5, a reversing pin 6, a lower outer cylinder 7, a mounting block 8, a rivet slip 9, an upper cone 10 and an extrusion assembly, the lower end of the guider 4 and the upper end of the reversing guide rail 5 are fixedly arranged together, a groove type rotary guide rail 11 is sleeved outside the lower outer cylinder 7, the inner side of the upper part of the lower outer cylinder 7 is fixedly provided with a reversing pin 6, the upper end of the lower outer cylinder 7 corresponding to the upper position of the reversing pin 6 is fixedly provided with a mounting block 8 on the outer side of the upper part of the reversing guide rail 5, the outer side of the mounting block 8 can be fixedly sleeved on the upper cone 10 of the upper end of the reversing guide rail 5 after the upper end of the reversing guide rail is fixedly sleeved with the rivet slip 9, and the lower end of the rivet slip 9 can be fixedly sleeved outside the upper end of the upper cone 9 of the reversing assembly can be fixedly sleeved outside the upper end of the reversing guide rail 9.
According to the demand, the diameter of first coiled tubing 1 is greater than the diameter of second coiled tubing 3, the first coiled tubing 1 of major diameter provides higher intensity and great discharge capacity, the second coiled tubing 3 of minor diameter has better pliability and intensity, director 4 is prior art, rivet slips 9 is prior art, there is the slips tooth outside rivet slips 9 upper end, grooved type rotatory guide track 11 is prior art, for example the bulletin number is CN211058759U name is the grooved type rotatory guide track in the blowout preventer in the positive and negative circulation, switching-over pin 6 tip is located short groove lower part inboard down.
In the use process, the first continuous oil pipe 1 is put down, thereby the reversing guide rail 5 and the extrusion assembly are pushed to advance in the sleeve, after the extrusion assembly is put down to a preset depth, because the outer side of the extrusion assembly is propped against the inner wall of the sleeve, the extrusion assembly can fix the rivet slips 9 and the lower outer cylinder 7 in the sleeve, after the first continuous oil pipe 1 is lifted up, the reversing guide rail 5 drives the upper cone 10 to move upwards, then the first continuous oil pipe 1 is put down, the reversing pin 6 slides into the lower long groove from the lower short groove of the groove type rotary guide rail 11, the reversing guide rail 5 rotates a certain angle under the action of the reversing pin 6, the lower end of the installation channel can be set at a plurality of orientations, the perforating operation is conveniently carried out on the inner wall of the sleeve at a plurality of orientations, and meanwhile, the reversing guide rail 5 can also drive the upper cone 10 to move downwards, so that the upper cone 10 extrudes the inner side of the upper part of the rivet slips 9, the upper part of the rivet slips 9 is outwards expanded, and the continuous perforating operation is conveniently carried out on the inner wall of the sleeve 4.
The continuous oil pipe shale reservoir deep penetration pulse jet drilling device can be further optimized or/and improved according to actual needs:
embodiment two: as an optimization of the above embodiment, as shown in fig. 1 and 2, the installation channel includes a first straight hole section 19, a second straight hole section 20 and a horizontal section 21 which are sequentially communicated from top to bottom, the lower end of the first straight hole section 19 and the upper end of the second straight hole section 20 are in inclined transition, the lower end of the second straight hole section 20 and the left end of the horizontal section 21 are in arc transition, and the lower end of the second coiled tubing 3 passes through the first straight hole section 19 and the second straight hole section 20 and is fixedly installed with the left end of a pulse jet nozzle 22 fixedly installed inside the right end of the horizontal section 21.
The pulsed jet spray head 22 is a pulsed high pressure spray head as is known in the art, as desired. In the use, through such setting, can reduce the resistance of fluid in the installation passageway, the setting of horizontal segment 21 can make the fluid pass through second coiled tubing 3 lower extreme, pulse jet nozzle 22 is just right the sleeve pipe inner wall behind, the installation of pulse jet nozzle 22, the velocity of flow after the fluid outflow installation passageway can be adjusted, be convenient for perforation on the sleeve pipe, pulse jet nozzle 22 changes the continuous liquid medium of first coiled tubing 1 high pressure pump into the intermittent flow that has pulsating pressure load, realize the broken rock of pulse jet, improve broken rock effect, produce great impact crack, carry out the deepening injection of manual perforation water conservancy diversion passageway, pulse jet nozzle 22 also can tightly suit in horizontal segment 21, in this way, after extrusion subassembly and sleeve pipe inner wall support tightly, put down first coiled tubing 1 can promote the perforation on second coiled tubing 3 and the pulse jet nozzle 22 pass the sleeve pipe and get into the stratum, realize that the limit breaks the limit and go deep into the stratum, can form the manual water conservancy diversion passageway that has certain length, aperture in shale reservoir.
Embodiment III: as shown in fig. 1 and 2, the extrusion assembly includes a friction block 12, a compression spring 13, a lower joint 14 and a fixing ring 15, the inner side of the upper portion of the lower outer cylinder 7 is fixedly mounted with the outer side of the lower portion of the lower joint 14 sleeved on the outer side of the reversing guide rail 5, a limit step 16 is arranged on the inner side of the upper portion of the lower joint 14, the fixing ring 15 is mounted between the inner side of the lower joint 14 corresponding to the position of the limit step 16 and the outer side of the reversing guide rail 5, the reversing pin 6 is fixedly mounted with the fixing ring 15, the inner side of the upper joint corresponding to the position above the fixing ring 15 is fixedly mounted with the outer side of the lower portion of the mounting block 8, a plurality of mounting grooves 17 with outward openings are uniformly distributed on the outer side of the mounting block 8 along the circumference, a friction block 12 with thin middle thickness and two sides are mounted in each mounting groove 17, a plurality of inwards opened limit grooves are formed in the middle of the friction block 12, and the compression spring 13 propped against the inner wall of the mounting groove 17 is mounted in each limit groove.
In the use, setting up of spacing step 16 can play spacing effect to solid fixed ring 15, through setting up friction disc 12 and mounting groove 17, the dismouting of compression spring 13 of being convenient for, the dismouting of friction disc 12 of being convenient for is convenient for according to sheathed tube specification change friction disc 12's size, also can change compression spring 13's specification and make friction disc 12 can offset with the sleeve pipe inner wall of multiple specification, increase application scope.
Embodiment four: as shown in fig. 1 and 2, the upper end of the friction block 12 is located inside the lower end of the rivet slip 9, the lower end of the friction block 12 is located inside the upper end of the lower joint 14, and a plurality of arc-shaped grooves 18 with outward openings are formed in the upper and lower sides of the outer side of the friction block 12 at intervals.
In the use, through such setting, the dismouting of the clutch blocks 12 of being convenient for, rivet slips 9 lower extreme, lower clutch 14 upper end can play limiting displacement to clutch blocks 12 both ends for clutch blocks 12 can radially remove in mounting groove 17, and arc recess 18 is corresponding with the spacing groove as required, can make the clutch blocks 12 outside tightly with the casing inner wall offset like this, can fix on the casing inner wall.
Fifth embodiment: as shown in fig. 1 and 2, the outer side of the lower end of the lower outer cylinder 7 is fixedly provided with a guide shoe 23, the outer side of the lower end of the upper cone 10 is a conical surface with a large upper part and a small lower part, and the outer side of the lower end of the reversing guide rail 5 is fixedly provided with a safety nut 24 sleeved on the inner side of the lower outer cylinder 7.
In the use, the setting of guide shoe 23 can play direction and righting effect, can also make every friction block 12 contact with the sleeve pipe inner wall, guide second coiled tubing 3 carry pulse jet nozzle 22 in the direction of perpendicular shale layer reason, be convenient for strike and produce artifical perforation water conservancy diversion passageway, the conical surface that big-end-up was down is in the lower extreme outside of upper cone 10, the conical surface of upper cone 10 can strut rivet slips 9 upper portion like this after the lower cone 10 moves down, make the upper portion outside of rivet slips 9 support tightly on the sleeve pipe inner wall, can thereby fix director 4, be convenient for follow-up perforation operation, the recess formula rotation of reversing guide rail 5 is rotatory to be convenient for the at least one lower long groove lower extreme of reversing guide rail 11 extends to reversing guide rail 5 lower extreme, safety nut 24 can be convenient for the dismouting of reversing pin 6.
Example six: as an optimization of the above embodiment, as shown in fig. 1 and 2, the method for using the coiled tubing shale reservoir deep penetration pulse jet drilling device comprises the following steps:
step one, a coiled tubing shale reservoir deep penetration pulse jet drilling device is lowered into the well, so that the lower end of an installation channel is located at a first preset depth;
step two, the extrusion assembly is propped against the inner wall of the sleeve, the first continuous oil pipe 1 is moved upwards for a set distance, then the first continuous oil pipe 1 is lowered, the reversing pin 6 is driven to move downwards after reciprocating in the groove type rotary guide track 11, the upper cone 10 is driven to expand outwards after moving downwards, and the upper part of the rivet slip 9 is propped against the inner wall of the sleeve;
step three, the load change amplitude enters step four in a set interval when the first continuous oil pipe 1 is lowered;
step four, injecting a first miscible fluid into the upper end of the first continuous oil pipe 1, and then perforating the casing;
step five, after the first miscible fluid is injected for a set time, if the pressure is reduced within a set range, entering a step six;
step six, perforating the stratum after injecting the second miscible fluid into the upper end of the first continuous oil pipe 1;
step seven, entering step eight after the perforation depth reaches a preset depth;
step eight, slowly lifting the first continuous oil pipe 1 so that the lower end of the installation channel is positioned at a second preset depth, and then lowering the first continuous oil pipe 1 again;
and step nine, repeating the step two to the step eight.
When the drilling device is used, the second step and the eighth step can be repeated for a plurality of times, the reversing pin 6 slides into the lower long groove from the lower short groove of the groove type rotary guide rail 11 to reciprocate for a plurality of times, so that the lower end of the installation channel corresponds to the target position of the sleeve, the reversing pin 6 slides into the lower long groove from the lower short groove of the groove type rotary guide rail 11, the reversing guide rail 5 rotates for a certain angle under the action of the reversing pin 6, so that the lower end of the installation channel can be set in a plurality of directions, the inner wall of the sleeve in a plurality of directions is conveniently perforated, the stratum is perforated, the influence of the inner wall of the sleeve on the extrusion assembly after the first continuous oil pipe 1 is put into the sleeve can be avoided, the perforating position of the inner wall of the sleeve can be accurately positioned, the working efficiency is improved, and the step nine can aim at the layer section of the next stage which needs to be modified by the pulse jet nozzle 22, so that the drilling operation of infinite cluster deep penetrating pulse jet is realized.
Thus, a large-length artificial perforation diversion channel perpendicular to the horizontal reservoir of shale is formed in the shale reservoir, and meanwhile, a plurality of artificial perforation diversion channels can be formed in the shale reservoir by dragging the first continuous oil pipe 1.
The coiled tubing shale reservoir deep penetration pulse jet drilling device and the using method can be further optimized or/and improved according to actual needs:
embodiment seven: as an optimization of the above embodiment, the sand ratio of the first mixed phase fluid was 10% and the sand ratio of the second mixed phase fluid was 0. Thus, the perforation efficiency of the inner wall of the sleeve can be improved, the stratum can be perforated, and the stratum is prevented from being polluted after the stratum is perforated.
Example eight: as an optimization of the above embodiment, step five is: the set time of the first mixed phase fluid injection is 10 to 15min, the pressure is reduced within the set range of 1 to 3MPa, and the step six is entered. Therefore, the inner wall of the casing can be ensured to be shot, and subsequent perforating operation on the stratum is facilitated.
Example nine: as an optimization of the above embodiment, as shown in fig. 1 and 2, in the second step, the set distance for the upward movement of the first continuous oil pipe 1 is 2.4 to 2.6 meters, so that the friction block 12 is guaranteed to abut against the inner wall of the casing, so that the reversing pin 6 can move from the short lower groove of the groove type rotary guiding rail 11 to the long lower groove, the set interval in the third step is 1 to 1.5t, so that whether the upper end of the rivet slips 9 is opened can be verified, whether the anchoring device is fixed on the inner wall of the casing can be judged, the subsequent perforation operation is facilitated, in the eighth step, the speed for lifting the first continuous oil pipe 1 is 2 to 3m/min, so that the friction block 12 is prevented from being damaged when the first continuous oil pipe 1 is lifted, and the failure rate is reduced.
The technical characteristics form the embodiment of the invention, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (10)
1. The utility model provides a coiled tubing shale reservoir deep penetration pulse jet drilling equipment, its characterized in that includes from top to bottom connects gradually together first coiled tubing, crossover sub, second coiled tubing and director, the director upper end is equipped with the lower extreme and extends to the installation passageway in director lower part outside, the director lower extreme is equipped with the anchoring device that can be fixed in the sleeve pipe inner wall after reciprocating movement, the anchoring device includes the switching-over guide rail, the switching-over pin, lower urceolus, the installation piece, rivet slips, upper cone and extrusion subassembly, director lower extreme and switching-over guide rail upper end fixed mounting together, switching-over guide rail lower extreme outside is equipped with grooved rotation guide track, switching-over guide rail lower extreme outside cover has down urceolus, lower urceolus upper portion inboard fixed mounting has the switching-over pin, switching-over pin tip slidable mounting is in grooved rotation guide track, the lower urceolus upper end fixed mounting that corresponds switching-over pin top position has the cover in switching-over guide rail upper portion outside, install the rivet outside the switching-over guide rail outside can be with the extrusion subassembly of sleeve pipe inner wall counterbalance, installation piece upper end is equipped with the rivet outside the switching-over guide rail upper portion outside, the upper end can make the outside the slip cover to be fixed outside after the switching-over movement outside.
2. The deep penetration pulse jet drilling device for the shale reservoir of the continuous oil pipe according to claim 1, wherein the installation channel comprises a first straight hole section, a second straight hole section and a horizontal section which are sequentially communicated from top to bottom, the lower end of the first straight hole section and the upper end of the second straight hole section are in inclined transition, the lower end of the second straight hole section and the left end of the horizontal section are in arc transition, and the lower end of the second continuous oil pipe is fixedly installed with the left end of a pulse jet nozzle fixedly installed on the inner side of the right end of the horizontal section after passing through the first straight hole section and the second straight hole section.
3. The continuous oil pipe shale reservoir deep penetration pulse jet drilling device according to claim 1 or 2, wherein the extrusion assembly comprises a friction block, a compression spring, a lower joint and a fixed ring, the inner side of the upper part of the lower outer cylinder is fixedly arranged on the outer side of the lower joint sleeved on the outer side of the reversing guide rail, a limit step is arranged on the inner side of the upper part of the lower joint, the fixed ring is arranged between the inner side of the lower joint corresponding to the limit step position and the outer side of the reversing guide rail, a reversing pin is fixedly arranged on the corresponding position of the fixed ring, the inner side of the upper joint corresponding to the position above the fixed ring is fixedly arranged on the outer side of the lower part of the installation block, a plurality of installation grooves with outwards opened openings are uniformly distributed on the outer side of the installation block along the circumference at intervals, the friction blocks with thin middle thick sides are arranged in each installation groove, a plurality of limit grooves with inwards opened sides are arranged on the middle part of the friction block, and the compression spring propped against the inner wall of the installation groove is arranged in each limit groove.
4. The deep penetration pulse jet drilling device for the shale reservoir of the continuous oil pipe according to claim 3, wherein the upper end of the friction block is positioned on the inner side of the lower end of the rivet slip, the lower end of the friction block is positioned on the inner side of the upper end of the lower joint, and a plurality of arc-shaped grooves with outward openings are formed in the outer side of the friction block at intervals.
5. The deep penetration pulse jet drilling device for the shale reservoir of the continuous oil pipe according to claim 1, 2 or 4, wherein a guide shoe is fixedly arranged outside the lower end of the lower outer cylinder; or/and the outer side of the lower end of the upper cone is a conical surface with a large upper part and a small lower part; or/and the outer side of the lower end of the reversing guide rail is fixedly provided with a safety nut sleeved on the inner side of the lower outer cylinder.
6. The deep penetration pulse jet drilling device for the shale reservoir of the continuous oil pipe according to claim 3, wherein a guide shoe is fixedly arranged outside the lower end of the lower outer cylinder; or/and the outer side of the lower end of the upper cone is a conical surface with a large upper part and a small lower part; or/and the outer side of the lower end of the reversing guide rail is fixedly provided with a safety nut sleeved on the inner side of the lower outer cylinder.
7. A method of using the coiled tubing shale reservoir deep penetration pulse jet drilling apparatus of any of claims 1 to 6, comprising the steps of:
step one, a coiled tubing shale reservoir deep penetration pulse jet drilling device is lowered into the well, so that the lower end of an installation channel is located at a first preset depth;
step two, the extrusion assembly is propped against the inner wall of the sleeve, the first continuous oil pipe is moved upwards for a set distance, then the first continuous oil pipe is lowered, so that the reversing pin moves back and forth in the groove type rotary guide track and then drives the upper cone to move downwards, and the upper part of the rivet slip expands outwards and is propped against the inner wall of the sleeve after the upper cone moves downwards;
step three, the load change amplitude enters step four in a set interval when the first continuous oil pipe is lowered;
step four, injecting a first miscible fluid into the upper end of the first continuous oil pipe, and then perforating the casing;
step five, after the first miscible fluid is injected for a set time, if the pressure is reduced within a set range, entering a step six;
step six, perforating the stratum after injecting the second miscible fluid into the upper end of the first continuous oil pipe;
step seven, entering step eight after the perforation depth reaches a preset depth;
step eight, slowly lifting the first continuous oil pipe so that the lower end of the installation channel is positioned at a second preset depth, and then lowering the first continuous oil pipe again;
and step nine, repeating the step two to the step eight.
8. The method of using a coiled tubing shale reservoir deep penetration pulse jet drilling apparatus as claimed in claim 7, wherein the sand ratio of the first miscible fluid is 10% and the sand ratio of the second miscible fluid is 0.
9. The method of using a coiled tubing shale reservoir deep penetration pulse jet drilling apparatus as claimed in claim 7 or 8, wherein step five is: the set time of the first mixed phase fluid injection is 10 to 15min, the pressure is reduced within the set range of 1 to 3MPa, and the step six is entered.
10. The method of using a coiled tubing shale reservoir deep penetration pulse jet drilling apparatus as claimed in claim 7 or 8, wherein in step two, the set distance for the upward movement of the first coiled tubing is 2.4 to 2.6 meters; or/and, setting the interval in the third step to be 1 to 1.5t; or/and, in the step eight, the speed of lifting the first continuous oil pipe is 2-3 m/min.
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| CN202410157344.7A CN117684921B (en) | 2024-02-04 | Coiled tubing shale reservoir deep penetration pulse jet drilling device and use method |
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