CN106437570A - Drilling type continuous sand blasting device - Google Patents

Drilling type continuous sand blasting device Download PDF

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Publication number
CN106437570A
CN106437570A CN201611022535.4A CN201611022535A CN106437570A CN 106437570 A CN106437570 A CN 106437570A CN 201611022535 A CN201611022535 A CN 201611022535A CN 106437570 A CN106437570 A CN 106437570A
Authority
CN
China
Prior art keywords
sand
drill
double
drill bit
wall
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.)
Pending
Application number
CN201611022535.4A
Other languages
Chinese (zh)
Inventor
邓丽
王国华
秦大伟
谭军
董学成
黄燊
熊继有
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southwest Petroleum University
Original Assignee
Southwest Petroleum University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Southwest Petroleum University filed Critical Southwest Petroleum University
Priority to CN201611022535.4A priority Critical patent/CN106437570A/en
Publication of CN106437570A publication Critical patent/CN106437570A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/42Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/60Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/602Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/60Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/61Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/18Pipes provided with plural fluid passages
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor

Abstract

The invention provides a drilling type continuous sand blasting device, comprising a sand blasting drill bit, a dual-wall drilling pillar, a rotational sealing well head, a rotational driving device, a sand blasting fluid manifold, and a sand carrying fluid manifold; the sand blasting drill bit includes a drill bit body and an inner drill bit body; the rotational driving device drives the dual-wall drilling pillar to rotate so as to drive the sand blasting drill bit to rotate and cut the hardware sand pillar at the bottom; a high-pressure shocking cavity with a multi-curve cavity is formed between the inner wall of the lower end of the drill bit body and the outer wall of the internal drill bit; a part of sand flushing fluid in the high pressure shocking cavity can provide suction negative pressure through a high pressure jet flow generated from a backward jet flow nozzle; thus on the one hand, normal circulation sand carrying of a low pressure well can be guaranteed; on the other hand, the settled sand at the bottom is isolated from the well bottom, so as to benefit sand carrying; the other part of sand blasting fluid is sprayed from the drill bit nozzle, asymmetry jet flow is formed, thus it is good for making the strewing sand at the well bottom enter the sand carrying suction cavity and improving the sand carrying efficiency. The device can guarantee the safety of oil gas well while effectively complete the cleaning work of the hard sand pillar of the low-pressure oil well.

Description

Drilling type continuous sand flushing device
Technical field
The present invention relates to field of mechanical technique, more particularly, to a kind of drilling type continuous sand flushing device.
Background technology
Formation sand production is one of inevitable major issue in oil-gas field development production process, China central and east oil field by Long in recovery time, recovery percent of reserves is high, the factor such as serious reduction of reservoir pressure coefficient, and formation sand production is particularly acute.According to statistics, river The sand output well in Chinese oil field accounts for the 50% about of total recovery well number, and oil field is every year because the workover treatment number of times that formation sand production leads to accounts for always The 45%-50% of well workover time, considerably increases oil field production cost.Reservoir sand deposits formation sand post in the wellbore, floods payzone, Lead to yield reduction;Meanwhile, abrasion down-hole and surface production facilities, cause Oil/gas Well to damage;The borehole wall may be caused to collapse when serious Collapse and lead to Oil/gas Well to stop production.Therefore, during Oil/gas Well production development, the reservoir sand entering in pit shaft must be removed in time.
At present, the conventional sand removal technology in scene is broadly divided into two classes:(1) hydraulic sand washing, (just follows including conventional hydraulic sand washing Ring sand washing, inverse circular sand washing adapter, square impact backwash sand washing etc.), low-density gasification liquid sand washing, temporarily envelope agent hydraulic sand washing, jet flow negative pressure punching Sand etc.;(2) mechanical sand-picking, drags for sand including steel wire rope conveying-type, oil pipe conveying-type drags for sand etc..The key of hydraulic sand washing operation be Circulation is set up, thus reservoir sand is carried out well using sand cleaning fluid, but for central and east oil field low pressure well (pressure system in pit shaft Number is less than 1), circulation cannot be set up using conventional load fluid, load fluid directly leaks into stratum;Using low-density sand washing liquid or penetrate Although stream negative pressure sand washing can normal circulation, the hard sand post sand removal effect for serious consolidation is less obvious.Machinery drags for Sand technology is not required to the circulation of external working solution, will not polluted reservoir, simple to operate, but when shaft bottom sand setting consolidates and forms sand post, drag for Sand operation is often difficult successfully.
Knowable to above, effective method is not yet had to solve the hard sand post producing in low pressure oil gas well liquid loading at present Problem.
Content of the invention
It is an object of the invention to solving the defect that above-mentioned prior art exists, provide one kind be used for removing low pressure oil well hard The drilling type continuous sand flushing device of matter sand post.
A kind of drilling type continuous sand flushing device, including:Sand washing drill bit, double-walled drill string, rotatory sealing well head, rotation driving dress Put, sand cleaning fluid manifold, load fluid manifold;
Described sand washing drill bit includes:Body in drill body, drill bit;
In drill bit, the upper end of body is provided with drill bit nipple, and in drill bit, body is hollow circular cylinder structure, this hollow circular cylinder Epimere be load fluid on return passage, middle hypomere be load fluid suction chamber;
The upper end-face edge of drill body constitutes drill body joint, and the hypomere outside drill body circumferentially has cutting Rib, the bottom surface of drill body is provided with load fluid entrance, and load fluid entrance is connected with described load fluid suction chamber;Load fluid enters Mouthful with the dead in line of drill body;Formed between external wall in drill body hypomere inwall and drill bit and there is many curved surfaces chamber High pressure turbulence cavity, forms the drill bit ring with not isometrical annular space between external wall in drill body epimere inwall and drill bit Empty;High pressure turbulence cavity is connected with drill bit annular space;
In drill bit the hypomere of body be disposed with some to backward jet nozzle, the sole arrangement of drill body has several drill bits Nozzle;Described backward jet nozzle entrance is connected with high pressure turbulence cavity, and outlet is located in load fluid suction chamber;The entering of bit nozzle Mouth is connected with described high pressure turbulence cavity, and outlet is connected with the pit shaft outside sand washing drill bit;
Described double-walled drill string includes the double-wall drill pipe inner tube of double-wall drill pipe coupling, hollow structure;In described double-wall drill pipe Pipe inner passage composition center flow channels;The bottom of double-wall drill pipe inner tube is provided with double-wall drill pipe nipple, and described double-walled bores The outer wall of bar inner tube constitutes double-wall drill pipe annular space, the outlet of described double-wall drill pipe nipple and center mistake with the inwall of double-walled drill string Circulation road connects;
Double-walled drill string passes through that many double-wall drill pipes order is threaded to be formed, described double-wall drill pipe coupling and double-wall drill pipe Nipple is threadeded with drill body joint and drill bit nipple respectively;Double-wall drill pipe annular space is connected with drill bit annular space, double Wall drill pipe annulus are connected with sand cleaning fluid manifold, and drill bit annular space, double-wall drill pipe annular space and sand cleaning fluid manifold composition sand cleaning fluid enter well and lead to Road;Passage phase passage is returned, center flow channels are connected with load fluid manifold, on load fluid on center flow channels and load fluid That returns passage, center flow channels and load fluid manifold composition load fluid goes out well passage;
Rotatory sealing well head arranges on the ground, for the sealing of double-walled drill string is fixed on well head;Rotating driving device sets Put more than ground, for driving double-walled drill string and sand washing bit.
Further, drilling type continuous sand flushing device as above, described load fluid entrance is cone.
Further, drilling type continuous sand flushing device as above, afterwards described backward jet nozzle be arranged symmetrically, quantity For 2-3 pair, backward jet nozzle is 10 ° -30 ° with the angle of bit-body axis.
Further, drilling type continuous sand flushing device as above, described bit nozzle 112 assumes unsymmetrical arrangement, Quantity is 3-5.
Further, drilling type continuous sand flushing device as above, the equivalent diameter of described bit nozzle is less than backward The equivalent diameter of nozzle.
Further, drilling type continuous sand flushing device as above, described cutting rib is arranged in pairs, and quantity is 2-3 Right.
Compared with prior art, beneficial effects of the present invention are as follows:
(1) the rotation sand washing drill bit of the application, replaces conventional mechanical to drag for drag for abrasive cone or sand in sand and shovels it is achieved that drill bit exists Hard sand post in rotary cutting shaft bottom in the presence of the pressure of the drill, the reservoir sand of serious consolidation is changed into broken sand, loose sand, beneficial to sand cleaning fluid Take sand, improve sand removal efficiency;
(2) the backward jet that the backward jet nozzle of the application produces can produce suction, can effectively reduce Bottom hole pressure difference, on the one hand ensure that low pressure well normal circulation takes sand, shaft bottom sand setting on the other hand can be promoted to depart from shaft bottom, carry High sand washing efficiency;
(3) the high pressure turbulence cavity of the application have concussion backflow effect, sand cleaning fluid here produce whirlpool, vorticity disturbance with Impact walls interact, thus increased the energy that backward jet nozzle and bit nozzle export fluid, beneficial to sand washing with take sand.
Brief description
Fig. 1 is a kind of structural representation of present invention drilling type continuous sand flushing device;
Fig. 2 is a kind of structural representation of the sand washing drill bit of present invention drilling type continuous sand flushing device;
Fig. 3 is a kind of schematic three dimensional views of the sand washing drill bit of present invention drilling type continuous sand flushing device;
Fig. 4 is a kind of double-wall drill pipe structural representation of present invention drilling type continuous sand flushing device.
In figure:1st, sand washing drill bit, 2, pit shaft, 3, double-walled drill string, 4, ground, 5, rotatory sealing well head, 6, rotation driving dress Put, 7, sand cleaning fluid manifold, 8, load fluid manifold, 11, drill bit nipple, 12, body in drill bit, 13, drill body, 14, drill bit this Body joint, 15, drill bit annular space, 16, load fluid suction chamber, 17, return passage on load fluid, 18, high pressure turbulence cavity, 19, penetrate backward Flow nozzle, 110, cutting rib, 111, load fluid entrance, 112, bit nozzle, 31, double-wall drill pipe coupling, 32, double-wall drill pipe Nipple, 33, double-wall drill pipe annular space, 34, double-wall drill pipe inner tube, 35, center flow channels.
Specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below technical scheme in the present invention carry out clearly Chu, it is fully described by it is clear that described embodiment a part of embodiment that is the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work Embodiment, broadly falls into the scope of protection of the invention.
As Figure 1-Figure 4, the drillable continuous sand flushing device of the present invention, including sand washing drill bit 1, double-walled drill string 3, rotation Sealing wellhead 5, rotation driving fills 6, sand cleaning fluid manifold 7, load fluid manifold 8.
Sand washing drill bit 1 includes drill body 13, drill body joint 14, body 12 in drill bit, drill bit nipple 11, cuts the wing Rib 110, drill bit annular space 15, high pressure turbulence cavity 18, backward jet nozzle 19, bit nozzle 112, load fluid entrance 111, load fluid Suction chamber 16, load fluid returns passage 17.The hypomere in drill body 13 outside circumferentially has 2 to cutting rib 110;Drill bit Interior body 12 is hollow circular cylinder, and hollow circular cylinder epimere is to return passage 17 on load fluid, and hollow circular cylinder hypomere is inhaled for load fluid Enter chamber 16;Load fluid entrance 111 is the bottom surface that cone is located at drill body 13, connects with load fluid suction chamber 16, load fluid Entrance 111 and the dead in line of drill body 13.Drill bit annular space 15 is drill body 13 epimere inwall and body 12 outer wall in drill bit Between formed not isometrical annular space;Between high pressure turbulence cavity 18 is for body 12 outer wall in drill body 13 hypomere inwall and drill bit The many curved surfaces chamber being formed, drill bit annular space 15 is connected with high pressure turbulence cavity 18;In drill bit, the hypomere of body 12 is disposed with 3 to penetrating backward Flow nozzle 19, the axis of backward jet nozzle 19 and the axis of drill body 13 are in 30 ° of angles, the entrance of backward jet nozzle 19 Connect with high pressure turbulence cavity 18, the outlet of backward jet nozzle 19 is located in load fluid suction chamber 16, backward jet nozzle 19 Outlet is located in the same plane of load fluid suction chamber 16;The bottom surface unsymmetrical arrangement of drill body 13 has 5 bit nozzles 112, the entrance of bit nozzle 112 is connected with high pressure turbulence cavity 18, and the outlet of bit nozzle 112 is connected with pit shaft 2.
Described double-walled drill string 3 includes:Double-wall drill pipe coupling 31, double-wall drill pipe nipple 32, double-wall drill pipe annular space 33, double Wall drilling rod inner tube 34, center flow channels 35.Double-walled drill string 3 forms by many double-wall drill pipes are sequentially threaded, and double-walled bores The double-wall drill pipe coupling 31 of post 3 bottom and double-wall drill pipe nipple respectively with the drill body joint 14 of sand washing drill bit 1 and Drill bit nipple 11 is threadeded with 32 respectively;Double-wall drill pipe annular space 33 is connected with drill bit annular space 15, and double-walled drill string 3 is topmost Double-wall drill pipe annular space 33 is connected with sand cleaning fluid manifold 7, and drill bit annular space 15, double-wall drill pipe annular space 33 and sand cleaning fluid manifold 7 constitute punching Sand liquid enters well passage;The center flow channels 35 of double-wall drill pipe inner tube 34 are connected with returning passage 17 on the load fluid of drill body 13 Logical, the center flow channels 35 of double-walled drill string 3 the top double-wall drill pipe inner tube 34 are connected with load fluid manifold 8, on load fluid Return passage 17, center flow channels 35 go out well passage with load fluid manifold 8 composition load fluid.Rotatory sealing well head 5 is arranged on On ground 4, for ensureing to drag for sand job safety;Rotating driving device 6 is mainly used in operation process driving and entirely enters well casing Post rotates.
The course of work of low pressure Oil/gas Well hard sand post sand washing operation is carried out using this device and operation principle is as follows:
When carrying out sand washing operation, measure the top surface depth of hard sand post in pit shaft first, needs are determined according to this depth The radical of the double-wall drill pipe using, is then assembled into well casing post, enters assemble in well casing post lower going-into-well cylinder 2.Work as sand flushing drill During 1 contact shaft bottom hard sand post, start rotating driving device 6 and drive double-walled drill string 3 and sand washing drill bit 1 to rotate, sand washing drill bit 1 Start to cut shaft bottom hard sand post, make the reservoir sand seriously consolidating be changed into broken sand, loose sand;Pump into punching from sand cleaning fluid manifold 7 simultaneously Sand liquid.High pressure sand cleaning fluid enters the double-wall drill pipe annular space 33 of double-walled drill string 3 through sand cleaning fluid manifold 7, then passes through drill bit annular space 15 Enter high pressure turbulence cavity 18.The a part of ejection by backward jet nozzle 19 of high pressure sand cleaning fluid entering high pressure turbulence cavity 18 forms height Rapid fire stream, produces negative pressure in load fluid suction chamber 16, this negative pressure pass through load fluid entrance 111 to the sand cleaning fluid in pit shaft 2 and Broken sand is aspirated;Another part high pressure load fluid of high pressure turbulence cavity 18 is sprayed by bit nozzle 112 simultaneously, and is produced from agitation shaft bottom Raw broken sand, loose sand is so that shaft bottom sand setting, under the clear rock effect of sand cleaning fluid and the suction function of load fluid suction chamber 16, enters Passage 17 is returned on load fluid, and then recycles well along center flow channels 35 and load fluid manifold 8.Continuous with sand washing drill bit 1 Cutting shaft bottom hard sand post, reservoir sand carries and continuously goes out well sand cleaning fluid, and then completes low pressure Oil/gas Well hard sand post Sand removal process.
Finally it should be noted that:Above example only in order to technical scheme to be described, is not intended to limit;Although With reference to the foregoing embodiments the present invention is described in detail, it will be understood by those within the art that:It still may be used To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein some technical characteristics; And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and Scope.

Claims (6)

1. a kind of drilling type continuous sand flushing device is it is characterised in that include:Sand washing drill bit (1), double-walled drill string (3), rotatory sealing Well head (5), rotating driving device (6), sand cleaning fluid manifold (7), load fluid manifold (8);
Described sand washing drill bit (1) includes:Body (12) in drill body (13), drill bit;
In drill bit, the upper end of body (12) is provided with drill bit nipple (11), and in drill bit, body (12) is hollow circular cylinder structure, in this The epimere of hollow cylinder is to return passage (17) on load fluid, and middle hypomere is load fluid suction chamber (16);
The upper end-face edge of drill body (13) constitutes drill body joint (14), the hypomere circumferentially cloth outside drill body (13) It is equipped with cutting rib (110), the bottom surface of drill body (13) is provided with load fluid entrance (111), load fluid entrance (111) and institute State load fluid suction chamber (16) connection;Load fluid entrance (111) and the dead in line of drill body (13);Under drill body (13) Form the high pressure turbulence cavity (18) with many curved surfaces chamber between body (12) outer wall, on drill body (13) in section inwall and drill bit Form the drill bit annular space (15) with not isometrical annular space between body (12) outer wall in section inwall and drill bit;High pressure turbulence cavity (18) connect with drill bit annular space (15);
In drill bit the hypomere of body (12) be disposed with some to backward jet nozzle (19), drill body (13) if sole arrangement have Dry bit nozzle (112);Described backward jet nozzle (19) entrance is connected with high pressure turbulence cavity (18), and outlet is located at load fluid In suction chamber (16);The entrance of bit nozzle (112) is connected with described high pressure turbulence cavity (18), and outlet is with sand washing drill bit (1) outward Pit shaft (2) connection;
Described double-walled drill string (3) includes double-wall drill pipe coupling (31), the double-wall drill pipe inner tube (34) of hollow structure;Described double-walled Drilling rod inner tube (34) inner passage composition center flow channels (35);The bottom of double-wall drill pipe inner tube (34) is provided with double-wall drill pipe Nipple (32), the outer wall of described double-wall drill pipe inner tube (34) constitutes double-wall drill pipe annular space (33) with the inwall of double-walled drill string (3), The outlet of described double-wall drill pipe nipple (32) is connected with center flow channels (35);
Double-walled drill string (3) passes through that many double-wall drill pipes order is threaded to be formed, described double-wall drill pipe coupling (31) and double-walled Drilling rod nipple (32) is threadeded with drill body joint (14) and drill bit nipple (11) respectively;Double-wall drill pipe annular space (33) It is connected with drill bit annular space (15), double-wall drill pipe annular space (33) is connected with sand cleaning fluid manifold (7), drill bit annular space (15), double-walled bore Burr sky (33) and sand cleaning fluid manifold (7) constitute sand cleaning fluid and enter well passage;Passage is returned on center flow channels (35) and load fluid (17) phase passage, center flow channels (35) are connected with load fluid manifold (8), and load fluid returns passage (17), center excessively stream Passage (35) goes out well passage with load fluid manifold (8) composition load fluid;
Rotatory sealing well head (5) arranges on the ground, for double-walled drill string (3) sealing is fixed on well head;Rotating driving device (6) it is arranged on more than ground, for driving double-walled drill string (3) and sand washing drill bit (1) rotation.
2. drilling type continuous sand flushing device according to claim 1 is it is characterised in that described load fluid entrance (111) is Cone.
3. drilling type continuous sand flushing device according to claim 1 is it is characterised in that described backward jet nozzle (19) afterwards It is arranged symmetrically, quantity is 2-3 pair, backward jet nozzle (19) is 10 ° -30 ° with the angle of drill body (13) axis.
4. drilling type continuous sand flushing device according to claim 1 is it is characterised in that described bit nozzle (112) presents Unsymmetrical arrangement, quantity is 3-5.
5. drilling type continuous sand flushing device according to claim 1 it is characterised in that described bit nozzle (112) work as Amount diameter is less than the equivalent diameter of backward nozzle.
6. drilling type continuous sand flushing device according to claim 1 is it is characterised in that described cutting rib (110) is paired Arrangement, quantity is 2-3 pair.
CN201611022535.4A 2016-11-21 2016-11-21 Drilling type continuous sand blasting device Pending CN106437570A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611022535.4A CN106437570A (en) 2016-11-21 2016-11-21 Drilling type continuous sand blasting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611022535.4A CN106437570A (en) 2016-11-21 2016-11-21 Drilling type continuous sand blasting device

Publications (1)

Publication Number Publication Date
CN106437570A true CN106437570A (en) 2017-02-22

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108716375A (en) * 2018-07-01 2018-10-30 东北石油大学 Cyclone type reacting cycle well-flushing fishing device
CN111287679A (en) * 2020-04-08 2020-06-16 罗林峰 Underground sand removing equipment for coal bed gas exploitation
CN112610172A (en) * 2020-12-16 2021-04-06 广东石油化工学院 Jet type sand washing device
CN113153142A (en) * 2021-04-12 2021-07-23 山东省地勘局第二水文地质工程地质大队(山东省鲁北地质工程勘察院) Hard broken formation gas lift reverse circulation drilling anti-blocking tool in geological drilling

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CN104405292A (en) * 2014-11-03 2015-03-11 中国石油大学(北京) Double-wall drill pipe countercirculation well drilling fixed guide impeller type rotational flow and jet flow pump drill bit
CN105317379A (en) * 2014-06-26 2016-02-10 中石化石油工程地球物理有限公司胜利分公司 Convergence type reverse circulation hole bottom drill
CN206267815U (en) * 2016-11-21 2017-06-20 西南石油大学 Drilling type continuous sand flushing device

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Publication number Priority date Publication date Assignee Title
US20050103527A1 (en) * 2003-11-13 2005-05-19 Church Kris L. Dual wall drill string assembly
CN202073498U (en) * 2011-03-15 2011-12-14 中国石油大学(北京) Chambering type pressure-reduction acceleration drill bit
CN203531840U (en) * 2013-10-21 2014-04-09 成都利特能源技术有限公司 Vibration cementing tool
CN203685080U (en) * 2013-12-23 2014-07-02 阜新市石油工具厂 Negative-pressure rotation-flow sand washing device
CN105317379A (en) * 2014-06-26 2016-02-10 中石化石油工程地球物理有限公司胜利分公司 Convergence type reverse circulation hole bottom drill
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CN206267815U (en) * 2016-11-21 2017-06-20 西南石油大学 Drilling type continuous sand flushing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108716375A (en) * 2018-07-01 2018-10-30 东北石油大学 Cyclone type reacting cycle well-flushing fishing device
CN111287679A (en) * 2020-04-08 2020-06-16 罗林峰 Underground sand removing equipment for coal bed gas exploitation
CN112610172A (en) * 2020-12-16 2021-04-06 广东石油化工学院 Jet type sand washing device
CN113153142A (en) * 2021-04-12 2021-07-23 山东省地勘局第二水文地质工程地质大队(山东省鲁北地质工程勘察院) Hard broken formation gas lift reverse circulation drilling anti-blocking tool in geological drilling

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Application publication date: 20170222