CN2900758Y - Open hole cave making tool for oil-gas well - Google Patents

Open hole cave making tool for oil-gas well Download PDF

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Publication number
CN2900758Y
CN2900758Y CN 200620007271 CN200620007271U CN2900758Y CN 2900758 Y CN2900758 Y CN 2900758Y CN 200620007271 CN200620007271 CN 200620007271 CN 200620007271 U CN200620007271 U CN 200620007271U CN 2900758 Y CN2900758 Y CN 2900758Y
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CN
China
Prior art keywords
mandrel
piston
knife bar
gas well
oil gas
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.)
Expired - Fee Related
Application number
CN 200620007271
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Chinese (zh)
Inventor
周俊然
王益山
蒋海涛
娄文祥
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.)
INST OF DRILLING-WELL TECHNOLOGY HUABEI PETROLEUM ADMINISTRATION
Original Assignee
INST OF DRILLING-WELL TECHNOLOGY HUABEI PETROLEUM ADMINISTRATION
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Publication date
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Priority to CN 200620007271 priority Critical patent/CN2900758Y/en
Application granted granted Critical
Publication of CN2900758Y publication Critical patent/CN2900758Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a burrowing device of oil gas well bare hole. A body with a stepped slotted hole is connected with the bottom end of a top connector, a piston is arranged on a slotted hole of the top body, and a shaft is arranged in the slotted hole of the bottom. A drilling fluid hole is arranged on the piston bottom of the body wall, an injector in the center of the piston is connected with a hole in the center of the shaft. A centrifugal injector is arranged on the bottom of the shaft center hole, and an axle-pin at the bottom of the body is connected with the top end of a knife bar. The bottom of the shaft is connected with one end of the connecting bar according to the axle-pin, and the bottom of the knife bar is connected with the other end of the connecting bar according to the axle-pin. Hard metal is welded on the surface of the knife bar and the connecting bar. The utility model has the advantages that well jig burrowing is achieved by the device, structure of opening and reclaiming is simple, safe and reliable. The construct craft is simple, and cost of the oil gas well bare jig burrowing is reduced largely.

Description

Oil gas well bore hole cave making tool
Technical field
The present invention relates to petroleum gas and coal bed gas drilling tool field.Be particularly related to a kind of oil gas well bore hole cave making tool.
Background technology
Bore hole cave technique functions comes from the coal-bed gas exploitation process of US West's san juan basin.In the coal-bed gas exploitation process of this area, for the coal seam is communicated with to greatest extent with well, in order to remove the pollution of near wellbore zone, in order to increase the well effective radius, in 1984, in research, bore hole cave technology has been proposed to the well stimulation of coal gas layer, and by the abrasive jet technology erosion is carried out in the shallow-layer coal seam at the scene, realized the bore hole cave first.Practice for many years makes bore hole cave technology be greatly developed in the area, San Juan, becomes a technology of most critical in this area's coal-bed gas exploitation.The cave technical development of coal bed gas well bore hole is comparatively ripe.Because technology barriers cause domestic relevant technical development backward relatively.In addition, in the lower oil-gas reservoir of the recovery ratio exploitation, owing to do not improve the supporting technology of effectively gathering, the oil gas very low scientific research task that need capture that is still of efficient of gathering at present.Therefore, research, exploitation bore hole cave technology and instrument improve the key technology that poor efficiency oil-gas reservoir and coal bed gas well development efficiency become China's oil, natural gas and cbm development.
At present, in drilling process, enlarge borehole diameter, generally take reamer.As the Chinese patent notification number is 2544085, and patent name is a down-hole major diameter reamer patent.A kind of exactly instrument that adopts mechanical hole reaming and the jetting method of combining to carry out reaming.Its structure is that broad is fixed on the main body by bearing pin, is installed in piston and intersubjective spring can promote piston reset, and plug is housed on main body, in the broad end PPC composite sheet is housed.In main body, be provided with fluid passage, one group of one-level high pressure nozzle is housed in the passage lower end, one group of secondary high pressure nozzle is housed, realize the jetting reaming at the broad front end.Being installed in piston below the broad promotes broad and opens.Be installed in piston and intersubjective spring and promote piston reset realization minimizing reaming moment of torsion.There is the PDC composite sheet can carry out the scraping borehole wall at the broad front end.Advantage reduces the reaming moment of torsion, guarantees the rule of reaming.Because this well reamer reaming process is from top to bottom, reaming efficient is low; The aperture is little, and the structure of reamer is not suitable for oil gas well bore hole yet and makes the cave.
Summary of the invention
The purpose of this utility model is that a kind of oil gas well bore hole cave making tool will be provided, and can produce the cave of a diameter at the 600-2500 millimeter in pit shaft bore hole section; Utilizing drilling liquid pressure to promote knife bar opens; Not influence instrument passed through wellbore casing after knife bar was regained.Realize improving oil, natural gas or coal bed gas well bore hole and make cave efficient.
Oil gas well bore hole cave making tool structure is made up of top connection, main body, piston, connecting rod and knife bar, and there is drill rod thread, the top connection lower end main body that is threaded top connection upper end.The stairstepping cylindrical hole is arranged in the main body.In the cylindrical hole of main body top piston is arranged; Lower cylindrical has mandrel in the hole.The drilling fluid manhole appendix is arranged on the lower part of piston main wall.There is piston nozzle at the piston center, and the mandrel center is porose, and piston nozzle is communicated with the mandrel centre bore.There is radial nozzles mandrel centre bore lower end.Mandrel is connected with piston, and mandrel can adopt with piston and be threaded.Also can be processed into parts for simplifying processing mandrel and piston.The main body lower end has pivot pin to connect the knife bar upper end.The mandrel lower end adopts pivot pin to link connecting rod one end.The knife bar lower end is connected by bearing pin with the other end of connecting rod.Form triangle between mandrel, knife bar and the connecting rod like this.Under piston promoted, mandrel made progress or is movable down, and drivening rod and knife bar motion strut knife bar.Knife bar and connecting rod external surface are welded with carbide alloy.
In order to adapt to the needs of making the cave, the external diameter of main body is between the 110-216 millimeter, and length is between the 600-1200 millimeter; Piston diameter is between the 100-200 millimeter; Outside diameter of mandrel is between the 30-80 millimeter.
For making piston have enough thrust to promote mandrel, the internal diameter of piston nozzle is the 8-25 millimeter.
Make the cave diameter for guaranteeing that oil gas well bore hole cave making tool has to strengthen under the sufficient intensity situation, the maximum angle of knife bar and mandrel is less than 90 degree.The maximum angle of knife bar and mandrel is exactly a knife bar when fully opening, the angle between knife bar lower plane and the mandrel center line.
The beneficial effect of oil gas well bore hole cave making tool is: can finish oil, natural gas or coal bed gas well bore hole and make cave work.And have following characteristics:
Oil gas well bore hole cave making tool in well, remove easily, reliable.Instrument is not opened or is regained back knife bar Outside Dimensions and is not more than the main body external diameter, and the instrument that can guarantee is smoothly by the upper strata sleeve pipe.
2. oil gas well bore hole cave making tool is opened with retraction mechanism simple, safe and reliable.Opening of instrument is that the pressure drop of leaning on drilling liquid flow to produce when throttling arrangement acts on the piston, forms descending thrust, promotes knife bar by connecting rod and opens; It then is after the termination of pumping of ground that knife bar draws in, carries drill string and cave making tool on directly, by the downward thrust drivening rod of the borehole wall to knife bar, and promotes piston stroking upward, thereby knife bar is drawn in.
3. simple, the safety of oil gas well bore hole cave making tool construction technology.Making the cave process is from bottom to top, and the cutter of rotation does not produce the repetition smear metal below fractured rock, improves and makes cave efficient.The whole cave process and the conventional drilling Job Operations process indifference made of this cave making tool do not have special requirement, is convenient to promote, and can greatly reduce and make the cave cost.
Description of drawings
Accompanying drawing 1 is the generalized section of the utility model oil gas well bore hole cave making tool.It is embodiment 1 structural representation.
Accompanying drawing 2 is schematic diagrames of the utility model user mode, promptly makes the generalized section in cave in well.
Among the figure, 1. top connection, 2. main body, 3. piston nozzle, 4. piston, 5. drilling fluid is imported and exported, 6. mandrel, 7. knife bar pin, 8. knife bar, 9. mandrel nozzle, 10. mandrel pin, 11. connecting rods, 12. carbide alloy, 13. link pins, 14. drill strings, 15. stratum.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments.
Embodiment: consult accompanying drawing 1.A main body (2) external diameter is 214 millimeters oil gas well bore hole cave making tools, and there is drill rod thread top connection (1) upper end, jointed rod post during use.Top connection (1) the lower end main body (2) that is threaded, the external diameter of main body is 214 millimeters, length is 1200 millimeters.Main body has shoulder hole in (2), and upper hole is a piston rod, in piston (4) is arranged, 145 millimeters of piston (4) diameters; Mandrel (6) is arranged, mandrel (6) and the as a whole parts that process of piston (4) in the bottom hole.It is 10 millimeters drilling fluid manhole appendix (5) that 3 diameters are arranged on sub-body (2) wall of piston (4), and piston (4) is when moving up and down, and drilling fluid passes in and out from the hole.The intracardiac piston nozzle (3) that is fixed with in the piston (4).73 millimeters of mandrel (6) external diameters, 30 millimeters of mandrel (6) centre bores, 850 millimeters of length.Piston nozzle (3) is communicated with mandrel (6) centre bore.There are 2 radial nozzles (9) mandrel (6) centre bore lower end.Main body (2) lower end has the groove of setting-in knife bar (8).Main body (2) lower end adopts the knife bar pin (7) of 20 millimeters of diameters to connect knife bar (8) upper end.Mandrel (6) lower end adopts mandrel pin (10) to link connecting rod (11) one ends, and knife bar (8) lower end is connected by link pin (13) with the other end of connecting rod (11).Knife bar (8) is 70 degree with the maximum angle of mandrel (6).Knife bar (8) adopts shop welder's skill with connecting rod (11) external surface, is welded with the carbide alloy (12) of one deck 6-25 millimeters thick.
Operating principle: consult accompanying drawing 2.The top connection (1) of oil gas well bore hole cave making tool is connected drill string (14) lower end, and this instrument is sent into the open hole well intraocular.Ground slush pump starting, pumping circulation mud.Circulating mud produces pressure reduction when flowing through nozzle (3), it is descending that this differential pressure action is gone up promotion mandrel (6) at piston (4).Mandrel (6) promotes knife bar (8) and outwards opens by the transfer function of connecting rod (11).Rotary drill column (14), a whole set of oil gas well bore hole cave making tool rotates under the drive of drill string (14), knife bar (8) cuts borehole wall stratum (15) with the carbide alloy (12) of connecting rod (11) external surface, and up to producing the cave that needs diameter, promptly knife bar (8) struts maximum angle.At this moment, in the time of rotary drill column (14), carry drill string (14) on progressively, oil gas well bore hole cave making tool on the stratum (15) produce cave with certain diameter and certain altitude, reach the purpose that improves oil, natural gas or coal-bed gas exploitation efficient.

Claims (7)

1, a kind of oil gas well bore hole cave making tool, formed by top connection (1), main body (2), piston (4), mandrel (6), knife bar (8) and connecting rod (11), there is drill rod thread top connection (1) upper end, top connection (1) the lower end main body (2) that is threaded, it is characterized in that: main body has shoulder hole in (2), in the cylindrical hole of main body (2) top piston (4) is arranged; Mandrel (6) is arranged in the bottom hole, on sub-body (2) wall of piston (4) drilling fluid manhole appendix (5) is arranged, there is piston nozzle (3) at piston (4) center, mandrel (6) has centre bore, piston nozzle (3) is communicated with mandrel (6) centre bore, there is radially mandrel nozzle (9) mandrel (6) centre bore lower end, mandrel (6) is connected with piston (4), main body (2) lower end adopts knife bar pin (7) to connect knife bar (8) upper end, mandrel (6) lower end adopts mandrel pin (10) to link connecting rod (11) one ends, knife bar (8) lower end is connected by pitman shaft (13) with the other end of connecting rod (11), and knife bar (8) is welded with carbide alloy (12) with connecting rod (11) external surface.
2, oil gas well bore hole cave making tool according to claim 1, it is characterized in that: main body (2) lower end has the groove of setting-in knife bar (8).
3, oil gas well bore hole cave making tool according to claim 1 is characterized in that: mandrel (6) adopts with piston (4) and is threaded.
4, oil gas well bore hole cave making tool according to claim 1 is characterized in that: mandrel (6) and the as a whole parts of piston (4).
5, oil gas well bore hole cave making tool according to claim 1, it is characterized in that: the external diameter of main body (2) is between the 110-216 millimeter, and length is between the 600-1200 millimeter; Piston (4) diameter is between the 100-200 millimeter; Mandrel (6) external diameter is between the 30-80 millimeter.
6, according to claim 1,2,3,4 or 5 described oil gas well bore hole cave making tools, it is characterized in that: the internal diameter of piston nozzle (3) is the 8-25 millimeter.
7, according to claim 1,2,3,4 or 5 described oil gas well bore hole cave making tools, it is characterized in that: knife bar (8) is spent less than 90 with the maximum angle of mandrel (6).
CN 200620007271 2006-03-03 2006-03-03 Open hole cave making tool for oil-gas well Expired - Fee Related CN2900758Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200620007271 CN2900758Y (en) 2006-03-03 2006-03-03 Open hole cave making tool for oil-gas well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200620007271 CN2900758Y (en) 2006-03-03 2006-03-03 Open hole cave making tool for oil-gas well

Publications (1)

Publication Number Publication Date
CN2900758Y true CN2900758Y (en) 2007-05-16

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Application Number Title Priority Date Filing Date
CN 200620007271 Expired - Fee Related CN2900758Y (en) 2006-03-03 2006-03-03 Open hole cave making tool for oil-gas well

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CN (1) CN2900758Y (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102947032A (en) * 2010-05-07 2013-02-27 奥贝里克斯控股有限公司 Undercutting tool
CN105735897A (en) * 2014-12-12 2016-07-06 中国石油大学(华东) Hydraulic power three-stage unfolding type coal bed gas cave manufacturing tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102947032A (en) * 2010-05-07 2013-02-27 奥贝里克斯控股有限公司 Undercutting tool
CN105735897A (en) * 2014-12-12 2016-07-06 中国石油大学(华东) Hydraulic power three-stage unfolding type coal bed gas cave manufacturing tool

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20070516

Termination date: 20120303

C17 Cessation of patent right