CN103696755A - Insulation pup joint used for electromagnetic wireless measurement while drilling and manufacturing method for insulation pup joint - Google Patents
Insulation pup joint used for electromagnetic wireless measurement while drilling and manufacturing method for insulation pup joint Download PDFInfo
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- CN103696755A CN103696755A CN201310303374.6A CN201310303374A CN103696755A CN 103696755 A CN103696755 A CN 103696755A CN 201310303374 A CN201310303374 A CN 201310303374A CN 103696755 A CN103696755 A CN 103696755A
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Abstract
The invention discloses an insulation pup joint used for electromagnetic wireless measurement while drilling and a manufacturing method for the insulation pup joint, and is used for solving the technical problem that the insulation reliability of an insulation pup joint manufactured by adopting a traditional method is poor. The technical scheme is that the insulation pup joint consists of a middle section and two pup joints; the two pup joints are connected with both ends of the middle section through threads; the middle section and two pup joints connection interface placed insulation gasket; after the insulation pup joint is assembled, an inside liner is prepared on the inner cylindrical surface of the insulation pup joint, and an insulation wearing layer is prepared on the outer cylindrical surface of the insulation pup joint; the inside liner and the insulation wearing layer are respectively distributed on the inner cylindrical surface and the outer cylindrical surface of the whole insulation pup joint. As the threads are protected by adopting a mode that an inner insulation layer and an outer insulation layer cover threaded seams, the phenomenon that insulation is poor due to the fact that water seeps into the threads during a using process is avoided, and the insulation reliability of the insulation pup joint is improved. Tested by a 1000V megameter, the insulation resistance between the two pup joints is 500-1000 megohm.
Description
Technical field
The present invention relates to a kind of insulating short section, particularly relate to a kind of electromagnetic wireless measurement while drilling insulating short section.Also relate to the preparation method of insulating short section for this electromagnetic wireless measurement while drilling.
Background technology
Electromagnetic wireless measurement while drilling is to utilize electromagnetic wave to carry out down-hole TT&C system to communicate by letter with ground base station, realizes the track detection of drill bit and control and down-hole survey data in the real-time processing of ground based processor.Insulating short section is the key that wireless drilling measurer carries out radio communication, and it is by the two poles of the earth that make the drilling rod insulation at upper and lower two ends serve as respectively wireless signal transmission antenna, thereby carries out transmitting and receiving of wireless signal.The insulating properties of insulating short section are directly connected to the quality of wireless signal, so insulating short section need to keep good insulating properties under the complex working condition of down-hole.The wearing and tearing that the short circuit that simultaneously insulate also will be responsible for the transmission of the pressure of the drill and bear the borehole wall, so also will have higher mechanical property and abrasion resistance properties.The relevant technology of preparing of external insulating short section is comparative maturity, but technology is unexposed.Domestic insulating short section mainly adopts in the mode of metal tube connecting portion painting insulating layer coating to be prepared, and insulating short section intensity can match in excellence or beauty with common drilling rod, but insulating reliability and abrasion resistance properties and external product still have gap.
Document " notice of authorization number is the Chinese utility model patent of CN202225229U " discloses ore deposit, a kind of ground probing insulating short section and preparation method thereof; insulating short section is by pipe nipple body and adopt the protection joint that is threaded in two ends to form; middle pipe nipple body surfaces externally and internally and end face be coated ceramic coating all; and at the mixed material of its external surface subsectin bottler diamond and ebonite, strengthen its abrasion resistance.Pottery is fragile material on the one hand, and in assembling and use procedure, the pottery of threaded portion is easy to come off because colliding with and scratching; There is no on the other hand waterproof measure, in use procedure, threaded joints divides easy water leaking-in to divide.Two kinds of problems all can cause defective insulation to cause insulating short section to lose efficacy.Therefore,, although the mechanical property of insulating short section prepared by the method and abrasion resistance properties are all better, insulating reliability is poor.
summary of the invention
In order to overcome the poor deficiency of existing insulating short section insulating reliability, the invention provides a kind of electromagnetic wireless measurement while drilling insulating short section.This insulating short section is comprised of middle node and two pipe nipples, two pipe nipples are threaded connection the two ends at middle node, the connecting interface of middle node and two pipe nipples is placed insulating washer, after insulating short section assembling, inner liner is prepared on the face of cylinder within it, at its external cylindrical surface preparation insulation wearing layer, inner liner and insulation wearing layer are distributed in respectively the inside and outside face of cylinder of whole insulating short section.All threaded portions of middle node and two pipe nipples carry out differential arc oxidation after aluminizing, make its surface there is ceramic insulating layer, the screw thread on this basis middle node being connected with two pipe nipples soaks moulds insulating polymeric material, can improve the insulating reliability of insulating short section.
The present invention also provides the preparation method of this electromagnetic wireless measurement while drilling with insulating short section.
The technical solution adopted for the present invention to solve the technical problems is: a kind of electromagnetic wireless measurement while drilling insulating short section, comprise middle node 1, the first pipe nipple 2 and the second pipe nipple 3, and the two ends of middle node 1 are the hollow pipe fittings of truncated cone-shaped structure, there is screw thread on the limit, slope of round platform.One end of the first pipe nipple 2 and the second pipe nipple 3 is corresponding structure with the two ends of middle node 1 respectively, by screw thread, is connected with middle node 1; The free end of the first pipe nipple 2 and the second pipe nipple 3 is the helicitic textures that cooperatively interact, the first insulating washer 4 is placed at the connecting interface minor diameter place that is characterized in described middle node 1 and the first pipe nipple 2 and the second pipe nipple 3, and the second insulating washer 5 is placed at connecting interface major diameter place.Inner liner 6 and insulation wearing layer 7 are distributed in respectively the inside and outside face of cylinder of whole insulating short section.The screw thread of middle node 1, the first pipe nipple 2 and the second pipe nipple 3 mates with the screw thread of standard drilling rod.
The material of described the first insulating washer 4 and the second insulating washer 5 is polytetrafluoroethylene (PTFE).
A preparation method for insulating short section for above-mentioned electromagnetic wireless measurement while drilling, is characterized in comprising the following steps:
Step 1, the processing of employing non-magnetic material middle node 1, the first pipe nipple 2 and the second pipe nipple 3, middle node 1 and the screw thread of the first pipe nipple 2 and the second pipe nipple 3 and the Screw Thread Fit Clearance 0.25-0.30mm of standard drilling rod.
Step 2, to the surface of the inside and outside surface of middle node 1 and middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 connecting threads eliminate rust, sandblast and cleaning pretreatment.
Step 3, the aluminium lamination to the process external surface of pretreated middle node 1 and the plated surface 0.2mm thickness of middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 connecting threads, be then transformed into dielectric ceramic layer by differential arc oxidation by aluminium coated.
Step 4, at dielectric ceramic layer, soak the plastic layer of moulding 0.1mm thickness outward.At the inner surface through pretreated middle node 1, prepare plastics inside floor 6.
Step 5, middle node 1, the first pipe nipple 2 and the second pipe nipple 3 are assembled together, adopt the insulaion resistance between two pipe nipples of 1000V megger test, if insulaion resistance >=500 megaohm, carries out next process, what do not meet insulating requirements prepares insulating layer again.
Step 6, outside the dielectric ceramic layer of insulating short section outer wall, polyethylene layered coated insulating adhesive and abrasive material, the THICKNESS CONTROL of every layer of abrasive material is at 0.2-0.3mm.
The non-magnetic material of described middle node 1, the first pipe nipple 2 and the second pipe nipple 3 is any of nonmagnetic steel, high-strength copper alloy or titanium alloy.
Described middle node 1, the first pipe nipple 2 and the connecting thread of the second pipe nipple 3 and the Screw Thread Fit Clearance 0.25-0.30mm of standard drilling rod.
Described plastics are any of polyethylene, polypropylene, rigid polyvinyl chloride, chlorinated polyvinyl chloride or polytetrafluoroethylene (PTFE).
Described abrasive material be quartz sand, schmigel, diamond dust or cubic boron nitride any or appoint several.
The invention has the beneficial effects as follows: insulating short section is comprised of middle node and two pipe nipples, two pipe nipples are threaded connection the two ends at middle node, the connecting interface of middle node and two pipe nipples is placed insulating washer, after insulating short section assembling, inner liner is prepared on the face of cylinder within it, at its external cylindrical surface preparation insulation wearing layer, inner liner and insulation wearing layer are distributed in respectively the inside and outside face of cylinder of whole insulating short section.All threaded portions of middle node and two pipe nipples carry out differential arc oxidation after aluminizing, and make its surface have the insulation wearing layer of pottery, and the screw thread on this basis middle node being connected with two pipe nipples soaks moulds insulating polymeric material.Because the mode that adopts ceramic insulation wearing layer to combine with polymeric dielectric layer improves the insulating properties of insulating short section, polymeric dielectric layer has played the effect of water-tight to connecting portion as overcoat, and the pottery that effectively prevents threaded portion in assembling and use procedure is because colliding with and scratching the failure of insulation problem that comes off and cause.In adopting, the mode double thread of external insulation layer covering screw thread seam is protected, and avoids in screw thread, seeping water and causing defective insulation in use procedure, has improved the insulating reliability of insulating short section.Insulaion resistance between two pipe nipples of 1000V megger test, insulaion resistance is 500～1000 megaohms.
Below in conjunction with drawings and Examples, the present invention is elaborated.
Accompanying drawing explanation
Fig. 1 is the structural representation of insulating short section for electromagnetic wireless measurement while drilling of the present invention.
In figure, 1-middle node; 2-the first pipe nipple; 3-the second pipe nipple; 4-the first insulating washer; 5-the second insulating washer; 6-inner liner; The 7-wearing layer that insulate.
The specific embodiment
Following examples are with reference to Fig. 1.
Embodiment 1.Electromagnetic wireless measurement while drilling of the present invention comprises middle node 1, the first pipe nipple 2 and the second pipe nipple 3 with insulating short section.The two ends of middle node 1 are the hollow pipe fittings of truncated cone-shaped structure, and there is screw thread on the limit, slope of round platform.One end of the first pipe nipple 2 and the second pipe nipple 3 is corresponding structure with the two ends of middle node 1 respectively, by screw thread, is connected with middle node 1.The first insulating washer 4 is placed at the connecting interface minor diameter place of middle node 1 and the first pipe nipple 2 and the second pipe nipple 3, and the second insulating washer 5 is placed at connecting interface major diameter place.The free end of the first pipe nipple 2 and the second pipe nipple 3 is the helicitic textures that cooperatively interact.Inner liner and insulation wearing layer are distributed in respectively the inside and outside face of cylinder of whole insulating short section.Middle node is that two ends are processed with externally threaded hollow pipe fitting, and the first pipe nipple 2 is all female hollow pipe fittings of two ends, and the second pipe nipple 3 is hollow pipe fittings, and there is internal thread the one end being connected with middle node 1, and the other end is free end, and free end has external screw thread.Middle node 1, the first pipe nipple 2 and the second pipe nipple 3 all adopt the nonmagnetic steel of mechanical property excellence or high-strength copper alloy or titanium alloy to process, the screw thread of middle node, the first pipe nipple 2 and the second pipe nipple 3 mates with the screw thread of standard drilling rod, connecting thread between the two adds the Screw Thread Fit Clearance 0.25-0.30mm guaranteeing man-hour with standard drilling rod, and double thread rounding.The material of the first insulating washer 4 and the second insulating washer 5 is polytetrafluoroethylene (PTFE).
Embodiment 2.
1) adopt nonmagnetic steel processing middle node 1, the first pipe nipple 2 and the second pipe nipple 3, the matching thread of middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 adds the Screw Thread Fit Clearance 0.25-0.30mm all guaranteeing man-hour with standard drilling rod.
2) to the surface of the inside and outside surface of middle node 1 and middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 connecting threads eliminate rust, the surface preparation such as sandblast and cleaning.
3) to the aluminium lamination through the external surface of pretreated middle node 1 and the plated surface 0.2mm thickness of middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 connecting threads, then by differential arc oxidation, aluminium coated is transformed into dielectric ceramic layer.
4) at the inner surface through pretreated middle node 1, and the polyethylene of moulding 0.1mm thickness is soaked on the surface of treated dielectric ceramic layer external surface and middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 connecting threads.
5) middle node 1, the first pipe nipple 2 and the second pipe nipple 3 are assembled together, adopt the insulaion resistance between two pipe nipples of 1000V megger test, if insulaion resistance >=500 megaohm is carried out next process, what do not meet insulating requirements prepares insulating layer again.
6) layered coated insulating adhesive and 100 order diamond dust outside the dielectric ceramic layer of insulating short section outer wall, polyethylene, the THICKNESS CONTROL of every layer of diamond dust is in 0.25mm left and right, the integral thickness 2mm of insulation wearing layer.
7) finished product detection: the insulating short section preparing is carried out to the detection of final insulating properties, utilize the insulaion resistance between two pipe nipples of 1000V megger test, insulaion resistance >=500 megaohm is qualified insulating short section finished product.
Embodiment 3.
1) adopt high-strength copper alloy processing middle node 1, the first pipe nipple 2 and the second pipe nipple 3, the matching thread of middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 adds the Screw Thread Fit Clearance 0.25-0.30mm all guaranteeing man-hour with standard drilling rod.
2) to the surface of the inside and outside surface of middle node 1 and middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 connecting threads eliminate rust, the surface preparation such as sandblast and cleaning.
3) to the aluminium lamination through the external surface of pretreated middle node 1 and the plated surface 0.2mm thickness of middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 connecting threads, then by differential arc oxidation, aluminium coated is transformed into dielectric ceramic layer.
4) at the inner surface through pretreated middle node 1, and the polypropylene of moulding 0.1mm thickness is soaked on the surface of treated dielectric ceramic layer external surface and middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 connecting threads.
5) middle node 1, the first pipe nipple 2 and the second pipe nipple 3 are assembled together, adopt the insulaion resistance between two pipe nipples of 1000V megger test, if insulaion resistance >=500 megaohm is carried out next process, what do not meet insulating requirements prepares insulating layer again.
6) layered coated insulating adhesive and 80 order schmigels outside the dielectric ceramic layer of insulating short section outer wall, polyethylene, the THICKNESS CONTROL of every layer of schmigel is in 0.25mm left and right, the integral thickness 2mm of insulation wearing layer.
7) finished product detection: the insulating short section preparing is carried out to the detection of final insulating properties, utilize the insulaion resistance between two pipe nipples of 1000V megger test, insulaion resistance >=500 megaohm is qualified insulating short section finished product.
Embodiment 4.
1) adopt titanium alloy processing middle node 1, the first pipe nipple 2 and the second pipe nipple 3, the matching thread of middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 adds the Screw Thread Fit Clearance 0.25-0.30mm all guaranteeing man-hour with standard drilling rod.
2) to the surface of the inside and outside surface of middle node 1 and middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 connecting threads eliminate rust, the surface preparation such as sandblast and cleaning.
3) to the aluminium lamination through the external surface of pretreated middle node 1 and the plated surface 0.2mm thickness of middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 connecting threads, then by differential arc oxidation, aluminium coated is transformed into dielectric ceramic layer.
4) at the inner surface through pretreated middle node 1, and rigid polyvinyl chloride or chlorinated polyvinyl chloride or the polytetrafluoroethylene (PTFE) of moulding 0.1mm thickness soaked on the surface of treated dielectric ceramic layer external surface and middle node 1 and the first pipe nipple 2 and the second pipe nipple 3 connecting threads.
5) middle node 1, the first pipe nipple 2 and the second pipe nipple 3 are assembled together, adopt the insulaion resistance between two pipe nipples of 1000V megger test, if insulaion resistance >=500 megaohm is carried out next process, what do not meet insulating requirements prepares insulating layer again.
6) layered coated insulating adhesive and 80 order quartz sands, cubic boron nitride and diamond dust outside the dielectric ceramic layer of insulating short section outer wall, polyethylene, the THICKNESS CONTROL of every layer of quartz sand, cubic boron nitride and diamond dust is in about 0.25mm, the integral thickness 2mm of insulation wearing layer.
7) finished product detection: the insulating short section preparing is carried out to the detection of final insulating properties, utilize the insulaion resistance between two pipe nipples of 1000V megger test, insulaion resistance >=500 megaohm is qualified insulating short section finished product.
Adopt the insulaion resistance between two pipe nipples of 1000V megger test, the test data of insulaion resistance is in Table 1.
Table 1 sample performance test data
As can be seen from Table 1, more than the insulaion resistance of three groups of insulating short sections has all reached 1000M Ω, show that insulating short section prepared by the present invention has high insulating properties, has met the requirement of electromagnetic measurement while drilling to insulating short section insulating properties completely.
Claims (7)
1. an electromagnetic wireless measurement while drilling insulating short section, comprises middle node (1), the first pipe nipple (2) and the second pipe nipple (3), and the two ends of middle node (1) are the hollow pipe fittings of truncated cone-shaped structure, and there is screw thread on the limit, slope of round platform; One end of the first pipe nipple (2) and the second pipe nipple (3) is corresponding structure with the two ends of middle node (1) respectively, by screw thread, is connected with middle node (1); The free end of the first pipe nipple (2) and the second pipe nipple (3) is the helicitic texture cooperatively interacting, the first insulating washer (4) is placed at the connecting interface minor diameter place that it is characterized in that described middle node (1) and the first pipe nipple (2) and the second pipe nipple (3), and the second insulating washer (5) is placed at connecting interface major diameter place; Inner liner (6) and insulation wearing layer (7) are distributed in respectively the inside and outside face of cylinder of whole insulating short section; The screw thread of middle node (1), the first pipe nipple (2) and the second pipe nipple (3) mates with the screw thread of standard drilling rod.
2. electromagnetic wireless measurement while drilling insulating short section according to claim 1, is characterized in that: the material of described the first insulating washer (4) and the second insulating washer (5) is polytetrafluoroethylene (PTFE).
3. the preparation method of insulating short section for electromagnetic wireless measurement while drilling described in claim 1, is characterized in that comprising the following steps:
Step 1, the processing of employing non-magnetic material middle node (1), the first pipe nipple (2) and the second pipe nipple (3), middle node (1) and the first pipe nipple (2) and the screw thread of the second pipe nipple (3) and the Screw Thread Fit Clearance 0.25-0.30mm of standard drilling rod;
Step 2, to the inside and outside surface of middle node (1) and middle node (1) and the surface of the first pipe nipple (2) and the second pipe nipple (3) connecting thread eliminate rust, sandblast and cleaning pretreatment;
Step 3, the aluminium lamination to the plated surface 0.2mm thickness of the external surface through pretreated middle node (1) and middle node (1) and the first pipe nipple (2) and the second pipe nipple (3) connecting thread, be then transformed into dielectric ceramic layer by differential arc oxidation by aluminium coated;
Step 4, at dielectric ceramic layer, soak the plastic layer of moulding 0.1mm thickness outward; Through the inner surface of pretreated middle node (1), preparing plastics inside floor (6);
Step 5, middle node (1), the first pipe nipple (2) and the second pipe nipple (3) are assembled together, adopt the insulaion resistance between two pipe nipples of 1000V megger test, if insulaion resistance >=500 megaohm, carries out next process, what do not meet insulating requirements prepares insulating layer again;
Step 6, outside the dielectric ceramic layer of insulating short section outer wall, polyethylene layered coated insulating adhesive and abrasive material, the THICKNESS CONTROL of every layer of abrasive material is at 0.2-0.3mm.
4. the preparation method of insulating short section for electromagnetic wireless measurement while drilling according to claim 3, is characterized in that: the non-magnetic material of described middle node (1), the first pipe nipple (2) and the second pipe nipple (3) is any of nonmagnetic steel, high-strength copper alloy or titanium alloy.
5. the preparation method with insulating short section according to the electromagnetic wireless measurement while drilling described in claim 3 or 4, is characterized in that: described middle node (1), the first pipe nipple (2) and the connecting thread of the second pipe nipple (3) and the Screw Thread Fit Clearance 0.25-0.30mm of standard drilling rod.
6. the preparation method of insulating short section for electromagnetic wireless measurement while drilling according to claim 3, is characterized in that: described plastics are any of polyethylene, polypropylene, rigid polyvinyl chloride, chlorinated polyvinyl chloride or polytetrafluoroethylene (PTFE).
7. the preparation method of insulating short section for electromagnetic wireless measurement while drilling according to claim 3, is characterized in that: described abrasive material be quartz sand, schmigel, diamond dust or cubic boron nitride any or appoint several.
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| CN201310303374.6A CN103696755B (en) | 2013-07-18 | 2013-07-18 | Insulation pup joint used for electromagnetic wireless measurement while drilling and manufacturing method for insulation pup joint |
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| CN201310303374.6A CN103696755B (en) | 2013-07-18 | 2013-07-18 | Insulation pup joint used for electromagnetic wireless measurement while drilling and manufacturing method for insulation pup joint |
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| CN103696755B CN103696755B (en) | 2017-05-24 |
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| CN104863573A (en) * | 2015-06-01 | 2015-08-26 | 中国地质大学（武汉） | Insulation short joint and manufacturing method thereof |
| CN107546487A (en) * | 2016-06-29 | 2018-01-05 | 中国石油化工股份有限公司 | A kind of high-strength insulating antenna coupling assembly |
| CN114754056A (en) * | 2021-04-22 | 2022-07-15 | 苏州希瑞格机械科技有限公司 | Hydraulic bolt and surface modification composite treatment process thereof |
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| CN114754056A (en) * | 2021-04-22 | 2022-07-15 | 苏州希瑞格机械科技有限公司 | Hydraulic bolt and surface modification composite treatment process thereof |
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| CN103696755B (en) | 2017-05-24 |
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