Roller Cone Bit Operating Procedus.
- Pre-Deployment Inspection
1) Kuongorora Kwekuona uye Zvinyorwa:
- Kuyera drill bit dhayamita.
- Tarisa uone kukuvadzwa pane zvakasungwa zvinongedzo.
- Ita shuwa kuti mazino uye zvisimbiso zvakamira.
-Ona kuti ma roller cones haarovererwe.
- Ongorora kune makatsemuka kana porosity kukanganisa mune welding seams.
2) Kuiswa kweNozzle:
- Ita shuwa kuchena kwenozzle uye imba panguva yekuisa. Hammering inorambidzwa zvachose kudzivirira kukuvadza muromo uye kuvhara zvindori.
- Bit Handling
1) Shandisa zvakakodzeradrill bitzvibatanidza uye maturusi ekubata kudzivirira kukuvara kune shinda, nozzles, uye bit body.
2) Dzivirira midziyo kubva pakuwira mutsime panguva yekubata.
3) Isa thread lubricant.
4) Tevedza yakakurudzirwa torque paramita panguva yekuungana:
- 17 1/2" bit: Roller Cone: 46.1—54.2 KN·m; PDC: 65.5—71.9 KN·m.
- 12 1/4" bit: Roller Cone: 37.9—43.3 KN·m; PDC: 50.3—57.5 KN·m.
-8 1/2" zvishoma: Roller Cone: 16.3—21.7 KN·m; PDC: 17—26.4 KN·m.
- Kuchera uye Gomba Kuvhura
1) Dzora kumhanya kwekudzikisa kuburikidza nekudzivirira kuvhuvhuta, casing musoro, yakaderedzwa dhayamita zvikamu, mapendekete, uye casing shangu.
2) Vhura gomba zvinyoronyoro kuburikidza neakaderedzwa dhayamita zvikamu, nekuchenjerera zvakanyanya kana uchishandisa PDC bits; kupomba kunofanira kutanga kusati kwavhura gomba.
3) Ita shuwa kudzika kwakadzikama kudzivirira kudzvanywa spikes.
4) Mubatanidzwa mumwe wekupedzisira kana chigadziko chinofanirwa kuve nekuyerera kwepamusoro kuvhura gomba kusvika pasi petsime.
3. Zvakanaka Pazasi Kuongorora
1) Sezvaunoswedera kuzasi kwetsime, tarisa kudhiraivha uye torque; kuwedzera kunoratidza kusangana nepasi kana jecha raunga.
2) Kana jecha riripo, simudza chibooreso chetambo uye tenderera pamwero wepamusoro wekuyerera kuti uve nechokwadi chekucheneswa kwepasi.
3) Mushure mekuchenesa, fambisa tambo yedrill kumusoro uye pasi.
4) Pakuchera kusina simba, shandisa 8 1/2" bit pa 17 KN uye 12 1/4" pa 25 KN, nekumhanya kwe40-60 RPM.
5) Pakuchera zvine simba, shandisa iyo 8 1/2" bit pa17 KN uye iyo 12 1/4" pa25 KN ine yakaderera inogoneka kumhanya.
- Kudhira Kuburikidza Sement Plugs uye Casing Zvishandiso
1) Ramba uchisimudza nekudzikisa tambo yekuchera panguva yekutenderera uye kutenderera kuchenesa bhiti.
2) Chengetedza dhiri yekumanikidza kudzivirira kukuvadzwa kwekucheka mazino uye kutakura zvisimbiso.
3) Monitor pombi kudzvanywa kudzivirira nozzle blockage.
4) Gadzirisa kumhanya kwekutenderera kana paine shanduko huru mukuchera kana torque.
5) Shandisa yakaderera drill pressure uye inononoka kutenderera kune yakagadzikana torque: powered drilling inofanira kuva neakakodzera kuyerera mwero; kuchera kusina-powered kunofanira kushandisa kuyerera kwakanyanya.
6) Simudza uye vhura gomba 4-5 metres ega ega uchiboora simende plug, uchiita izvozvo ka2-3, uye geza tsime pakuyerera kwakanyanya kwemavhiki 1-2 ega ega 25-30 metres kuti uve nechokwadi chekutenderera kwakazara kwemarara esimende kumusoro.
- Zvakanaka Pazasi Shaping
1) Shandisa yakaderera drill pressure, inononoka kutenderera, high flow rate, uye low torque.
2) Kuumbwa kuzasi kwetsime kunoenderana nerudzi rwebhiti uye chishandiso musanganiswa.
3) Pamaroller cone bits, shanda pa40-60 RPM uye drill pressure ye35 KN for 17 1/2", 24 KN for 12 1/4", uye 17 KN for 8 1/2 ", kuchengetedza angangoita 30 maminetsi ekuchera.
4) NokutiPDC zvikamu, shanda pasi pe 2 tani ye drill pressure pa 60-100 RPM, kuwedzera kudzvinyirira uye kugadzirisa kukurumidza mushure mekuchera zvishoma 1-1.5 mamita.
- Muedzo Drilling kuti usarudze Optimal Parameters
1) Kucherwa kwekuedza inzira inoshanda yekuona kusanganisa kwakaringana kwekudhiraivha uye kumhanya kwekutenderera kuti uwane yakakwirira machira ekuchera.
2) Kuitisa muyedzo kuchera kana paine shanduko mukuumbwa, mechanical yekuchera mwero, torque, vashandi, kana maparamendi ekushanda akadai sedhaka zvivakwa uye hydraulics.
3) Tanga kuyedza kudhiraivha nekumhanya kwakaderera, ine drill pressure yakaiswa kune yakanyanya kukurudzirwa bhiti.
4) Kana mareti emuchanicha akakwira achikwanisika kudhiraivha kwakasiyana-siyana nekumhanyisa musanganiswa, sarudza yakaderera isiri-kusvetuka yekumanikidza-kumhanya musanganiswa kuti uwedzere hupenyu hushoma.
5) Yakanyanya kudhiraivha kudzvanywa uye kumhanya kunofanirwa kutungamirwa neane magumo ekupedzisira uye torque miganhu.