Kev sib txuas ntawm cov yeeb nkab laum-feem ntau hu ua "cov cuab yeej pob qij txha"- yog ib qho tseem ceeb ntawm cov hlua tho. Lawv yuav tsum tiv taus lub zog loj heev, lub zog tensile, thiab kev ntxhov siab ntawm lub voj voog thaum tuav lub siab - nruj seal. Nkag siab txog ntau hom xov thiab hom kev sib txuas yog qhov tseem ceeb rau kev ua kom muaj kev nyab xeeb thiab ua haujlwm zoo drilling.
Kev faib tawm tseem ceeb ntawm kev sib txuas ntawm cov yeeb nkab laum
Laum cov yeeb nkab sib txuas yog dav categorized los ntawm lawv cov ntawv xov thiab sealing mechanism. Cov qauv siv dav tshaj plaws yog txhais los ntawm American Petroleum Institute (API) thiab ntau yam kev sib txuas ntawm tus kheej.
1. Kev sib txuas API
API kev sib txuas yog cov qauv kev lag luam rau feem ntau ntawm cov pa ua haujlwm drilling. Lawv txhim khu kev qha, muaj dav, thiab raug nqi - zoo. Cov ntaub ntawv tseem ceeb API xov muaj xws li:
Regular (REG) Xov Xwm:Ib qho ntawm cov qauv qub tshaj plaws thiab muaj zog tshaj plaws. Lawv feature ntxhib threads thiab ib tug kuj tsawg taper, muab siab torque muaj peev xwm. Feem ntau siv rau cov cuab yeej loj xws li laum dab tshos, stabilizers, thiab hauv qab - qhov sib dhos (BHA) cov khoom.
Full Hole (FH) Xov:Tsim los muab ib txoj kab uas hla loj dua (tsawg ntws txwv) dua li cov xov tsis tu ncua rau tib txoj kab uas hla sab nraud. Lawv muaj cov xov xov zoo dua thiab feem ntau siv rau hauv cov yeeb nkab laum rau cov ntawv thov uas yuav tsum tau ua kom qis qis qis.
Internal Flush (IF) Xov Xwm:Tsim los muab qhov ze ntawm -cov kab nruab nrab sab hauv thoob plaws qhov sib txuas (cov cuab yeej sib koom ua ke ID yuav luag zoo ib yam li cov yeeb nkab lub cev ID). Qhov no minimizes turbulence thiab hnav. IF threads muaj ntau dua ntawm - txoj kab uas hla laum yeeb nkab thiab qee cov cuab yeej BHA.
Cov ntsiab lus tseem ceeb ntawm API Kev Sib Txuas:
Xov Taper:Feem ntau 1: 6 lossis 1: 4 (hloov hauv txoj kab uas hla ntawm ib chav tsev ntev).
Xov Pitch:Cov xov tooj ntawm ib nti (piv txwv li, 4 TPI, 5 TPI).
Xov Form:Cov duab ntawm cov xov profile (piv txwv li, V-puab rau API).
Box thiab Pin:Cov poj niam (lub thawv) thiab txiv neej (pin) xaus ntawm kev sib txuas.
2. Kev sib txuas hwm zoo
Kev sib txuas hwm yog cov qauv tsim uas muaj cov yam ntxwv ua tau zoo dua qub piv rau cov qauv API threads. Lawv yog qhov tseem ceeb rau cov ntawv thov nyuaj xws li txuas ntxiv- ncav cuag qhov drilling, siab - siab / siab- qhov kub thiab txias (HPHT) qhov dej, thiab cov qhov dej sib txawv.
Qhov zoo ntawm Premium Txuas:
Superior Sealing:Feem ntau muaj cov hlau-rau- cov ntsaws ruaj ruaj hlau ntxiv rau lossis hloov cov xov sib txuas- nyob ntawm cov ntsaws ruaj ruaj.
Siab Torque Capacity:Tsim los tiv taus ntau dua torque yam tsis muaj kev ua haujlwm.
Txhim kho Fatigue Resistance:Optimized thread profiles txo cov ntsiab lus kev ntxhov siab.
Zoo dua dabtsi yog khoov Performance:Zoo tagnrho rau cov qhov dej sib txawv heev thiab kab rov tav.
Cov khoom lag luam muaj xws li Hydril, VAM, Tenaris, thiab NS-CC, txhua qhov muab ntau yam kev sib txuas rau cov ntawv thov tshwj xeeb (xws li, semi-flush, flush, lossis chim siab OD).
Basic Nomenclature thiab Specifications
Ib qho kev sib txuas ntawm cov yeeb nkab yog feem ntau piav qhia los ntawm:
Nominal Loj:Sab nraud txoj kab uas hla ntawm lub cev yeeb nkab (xws li, 5-nti laum yeeb nkab).
Hom kev sib txuas:eg, 5-1/2" FH, 4-1/2" IF, 6-5/8" REG.
Hom mob siab:Internal Upset (IU), External Upset (EU), lossis Internal -External Upset (IEU), qhia seb cov yeeb nkab kawg yog tuab npaum li cas kom haum rau cov xov.
Qhov tseem ceeb ntawm kev xaiv kev sib txuas kom raug
Xaiv txoj cai laum yeeb nkab txuas yog qhov tseem ceeb rau:
Tiv thaiv kev ua tsis tiav ntxov:Cov xov tsis sib xws lossis hnav tuaj yeem ua rau twist -offs los yog kev sib txuas.
Ua kom muaj siab ncaj ncees:Kev sib khi kom zoo tiv thaiv cov dej ntws ntawm cov dej drilling, uas tuaj yeem ua rau muaj kev tswj xyuas zoo.
Maximizing Torque Hloov:Lub peev xwm torque tsim nyog yuav tsum tau ua rau drilling nyuaj formations thiab tuav rov qab -reaming.
Txo qhov tsis yog - Lub Sijhawm Ua Haujlwm (NPT):Kev sib txuas tsis ua haujlwm yog qhov ua rau muaj kev ua haujlwm nuv ntses thiab poob -hauv- qhov xwm txheej.
Kev sib txuas ntawm cov yeeb nkab laum-txawm yog tus qauv API lossis hom qib siab tshaj plaws- yog qhov tseem ceeb rau kev xyaum txoj hlua kev ncaj ncees. Kev nkag siab zoo ntawm cov ntaub ntawv xov (REG, FH, IF), kev sib txuas lus tshwj xeeb, thiab lawv cov ntawv thov ua rau cov engineers thiab cov neeg ua haujlwm rigs xaiv, tshuaj xyuas, thiab tswj kev sib txuas kom raug, ua kom muaj kev nyab xeeb thiab ua haujlwm zoo hauv txhua hom dej. Yog xav paub ntxiv, thov tsis txhob yig tiv tauj pab pawg Vigor kom paub meej ntxiv txog cov khoom lag luam.
