Laum dab tshos yog ib qho hnyav, tuab-walled steel raj nrog threaded kev twb kev txuas txiav (NB tsis welded) ntawm ob hnub uas peb siv nyob rau hauv oilfield drilling rigs. Lawv yog tsim los tiv thaiv downhole tej yam kev mob thaum nyob rau hauv compression thiab nro. Thaum tsim BHA, drilling engineers tso DCs hauv qab cov kav dej laum los yog cov kav dej hnyav tshaj qhov Drill Bit li DCs yog cov khoom tseem ceeb ntawm Drilling BHA. Txhawm rau xaiv DC kom raug, koj yuav tsum muaj tag nrho cov ntaub ntawv hais txog Drill collar Weights, Size, Specs, Definition, lengths, and types.
Tsis tas li ntawd, lawv tau tsim los ntawm chrome-molybdenum alloy 4140 (4140 yog ib txoj cai uas qhia txog cov tshuaj pleev xim ntawm cov hlau). Tsis tas li ntawd, lawv tau kho cua sov thiab quenched dhau lawv qhov ntev, nrog rau Brinell hardness ntau ntawm 255 txog 341 kom tau txais cov khoom siv kho tshuab raws li API Spec 7-1. Lawv bore yog raug machined los xyuas kom meej du, balanced rotation. Cov dab tshos yog tsim nyob rau hauv ntau qhov ntau thiab tsawg (ODs) thiab muaj nyob rau hauv qhov ntev 2: 9.15 - 9.76 m (30 - 32 ft); thiab 3: 12.8 - 13.27 m (42 ft -43 ft). Drill Collar kuj tseem tuaj yeem tsim siv cov hlau nplaum los yog kauv dab tshos, nrog rau txoj hlua sib txuas, hnyav nce, thiab muab kauv grooves rau sab nraud kom zoo dua drilling av hom khiav tswj.
Qee qhov haujlwm ntawm cov dab tshos yog raws li hauv qab no:
- Muab qhov hnyav ntawm me ntsis (WOB) & nce me ntsis kev ua haujlwm.
- Txo cov teeb meem me ntsis kev ruaj ntseg los ntawm kev xyaum hlua kev vibrations, wobbling, thiab dhia.
- Muab lub zog xav tau los khiav hauv compression
- Txo txo cov teeb meem kev tswj xyuas los ntawm kev ua kom nruj rau BHA los pab tho qhov ncaj los yog ntsug.
- Khaws cov hlua tho hauv qhov nro kom txo qis kev ntxhov siab thiab xyaum txoj hlua tsis ua haujlwm vim qaug zog.
- Muab cov nyhuv pendulum. (BHA Hom).
- Txo cov rooj zaum, doglegs & ledges.
Laum dab tshos muaj nyob rau hauv ntau qhov ntau thiab tsawg, xws li round, square, triangular, thiab kauv grooved.Cov tsis siv los txheeb xyuas cov tho dab tshos specifications yog:
- OD: 9 1/2″, 8″, 6″, 4 3/4″ thiab lwm yam,
- ID: 3 1/2", 3", 2 1/2", 2 3/8", thiab lwm yam,
- Ntev: Feem ntau ntau II
- Khoom siv: Hlau, Monel
- Kev sib txuas: 6 5/8″ REG thiab lwm yam.
Slick Hom
Hom slick yog qhov ntau tshaj plaws uas tau siv txij thaum pib. Nws tsis muaj qhov tshwj xeeb. Nws txoj haujlwm tseem ceeb yog ntxiv qhov hnyav rau me ntsis thiab ua kom muaj kev ruaj ntseg thaum drilling.
Spiral Drill dab tshos
Thaum drilling los ntawm tej yam formations, lub loj txoj kab uas hla D / Cs yuav daig (Piv txwv sticking teeb meem) tiv thaiv lub borehole (differential sticking). Qhov no yuav tshwm sim thaum tsim muaj qhov ntxeem tau, siv qhov sib npaug loj ntawm cov av nkos, thiab qhov dej deviates. Ib txoj hauv kev tiv thaiv qhov teeb meem no yog txo qhov chaw sib cuag ntawm dab tshos tiv thaiv lub qhov dej. Peb tuaj yeem txiav cov grooves rau hauv lub dab tshos kom txo nws qhov chaw.
Hom Tsis-Magnetic
Hom DC feem ntau yog qhov tsis sib nqus laum dab tshos. Nws yog tsim los ntawm cov hlau alloy nrog ib txheej txheej machined rau ib qho kev smoothness thiab lub elevator recess vojvoog uas ua tau raws li qhov yuav tsum tau muaj. Peb yuav tsum them nyiaj tshwj xeeb thaum tsim NMDCs. Qhov no yog vim hais tias cov khoom muaj kev cuam tshuam rau lub galling ntawm cov xov thiab lub xub pwg nyom dua li ib txwm DCs. Lawv tsom mus cais cov kev taw qhia Kev Tshawb Fawb Cov Cuab Yeej los ntawm kev sib nqus sib nqus vim yog cov hlua Drilling.
Vigor tuaj yeem muab rau koj nrog txhua yam ntawm cov qauv uas tau hais los saum toj no, qhov ntev ntawm cov hlua tho kom tau raws li qhov xav tau ntawm qhov chaw. Tam sim no, peb lub tsho laum tau siv rau hauv cov roj av loj thoob ntiaj teb, thiab tau txais cov lus pom zoo rau cov neeg siv khoom. Yog tias koj txaus siab rau Vigor's laum dab tshos series los yog lwm yam cuab yeej rau natural downhole drilling thiab ua tiav cov roj av ntuj warps, thov tsis txhob yig tiv tauj peb rau qhov zoo tshaj plaws kev pab cuam.
