Lub square laum yeeb nkab, laum yeeb nkab, hnyav laum yeeb nkab thiab laum dab tshos nyob rau hauv lub drilling cuab yeej tsim lub laum kab. Drilling yeeb nkab yog lub hauv paus drilling cuab yeej los tsav lub laum me ntsis los ntawm hauv av mus rau hauv qab ntawm lub qhov dej, thiab nws kuj yog ib tug channel ntawm hauv av mus rau hauv qab ntawm lub qhov dej. Nws muaj 3 lub luag haujlwm tseem ceeb:
① Hloov lub zog kom tsav lub laum me ntsis txhawm rau tho qhov dej;
② Kev cia siab ntawm nws tus kheej qhov hnyav los ua kom lub zog ntawm lub laum me ntsis kom tawg lub pob zeb hauv qab ntawm qhov dej;
③ Kev xa cov dej ntxuav, piv txwv li cov av nkos los ntawm cov av nkos siab siab hauv av, mus rau hauv lub qhov dej ntawm qhov drilling kem kom ntws mus rau hauv qab ntawm qhov dej kom yaug cov pob zeb chips thiab txias lub laum me ntsis, thiab nqa cov pob zeb chips. los ntawm qhov chaw annular nruab nrab ntawm sab nrauv ntawm lub qhov drilling thiab phab ntsa ntawm lub qhov dej kom rov qab mus rau hauv av, thiaj li ua tiav lub hom phiaj ntawm qhov drilling qhov dej. Drilling yeeb nkab nyob rau hauv cov txheej txheem drilling kom tiv taus ntau yam kev hloov pauv, xws li tensile, compression, torsion, dabtsi yog khoov thiab lwm yam kev ntxhov siab, lub puab nto kuj raug rau cov av nkos siab thiab corrosion.
(1) Square Drill Pipe: Muaj ob hom square laum yeeb nkab: quadrilateral hom thiab hexagonal hom. Nws specifications yog: 63.5mm ({3}}/2in), 88.9mm ({7}}/2in), 107.95mm ({11}}/4in), 133.35mm ({15}}/4in ), 152.4mm (6in) thiab lwm yam. Feem ntau siv ntev yog 12 ~ 14.5m.
(2) Laum yeeb nkab: Laum yeeb nkab yog cov cuab yeej tseem ceeb rau cov qhov dej drilling, txuas nrog rau qhov qis kawg ntawm cov yeeb nkab square, thiab raws li lub qhov dej drilling txuas ntxiv mus, cov yeeb nkab laum ua kom ntev lub laum kab ib tom qab. Qhov tshwj xeeb ntawm cov yeeb nkab laum yog: 60.3mm (2-3/8in), 73.03mm ({7}}/8in), 88.9mm ({11}}/2in), 114.3mm ({15} }/2in), 127mm (5in), 139.7mm ({21}}/2in) thiab lwm yam.
(3) Weighted laum yeeb nkab: Weighted laum yeeb nkab yog ib qho kev hloov pauv cov cuab yeej sib txuas cov laum yeeb nkab thiab laum dab tshos, uas tuaj yeem txhim kho qhov kev quab yuam ntawm cov yeeb nkab laum thiab ua kom lub zog ntawm laum ntsis. Cov ntsiab lus tseem ceeb ntawm qhov hnyav laum yeeb nkab yog 88.9mm ({3}}/2in) thiab 127mm (5in).
(4) Laum dab tshos: lub dab tshos laum txuas nrog rau sab qis ntawm cov yeeb nkab laum, uas yog cov yeeb nkab tshwj xeeb tuab-walled nrog kev ua haujlwm siab, ua kom lub zog ntawm lub laum me ntsis kom tawg lub pob zeb, thiab ua lub luag haujlwm coj thaum drilling. ib lub qhov dej ncaj. Cov kev qhia tshwj xeeb ntawm lub tsho laum yog: 158.75mm (6-1/4in), 177.85mm (7in), 203.2mm (8in), 228.6mm (9in) thiab lwm yam.
