Taa, anyị na-ewebata ọkpọkọ nchara na-adịghị mma nke a na-ejikarị mmanụ, ọkpọkọ mmanụ (GB9948-88) dabara maka tube refinery mmanụ, ihe na-ekpo ọkụ na ọkpọkọ enweghị nkebi.

A na-eji ọkpọkọ ígwè maka ịkụ ala geological (YB235-70) maka isi ihe na-egwupụta ihe site na ngalaba geological, nke nwere ike kewaa n'ime ọkpọkọ ọkpọkọ, olu olu, isi ọkpọkọ, ọkpọkọ casing na mmiri ozuzo dị ka ojiji ya si dị.

Ọkpụkpọ mmanụ bụ ụdị nchara ogologo nwere akụkụ oghere na enweghị njikọ gburugburu, ebe ọkpọkọ mgbawa mmanụ bụ ụdị akụkụ akụ na ụba nchara.
API: Ọ bụ Mbiri nke The English American Petroleum Institute, Chinese pụtara maka American Petroleum Institute.

OCTG: Ọ bụ mbiri nke Mmanụ Ala Tubular Ngwaahịa, nke pụtara mmanụ pụrụ iche ọkpọkọ na Chinese, gụnyere okokụre mmanụ casing, drill pipe, drill olu akwa, olu akwa, na mkpụmkpụ nkwonkwo, wdg.

Tubing: Ọkụ a na-eji eme mmanụ na gas, ịgba mmiri, na mgbaji acid n'ime olulu mmiri.

Casing: Ọkụ na-esi n'elu ụwa banye n'ime oghere nke ọma dị ka ihe mkpuchi iji gbochie mgbidi ahụ ịdaba.

Ọkpụkpọ ọkpọkọ: ọkpọkọ eji agba oghere.

Pipe: ọkpọkọ eji ebu mmanụ na gas.

Olu akwa: cylinder nke nwere eriri dị n'ime nke ejiri jikọọ ọkpọkọ eriri abụọ.

Ihe eji ejikọta: ọkpọkọ eji eme njikọ.

Eriri API: eriri ọkpọkọ akọwapụtara na API 5B, gụnyere eriri ọkpọkọ okirikiri, eriri ọkpọkọ dị mkpụmkpụ, eriri ọkpọkọ ogologo ogologo, eriri ọkpọkọ trapezoidal akwụ ụgwọ, eriri ọkpọkọ ọkpọkọ, wdg.

Eriri pụrụ iche: ụdị eri na-abụghị API nwere akara pụrụ iche, njikọ na akụrụngwa ndị ọzọ.

Ọdịda: mfu nke ọrụ mbụ n'ihi nrụrụ, mgbaji na mmebi elu n'okpuru ọnọdụ ọrụ akọwapụtara.Ụdị isi nke ọdịda casing bụ: extrusion, slip, rupture, leakage, corrosion, bonding, wear and so na.