Sistemụ Casing Symmetric nwere mgbanaka Bit

1.In bụghị ike nkume guzobe, na casing dị mkpa na-eso.

2.Na-emekarị na ntọala ma ọ bụ mmiri olulu mmiri, maka nnukwu oghere na-agwụ ike.

3.drilling omimi dị mma karịa 40 mita iji chịkwaa oghere ahụ nke ọma.ibu omimi dịkwa na ndị ọzọ aghụghọ.

4.match na 12 "hama na 406mm casing tube.

5. ikuku ikuku bụ 25 Bar na ikuku volumn bụ 1500 cfm.

6. a na-ahapụ ihe mgbanaka n'ime oghere.

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Uru

1. nhazi nke concentric bụ ihe a pụrụ ịdabere na ya na nke dị ntakịrị karịa eccentric.

2. nnukwu mmetụta ike na-eme ka mkpọpu ngwa ngwa dị elu.

3. oghere kwụ ọtọ.

4. dị mfe ịgbaso casing.

5. tụgharịa ntụgharị na ịdọrọ pilot bit iji ya maka oghere ndị ọzọ.

A	B	C	D	E	F
Mpụta Dia.nkeIgwe mkpuchi tube	Dia n'ime.nkeIgwe mkpuchi tube	Reamed Dia.	Min.Dia n'ime.nkeAkpụkpọ ụkwụ casing	Ụdị hama	Ọkụkụ ọkpọkọ
mm	mm	mm	mm		mm
114	101-103	125	93	TDS79	60
140	124-127	152	113	TDS98	76
146	127-132	154	115	TDS98	76
168	149-155	184	138	TDS122	76,89
178	159-165	194	148	TDS122	76,89
193	173-180	206	164	TDS139	114
219	199-206	234	185	TDS139,TDS180	114
244	224-231	273	219	TDS180	114