# HYDRIL CO

HYDRIL CO is a company headquartered in Houston, TX, United States.

## Company overview

- **Legal name:** HYDRIL CO
- **Classification:** Company
- **Industry (SIC):** 3533 — Oil & Gas Field Machinery & Equipment
- **Headquarters:** Houston, TX, United States
- **Incorporated in:** DE
- **SEC CIK:** 0001116030

## About

HYDRIL CO is identified in the retained SEC EDGAR snapshot dated 2026-10-14. Its SEC Central Index Key is 0001116030, and its reported industry is Oil & Gas Field Machinery & Equipment. The retained history contains 12 filings, including 8-K filed on 2007-05-07. Each filing retains its accession, filing date and original SEC document link. This historical evidence does not establish current registration, listing, ownership or financial condition.

## Recent SEC filings

- Form 8-K — filed 2007-05-07 — period 2007-05-07 — FORM 8-K - CURRENT REPORT
- Form 10-Q — filed 2007-05-04 — period 2007-03-31 — FORM 10-Q - QUARTERLY REPORT
- Form 8-K — filed 2007-05-03 — period 2007-05-02 — FORM 8-K
- Form 10-K/A — filed 2007-04-30 — period 2006-12-31 — AMENDMENT NO.1 TO FORM 10-K
- Form 8-K — filed 2007-04-26 — period 2007-04-24 — FORM 8-K - CURRENT REPORT
- Form SC 13D — filed 2007-03-13
- Form 8-K — filed 2007-03-08 — period 2007-03-02 — FORM 8-K
- Form 10-K — filed 2007-03-01 — period 2006-12-31 — FORM 10-K
- Form SC 13D — filed 2007-02-21 — SCHEDULE 13D
- Form 8-K — filed 2007-02-12 — period 2007-02-11 — FORM 8-K
- Form SC 13G — filed 2007-02-06 — INITIAL 13G
- Form 8-K — filed 2007-02-01 — period 2007-01-31 — FORM 8-K

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Updated: 2026-10-23T22:53:27Z

Canonical page: https://altss.com/profile/hydril-co

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