The grades of 6 Energy Equipment & Services stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

Baker Hughes Incorporated (BHI) improves from a D to a B rating this week. Baker Hughes Incorporated supplies products and technology services for the drilling and evaluation of oil and natural gas wells. The company also gets A’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of BHI stock.

Tenaris S.A. Sponsored ADR (TS) boosts its rating from a C to a B this week. Tenaris S.A. Sponsored ADR manufactures and supplies steel pipe products and related services for the world’s energy industry. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of TS stock.

This week, USA Compression Partners LP’s (USAC) ratings are up from a C last week to a B. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of USAC stock.

Fairmount Santrol Holdings, Inc. (FMSA) is seeing ratings go up from a B last week to a A this week. The company also gets A’s in earnings revisions and earnings momentum. For more information, get Portfolio Grader’s complete analysis of FMSA stock.

ION Geophysical Corporation (IO) gets a higher grade this week, advancing from a C last week to a B. ION Geophysical Corporation provides geophysical technology, services and solutions for the global oil and gas industry. The company also gets A’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of IO stock.

North American Energy Partners Inc. (NOA) earns a A this week, jumping up from last week’s grade of B. North American Energy Partners Inc. is a resource services provider to oil and natural gas, and other natural resource companies, with a primary focus in the Canadian oil sands. The company also gets A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of NOA stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.