This week, 4 Energy Equipment & Services stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

This is a strong week for RPC, Inc. (RES). The company’s rating climbs to B from the previous week’s C. RPC, Inc. provides specialized oilfield services and equipment to independent and major oilfield companies. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of RES stock.

Unit Corporation (UNT) improves from a C to a B rating this week. Unit Corporation is a contract drilling company that engages in land drilling of natural gas and oil wells. The company also gets A’s in earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of UNT stock.

Transocean Partners LLC (RIGP) earns a B this week, jumping up from last week’s grade of C. The company also gets A’s in earnings momentum and return on equity. For more information, get Portfolio Grader’s complete analysis of RIGP stock.

This week, Profire Energy, Inc. (PFIE) pushes up from a C to a B rating. For more information, get Portfolio Grader’s complete analysis of PFIE 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.