3 Energy Equipment & Services stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

This week, Halliburton Company’s (HAL) ratings are up from a C last week to a B. Halliburton Company provides energy services and engineering and construction services, as well as manufactures products for the energy industry. The company also gets A’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of HAL stock.

This is a strong week for Helix Energy Solutions Group, Inc. (HLX). The company’s rating climbs to B from the previous week’s C. Helix Energy Solutions Group, Inc. is a marine contractor and operator of offshore oil and gas properties and production facilities. The company also gets A’s in earnings revisions and earnings momentum. For more information, get Portfolio Grader’s complete analysis of HLX stock.

North American Energy Partners Inc.’s (NOA) ratings are looking better this week, moving up to a B from last week’s C. 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.