Exhibit 7
JOINT FILING AGREEMENT
We, the undersigned, hereby express our agreement that the attached Schedule 13D/A is, and any further amendments thereto signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended. This agreement may be terminated with respect to the obligations to jointly file future amendments to such statement on Schedule 13D as to any of the undersigned upon such person giving written notice thereof to each of the other persons signatory hereto, at the principal office thereof.
| Date: June 14, 2018 | DEVON ENERGY CORPORATION | |||||
| By: | /s/ Jeffrey L. Ritenour | |||||
| Name: | Jeffrey L. Ritenour | |||||
| Title: | Executive Vice President and Chief Financial Officer | |||||
| DEVON ENERGY CORPORATION (OKLAHOMA) | ||||||
| By: | /s/ Jeffrey L. Ritenour | |||||
| Name: | Jeffrey L. Ritenour | |||||
| Title: | Executive Vice President | |||||
| DEVON GAS CO., L.L.C. | ||||||
| By: | /s/ Jeffrey L. Ritenour | |||||
| Name: | Jeffrey L. Ritenour | |||||
| Title: | Executive Vice President | |||||
| DEVON GAS OPERATING, INC. | ||||||
| By: | /s/ Jeffrey L. Ritenour | |||||
| Name: | Jeffrey L. Ritenour | |||||
| Title: | Executive Vice President | |||||
| DEVON GAS SERVICES, L.P. | ||||||
| By: | /s/ Jeffrey L. Ritenour | |||||
| Name: | Jeffrey L. Ritenour | |||||
| Title: | Executive Vice President | |||||
JOINT FILING AGREEMENT