Exhibit 99.1
JOINT FILING AGREEMENT
Pursuant to Rule13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned agree that the Statement on Schedule 13G to which this exhibit is attached is filed on behalf of each of them.
Dated: January 22, 2018 | ||
GEODynamics B.V. | ||
By: | /s/ J. Will Franklin | |
| Name: J. Will Franklin | ||
| Title: Authorized Person | ||
LRP IV Luxembourg Holdings S.a.r.l. | ||
By: | /s/ Patrick Lauria | |
| Name: Patrick Lauria | ||
| Title: Manager | ||
Lime Rock Partners IV, L.P. | ||
By: | /s/ J. Will Franklin | |
| Name: J. Will Franklin | ||
| Title: Authorized Person | ||
LRP V Luxembourg Holdings S.a.r.l. | ||
By: | /s/ Patrick Lauria | |
| Name: Patrick Lauria | ||
| Title: Manager | ||
Lime Rock Partners V, L.P. | ||
By: | /s/ J. Will Franklin | |
| Name: J. Will Franklin | ||
| Title: Authorized Person | ||
* | ||
Jonathan C. Farber | ||
* | ||
John T. Reynolds | ||
* By:/s/ Kris Agarwal | ||
Kris Agarwal, Attorney-in-Fact | ||
