Cal. CCP § 1203.52

Any person who shall, under contract with the owner of any leasehold for oil or gas purposes perform any labor or furnish any material or services used or employed, or furnished to be used or employed in the drilling or operating of any oil or gas well upon such leasehold, or in the constructing, putting together, or repairing of any material so used or employed, or furnished to be so used or employed, shall be entitled to a lien under this chapter, whether or not a producing well is obtained and whether or not such material is incorporated in or becomes a part of the completed oil or gas well, for the amount due him for any such labor performed, or materials or services furnished, within six months prior to the date of recording the statement of lien as provided in Section 1203.58, including, without limitation, shipping and mileage charges connected therewith, and interest from the date the same was due.