Drainhold drilling

• US 4,476,945 A
• Filed: 02/10/1983
• Issued: 10/16/1984
• Est. Priority Date: 02/10/1983
• Status: Expired due to Fees

• Current Assignee: Atlantic Richfield Company Incorporated (BP PLC)
• Original Assignee: Atlantic Richfield Company (BP PLC)
• Inventors: Hearn, David D.
• Primary Examiner(s): Leppink, James A.
• Assistant Examiner(s): Dang, Hoang C.
• Application Number:
  US06/465,407
• Time in Patent Office: 614 Days
• Field of Search: 175/61, 175/62, 175/202, 175/203, 175/103, 175/85, 175/162, 175/52, 175/220, 166/75 R, 166/50, 166/77, 166/77.5, 137/355.12, 137/355.16, 137/355.19, 137/355.26, 137/355.27
• US Class Current: 175/203
• CPC Class Codes: E21B 19/22 Handling reeled pipe or rod units, e.g. flexible drilling pipes lifting or hauling appliances using two or more cooperating endless chains B66D3/003

Abstract

A method and apparatus for drilling and/or working in a drainhole wellbore which extends laterally from a primary wellbore which utilizes flexible hose which can be deployed into the primary wellbore and recovered from the primary wellbore in a coiled fashion, and uses apparatus for coiling, deploying and recovering the flexible hose which includes a rotatable drum operatively connected with a movable beam and guide means. The beam and guide means are utilized to position the flexible hose over the primary wellbore in such a manner that essentially only vertical external forces and essentially no lateral external forces are applied to the apparatus thereby eliminating the need to rigidly fix the apparatus to the earth or other support means when in use.

Claims

1. Apparatus for employing a coiled hose into a primary wellbore and for recovering said hose from said wellbore in a coiled manner comprising a base means, a support means carried by said base means, a drum means for carrying said hose in a coiled manner, said drum means being rotatably supported by said support means, a rigid beam pivotally carried by said support means and extending away from said drum means so that said hose passes to or from said drum means along said beam, a guide means fixed to the end of said beam furthest from said drum means for guiding said hose from said furthest end of said beam down into said primary wellbore or out of said primary wellbore up to said beam, said hose when being employed or received being under tension and said beam supporting said hose being under compression, at least one of said beam and guide means carrying means adapted to be supported by a well drilling derrick so that when employing or receiving said hose the tension force in said hose is essentially matched by the compression force in said beam and essentially only vertical external forces are applied to said apparatus with the result that essentially no lateral external forces are applied to said base means thereby eliminating the need to rigidly fix said base means to the earth or other support means when said apparatus is in use.

2. The apparatus of claim 1 wherein said drum means is adapted to hold a plurality of hoses thereon at the same time and in a side-by-side relationship.

3. The apparatus of claim 1 in combination with a well derrick which includes a working floor with a hole therein situated over said primary wellbore and in said combination said base means sits adjacent said working floor, said beam extends over said working floor, and said guide means is positioned over said hole so that the hose on said guide means is aligned with said primary wellbore while said hose enters or leaves said primary wellbore.