Method and device for treatment of a pipestring section that is positioned in a set-back

Abstract

A method for treating pipe string sections being in a set-back and being arranged in a vertical position comprises arranging a remote-controllable manipulator at least at one of the threaded portions of the pipe string sections. In addition, the method comprises providing the remote-controllable manipulator with a tool. The tool is arranged to at least clean or lubricate said threaded portion. Further, the method comprises moving the tool to a threaded portion which is to be treated and at least clean or lubricate the threaded portion.

Claims

1. A set-back for pipe string sections, comprising: a plurality of pipe string sections that are vertically oriented and laterally spaced within the set-back at a location that is spaced and separate from a well center, wherein each of the pipe string sections has a threaded portion at an upper end of the pipe string section; and a tool configured to clean or lubricate the threaded portion of each of the pipe string sections while the pipe string sections are disposed within the set-back; wherein the tool is connected to a remote-controllable manipulator configured to position the tool at each of the threaded portions of the pipe string sections while the pipe string sections are disposed within the set-back; and wherein the manipulator includes: a guide configured to move along on a rail mounted to a derrick; and a plurality of pivoting arms, wherein each pivoting arm is pivotally coupled to another of the pivoting arms at one end and is pivotally coupled to one of the guide and the tool at an opposite end.

2. The set-back in accordance with claim 1, wherein the manipulator has a working range covering the entire set-back.

3. The set-back in accordance with claim 1, wherein the pivoting arms of the manipulator are hydraulically movable.

4. The set-back in accordance with claim 1, wherein the pivoting arms of the manipulator are electrically movable.

5. The set-back in accordance with claim 1, wherein the manipulator is configured to cooperate with a position indication system which is arranged to show the position of the tool on a display.

6. The set-back in accordance with claim 1, wherein the plurality of pipe string sections are arranged in a plurality rows within the set-back.

7. The set-back of claim 1, wherein the manipulator further comprises a pitch rack mounted to the derrick; and wherein the guide is coupled to the pitch rack to facilitate movement of the guide along the rail.

8. A set-back for pipe string sections, comprising: a plurality of pipe string sections that are vertically oriented and laterally spaced within the set-back, wherein each of the pipe string sections has a threaded portion; and a tool configured to clean or lubricate the threaded portion of each of the pipe string sections while the pipe string sections are disposed within the set-back; wherein the tool is connected to a remote-controllable manipulator configured to position the tool at each of the threaded portions of the pipe string sections while the pipe string sections are disposed within the set-back; and wherein the manipulator includes: a swivel guide mounted to a derrick; and a plurality of pivoting arms, wherein each pivoting arm is pivotally coupled to another of the pivoting arms at one end and is coupled to one of the swivel guide and the tool at an opposite end; wherein the plurality of pivoting arms is configured to rotate relative to the derrick about the swivel guide.

9. The set-back in accordance with claim 8, wherein the manipulator has a working range covering the entire set-back.

10. The set-back in accordance with claim 8, wherein the manipulator is configured to cooperate with a position indication system which is arranged to show the position of the tool on a display.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In what follows is described an example of a preferred method and embodiment which is visualized in the accompanying drawings, in which:

(2) FIG. 1 shows a side view of a device according to the invention, the device being placed in a derrick;

(3) FIG. 2 shows a plan view of the device of FIG. 1;

(4) FIG. 3 shows the device of FIG. 1, but in a displaced position;

(5) FIG. 4 shows a side view of the device according to the invention in an alternative embodiment; and

(6) FIG. 5 shows a plan view of the device of FIG. 4.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(7) In the drawings, the reference numeral 1 indicates a derrick with a set-back 2 for pipe string sections 4. The supporting structure 3 of the set-back 2 is of a design known per se.

(8) A manipulator 6 is rotatably and height-displaceably connected to the derrick 1 by means of an electrically or hydraulically activatable swivel guide 8. From the swivel guide 8, two first parallel-motion arms 10 extend to a connecting link 12. Two other parallel-motion arms 14 extend from the connecting link 12 to an elevation guide 16.

(9) The first and second parallel-motion arms 10, 14 are rotatable in a vertical plane around their respective supporting bolts 18 in, respectively, the swivel guide 8, the connecting link 12 and in the elevation guide 16. The components 8, 10, 12, 14 of the manipulator 6, which are electrically or hydraulically operated, are arranged to hold the elevation guide 16 in a vertical position as it is moved in and out relative to the swivel guide 8.

(10) The elevation guide 16 includes a hydraulic vertically movable tool holder 20 which is provided with a cleaning and lubricating tool 22, hereinafter called tool, of a design known per se for treating the threaded portions 24 of the pipe string sections.

(11) The manipulator 6 is arranged to controlledly rotate around the swivel guide 8. Additionally, the manipulator 6 is arranged to be displaced heightwise in the swivel guide 8 to coarsely adjust the height level of the manipulator 6 relative, to the length of the pipe string sections 4.

(12) A camera 26 is placed on the elevation guide 16 and directed towards the tool 22 and the threaded portions 24.

(13) When one or more threaded portions 24 of the pipe string sections 4 are to be treated, the tool 22 is carried automatically or manually by means of the manipulator 6 to a position at the first of the threaded portions 24 that are to be treated. A picture from the camera 26 is shown on a screen, not shown, whereby an operator, not shown, can position the tool 22 approximately concentrically above the threaded portion 24.

(14) The tool 22 is then moved into the threaded portion 24, after which cleaning and lubricating is carried out in a manner known per se. By measuring how far down the tool 22 is moved before it is in its active position in the threaded portion 24, the length of the relevant tool string section from a pipe end support, not shown, may be determined.

(15) Then the tool 22 is moved out of the threaded portion 24 and positioned above the next threaded portion 24 that is to be treated.

(16) In an alternative embodiment, see FIGS. 4 and 5, the manipulator 6 includes a guide 30 which is vertically movable on a rail 32 by means of an electrically or hydraulically operated gear, not shown, which is in engagement with a pitch rack 34. The rail 32 and the pitch rack 34 are fixed to the derrick 1.

(17) A first pivotal arm 36 extends approximately horizontally between a first pivot joint on the guide 30 and a second pivot joint 40 at its opposite end portion.

(18) A second pivotal arm 42 extends approximately horizontally from the second pivot joint 40 and is provided, at its opposite end portion, with an elevation guide 16 for a tool holder 20. The tool holder 20 is provided with a cleaning and lubricating tool. A camera 26 is connected to the elevation guide 16.

(19) The first pivot joint 36, the second pivot joint 38 and the elevation guide 16 are remote-controllable by means of electric or hydraulic actuators, not shown.

(20) Thereby, in a manner corresponding to that described above, the cleaning and lubricating tool 24 may be positioned at a desired threaded portion 24 to clean and lubricate the threaded portion 24.