Methods and Apparatus for Wireline Drilling On Coiled Tubing

a wireline and wireline technology, applied in the direction of drilling drives, drilling pipes, borehole/well accessories, etc., can solve the problems of low efficiency in the conversion of hydraulic power to drilling footage, limited reach of ct drilling, etc., and achieve the effect of improving the transportation of cuttings
US20090321141A1Inactive Publication Date: 2009-12-31SCHLUMBERGER TECH CORP
6 Cites 32 Cited by

Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SCHLUMBERGER TECH CORP
Publication Date
2009-12-31
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

Apparatus for drilling an underground borehole, comprising:a tubular conveyance system (18) including an electric cable and a supply of drilling fluid, the supply of drilling fluid being arranged in use to pump fluid from the surface down the inside of the tubular conveyance so as to return to the surface via the annulus between the outside of the tubular conveyance and the borehole;a drilling system comprising an electrically powered pump and a drilling motor, the pump being arranged in use to pump fluid from the borehole outside the drilling system up through the inside of the drilling system;a connector connecting the drilling system to the tubular conveyance system (18), through which the pump and motor are connected to the electric cable, anda flow diverter at which flow down the inside of the tubular conveyance system (18) is diverted into the annulus, and flow up the inside of the drilling system is diverted into the annulus.
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] This invention relates to methods and apparatus for drilling boreholes that is particularly applicable to drilling with wireline drilling apparatus carried on coiled tubing.BACKGROUND ART

[0002] Current conventional coiled tubing drilling (CTD) employs high hydraulic power delivered from the surface through the coiled tubing (CT) to power a drilling positive displacement motor (PDM) that in turn powers the drill bit. This high drilling power requires a large-diameter CT that demands larger surface installations.

[0003] Current methods of changing the trajectory in CTD typically involve a fixed bend on the PDM, and a hydraulic or electric-over-hydraulic means of rotating the bend azimuth. Apart from the larger and heavier surface equipment, this way of drilling on CT is limited in reach by the buckling limit of the CT, and involves a low-efficiency conversion of hydraulic power to drilling footage.

[0004] U.S. Pat. No. 2,548,616 describes a method of drilling a well ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More